彻底改版2.0

netfriend/astackwidget/astackwidget.cpp

@@ -0,0 +1,172 @@
+#include "astackwidget.h"
+
+#include <QDebug>
+#include <QPropertyAnimation>
+
+AStackWidget::AStackWidget(QWidget *parent)
+	: QWidget(parent)
+{
+	m_offset = 0;
+	m_curIndex = 0;
+    m_lastIndex = 0;
+	m_duration = 500;
+	m_moveAnimation = new QPropertyAnimation(this, "");
+	m_moveAnimation->setDuration(m_duration);
+	connect(m_moveAnimation, &QPropertyAnimation::valueChanged, this, &AStackWidget::onValueChanged);
+	connect(m_moveAnimation, &QPropertyAnimation::finished, this, &AStackWidget::onMoveFinished);
+}
+
+AStackWidget::~AStackWidget()
+{
+
+}
+
+int AStackWidget::count() const
+{
+	return m_widgetLst.size();
+}
+
+int AStackWidget::currentIndex() const
+{
+	return m_curIndex;
+}
+
+void AStackWidget::setDuration(int duration)
+{
+	m_duration = duration;
+}
+
+int AStackWidget::addWidget(QWidget * widget)
+{
+	int index = indexOf(widget);
+	if (index >= 0){
+		return index;
+	}
+	widget->setParent(this);
+	m_widgetLst.append(widget);
+	return count() - 1;
+}
+
+int AStackWidget::indexOf(QWidget * widget) const
+{
+	return m_widgetLst.indexOf(widget);
+}
+
+int AStackWidget::insertWidget(int index, QWidget * widget)
+{
+	int curindex = indexOf(widget);
+	if (curindex >= 0) {
+		return curindex;
+	}
+	widget->setParent(this);
+	m_widgetLst.insert(index, widget);
+	return index;
+}
+
+QWidget * AStackWidget::currentWidget() const
+{
+	if (m_curIndex >= 0 && m_curIndex < count()){
+		return m_widgetLst.at(m_curIndex);
+	}
+    return 0;
+}
+
+QWidget * AStackWidget::widget(int index) const
+{
+	if (index >= 0 && index < count()) {
+		return m_widgetLst.at(index);
+	}
+    return 0;
+}
+
+void AStackWidget::removeWidget(QWidget * widget)
+{
+	int index = indexOf(widget);
+	if (index >= 0) {
+		m_widgetLst.removeAll(widget);
+		emit widgetRemoved(index);
+	}
+}
+
+void AStackWidget::setCurrentWidget(QWidget * widget)
+{
+	int index = indexOf(widget);
+	if (index >= 0 && m_curIndex != index) {
+		setCurrentIndex(index);
+	}
+}
+
+void AStackWidget::setCurrentIndex(int index)
+{
+	if (index >= 0 && m_curIndex != index) {
+		m_lastIndex = m_curIndex;
+		m_curIndex = index;	
+		moveAnimationStart();
+		emit currentChanged(index);
+	}
+}
+
+void AStackWidget::resizeEvent(QResizeEvent *event)
+{
+	QWidget::resizeEvent(event);
+
+	int size = count();
+	for (int i = 0; i < size; i++) {
+		m_widgetLst.at(i)->resize(this->width(), this->height());
+	}
+
+	if (m_moveAnimation->state() == QAbstractAnimation::Running) {
+		moveAnimationStart();
+	}
+	else {
+		setWidgetsVisible();
+        onValueChanged(0);
+	}
+}
+
+void AStackWidget::onValueChanged(const QVariant &value)
+{
+	m_offset = value.toInt();
+	m_widgetLst.at(m_curIndex)->move(m_offset, 0);
+	if (m_curIndex > m_lastIndex) {
+		m_widgetLst.at(m_lastIndex)->move(m_offset - this->width(), 0);
+    } else if (m_curIndex < m_lastIndex){
+		m_widgetLst.at(m_lastIndex)->move(this->width() + m_offset, 0);
+	}
+}
+
+void AStackWidget::moveAnimationStart()
+{
+	m_moveAnimation->stop();
+	setWidgetsVisible();
+	int startOffset = m_offset;
+	if (m_curIndex > m_lastIndex) {
+		if (startOffset == 0) startOffset = this->width();
+		else startOffset = this->width() - qAbs(startOffset);
+	}
+	else {
+		if (startOffset == 0) startOffset = -this->width();
+		else startOffset = qAbs(startOffset) - this->width();
+	}
+	m_moveAnimation->setDuration(qAbs(startOffset) * m_duration / this->width());
+	m_moveAnimation->setStartValue(startOffset);
+	m_moveAnimation->setEndValue(0);
+	m_moveAnimation->start();
+}
+
+void AStackWidget::setWidgetsVisible()
+{
+	int size = count();
+	for (int i = 0; i < size; i++) {
+		if (m_lastIndex == i || m_curIndex == i)
+			m_widgetLst.at(i)->setVisible(true);
+		else {
+			m_widgetLst.at(i)->setVisible(false);
+		}
+	}
+}
+
+void AStackWidget::onMoveFinished()
+{
+
+}

netfriend/astackwidget/astackwidget.h

@@ -0,0 +1,52 @@
+#include <QWidget>
+
+class QPropertyAnimation;
+class AStackWidget : public QWidget
+{
+	Q_OBJECT
+
+public:
+	AStackWidget(QWidget *parent);
+	~AStackWidget();
+
+signals:
+	void currentChanged(int index);
+	void widgetRemoved(int index);
+
+public:
+	int count() const;
+	int currentIndex() const;
+	int addWidget(QWidget *widget);
+	int indexOf(QWidget *widget) const;
+	int insertWidget(int index, QWidget *widget);
+	
+	QWidget *currentWidget() const;	
+	QWidget *widget(int index) const;
+
+	void removeWidget(QWidget *widget);
+	void setDuration(int duration);
+
+public slots:
+	void setCurrentIndex(int index);
+	void setCurrentWidget(QWidget *widget);
+
+private slots:
+	void onValueChanged(const QVariant &);
+	void onMoveFinished();
+
+private:
+	void moveAnimationStart();
+	void setWidgetsVisible();
+
+protected:
+	void resizeEvent(QResizeEvent *event);
+
+private:
+	int m_offset;
+	int m_curIndex;
+	int m_lastIndex;
+
+	int m_duration;
+	QPropertyAnimation *m_moveAnimation;
+	QList<QWidget *> m_widgetLst;
+};

netfriend/astackwidget/astackwidget.pro

@@ -0,0 +1,16 @@
+QT += core gui
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+greaterThan(QT_MAJOR_VERSION, 5): QT += core5compat
+
+TARGET      = astackwidget
+TEMPLATE    = app
+DESTDIR     = $$PWD/../bin
+CONFIG      += warn_off
+
+SOURCES     += main.cpp
+SOURCES     += astackwidget.cpp
+HEADERS     += astackwidget.h
+
+SOURCES     += frmastackwidget.cpp
+HEADERS     += frmastackwidget.h
+FORMS       += frmastackwidget.ui

netfriend/astackwidget/frmastackwidget.cpp

@@ -0,0 +1,42 @@
+#pragma execution_character_set("utf-8")
+
+#include "FrmAStackWidget.h"
+
+#include <QButtonGroup>
+#include <QLabel>
+
+FrmAStackWidget::FrmAStackWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    ui.setupUi(this);
+
+    QList<QString> colorlst;
+    colorlst << "#1abc9c";
+    colorlst << "#2ecc71";
+    colorlst << "#3498db";
+    colorlst << "#9b59b6";
+    colorlst << "#e74c3c";
+
+    QList<QPushButton *> btnlst;
+    btnlst << ui.pushButton_1;
+    btnlst << ui.pushButton_2;
+    btnlst << ui.pushButton_3;
+    btnlst << ui.pushButton_4;
+    btnlst << ui.pushButton_5;
+
+    QButtonGroup *btnGroup = new QButtonGroup(this);
+#if (QT_VERSION >= QT_VERSION_CHECK(6,0,0))
+    connect(btnGroup, SIGNAL(idClicked(int)), ui.aStackwidget, SLOT(setCurrentIndex(int)));
+#else
+    connect(btnGroup, SIGNAL(buttonClicked(int)), ui.aStackwidget, SLOT(setCurrentIndex(int)));
+#endif
+
+    for (int i = 0; i < 5; i++) {
+        QLabel *label = new QLabel(ui.aStackwidget);
+        label->setStyleSheet(QString("background-color:%1;color:#ffffff;").arg(colorlst.at(i)));
+        label->setText(QString::number(i + 1));
+        label->setAlignment(Qt::AlignCenter);
+        int index = ui.aStackwidget->addWidget(label);
+        btnGroup->addButton(btnlst.at(i), index);
+    }
+}

netfriend/astackwidget/frmastackwidget.h

@@ -0,0 +1,13 @@
+#include <QWidget>
+#include "ui_FrmAStackWidget.h"
+
+class FrmAStackWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    FrmAStackWidget(QWidget *parent = Q_NULLPTR);
+
+private:
+	Ui::FrmAStackWidgetClass ui;
+};

netfriend/astackwidget/frmastackwidget.ui

@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>FrmAStackWidgetClass</class>
+ <widget class="QWidget" name="FrmAStackWidgetClass">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>600</width>
+    <height>400</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>FrmAStackWidget</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <property name="spacing">
+    <number>12</number>
+   </property>
+   <property name="leftMargin">
+    <number>12</number>
+   </property>
+   <property name="topMargin">
+    <number>12</number>
+   </property>
+   <property name="rightMargin">
+    <number>12</number>
+   </property>
+   <property name="bottomMargin">
+    <number>12</number>
+   </property>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QPushButton" name="pushButton_1">
+       <property name="text">
+        <string>PushButton1</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButton_2">
+       <property name="text">
+        <string>PushButton2</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButton_3">
+       <property name="text">
+        <string>PushButton3</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButton_4">
+       <property name="text">
+        <string>PushButton4</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButton_5">
+       <property name="text">
+        <string>PushButton5</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="AStackWidget" name="aStackwidget" native="true">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <customwidgets>
+  <customwidget>
+   <class>AStackWidget</class>
+   <extends>QWidget</extends>
+   <header>astackwidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>

netfriend/astackwidget/main.cpp

@@ -0,0 +1,30 @@
+#pragma execution_character_set("utf-8")
+#include "frmastackwidget.h"
+
+#include <QApplication>
+#include <QTextCodec>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    a.setFont(QFont("Microsoft Yahei", 9));
+
+#if (QT_VERSION <= QT_VERSION_CHECK(5,0,0))
+#if _MSC_VER
+    QTextCodec *codec = QTextCodec::codecForName("gbk");
+#else
+    QTextCodec *codec = QTextCodec::codecForName("utf-8");
+#endif
+    QTextCodec::setCodecForLocale(codec);
+    QTextCodec::setCodecForCStrings(codec);
+    QTextCodec::setCodecForTr(codec);
+#else
+    QTextCodec *codec = QTextCodec::codecForName("utf-8");
+    QTextCodec::setCodecForLocale(codec);
+#endif
+
+    FrmAStackWidget w;
+	w.setWindowTitle(QStringLiteral("动态StackWidget"));
+    w.show();
+    return a.exec();
+}

netfriend/imagecropper/base/imagecropperdialog.h

@@ -0,0 +1,99 @@
+#ifndef IMAGECROPPER_H
+#define IMAGECROPPER_H
+
+#include <QWidget>
+#include <QDialog>
+#include <QPainter>
+#include <QLabel>
+#include <QPixmap>
+#include <QString>
+#include <QMessageBox>
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+#include <QPushButton>
+
+#include "imagecropperlabel.h"
+
+/*******************************************************
+ *  Loacl private class, which do image-cropping
+ *  Used in class ImageCropper
+*******************************************************/
+class ImageCropperDialogPrivate : public QDialog
+{
+    Q_OBJECT
+public:
+    ImageCropperDialogPrivate(const QPixmap &imageIn, QPixmap &outputImage,
+                              int windowWidth, int windowHeight,
+                              CropperShape shape, QSize cropperSize = QSize())
+        : QDialog(0)
+        , outputImage(outputImage)
+    {
+        this->setAttribute(Qt::WA_DeleteOnClose, true);
+        this->setWindowTitle("Image Cropper");
+        this->setMouseTracking(true);
+        this->setModal(true);
+
+        imageLabel = new ImageCropperLabel(windowWidth, windowHeight, this);
+        imageLabel->setCropper(shape, cropperSize);
+        imageLabel->setOutputShape(OutputShape::RECT);
+        imageLabel->setOriginalImage(imageIn);
+        imageLabel->enableOpacity(true);
+
+        QHBoxLayout *btnLayout = new QHBoxLayout();
+        btnOk = new QPushButton("OK", this);
+        btnCancel = new QPushButton("Cancel", this);
+        btnLayout->addStretch();
+        btnLayout->addWidget(btnOk);
+        btnLayout->addWidget(btnCancel);
+
+        QVBoxLayout *mainLayout = new QVBoxLayout(this);
+        mainLayout->addWidget(imageLabel);
+        mainLayout->addLayout(btnLayout);
+
+        connect(btnOk, &QPushButton::clicked, this, [this]() {
+            this->outputImage = this->imageLabel->getCroppedImage();
+            this->close();
+        });
+        connect(btnCancel, &QPushButton::clicked, this, [this]() {
+            this->outputImage = QPixmap();
+            this->close();
+        });
+    }
+
+private:
+    ImageCropperLabel *imageLabel;
+    QPushButton *btnOk;
+    QPushButton *btnCancel;
+    QPixmap &outputImage;
+};
+
+/*******************************************************************
+ *  class ImageCropperDialog
+ *      create a instane of class ImageCropperDialogPrivate
+ *      and get cropped image from the instance(after closing)
+********************************************************************/
+class ImageCropperDialog : QObject
+{
+public:
+    static QPixmap getCroppedImage(const QString &filename, int windowWidth, int windowHeight,
+                                   CropperShape cropperShape, QSize crooperSize = QSize())
+    {
+        QPixmap inputImage;
+        QPixmap outputImage;
+
+        if (!inputImage.load(filename)) {
+            QMessageBox::critical(0, "Error", "Load image failed!", QMessageBox::Ok);
+            return outputImage;
+        }
+
+        ImageCropperDialogPrivate *imageCropperDo =
+            new ImageCropperDialogPrivate(inputImage, outputImage,
+                                          windowWidth, windowHeight,
+                                          cropperShape, crooperSize);
+        imageCropperDo->exec();
+
+        return outputImage;
+    }
+};
+
+#endif // IMAGECROPPER_H

netfriend/imagecropper/base/imagecropperlabel.cpp

@@ -0,0 +1,714 @@
+#include "imagecropperlabel.h"
+
+#include <QPainter>
+#include <QPainterPath>
+#include <QMouseEvent>
+#include <QDebug>
+#include <QBitmap>
+
+ImageCropperLabel::ImageCropperLabel(int width, int height, QWidget* parent) :
+         QLabel(parent)
+{
+    this->setFixedSize(width, height);
+    this->setAlignment(Qt::AlignCenter);
+    this->setMouseTracking(true);
+
+    borderPen.setWidth(1);
+    borderPen.setColor(Qt::white);
+    borderPen.setDashPattern(QVector<qreal>() << 3 << 3 << 3 << 3);
+}
+
+void ImageCropperLabel::setOriginalImage(const QPixmap &pixmap) {
+    originalImage = pixmap;
+
+    int imgWidth = pixmap.width();
+    int imgHeight = pixmap.height();
+    int labelWidth = this->width();
+    int labelHeight = this->height();
+    int imgWidthInLabel;
+    int imgHeightInLabel;
+
+    if (imgWidth * labelHeight < imgHeight * labelWidth) {
+        scaledRate = labelHeight / double(imgHeight);
+        imgHeightInLabel = labelHeight;
+        imgWidthInLabel = int(scaledRate * imgWidth);
+        imageRect.setRect((labelWidth - imgWidthInLabel) / 2, 0,
+                          imgWidthInLabel, imgHeightInLabel);
+    }
+    else {
+        scaledRate = labelWidth / double(imgWidth);
+        imgWidthInLabel = labelWidth;
+        imgHeightInLabel = int(scaledRate * imgHeight);
+        imageRect.setRect(0, (labelHeight - imgHeightInLabel) / 2,
+                          imgWidthInLabel, imgHeightInLabel);
+    }
+
+    tempImage = originalImage.scaled(imgWidthInLabel, imgHeightInLabel,
+                                     Qt::KeepAspectRatio, Qt::SmoothTransformation);
+    this->setPixmap(tempImage);
+
+    if (cropperShape >= CropperShape::FIXED_RECT) {
+        cropperRect.setWidth(int(cropperRect_.width() * scaledRate));
+        cropperRect.setHeight(int(cropperRect_.height() * scaledRate));
+    }
+    resetCropperPos();
+}
+
+
+/*****************************************
+ * set cropper's shape (and size)
+*****************************************/
+void ImageCropperLabel::setRectCropper() {
+    cropperShape = CropperShape::RECT;
+    resetCropperPos();
+}
+
+void ImageCropperLabel::setSquareCropper() {
+    cropperShape = CropperShape::SQUARE;
+    resetCropperPos();
+}
+
+void ImageCropperLabel::setEllipseCropper() {
+    cropperShape = CropperShape::ELLIPSE;
+    resetCropperPos();
+}
+
+void ImageCropperLabel::setCircleCropper() {
+    cropperShape = CropperShape::CIRCLE;
+    resetCropperPos();
+}
+
+void ImageCropperLabel::setFixedRectCropper(QSize size) {
+    cropperShape = CropperShape::FIXED_RECT;
+    cropperRect_.setSize(size);
+    resetCropperPos();
+}
+
+void ImageCropperLabel::setFixedEllipseCropper(QSize size) {
+    cropperShape = CropperShape::FIXED_ELLIPSE;
+    cropperRect_.setSize(size);
+    resetCropperPos();
+}
+
+// not recommended
+void ImageCropperLabel::setCropper(CropperShape shape, QSize size) {
+    cropperShape = shape;
+    cropperRect_.setSize(size);
+    resetCropperPos();
+}
+
+/*****************************************************************************
+     * Set cropper's fixed size
+    *****************************************************************************/
+void ImageCropperLabel::setCropperFixedSize(int fixedWidth, int fixedHeight) {
+    cropperRect_.setSize(QSize(fixedWidth, fixedHeight));
+    resetCropperPos();
+}
+
+void ImageCropperLabel::setCropperFixedWidth(int fixedWidth) {
+    cropperRect_.setWidth(fixedWidth);
+    resetCropperPos();
+}
+
+void ImageCropperLabel::setCropperFixedHeight(int fixedHeight) {
+    cropperRect_.setHeight(fixedHeight);
+    resetCropperPos();
+}
+
+/**********************************************
+ * Move cropper to the center of the image
+ * And resize to default
+**********************************************/
+void ImageCropperLabel::resetCropperPos() {
+    int labelWidth = this->width();
+    int labelHeight = this->height();
+
+    if (cropperShape == CropperShape::FIXED_RECT || cropperShape == CropperShape::FIXED_ELLIPSE) {
+        cropperRect.setWidth(int(cropperRect_.width() * scaledRate));
+        cropperRect.setHeight(int(cropperRect_.height() * scaledRate));
+    }
+
+    switch (cropperShape) {
+        case CropperShape::UNDEFINED:
+            break;
+        case CropperShape::FIXED_RECT:
+        case CropperShape::FIXED_ELLIPSE: {
+            cropperRect.setRect((labelWidth - cropperRect.width()) / 2,
+                             (labelHeight - cropperRect.height()) / 2,
+                             cropperRect.width(), cropperRect.height());
+            break;
+        }
+        case CropperShape::RECT:
+        case CropperShape::SQUARE:
+        case CropperShape::ELLIPSE:
+        case CropperShape::CIRCLE: {
+            int imgWidth = tempImage.width();
+            int imgHeight = tempImage.height();
+            int edge = int((imgWidth > imgHeight ? imgHeight : imgWidth) * 3 / 4.0);
+            cropperRect.setRect((labelWidth - edge) / 2, (labelHeight - edge) / 2, edge, edge);
+            break;
+        }
+    }
+}
+
+QPixmap ImageCropperLabel::getCroppedImage() {
+    return getCroppedImage(this->outputShape);
+}
+
+QPixmap ImageCropperLabel::getCroppedImage(OutputShape shape) {
+    int startX = int((cropperRect.left() - imageRect.left()) / scaledRate);
+    int startY = int((cropperRect.top() - imageRect.top()) / scaledRate);
+    int croppedWidth = int(cropperRect.width() / scaledRate);
+    int croppedHeight = int(cropperRect.height() / scaledRate);
+
+    QPixmap resultImage(croppedWidth, croppedHeight);
+    resultImage = originalImage.copy(startX, startY, croppedWidth, croppedHeight);
+
+    // Set ellipse mask (cut to ellipse shape)
+    if (shape == OutputShape::ELLIPSE) {
+        QSize size(croppedWidth, croppedHeight);
+        QBitmap mask(size);
+        QPainter painter(&mask);
+        painter.setRenderHint(QPainter::Antialiasing);
+        painter.setRenderHint(QPainter::SmoothPixmapTransform);
+        painter.fillRect(0, 0, size.width(), size.height(), Qt::white);
+        painter.setBrush(QColor(0, 0, 0));
+        painter.drawRoundedRect(0, 0, size.width(), size.height(), 99, 99);
+        resultImage.setMask(mask);
+    }
+
+    return resultImage;
+}
+
+
+void ImageCropperLabel::paintEvent(QPaintEvent *event) {
+    // Draw original image
+    QLabel::paintEvent(event);
+
+    // Draw cropper and set some effects
+    switch (cropperShape) {
+        case CropperShape::UNDEFINED:
+            break;
+        case CropperShape::FIXED_RECT:
+            drawRectOpacity();
+            break;
+        case CropperShape::FIXED_ELLIPSE:
+            drawEllipseOpacity();
+            break;
+        case CropperShape::RECT:
+            drawRectOpacity();
+            drawSquareEdge(!ONLY_FOUR_CORNERS);
+            break;
+        case CropperShape::SQUARE:
+            drawRectOpacity();
+            drawSquareEdge(ONLY_FOUR_CORNERS);
+            break;
+        case CropperShape::ELLIPSE:
+            drawEllipseOpacity();
+            drawSquareEdge(!ONLY_FOUR_CORNERS);
+            break;
+        case CropperShape::CIRCLE:
+            drawEllipseOpacity();
+            drawSquareEdge(ONLY_FOUR_CORNERS);
+            break;
+    }
+
+    // Draw cropper rect
+    if (isShowRectBorder) {
+        QPainter painter(this);
+        painter.setPen(borderPen);
+        painter.drawRect(cropperRect);
+    }
+}
+
+void ImageCropperLabel::drawSquareEdge(bool onlyFourCorners) {
+    if (!isShowDragSquare)
+        return;
+
+    // Four corners
+    drawFillRect(cropperRect.topLeft(), dragSquareEdge, dragSquareColor);
+    drawFillRect(cropperRect.topRight(), dragSquareEdge, dragSquareColor);
+    drawFillRect(cropperRect.bottomLeft(), dragSquareEdge, dragSquareColor);
+    drawFillRect(cropperRect.bottomRight(), dragSquareEdge, dragSquareColor);
+
+    // Four edges
+    if (!onlyFourCorners) {
+        int centralX = cropperRect.left() + cropperRect.width() / 2;
+        int centralY = cropperRect.top() + cropperRect.height() / 2;
+        drawFillRect(QPoint(cropperRect.left(), centralY), dragSquareEdge, dragSquareColor);
+        drawFillRect(QPoint(centralX, cropperRect.top()), dragSquareEdge, dragSquareColor);
+        drawFillRect(QPoint(cropperRect.right(), centralY), dragSquareEdge, dragSquareColor);
+        drawFillRect(QPoint(centralX, cropperRect.bottom()), dragSquareEdge, dragSquareColor);
+    }
+}
+
+void ImageCropperLabel::drawFillRect(QPoint centralPoint, int edge, QColor color) {
+    QRect rect(centralPoint.x() - edge / 2, centralPoint.y() - edge / 2, edge, edge);
+    QPainter painter(this);
+    painter.fillRect(rect, color);
+}
+
+// Opacity effect
+void ImageCropperLabel::drawOpacity(const QPainterPath& path) {
+    QPainter painterOpac(this);
+    painterOpac.setOpacity(opacity);
+    painterOpac.fillPath(path, QBrush(Qt::black));
+}
+
+void ImageCropperLabel::drawRectOpacity() {
+    if (isShowOpacityEffect) {
+        QPainterPath p1, p2, p;
+        p1.addRect(imageRect);
+        p2.addRect(cropperRect);
+        p = p1.subtracted(p2);
+        drawOpacity(p);
+    }
+}
+
+void ImageCropperLabel::drawEllipseOpacity() {
+    if (isShowOpacityEffect) {
+        QPainterPath p1, p2, p;
+        p1.addRect(imageRect);
+        p2.addEllipse(cropperRect);
+        p = p1.subtracted(p2);
+        drawOpacity(p);
+    }
+}
+
+bool ImageCropperLabel::isPosNearDragSquare(const QPoint& pt1, const QPoint& pt2) {
+    return abs(pt1.x() - pt2.x()) * 2 <= dragSquareEdge
+           && abs(pt1.y() - pt2.y()) * 2 <= dragSquareEdge;
+}
+
+int ImageCropperLabel::getPosInCropperRect(const QPoint &pt) {
+    if (isPosNearDragSquare(pt, QPoint(cropperRect.right(), cropperRect.center().y())))
+        return RECT_RIGHT;
+    if (isPosNearDragSquare(pt, cropperRect.bottomRight()))
+        return RECT_BOTTOM_RIGHT;
+    if (isPosNearDragSquare(pt, QPoint(cropperRect.center().x(), cropperRect.bottom())))
+        return RECT_BOTTOM;
+    if (isPosNearDragSquare(pt, cropperRect.bottomLeft()))
+        return RECT_BOTTOM_LEFT;
+    if (isPosNearDragSquare(pt, QPoint(cropperRect.left(), cropperRect.center().y())))
+        return RECT_LEFT;
+    if (isPosNearDragSquare(pt, cropperRect.topLeft()))
+        return RECT_TOP_LEFT;
+    if (isPosNearDragSquare(pt, QPoint(cropperRect.center().x(), cropperRect.top())))
+        return RECT_TOP;
+    if (isPosNearDragSquare(pt, cropperRect.topRight()))
+        return RECT_TOP_RIGHT;
+    if (cropperRect.contains(pt, true))
+        return RECT_INSIDE;
+    return RECT_OUTSIZD;
+}
+
+/*************************************************
+ *
+ *  Change mouse cursor type
+ *      Arrow, SizeHor, SizeVer, etc...
+ *
+*************************************************/
+
+void ImageCropperLabel::changeCursor() {
+    switch (cursorPosInCropperRect) {
+        case RECT_OUTSIZD:
+            setCursor(Qt::ArrowCursor);
+            break;
+        case RECT_BOTTOM_RIGHT: {
+            switch (cropperShape) {
+            case CropperShape::SQUARE:
+            case CropperShape::CIRCLE:
+            case CropperShape::RECT:
+            case CropperShape::ELLIPSE:
+                setCursor(Qt::SizeFDiagCursor);
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+        case RECT_RIGHT: {
+            switch (cropperShape) {
+            case CropperShape::RECT:
+            case CropperShape::ELLIPSE:
+                setCursor(Qt::SizeHorCursor);
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+        case RECT_BOTTOM: {
+            switch (cropperShape) {
+            case CropperShape::RECT:
+            case CropperShape::ELLIPSE:
+                setCursor(Qt::SizeVerCursor);
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+        case RECT_BOTTOM_LEFT: {
+            switch (cropperShape) {
+            case CropperShape::RECT:
+            case CropperShape::ELLIPSE:
+            case CropperShape::SQUARE:
+            case CropperShape::CIRCLE:
+                setCursor(Qt::SizeBDiagCursor);
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+        case RECT_LEFT: {
+            switch (cropperShape) {
+            case CropperShape::RECT:
+            case CropperShape::ELLIPSE:
+                setCursor(Qt::SizeHorCursor);
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+        case RECT_TOP_LEFT: {
+            switch (cropperShape) {
+            case CropperShape::RECT:
+            case CropperShape::ELLIPSE:
+            case CropperShape::SQUARE:
+            case CropperShape::CIRCLE:
+                setCursor(Qt::SizeFDiagCursor);
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+        case RECT_TOP: {
+            switch (cropperShape) {
+            case CropperShape::RECT:
+            case CropperShape::ELLIPSE:
+                setCursor(Qt::SizeVerCursor);
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+        case RECT_TOP_RIGHT: {
+            switch (cropperShape) {
+            case CropperShape::SQUARE:
+            case CropperShape::CIRCLE:
+            case CropperShape::RECT:
+            case CropperShape::ELLIPSE:
+                setCursor(Qt::SizeBDiagCursor);
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+        case RECT_INSIDE: {
+            setCursor(Qt::SizeAllCursor);
+            break;
+        }
+    }
+}
+
+/*****************************************************
+ *
+ *  Mouse Events
+ *
+*****************************************************/
+
+void ImageCropperLabel::mousePressEvent(QMouseEvent *e) {
+    currPos = lastPos = e->pos();
+    isLButtonPressed = true;
+}
+
+void ImageCropperLabel::mouseMoveEvent(QMouseEvent *e) {
+    currPos = e->pos();
+    if (!isCursorPosCalculated) {
+        cursorPosInCropperRect = getPosInCropperRect(currPos);
+        changeCursor();
+    }
+
+    if (!isLButtonPressed)
+        return;
+    if (!imageRect.contains(currPos))
+        return;
+
+    isCursorPosCalculated = true;
+
+    int xOffset = currPos.x() - lastPos.x();
+    int yOffset = currPos.y() - lastPos.y();
+    lastPos = currPos;
+
+    int disX = 0;
+    int disY = 0;
+
+    // Move cropper
+    switch (cursorPosInCropperRect) {
+        case RECT_OUTSIZD:
+            break;
+        case RECT_BOTTOM_RIGHT: {
+            disX = currPos.x() - cropperRect.left();
+            disY = currPos.y() - cropperRect.top();
+            switch (cropperShape) {
+                case CropperShape::UNDEFINED:
+                case CropperShape::FIXED_RECT:
+                case CropperShape::FIXED_ELLIPSE:
+                    break;
+                case CropperShape::SQUARE:
+                case CropperShape::CIRCLE:
+                    setCursor(Qt::SizeFDiagCursor);
+                    if (disX >= cropperMinimumWidth && disY >= cropperMinimumHeight) {
+                        if (disX > disY && cropperRect.top() + disX <= imageRect.bottom()) {
+                            cropperRect.setRight(currPos.x());
+                            cropperRect.setBottom(cropperRect.top() + disX);
+                            emit croppedImageChanged();
+                        }
+                        else if (disX <= disY && cropperRect.left() + disY <= imageRect.right()) {
+                            cropperRect.setBottom(currPos.y());
+                            cropperRect.setRight(cropperRect.left() + disY);
+                            emit croppedImageChanged();
+                        }
+                    }
+                    break;
+                case CropperShape::RECT:
+                case CropperShape::ELLIPSE:
+                    setCursor(Qt::SizeFDiagCursor);
+                    if (disX >= cropperMinimumWidth) {
+                        cropperRect.setRight(currPos.x());
+                        emit croppedImageChanged();
+                    }
+                    if (disY >= cropperMinimumHeight) {
+                        cropperRect.setBottom(currPos.y());
+                        emit croppedImageChanged();
+                    }
+                    break;
+            }
+            break;
+        }
+        case RECT_RIGHT: {
+            disX = currPos.x() - cropperRect.left();
+            switch (cropperShape) {
+                case CropperShape::UNDEFINED:
+                case CropperShape::FIXED_RECT:
+                case CropperShape::FIXED_ELLIPSE:
+                case CropperShape::SQUARE:
+                case CropperShape::CIRCLE:
+                    break;
+                case CropperShape::RECT:
+                case CropperShape::ELLIPSE:
+                    if (disX >= cropperMinimumWidth) {
+                        cropperRect.setRight(currPos.x());
+                        emit croppedImageChanged();
+                    }
+                    break;
+            }
+            break;
+        }
+        case RECT_BOTTOM: {
+            disY = currPos.y() - cropperRect.top();
+            switch (cropperShape) {
+                case CropperShape::UNDEFINED:
+                case CropperShape::FIXED_RECT:
+                case CropperShape::FIXED_ELLIPSE:
+                case CropperShape::SQUARE:
+                case CropperShape::CIRCLE:
+                    break;
+                case CropperShape::RECT:
+                case CropperShape::ELLIPSE:
+                    if (disY >= cropperMinimumHeight) {
+                        cropperRect.setBottom(cropperRect.bottom() + yOffset);
+                        emit croppedImageChanged();
+                    }
+                    break;
+            }
+            break;
+        }
+        case RECT_BOTTOM_LEFT: {
+            disX = cropperRect.right() - currPos.x();
+            disY = currPos.y() - cropperRect.top();
+            switch (cropperShape) {
+                case CropperShape::UNDEFINED:
+                    break;
+                case CropperShape::FIXED_RECT:
+                case CropperShape::FIXED_ELLIPSE:
+                case CropperShape::RECT:
+                case CropperShape::ELLIPSE:
+                    if (disX >= cropperMinimumWidth) {
+                        cropperRect.setLeft(currPos.x());
+                        emit croppedImageChanged();
+                    }
+                    if (disY >= cropperMinimumHeight) {
+                        cropperRect.setBottom(currPos.y());
+                        emit croppedImageChanged();
+                    }
+                    break;
+                case CropperShape::SQUARE:
+                case CropperShape::CIRCLE:
+                    if (disX >= cropperMinimumWidth && disY >= cropperMinimumHeight) {
+                        if (disX > disY && cropperRect.top() + disX <= imageRect.bottom()) {
+                            cropperRect.setLeft(currPos.x());
+                            cropperRect.setBottom(cropperRect.top() + disX);
+                            emit croppedImageChanged();
+                        }
+                        else if (disX <= disY && cropperRect.right() - disY >= imageRect.left()) {
+                            cropperRect.setBottom(currPos.y());
+                            cropperRect.setLeft(cropperRect.right() - disY);
+                            emit croppedImageChanged();
+                        }
+                    }
+                    break;
+            }
+            break;
+        }
+        case RECT_LEFT: {
+            disX = cropperRect.right() - currPos.x();
+            switch (cropperShape) {
+                case CropperShape::UNDEFINED:
+                case CropperShape::FIXED_RECT:
+                case CropperShape::FIXED_ELLIPSE:
+                case CropperShape::SQUARE:
+                case CropperShape::CIRCLE:
+                    break;
+                case CropperShape::RECT:
+                case CropperShape::ELLIPSE:
+                    if (disX >= cropperMinimumHeight) {
+                        cropperRect.setLeft(cropperRect.left() + xOffset);
+                        emit croppedImageChanged();
+                    }
+                    break;
+            }
+            break;
+        }
+        case RECT_TOP_LEFT: {
+            disX = cropperRect.right() - currPos.x();
+            disY = cropperRect.bottom() - currPos.y();
+            switch (cropperShape) {
+                case CropperShape::UNDEFINED:
+                case CropperShape::FIXED_RECT:
+                case CropperShape::FIXED_ELLIPSE:
+                    break;
+                case CropperShape::RECT:
+                case CropperShape::ELLIPSE:
+                    if (disX >= cropperMinimumWidth) {
+                        cropperRect.setLeft(currPos.x());
+                        emit croppedImageChanged();
+                    }
+                    if (disY >= cropperMinimumHeight) {
+                        cropperRect.setTop(currPos.y());
+                        emit croppedImageChanged();
+                    }
+                    break;
+                case CropperShape::SQUARE:
+                case CropperShape::CIRCLE:
+                    if (disX >= cropperMinimumWidth && disY >= cropperMinimumHeight) {
+                        if (disX > disY && cropperRect.bottom() - disX >= imageRect.top()) {
+                            cropperRect.setLeft(currPos.x());
+                            cropperRect.setTop(cropperRect.bottom() - disX);
+                            emit croppedImageChanged();
+                        }
+                        else if (disX <= disY && cropperRect.right() - disY >= imageRect.left()) {
+                            cropperRect.setTop(currPos.y());
+                            cropperRect.setLeft(cropperRect.right() - disY);
+                            emit croppedImageChanged();
+                        }
+                    }
+                    break;
+            }
+            break;
+        }
+        case RECT_TOP: {
+            disY = cropperRect.bottom() - currPos.y();
+            switch (cropperShape) {
+                case CropperShape::UNDEFINED:
+                case CropperShape::FIXED_RECT:
+                case CropperShape::FIXED_ELLIPSE:
+                case CropperShape::SQUARE:
+                case CropperShape::CIRCLE:
+                    break;
+                case CropperShape::RECT:
+                case CropperShape::ELLIPSE:
+                    if (disY >= cropperMinimumHeight) {
+                        cropperRect.setTop(cropperRect.top() + yOffset);
+                        emit croppedImageChanged();
+                    }
+                    break;
+            }
+            break;
+        }
+        case RECT_TOP_RIGHT: {
+            disX = currPos.x() - cropperRect.left();
+            disY = cropperRect.bottom() - currPos.y();
+            switch (cropperShape) {
+                case CropperShape::UNDEFINED:
+                case CropperShape::FIXED_RECT:
+                case CropperShape::FIXED_ELLIPSE:
+                    break;
+                case CropperShape::RECT:
+                case CropperShape::ELLIPSE:
+                    if (disX >= cropperMinimumWidth) {
+                        cropperRect.setRight(currPos.x());
+                        emit croppedImageChanged();
+                    }
+                    if (disY >= cropperMinimumHeight) {
+                        cropperRect.setTop(currPos.y());
+                        emit croppedImageChanged();
+                    }
+                    break;
+                case CropperShape::SQUARE:
+                case CropperShape::CIRCLE:
+                    if (disX >= cropperMinimumWidth && disY >= cropperMinimumHeight) {
+                        if (disX < disY && cropperRect.left() + disY <= imageRect.right()) {
+                            cropperRect.setTop(currPos.y());
+                            cropperRect.setRight(cropperRect.left() + disY);
+                            emit croppedImageChanged();
+                        }
+                        else if (disX >= disY && cropperRect.bottom() - disX >= imageRect.top()) {
+                            cropperRect.setRight(currPos.x());
+                            cropperRect.setTop(cropperRect.bottom() - disX);
+                            emit croppedImageChanged();
+                        }
+                    }
+                    break;
+            }
+            break;
+        }
+        case RECT_INSIDE: {
+            // Make sure the cropperRect is entirely inside the imageRecct
+            if (xOffset > 0) {
+                if (cropperRect.right() + xOffset > imageRect.right())
+                    xOffset = 0;
+            }
+            else if (xOffset < 0) {
+                if (cropperRect.left() + xOffset < imageRect.left())
+                    xOffset = 0;
+            }
+            if (yOffset > 0) {
+                if (cropperRect.bottom() + yOffset > imageRect.bottom())
+                    yOffset = 0;
+            }
+            else if (yOffset < 0) {
+                if (cropperRect.top() + yOffset < imageRect.top())
+                    yOffset = 0;
+            }
+            cropperRect.moveTo(cropperRect.left() + xOffset, cropperRect.top() + yOffset);
+            emit croppedImageChanged();
+        }
+        break;
+    }
+
+    repaint();
+}
+
+void ImageCropperLabel::mouseReleaseEvent(QMouseEvent *) {
+    isLButtonPressed = false;
+    isCursorPosCalculated = false;
+    setCursor(Qt::ArrowCursor);
+}
+

netfriend/imagecropper/base/imagecropperlabel.h

@@ -0,0 +1,168 @@
+#ifndef IMAGECROPPERLABEL_H
+#define IMAGECROPPERLABEL_H
+
+#include <QLabel>
+#include <QPixmap>
+#include <QPen>
+
+enum class CropperShape {
+    UNDEFINED = 0,
+    RECT = 1,
+    SQUARE = 2,
+    FIXED_RECT = 3,
+    ELLIPSE = 4,
+    CIRCLE = 5,
+    FIXED_ELLIPSE = 6
+};
+
+enum class OutputShape {
+    RECT = 0,
+    ELLIPSE = 1
+};
+
+enum class SizeType {
+    fixedSize = 0,
+    fitToMaxWidth = 1,
+    fitToMaxHeight = 2,
+    fitToMaxWidthHeight = 3,
+};
+
+class ImageCropperLabel : public QLabel
+{
+    Q_OBJECT
+public:
+    ImageCropperLabel(int width, int height, QWidget *parent);
+
+    void setOriginalImage(const QPixmap &pixmap);
+    void setOutputShape(OutputShape shape) { outputShape = shape; }
+    QPixmap getCroppedImage();
+    QPixmap getCroppedImage(OutputShape shape);
+
+    /*****************************************
+     * Set cropper's shape
+    *****************************************/
+    void setRectCropper();
+    void setSquareCropper();
+    void setEllipseCropper();
+    void setCircleCropper();
+    void setFixedRectCropper(QSize size);
+    void setFixedEllipseCropper(QSize size);
+    void setCropper(CropperShape shape, QSize size); // not recommended
+
+    /*****************************************************************************
+     * Set cropper's fixed size
+    *****************************************************************************/
+    void setCropperFixedSize(int fixedWidth, int fixedHeight);
+    void setCropperFixedWidth(int fixedWidht);
+    void setCropperFixedHeight(int fixedHeight);
+
+    /*****************************************************************************
+     * Set cropper's minimum size
+     * default: the twice of minimum of the edge lenght of drag square
+    *****************************************************************************/
+    void setCropperMinimumSize(int minWidth, int minHeight)
+    {
+        cropperMinimumWidth = minWidth;
+        cropperMinimumHeight = minHeight;
+    }
+    void setCropperMinimumWidth(int minWidth) { cropperMinimumWidth = minWidth; }
+    void setCropperMinimumHeight(int minHeight) { cropperMinimumHeight = minHeight; }
+
+    /*************************************************
+     * Set the size, color, visibility of rectangular border
+    *************************************************/
+    void setShowRectBorder(bool show) { isShowRectBorder = show; }
+    QPen getBorderPen() { return borderPen; }
+    void setBorderPen(const QPen &pen) { borderPen = pen; }
+
+    /*************************************************
+     * Set the size, color of drag square
+    *************************************************/
+    void setShowDragSquare(bool show) { isShowDragSquare = show; }
+    void setDragSquareEdge(int edge) { dragSquareEdge = (edge >= 3 ? edge : 3); }
+    void setDragSquareColor(const QColor &color) { dragSquareColor = color; }
+
+    /*****************************************
+     *  Opacity Effect
+    *****************************************/
+    void enableOpacity(bool b = true) { isShowOpacityEffect = b; }
+    void setOpacity(double newOpacity) { opacity = newOpacity; }
+
+signals:
+    void croppedImageChanged();
+
+protected:
+    /*****************************************
+     * Event
+    *****************************************/
+    virtual void paintEvent(QPaintEvent *event) override;
+    virtual void mousePressEvent(QMouseEvent *e) override;
+    virtual void mouseMoveEvent(QMouseEvent *e) override;
+    virtual void mouseReleaseEvent(QMouseEvent *e) override;
+
+private:
+    /***************************************
+     * Draw shapes
+    ***************************************/
+    void drawFillRect(QPoint centralPoint, int edge, QColor color);
+    void drawRectOpacity();
+    void drawEllipseOpacity();
+    void drawOpacity(const QPainterPath &path); // shadow effect
+    void drawSquareEdge(bool onlyFourCorners);
+
+    /***************************************
+     * Other utility methods
+    ***************************************/
+    int getPosInCropperRect(const QPoint &pt);
+    bool isPosNearDragSquare(const QPoint &pt1, const QPoint &pt2);
+    void resetCropperPos();
+    void changeCursor();
+
+    enum {
+        RECT_OUTSIZD = 0,
+        RECT_INSIDE = 1,
+        RECT_TOP_LEFT,
+        RECT_TOP,
+        RECT_TOP_RIGHT,
+        RECT_RIGHT,
+        RECT_BOTTOM_RIGHT,
+        RECT_BOTTOM,
+        RECT_BOTTOM_LEFT,
+        RECT_LEFT
+    };
+
+    const bool ONLY_FOUR_CORNERS = true;
+
+private:
+    QPixmap originalImage;
+    QPixmap tempImage;
+
+    bool isShowRectBorder = true;
+    QPen borderPen;
+
+    CropperShape cropperShape = CropperShape::UNDEFINED;
+    OutputShape outputShape = OutputShape::RECT;
+
+    QRect imageRect; // the whole image area in the label (not real size)
+    QRect cropperRect; // a rectangle frame to choose image area (not real size)
+    QRect cropperRect_; // cropper rect (real size)
+    double scaledRate = 1.0;
+
+    bool isLButtonPressed = false;
+    bool isCursorPosCalculated = false;
+    int cursorPosInCropperRect = RECT_OUTSIZD;
+    QPoint lastPos;
+    QPoint currPos;
+
+    bool isShowDragSquare = true;
+    int dragSquareEdge = 8;
+    QColor dragSquareColor = Qt::white;
+
+    int cropperMinimumWidth = dragSquareEdge * 2;
+    int cropperMinimumHeight = dragSquareEdge * 2;
+
+    bool isShowOpacityEffect = false;
+    double opacity = 0.6;
+};
+
+#endif // IMAGECROPPERLABEL_H

netfriend/imagecropper/example/imagecropperdemo.cpp

@@ -0,0 +1,415 @@
+#include "imagecropperdemo.h"
+#include <QFormLayout>
+#include <QColorDialog>
+#include <QVBoxLayout>
+#include <QFileDialog>
+#include <QMessageBox>
+
+ImageCropperDemo::ImageCropperDemo(QWidget* parent) :
+    QDialog(parent)
+{
+    setupLayout();
+    init();
+
+    this->setAttribute(Qt::WA_DeleteOnClose, true);
+    this->setWindowTitle("Image Cropper Demo");
+}
+
+
+void ImageCropperDemo::setupLayout() {
+    imgCropperLabel = new ImageCropperLabel(600, 500, this);
+    imgCropperLabel->setFrameStyle(1);
+
+    comboOutputShape = new QComboBox(this);
+    comboCropperShape = new QComboBox(this);
+
+    labelPreviewImage = new QLabel(this);
+
+    editOriginalImagePath = new QLineEdit(this);
+    btnChooseOriginalImagePath = new QPushButton(this);
+    QHBoxLayout* hOriginalImagePathLayout = new QHBoxLayout();
+    hOriginalImagePathLayout->addWidget(editOriginalImagePath);
+    hOriginalImagePathLayout->addWidget(btnChooseOriginalImagePath);
+
+    editCropperFixedWidth = new QLineEdit(this);
+    editCropperFixedHeight = new QLineEdit(this);
+    QHBoxLayout* hCropperFixedSizeLayout = new QHBoxLayout();
+    hCropperFixedSizeLayout->addWidget(editCropperFixedWidth);
+    hCropperFixedSizeLayout->addWidget(editCropperFixedHeight);
+
+    editCropperMinWidth = new QLineEdit("8", this);
+    editCropperMinHeight = new QLineEdit("8", this);
+    QHBoxLayout* hCropperMinSizeLayout = new QHBoxLayout();
+    hCropperMinSizeLayout->addWidget(editCropperMinWidth);
+    hCropperMinSizeLayout->addWidget(editCropperMinHeight);
+
+    checkEnableOpacity = new QCheckBox(this);
+    sliderOpacity = new QSlider(Qt::Horizontal, this);
+
+    checkShowDragSquare = new QCheckBox(this);
+    editDragSquareEdge = new QLineEdit("8", this);
+    checkShowRectBorder = new QCheckBox(this);
+
+    labelRectBorderColor = new QLabel(this);
+    btnChooseRectBorderCorlor = new QPushButton(this);
+    QHBoxLayout* hRectBorderColorLayout = new QHBoxLayout();
+    hRectBorderColorLayout->addWidget(labelRectBorderColor);
+    hRectBorderColorLayout->addWidget(btnChooseRectBorderCorlor);
+
+    labelDragSquareColor = new QLabel(this);
+    btnChooseDragSquareColor = new QPushButton(this);
+    QHBoxLayout* hDragSquareColorLayout = new QHBoxLayout();
+    hDragSquareColorLayout->addWidget(labelDragSquareColor);
+    hDragSquareColorLayout->addWidget(btnChooseDragSquareColor);
+
+    QFormLayout* formLayout1 = new QFormLayout();
+    formLayout1->addRow(new QLabel("Preview:"), labelPreviewImage);
+    formLayout1->addRow(new QLabel("OriginalImage:", this), hOriginalImagePathLayout);
+    formLayout1->addRow(new QLabel("OutputShape:", this), comboOutputShape);
+    formLayout1->addRow(new QLabel("CropperShape:", this), comboCropperShape);
+    formLayout1->addRow(new QLabel("FixedSize:", this), hCropperFixedSizeLayout);
+    formLayout1->addRow(new QLabel("MinimumSize:", this), hCropperMinSizeLayout);
+
+    QFormLayout* formLayout2 = new QFormLayout();
+    formLayout2->addRow(new QLabel("EnableOpacity:", this), checkEnableOpacity);
+    formLayout2->addRow(new QLabel("Opacity:", this), sliderOpacity);
+
+    QFormLayout* formLayout3 = new QFormLayout();
+    formLayout3->addRow(new QLabel("ShowDragSquare:", this), checkShowDragSquare);
+    formLayout3->addRow(new QLabel("DragSquareEdge:", this), editDragSquareEdge);
+    formLayout3->addRow(new QLabel("DragSquareColor:", this), hDragSquareColorLayout);
+
+    QFormLayout* formLayout4 = new QFormLayout();
+    formLayout4->addRow(new QLabel("ShowRectBorder:", this), checkShowRectBorder);
+    formLayout4->addRow(new QLabel("RectBorderColor:", this), hRectBorderColorLayout);
+
+    btnSavePreview = new QPushButton("Save", this);
+    btnQuit = new QPushButton("Quit", this);
+    QHBoxLayout* btnLayout = new QHBoxLayout();
+    btnLayout->addStretch();
+    btnLayout->addWidget(btnSavePreview);
+    btnLayout->addStretch();
+    btnLayout->addWidget(btnQuit);
+    btnLayout->addStretch();
+
+    QVBoxLayout* vLayout = new QVBoxLayout();
+    vLayout->addLayout(formLayout1);
+    vLayout->addStretch();
+    vLayout->addLayout(formLayout2);
+    vLayout->addStretch();
+    vLayout->addLayout(formLayout3);
+    vLayout->addStretch();
+    vLayout->addLayout(formLayout4);
+    vLayout->addStretch();
+    vLayout->addLayout(btnLayout);
+
+    mainLayout = new QHBoxLayout(this);
+    mainLayout->addWidget(imgCropperLabel);
+    mainLayout->addLayout(vLayout);
+}
+
+void ImageCropperDemo::init() {
+    imgCropperLabel->setRectCropper();
+    editCropperFixedWidth->setEnabled(false);
+    editCropperFixedHeight->setEnabled(false);
+
+    labelPreviewImage->setFixedSize(96, 96);
+    labelPreviewImage->setAlignment(Qt::AlignCenter);
+    labelPreviewImage->setFrameStyle(QFrame::Panel | QFrame::Sunken);
+    connect(imgCropperLabel, &ImageCropperLabel::croppedImageChanged,
+            this, &ImageCropperDemo::onUpdatePreview);
+
+    btnChooseOriginalImagePath->setIcon(QIcon("res/select-file.ico"));
+    btnChooseOriginalImagePath->setFixedWidth(30);
+    connect(btnChooseOriginalImagePath, &QPushButton::clicked,
+            this, &ImageCropperDemo::onChooseOriginalImage);
+
+    comboOutputShape->addItem("Rect/Square");
+    comboOutputShape->addItem("Ellipse/Circle");
+    connect(comboOutputShape, SIGNAL(currentIndexChanged(int)),
+            this, SLOT(onOutputShapeChanged(int)));
+
+    comboCropperShape->addItem("Rect");
+    comboCropperShape->addItem("Square");
+    comboCropperShape->addItem("FixedRect");
+    comboCropperShape->addItem("Ellipse");
+    comboCropperShape->addItem("Circle");
+    comboCropperShape->addItem("FixedEllipse");
+    connect(comboCropperShape, SIGNAL(currentIndexChanged(int)),
+            this, SLOT(onCropperShapeChanged(int)));
+
+    connect(editCropperFixedWidth, &QLineEdit::textChanged,
+            this, &ImageCropperDemo::onFixedWidthChanged);
+    connect(editCropperFixedHeight, &QLineEdit::textChanged,
+            this, &ImageCropperDemo::onFixedHeightChanged);
+    connect(editCropperMinWidth, &QLineEdit::textChanged,
+            this, &ImageCropperDemo::onMinWidthChanged);
+    connect(editCropperMinHeight, &QLineEdit::textChanged,
+            this, &ImageCropperDemo::onMinHeightChanged);
+
+    checkEnableOpacity->setCheckState(Qt::Checked);
+    imgCropperLabel->enableOpacity(true);
+    connect(checkEnableOpacity, &QCheckBox::stateChanged,
+            this, &ImageCropperDemo::onEnableOpacityChanged);
+
+    checkShowDragSquare->setCheckState(Qt::Checked);
+    imgCropperLabel->setShowDragSquare(true);
+    connect(checkShowDragSquare, &QCheckBox::stateChanged,
+            this, &ImageCropperDemo::onShowDragSquareChanged);
+    connect(editDragSquareEdge, &QLineEdit::textChanged,
+            this, &ImageCropperDemo::onDragSquareEdgeChanged);
+
+    sliderOpacity->setRange(0, 100);
+    sliderOpacity->setValue(60);
+    connect(sliderOpacity, &QSlider::valueChanged,
+            this, &ImageCropperDemo::onOpacityChanged);
+
+    checkShowRectBorder->setCheckState(Qt::Checked);
+    connect(checkShowRectBorder, &QCheckBox::stateChanged,
+            this, &ImageCropperDemo::onShowRectBorder);
+
+    setLabelColor(labelRectBorderColor, Qt::white);
+    btnChooseRectBorderCorlor->setIcon(QIcon("res/color-palette.ico"));
+    btnChooseRectBorderCorlor->setFixedWidth(40);
+    connect(btnChooseRectBorderCorlor, &QPushButton::clicked,
+            this, &ImageCropperDemo::onChooseRectBorderColor);
+
+    setLabelColor(labelDragSquareColor, Qt::white);
+    btnChooseDragSquareColor->setIcon(QIcon("res/color-palette.ico"));
+    btnChooseDragSquareColor->setFixedWidth(40);
+    connect(btnChooseDragSquareColor, &QPushButton::clicked,
+            this, &ImageCropperDemo::onChooseDragSquareColor);
+
+    connect(btnSavePreview, &QPushButton::clicked,
+            this, &ImageCropperDemo::onSaveCroppedImage);
+    connect(btnQuit, &QPushButton::clicked,
+            this, &ImageCropperDemo::close);
+
+    imgCropperLabel->update();
+}
+
+
+/*****************************************************************************
+ *
+ *    slots
+ *
+*****************************************************************************/
+
+void ImageCropperDemo::onChooseOriginalImage() {
+    QString filename = QFileDialog::getOpenFileName(this, "Select a picture", "",
+                                                    "picture (*.jpg *.png *.bmp)");
+    if (filename.isNull())
+        return;
+
+    QPixmap pixmap;
+    if (!pixmap.load(filename)) {
+        QMessageBox::critical(this, "Error", "Load image failed", QMessageBox::Ok);
+        return;
+    }
+
+    editOriginalImagePath->setText(filename);
+    imgCropperLabel->setOriginalImage(pixmap);
+    imgCropperLabel->update();
+    onUpdatePreview();
+    labelPreviewImage->setFrameStyle(0);
+}
+
+void ImageCropperDemo::onOutputShapeChanged(int idx) {
+    // Output: Rectangular
+    if (idx == 0)
+        imgCropperLabel->setOutputShape(OutputShape::RECT);
+    else
+        imgCropperLabel->setOutputShape(OutputShape::ELLIPSE);
+    onUpdatePreview();
+}
+
+void ImageCropperDemo::onCropperShapeChanged(int idx) {
+    switch (CropperShape(idx + 1)) {
+    case CropperShape::RECT: {
+        imgCropperLabel->setRectCropper();
+        editCropperFixedWidth->setEnabled(false);
+        editCropperFixedHeight->setEnabled(false);
+        editCropperMinWidth->setEnabled(true);
+        editCropperMinHeight->setEnabled(true);
+        checkShowDragSquare->setEnabled(true);
+        editDragSquareEdge->setEnabled(true);
+        btnChooseDragSquareColor->setEnabled(true);
+        break;
+    }
+    case CropperShape::SQUARE: {
+        imgCropperLabel->setSquareCropper();
+        editCropperFixedWidth->setEnabled(false);
+        editCropperFixedHeight->setEnabled(false);
+        editCropperMinWidth->setEnabled(true);
+        editCropperMinHeight->setEnabled(true);
+        checkShowDragSquare->setEnabled(true);
+        editDragSquareEdge->setEnabled(true);
+        btnChooseDragSquareColor->setEnabled(true);
+        break;
+    }
+    case CropperShape::FIXED_RECT: {
+        imgCropperLabel->setFixedRectCropper(QSize(64, 64));
+        editCropperFixedWidth->setEnabled(true);
+        editCropperFixedHeight->setEnabled(true);
+        editCropperMinWidth->setEnabled(false);
+        editCropperMinHeight->setEnabled(false);
+        editCropperFixedWidth->setText("64");
+        editCropperFixedHeight->setText("64");
+        checkShowDragSquare->setEnabled(false);
+        editDragSquareEdge->setEnabled(false);
+        btnChooseDragSquareColor->setEnabled(false);
+        break;
+    }
+    case CropperShape::ELLIPSE: {
+        imgCropperLabel->setEllipseCropper();
+        editCropperFixedWidth->setEnabled(false);
+        editCropperFixedHeight->setEnabled(false);
+        editCropperMinWidth->setEnabled(true);
+        editCropperMinHeight->setEnabled(true);
+        checkShowDragSquare->setEnabled(true);
+        editDragSquareEdge->setEnabled(true);
+        btnChooseDragSquareColor->setEnabled(true);
+        break;
+    }
+    case CropperShape::CIRCLE: {
+        imgCropperLabel->setCircleCropper();
+        editCropperFixedWidth->setEnabled(false);
+        editCropperFixedHeight->setEnabled(false);
+        editCropperMinWidth->setEnabled(true);
+        editCropperMinHeight->setEnabled(true);
+        checkShowDragSquare->setEnabled(true);
+        editDragSquareEdge->setEnabled(true);
+        btnChooseDragSquareColor->setEnabled(true);
+        break;
+    }
+    case CropperShape::FIXED_ELLIPSE:
+        imgCropperLabel->setFixedEllipseCropper(QSize(64, 64));
+        editCropperFixedWidth->setEnabled(true);
+        editCropperFixedHeight->setEnabled(true);
+        editCropperMinWidth->setEnabled(false);
+        editCropperMinHeight->setEnabled(false);
+        editCropperFixedWidth->setText("64");
+        editCropperFixedHeight->setText("64");
+        checkShowDragSquare->setEnabled(false);
+        editDragSquareEdge->setEnabled(false);
+        btnChooseDragSquareColor->setEnabled(false);
+        break;
+    case CropperShape::UNDEFINED:
+        break;
+    }
+
+    imgCropperLabel->update();
+    onUpdatePreview();
+}
+
+void ImageCropperDemo::onEnableOpacityChanged(int state) {
+    if (state == Qt::Checked) {
+        sliderOpacity->setEnabled(true);
+        imgCropperLabel->enableOpacity(true);
+    }
+    else {
+        sliderOpacity->setEnabled(false);
+        imgCropperLabel->enableOpacity(false);
+    }
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onShowDragSquareChanged(int state) {
+    if (state == Qt::Checked) {
+        editDragSquareEdge->setEnabled(true);
+        btnChooseDragSquareColor->setEnabled(true);
+        imgCropperLabel->setShowDragSquare(true);
+    }
+    else {
+        editDragSquareEdge->setEnabled(false);
+        btnChooseDragSquareColor->setEnabled(false);
+        imgCropperLabel->setShowDragSquare(false);
+    }
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onDragSquareEdgeChanged(QString edge) {
+    imgCropperLabel->setDragSquareEdge(edge.toInt());
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onOpacityChanged(int val) {
+    imgCropperLabel->setOpacity(val / 100.0);
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onFixedWidthChanged(QString width) {
+    imgCropperLabel->setCropperFixedWidth(width.toInt());
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onFixedHeightChanged(QString height) {
+    imgCropperLabel->setCropperFixedHeight(height.toInt());
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onMinWidthChanged(QString width) {
+    imgCropperLabel->setCropperMinimumWidth(width.toInt());
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onMinHeightChanged(QString height) {
+    imgCropperLabel->setMinimumHeight(height.toInt());
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onShowRectBorder(int state) {
+    if (state == Qt::Checked) {
+        btnChooseRectBorderCorlor->setEnabled(true);
+        imgCropperLabel->setShowRectBorder(true);
+    }
+    else {
+        btnChooseRectBorderCorlor->setEnabled(false);
+        imgCropperLabel->setShowRectBorder(false);
+    }
+    imgCropperLabel->update();
+}
+
+void ImageCropperDemo::onChooseRectBorderColor() {
+    QColor color = QColorDialog::getColor(imgCropperLabel->getBorderPen().color(), this);
+    if (color.isValid()) {
+        setLabelColor(labelRectBorderColor, color);
+        QPen pen = imgCropperLabel->getBorderPen();
+        pen.setColor(color);
+        imgCropperLabel->setBorderPen(pen);
+        imgCropperLabel->update();
+    }
+}
+
+void ImageCropperDemo::onChooseDragSquareColor() {
+    QColor color = QColorDialog::getColor(Qt::white, this);
+    if (color.isValid()) {
+        setLabelColor(labelDragSquareColor, color);
+        imgCropperLabel->setDragSquareColor(color);
+        imgCropperLabel->update();
+    }
+}
+
+void ImageCropperDemo::onUpdatePreview() {
+    QPixmap preview = imgCropperLabel->getCroppedImage();
+    preview = preview.scaled(labelPreviewImage->width(), labelPreviewImage->height(),
+                             Qt::KeepAspectRatio, Qt::SmoothTransformation);
+    labelPreviewImage->setPixmap(preview);
+}
+
+void ImageCropperDemo::onSaveCroppedImage() {
+    const QPixmap* pixmap = labelPreviewImage->pixmap();
+    if (!pixmap) {
+        QMessageBox::information(this, "Error", "There is no cropped image to save.", QMessageBox::Ok);
+        return ;
+    }
+
+    QString filename = QFileDialog::getSaveFileName(this, "Save cropped image", "", "picture (*.png)");
+    if (!filename.isNull()) {
+        if (imgCropperLabel->getCroppedImage().save(filename, "PNG"))
+            QMessageBox::information(this, "Prompt", "Saved successfully", QMessageBox::Ok);
+        else
+            QMessageBox::information(this, "Error", "Save image failed!", QMessageBox::Ok);
+    }
+}
+

netfriend/imagecropper/example/imagecropperdemo.h

@@ -0,0 +1,85 @@
+#ifndef TESTIMAGECROPPERLABEL_H
+#define TESTIMAGECROPPERLABEL_H
+
+#include <QObject>
+#include <QDialog>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QComboBox>
+#include <QLineEdit>
+#include <QCheckBox>
+#include <QPushButton>
+#include <QSlider>
+
+#include "../base/imagecropperlabel.h"
+
+class ImageCropperDemo : public QDialog
+{
+    Q_OBJECT
+public:
+    ImageCropperDemo(QWidget* parent = 0);
+
+    void setupLayout();
+
+    void init();
+
+public slots:
+    void onOutputShapeChanged(int idx);
+    void onCropperShapeChanged(int idx);
+    void onEnableOpacityChanged(int state);
+    void onShowDragSquareChanged(int state);
+    void onDragSquareEdgeChanged(QString edge);
+    void onOpacityChanged(int val);
+    void onFixedWidthChanged(QString width);
+    void onFixedHeightChanged(QString height);
+    void onMinWidthChanged(QString width);
+    void onMinHeightChanged(QString height);
+    void onShowRectBorder(int state);
+    void onChooseRectBorderColor();
+    void onChooseDragSquareColor();
+
+    void onChooseOriginalImage();
+    void onUpdatePreview();
+    void onSaveCroppedImage();
+
+private:
+    void setLabelColor(QLabel* label, QColor color) {
+        QPixmap pixmap(QSize(80, 25));
+        pixmap.fill(color);
+        label->setPixmap(pixmap);
+    }
+
+private:
+    ImageCropperLabel* imgCropperLabel;
+    QHBoxLayout* mainLayout;
+
+    QLabel* labelPreviewImage;
+
+    QComboBox* comboOutputShape;
+    QComboBox* comboCropperShape;
+
+    QLineEdit* editOriginalImagePath;
+    QPushButton* btnChooseOriginalImagePath;
+
+    QLineEdit* editCropperFixedWidth;
+    QLineEdit* editCropperFixedHeight;
+    QLineEdit* editCropperMinWidth;
+    QLineEdit* editCropperMinHeight;
+
+    QCheckBox* checkShowDragSquare;
+    QCheckBox* checkEnableOpacity;
+    QSlider* sliderOpacity;
+    QLineEdit* editDragSquareEdge;
+
+    QCheckBox* checkShowRectBorder;
+    QLabel* labelRectBorderColor;
+    QPushButton* btnChooseRectBorderCorlor;
+
+    QLabel* labelDragSquareColor;
+    QPushButton* btnChooseDragSquareColor;
+
+    QPushButton* btnSavePreview;
+    QPushButton* btnQuit;
+};
+
+#endif // TESTIMAGECROPPERLABEL_H

netfriend/imagecropper/example/main.cpp

@@ -0,0 +1,11 @@
+#include "mainwindow.h"
+
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+    return a.exec();
+}

netfriend/imagecropper/example/mainwindow.cpp

@@ -0,0 +1,62 @@
+#include "mainwindow.h"
+#include "imagecropperdemo.h"
+
+#include "../base/imagecropperdialog.h"
+
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+#include <QFileDialog>
+
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setupLayout();
+}
+
+MainWindow::~MainWindow()
+{
+}
+
+void MainWindow::setupLayout() {
+    QWidget* centralWidget = new QWidget(this);
+
+    btnCustomCrop = new QPushButton("Custom Crop", centralWidget);
+    btnSimpleCrop = new QPushButton("Simple Crop", centralWidget);
+
+    QVBoxLayout* mainLayout = new QVBoxLayout(centralWidget);
+    mainLayout->addWidget(btnCustomCrop);
+    mainLayout->addWidget(btnSimpleCrop);
+    this->setCentralWidget(centralWidget);
+
+    connect(btnCustomCrop, &QPushButton::clicked, this, &MainWindow::onCustomCrop);
+    connect(btnSimpleCrop, &QPushButton::clicked, this, &MainWindow::onSimpleCrop);
+}
+
+void MainWindow::onCustomCrop() {
+    ImageCropperDemo* dialog = new ImageCropperDemo(this);
+    dialog->show();
+}
+
+void MainWindow::onSimpleCrop() {
+    QMessageBox::information(this, "Prompt", "Please select a picture", QMessageBox::Ok);
+    QString filename = QFileDialog::getOpenFileName(this, "Select image", "", "image (*.png *.jpg)");
+    if (filename.isNull())
+        return;
+
+    //                                   *********
+    //                                    *******
+    //                                     *****
+    //                                      ***
+    //                                       *
+    QPixmap image = ImageCropperDialog::getCroppedImage(filename, 600, 400, CropperShape::CIRCLE);
+    if (image.isNull())
+        return;
+
+    QDialog* dialog = new QDialog(0);
+    dialog->setAttribute(Qt::WA_DeleteOnClose, true);
+    QLabel* label = new QLabel(dialog);
+    label->setFixedSize(image.size());
+    label->setPixmap(image);
+    dialog->exec();
+}

netfriend/imagecropper/example/mainwindow.h

@@ -0,0 +1,26 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QPushButton>
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow(QWidget *parent = 0);
+    ~MainWindow();
+
+public slots:
+    void onCustomCrop();
+    void onSimpleCrop();
+
+private:
+    void setupLayout();
+
+private:
+    QPushButton* btnCustomCrop;
+    QPushButton* btnSimpleCrop;
+};
+#endif // MAINWINDOW_H

netfriend/imagecropper/imagecropper.pro

@@ -0,0 +1,20 @@
+QT += core gui
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+greaterThan(QT_MAJOR_VERSION, 5): QT += core5compat
+
+TEMPLATE    = app
+DESTDIR     = $$PWD/../bin
+CONFIG      += warn_off
+CONFIG      += c++11
+
+SOURCES += \
+    base/imagecropperlabel.cpp \
+    example/imagecropperdemo.cpp \
+    example/main.cpp \
+    example/mainwindow.cpp
+
+HEADERS += \
+    base/imagecropperdialog.h \
+    base/imagecropperlabel.h \
+    example/imagecropperdemo.h \
+    example/mainwindow.h

netfriend/imageviewwindow/graphicspixmap.cpp

@@ -0,0 +1,59 @@
+#include "graphicspixmap.h"
+
+#include <QGraphicsSceneMouseEvent>
+#include <QPainter>
+#include <QCursor>
+#include <QDebug>
+
+GraphicsPixmap::GraphicsPixmap() : QGraphicsObject()
+{
+	setCacheMode(DeviceCoordinateCache);
+}
+
+void GraphicsPixmap::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+	QGraphicsObject::mousePressEvent(event);
+	if (event->button() == Qt::LeftButton)
+	{
+		emit clicked();
+	}
+}
+
+void GraphicsPixmap::setItemOffset(QPointF ponit)
+{
+	prepareGeometryChange();
+	offset = ponit;
+	update();
+}
+
+QPointF GraphicsPixmap::itemoffset()
+{
+	return offset;
+}
+
+void GraphicsPixmap::setPixmap(const QPixmap& pixmap)
+{
+	pixSize = pixmap.size();
+	pix = pixmap;
+}
+
+void GraphicsPixmap::setPixmapSize(QSize size)
+{
+	pixSize = size;
+}
+
+QSize GraphicsPixmap::pixsize()
+{
+	return pixSize;
+}
+
+QRectF GraphicsPixmap::boundingRect() const
+{
+	return QRectF(offset, pix.size() / pix.devicePixelRatio());
+}
+
+void GraphicsPixmap::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
+{
+	painter->setRenderHint(QPainter::SmoothPixmapTransform, true);
+	painter->drawPixmap(offset, pix.scaled(pixSize, Qt::KeepAspectRatio, Qt::SmoothTransformation));
+}

netfriend/imageviewwindow/graphicspixmap.h

@@ -0,0 +1,38 @@
+#ifndef GRAPHICSPIXMAP_H
+#define GRAPHICSPIXMAP_H
+
+#include <QObject>
+#include <QGraphicsObject> 
+#include <QPixmap>
+
+class GraphicsPixmap : public QGraphicsObject
+{
+	Q_OBJECT
+	Q_PROPERTY(QPointF itemoffset READ itemoffset WRITE setItemOffset)
+	Q_PROPERTY(QSize itemsize READ pixsize WRITE setPixmapSize)
+
+public:
+	GraphicsPixmap();
+
+public:
+	QRectF boundingRect() const Q_DECL_OVERRIDE;
+	void setItemOffset(QPointF ponit);
+	QPointF itemoffset();
+	QSize pixsize();
+	void setPixmap(const QPixmap& pixmap);
+	void setPixmapSize(QSize size);
+
+signals:
+	void clicked();
+
+private:
+	void mousePressEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+	void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *) Q_DECL_OVERRIDE;
+
+private:
+	QPixmap pix;
+	QPointF offset;
+	QSize pixSize;
+};
+
+#endif // GRAPHICSPIXMAP_H

netfriend/imageviewwindow/graphicsview.cpp

@@ -0,0 +1,18 @@
+#include "graphicsview.h"
+
+GraphicsView::GraphicsView(QGraphicsScene *scene)
+	: QGraphicsView(scene)
+{
+
+}
+
+GraphicsView::~GraphicsView()
+{
+
+}
+
+void GraphicsView::resizeEvent(QResizeEvent *event)
+{
+	QGraphicsView::resizeEvent(event);
+	fitInView(sceneRect(), Qt::KeepAspectRatio);
+}

netfriend/imageviewwindow/graphicsview.h

@@ -0,0 +1,18 @@
+#ifndef GRAPHICSVIEW_H
+#define GRAPHICSVIEW_H
+
+#include <QGraphicsView>
+
+class GraphicsView : public QGraphicsView
+{
+	Q_OBJECT
+
+public:
+	GraphicsView(QGraphicsScene *scene);
+	~GraphicsView();
+
+protected:
+	void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE;	
+};
+
+#endif // GRAPHICSVIEW_H

netfriend/imageviewwindow/imageviewwindow.cpp

@@ -0,0 +1,211 @@
+#include "imageviewwindow.h"
+#include "graphicsview.h"
+#include "graphicspixmap.h"
+
+#include <QParallelAnimationGroup>
+#include <QPropertyAnimation>
+#include <QDebug>
+#include <QTimer>
+
+const int image_conunt = 5;
+const int image_yoffset = 40;
+const int image_xoffset = 60;
+ImageViewWindow::ImageViewWindow(QWidget *parent)
+	: QWidget(parent)
+	, m_isStart(false)
+{
+	ui.setupUi(this);
+	initControl();
+}
+
+ImageViewWindow::~ImageViewWindow()
+{
+
+}
+
+void ImageViewWindow::initControl()
+{
+	//场景
+	m_scene = new QGraphicsScene(QRect(0, 0, 876, 368), this);	
+	//图片信息
+	m_imgMapInfolst << QMap<QString, QString>{
+		{ "zIndex"  , "1"   }, 
+		{ "width"   , "120" }, 
+		{ "height"  , "150" }, 
+		{ "top"     , "71"  }, 
+		{ "left"    , "134" }, 
+		{ "opacity" , "0.6" }
+	};
+	m_imgMapInfolst << QMap<QString, QString>{
+		{ "zIndex", "2"   },
+		{ "width", "130" },
+		{ "height", "170" },
+		{ "top", "61" },
+		{ "left", "0" },
+		{ "opacity", "0.7" }
+	};
+	m_imgMapInfolst << QMap<QString, QString>{
+		{ "zIndex", "3"   },
+		{ "width", "170" },
+		{ "height", "218" },
+		{ "top", "37" },
+		{ "left", "110" },
+		{ "opacity", "0.8" }
+	};
+	m_imgMapInfolst << QMap<QString, QString>{
+		{ "zIndex", "4"   },
+		{ "width", "224" },
+		{ "height", "288" },
+		{ "top", "0" },
+		{ "left", "262" },
+		{ "opacity", "1" }
+	};
+	m_imgMapInfolst << QMap<QString, QString>{
+		{ "zIndex", "3"   },
+		{ "width", "170" },
+		{ "height", "218" },
+		{ "top", "37" },
+		{ "left", "468" },
+		{ "opacity", "0.8" }
+	};
+	m_imgMapInfolst << QMap<QString, QString>{
+		{ "zIndex", "2"   },
+		{ "width", "130" },
+		{ "height", "170" },
+		{ "top", "61" },
+		{ "left", "620" },
+		{ "opacity", "0.7" }
+	};
+	m_imgMapInfolst << QMap<QString, QString>{
+		{ "zIndex", "1"   },
+		{ "width", "120" },
+		{ "height", "150" },
+		{ "top", "71" },
+		{ "left", "496" },
+		{ "opacity", "0.6" }
+	};
+
+	//场景中添加图片元素
+	for (int index = 0; index < m_imgMapInfolst.size(); index++)
+	{
+		const auto imageInfoMap = m_imgMapInfolst[index];
+		const QString&& centerImg = QString(":/ImageViewWindow/Resources/%1.jpg").arg(index + 1);
+		const QPixmap&& pixmap = QPixmap(centerImg);
+		GraphicsPixmap *item = new GraphicsPixmap();
+		item->setPixmap(pixmap);
+		item->setPixmapSize(QSize(imageInfoMap["width"].toInt(), imageInfoMap["height"].toInt()));
+		item->setItemOffset(QPointF(imageInfoMap["left"].toInt() + image_xoffset, imageInfoMap["top"].toInt() + image_yoffset));
+		item->setZValue(imageInfoMap["zIndex"].toInt());
+		item->setOpacity(imageInfoMap["opacity"].toFloat());
+		m_items << item;
+		m_scene->addItem(item);
+	}
+
+	//left button
+	GraphicsPixmap *leftBtn = new GraphicsPixmap();
+	leftBtn->setCursor(QCursor(Qt::PointingHandCursor));
+	leftBtn->setPixmap(QPixmap(":/ImageViewWindow/Resources/Wblog_left.png"));
+	leftBtn->setItemOffset(QPointF(12, image_yoffset + 124));
+	leftBtn->setZValue(5);
+	m_scene->addItem(leftBtn);
+	connect(leftBtn, SIGNAL(clicked()), this, SLOT(onLeftBtnClicked()));
+	//right button
+	GraphicsPixmap *rightBtn = new GraphicsPixmap();
+	rightBtn->setCursor(QCursor(Qt::PointingHandCursor));
+	rightBtn->setPixmap(QPixmap(":/ImageViewWindow/Resources/Wblog_right.png"));
+	rightBtn->setItemOffset(QPointF(836, image_yoffset + 124));
+	rightBtn->setZValue(5);
+	m_scene->addItem(rightBtn);
+	connect(rightBtn, SIGNAL(clicked()), this, SLOT(onRightBtnClicked()));
+
+	//视图
+	GraphicsView *view = new GraphicsView(m_scene);
+	view->setFrameShape(QFrame::NoFrame);
+	view->setParent(this);
+	view->setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
+	view->setBackgroundBrush(QColor(46, 46, 46));
+	view->setCacheMode(QGraphicsView::CacheBackground);
+	view->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
+	ui.viewlayout->addWidget(view);
+
+	//动画: 大小，位置
+	m_group = new QParallelAnimationGroup;
+	for (int i = 0; i < m_items.count(); ++i) {
+		QPropertyAnimation *anim = new QPropertyAnimation(m_items[i], "itemoffset");
+		QPropertyAnimation *anims = new QPropertyAnimation(m_items[i], "itemsize");
+		m_animationMap.insert(m_items[i], anim);
+		m_animationsMap.insert(m_items[i], anims);
+		anim->setDuration(1000);
+		anims->setDuration(1000);
+		anim->setEasingCurve(QEasingCurve::OutQuad);
+		anims->setEasingCurve(QEasingCurve::OutQuad);
+		m_group->addAnimation(anim);
+		m_group->addAnimation(anims);
+	}
+	//定时切换图片
+	m_timer = new QTimer(this);
+	m_timer->setInterval(2000);
+	connect(m_timer, &QTimer::timeout, [this](){
+		nextPlay();
+	});
+	connect(m_group, &QParallelAnimationGroup::finished, [this](){
+		m_isStart = false;
+		m_timer->start();
+	});
+	m_timer->start();
+}
+
+void ImageViewWindow::onLeftBtnClicked()
+{
+	//鼠标点击的时候，先暂停定时器预览
+	m_timer->stop();
+	//上一张
+	lastPlay();
+}
+
+void ImageViewWindow::onRightBtnClicked()
+{
+	//鼠标点击的时候，先暂停定时器预览
+	m_timer->stop();
+	//下一张
+	nextPlay();
+}
+
+void ImageViewWindow::play()
+{
+	for (int index = 0; index < m_imgMapInfolst.size(); index++)
+	{
+		const auto item = m_items[index];
+		QPropertyAnimation *anim = m_animationMap.value(item);
+		QPropertyAnimation *anims = m_animationsMap.value(item);
+		const auto imageInfoMap = m_imgMapInfolst[index];
+		item->setZValue(imageInfoMap["zIndex"].toInt());
+		item->setOpacity(imageInfoMap["opacity"].toFloat());
+		QPointF pointf(imageInfoMap["left"].toInt() + image_xoffset, imageInfoMap["top"].toInt() + image_yoffset);
+        const QString&& centerImg = QString(":/ImageViewWindow/Resources/%1.jpg").arg(index + 1);
+		anim->setStartValue(item->itemoffset());
+		anims->setStartValue(item->pixsize());
+		anim->setEndValue(pointf);
+		anims->setEndValue(QSize(imageInfoMap["width"].toInt(), imageInfoMap["height"].toInt()));
+	}
+	m_isStart = true;
+}
+
+
+void ImageViewWindow::nextPlay()
+{
+	m_group->stop();
+	auto firstItem = m_items.takeAt(0);
+	m_items << firstItem;
+	play();
+	m_group->start();
+}
+
+void ImageViewWindow::lastPlay()
+{
+	m_group->stop();
+	auto lastItem = m_items.takeAt(m_items.size() - 1);
+	m_items.prepend(lastItem);
+	play();
+	m_group->start();
+}

netfriend/imageviewwindow/imageviewwindow.h

@@ -0,0 +1,42 @@
+#ifndef IMAGEVIEWWINDOW_H
+#define IMAGEVIEWWINDOW_H
+
+#include <QtWidgets/QWidget>
+#include "ui_imageviewwindow.h"
+
+class QTimer;
+class QPropertyAnimation;
+class GraphicsPixmap;
+class QGraphicsScene;
+class QParallelAnimationGroup;
+class ImageViewWindow : public QWidget
+{
+	Q_OBJECT
+
+public:
+	ImageViewWindow(QWidget *parent = 0);
+	~ImageViewWindow();
+
+private:
+	void initControl();
+	void nextPlay();
+	void lastPlay();
+	void play();
+
+private slots:
+	void onLeftBtnClicked();
+	void onRightBtnClicked();
+
+private:
+	Ui::ImageViewWindowClass ui;
+	QGraphicsScene* m_scene;
+    QList<QMap<QString, QString> > m_imgMapInfolst;
+	QList<GraphicsPixmap *> m_items;
+	QParallelAnimationGroup *m_group;
+	QMap<GraphicsPixmap *, QPropertyAnimation *> m_animationMap;
+	QMap<GraphicsPixmap *, QPropertyAnimation *> m_animationsMap;
+	QTimer* m_timer;
+	bool m_isStart;
+};
+
+#endif // IMAGEVIEWWINDOW_H

netfriend/imageviewwindow/imageviewwindow.pro

@@ -0,0 +1,20 @@
+QT += core gui
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+greaterThan(QT_MAJOR_VERSION, 5): QT += core5compat
+
+TARGET      = imageviewwindow
+TEMPLATE    = app
+DESTDIR     = $$PWD/../bin
+CONFIG      += warn_off
+
+HEADERS     += graphicsview.h
+HEADERS     += graphicspixmap.h
+HEADERS     += imageviewwindow.h
+
+SOURCES     += main.cpp
+SOURCES     += graphicspixmap.cpp
+SOURCES     += graphicsview.cpp
+SOURCES     += imageviewwindow.cpp
+
+FORMS       += imageviewwindow.ui
+RESOURCES   += imageviewwindow.qrc

netfriend/imageviewwindow/imageviewwindow.qrc

@@ -0,0 +1,13 @@
+<RCC>
+    <qresource prefix="/ImageViewWindow">
+        <file>Resources/1.jpg</file>
+        <file>Resources/2.jpg</file>
+        <file>Resources/3.jpg</file>
+        <file>Resources/4.jpg</file>
+        <file>Resources/5.jpg</file>
+        <file>Resources/6.jpg</file>
+        <file>Resources/7.jpg</file>
+        <file>Resources/Wblog_left.png</file>
+        <file>Resources/Wblog_right.png</file>
+    </qresource>
+</RCC>

netfriend/imageviewwindow/imageviewwindow.ui

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ImageViewWindowClass</class>
+ <widget class="QWidget" name="ImageViewWindowClass">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>1062</width>
+    <height>538</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>ImageViewWindow</string>
+  </property>
+  <layout class="QVBoxLayout" name="viewlayout">
+   <property name="spacing">
+    <number>0</number>
+   </property>
+   <property name="leftMargin">
+    <number>0</number>
+   </property>
+   <property name="topMargin">
+    <number>0</number>
+   </property>
+   <property name="rightMargin">
+    <number>0</number>
+   </property>
+   <property name="bottomMargin">
+    <number>0</number>
+   </property>
+  </layout>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources>
+  <include location="imageviewwindow.qrc"/>
+ </resources>
+ <connections/>
+</ui>

netfriend/imageviewwindow/main.cpp

@@ -0,0 +1,29 @@
+#pragma execution_character_set("utf-8")
+
+#include "imageviewwindow.h"
+#include <QtWidgets/QApplication>
+#include <QTextCodec>
+
+int main(int argc, char *argv[])
+{
+	QApplication a(argc, argv);
+    a.setFont(QFont("Microsoft Yahei", 9));
+
+#if (QT_VERSION <= QT_VERSION_CHECK(5,0,0))
+#if _MSC_VER
+    QTextCodec *codec = QTextCodec::codecForName("gbk");
+#else
+    QTextCodec *codec = QTextCodec::codecForName("utf-8");
+#endif
+    QTextCodec::setCodecForLocale(codec);
+    QTextCodec::setCodecForCStrings(codec);
+    QTextCodec::setCodecForTr(codec);
+#else
+    QTextCodec *codec = QTextCodec::codecForName("utf-8");
+    QTextCodec::setCodecForLocale(codec);
+#endif
+
+	ImageViewWindow w;
+	w.show();
+	return a.exec();
+}

netfriend/netfriend.pro

@@ -0,0 +1,5 @@
+TEMPLATE = subdirs
+SUBDIRS += astackwidget
+SUBDIRS += imagecropper
+SUBDIRS += imageviewwindow
+SUBDIRS += slidepuzzlewidget

netfriend/slidepuzzlewidget/frmslidepuzzlewidget.cpp

@@ -0,0 +1,18 @@
+#include "frmslidepuzzlewidget.h"
+
+FrmSlidePuzzleWidget::FrmSlidePuzzleWidget(QWidget *parent)
+	: QWidget(parent)
+{
+	ui.setupUi(this);
+	this->initForm();
+}
+
+FrmSlidePuzzleWidget::~FrmSlidePuzzleWidget()
+{
+
+}
+
+void FrmSlidePuzzleWidget::initForm()
+{
+
+}

netfriend/slidepuzzlewidget/frmslidepuzzlewidget.h

@@ -0,0 +1,22 @@
+#ifndef FRMSLIDEPUZZLEWIDGET_H
+#define FRMSLIDEPUZZLEWIDGET_H
+
+#include <QtWidgets/QWidget>
+#include "ui_frmslidepuzzlewidget.h"
+
+class FrmSlidePuzzleWidget : public QWidget
+{
+	Q_OBJECT
+
+public:
+	FrmSlidePuzzleWidget(QWidget *parent = 0);
+	~FrmSlidePuzzleWidget();
+
+private:
+	void initForm();
+
+private:
+	Ui::FrmSlidePuzzleWidgetClass ui;
+};
+
+#endif // FRMSLIDEPUZZLEWIDGET_H

netfriend/slidepuzzlewidget/frmslidepuzzlewidget.qrc

@@ -0,0 +1,8 @@
+<RCC>
+    <qresource prefix="/FrmSlidePuzzleWidget">
+        <file>Resources/back1.png</file>
+        <file>Resources/back2.png</file>
+        <file>Resources/back3.png</file>
+        <file>Resources/back4.png</file>
+    </qresource>
+</RCC>

netfriend/slidepuzzlewidget/frmslidepuzzlewidget.ui

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>FrmSlidePuzzleWidgetClass</class>
+ <widget class="QWidget" name="FrmSlidePuzzleWidgetClass">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>600</width>
+    <height>400</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>FrmSlidePuzzleWidget</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <property name="spacing">
+    <number>20</number>
+   </property>
+   <property name="leftMargin">
+    <number>20</number>
+   </property>
+   <property name="topMargin">
+    <number>20</number>
+   </property>
+   <property name="rightMargin">
+    <number>20</number>
+   </property>
+   <property name="bottomMargin">
+    <number>20</number>
+   </property>
+   <item>
+    <widget class="SliderPuzzleWidget" name="sliderpuzzleWidget" native="true"/>
+   </item>
+  </layout>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <customwidgets>
+  <customwidget>
+   <class>SliderPuzzleWidget</class>
+   <extends>QWidget</extends>
+   <header>sliderpuzzlewidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources>
+  <include location="frmslidepuzzlewidget.qrc"/>
+ </resources>
+ <connections/>
+</ui>

netfriend/slidepuzzlewidget/main.cpp

@@ -0,0 +1,30 @@
+#pragma execution_character_set("utf-8")
+
+#include "frmslidepuzzlewidget.h"
+#include <QApplication>
+#include <QTextCodec>
+
+int main(int argc, char *argv[])
+{
+	QApplication a(argc, argv);
+	a.setFont(QFont("Microsoft Yahei", 10));
+
+#if (QT_VERSION <= QT_VERSION_CHECK(5,0,0))
+#if _MSC_VER
+	QTextCodec *codec = QTextCodec::codecForName("gbk");
+#else
+	QTextCodec *codec = QTextCodec::codecForName("utf-8");
+#endif
+	QTextCodec::setCodecForLocale(codec);
+	QTextCodec::setCodecForCStrings(codec);
+	QTextCodec::setCodecForTr(codec);
+#else
+	QTextCodec *codec = QTextCodec::codecForName("utf-8");
+	QTextCodec::setCodecForLocale(codec);
+#endif
+
+	FrmSlidePuzzleWidget w;
+	w.setWindowTitle("滑块图片验证码");
+	w.show();
+	return a.exec();
+}

netfriend/slidepuzzlewidget/puzzlewidget.cpp

@@ -0,0 +1,81 @@
+#include "puzzlewidget.h"
+
+#include <QPainter>
+#include <QPainterPath>
+#include <QTime>
+#include <QTimer>
+
+const int squarewidth = 46;
+const int squareradius = 20;
+PuzzleWidget::PuzzleWidget(QWidget *parent)
+	: QWidget(parent)
+{
+	m_value = 0;
+	m_offsetPoint = QPoint(0, 0);
+    srand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
+}
+
+PuzzleWidget::~PuzzleWidget()
+{
+
+}
+
+void PuzzleWidget::setPixmap(const QString& pixmap)
+{
+	m_pixmap = pixmap;
+	QTimer::singleShot(10, this, SLOT(onUpdatePixmap()));
+}
+
+void PuzzleWidget::onUpdatePixmap()
+{
+    m_offsetPoint.rx() = qBound(0, rand() % this->width() + squarewidth + squareradius, this->width() - squarewidth - squareradius);
+    m_offsetPoint.ry() = qBound(0, rand() % this->height() + squarewidth + squareradius, this->height() - squarewidth - squareradius);
+	update();
+}
+
+void PuzzleWidget::setValue(int value)
+{
+	m_value = qBound(0, value, this->width() - squarewidth - squareradius + m_offsetPoint.x());
+	update();
+}
+
+void PuzzleWidget::paintEvent(QPaintEvent *event)
+{
+	QPainter painter(this);
+	painter.setRenderHints(QPainter::Antialiasing);
+	QPainterPath clippath;
+	clippath.addRoundedRect(this->rect(), 4, 4);
+	painter.setClipPath(clippath);
+	const QPixmap& pixmap = QPixmap(m_pixmap).scaled(this->width(), this->height(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
+	painter.drawPixmap(0, 0, this->width(), this->height(), pixmap);
+
+	QPainterPath cutoutpath;
+	cutoutpath.setFillRule(Qt::WindingFill);
+	QRect rect(m_offsetPoint, QSize(squarewidth, squarewidth));
+	cutoutpath.addRoundedRect(rect, 2, 2);
+	cutoutpath.addEllipse(rect.center().x() - squareradius / 2, rect.top() - squareradius + 6, squareradius, squareradius);
+	QPainterPath subellipseparh;
+	subellipseparh.addEllipse(rect.right() - squareradius + 6, rect.center().y() - squareradius / 2, squareradius, squareradius);
+	cutoutpath -= subellipseparh;
+
+	painter.setPen(QPen(QColor(80, 80, 80), 1));
+	painter.setBrush(QColor(100, 100, 100, 220));
+	painter.drawPath(cutoutpath);
+
+	QPixmap puzzlePixmap(this->size());
+	puzzlePixmap.fill(Qt::transparent);
+	QPainter puzzlePainter(&puzzlePixmap);
+	puzzlePainter.setRenderHints(QPainter::Antialiasing);
+	puzzlePainter.setClipPath(cutoutpath);
+	puzzlePainter.setPen(QPen(QColor(80, 80, 80), 2));
+	puzzlePainter.setBrush(QColor(200, 200, 200, 100));
+	puzzlePainter.drawPixmap(0, 0, this->width(), this->height(), pixmap);
+	puzzlePainter.drawPath(cutoutpath);
+
+	painter.drawPixmap(-m_offsetPoint.x() + m_value, 0, this->width(), this->height(), puzzlePixmap);
+}
+
+bool PuzzleWidget::isOverlap()
+{
+	return qAbs(-m_offsetPoint.x() + m_value) < 5;
+}

netfriend/slidepuzzlewidget/puzzlewidget.h

@@ -0,0 +1,34 @@
+#ifndef PUZZLEWIDGET_H
+#define PUZZLEWIDGET_H
+
+#include <QWidget>
+
+class PuzzleWidget : public QWidget
+{
+	Q_OBJECT
+	Q_PROPERTY(QString pixmap READ getPixmap WRITE setPixmap)
+
+public:
+	PuzzleWidget(QWidget *parent);
+	~PuzzleWidget();
+
+public:
+	QString getPixmap() const { return m_pixmap; };
+	void setPixmap(const QString& pixmap);
+
+	void setValue(int value);
+	bool isOverlap();
+
+private slots:
+	void onUpdatePixmap();
+
+protected:
+	void paintEvent(QPaintEvent *event);
+
+private:
+	int m_value;
+	QString m_pixmap;
+	QPoint m_offsetPoint;
+};
+
+#endif // PUZZLEWIDGET_H

netfriend/slidepuzzlewidget/slidepuzzlewidget.pro

@@ -0,0 +1,23 @@
+QT += core gui
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+greaterThan(QT_MAJOR_VERSION, 5): QT += core5compat
+
+TEMPLATE    = app
+TARGET      = slidepuzzlewidget
+DESTDIR     = $$PWD/../bin
+CONFIG      += warn_off
+
+HEADERS     += frmslidepuzzlewidget.h
+HEADERS     += puzzlewidget.h
+HEADERS     += sliderpuzzlewidget.h
+
+SOURCES     += main.cpp
+SOURCES     += frmslidepuzzlewidget.cpp
+SOURCES     += puzzlewidget.cpp
+SOURCES     += sliderpuzzlewidget.cpp
+
+FORMS       += frmslidepuzzlewidget.ui
+FORMS       += sliderpuzzlewidget.ui
+RESOURCES += frmslidepuzzlewidget.qrc
+
+

netfriend/slidepuzzlewidget/sliderpuzzlewidget.cpp

@@ -0,0 +1,49 @@
+#pragma execution_character_set("utf-8")
+#include "sliderpuzzlewidget.h"
+
+#include <QTimer>
+#include <QMessageBox>
+
+SliderPuzzleWidget::SliderPuzzleWidget(QWidget *parent)
+	: QWidget(parent)
+{
+	ui.setupUi(this);
+	this->initForm();
+}
+
+SliderPuzzleWidget::~SliderPuzzleWidget()
+{
+
+}
+
+void SliderPuzzleWidget::initForm()
+{
+	QTimer::singleShot(10, this, SLOT(onUpdateWidget()));
+	connect(ui.horizontalSlider, &QSlider::valueChanged, this, &SliderPuzzleWidget::onSliderValueChanged);
+	connect(ui.horizontalSlider, &QSlider::sliderReleased, this, &SliderPuzzleWidget::onSliderReleased);
+	ui.puzzlewidget->setPixmap(":/FrmSlidePuzzleWidget/Resources/back1.png");
+}
+
+void SliderPuzzleWidget::onUpdateWidget()
+{
+	ui.horizontalSlider->setRange(0, this->width());
+}
+
+void SliderPuzzleWidget::onSliderValueChanged(int value)
+{
+	ui.puzzlewidget->setValue(value);
+}
+
+void SliderPuzzleWidget::onSliderReleased()
+{
+	QString content = ui.puzzlewidget->isOverlap() ? "验证成功！" : "验证失败！";
+	QMessageBox msgBox;
+	msgBox.setWindowTitle("滑块图片验证码");
+	msgBox.setText(content);
+	msgBox.exec();
+
+	static int testIndex = 1;
+	testIndex = testIndex + 1 > 4 ? 1 : testIndex + 1;
+	ui.horizontalSlider->setValue(0);
+	ui.puzzlewidget->setPixmap(QString(":/FrmSlidePuzzleWidget/Resources/back%1.png").arg(testIndex));
+}

netfriend/slidepuzzlewidget/sliderpuzzlewidget.h

@@ -0,0 +1,27 @@
+#ifndef SLIDERPUZZLEWIDGET_H
+#define SLIDERPUZZLEWIDGET_H
+
+#include <QWidget>
+#include "ui_sliderpuzzlewidget.h"
+
+class SliderPuzzleWidget : public QWidget
+{
+	Q_OBJECT
+
+public:
+	SliderPuzzleWidget(QWidget *parent = 0);
+	~SliderPuzzleWidget();
+
+private:
+	void initForm();
+
+private slots:
+	void onUpdateWidget();
+	void onSliderValueChanged(int value);
+	void onSliderReleased();
+
+private:
+	Ui::SliderPuzzleWidget ui;
+};
+
+#endif // SLIDERPUZZLEWIDGET_H

netfriend/slidepuzzlewidget/sliderpuzzlewidget.ui

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>SliderPuzzleWidget</class>
+ <widget class="QWidget" name="SliderPuzzleWidget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>717</width>
+    <height>320</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>SliderPuzzleWidget</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <property name="spacing">
+    <number>14</number>
+   </property>
+   <property name="leftMargin">
+    <number>0</number>
+   </property>
+   <property name="topMargin">
+    <number>0</number>
+   </property>
+   <property name="rightMargin">
+    <number>0</number>
+   </property>
+   <property name="bottomMargin">
+    <number>0</number>
+   </property>
+   <item>
+    <widget class="PuzzleWidget" name="puzzlewidget" native="true"/>
+   </item>
+   <item>
+    <widget class="QSlider" name="horizontalSlider">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <customwidgets>
+  <customwidget>
+   <class>PuzzleWidget</class>
+   <extends>QWidget</extends>
+   <header>puzzlewidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>