Add imageCropper

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(nullptr)
+        , 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(nullptr, "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