新增网络中转服务器+designer源码项目
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feiyangqingyun
265
designer/lib/shared/dialoggui.cpp
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265
designer/lib/shared/dialoggui.cpp
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Designer of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "dialoggui_p.h"
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#include <QtGui/QFileIconProvider>
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#include <QtGui/QIcon>
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#include <QtGui/QImage>
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#include <QtGui/QImageReader>
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#include <QtGui/QPixmap>
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#include <QtCore/QFileInfo>
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#include <QtCore/QFile>
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#include <QtCore/QSet>
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// QFileDialog on X11 does not provide an image preview. Display icons.
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#ifdef Q_WS_X11
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# define IMAGE_PREVIEW
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#endif
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QT_BEGIN_NAMESPACE
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namespace qdesigner_internal {
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// Icon provider that reads out the known image formats
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class IconProvider : public QFileIconProvider {
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Q_DISABLE_COPY(IconProvider)
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public:
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IconProvider();
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virtual QIcon icon (const QFileInfo &info) const;
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inline bool loadCheck(const QFileInfo &info) const;
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QImage loadImage(const QString &fileName) const;
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private:
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QSet<QString> m_imageFormats;
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};
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IconProvider::IconProvider()
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{
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// Determine a list of readable extensions (upper and lower case)
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typedef QList<QByteArray> ByteArrayList;
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const ByteArrayList fmts = QImageReader::supportedImageFormats();
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const ByteArrayList::const_iterator cend = fmts.constEnd();
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for (ByteArrayList::const_iterator it = fmts.constBegin(); it != cend; ++it) {
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const QString suffix = QString::fromUtf8(it->constData());
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m_imageFormats.insert(suffix.toLower());
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m_imageFormats.insert(suffix.toUpper());
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}
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}
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// Check by extension and type if this appears to be a loadable image
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bool IconProvider::loadCheck(const QFileInfo &info) const
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{
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if (info.isFile() && info.isReadable()) {
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const QString suffix = info.suffix();
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if (!suffix.isEmpty())
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return m_imageFormats.contains(suffix);
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}
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return false;
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}
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QImage IconProvider::loadImage(const QString &fileName) const
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{
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QFile file(fileName);
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if (file.open(QIODevice::ReadOnly)) {
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QImageReader imgReader(&file);
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if (imgReader.canRead()) {
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QImage image;
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if (imgReader.read(&image))
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return image;
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}
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}
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return QImage();
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}
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QIcon IconProvider::icon (const QFileInfo &info) const
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{
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// Don't get stuck on large images.
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const qint64 maxSize = 131072;
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if (loadCheck(info) && info.size() < maxSize) {
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const QImage image = loadImage(info.absoluteFilePath());
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if (!image.isNull())
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return QIcon(QPixmap::fromImage(image, Qt::ThresholdDither|Qt::AutoColor));
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}
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return QFileIconProvider::icon(info);
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}
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// ---------------- DialogGui
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DialogGui::DialogGui() :
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m_iconProvider(0)
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{
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}
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DialogGui::~DialogGui()
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{
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delete m_iconProvider;
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}
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QFileIconProvider *DialogGui::ensureIconProvider()
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{
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if (!m_iconProvider)
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m_iconProvider = new IconProvider;
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return m_iconProvider;
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}
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QMessageBox::StandardButton
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DialogGui::message(QWidget *parent, Message /*context*/, QMessageBox::Icon icon,
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const QString &title, const QString &text, QMessageBox::StandardButtons buttons,
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QMessageBox::StandardButton defaultButton)
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{
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QMessageBox::StandardButton rc = QMessageBox::NoButton;
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switch (icon) {
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case QMessageBox::Information:
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rc = QMessageBox::information(parent, title, text, buttons, defaultButton);
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break;
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case QMessageBox::Warning:
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rc = QMessageBox::warning(parent, title, text, buttons, defaultButton);
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break;
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case QMessageBox::Critical:
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rc = QMessageBox::critical(parent, title, text, buttons, defaultButton);
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break;
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case QMessageBox::Question:
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rc = QMessageBox::question(parent, title, text, buttons, defaultButton);
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break;
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case QMessageBox::NoIcon:
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break;
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}
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return rc;
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}
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QMessageBox::StandardButton
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DialogGui::message(QWidget *parent, Message /*context*/, QMessageBox::Icon icon,
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const QString &title, const QString &text, const QString &informativeText,
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QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton)
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{
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QMessageBox msgBox(icon, title, text, buttons, parent);
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msgBox.setDefaultButton(defaultButton);
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msgBox.setInformativeText(informativeText);
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return static_cast<QMessageBox::StandardButton>(msgBox.exec());
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}
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QMessageBox::StandardButton
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DialogGui::message(QWidget *parent, Message /*context*/, QMessageBox::Icon icon,
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const QString &title, const QString &text, const QString &informativeText, const QString &detailedText,
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QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton)
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{
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QMessageBox msgBox(icon, title, text, buttons, parent);
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msgBox.setDefaultButton(defaultButton);
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msgBox.setInformativeText(informativeText);
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msgBox.setDetailedText(detailedText);
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return static_cast<QMessageBox::StandardButton>(msgBox.exec());
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}
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QString DialogGui::getExistingDirectory(QWidget *parent, const QString &caption, const QString &dir, QFileDialog::Options options)
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{
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return QFileDialog::getExistingDirectory(parent, caption, dir, options);
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}
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QString DialogGui::getOpenFileName(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options)
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{
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return QFileDialog::getOpenFileName(parent, caption, dir, filter, selectedFilter, options);
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}
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QStringList DialogGui::getOpenFileNames(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options)
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{
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return QFileDialog::getOpenFileNames(parent, caption, dir, filter, selectedFilter, options);
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}
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QString DialogGui::getSaveFileName(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options)
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{
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return QFileDialog::getSaveFileName(parent, caption, dir, filter, selectedFilter, options);
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}
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void DialogGui::initializeImageFileDialog(QFileDialog &fileDialog, QFileDialog::Options options, QFileDialog::FileMode fm)
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{
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fileDialog.setConfirmOverwrite( !(options & QFileDialog::DontConfirmOverwrite) );
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fileDialog.setResolveSymlinks( !(options & QFileDialog::DontResolveSymlinks) );
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fileDialog.setIconProvider(ensureIconProvider());
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fileDialog.setFileMode(fm);
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}
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QString DialogGui::getOpenImageFileName(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options )
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{
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#ifdef IMAGE_PREVIEW
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QFileDialog fileDialog(parent, caption, dir, filter);
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initializeImageFileDialog(fileDialog, options, QFileDialog::ExistingFile);
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if (fileDialog.exec() != QDialog::Accepted)
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return QString();
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const QStringList selectedFiles = fileDialog.selectedFiles();
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if (selectedFiles.empty())
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return QString();
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if (selectedFilter)
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*selectedFilter = fileDialog.selectedFilter();
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return selectedFiles.front();
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#else
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return getOpenFileName(parent, caption, dir, filter, selectedFilter, options);
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#endif
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}
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QStringList DialogGui::getOpenImageFileNames(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options )
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{
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#ifdef IMAGE_PREVIEW
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QFileDialog fileDialog(parent, caption, dir, filter);
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initializeImageFileDialog(fileDialog, options, QFileDialog::ExistingFiles);
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if (fileDialog.exec() != QDialog::Accepted)
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return QStringList();
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const QStringList selectedFiles = fileDialog.selectedFiles();
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if (!selectedFiles.empty() && selectedFilter)
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*selectedFilter = fileDialog.selectedFilter();
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return selectedFiles;
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#else
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return getOpenFileNames(parent, caption, dir, filter, selectedFilter, options);
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#endif
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}
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}
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QT_END_NAMESPACE
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