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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "dialoggui_p.h"
#include <QtWidgets/qfileiconprovider.h>
#include <QtGui/qicon.h>
#include <QtGui/qimage.h>
#include <QtGui/qimagereader.h>
#include <QtGui/qpixmap.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qfile.h>
#include <QtCore/qset.h>
// QFileDialog on X11 does not provide an image preview. Display icons.
#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
# define IMAGE_PREVIEW
#endif
QT_BEGIN_NAMESPACE
namespace qdesigner_internal {
// Icon provider that reads out the known image formats
class IconProvider : public QFileIconProvider {
Q_DISABLE_COPY_MOVE(IconProvider)
public:
IconProvider();
QIcon icon (const QFileInfo &info) const override;
inline bool loadCheck(const QFileInfo &info) const;
QImage loadImage(const QString &fileName) const;
private:
QSet<QString> m_imageFormats;
};
IconProvider::IconProvider()
{
// Determine a list of readable extensions (upper and lower case)
const auto &fmts = QImageReader::supportedImageFormats();
for (const QByteArray &fmt : fmts) {
const QString suffix = QString::fromUtf8(fmt);
m_imageFormats.insert(suffix.toLower());
m_imageFormats.insert(suffix.toUpper());
}
}
// Check by extension and type if this appears to be a loadable image
bool IconProvider::loadCheck(const QFileInfo &info) const
{
if (info.isFile() && info.isReadable()) {
const QString suffix = info.suffix();
if (!suffix.isEmpty())
return m_imageFormats.contains(suffix);
}
return false;
}
QImage IconProvider::loadImage(const QString &fileName) const
{
QFile file(fileName);
if (file.open(QIODevice::ReadOnly)) {
QImageReader imgReader(&file);
if (imgReader.canRead()) {
QImage image;
if (imgReader.read(&image))
return image;
}
}
return QImage();
}
QIcon IconProvider::icon (const QFileInfo &info) const
{
// Don't get stuck on large images.
const qint64 maxSize = 131072;
if (loadCheck(info) && info.size() < maxSize) {
const QImage image = loadImage(info.absoluteFilePath());
if (!image.isNull())
return QIcon(QPixmap::fromImage(image, Qt::ThresholdDither|Qt::AutoColor));
}
return QFileIconProvider::icon(info);
}
// ---------------- DialogGui
DialogGui::DialogGui() = default;
DialogGui::~DialogGui()
{
delete m_iconProvider;
}
QFileIconProvider *DialogGui::ensureIconProvider()
{
if (!m_iconProvider)
m_iconProvider = new IconProvider;
return m_iconProvider;
}
QMessageBox::StandardButton
DialogGui::message(QWidget *parent, Message /*context*/, QMessageBox::Icon icon,
const QString &title, const QString &text, QMessageBox::StandardButtons buttons,
QMessageBox::StandardButton defaultButton)
{
QMessageBox::StandardButton rc = QMessageBox::NoButton;
switch (icon) {
case QMessageBox::Information:
rc = QMessageBox::information(parent, title, text, buttons, defaultButton);
break;
case QMessageBox::Warning:
rc = QMessageBox::warning(parent, title, text, buttons, defaultButton);
break;
case QMessageBox::Critical:
rc = QMessageBox::critical(parent, title, text, buttons, defaultButton);
break;
case QMessageBox::Question:
rc = QMessageBox::question(parent, title, text, buttons, defaultButton);
break;
case QMessageBox::NoIcon:
break;
}
return rc;
}
QMessageBox::StandardButton
DialogGui::message(QWidget *parent, Message /*context*/, QMessageBox::Icon icon,
const QString &title, const QString &text, const QString &informativeText,
QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton)
{
QMessageBox msgBox(icon, title, text, buttons, parent);
msgBox.setDefaultButton(defaultButton);
msgBox.setInformativeText(informativeText);
return static_cast<QMessageBox::StandardButton>(msgBox.exec());
}
QMessageBox::StandardButton
DialogGui::message(QWidget *parent, Message /*context*/, QMessageBox::Icon icon,
const QString &title, const QString &text, const QString &informativeText, const QString &detailedText,
QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton)
{
QMessageBox msgBox(icon, title, text, buttons, parent);
msgBox.setDefaultButton(defaultButton);
msgBox.setInformativeText(informativeText);
msgBox.setDetailedText(detailedText);
return static_cast<QMessageBox::StandardButton>(msgBox.exec());
}
QString DialogGui::getExistingDirectory(QWidget *parent, const QString &caption, const QString &dir, QFileDialog::Options options)
{
return QFileDialog::getExistingDirectory(parent, caption, dir, options);
}
QString DialogGui::getOpenFileName(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options)
{
return QFileDialog::getOpenFileName(parent, caption, dir, filter, selectedFilter, options);
}
QStringList DialogGui::getOpenFileNames(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options)
{
return QFileDialog::getOpenFileNames(parent, caption, dir, filter, selectedFilter, options);
}
QString DialogGui::getSaveFileName(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options)
{
return QFileDialog::getSaveFileName(parent, caption, dir, filter, selectedFilter, options);
}
void DialogGui::initializeImageFileDialog(QFileDialog &fileDialog, QFileDialog::Options options, QFileDialog::FileMode fm)
{
fileDialog.setOption(QFileDialog::DontConfirmOverwrite, options.testFlag(QFileDialog::DontConfirmOverwrite));
fileDialog.setOption(QFileDialog::DontResolveSymlinks, options.testFlag(QFileDialog::DontResolveSymlinks));
fileDialog.setIconProvider(ensureIconProvider());
fileDialog.setFileMode(fm);
}
QString DialogGui::getOpenImageFileName(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options )
{
#ifdef IMAGE_PREVIEW
QFileDialog fileDialog(parent, caption, dir, filter);
initializeImageFileDialog(fileDialog, options, QFileDialog::ExistingFile);
if (fileDialog.exec() != QDialog::Accepted)
return QString();
const QStringList selectedFiles = fileDialog.selectedFiles();
if (selectedFiles.isEmpty())
return QString();
if (selectedFilter)
*selectedFilter = fileDialog.selectedNameFilter();
return selectedFiles.constFirst();
#else
return getOpenFileName(parent, caption, dir, filter, selectedFilter, options);
#endif
}
QStringList DialogGui::getOpenImageFileNames(QWidget *parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options )
{
#ifdef IMAGE_PREVIEW
QFileDialog fileDialog(parent, caption, dir, filter);
initializeImageFileDialog(fileDialog, options, QFileDialog::ExistingFiles);
if (fileDialog.exec() != QDialog::Accepted)
return QStringList();
const QStringList selectedFiles = fileDialog.selectedFiles();
if (!selectedFiles.isEmpty() && selectedFilter)
*selectedFilter = fileDialog.selectedNameFilter();
return selectedFiles;
#else
return getOpenFileNames(parent, caption, dir, filter, selectedFilter, options);
#endif
}
}
QT_END_NAMESPACE
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