diff options
Diffstat (limited to 'examples/svg/svgviewer/exportdialog.cpp')
| -rw-r--r-- | examples/svg/svgviewer/exportdialog.cpp | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/examples/svg/svgviewer/exportdialog.cpp b/examples/svg/svgviewer/exportdialog.cpp new file mode 100644 index 0000000..04c9e12 --- /dev/null +++ b/examples/svg/svgviewer/exportdialog.cpp @@ -0,0 +1,208 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "exportdialog.h" + +#include <QApplication> +#include <QDesktopWidget> +#include <QDialogButtonBox> +#include <QFileDialog> +#include <QFormLayout> +#include <QHBoxLayout> +#include <QMessageBox> +#include <QLabel> +#include <QLineEdit> +#include <QPushButton> +#include <QSpinBox> +#include <QToolButton> +#include <QVBoxLayout> + +#include <QImageWriter> + +#include <QDebug> + +#include <QDir> +#include <QFileInfo> + +enum { exportMinimumSize = 1, exportMaximumSize = 2000 }; + +ExportDialog::ExportDialog(QWidget *parent) + : QDialog(parent) + , m_fileNameLineEdit(new QLineEdit(this)) + , m_widthSpinBox(new QSpinBox(this)) + , m_heightSpinBox(new QSpinBox(this)) + , m_aspectRatio(1) +{ + typedef void (QSpinBox::*QSpinBoxIntSignal)(int); + + setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint); + setWindowTitle(tr("Export")); + + QFormLayout *formLayout = new QFormLayout(this); + + QHBoxLayout *fileLayout = new QHBoxLayout; + fileLayout->addWidget(m_fileNameLineEdit); + m_fileNameLineEdit->setMinimumWidth(QApplication::desktop()->availableGeometry(this).width() / 6); + QPushButton *browseButton = new QPushButton(tr("Browse..."), this); + fileLayout->addWidget(browseButton); + connect(browseButton, &QAbstractButton::clicked, this, &ExportDialog::browse); + formLayout->addRow(tr("File:"), fileLayout); + + QHBoxLayout *sizeLayout = new QHBoxLayout; + sizeLayout->addStretch(); + m_widthSpinBox->setMinimum(exportMinimumSize); + m_widthSpinBox->setMaximum(exportMaximumSize); + connect(m_widthSpinBox, static_cast<QSpinBoxIntSignal>(&QSpinBox::valueChanged), + this, &ExportDialog::exportWidthChanged); + sizeLayout->addWidget(m_widthSpinBox); + //: Multiplication, as in 32x32 + sizeLayout->addWidget(new QLabel(tr("x"))); + m_heightSpinBox->setMinimum(exportMinimumSize); + m_heightSpinBox->setMaximum(exportMaximumSize); + connect(m_heightSpinBox, static_cast<QSpinBoxIntSignal>(&QSpinBox::valueChanged), + this, &ExportDialog::exportHeightChanged); + sizeLayout->addWidget(m_heightSpinBox); + QToolButton *resetButton = new QToolButton(this); + resetButton->setIcon(QIcon(":/qt-project.org/styles/commonstyle/images/refresh-32.png")); + sizeLayout->addWidget(resetButton); + connect(resetButton, &QAbstractButton::clicked, this, &ExportDialog::resetExportSize); + formLayout->addRow(tr("Size:"), sizeLayout); + + QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, this); + connect(buttonBox, &QDialogButtonBox::accepted, this, &QDialog::accept); + connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject); + formLayout->addRow(buttonBox); +} + +void ExportDialog::accept() +{ + const QString fileName = exportFileName(); + if (fileName.isEmpty()) { + QMessageBox::warning(this, windowTitle(), tr("Please enter a file name")); + return; + } + QFileInfo fi(fileName); + if (fi.exists()) { + const QString question = tr("%1 already exists.\nWould you like to overwrite it?").arg(QDir::toNativeSeparators(fileName)); + if (QMessageBox::question(this, windowTitle(), question, QMessageBox::Yes | QMessageBox::No) != QMessageBox::Yes) + return; + } + QDialog::accept(); +} + +QSize ExportDialog::exportSize() const +{ + return QSize(m_widthSpinBox->value(), m_heightSpinBox->value()); +} + +void ExportDialog::setExportSize(const QSize &size) +{ + m_defaultSize = size; + QSizeF defaultSizeF(m_defaultSize); + m_aspectRatio = defaultSizeF.width() / defaultSizeF.height(); + setExportWidthBlocked(size.width()); + setExportHeightBlocked(size.height()); +} + +void ExportDialog::resetExportSize() +{ + setExportWidthBlocked(m_defaultSize.width()); + setExportHeightBlocked(m_defaultSize.height()); +} + +void ExportDialog::setExportWidthBlocked(int width) +{ + if (m_widthSpinBox->value() != width) { + const bool blockSignals = m_widthSpinBox->blockSignals(true); + m_widthSpinBox->setValue(width); + m_widthSpinBox->blockSignals(blockSignals); + } +} + +void ExportDialog::setExportHeightBlocked(int height) +{ + if (m_heightSpinBox->value() != height) { + const bool blockSignals = m_heightSpinBox->blockSignals(true); + m_heightSpinBox->setValue(height); + m_heightSpinBox->blockSignals(blockSignals); + } +} + +void ExportDialog::exportWidthChanged(int width) +{ + const bool square = m_defaultSize.width() == m_defaultSize.height(); + setExportHeightBlocked(square ? width : qRound(qreal(width) / m_aspectRatio)); +} + +void ExportDialog::exportHeightChanged(int height) +{ + const bool square = m_defaultSize.width() == m_defaultSize.height(); + setExportWidthBlocked(square ? height : qRound(qreal(height) * m_aspectRatio)); +} + +QString ExportDialog::exportFileName() const +{ + return QDir::cleanPath(m_fileNameLineEdit->text().trimmed()); +} + +void ExportDialog::setExportFileName(const QString &f) +{ + m_fileNameLineEdit->setText(QDir::toNativeSeparators(f)); +} + +void ExportDialog::browse() +{ + QFileDialog fileDialog(this); + fileDialog.setAcceptMode(QFileDialog::AcceptSave); + const QString fileName = exportFileName(); + if (!fileName.isEmpty()) + fileDialog.setDirectory(QFileInfo(fileName).absolutePath()); + QStringList mimeTypes; + foreach (const QByteArray &mimeType, QImageWriter::supportedMimeTypes()) + mimeTypes.append(QLatin1String(mimeType)); + fileDialog.setMimeTypeFilters(mimeTypes); + const int pngIndex = mimeTypes.indexOf("image/png"); + if (pngIndex >= 0) { + fileDialog.selectMimeTypeFilter(mimeTypes.at(pngIndex)); + fileDialog.setDefaultSuffix("png"); + } + if (fileDialog.exec() == QDialog::Accepted) + setExportFileName(fileDialog.selectedFiles().constFirst()); +} |