diff options
Diffstat (limited to 'examples/widgets/widgets/imageviewer')
-rw-r--r-- | examples/widgets/widgets/imageviewer/CMakeLists.txt | 47 | ||||
-rw-r--r-- | examples/widgets/widgets/imageviewer/imageviewer.cpp | 363 | ||||
-rw-r--r-- | examples/widgets/widgets/imageviewer/imageviewer.h | 74 | ||||
-rw-r--r-- | examples/widgets/widgets/imageviewer/imageviewer.pro | 11 | ||||
-rw-r--r-- | examples/widgets/widgets/imageviewer/main.cpp | 24 |
5 files changed, 0 insertions, 519 deletions
diff --git a/examples/widgets/widgets/imageviewer/CMakeLists.txt b/examples/widgets/widgets/imageviewer/CMakeLists.txt deleted file mode 100644 index 7f415f2d43..0000000000 --- a/examples/widgets/widgets/imageviewer/CMakeLists.txt +++ /dev/null @@ -1,47 +0,0 @@ -cmake_minimum_required(VERSION 3.16) -project(imageviewer LANGUAGES CXX) - -set(CMAKE_AUTOMOC ON) - -if(NOT DEFINED INSTALL_EXAMPLESDIR) - set(INSTALL_EXAMPLESDIR "examples") -endif() - -set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/widgets/imageviewer") - -find_package(Qt6 - REQUIRED COMPONENTS Core Gui Widgets - OPTIONAL_COMPONENTS PrintSupport -) - -qt_add_executable(imageviewer - imageviewer.cpp imageviewer.h - main.cpp -) - -set_target_properties(imageviewer PROPERTIES - WIN32_EXECUTABLE TRUE - MACOSX_BUNDLE TRUE -) - -target_link_libraries(imageviewer PUBLIC - Qt::Core - Qt::Gui - Qt::Widgets -) - -if (TARGET Qt::PrintSupport) - target_link_libraries(imageviewer PUBLIC Qt::PrintSupport) -endif() - -if(TARGET Qt::PrintSupport) - target_link_libraries(imageviewer PUBLIC - Qt::PrintSupport - ) -endif() - -install(TARGETS imageviewer - RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}" - BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}" - LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}" -) diff --git a/examples/widgets/widgets/imageviewer/imageviewer.cpp b/examples/widgets/widgets/imageviewer/imageviewer.cpp deleted file mode 100644 index d2bffc01d5..0000000000 --- a/examples/widgets/widgets/imageviewer/imageviewer.cpp +++ /dev/null @@ -1,363 +0,0 @@ -// Copyright (C) 2016 The Qt Company Ltd. -// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause - -#include "imageviewer.h" - -#include <QApplication> -#include <QClipboard> -#include <QColorSpace> -#include <QDir> -#include <QFileDialog> -#include <QImageReader> -#include <QImageWriter> -#include <QLabel> -#include <QMenuBar> -#include <QMessageBox> -#include <QMimeData> -#include <QPainter> -#include <QScreen> -#include <QScrollArea> -#include <QScrollBar> -#include <QStandardPaths> -#include <QStatusBar> - -#if defined(QT_PRINTSUPPORT_LIB) -# include <QtPrintSupport/qtprintsupportglobal.h> - -# if QT_CONFIG(printdialog) -# include <QPrintDialog> -# endif -#endif - -//! [0] -ImageViewer::ImageViewer(QWidget *parent) - : QMainWindow(parent), imageLabel(new QLabel) - , scrollArea(new QScrollArea) -{ - imageLabel->setBackgroundRole(QPalette::Base); - imageLabel->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); - imageLabel->setScaledContents(true); - - scrollArea->setBackgroundRole(QPalette::Dark); - scrollArea->setWidget(imageLabel); - scrollArea->setVisible(false); - setCentralWidget(scrollArea); - - createActions(); - - resize(QGuiApplication::primaryScreen()->availableSize() * 3 / 5); -} - -//! [0] -//! [2] - -bool ImageViewer::loadFile(const QString &fileName) -{ - QImageReader reader(fileName); - reader.setAutoTransform(true); - const QImage newImage = reader.read(); - if (newImage.isNull()) { - QMessageBox::information(this, QGuiApplication::applicationDisplayName(), - tr("Cannot load %1: %2") - .arg(QDir::toNativeSeparators(fileName), reader.errorString())); - return false; - } -//! [2] - - setImage(newImage); - - setWindowFilePath(fileName); - - const QString description = image.colorSpace().isValid() - ? image.colorSpace().description() : tr("unknown"); - const QString message = tr("Opened \"%1\", %2x%3, Depth: %4 (%5)") - .arg(QDir::toNativeSeparators(fileName)).arg(image.width()).arg(image.height()) - .arg(image.depth()).arg(description); - statusBar()->showMessage(message); - return true; -} - -void ImageViewer::setImage(const QImage &newImage) -{ - image = newImage; - if (image.colorSpace().isValid()) - image.convertToColorSpace(QColorSpace::SRgb); - imageLabel->setPixmap(QPixmap::fromImage(image)); -//! [4] - scaleFactor = 1.0; - - scrollArea->setVisible(true); - printAct->setEnabled(true); - fitToWindowAct->setEnabled(true); - updateActions(); - - if (!fitToWindowAct->isChecked()) - imageLabel->adjustSize(); -} - -//! [4] - -bool ImageViewer::saveFile(const QString &fileName) -{ - QImageWriter writer(fileName); - - if (!writer.write(image)) { - QMessageBox::information(this, QGuiApplication::applicationDisplayName(), - tr("Cannot write %1: %2") - .arg(QDir::toNativeSeparators(fileName), writer.errorString())); - return false; - } - const QString message = tr("Wrote \"%1\"").arg(QDir::toNativeSeparators(fileName)); - statusBar()->showMessage(message); - return true; -} - -//! [1] - -static void initializeImageFileDialog(QFileDialog &dialog, QFileDialog::AcceptMode acceptMode) -{ - static bool firstDialog = true; - - if (firstDialog) { - firstDialog = false; - const QStringList picturesLocations = QStandardPaths::standardLocations(QStandardPaths::PicturesLocation); - dialog.setDirectory(picturesLocations.isEmpty() ? QDir::currentPath() : picturesLocations.last()); - } - - QStringList mimeTypeFilters; - const QByteArrayList supportedMimeTypes = acceptMode == QFileDialog::AcceptOpen - ? QImageReader::supportedMimeTypes() : QImageWriter::supportedMimeTypes(); - for (const QByteArray &mimeTypeName : supportedMimeTypes) - mimeTypeFilters.append(mimeTypeName); - mimeTypeFilters.sort(); - dialog.setMimeTypeFilters(mimeTypeFilters); - dialog.selectMimeTypeFilter("image/jpeg"); - dialog.setAcceptMode(acceptMode); - if (acceptMode == QFileDialog::AcceptSave) - dialog.setDefaultSuffix("jpg"); -} - -void ImageViewer::open() -{ - QFileDialog dialog(this, tr("Open File")); - initializeImageFileDialog(dialog, QFileDialog::AcceptOpen); - - while (dialog.exec() == QDialog::Accepted && !loadFile(dialog.selectedFiles().constFirst())) {} -} -//! [1] - -void ImageViewer::saveAs() -{ - QFileDialog dialog(this, tr("Save File As")); - initializeImageFileDialog(dialog, QFileDialog::AcceptSave); - - while (dialog.exec() == QDialog::Accepted && !saveFile(dialog.selectedFiles().constFirst())) {} -} - -//! [5] -void ImageViewer::print() -//! [5] //! [6] -{ - Q_ASSERT(!imageLabel->pixmap(Qt::ReturnByValue).isNull()); -#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog) -//! [6] //! [7] - QPrintDialog dialog(&printer, this); -//! [7] //! [8] - if (dialog.exec()) { - QPainter painter(&printer); - QPixmap pixmap = imageLabel->pixmap(Qt::ReturnByValue); - QRect rect = painter.viewport(); - QSize size = pixmap.size(); - size.scale(rect.size(), Qt::KeepAspectRatio); - painter.setViewport(rect.x(), rect.y(), size.width(), size.height()); - painter.setWindow(pixmap.rect()); - painter.drawPixmap(0, 0, pixmap); - } -#endif -} -//! [8] - -void ImageViewer::copy() -{ -#ifndef QT_NO_CLIPBOARD - QGuiApplication::clipboard()->setImage(image); -#endif // !QT_NO_CLIPBOARD -} - -#ifndef QT_NO_CLIPBOARD -static QImage clipboardImage() -{ - if (const QMimeData *mimeData = QGuiApplication::clipboard()->mimeData()) { - if (mimeData->hasImage()) { - const QImage image = qvariant_cast<QImage>(mimeData->imageData()); - if (!image.isNull()) - return image; - } - } - return QImage(); -} -#endif // !QT_NO_CLIPBOARD - -void ImageViewer::paste() -{ -#ifndef QT_NO_CLIPBOARD - const QImage newImage = clipboardImage(); - if (newImage.isNull()) { - statusBar()->showMessage(tr("No image in clipboard")); - } else { - setImage(newImage); - setWindowFilePath(QString()); - const QString message = tr("Obtained image from clipboard, %1x%2, Depth: %3") - .arg(newImage.width()).arg(newImage.height()).arg(newImage.depth()); - statusBar()->showMessage(message); - } -#endif // !QT_NO_CLIPBOARD -} - -//! [9] -void ImageViewer::zoomIn() -//! [9] //! [10] -{ - scaleImage(1.25); -} - -void ImageViewer::zoomOut() -{ - scaleImage(0.8); -} - -//! [10] //! [11] -void ImageViewer::normalSize() -//! [11] //! [12] -{ - imageLabel->adjustSize(); - scaleFactor = 1.0; -} -//! [12] - -//! [13] -void ImageViewer::fitToWindow() -//! [13] //! [14] -{ - bool fitToWindow = fitToWindowAct->isChecked(); - scrollArea->setWidgetResizable(fitToWindow); - if (!fitToWindow) - normalSize(); - updateActions(); -} -//! [14] - - -//! [15] -void ImageViewer::about() -//! [15] //! [16] -{ - QMessageBox::about(this, tr("About Image Viewer"), - tr("<p>The <b>Image Viewer</b> example shows how to combine QLabel " - "and QScrollArea to display an image. QLabel is typically used " - "for displaying a text, but it can also display an image. " - "QScrollArea provides a scrolling view around another widget. " - "If the child widget exceeds the size of the frame, QScrollArea " - "automatically provides scroll bars. </p><p>The example " - "demonstrates how QLabel's ability to scale its contents " - "(QLabel::scaledContents), and QScrollArea's ability to " - "automatically resize its contents " - "(QScrollArea::widgetResizable), can be used to implement " - "zooming and scaling features. </p><p>In addition the example " - "shows how to use QPainter to print an image.</p>")); -} -//! [16] - -//! [17] -void ImageViewer::createActions() -//! [17] //! [18] -{ - QMenu *fileMenu = menuBar()->addMenu(tr("&File")); - - QAction *openAct = fileMenu->addAction(tr("&Open..."), this, &ImageViewer::open); - openAct->setShortcut(QKeySequence::Open); - - saveAsAct = fileMenu->addAction(tr("&Save As..."), this, &ImageViewer::saveAs); - saveAsAct->setEnabled(false); - - printAct = fileMenu->addAction(tr("&Print..."), this, &ImageViewer::print); - printAct->setShortcut(QKeySequence::Print); - printAct->setEnabled(false); - - fileMenu->addSeparator(); - - QAction *exitAct = fileMenu->addAction(tr("E&xit"), this, &QWidget::close); - exitAct->setShortcut(tr("Ctrl+Q")); - - QMenu *editMenu = menuBar()->addMenu(tr("&Edit")); - - copyAct = editMenu->addAction(tr("&Copy"), this, &ImageViewer::copy); - copyAct->setShortcut(QKeySequence::Copy); - copyAct->setEnabled(false); - - QAction *pasteAct = editMenu->addAction(tr("&Paste"), this, &ImageViewer::paste); - pasteAct->setShortcut(QKeySequence::Paste); - - QMenu *viewMenu = menuBar()->addMenu(tr("&View")); - - zoomInAct = viewMenu->addAction(tr("Zoom &In (25%)"), this, &ImageViewer::zoomIn); - zoomInAct->setShortcut(QKeySequence::ZoomIn); - zoomInAct->setEnabled(false); - - zoomOutAct = viewMenu->addAction(tr("Zoom &Out (25%)"), this, &ImageViewer::zoomOut); - zoomOutAct->setShortcut(QKeySequence::ZoomOut); - zoomOutAct->setEnabled(false); - - normalSizeAct = viewMenu->addAction(tr("&Normal Size"), this, &ImageViewer::normalSize); - normalSizeAct->setShortcut(tr("Ctrl+S")); - normalSizeAct->setEnabled(false); - - viewMenu->addSeparator(); - - fitToWindowAct = viewMenu->addAction(tr("&Fit to Window"), this, &ImageViewer::fitToWindow); - fitToWindowAct->setEnabled(false); - fitToWindowAct->setCheckable(true); - fitToWindowAct->setShortcut(tr("Ctrl+F")); - - QMenu *helpMenu = menuBar()->addMenu(tr("&Help")); - - helpMenu->addAction(tr("&About"), this, &ImageViewer::about); - helpMenu->addAction(tr("About &Qt"), this, &QApplication::aboutQt); -} -//! [18] - -//! [21] -void ImageViewer::updateActions() -//! [21] //! [22] -{ - saveAsAct->setEnabled(!image.isNull()); - copyAct->setEnabled(!image.isNull()); - zoomInAct->setEnabled(!fitToWindowAct->isChecked()); - zoomOutAct->setEnabled(!fitToWindowAct->isChecked()); - normalSizeAct->setEnabled(!fitToWindowAct->isChecked()); -} -//! [22] - -//! [23] -void ImageViewer::scaleImage(double factor) -//! [23] //! [24] -{ - scaleFactor *= factor; - imageLabel->resize(scaleFactor * imageLabel->pixmap(Qt::ReturnByValue).size()); - - adjustScrollBar(scrollArea->horizontalScrollBar(), factor); - adjustScrollBar(scrollArea->verticalScrollBar(), factor); - - zoomInAct->setEnabled(scaleFactor < 3.0); - zoomOutAct->setEnabled(scaleFactor > 0.333); -} -//! [24] - -//! [25] -void ImageViewer::adjustScrollBar(QScrollBar *scrollBar, double factor) -//! [25] //! [26] -{ - scrollBar->setValue(int(factor * scrollBar->value() - + ((factor - 1) * scrollBar->pageStep()/2))); -} -//! [26] diff --git a/examples/widgets/widgets/imageviewer/imageviewer.h b/examples/widgets/widgets/imageviewer/imageviewer.h deleted file mode 100644 index e9e6858c74..0000000000 --- a/examples/widgets/widgets/imageviewer/imageviewer.h +++ /dev/null @@ -1,74 +0,0 @@ -// Copyright (C) 2016 The Qt Company Ltd. -// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause - -#ifndef IMAGEVIEWER_H -#define IMAGEVIEWER_H - -#include <QMainWindow> -#include <QImage> -#if defined(QT_PRINTSUPPORT_LIB) -# include <QtPrintSupport/qtprintsupportglobal.h> - -# if QT_CONFIG(printer) -# include <QPrinter> -# endif -#endif - -QT_BEGIN_NAMESPACE -class QAction; -class QLabel; -class QMenu; -class QScrollArea; -class QScrollBar; -QT_END_NAMESPACE - -//! [0] -class ImageViewer : public QMainWindow -{ - Q_OBJECT - -public: - ImageViewer(QWidget *parent = nullptr); - bool loadFile(const QString &); - -private slots: - void open(); - void saveAs(); - void print(); - void copy(); - void paste(); - void zoomIn(); - void zoomOut(); - void normalSize(); - void fitToWindow(); - void about(); - -private: - void createActions(); - void createMenus(); - void updateActions(); - bool saveFile(const QString &fileName); - void setImage(const QImage &newImage); - void scaleImage(double factor); - void adjustScrollBar(QScrollBar *scrollBar, double factor); - - QImage image; - QLabel *imageLabel; - QScrollArea *scrollArea; - double scaleFactor = 1; - -#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer) - QPrinter printer; -#endif - - QAction *saveAsAct; - QAction *printAct; - QAction *copyAct; - QAction *zoomInAct; - QAction *zoomOutAct; - QAction *normalSizeAct; - QAction *fitToWindowAct; -}; -//! [0] - -#endif diff --git a/examples/widgets/widgets/imageviewer/imageviewer.pro b/examples/widgets/widgets/imageviewer/imageviewer.pro deleted file mode 100644 index d3db63ec20..0000000000 --- a/examples/widgets/widgets/imageviewer/imageviewer.pro +++ /dev/null @@ -1,11 +0,0 @@ -QT += widgets -requires(qtConfig(filedialog)) -qtHaveModule(printsupport): QT += printsupport - -HEADERS = imageviewer.h -SOURCES = imageviewer.cpp \ - main.cpp - -# install -target.path = $$[QT_INSTALL_EXAMPLES]/widgets/widgets/imageviewer -INSTALLS += target diff --git a/examples/widgets/widgets/imageviewer/main.cpp b/examples/widgets/widgets/imageviewer/main.cpp deleted file mode 100644 index 013f7d8689..0000000000 --- a/examples/widgets/widgets/imageviewer/main.cpp +++ /dev/null @@ -1,24 +0,0 @@ -// Copyright (C) 2016 The Qt Company Ltd. -// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause - -#include <QApplication> -#include <QCommandLineParser> - -#include "imageviewer.h" - -int main(int argc, char *argv[]) -{ - QApplication app(argc, argv); - QGuiApplication::setApplicationDisplayName(ImageViewer::tr("Image Viewer")); - QCommandLineParser commandLineParser; - commandLineParser.addHelpOption(); - commandLineParser.addPositionalArgument(ImageViewer::tr("[file]"), ImageViewer::tr("Image file to open.")); - commandLineParser.process(QCoreApplication::arguments()); - ImageViewer imageViewer; - if (!commandLineParser.positionalArguments().isEmpty() - && !imageViewer.loadFile(commandLineParser.positionalArguments().constFirst())) { - return -1; - } - imageViewer.show(); - return app.exec(); -} |