diff options
Diffstat (limited to 'tests/manual/examples/widgets/touch')
25 files changed, 1100 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/touch/dials/CMakeLists.txt b/tests/manual/examples/widgets/touch/dials/CMakeLists.txt new file mode 100644 index 0000000000..fd4b7859a9 --- /dev/null +++ b/tests/manual/examples/widgets/touch/dials/CMakeLists.txt @@ -0,0 +1,37 @@ +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +cmake_minimum_required(VERSION 3.16) +project(dials LANGUAGES CXX) + +if(NOT DEFINED INSTALL_EXAMPLESDIR) + set(INSTALL_EXAMPLESDIR "examples") +endif() + +set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/touch/dials") + +find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets) + +qt_standard_project_setup() + +qt_add_executable(dials + dials.ui + main.cpp +) + +set_target_properties(dials PROPERTIES + WIN32_EXECUTABLE TRUE + MACOSX_BUNDLE TRUE +) + +target_link_libraries(dials PRIVATE + Qt6::Core + Qt6::Gui + Qt6::Widgets +) + +install(TARGETS dials + RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}" + BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}" + LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}" +) diff --git a/tests/manual/examples/widgets/touch/dials/dials.pro b/tests/manual/examples/widgets/touch/dials/dials.pro new file mode 100644 index 0000000000..0e823551cc --- /dev/null +++ b/tests/manual/examples/widgets/touch/dials/dials.pro @@ -0,0 +1,8 @@ +QT += widgets + +SOURCES += main.cpp +FORMS += dials.ui + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/widgets/touch/dials +INSTALLS += target diff --git a/tests/manual/examples/widgets/touch/dials/dials.ui b/tests/manual/examples/widgets/touch/dials/dials.ui new file mode 100644 index 0000000000..8ca7ae9475 --- /dev/null +++ b/tests/manual/examples/widgets/touch/dials/dials.ui @@ -0,0 +1,77 @@ +<?xml version="1.0" encoding="UTF-8"?> +<ui version="4.0"> + <class>Dials</class> + <widget class="QWidget" name="Dials"> + <property name="geometry"> + <rect> + <x>0</x> + <y>0</y> + <width>400</width> + <height>300</height> + </rect> + </property> + <property name="windowTitle"> + <string>Form</string> + </property> + <layout class="QGridLayout" name="gridLayout"> + <item row="0" column="0"> + <widget class="QDial" name="dial_1"> + <property name="notchesVisible"> + <bool>true</bool> + </property> + </widget> + </item> + <item row="0" column="1"> + <widget class="QDial" name="dial_2"> + <property name="notchesVisible"> + <bool>true</bool> + </property> + </widget> + </item> + <item row="0" column="2"> + <widget class="QDial" name="dial_3"> + <property name="notchesVisible"> + <bool>true</bool> + </property> + </widget> + </item> + <item row="0" column="3"> + <widget class="QDial" name="dial_4"> + <property name="notchesVisible"> + <bool>true</bool> + </property> + </widget> + </item> + <item row="1" column="0"> + <widget class="QDial" name="dial_5"> + <property name="notchesVisible"> + <bool>true</bool> + </property> + </widget> + </item> + <item row="1" column="1"> + <widget class="QDial" name="dial_6"> + <property name="notchesVisible"> + <bool>true</bool> + </property> + </widget> + </item> + <item row="1" column="2"> + <widget class="QDial" name="dial_7"> + <property name="notchesVisible"> + <bool>true</bool> + </property> + </widget> + </item> + <item row="1" column="3"> + <widget class="QDial" name="dial_8"> + <property name="notchesVisible"> + <bool>true</bool> + </property> + </widget> + </item> + </layout> + </widget> + <resources/> + <connections/> +</ui> diff --git a/tests/manual/examples/widgets/touch/dials/doc/images/touch-dials-example.png b/tests/manual/examples/widgets/touch/dials/doc/images/touch-dials-example.png Binary files differnew file mode 100644 index 0000000000..60e1776fc3 --- /dev/null +++ b/tests/manual/examples/widgets/touch/dials/doc/images/touch-dials-example.png diff --git a/tests/manual/examples/widgets/touch/dials/doc/src/touch-dials.qdoc b/tests/manual/examples/widgets/touch/dials/doc/src/touch-dials.qdoc new file mode 100644 index 0000000000..448430ed79 --- /dev/null +++ b/tests/manual/examples/widgets/touch/dials/doc/src/touch-dials.qdoc @@ -0,0 +1,14 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only + +/*! + \example touch/dials + \title Touch Dials Example + \ingroup touchinputexamples + \brief Shows how to apply touch to a set of standard Qt widgets. + + The Touch Dials example shows how to apply touch to a set of + standard Qt widgets. + + \image touch-dials-example.png +*/ diff --git a/tests/manual/examples/widgets/touch/dials/main.cpp b/tests/manual/examples/widgets/touch/dials/main.cpp new file mode 100644 index 0000000000..63fdb7db3b --- /dev/null +++ b/tests/manual/examples/widgets/touch/dials/main.cpp @@ -0,0 +1,21 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include <QApplication> +#include <QWidget> +#include <QDial> + +#include "ui_dials.h" + +int main(int argc, char **argv) +{ + QApplication app(argc, argv); + QWidget window; + Ui::Dials dialsUi; + dialsUi.setupUi(&window); + const QList<QAbstractSlider *> sliders = window.findChildren<QAbstractSlider *>(); + for (QAbstractSlider *slider : sliders) + slider->setAttribute(Qt::WA_AcceptTouchEvents); + window.showMaximized(); + return app.exec(); +} diff --git a/tests/manual/examples/widgets/touch/fingerpaint/CMakeLists.txt b/tests/manual/examples/widgets/touch/fingerpaint/CMakeLists.txt new file mode 100644 index 0000000000..c06a91b53b --- /dev/null +++ b/tests/manual/examples/widgets/touch/fingerpaint/CMakeLists.txt @@ -0,0 +1,45 @@ +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +cmake_minimum_required(VERSION 3.16) +project(fingerpaint LANGUAGES CXX) + +if(NOT DEFINED INSTALL_EXAMPLESDIR) + set(INSTALL_EXAMPLESDIR "examples") +endif() + +set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/touch/fingerpaint") + +find_package(Qt6 + REQUIRED COMPONENTS Core Gui Widgets + OPTIONAL_COMPONENTS PrintSupport +) + +qt_standard_project_setup() + +qt_add_executable(fingerpaint + main.cpp + mainwindow.cpp mainwindow.h + scribblearea.cpp scribblearea.h +) + +set_target_properties(fingerpaint PROPERTIES + WIN32_EXECUTABLE TRUE + MACOSX_BUNDLE TRUE +) + +target_link_libraries(fingerpaint PRIVATE + Qt6::Core + Qt6::Gui + Qt6::Widgets +) + +if (TARGET Qt6::PrintSupport) + target_link_libraries(fingerpaint PRIVATE Qt6::PrintSupport) +endif() + +install(TARGETS fingerpaint + RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}" + BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}" + LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}" +) diff --git a/tests/manual/examples/widgets/touch/fingerpaint/doc/src/fingerpaint.qdoc b/tests/manual/examples/widgets/touch/fingerpaint/doc/src/fingerpaint.qdoc new file mode 100644 index 0000000000..0e3319004c --- /dev/null +++ b/tests/manual/examples/widgets/touch/fingerpaint/doc/src/fingerpaint.qdoc @@ -0,0 +1,18 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only + +/*! + \example touch/fingerpaint + \title Finger Paint Example + \ingroup touchinputexamples + \brief Shows the use of a touchscreen to make a simple painting application. + + The Finger Paint example shows the use of a touchscreen with a custom widget + to create a simple painting application. + + \image touch-fingerpaint-example.png + + This example was specifically designed to work with a touchscreen, using + QTouchEvent instead of QMouseEvent to handle user input over the custom + widget. As a result, it is not possible to draw with the mouse cursor. +*/ diff --git a/tests/manual/examples/widgets/touch/fingerpaint/fingerpaint.pro b/tests/manual/examples/widgets/touch/fingerpaint/fingerpaint.pro new file mode 100644 index 0000000000..6370da6607 --- /dev/null +++ b/tests/manual/examples/widgets/touch/fingerpaint/fingerpaint.pro @@ -0,0 +1,13 @@ +QT += widgets +requires(qtConfig(filedialog)) +qtHaveModule(printsupport): QT += printsupport + +HEADERS = mainwindow.h \ + scribblearea.h +SOURCES = main.cpp \ + mainwindow.cpp \ + scribblearea.cpp + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/widgets/touch/fingerpaint +INSTALLS += target diff --git a/tests/manual/examples/widgets/touch/fingerpaint/main.cpp b/tests/manual/examples/widgets/touch/fingerpaint/main.cpp new file mode 100644 index 0000000000..d283c7b85c --- /dev/null +++ b/tests/manual/examples/widgets/touch/fingerpaint/main.cpp @@ -0,0 +1,14 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include <QApplication> + +#include "mainwindow.h" + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + MainWindow window; + window.showMaximized(); + return app.exec(); +} diff --git a/tests/manual/examples/widgets/touch/fingerpaint/mainwindow.cpp b/tests/manual/examples/widgets/touch/fingerpaint/mainwindow.cpp new file mode 100644 index 0000000000..b9109fceeb --- /dev/null +++ b/tests/manual/examples/widgets/touch/fingerpaint/mainwindow.cpp @@ -0,0 +1,180 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include <QtWidgets> + +#include "mainwindow.h" +#include "scribblearea.h" + +//! [0] +MainWindow::MainWindow() +{ + scribbleArea = new ScribbleArea; + setCentralWidget(scribbleArea); + + createActions(); + createMenus(); + + setWindowTitle(tr("Finger Paint")); + resize(500, 500); +} +//! [0] + +//! [1] +void MainWindow::closeEvent(QCloseEvent *event) +//! [1] //! [2] +{ + if (maybeSave()) { + event->accept(); + } else { + event->ignore(); + } +} +//! [2] + +//! [3] +void MainWindow::open() +//! [3] //! [4] +{ + if (maybeSave()) { + QString fileName = QFileDialog::getOpenFileName(this, + tr("Open File"), QDir::currentPath()); + if (!fileName.isEmpty()) + scribbleArea->openImage(fileName); + } +} +//! [4] + +//! [5] +void MainWindow::save() +//! [5] //! [6] +{ + QAction *action = qobject_cast<QAction *>(sender()); + QByteArray fileFormat = action->data().toByteArray(); + saveFile(fileFormat); +} +//! [6] + +//! [11] +void MainWindow::about() +//! [11] //! [12] +{ + QMessageBox::about(this, tr("About Scribble"), + tr("<p>The <b>Scribble</b> example shows how to use QMainWindow as the " + "base widget for an application, and how to reimplement some of " + "QWidget's event handlers to receive the events generated for " + "the application's widgets:</p><p> We reimplement the mouse event " + "handlers to facilitate drawing, the paint event handler to " + "update the application and the resize event handler to optimize " + "the application's appearance. In addition we reimplement the " + "close event handler to intercept the close events before " + "terminating the application.</p><p> The example also demonstrates " + "how to use QPainter to draw an image in real time, as well as " + "to repaint widgets.</p>")); +} +//! [12] + +//! [13] +void MainWindow::createActions() +//! [13] //! [14] +{ + openAct = new QAction(tr("&Open..."), this); + openAct->setShortcut(tr("Ctrl+O")); + connect(openAct, &QAction::triggered, this, &MainWindow::open); + + const QList<QByteArray> imageFormats = QImageWriter::supportedImageFormats(); + for (const QByteArray &format : imageFormats) { + QString text = tr("%1...").arg(QString(format).toUpper()); + + QAction *action = new QAction(text, this); + action->setData(format); + connect(action, &QAction::triggered, this, &MainWindow::save); + saveAsActs.append(action); + } + + printAct = new QAction(tr("&Print..."), this); + connect(printAct, &QAction::triggered, scribbleArea, &ScribbleArea::print); + + exitAct = new QAction(tr("E&xit"), this); + exitAct->setShortcut(tr("Ctrl+Q")); + connect(exitAct, &QAction::triggered, this, &QWidget::close); + + clearScreenAct = new QAction(tr("&Clear Screen"), this); + clearScreenAct->setShortcut(tr("Ctrl+L")); + connect(clearScreenAct, &QAction::triggered, + scribbleArea, &ScribbleArea::clearImage); + + aboutAct = new QAction(tr("&About"), this); + connect(aboutAct, &QAction::triggered, this, &MainWindow::about); + + aboutQtAct = new QAction(tr("About &Qt"), this); + connect(aboutQtAct, &QAction::triggered, qApp, &QApplication::aboutQt); +} +//! [14] + +//! [15] +void MainWindow::createMenus() +//! [15] //! [16] +{ + saveAsMenu = new QMenu(tr("&Save As"), this); + saveAsMenu->addActions(saveAsActs); + + fileMenu = new QMenu(tr("&File"), this); + fileMenu->addAction(openAct); + fileMenu->addMenu(saveAsMenu); + fileMenu->addAction(printAct); + fileMenu->addSeparator(); + fileMenu->addAction(exitAct); + + optionMenu = new QMenu(tr("&Options"), this); + optionMenu->addAction(clearScreenAct); + + helpMenu = new QMenu(tr("&Help"), this); + helpMenu->addAction(aboutAct); + helpMenu->addAction(aboutQtAct); + + menuBar()->addMenu(fileMenu); + menuBar()->addMenu(optionMenu); + menuBar()->addMenu(helpMenu); +} +//! [16] + +//! [17] +bool MainWindow::maybeSave() +//! [17] //! [18] +{ + if (scribbleArea->isModified()) { + QMessageBox::StandardButton ret; + ret = QMessageBox::warning(this, tr("Scribble"), + tr("The image has been modified.\n" + "Do you want to save your changes?"), + QMessageBox::Save | QMessageBox::Discard + | QMessageBox::Cancel); + if (ret == QMessageBox::Save) { + return saveFile("png"); + } else if (ret == QMessageBox::Cancel) { + return false; + } + } + return true; +} +//! [18] + +//! [19] +bool MainWindow::saveFile(const QByteArray &fileFormat) +//! [19] //! [20] +{ + QString initialPath = QDir::currentPath() + "/untitled." + fileFormat; + + QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"), + initialPath, + tr("%1 Files (*.%2);;All Files (*)") + .arg(QString::fromLatin1(fileFormat.toUpper())) + .arg(QString::fromLatin1(fileFormat))); + if (fileName.isEmpty()) { + return false; + } else { + return scribbleArea->saveImage(fileName, fileFormat.constData()); + } +} +//! [20] diff --git a/tests/manual/examples/widgets/touch/fingerpaint/mainwindow.h b/tests/manual/examples/widgets/touch/fingerpaint/mainwindow.h new file mode 100644 index 0000000000..a4aac1e36b --- /dev/null +++ b/tests/manual/examples/widgets/touch/fingerpaint/mainwindow.h @@ -0,0 +1,51 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#ifndef MAINWINDOW_H +#define MAINWINDOW_H + +#include <QList> +#include <QMainWindow> + +class ScribbleArea; + +//! [0] +class MainWindow : public QMainWindow +{ + Q_OBJECT + +public: + MainWindow(); + +protected: + void closeEvent(QCloseEvent *event) override; + +private slots: + void open(); + void save(); + void about(); + +private: + void createActions(); + void createMenus(); + bool maybeSave(); + bool saveFile(const QByteArray &fileFormat); + + ScribbleArea *scribbleArea; + + QMenu *saveAsMenu; + QMenu *fileMenu; + QMenu *optionMenu; + QMenu *helpMenu; + + QAction *openAct; + QList<QAction *> saveAsActs; + QAction *exitAct; + QAction *printAct; + QAction *clearScreenAct; + QAction *aboutAct; + QAction *aboutQtAct; +}; +//! [0] + +#endif diff --git a/tests/manual/examples/widgets/touch/fingerpaint/scribblearea.cpp b/tests/manual/examples/widgets/touch/fingerpaint/scribblearea.cpp new file mode 100644 index 0000000000..fb5e62906b --- /dev/null +++ b/tests/manual/examples/widgets/touch/fingerpaint/scribblearea.cpp @@ -0,0 +1,190 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include <QtWidgets> +#if defined(QT_PRINTSUPPORT_LIB) +#include <QtPrintSupport/qtprintsupportglobal.h> +#if QT_CONFIG(printdialog) +#include <QPrinter> +#include <QPrintDialog> +#endif +#endif + +#include "scribblearea.h" + +static const qreal MinimumDiameter = 3.0; +static const qreal MaximumDiameter = 50.0; + +//! [0] +ScribbleArea::ScribbleArea(QWidget *parent) + : QWidget(parent) +{ + setAttribute(Qt::WA_AcceptTouchEvents); + setAttribute(Qt::WA_StaticContents); + modified = false; + + myPenColors + << QColor("green") + << QColor("purple") + << QColor("red") + << QColor("blue") + << QColor("yellow") + + << QColor("pink") + << QColor("orange") + << QColor("brown") + << QColor("grey") + << QColor("black"); +} +//! [0] + +//! [1] +bool ScribbleArea::openImage(const QString &fileName) +//! [1] //! [2] +{ + QImage loadedImage; + if (!loadedImage.load(fileName)) + return false; + + QSize newSize = loadedImage.size().expandedTo(size()); + resizeImage(&loadedImage, newSize); + image = loadedImage; + modified = false; + update(); + return true; +} +//! [2] + +//! [3] +bool ScribbleArea::saveImage(const QString &fileName, const char *fileFormat) +//! [3] //! [4] +{ + QImage visibleImage = image; + resizeImage(&visibleImage, size()); + + if (visibleImage.save(fileName, fileFormat)) { + modified = false; + return true; + } else { + return false; + } +} +//! [4] + +//! [9] +void ScribbleArea::clearImage() +//! [9] //! [10] +{ + image.fill(qRgb(255, 255, 255)); + modified = true; + update(); +} +//! [10] + +//! [12] //! [13] +void ScribbleArea::paintEvent(QPaintEvent *event) +//! [13] //! [14] +{ + QPainter painter(this); + const QRect rect = event->rect(); + painter.drawImage(rect.topLeft(), image, rect); +} +//! [14] + +//! [15] +void ScribbleArea::resizeEvent(QResizeEvent *event) +//! [15] //! [16] +{ + if (width() > image.width() || height() > image.height()) { + int newWidth = qMax(width() + 128, image.width()); + int newHeight = qMax(height() + 128, image.height()); + resizeImage(&image, QSize(newWidth, newHeight)); + update(); + } + QWidget::resizeEvent(event); +} +//! [16] + +//! [19] +void ScribbleArea::resizeImage(QImage *image, const QSize &newSize) +//! [19] //! [20] +{ + if (image->size() == newSize) + return; + + QImage newImage(newSize, QImage::Format_RGB32); + newImage.fill(qRgb(255, 255, 255)); + QPainter painter(&newImage); + painter.drawImage(QPoint(0, 0), *image); + *image = newImage; +} +//! [20] + +//! [21] +void ScribbleArea::print() +{ +#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog) + QPrinter printer(QPrinter::HighResolution); + + QPrintDialog printDialog(&printer, this); +//! [21] //! [22] + if (printDialog.exec() == QDialog::Accepted) { + QPainter painter(&printer); + QRect rect = painter.viewport(); + QSize size = image.size(); + size.scale(rect.size(), Qt::KeepAspectRatio); + painter.setViewport(rect.x(), rect.y(), size.width(), size.height()); + painter.setWindow(image.rect()); + painter.drawImage(0, 0, image); + } +#endif // QT_CONFIG(printdialog) +} +//! [22] + +bool ScribbleArea::event(QEvent *event) +{ + switch (event->type()) { + case QEvent::TouchBegin: + case QEvent::TouchUpdate: + case QEvent::TouchEnd: + { + const QTouchEvent *touch = static_cast<QTouchEvent *>(event); + const auto touchPoints = static_cast<QTouchEvent *>(event)->points(); + for (const QTouchEvent::TouchPoint &touchPoint : touchPoints) { + switch (touchPoint.state()) { + case QEventPoint::Stationary: + case QEventPoint::Released: + // don't do anything if this touch point hasn't moved or has been released + continue; + default: + { + QSizeF diams = touchPoint.ellipseDiameters(); + if (diams.isEmpty()) { + qreal diameter = MaximumDiameter; + if (touch->pointingDevice()->capabilities().testFlag(QPointingDevice::Capability::Pressure)) + diameter = MinimumDiameter + (MaximumDiameter - MinimumDiameter) * touchPoint.pressure(); + diams = QSizeF(diameter, diameter); + } + + QPainter painter(&image); + painter.setPen(Qt::NoPen); + painter.setBrush(myPenColors.at(touchPoint.id() % myPenColors.count())); + painter.drawEllipse(touchPoint.position(), diams.width() / 2, diams.height() / 2); + painter.end(); + + modified = true; + const int rad = 2; + QRectF rect(QPointF(), diams); + rect.moveCenter(touchPoint.position()); + update(rect.toRect().adjusted(-rad,-rad, +rad, +rad)); + } + break; + } + } + break; + } + default: + return QWidget::event(event); + } + return true; +} diff --git a/tests/manual/examples/widgets/touch/fingerpaint/scribblearea.h b/tests/manual/examples/widgets/touch/fingerpaint/scribblearea.h new file mode 100644 index 0000000000..624f07074a --- /dev/null +++ b/tests/manual/examples/widgets/touch/fingerpaint/scribblearea.h @@ -0,0 +1,43 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#ifndef SCRIBBLEAREA_H +#define SCRIBBLEAREA_H + +#include <QColor> +#include <QImage> +#include <QPoint> +#include <QWidget> + +//! [0] +class ScribbleArea : public QWidget +{ + Q_OBJECT + +public: + ScribbleArea(QWidget *parent = nullptr); + + bool openImage(const QString &fileName); + bool saveImage(const QString &fileName, const char *fileFormat); + + bool isModified() const { return modified; } + +public slots: + void clearImage(); + void print(); + +protected: + void paintEvent(QPaintEvent *event) override; + void resizeEvent(QResizeEvent *event) override; + bool event(QEvent *event) override; + +private: + void resizeImage(QImage *image, const QSize &newSize); + + bool modified; + QList<QColor> myPenColors; + QImage image; +}; +//! [0] + +#endif diff --git a/tests/manual/examples/widgets/touch/pinchzoom/CMakeLists.txt b/tests/manual/examples/widgets/touch/pinchzoom/CMakeLists.txt new file mode 100644 index 0000000000..8820d8d44b --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/CMakeLists.txt @@ -0,0 +1,50 @@ +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +cmake_minimum_required(VERSION 3.16) +project(pinchzoom LANGUAGES CXX) + +if(NOT DEFINED INSTALL_EXAMPLESDIR) + set(INSTALL_EXAMPLESDIR "examples") +endif() + +set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/touch/pinchzoom") + +find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets) + +qt_standard_project_setup() + +qt_add_executable(pinchzoom + graphicsview.cpp graphicsview.h + main.cpp + mouse.cpp mouse.h +) + +set_target_properties(pinchzoom PROPERTIES + WIN32_EXECUTABLE TRUE + MACOSX_BUNDLE TRUE +) + +target_link_libraries(pinchzoom PRIVATE + Qt6::Core + Qt6::Gui + Qt6::Widgets +) + +# Resources: +set(mice_resource_files + "images/cheese.jpg" +) + +qt_add_resources(pinchzoom "mice" + PREFIX + "/" + FILES + ${mice_resource_files} +) + +install(TARGETS pinchzoom + RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}" + BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}" + LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}" +) diff --git a/tests/manual/examples/widgets/touch/pinchzoom/doc/images/pinch-zoom-example.png b/tests/manual/examples/widgets/touch/pinchzoom/doc/images/pinch-zoom-example.png Binary files differnew file mode 100644 index 0000000000..7db51fbf55 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/doc/images/pinch-zoom-example.png diff --git a/tests/manual/examples/widgets/touch/pinchzoom/doc/src/pinchzoom.qdoc b/tests/manual/examples/widgets/touch/pinchzoom/doc/src/pinchzoom.qdoc new file mode 100644 index 0000000000..aef5c59407 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/doc/src/pinchzoom.qdoc @@ -0,0 +1,14 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only + +/*! + \example touch/pinchzoom + \title Pinch Zoom Example + \ingroup touchinputexamples + \brief Shows how to recognize a gesture. + + The Pinch Zoom example shows how to use low-level touch information + to recognize a gesture. + + \image touch-pinchzoom-example.png +*/ diff --git a/tests/manual/examples/widgets/touch/pinchzoom/graphicsview.cpp b/tests/manual/examples/widgets/touch/pinchzoom/graphicsview.cpp new file mode 100644 index 0000000000..61042e7e02 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/graphicsview.cpp @@ -0,0 +1,48 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include "graphicsview.h" + +#include <QScrollBar> +#include <QTouchEvent> + +GraphicsView::GraphicsView(QGraphicsScene *scene, QWidget *parent) + : QGraphicsView(scene, parent) +{ + viewport()->setAttribute(Qt::WA_AcceptTouchEvents); + setDragMode(ScrollHandDrag); +} + +bool GraphicsView::viewportEvent(QEvent *event) +{ + switch (event->type()) { + case QEvent::TouchBegin: + case QEvent::TouchUpdate: + case QEvent::TouchEnd: + { + QTouchEvent *touchEvent = static_cast<QTouchEvent *>(event); + const auto touchPoints = touchEvent->points(); + if (touchPoints.count() == 2) { + // determine scale factor + const QEventPoint &touchPoint0 = touchPoints.first(); + const QEventPoint &touchPoint1 = touchPoints.last(); + qreal currentScaleFactor = + QLineF(touchPoint0.position(), touchPoint1.position()).length() + / QLineF(touchPoint0.pressPosition(), touchPoint1.pressPosition()).length(); + if (touchEvent->touchPointStates() & QEventPoint::Released) { + // if one of the fingers is released, remember the current scale + // factor so that adding another finger later will continue zooming + // by adding new scale factor to the existing remembered value. + totalScaleFactor *= currentScaleFactor; + currentScaleFactor = 1; + } + setTransform(QTransform::fromScale(totalScaleFactor * currentScaleFactor, + totalScaleFactor * currentScaleFactor)); + } + return true; + } + default: + break; + } + return QGraphicsView::viewportEvent(event); +} diff --git a/tests/manual/examples/widgets/touch/pinchzoom/graphicsview.h b/tests/manual/examples/widgets/touch/pinchzoom/graphicsview.h new file mode 100644 index 0000000000..e6a300f418 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/graphicsview.h @@ -0,0 +1,18 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#pragma once +#include <QGraphicsView> + +class GraphicsView : public QGraphicsView +{ + Q_OBJECT + +public: + GraphicsView(QGraphicsScene *scene = nullptr, QWidget *parent = nullptr); + + bool viewportEvent(QEvent *event) override; + +private: + qreal totalScaleFactor = 1; +}; diff --git a/tests/manual/examples/widgets/touch/pinchzoom/images/cheese.jpg b/tests/manual/examples/widgets/touch/pinchzoom/images/cheese.jpg Binary files differnew file mode 100644 index 0000000000..dea5795fd0 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/images/cheese.jpg diff --git a/tests/manual/examples/widgets/touch/pinchzoom/main.cpp b/tests/manual/examples/widgets/touch/pinchzoom/main.cpp new file mode 100644 index 0000000000..85b5cad1f8 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/main.cpp @@ -0,0 +1,47 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include "graphicsview.h" +#include "mouse.h" + +#include <QApplication> +#include <cmath> + +static constexpr int MouseCount = 7; + +//! [0] +int main(int argc, char **argv) +{ + QApplication app(argc, argv); +//! [0] + +//! [1] + QGraphicsScene scene; + scene.setSceneRect(-300, -300, 600, 600); +//! [1] //! [2] + scene.setItemIndexMethod(QGraphicsScene::NoIndex); +//! [2] + +//! [3] + for (int i = 0; i < MouseCount; ++i) { + Mouse *mouse = new Mouse; + mouse->setPos(::sin((i * 6.28) / MouseCount) * 200, + ::cos((i * 6.28) / MouseCount) * 200); + scene.addItem(mouse); + } +//! [3] + +//! [4] + GraphicsView view(&scene); + view.setRenderHint(QPainter::Antialiasing); + view.setBackgroundBrush(QPixmap(":/images/cheese.jpg")); +//! [4] //! [5] + view.setCacheMode(QGraphicsView::CacheBackground); + view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate); +//! [5] //! [6] + view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice")); + view.showMaximized(); + + return app.exec(); +} +//! [6] diff --git a/tests/manual/examples/widgets/touch/pinchzoom/mice.qrc b/tests/manual/examples/widgets/touch/pinchzoom/mice.qrc new file mode 100644 index 0000000000..accdb4d0a6 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/mice.qrc @@ -0,0 +1,5 @@ +<RCC> + <qresource prefix="/" > + <file>images/cheese.jpg</file> + </qresource> +</RCC> diff --git a/tests/manual/examples/widgets/touch/pinchzoom/mouse.cpp b/tests/manual/examples/widgets/touch/pinchzoom/mouse.cpp new file mode 100644 index 0000000000..ae0d497833 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/mouse.cpp @@ -0,0 +1,158 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include "mouse.h" + +#include <QGraphicsScene> +#include <QPainter> +#include <QRandomGenerator> +#include <QStyleOption> +#include <qmath.h> + +constexpr qreal Pi = M_PI; +constexpr qreal TwoPi = 2 * M_PI; + +static qreal normalizeAngle(qreal angle) +{ + while (angle < 0) + angle += TwoPi; + while (angle > TwoPi) + angle -= TwoPi; + return angle; +} + +//! [0] +Mouse::Mouse() : color(QRandomGenerator::global()->bounded(256), + QRandomGenerator::global()->bounded(256), + QRandomGenerator::global()->bounded(256)) +{ + setTransform(QTransform().rotate(QRandomGenerator::global()->bounded(360 * 16)), true); + startTimer(1000 / 33); +} +//! [0] + +//! [1] +QRectF Mouse::boundingRect() const +{ + qreal adjust = 0.5; + return QRectF(-18 - adjust, -22 - adjust, + 36 + adjust, 60 + adjust); +} +//! [1] + +//! [2] +QPainterPath Mouse::shape() const +{ + QPainterPath path; + path.addRect(-10, -20, 20, 40); + return path; +} +//! [2] + +//! [3] +void Mouse::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) +{ + // Body + painter->setBrush(color); + painter->drawEllipse(-10, -20, 20, 40); + + // Eyes + painter->setBrush(Qt::white); + painter->drawEllipse(-10, -17, 8, 8); + painter->drawEllipse(2, -17, 8, 8); + + // Nose + painter->setBrush(Qt::black); + painter->drawEllipse(QRectF(-2, -22, 4, 4)); + + // Pupils + painter->drawEllipse(QRectF(-8.0 + mouseEyeDirection, -17, 4, 4)); + painter->drawEllipse(QRectF(4.0 + mouseEyeDirection, -17, 4, 4)); + + // Ears + painter->setBrush(scene()->collidingItems(this).isEmpty() ? Qt::darkYellow : Qt::red); + painter->drawEllipse(-17, -12, 16, 16); + painter->drawEllipse(1, -12, 16, 16); + + // Tail + QPainterPath path(QPointF(0, 20)); + path.cubicTo(-5, 22, -5, 22, 0, 25); + path.cubicTo(5, 27, 5, 32, 0, 30); + path.cubicTo(-5, 32, -5, 42, 0, 35); + painter->setBrush(Qt::NoBrush); + painter->drawPath(path); +} +//! [3] + +//! [4] +void Mouse::timerEvent(QTimerEvent *) +{ +//! [4] + // Don't move too far away +//! [5] + QLineF lineToCenter(QPointF(0, 0), mapFromScene(0, 0)); + if (lineToCenter.length() > 150) { + qreal angleToCenter = std::atan2(lineToCenter.dy(), lineToCenter.dx()); + angleToCenter = normalizeAngle((Pi - angleToCenter) + Pi / 2); + + if (angleToCenter < Pi && angleToCenter > Pi / 4) { + // Rotate left + angle += (angle < -Pi / 2) ? 0.25 : -0.25; + } else if (angleToCenter >= Pi && angleToCenter < (Pi + Pi / 2 + Pi / 4)) { + // Rotate right + angle += (angle < Pi / 2) ? 0.25 : -0.25; + } + } else if (::sin(angle) < 0) { + angle += 0.25; + } else if (::sin(angle) > 0) { + angle -= 0.25; +//! [5] //! [6] + } +//! [6] + + // Try not to crash with any other mice +//! [7] + QList<QGraphicsItem *> dangerMice = scene()->items(QPolygonF() + << mapToScene(0, 0) + << mapToScene(-30, -50) + << mapToScene(30, -50)); + for (QGraphicsItem *item : dangerMice) { + if (item == this) + continue; + + QLineF lineToMouse(QPointF(0, 0), mapFromItem(item, 0, 0)); + qreal angleToMouse = std::atan2(lineToMouse.dy(), lineToMouse.dx()); + angleToMouse = normalizeAngle((Pi - angleToMouse) + Pi / 2); + + if (angleToMouse >= 0 && angleToMouse < Pi / 2) { + // Rotate right + angle += 0.5; + } else if (angleToMouse <= TwoPi && angleToMouse > (TwoPi - Pi / 2)) { + // Rotate left + angle -= 0.5; +//! [7] //! [8] + } +//! [8] //! [9] + } +//! [9] + + // Add some random movement +//! [10] + if (dangerMice.size() > 1 && QRandomGenerator::global()->bounded(10) == 0) { + if (QRandomGenerator::global()->bounded(1)) + angle += QRandomGenerator::global()->bounded(1 / 500.0); + else + angle -= QRandomGenerator::global()->bounded(1 / 500.0); + } +//! [10] + +//! [11] + speed += (-50 + QRandomGenerator::global()->bounded(100)) / 100.0; + + qreal dx = ::sin(angle) * 10; + mouseEyeDirection = (qAbs(dx / 5) < 1) ? 0 : dx / 5; + + setTransform(QTransform().rotate(dx), true); + setPos(mapToParent(0, -(3 + sin(speed) * 3))); +} +//! [11] diff --git a/tests/manual/examples/widgets/touch/pinchzoom/mouse.h b/tests/manual/examples/widgets/touch/pinchzoom/mouse.h new file mode 100644 index 0000000000..6b3ef98c22 --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/mouse.h @@ -0,0 +1,33 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#ifndef MOUSE_H +#define MOUSE_H + +#include <QGraphicsObject> + +//! [0] +class Mouse : public QGraphicsObject +{ + Q_OBJECT + +public: + Mouse(); + + QRectF boundingRect() const override; + QPainterPath shape() const override; + void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, + QWidget *widget) override; + +protected: + void timerEvent(QTimerEvent *event) override; + +private: + qreal angle = 0; + qreal speed = 0; + qreal mouseEyeDirection = 0; + QColor color; +}; +//! [0] + +#endif diff --git a/tests/manual/examples/widgets/touch/pinchzoom/pinchzoom.pro b/tests/manual/examples/widgets/touch/pinchzoom/pinchzoom.pro new file mode 100644 index 0000000000..ebbc7ddf1f --- /dev/null +++ b/tests/manual/examples/widgets/touch/pinchzoom/pinchzoom.pro @@ -0,0 +1,16 @@ +QT += widgets + +HEADERS += \ + mouse.h \ + graphicsview.h +SOURCES += \ + main.cpp \ + mouse.cpp \ + graphicsview.cpp + +RESOURCES += \ + mice.qrc + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/widgets/touch/pinchzoom +INSTALLS += target |
