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-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/CMakeLists.txt50
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/doc/images/pinch-zoom-example.pngbin0 -> 42493 bytes
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/doc/src/pinchzoom.qdoc14
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/graphicsview.cpp48
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/graphicsview.h18
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/images/cheese.jpgbin0 -> 3029 bytes
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/main.cpp47
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/mice.qrc5
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/mouse.cpp158
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/mouse.h33
-rw-r--r--tests/manual/examples/widgets/touch/pinchzoom/pinchzoom.pro16
11 files changed, 389 insertions, 0 deletions
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
new file mode 100644
index 0000000000..7db51fbf55
--- /dev/null
+++ b/tests/manual/examples/widgets/touch/pinchzoom/doc/images/pinch-zoom-example.png
Binary files differ
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
new file mode 100644
index 0000000000..dea5795fd0
--- /dev/null
+++ b/tests/manual/examples/widgets/touch/pinchzoom/images/cheese.jpg
Binary files differ
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
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-17 20:57:29 +0000