qt 6.5.1 original

examples/widgets/graphicsview/chip/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(chip LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/graphicsview/chip")
+
+find_package(Qt6
+    REQUIRED COMPONENTS Core Gui Widgets
+    OPTIONAL_COMPONENTS PrintSupport
+)
+
+qt_standard_project_setup()
+
+qt_add_executable(chip
+    chip.cpp chip.h
+    main.cpp
+    mainwindow.cpp mainwindow.h
+    view.cpp view.h
+)
+
+set_target_properties(chip PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(chip PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+# Resources:
+set(images_resource_files
+    "fileprint.png"
+    "qt4logo.png"
+    "rotateleft.png"
+    "rotateright.png"
+    "zoomin.png"
+    "zoomout.png"
+)
+
+qt_add_resources(chip "images"
+    PREFIX
+        "/"
+    FILES
+        ${images_resource_files}
+)
+
+if(TARGET Qt6::PrintSupport)
+    target_link_libraries(chip PRIVATE Qt6::PrintSupport)
+endif()
+
+install(TARGETS chip
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/graphicsview/chip/chip.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "chip.h"
+
+#include <QGraphicsSceneMouseEvent>
+#include <QPainter>
+#include <QStyleOptionGraphicsItem>
+
+Chip::Chip(const QColor &color, int x, int y)
+{
+    this->x = x;
+    this->y = y;
+    this->color = color;
+    setZValue((x + y) % 2);
+
+    setFlags(ItemIsSelectable | ItemIsMovable);
+    setAcceptHoverEvents(true);
+}
+
+QRectF Chip::boundingRect() const
+{
+    return QRectF(0, 0, 110, 70);
+}
+
+QPainterPath Chip::shape() const
+{
+    QPainterPath path;
+    path.addRect(14, 14, 82, 42);
+    return path;
+}
+
+void Chip::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(widget);
+
+    QColor fillColor = (option->state & QStyle::State_Selected) ? color.darker(150) : color;
+    if (option->state & QStyle::State_MouseOver)
+        fillColor = fillColor.lighter(125);
+
+    const qreal lod = option->levelOfDetailFromTransform(painter->worldTransform());
+    if (lod < 0.2) {
+        if (lod < 0.125) {
+            painter->fillRect(QRectF(0, 0, 110, 70), fillColor);
+            return;
+        }
+
+        QBrush b = painter->brush();
+        painter->setBrush(fillColor);
+        painter->drawRect(13, 13, 97, 57);
+        painter->setBrush(b);
+        return;
+    }
+
+    QPen oldPen = painter->pen();
+    QPen pen = oldPen;
+    int width = 0;
+    if (option->state & QStyle::State_Selected)
+        width += 2;
+
+    pen.setWidth(width);
+    QBrush b = painter->brush();
+    painter->setBrush(QBrush(fillColor.darker(option->state & QStyle::State_Sunken ? 120 : 100)));
+
+    painter->drawRect(QRect(14, 14, 79, 39));
+    painter->setBrush(b);
+
+    if (lod >= 1) {
+        painter->setPen(QPen(Qt::gray, 1));
+        painter->drawLine(15, 54, 94, 54);
+        painter->drawLine(94, 53, 94, 15);
+        painter->setPen(QPen(Qt::black, 0));
+    }
+
+    // Draw text
+    if (lod >= 2) {
+        QFont font("Times", 10);
+        font.setStyleStrategy(QFont::ForceOutline);
+        painter->setFont(font);
+        painter->save();
+        painter->scale(0.1, 0.1);
+        painter->drawText(170, 180, QString("Model: VSC-2000 (Very Small Chip) at %1x%2").arg(x).arg(y));
+        painter->drawText(170, 200, QString("Serial number: DLWR-WEER-123L-ZZ33-SDSJ"));
+        painter->drawText(170, 220, QString("Manufacturer: Chip Manufacturer"));
+        painter->restore();
+    }
+
+    // Draw lines
+    QVarLengthArray<QLineF, 36> lines;
+    if (lod >= 0.5) {
+        for (int i = 0; i <= 10; i += (lod > 0.5 ? 1 : 2)) {
+            lines.append(QLineF(18 + 7 * i, 13, 18 + 7 * i, 5));
+            lines.append(QLineF(18 + 7 * i, 54, 18 + 7 * i, 62));
+        }
+        for (int i = 0; i <= 6; i += (lod > 0.5 ? 1 : 2)) {
+            lines.append(QLineF(5, 18 + i * 5, 13, 18 + i * 5));
+            lines.append(QLineF(94, 18 + i * 5, 102, 18 + i * 5));
+        }
+    }
+    if (lod >= 0.4) {
+        const QLineF lineData[] = {
+            QLineF(25, 35, 35, 35),
+            QLineF(35, 30, 35, 40),
+            QLineF(35, 30, 45, 35),
+            QLineF(35, 40, 45, 35),
+            QLineF(45, 30, 45, 40),
+            QLineF(45, 35, 55, 35)
+        };
+        lines.append(lineData, 6);
+    }
+    painter->drawLines(lines.data(), lines.size());
+
+    // Draw red ink
+    if (stuff.size() > 1) {
+        QPen p = painter->pen();
+        painter->setPen(QPen(Qt::red, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
+        painter->setBrush(Qt::NoBrush);
+        QPainterPath path;
+        path.moveTo(stuff.first());
+        for (int i = 1; i < stuff.size(); ++i)
+            path.lineTo(stuff.at(i));
+        painter->drawPath(path);
+        painter->setPen(p);
+    }
+}
+
+void Chip::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    QGraphicsItem::mousePressEvent(event);
+    update();
+}
+
+void Chip::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->modifiers() & Qt::ShiftModifier) {
+        stuff << event->pos();
+        update();
+        return;
+    }
+    QGraphicsItem::mouseMoveEvent(event);
+}
+
+void Chip::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    QGraphicsItem::mouseReleaseEvent(event);
+    update();
+}

examples/widgets/graphicsview/chip/chip.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef CHIP_H
+#define CHIP_H
+
+#include <QColor>
+#include <QGraphicsItem>
+
+class Chip : public QGraphicsItem
+{
+public:
+    Chip(const QColor &color, int x, int y);
+
+    QRectF boundingRect() const override;
+    QPainterPath shape() const override;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget) override;
+
+protected:
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+
+private:
+    int x;
+    int y;
+    QColor color;
+    QList<QPointF> stuff;
+};
+
+#endif // CHIP_H

examples/widgets/graphicsview/chip/chip.pro

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+RESOURCES += images.qrc
+
+HEADERS += mainwindow.h view.h chip.h
+SOURCES += main.cpp
+SOURCES += mainwindow.cpp view.cpp chip.cpp
+
+QT += widgets
+qtHaveModule(printsupport): QT += printsupport
+
+build_all:!build_pass {
+    CONFIG -= build_all
+    CONFIG += release
+}
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/graphicsview/chip
+INSTALLS += target
+

examples/widgets/graphicsview/chip/images.qrc

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+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>qt4logo.png</file>
+    <file>zoomin.png</file>
+    <file>zoomout.png</file>
+    <file>rotateleft.png</file>
+    <file>rotateright.png</file>
+    <file>fileprint.png</file>
+</qresource>
+</RCC>

examples/widgets/graphicsview/chip/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "mainwindow.h"
+
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    Q_INIT_RESOURCE(images);
+
+    QApplication app(argc, argv);
+    app.setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
+
+    MainWindow window;
+    window.show();
+
+    return app.exec();
+}

examples/widgets/graphicsview/chip/mainwindow.cpp

@@ -0,0 +1,65 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "chip.h"
+#include "mainwindow.h"
+#include "view.h"
+
+#include <QHBoxLayout>
+#include <QSplitter>
+
+MainWindow::MainWindow(QWidget *parent)
+    : QWidget(parent), scene(new QGraphicsScene(this))
+    , h1Splitter(new QSplitter(this)), h2Splitter(new QSplitter(this))
+{
+    populateScene();
+
+    QSplitter *vSplitter = new QSplitter;
+    vSplitter->setOrientation(Qt::Vertical);
+    vSplitter->addWidget(h1Splitter);
+    vSplitter->addWidget(h2Splitter);
+
+    View *view = new View("Top left view");
+    view->view()->setScene(scene);
+    h1Splitter->addWidget(view);
+
+    view = new View("Top right view");
+    view->view()->setScene(scene);
+    h1Splitter->addWidget(view);
+
+    view = new View("Bottom left view");
+    view->view()->setScene(scene);
+    h2Splitter->addWidget(view);
+
+    view = new View("Bottom right view");
+    view->view()->setScene(scene);
+    h2Splitter->addWidget(view);
+
+    QHBoxLayout *layout = new QHBoxLayout;
+    layout->addWidget(vSplitter);
+    setLayout(layout);
+
+    setWindowTitle(tr("Chip Example"));
+}
+
+void MainWindow::populateScene()
+{
+    QImage image(":/qt4logo.png");
+
+    // Populate scene
+    int xx = 0;
+    for (int i = -11000; i < 11000; i += 110) {
+        ++xx;
+        int yy = 0;
+        for (int j = -7000; j < 7000; j += 70) {
+            ++yy;
+            qreal x = (i + 11000) / 22000.0;
+            qreal y = (j + 7000) / 14000.0;
+
+            QColor color(image.pixel(int(image.width() * x), int(image.height() * y)));
+            QGraphicsItem *item = new Chip(color, xx, yy);
+            item->setPos(QPointF(i, j));
+            scene->addItem(item);
+        }
+    }
+}

examples/widgets/graphicsview/chip/mainwindow.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QGraphicsScene;
+class QSplitter;
+QT_END_NAMESPACE
+
+class MainWindow : public QWidget
+{
+    Q_OBJECT
+public:
+    MainWindow(QWidget *parent = nullptr);
+
+private:
+    void setupMatrix();
+    void populateScene();
+
+    QGraphicsScene *scene;
+    QSplitter *h1Splitter;
+    QSplitter *h2Splitter;
+};
+
+#endif // MAINWINDOW_H

examples/widgets/graphicsview/chip/view.cpp

@@ -0,0 +1,237 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "view.h"
+
+#if defined(QT_PRINTSUPPORT_LIB)
+#include <QtPrintSupport/qtprintsupportglobal.h>
+#if QT_CONFIG(printdialog)
+#include <QPrinter>
+#include <QPrintDialog>
+#endif
+#endif
+#include <QtWidgets>
+#include <QtMath>
+
+#if QT_CONFIG(wheelevent)
+void GraphicsView::wheelEvent(QWheelEvent *e)
+{
+    if (e->modifiers() & Qt::ControlModifier) {
+        if (e->angleDelta().y() > 0)
+            view->zoomInBy(6);
+        else
+            view->zoomOutBy(6);
+        e->accept();
+    } else {
+        QGraphicsView::wheelEvent(e);
+    }
+}
+#endif
+
+View::View(const QString &name, QWidget *parent)
+    : QFrame(parent)
+{
+    setFrameStyle(Sunken | StyledPanel);
+    graphicsView = new GraphicsView(this);
+    graphicsView->setRenderHint(QPainter::Antialiasing, false);
+    graphicsView->setDragMode(QGraphicsView::RubberBandDrag);
+    graphicsView->setOptimizationFlags(QGraphicsView::DontSavePainterState);
+    graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
+    graphicsView->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
+
+    int size = style()->pixelMetric(QStyle::PM_ToolBarIconSize);
+    QSize iconSize(size, size);
+
+    QToolButton *zoomInIcon = new QToolButton;
+    zoomInIcon->setAutoRepeat(true);
+    zoomInIcon->setAutoRepeatInterval(33);
+    zoomInIcon->setAutoRepeatDelay(0);
+    zoomInIcon->setIcon(QPixmap(":/zoomin.png"));
+    zoomInIcon->setIconSize(iconSize);
+    QToolButton *zoomOutIcon = new QToolButton;
+    zoomOutIcon->setAutoRepeat(true);
+    zoomOutIcon->setAutoRepeatInterval(33);
+    zoomOutIcon->setAutoRepeatDelay(0);
+    zoomOutIcon->setIcon(QPixmap(":/zoomout.png"));
+    zoomOutIcon->setIconSize(iconSize);
+    zoomSlider = new QSlider;
+    zoomSlider->setMinimum(0);
+    zoomSlider->setMaximum(500);
+    zoomSlider->setValue(250);
+    zoomSlider->setTickPosition(QSlider::TicksRight);
+
+    // Zoom slider layout
+    QVBoxLayout *zoomSliderLayout = new QVBoxLayout;
+    zoomSliderLayout->addWidget(zoomInIcon);
+    zoomSliderLayout->addWidget(zoomSlider);
+    zoomSliderLayout->addWidget(zoomOutIcon);
+
+    QToolButton *rotateLeftIcon = new QToolButton;
+    rotateLeftIcon->setIcon(QPixmap(":/rotateleft.png"));
+    rotateLeftIcon->setIconSize(iconSize);
+    QToolButton *rotateRightIcon = new QToolButton;
+    rotateRightIcon->setIcon(QPixmap(":/rotateright.png"));
+    rotateRightIcon->setIconSize(iconSize);
+    rotateSlider = new QSlider;
+    rotateSlider->setOrientation(Qt::Horizontal);
+    rotateSlider->setMinimum(-360);
+    rotateSlider->setMaximum(360);
+    rotateSlider->setValue(0);
+    rotateSlider->setTickPosition(QSlider::TicksBelow);
+
+    // Rotate slider layout
+    QHBoxLayout *rotateSliderLayout = new QHBoxLayout;
+    rotateSliderLayout->addWidget(rotateLeftIcon);
+    rotateSliderLayout->addWidget(rotateSlider);
+    rotateSliderLayout->addWidget(rotateRightIcon);
+
+    resetButton = new QToolButton;
+    resetButton->setText(tr("0"));
+    resetButton->setEnabled(false);
+
+    // Label layout
+    QHBoxLayout *labelLayout = new QHBoxLayout;
+    label = new QLabel(name);
+    label2 = new QLabel(tr("Pointer Mode"));
+    selectModeButton = new QToolButton;
+    selectModeButton->setText(tr("Select"));
+    selectModeButton->setCheckable(true);
+    selectModeButton->setChecked(true);
+    dragModeButton = new QToolButton;
+    dragModeButton->setText(tr("Drag"));
+    dragModeButton->setCheckable(true);
+    dragModeButton->setChecked(false);
+    antialiasButton = new QToolButton;
+    antialiasButton->setText(tr("Antialiasing"));
+    antialiasButton->setCheckable(true);
+    antialiasButton->setChecked(false);
+    printButton = new QToolButton;
+    printButton->setIcon(QIcon(QPixmap(":/fileprint.png")));
+
+    QButtonGroup *pointerModeGroup = new QButtonGroup(this);
+    pointerModeGroup->setExclusive(true);
+    pointerModeGroup->addButton(selectModeButton);
+    pointerModeGroup->addButton(dragModeButton);
+
+    labelLayout->addWidget(label);
+    labelLayout->addStretch();
+    labelLayout->addWidget(label2);
+    labelLayout->addWidget(selectModeButton);
+    labelLayout->addWidget(dragModeButton);
+    labelLayout->addStretch();
+    labelLayout->addWidget(antialiasButton);
+    labelLayout->addWidget(printButton);
+
+    QGridLayout *topLayout = new QGridLayout;
+    topLayout->addLayout(labelLayout, 0, 0);
+    topLayout->addWidget(graphicsView, 1, 0);
+    topLayout->addLayout(zoomSliderLayout, 1, 1);
+    topLayout->addLayout(rotateSliderLayout, 2, 0);
+    topLayout->addWidget(resetButton, 2, 1);
+    setLayout(topLayout);
+
+    connect(resetButton, &QAbstractButton::clicked, this, &View::resetView);
+    connect(zoomSlider, &QAbstractSlider::valueChanged, this, &View::setupMatrix);
+    connect(rotateSlider, &QAbstractSlider::valueChanged, this, &View::setupMatrix);
+    connect(graphicsView->verticalScrollBar(), &QAbstractSlider::valueChanged,
+            this, &View::setResetButtonEnabled);
+    connect(graphicsView->horizontalScrollBar(), &QAbstractSlider::valueChanged,
+            this, &View::setResetButtonEnabled);
+    connect(selectModeButton, &QAbstractButton::toggled, this, &View::togglePointerMode);
+    connect(dragModeButton, &QAbstractButton::toggled, this, &View::togglePointerMode);
+    connect(antialiasButton, &QAbstractButton::toggled, this, &View::toggleAntialiasing);
+    connect(rotateLeftIcon, &QAbstractButton::clicked, this, &View::rotateLeft);
+    connect(rotateRightIcon, &QAbstractButton::clicked, this, &View::rotateRight);
+    connect(zoomInIcon, &QAbstractButton::clicked, this, &View::zoomIn);
+    connect(zoomOutIcon, &QAbstractButton::clicked, this, &View::zoomOut);
+    connect(printButton, &QAbstractButton::clicked, this, &View::print);
+
+    setupMatrix();
+}
+
+QGraphicsView *View::view() const
+{
+    return static_cast<QGraphicsView *>(graphicsView);
+}
+
+void View::resetView()
+{
+    zoomSlider->setValue(250);
+    rotateSlider->setValue(0);
+    setupMatrix();
+    graphicsView->ensureVisible(QRectF(0, 0, 0, 0));
+
+    resetButton->setEnabled(false);
+}
+
+void View::setResetButtonEnabled()
+{
+    resetButton->setEnabled(true);
+}
+
+void View::setupMatrix()
+{
+    qreal scale = qPow(qreal(2), (zoomSlider->value() - 250) / qreal(50));
+
+    QTransform matrix;
+    matrix.scale(scale, scale);
+    matrix.rotate(rotateSlider->value());
+
+    graphicsView->setTransform(matrix);
+    setResetButtonEnabled();
+}
+
+void View::togglePointerMode()
+{
+    graphicsView->setDragMode(selectModeButton->isChecked()
+                              ? QGraphicsView::RubberBandDrag
+                              : QGraphicsView::ScrollHandDrag);
+    graphicsView->setInteractive(selectModeButton->isChecked());
+}
+
+void View::toggleAntialiasing()
+{
+    graphicsView->setRenderHint(QPainter::Antialiasing, antialiasButton->isChecked());
+}
+
+void View::print()
+{
+#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog)
+    QPrinter printer;
+    QPrintDialog dialog(&printer, this);
+    if (dialog.exec() == QDialog::Accepted) {
+        QPainter painter(&printer);
+        graphicsView->render(&painter);
+    }
+#endif
+}
+
+void View::zoomIn()
+{
+    zoomSlider->setValue(zoomSlider->value() + 1);
+}
+
+void View::zoomOut()
+{
+    zoomSlider->setValue(zoomSlider->value() - 1);
+}
+
+void View::zoomInBy(int level)
+{
+    zoomSlider->setValue(zoomSlider->value() + level);
+}
+
+void View::zoomOutBy(int level)
+{
+    zoomSlider->setValue(zoomSlider->value() - level);
+}
+
+void View::rotateLeft()
+{
+    rotateSlider->setValue(rotateSlider->value() - 10);
+}
+
+void View::rotateRight()
+{
+    rotateSlider->setValue(rotateSlider->value() + 10);
+}

examples/widgets/graphicsview/chip/view.h

@@ -0,0 +1,70 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef VIEW_H
+#define VIEW_H
+
+#include <QFrame>
+#include <QGraphicsView>
+
+QT_BEGIN_NAMESPACE
+class QLabel;
+class QSlider;
+class QToolButton;
+QT_END_NAMESPACE
+
+class View;
+
+class GraphicsView : public QGraphicsView
+{
+    Q_OBJECT
+public:
+    GraphicsView(View *v) : QGraphicsView(), view(v) { }
+
+protected:
+#if QT_CONFIG(wheelevent)
+    void wheelEvent(QWheelEvent *) override;
+#endif
+
+private:
+    View *view;
+};
+
+class View : public QFrame
+{
+    Q_OBJECT
+public:
+    explicit View(const QString &name, QWidget *parent = nullptr);
+
+    QGraphicsView *view() const;
+
+public slots:
+    void zoomIn();
+    void zoomOut();
+    void zoomInBy(int level);
+    void zoomOutBy(int level);
+
+private slots:
+    void resetView();
+    void setResetButtonEnabled();
+    void setupMatrix();
+    void togglePointerMode();
+    void toggleAntialiasing();
+    void print();
+    void rotateLeft();
+    void rotateRight();
+
+private:
+    GraphicsView *graphicsView;
+    QLabel *label;
+    QLabel *label2;
+    QToolButton *selectModeButton;
+    QToolButton *dragModeButton;
+    QToolButton *antialiasButton;
+    QToolButton *printButton;
+    QToolButton *resetButton;
+    QSlider *zoomSlider;
+    QSlider *rotateSlider;
+};
+
+#endif // VIEW_H