qt 6.5.1 original

tests/manual/qgraphicsitemgroup/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## qgraphicsitemgroup Binary:
+#####################################################################
+
+qt_internal_add_manual_test(qgraphicsitemgroup
+    GUI
+    SOURCES
+        customitem.cpp customitem.h
+        main.cpp
+        widget.cpp widget.h widget.ui
+    LIBRARIES
+        Qt::Gui
+        Qt::Widgets
+    ENABLE_AUTOGEN_TOOLS
+        uic
+)

tests/manual/qgraphicsitemgroup/customitem.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "customitem.h"
+
+#include <QPainter>
+#include <QStyle>
+#include <QStyleOption>
+
+QList<CustomGroup*> CustomScene::selectedCustomGroups() const
+{
+    QList<QGraphicsItem*> all = selectedItems();
+    QList<CustomGroup*> groups;
+
+    foreach (QGraphicsItem *item, all) {
+        CustomGroup* group = qgraphicsitem_cast<CustomGroup*>(item);
+        if (group)
+            groups.append(group);
+    }
+
+    return groups;
+}
+
+QList<CustomItem*> CustomScene::selectedCustomItems() const
+{
+    QList<QGraphicsItem*> all = selectedItems();
+    QList<CustomItem*> items;
+
+    foreach (QGraphicsItem *item, all) {
+        CustomItem* citem = qgraphicsitem_cast<CustomItem*>(item);
+        if (citem)
+            items.append(citem);
+    }
+
+    return items;
+}
+
+CustomGroup::CustomGroup() :
+    QGraphicsItemGroup()
+{
+    setFlag(QGraphicsItem::ItemIsMovable);
+    setFlag(QGraphicsItem::ItemIsSelectable);
+}
+
+void CustomGroup::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
+{
+    if (option->state & QStyle::State_Selected)
+        painter->setOpacity(1.);
+    else
+        painter->setOpacity(0.2);
+
+    painter->setPen(QPen(QColor(100, 100, 100), 2, Qt::DashLine));
+    painter->drawRect(boundingRect().adjusted(-2, -2, 2, 2));
+}
+
+QRectF CustomGroup::boundingRect() const
+{
+    return QGraphicsItemGroup::boundingRect().adjusted(-4, -4, 4 ,4);
+}
+
+CustomItem::CustomItem(qreal x, qreal y, qreal width, qreal height, const QBrush &brush) :
+    QGraphicsRectItem(x, y, width, height)
+{
+    setFlag(QGraphicsItem::ItemIsMovable);
+    setFlag(QGraphicsItem::ItemIsSelectable);
+    setBrush(brush);
+    setPen(Qt::NoPen);
+    setTransformOriginPoint(boundingRect().center());
+}

tests/manual/qgraphicsitemgroup/customitem.h

@@ -0,0 +1,39 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef CUSTOMITEM_H
+#define CUSTOMITEM_H
+
+#include <QGraphicsItem>
+#include <QBrush>
+#include <QGraphicsScene>
+
+class CustomGroup : public QGraphicsItemGroup
+{
+public:
+    CustomGroup();
+    virtual ~CustomGroup() { }
+
+protected:
+    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    virtual QRectF boundingRect() const;
+};
+
+class CustomItem : public QGraphicsRectItem
+{
+public:
+    CustomItem(qreal x, qreal y, qreal width, qreal height, const QBrush & brush = QBrush());
+    virtual ~CustomItem() { }
+};
+
+class CustomScene : public QGraphicsScene
+{
+    Q_OBJECT
+public:
+    CustomScene() : QGraphicsScene() { }
+
+    QList<CustomItem*> selectedCustomItems() const;
+    QList<CustomGroup*> selectedCustomGroups() const;
+};
+
+#endif // CUSTOMITEM_H

tests/manual/qgraphicsitemgroup/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QApplication>
+#include "widget.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    Widget w;
+    w.show();
+    return a.exec();
+}

tests/manual/qgraphicsitemgroup/qgraphicsitemgroup.pro

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+TARGET = qgraphicsitemgroup
+QT += widgets
+TEMPLATE = app
+SOURCES += main.cpp \
+    widget.cpp \
+    customitem.cpp
+HEADERS += widget.h \
+    customitem.h
+FORMS += widget.ui

tests/manual/qgraphicsitemgroup/widget.cpp

@@ -0,0 +1,222 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "widget.h"
+#include "ui_widget.h"
+#include <QGraphicsOpacityEffect>
+#include <QPropertyAnimation>
+
+Widget::Widget(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::Widget),
+    previousSelectionCount(0)
+{
+    ui->setupUi(this);
+
+    effect = new QGraphicsOpacityEffect;
+    effect->setOpacity(0.3);
+    ui->groupBox->setGraphicsEffect(effect);
+
+    fadeIn = new QPropertyAnimation(effect, "opacity");
+    fadeIn->setDuration(200);
+    fadeIn->setStartValue(0.3);
+    fadeIn->setEndValue(1.);
+
+    fadeOut = new QPropertyAnimation(effect, "opacity");
+    fadeOut->setDuration(200);
+    fadeOut->setStartValue(1.);
+    fadeOut->setEndValue(0.3);
+
+    scene = new CustomScene;
+    scene->setSceneRect(-250,-250,500,500);
+    ui->view->setScene(scene);
+    scene->setBackgroundBrush(Qt::white);
+    ui->view->setInteractive(true);
+    ui->view->setDragMode(QGraphicsView::RubberBandDrag);
+    ui->view->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+    ui->view->setRenderHints( QPainter::SmoothPixmapTransform |
+                              QPainter::TextAntialiasing |
+                              QPainter::Antialiasing );
+
+    rectBlue = new CustomItem(-100, -100, 50, 50, QColor(80, 80, 200));
+    scene->addItem(rectBlue);
+    rectGreen = new CustomItem(100, -100, 50, 50, QColor(80, 200, 80));
+    scene->addItem(rectGreen);
+    rectRed = new CustomItem(-100, 100, 50, 50, QColor(200, 80, 80));
+    scene->addItem(rectRed);
+    rectYellow = new CustomItem(100, 100, 50, 50, QColor(200, 200, 20));
+    scene->addItem(rectYellow);
+
+    connect(scene, SIGNAL(selectionChanged()), this, SLOT(onSceneSelectionChanged()));
+}
+
+Widget::~Widget()
+{
+    delete ui;
+    delete fadeIn;
+    delete fadeOut;
+}
+
+void Widget::on_rotate_valueChanged(int value)
+{
+    if (scene->selectedItems().count() != 1)
+        return;
+
+    QGraphicsItem *item = scene->selectedItems().at(0);
+    item->setRotation(value);
+    ui->rotateItem->setValue(checkedItem()->rotation());
+}
+
+void Widget::on_scale_valueChanged(int value)
+{
+    if (scene->selectedItems().count() != 1)
+        return;
+
+    QGraphicsItem *item = scene->selectedItems().at(0);
+    item->setScale(value / 10.);
+    ui->scaleItem->setValue(checkedItem()->scale() * 10);
+}
+
+void Widget::on_rotateItem_valueChanged(int value)
+{
+    if (!scene->selectedItems().empty() && scene->selectedItems().at(0) == checkedItem())
+        ui->rotate->setValue(value);
+    else
+        checkedItem()->setRotation(value);
+}
+
+void Widget::on_scaleItem_valueChanged(int value)
+{
+    if (!scene->selectedItems().empty() && scene->selectedItems().at(0) == checkedItem())
+        ui->scale->setValue(value);
+    else
+        checkedItem()->setScale(value / 10.);
+}
+
+void Widget::on_group_clicked()
+{
+    QList<QGraphicsItem*> all = scene->selectedItems();
+    if (all.size() < 2)
+        return;
+
+    QList<CustomItem*> items = scene->selectedCustomItems();
+    QList<CustomGroup*> groups = scene->selectedCustomGroups();
+
+    if (groups.size() == 1) {
+        foreach (CustomItem *item, items) {
+            item->setSelected(false);
+            groups[0]->addToGroup(item);
+        }
+
+        return;
+    }
+
+    CustomGroup* group = new CustomGroup;
+    scene->addItem(group);
+    foreach (QGraphicsItem *item, all) {
+        item->setSelected(false);
+        group->addToGroup(item);
+    }
+    group->setSelected(true);
+
+    updateUngroupButton();
+}
+
+void Widget::on_dismantle_clicked()
+{
+    QList<CustomGroup*> groups = scene->selectedCustomGroups();
+
+    foreach (CustomGroup *group, groups) {
+        foreach (QGraphicsItem *item, group->childItems())
+            group->removeFromGroup(item);
+
+        delete group;
+    }
+
+    updateUngroupButton();
+}
+
+void Widget::on_merge_clicked()
+{
+    QList<CustomGroup*> groups = scene->selectedCustomGroups();
+    if (groups.size() < 2)
+        return;
+
+    CustomGroup *newBigGroup = groups.takeFirst();
+    foreach (CustomGroup *group, groups) {
+        foreach (QGraphicsItem *item, group->childItems())
+            item->setGroup(newBigGroup);
+
+        delete group;
+    }
+}
+
+void Widget::onSceneSelectionChanged()
+{
+    QList<QGraphicsItem*> all = scene->selectedItems();
+    QList<CustomGroup*> groups = scene->selectedCustomGroups();
+
+    if (all.empty() && all.count() != previousSelectionCount) {
+        fadeOut->start();
+    } else if (previousSelectionCount == 0) {
+        fadeIn->start();
+    }
+
+    if (all.count() == 1) {
+        QGraphicsItem *item = all.at(0);
+        ui->rotate->setValue(item->rotation());
+        ui->scale->setValue(item->scale() * 10);
+    } else {
+        ui->rotate->setValue(ui->rotate->minimum());
+        ui->scale->setValue(ui->scale->minimum());
+    }
+
+    ui->rotate->setEnabled(all.size() == 1);
+    ui->scale->setEnabled(all.size() == 1);
+    ui->group->setEnabled(all.size() > 1);
+    ui->dismantle->setEnabled(!groups.empty());
+    ui->merge->setEnabled(groups.size() > 1);
+
+    previousSelectionCount = all.size();
+
+    updateUngroupButton();
+}
+
+void Widget::on_ungroup_clicked()
+{
+    QGraphicsItemGroup *oldGroup = checkedItem()->group();
+    checkedItem()->setGroup(0);
+    if (oldGroup && oldGroup->childItems().empty())
+        delete oldGroup;
+
+    updateUngroupButton();
+}
+
+void Widget::updateUngroupButton()
+{
+    ui->ungroup->setEnabled(checkedItem()->group() != 0);
+}
+
+CustomItem * Widget::checkedItem() const
+{
+    CustomItem *item = nullptr;
+
+    if (ui->blue->isChecked())
+        item = rectBlue;
+    else if (ui->red->isChecked())
+        item = rectRed;
+    else if (ui->green->isChecked())
+        item = rectGreen;
+    else if (ui->yellow->isChecked())
+        item = rectYellow;
+
+    return item;
+}
+
+void Widget::on_buttonGroup_buttonClicked()
+{
+    ui->rotateItem->setValue(checkedItem()->rotation());
+    ui->scaleItem->setValue(checkedItem()->scale() * 10);
+
+    updateUngroupButton();
+}

tests/manual/qgraphicsitemgroup/widget.h

@@ -0,0 +1,55 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include "customitem.h"
+
+#include <QWidget>
+#include <QGraphicsItemGroup>
+#include <QPainter>
+
+namespace Ui {
+    class Widget;
+}
+
+class QGraphicsOpacityEffect;
+class QPropertyAnimation;
+
+class Widget : public QWidget
+{
+    Q_OBJECT
+public:
+    Widget(QWidget *parent = nullptr);
+    ~Widget();
+
+protected Q_SLOTS:
+    void on_rotate_valueChanged(int value);
+    void on_scale_valueChanged(int value);
+    void on_rotateItem_valueChanged(int value);
+    void on_scaleItem_valueChanged(int value);
+    void on_group_clicked();
+    void on_dismantle_clicked();
+    void on_merge_clicked();
+    void onSceneSelectionChanged();
+    void on_ungroup_clicked();
+    void on_buttonGroup_buttonClicked();
+
+private:
+    void updateUngroupButton();
+    CustomItem * checkedItem() const;
+
+    Ui::Widget *ui;
+    CustomScene *scene;
+    CustomItem *rectBlue;
+    CustomItem *rectRed;
+    CustomItem *rectGreen;
+    CustomItem *rectYellow;
+    QGraphicsOpacityEffect* effect;
+    QPropertyAnimation *fadeIn;
+    QPropertyAnimation *fadeOut;
+    int previousSelectionCount;
+};
+
+#endif // WIDGET_H

tests/manual/qgraphicsitemgroup/widget.ui

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+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Widget</class>
+ <widget class="QWidget" name="Widget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>782</width>
+    <height>695</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Widget</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout_2">
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QGroupBox" name="groupBox_2">
+       <property name="title">
+        <string>Items</string>
+       </property>
+       <layout class="QVBoxLayout" name="verticalLayout_6">
+        <item>
+         <layout class="QHBoxLayout" name="horizontalLayout_3">
+          <item>
+           <layout class="QVBoxLayout" name="verticalLayout_4">
+            <item>
+             <widget class="QRadioButton" name="blue">
+              <property name="text">
+               <string>Blue</string>
+              </property>
+              <property name="checked">
+               <bool>true</bool>
+              </property>
+              <attribute name="buttonGroup">
+               <string>buttonGroup</string>
+              </attribute>
+             </widget>
+            </item>
+            <item>
+             <widget class="QRadioButton" name="red">
+              <property name="text">
+               <string>Red</string>
+              </property>
+              <attribute name="buttonGroup">
+               <string>buttonGroup</string>
+              </attribute>
+             </widget>
+            </item>
+            <item>
+             <widget class="QRadioButton" name="green">
+              <property name="text">
+               <string>Green</string>
+              </property>
+              <attribute name="buttonGroup">
+               <string>buttonGroup</string>
+              </attribute>
+             </widget>
+            </item>
+            <item>
+             <widget class="QRadioButton" name="yellow">
+              <property name="text">
+               <string>Yellow</string>
+              </property>
+              <attribute name="buttonGroup">
+               <string>buttonGroup</string>
+              </attribute>
+             </widget>
+            </item>
+           </layout>
+          </item>
+          <item>
+           <layout class="QVBoxLayout" name="verticalLayout_5">
+            <item>
+             <widget class="QLabel" name="label_3">
+              <property name="text">
+               <string>Rotate</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QSlider" name="rotateItem">
+              <property name="enabled">
+               <bool>true</bool>
+              </property>
+              <property name="minimumSize">
+               <size>
+                <width>120</width>
+                <height>0</height>
+               </size>
+              </property>
+              <property name="maximum">
+               <number>360</number>
+              </property>
+              <property name="orientation">
+               <enum>Qt::Horizontal</enum>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QLabel" name="label_4">
+              <property name="text">
+               <string>Scale</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QSlider" name="scaleItem">
+              <property name="enabled">
+               <bool>true</bool>
+              </property>
+              <property name="minimumSize">
+               <size>
+                <width>120</width>
+                <height>0</height>
+               </size>
+              </property>
+              <property name="minimum">
+               <number>5</number>
+              </property>
+              <property name="maximum">
+               <number>30</number>
+              </property>
+              <property name="value">
+               <number>10</number>
+              </property>
+              <property name="orientation">
+               <enum>Qt::Horizontal</enum>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </item>
+         </layout>
+        </item>
+        <item>
+         <widget class="QPushButton" name="ungroup">
+          <property name="enabled">
+           <bool>false</bool>
+          </property>
+          <property name="text">
+           <string>Ungroup</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeType">
+        <enum>QSizePolicy::Fixed</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>50</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QGroupBox" name="groupBox">
+       <property name="enabled">
+        <bool>true</bool>
+       </property>
+       <property name="minimumSize">
+        <size>
+         <width>300</width>
+         <height>164</height>
+        </size>
+       </property>
+       <property name="maximumSize">
+        <size>
+         <width>300</width>
+         <height>164</height>
+        </size>
+       </property>
+       <property name="title">
+        <string>Selection</string>
+       </property>
+       <layout class="QHBoxLayout" name="horizontalLayout_2">
+        <item>
+         <layout class="QVBoxLayout" name="verticalLayout">
+          <item>
+           <widget class="QLabel" name="label">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="text">
+             <string>Rotate</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QSlider" name="rotate">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="minimumSize">
+             <size>
+              <width>120</width>
+              <height>0</height>
+             </size>
+            </property>
+            <property name="maximum">
+             <number>360</number>
+            </property>
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QLabel" name="label_2">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="text">
+             <string>Scale</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QSlider" name="scale">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="minimumSize">
+             <size>
+              <width>120</width>
+              <height>0</height>
+             </size>
+            </property>
+            <property name="minimum">
+             <number>5</number>
+            </property>
+            <property name="maximum">
+             <number>30</number>
+            </property>
+            <property name="value">
+             <number>10</number>
+            </property>
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
+        <item>
+         <layout class="QVBoxLayout" name="verticalLayout_3">
+          <item>
+           <widget class="QPushButton" name="group">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="text">
+             <string>Group</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QPushButton" name="merge">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="text">
+             <string>Merge Groups</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QPushButton" name="dismantle">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="text">
+             <string>Dismantle Group</string>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
+       </layout>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer_2">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QGraphicsView" name="view"/>
+   </item>
+  </layout>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+ <buttongroups>
+  <buttongroup name="buttonGroup"/>
+ </buttongroups>
+</ui>