qt 6.5.1 original

examples/widgets/graphicsview/basicgraphicslayouts/CMakeLists.txt

@@ -0,0 +1,50 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(basicgraphicslayouts LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/graphicsview/basicgraphicslayouts")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(basicgraphicslayouts
+    layoutitem.cpp layoutitem.h
+    main.cpp
+    window.cpp window.h
+)
+
+set_target_properties(basicgraphicslayouts PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(basicgraphicslayouts PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+# Resources:
+set(basicgraphicslayouts_resource_files
+    "images/block.png"
+)
+
+qt_add_resources(basicgraphicslayouts "basicgraphicslayouts"
+    PREFIX
+        "/"
+    FILES
+        ${basicgraphicslayouts_resource_files}
+)
+
+install(TARGETS basicgraphicslayouts
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/graphicsview/basicgraphicslayouts/basicgraphicslayouts.pro

@@ -0,0 +1,12 @@
+QT += widgets
+
+HEADERS   = layoutitem.h \
+            window.h
+SOURCES   = layoutitem.cpp \
+            main.cpp \
+            window.cpp
+RESOURCES = basicgraphicslayouts.qrc
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/graphicsview/basicgraphicslayouts
+INSTALLS += target

examples/widgets/graphicsview/basicgraphicslayouts/basicgraphicslayouts.qrc

@@ -0,0 +1,5 @@
+<RCC>
+ <qresource>
+  <file>images/block.png</file>
+ </qresource>
+</RCC>

examples/widgets/graphicsview/basicgraphicslayouts/layoutitem.cpp

@@ -0,0 +1,90 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "layoutitem.h"
+
+#include <QGradient>
+#include <QPainter>
+
+//! [0]
+LayoutItem::LayoutItem(QGraphicsItem *parent)
+    : QGraphicsLayoutItem(), QGraphicsItem(parent),
+      m_pix(QPixmap(QLatin1String(":/images/block.png")))
+{
+    setGraphicsItem(this);
+}
+//! [0]
+
+//! [1]
+void LayoutItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+                       QWidget *widget)
+{
+    Q_UNUSED(widget);
+    Q_UNUSED(option);
+
+    QRectF frame(QPointF(0, 0), geometry().size());
+    const QSize pmSize = m_pix.size();
+    QGradientStops stops;
+//! [1]
+
+//! [2]
+    // paint a background rect (with gradient)
+    QLinearGradient gradient(frame.topLeft(), frame.topLeft() + QPointF(200,200));
+    stops << QGradientStop(0.0, QColor(60, 60,  60));
+    stops << QGradientStop(frame.height() / 2 / frame.height(), QColor(102, 176, 54));
+
+    //stops << QGradientStop(((frame.height() + h)/2 )/frame.height(), QColor(157, 195,  55));
+    stops << QGradientStop(1.0, QColor(215, 215, 215));
+    gradient.setStops(stops);
+    painter->setBrush(QBrush(gradient));
+    painter->drawRoundedRect(frame, 10.0, 10.0);
+
+    // paint a rect around the pixmap (with gradient)
+    QPointF pixpos = frame.center() - (QPointF(pmSize.width(), pmSize.height()) / 2);
+    QRectF innerFrame(pixpos, pmSize);
+    innerFrame.adjust(-4, -4, 4, 4);
+    gradient.setStart(innerFrame.topLeft());
+    gradient.setFinalStop(innerFrame.bottomRight());
+    stops.clear();
+    stops << QGradientStop(0.0, QColor(215, 255, 200));
+    stops << QGradientStop(0.5, QColor(102, 176, 54));
+    stops << QGradientStop(1.0, QColor(0, 0,  0));
+    gradient.setStops(stops);
+    painter->setBrush(QBrush(gradient));
+    painter->drawRoundedRect(innerFrame, 10.0, 10.0);
+    painter->drawPixmap(pixpos, m_pix);
+}
+//! [2]
+
+//! [3]
+QRectF LayoutItem::boundingRect() const
+{
+    return QRectF(QPointF(0, 0), geometry().size());
+}
+//! [3]
+
+//! [4]
+void LayoutItem::setGeometry(const QRectF &geom)
+{
+    prepareGeometryChange();
+    QGraphicsLayoutItem::setGeometry(geom);
+    setPos(geom.topLeft());
+}
+//! [4]
+
+//! [5]
+QSizeF LayoutItem::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
+{
+    switch (which) {
+    case Qt::MinimumSize:
+    case Qt::PreferredSize:
+        // Do not allow a size smaller than the pixmap with two frames around it.
+        return m_pix.size() + QSize(12, 12);
+    case Qt::MaximumSize:
+        return QSizeF(1000,1000);
+    default:
+        break;
+    }
+    return constraint;
+}
+//! [5]

examples/widgets/graphicsview/basicgraphicslayouts/layoutitem.h

@@ -0,0 +1,30 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef LAYOUTITEM_H
+#define LAYOUTITEM_H
+
+#include <QGraphicsLayoutItem>
+#include <QGraphicsItem>
+#include <QPixmap>
+
+//! [0]
+class LayoutItem : public QGraphicsLayoutItem, public QGraphicsItem
+{
+public:
+    LayoutItem(QGraphicsItem *parent = nullptr);
+
+    // Inherited from QGraphicsLayoutItem
+    void setGeometry(const QRectF &geom) override;
+    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const override;
+
+    // Inherited from QGraphicsItem
+    QRectF boundingRect() const override;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr) override;
+
+private:
+    QPixmap m_pix;
+};
+//! [0]
+
+#endif // LAYOUTITEM_H

examples/widgets/graphicsview/basicgraphicslayouts/main.cpp

@@ -0,0 +1,22 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "window.h"
+
+#include <QApplication>
+#include <QGraphicsView>
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    QGraphicsScene scene;
+
+    Window *window = new Window;
+    scene.addItem(window);
+    QGraphicsView view(&scene);
+    view.resize(600, 600);
+    view.show();
+
+    return app.exec();
+}

examples/widgets/graphicsview/basicgraphicslayouts/window.cpp

@@ -0,0 +1,53 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "window.h"
+#include "layoutitem.h"
+
+#include <QGraphicsLinearLayout>
+#include <QGraphicsGridLayout>
+
+Window::Window(QGraphicsWidget *parent) : QGraphicsWidget(parent, Qt::Window)
+{
+//! [0]
+    QGraphicsLinearLayout *windowLayout = new QGraphicsLinearLayout(Qt::Vertical);
+    QGraphicsLinearLayout *linear = new QGraphicsLinearLayout(windowLayout);
+    LayoutItem *item = new LayoutItem;
+    linear->addItem(item);
+    linear->setStretchFactor(item, 1);
+//! [0]
+
+//! [1]
+    item = new LayoutItem;
+    linear->addItem(item);
+    linear->setStretchFactor(item, 3);
+    windowLayout->addItem(linear);
+//! [1]
+
+//! [2]
+    QGraphicsGridLayout *grid = new QGraphicsGridLayout(windowLayout);
+    item = new LayoutItem;
+    grid->addItem(item, 0, 0, 4, 1);
+    item = new LayoutItem;
+    item->setMaximumHeight(item->minimumHeight());
+    grid->addItem(item, 0, 1, 2, 1, Qt::AlignVCenter);
+    item = new LayoutItem;
+    item->setMaximumHeight(item->minimumHeight());
+    grid->addItem(item, 2, 1, 2, 1, Qt::AlignVCenter);
+    item = new LayoutItem;
+    grid->addItem(item, 0, 2);
+    item = new LayoutItem;
+    grid->addItem(item, 1, 2);
+    item = new LayoutItem;
+    grid->addItem(item, 2, 2);
+    item = new LayoutItem;
+    grid->addItem(item, 3, 2);
+    windowLayout->addItem(grid);
+//! [2]
+
+//! [3]
+    setLayout(windowLayout);
+    setWindowTitle(tr("Basic Graphics Layouts Example"));
+//! [3]
+
+}

examples/widgets/graphicsview/basicgraphicslayouts/window.h

@@ -0,0 +1,20 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <QGraphicsWidget>
+
+//! [0]
+class Window : public QGraphicsWidget
+{
+    Q_OBJECT
+public:
+    Window(QGraphicsWidget *parent = nullptr);
+
+};
+//! [0]
+
+#endif  //WINDOW_H
+