qt 6.5.1 original

examples/widgets/effects/CMakeLists.txt

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+qt_internal_add_example(blurpicker)
+qt_internal_add_example(fademessage)

examples/widgets/effects/blurpicker/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(blurpicker LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/effects/blurpicker")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(blurpicker
+    blureffect.cpp blureffect.h
+    blurpicker.cpp blurpicker.h
+    main.cpp
+)
+
+set_target_properties(blurpicker PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(blurpicker PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+# Resources:
+set(blurpicker_resource_files
+    "images/accessories-calculator.png"
+    "images/accessories-text-editor.png"
+    "images/background.jpg"
+    "images/help-browser.png"
+    "images/internet-group-chat.png"
+    "images/internet-mail.png"
+    "images/internet-web-browser.png"
+    "images/office-calendar.png"
+    "images/system-users.png"
+)
+
+qt_add_resources(blurpicker "blurpicker"
+    PREFIX
+        "/"
+    FILES
+        ${blurpicker_resource_files}
+)
+
+install(TARGETS blurpicker
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/effects/blurpicker/blureffect.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "blureffect.h"
+
+#include <QDebug>
+
+BlurEffect::BlurEffect(QGraphicsItem *item)
+    : QGraphicsBlurEffect()
+    , m_baseLine(200), item(item)
+{
+}
+
+void BlurEffect::adjustForItem()
+{
+    qreal y = m_baseLine - item->pos().y();
+    qreal radius = qBound(qreal(0.0), y / 32, qreal(16.0));
+    setBlurRadius(radius);
+}
+
+QRectF BlurEffect::boundingRect() const
+{
+    const_cast<BlurEffect *>(this)->adjustForItem();
+    return QGraphicsBlurEffect::boundingRect();
+}
+
+void BlurEffect::draw(QPainter *painter)
+{
+    adjustForItem();
+    QGraphicsBlurEffect::draw(painter);
+}

examples/widgets/effects/blurpicker/blureffect.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef BLUREFFECT_H
+#define BLUREFFECT_H
+
+#include <QGraphicsEffect>
+#include <QGraphicsItem>
+
+class BlurEffect: public QGraphicsBlurEffect
+{
+public:
+    BlurEffect(QGraphicsItem *item);
+
+    void setBaseLine(qreal y) { m_baseLine = y; }
+
+    QRectF boundingRect() const;
+
+    void draw(QPainter *painter) override;
+
+private:
+    void adjustForItem();
+
+private:
+    qreal m_baseLine;
+    QGraphicsItem *item;
+};
+
+#endif // BLUREFFECT_H

examples/widgets/effects/blurpicker/blurpicker.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "blurpicker.h"
+
+#include <QtWidgets>
+#include <QtCore/qmath.h>
+#include <qmath.h>
+#include "blureffect.h"
+
+BlurPicker::BlurPicker(QWidget *parent): QGraphicsView(parent), m_index(0.0), m_animation(this, "index")
+{
+    setBackgroundBrush(QPixmap(":/images/background.jpg"));
+    setScene(new QGraphicsScene(this));
+
+    setupScene();
+    setIndex(0);
+
+    m_animation.setDuration(400);
+    m_animation.setEasingCurve(QEasingCurve::InOutSine);
+
+    setRenderHint(QPainter::Antialiasing, true);
+    setFrameStyle(QFrame::NoFrame);
+}
+
+qreal BlurPicker::index() const
+{
+    return m_index;
+}
+
+void BlurPicker::setIndex(qreal index)
+{
+    m_index = index;
+
+    qreal baseline = 0;
+    const qreal iconAngle = 2 * M_PI / m_icons.count();
+    for (int i = 0; i < m_icons.count(); ++i) {
+        QGraphicsItem *icon = m_icons[i];
+        qreal a = (i + m_index) * iconAngle;
+        qreal xs = 170 * qSin(a);
+        qreal ys = 100 * qCos(a);
+        QPointF pos(xs, ys);
+        pos = QTransform().rotate(-20).map(pos);
+        pos -= QPointF(40, 40);
+        icon->setPos(pos);
+        baseline = qMax(baseline, ys);
+        static_cast<BlurEffect *>(icon->graphicsEffect())->setBaseLine(baseline);
+    }
+
+    scene()->update();
+}
+
+void BlurPicker::setupScene()
+{
+    scene()->setSceneRect(-200, -120, 400, 240);
+
+    QStringList names;
+    names << ":/images/accessories-calculator.png";
+    names << ":/images/accessories-text-editor.png";
+    names << ":/images/help-browser.png";
+    names << ":/images/internet-group-chat.png";
+    names << ":/images/internet-mail.png";
+    names << ":/images/internet-web-browser.png";
+    names << ":/images/office-calendar.png";
+    names << ":/images/system-users.png";
+
+    for (int i = 0; i < names.count(); i++) {
+        QPixmap pixmap(names[i]);
+        QGraphicsPixmapItem *icon = scene()->addPixmap(pixmap);
+        icon->setZValue(1);
+        icon->setGraphicsEffect(new BlurEffect(icon));
+        m_icons << icon;
+    }
+
+    QGraphicsPixmapItem *bg = scene()->addPixmap(QPixmap(":/images/background.jpg"));
+    bg->setZValue(0);
+    bg->setPos(-200, -150);
+}
+
+void BlurPicker::keyPressEvent(QKeyEvent *event)
+{
+    int delta = 0;
+    switch (event->key())
+    {
+    case Qt::Key_Left:
+        delta = -1;
+        break;
+    case  Qt::Key_Right:
+        delta = 1;
+        break;
+    default:
+        break;
+    }
+    if (m_animation.state() == QAbstractAnimation::Stopped && delta) {
+        m_animation.setEndValue(m_index + delta);
+        m_animation.start();
+        event->accept();
+    }
+}
+
+void BlurPicker::resizeEvent(QResizeEvent * /* event */)
+{
+}
+
+void BlurPicker::mousePressEvent(QMouseEvent *event)
+{
+    int delta = 0;
+    if (event->position().x() > (width() / 2))
+    {
+        delta = 1;
+    }
+    else
+    {
+        delta = -1;
+    }
+
+    if (m_animation.state() == QAbstractAnimation::Stopped && delta) {
+        m_animation.setEndValue(m_index + delta);
+        m_animation.start();
+        event->accept();
+    }
+}

examples/widgets/effects/blurpicker/blurpicker.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef BLURPICKER_H
+#define BLURPICKER_H
+
+#include <QGraphicsEffect>
+#include <QGraphicsView>
+#include <QPropertyAnimation>
+
+#include "blureffect.h"
+
+class BlurPicker: public QGraphicsView
+{
+    Q_OBJECT
+    Q_PROPERTY(qreal index READ index WRITE setIndex)
+
+public:
+    BlurPicker(QWidget *parent = nullptr);
+
+    qreal index() const;
+    void setIndex(qreal);
+
+protected:
+    void keyPressEvent(QKeyEvent *event) override;
+    void resizeEvent(QResizeEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
+
+private:
+    void setupScene();
+
+private:
+    qreal m_index;
+    QList<QGraphicsItem*> m_icons;
+    QPropertyAnimation m_animation;
+};
+
+#endif // BLURPICKER_H

examples/widgets/effects/blurpicker/blurpicker.pro

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+QT += widgets
+
+SOURCES += main.cpp blurpicker.cpp blureffect.cpp
+HEADERS += blurpicker.h blureffect.h
+RESOURCES += blurpicker.qrc
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/effects/blurpicker
+INSTALLS += target

examples/widgets/effects/blurpicker/blurpicker.qrc

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+<RCC>
+    <qresource prefix="/" >
+        <file>images/background.jpg</file>
+        <file>images/accessories-calculator.png</file>
+        <file>images/accessories-text-editor.png</file>
+        <file>images/help-browser.png</file>
+        <file>images/internet-group-chat.png</file>
+        <file>images/internet-mail.png</file>
+        <file>images/internet-web-browser.png</file>
+        <file>images/office-calendar.png</file>
+        <file>images/system-users.png</file>
+    </qresource>
+</RCC>
+

examples/widgets/effects/blurpicker/images/README.txt

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+The background is taken from a public domain photo at:
+http://www.photos8.com/view/computer_board2-800x600.html
+
+All other icons are from the Tango Desktop project:
+http://tango.freedesktop.org/Tango_Desktop_Project

examples/widgets/effects/blurpicker/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "blurpicker.h"
+#include <QApplication>
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    BlurPicker blurPicker;
+    blurPicker.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Application Picker"));
+
+    blurPicker.setFixedSize(400, 300);
+    blurPicker.show();
+
+    return app.exec();
+}

examples/widgets/effects/effects.pro

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+TEMPLATE      = \
+              subdirs
+SUBDIRS       = \
+              blurpicker \
+              fademessage

examples/widgets/effects/fademessage/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(fademessage LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/effects/fademessage")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(fademessage
+    fademessage.cpp fademessage.h
+    main.cpp
+)
+
+set_target_properties(fademessage PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(fademessage PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+# Resources:
+set(fademessage_resource_files
+    "background.jpg"
+)
+
+qt_add_resources(fademessage "fademessage"
+    PREFIX
+        "/"
+    FILES
+        ${fademessage_resource_files}
+)
+
+install(TARGETS fademessage
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/effects/fademessage/README

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+The background is taken from a public domain photo at:
+http://www.photos8.com/view/windows_problem_blue-800x600.html

examples/widgets/effects/fademessage/fademessage.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "fademessage.h"
+
+#include <QtWidgets>
+
+FadeMessage::FadeMessage(QWidget *parent): QGraphicsView(parent)
+{
+    setScene(&m_scene);
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+    setupScene();
+
+    m_animation = new QPropertyAnimation(m_effect, "strength", this);
+    m_animation->setDuration(500);
+    m_animation->setEasingCurve(QEasingCurve::InOutSine);
+    m_animation->setStartValue(0);
+    m_animation->setEndValue(1);
+
+    setRenderHint(QPainter::Antialiasing, true);
+    setFrameStyle(QFrame::NoFrame);
+}
+
+void FadeMessage::togglePopup()
+{
+    if (m_message->isVisible()) {
+        m_message->setVisible(false);
+        m_animation->setDirection(QAbstractAnimation::Backward);
+    } else {
+        m_message->setVisible(true);
+        m_animation->setDirection(QAbstractAnimation::Forward);
+    }
+    m_animation->start();
+}
+
+void FadeMessage::setupScene()
+{
+    QGraphicsRectItem *parent = m_scene.addRect(0, 0, 800, 600);
+    parent->setPen(Qt::NoPen);
+    parent->setZValue(0);
+
+    QGraphicsPixmapItem *bg = m_scene.addPixmap(QPixmap(":/background.jpg"));
+    bg->setParentItem(parent);
+    bg->setZValue(-1);
+
+    for (int i = 1; i < 5; ++i)
+        for (int j = 2; j < 5; ++j) {
+            QGraphicsRectItem *item = m_scene.addRect(i * 50, (j - 1) * 50, 38, 38);
+            item->setParentItem(parent);
+            item->setZValue(1);
+            int hue = 12 * (i * 5 + j);
+            item->setBrush(QColor::fromHsv(hue, 128, 128));
+        }
+
+    QFont font;
+    font.setPointSize(font.pointSize() * 2);
+    font.setBold(true);
+    QFontMetrics fontMetrics(font);
+    int fh = fontMetrics.height();
+
+    QString sceneText = "Qt Everywhere!";
+    int sceneTextWidth = fontMetrics.horizontalAdvance(sceneText);
+
+    QGraphicsRectItem *block = m_scene.addRect(50, 300, sceneTextWidth, fh + 3);
+    block->setPen(Qt::NoPen);
+    block->setBrush(QColor(102, 153, 51));
+
+    QGraphicsTextItem *text = m_scene.addText(sceneText, font);
+    text->setDefaultTextColor(Qt::white);
+    text->setPos(50, 300);
+    block->setZValue(2);
+    block->hide();
+
+    text->setParentItem(block);
+    m_message = block;
+
+    m_effect = new QGraphicsColorizeEffect;
+    m_effect->setColor(QColor(122, 193, 66));
+    m_effect->setStrength(0);
+    m_effect->setEnabled(true);
+    parent->setGraphicsEffect(m_effect);
+
+    QPushButton *press = new QPushButton;
+    press->setText(tr("Press me"));
+    connect(press, &QAbstractButton::clicked, this, &FadeMessage::togglePopup);
+    m_scene.addWidget(press);
+
+    press->move(300, 500);
+}

examples/widgets/effects/fademessage/fademessage.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef FADEMESSAGE_H
+#define FADEMESSAGE_H
+
+#include <QGraphicsEffect>
+#include <QGraphicsView>
+#include <QPropertyAnimation>
+
+#include "fademessage.h"
+
+class FadeMessage: public QGraphicsView
+{
+    Q_OBJECT
+
+public:
+    FadeMessage(QWidget *parent = nullptr);
+
+private:
+    void setupScene();
+
+private slots:
+    void togglePopup();
+
+private:
+    QGraphicsScene m_scene;
+    QGraphicsColorizeEffect *m_effect;
+    QGraphicsItem *m_message;
+    QPropertyAnimation *m_animation;
+};
+
+#endif // FADEMESSAGE_H

examples/widgets/effects/fademessage/fademessage.pro

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+QT += widgets
+
+SOURCES += main.cpp fademessage.cpp
+HEADERS += fademessage.h
+RESOURCES += fademessage.qrc
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/effects/fademessage
+INSTALLS += target

examples/widgets/effects/fademessage/fademessage.qrc

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+<RCC>
+    <qresource prefix="/" >
+        <file>background.jpg</file>
+    </qresource>
+</RCC>

examples/widgets/effects/fademessage/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QApplication>
+
+#include "fademessage.h"
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    FadeMessage widget;
+    widget.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Popup Message with Effect"));
+    widget.setFixedSize(400, 600);
+    widget.show();
+
+    return app.exec();
+}