qt 6.5.1 original

tests/manual/highdpi/kitchensink/CMakeLists.txt

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+
+#####################################################################
+## kitchensink Binary:
+#####################################################################
+
+qt_internal_add_manual_test(kitchensink
+    SOURCES
+        dragwidget.cpp dragwidget.h
+        main.cpp
+    DEFINES
+        HAVE_SCREEN_BASE_DPI
+    INCLUDE_DIRECTORIES
+        .
+    LIBRARIES
+        Qt::Gui
+        Qt::GuiPrivate
+        Qt::Widgets
+)
+
+# Resources:
+set(kitchensink_resource_files
+    "qticon16.png"
+    "qticon16@2x.png"
+    "qticon16@3x.png"
+    "qticon32.png"
+    "qticon32@2x.png"
+    "qticon64.png"
+)
+
+qt_internal_add_resource(kitchensink "kitchensink"
+    PREFIX
+        "/"
+    FILES
+        ${kitchensink_resource_files}
+)

tests/manual/highdpi/kitchensink/dragwidget.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 <QtWidgets>
+#include "dragwidget.h"
+
+class FramedLabel : public QLabel
+{
+public:
+    FramedLabel(const QString &text, QWidget *parent)
+        : QLabel(text, parent)
+    {
+        setAutoFillBackground(true);
+        setFrameShape(QFrame::Panel);
+        setFrameShadow(QFrame::Raised);
+    }
+};
+
+DragWidget::DragWidget(QString text, QWidget *parent)
+    : QWidget(parent)
+{
+    int x = 5;
+    int y = 5;
+
+    bool createChildWindow = text.isEmpty(); // OK, yes this is a hack...
+    if (text.isEmpty())
+        text = "You can drag from this window and drop text here";
+
+    QStringList words = text.split(' ');
+    for (const QString &word : words) {
+        if (!word.isEmpty()) {
+            auto wordLabel = new FramedLabel(word, this);
+            wordLabel->move(x, y);
+            wordLabel->show();
+            x += wordLabel->width() + 2;
+            if (x >= 245) {
+                x = 5;
+                y += wordLabel->height() + 2;
+            }
+        }
+    }
+
+    /*
+    QPalette newPalette = palette();
+    newPalette.setColor(QPalette::Window, Qt::white);
+    setPalette(newPalette);
+    */
+
+    setAcceptDrops(true);
+    setMinimumSize(400, qMax(200, y));
+    setWindowTitle(tr("Draggable Text Window %1").arg(createChildWindow ? 1 : 2));
+    if (createChildWindow)
+        otherWindow = new DragWidget("Here is a second window that accepts drops");
+}
+
+void DragWidget::dragEnterEvent(QDragEnterEvent *event)
+{
+    if (event->mimeData()->hasText()) {
+        if (event->source() == this) {
+            event->setDropAction(Qt::MoveAction);
+            event->accept();
+        } else {
+            event->acceptProposedAction();
+        }
+    } else {
+        event->ignore();
+    }
+}
+
+void DragWidget::dragMoveEvent(QDragMoveEvent * event)
+{
+    dragPos = event->pos();
+    dragTimer.start(500, this);
+    update();
+}
+
+void DragWidget::dragLeaveEvent(QDragLeaveEvent *)
+{
+    dragTimer.stop();
+    update();
+}
+
+void DragWidget::dropEvent(QDropEvent *event)
+{
+    if (event->mimeData()->hasText()) {
+        const QMimeData *mime = event->mimeData();
+        QStringList pieces = mime->text().split(QRegularExpression("\\s+"),
+                             Qt::SkipEmptyParts);
+        QPoint position = event->pos();
+        QPoint hotSpot;
+
+        QList<QByteArray> hotSpotPos = mime->data("application/x-hotspot").split(' ');
+        if (hotSpotPos.size() == 2) {
+            hotSpot.setX(hotSpotPos.first().toInt());
+            hotSpot.setY(hotSpotPos.last().toInt());
+        }
+        dropPos = position - hotSpot;
+        dropTimer.start(500, this);
+        update();
+
+        foreach (QString piece, pieces) {
+            FramedLabel *newLabel = new FramedLabel(piece, this);
+            newLabel->move(position - hotSpot);
+            newLabel->show();
+
+            position += QPoint(newLabel->width(), 0);
+        }
+
+        if (event->source() == this) {
+            event->setDropAction(Qt::MoveAction);
+            event->accept();
+        } else {
+            event->acceptProposedAction();
+        }
+    } else {
+        event->ignore();
+    }
+    for (QObject *child : children()) {
+        if (child->isWidgetType()) {
+            auto widget = static_cast<QWidget *>(child);
+            if (!widget->isVisible())
+                widget->deleteLater();
+        }
+    }
+}
+
+void DragWidget::mousePressEvent(QMouseEvent *event)
+{
+    QLabel *child = static_cast<QLabel*>(childAt(event->pos()));
+    if (!child)
+        return;
+
+    QPoint hotSpot = event->pos() - child->pos();
+
+    QMimeData *mimeData = new QMimeData;
+    mimeData->setText(child->text());
+    mimeData->setData("application/x-hotspot",
+                      QByteArray::number(hotSpot.x()) + ' ' + QByteArray::number(hotSpot.y()));
+
+    const qreal dpr = devicePixelRatio() > 1 && !(QGuiApplication::keyboardModifiers() & Qt::ShiftModifier)
+        ? devicePixelRatio() : 1;
+
+    QPixmap pixmap(child->size() * dpr);
+    pixmap.setDevicePixelRatio(dpr);
+    child->render(&pixmap);
+
+    auto drag = new QDrag(this);
+    drag->setMimeData(mimeData);
+    drag->setPixmap(pixmap);
+    drag->setHotSpot(hotSpot);
+
+    Qt::DropAction dropAction = drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction);
+
+    if (dropAction == Qt::MoveAction)
+        child->close();
+}
+
+void DragWidget::timerEvent(QTimerEvent *e)
+{
+    if (e->timerId() == dragTimer.timerId())
+        dragTimer.stop();
+    if (e->timerId() == dropTimer.timerId())
+        dropTimer.stop();
+    update();
+}
+
+void DragWidget::paintEvent(QPaintEvent *)
+{
+    QPainter p(this);
+    p.fillRect(rect(), Qt::white);
+
+    if (dropTimer.isActive()) {
+        p.setBrush(Qt::red);
+        p.drawEllipse(dropPos, 50, 50);
+    }
+
+    if (dragTimer.isActive()) {
+        p.setPen(QPen(Qt::blue, 5));
+        QPoint p1 = (rect().topLeft()*3 + rect().bottomRight())/4;
+        QPoint p2 = (rect().topLeft() + rect().bottomRight()*3)/4;
+        p.drawLine(p1, dragPos);
+        p.drawLine(p2, dragPos);
+    }
+}
+
+void DragWidget::showEvent(QShowEvent *)
+{
+    if (otherWindow)
+        otherWindow->show();
+}
+
+void DragWidget::hideEvent(QHideEvent *)
+{
+    if (otherWindow)
+        otherWindow->hide();
+}

tests/manual/highdpi/kitchensink/dragwidget.h

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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
+
+#ifndef DRAGWIDGET_H
+#define DRAGWIDGET_H
+
+#include <QWidget>
+#include <QBasicTimer>
+
+QT_BEGIN_NAMESPACE
+class QDragEnterEvent;
+class QDropEvent;
+QT_END_NAMESPACE
+
+class DragWidget : public QWidget
+{
+public:
+    DragWidget(QString text = QString(), QWidget *parent = nullptr);
+
+protected:
+    void dragEnterEvent(QDragEnterEvent *event) override;
+    void dragLeaveEvent(QDragLeaveEvent *event) override;
+    void dropEvent(QDropEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
+    void dragMoveEvent(QDragMoveEvent * event) override;
+    void paintEvent(QPaintEvent *) override;
+    void timerEvent(QTimerEvent *event) override;
+    void showEvent(QShowEvent *event) override;
+    void hideEvent(QHideEvent *event) override;
+
+private:
+    QPoint dragPos;
+    QPoint dropPos;
+    QBasicTimer dragTimer;
+    QBasicTimer dropTimer;
+    QWidget *otherWindow = nullptr;
+};
+
+#endif // DRAGWIDGET_H

tests/manual/highdpi/kitchensink/kitchensink.pro

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+TEMPLATE = app
+TARGET = kitchensink
+INCLUDEPATH += .
+QT += widgets gui-private
+CONFIG += cmdline
+CONFIG += c++11
+# Input
+SOURCES += \
+        dragwidget.cpp \
+        main.cpp
+
+HEADERS += \
+        dragwidget.h
+
+RESOURCES += \
+    kitchensink.qrc
+
+DEFINES += HAVE_SCREEN_BASE_DPI

tests/manual/highdpi/kitchensink/kitchensink.qrc

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+<RCC>
+    <qresource prefix="/">
+        <file>qticon16.png</file>
+        <file>qticon16@2x.png</file>
+        <file>qticon16@3x.png</file>
+        <file>qticon32.png</file>
+        <file>qticon32@2x.png</file>
+        <file>qticon64.png</file>
+    </qresource>
+</RCC>