qt 6.5.1 original

examples/widgets/draganddrop/draggabletext/CMakeLists.txt

@@ -0,0 +1,49 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(draggabletext LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/draggabletext")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(draggabletext
+    dragwidget.cpp dragwidget.h
+    main.cpp
+)
+
+set_target_properties(draggabletext PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(draggabletext PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+# Resources:
+set(draggabletext_resource_files
+    "words.txt"
+)
+
+qt_add_resources(draggabletext "draggabletext"
+    PREFIX
+        "/dictionary"
+    FILES
+        ${draggabletext_resource_files}
+)
+
+install(TARGETS draggabletext
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/draganddrop/draggabletext/draggabletext.pro

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+QT += widgets
+
+HEADERS     = dragwidget.h
+RESOURCES   = draggabletext.qrc
+SOURCES     = dragwidget.cpp \
+              main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/draganddrop/draggabletext
+INSTALLS += target

examples/widgets/draganddrop/draggabletext/draggabletext.qrc

@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource prefix="/dictionary">
+   <file>words.txt</file>
+</qresource>
+</RCC>

examples/widgets/draganddrop/draggabletext/dragwidget.cpp

@@ -0,0 +1,130 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QtWidgets>
+
+#include "dragwidget.h"
+
+static QLabel *createDragLabel(const QString &text, QWidget *parent)
+{
+    QLabel *label = new QLabel(text, parent);
+    label->setAutoFillBackground(true);
+    label->setFrameShape(QFrame::Panel);
+    label->setFrameShadow(QFrame::Raised);
+    return label;
+}
+
+static QString hotSpotMimeDataKey() { return QStringLiteral("application/x-hotspot"); }
+
+DragWidget::DragWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    QFile dictionaryFile(QStringLiteral(":/dictionary/words.txt"));
+    dictionaryFile.open(QIODevice::ReadOnly);
+    QTextStream inputStream(&dictionaryFile);
+
+    int x = 5;
+    int y = 5;
+
+    while (!inputStream.atEnd()) {
+        QString word;
+        inputStream >> word;
+        if (!word.isEmpty()) {
+            QLabel *wordLabel = createDragLabel(word, this);
+            wordLabel->move(x, y);
+            wordLabel->show();
+            wordLabel->setAttribute(Qt::WA_DeleteOnClose);
+            x += wordLabel->width() + 2;
+            if (x >= 245) {
+                x = 5;
+                y += wordLabel->height() + 2;
+            }
+        }
+    }
+
+    setAcceptDrops(true);
+    setMinimumSize(400, qMax(200, y));
+    setWindowTitle(tr("Draggable Text"));
+}
+
+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::dropEvent(QDropEvent *event)
+{
+    if (event->mimeData()->hasText()) {
+        const QMimeData *mime = event->mimeData();
+        QStringList pieces = mime->text().split(QRegularExpression(QStringLiteral("\\s+")),
+                                                Qt::SkipEmptyParts);
+        QPoint position = event->position().toPoint();
+        QPoint hotSpot;
+
+        QByteArrayList hotSpotPos = mime->data(hotSpotMimeDataKey()).split(' ');
+        if (hotSpotPos.size() == 2) {
+            hotSpot.setX(hotSpotPos.first().toInt());
+            hotSpot.setY(hotSpotPos.last().toInt());
+        }
+
+        for (const QString &piece : pieces) {
+            QLabel *newLabel = createDragLabel(piece, this);
+            newLabel->move(position - hotSpot);
+            newLabel->show();
+            newLabel->setAttribute(Qt::WA_DeleteOnClose);
+
+            position += QPoint(newLabel->width(), 0);
+        }
+
+        if (event->source() == this) {
+            event->setDropAction(Qt::MoveAction);
+            event->accept();
+        } else {
+            event->acceptProposedAction();
+        }
+    } else {
+        event->ignore();
+    }
+    for (QWidget *widget : findChildren<QWidget *>()) {
+        if (!widget->isVisible())
+            widget->deleteLater();
+    }
+}
+
+void DragWidget::mousePressEvent(QMouseEvent *event)
+{
+    QLabel *child = qobject_cast<QLabel*>(childAt(event->position().toPoint()));
+    if (!child)
+        return;
+
+    QPoint hotSpot = event->position().toPoint() - child->pos();
+
+    QMimeData *mimeData = new QMimeData;
+    mimeData->setText(child->text());
+    mimeData->setData(hotSpotMimeDataKey(),
+                      QByteArray::number(hotSpot.x()) + ' ' + QByteArray::number(hotSpot.y()));
+
+    qreal dpr = window()->windowHandle()->devicePixelRatio();
+    QPixmap pixmap(child->size() * dpr);
+    pixmap.setDevicePixelRatio(dpr);
+    child->render(&pixmap);
+
+    QDrag *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();
+}

examples/widgets/draganddrop/draggabletext/dragwidget.h

@@ -0,0 +1,25 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef DRAGWIDGET_H
+#define DRAGWIDGET_H
+
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QDragEnterEvent;
+class QDropEvent;
+QT_END_NAMESPACE
+
+class DragWidget : public QWidget
+{
+public:
+    explicit DragWidget(QWidget *parent = nullptr);
+
+protected:
+    void dragEnterEvent(QDragEnterEvent *event) override;
+    void dropEvent(QDropEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
+};
+
+#endif // DRAGWIDGET_H

examples/widgets/draganddrop/draggabletext/main.cpp

@@ -0,0 +1,16 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QApplication>
+
+#include "dragwidget.h"
+
+int main(int argc, char *argv[])
+{
+    Q_INIT_RESOURCE(draggabletext);
+
+    QApplication app(argc, argv);
+    DragWidget window;
+    window.show();
+    return app.exec();
+}

examples/widgets/draganddrop/draggabletext/words.txt

@@ -0,0 +1,41 @@
+Qt
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+articles
+written
+by
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