1 files changed, 66 insertions, 0 deletions
diff --git a/examples/demos/documentviewer/hoverwatcher.h b/examples/demos/documentviewer/hoverwatcher.h
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+++ b/examples/demos/documentviewer/hoverwatcher.h
@@ -0,0 +1,66 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef HOVERWATCHER_H
+#define HOVERWATCHER_H
+#include <QObject>
+#include <QEvent>
+#include <QScroller>
+
+class QWidget;
+class HoverWatcher : public QObject
+{
+    Q_OBJECT
+
+private:
+    explicit HoverWatcher(QWidget *watched);
+    static QMap<QWidget *, HoverWatcher *> m_hoverWatchers;
+
+public:
+    ~HoverWatcher();
+
+    enum HoverAction {
+        Entered,
+        MousePress,
+        MouseRelease,
+        Left,
+        Ignore
+    };
+    Q_ENUM(HoverAction);
+
+    bool eventFilter(QObject *obj, QEvent *event) override;
+
+    Qt::CursorShape cursorShape(HoverAction type) const;
+    Qt::MouseButtons mouseButtons() const { return m_mouseButtons; }
+
+    static HoverWatcher *watcher(QWidget *watched);
+    static const HoverWatcher *watcher(const QWidget *watched);
+    static bool hasWatcher(QWidget *widget);
+    static void dismiss(QWidget *watched);
+
+public slots:
+    void setCursorShape(HoverAction type, Qt::CursorShape shape);
+    void unSetCursorShape(HoverAction type);
+    void setMouseButtons(Qt::MouseButtons buttons);
+    void setMouseButton(Qt::MouseButton button, bool enable);
+
+signals:
+    void entered();
+    void mousePressed();
+    void mouseReleased();
+    void left();
+    void hoverAction(HoverAction action);
+
+private slots:
+    void handleScrollerStateChange(QScroller::State state);
+
+private:
+    QWidget *m_watched;
+    std::array<std::optional<Qt::CursorShape>, HoverAction::Ignore> m_cursorShapes;
+    Qt::MouseButtons m_mouseButtons = Qt::MouseButton::LeftButton;
+    void handleAction(HoverAction action);
+    void setApplicationCursor(HoverAction action) const;
+    bool hasShape(HoverAction action) const;
+};
+
+#endif // HOVERWATCHER_H