1 files changed, 71 insertions, 1 deletions

diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index dad1b6ba2d..c099ec9692 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -1051,6 +1051,71 @@ void QWindow::lower()
 }
 
 /*!
+    \brief Start a system-specific resize operation
+    \since 5.15
+
+    Calling this will start an interactive resize operation on the window by platforms
+    that support it. The actual behavior may vary depending on the platform. Usually,
+    it will make the window resize so that its edge follows the mouse cursor.
+
+    On platforms that support it, this method of resizing windows is preferred over
+    \c setGeometry, because it allows a more native look-and-feel of resizing windows, e.g.
+    letting the window manager snap this window against other windows, or special resizing
+    behavior with animations when dragged to the edge of the screen.
+
+    \a edges should either be a single edge, or two adjacent edges (a corner). Other values
+    are not allowed.
+
+    Returns true if the operation was supported by the system.
+*/
+bool QWindow::startSystemResize(Qt::Edges edges)
+{
+    Q_D(QWindow);
+    if (Q_UNLIKELY(!isVisible() || !d->platformWindow || d->maximumSize == d->minimumSize))
+        return false;
+
+    const bool isSingleEdge = edges == Qt::TopEdge || edges == Qt::RightEdge || edges == Qt::BottomEdge || edges == Qt::LeftEdge;
+    const bool isCorner =
+            edges == (Qt::TopEdge | Qt::LeftEdge) ||
+            edges == (Qt::TopEdge | Qt::RightEdge) ||
+            edges == (Qt::BottomEdge | Qt::RightEdge) ||
+            edges == (Qt::BottomEdge | Qt::LeftEdge);
+
+    if (Q_UNLIKELY(!isSingleEdge && !isCorner)) {
+        qWarning() << "Invalid edges" << edges << "passed to QWindow::startSystemResize, ignoring.";
+        return false;
+    }
+
+    return d->platformWindow->startSystemResize(edges);
+}
+
+/*!
+    \brief Start a system-specific move operation
+    \since 5.15
+
+    Calling this will start an interactive move operation on the window by platforms
+    that support it. The actual behavior may vary depending on the platform. Usually,
+    it will make the window follow the mouse cursor until a mouse button is released.
+
+    On platforms that support it, this method of moving windows is preferred over
+    \c setPosition, because it allows a more native look-and-feel of moving windows, e.g.
+    letting the window manager snap this window against other windows, or special tiling
+    or resizing behavior with animations when dragged to the edge of the screen.
+    Furthermore, on some platforms such as Wayland, \c setPosition is not supported, so
+    this is the only way the application can influence its position.
+
+    Returns true if the operation was supported by the system.
+*/
+bool QWindow::startSystemMove()
+{
+    Q_D(QWindow);
+    if (Q_UNLIKELY(!isVisible() || !d->platformWindow))
+        return false;
+
+    return d->platformWindow->startSystemMove();
+}
+
+/*!
     \property QWindow::opacity
     \brief The opacity of the window in the windowing system.
     \since 5.1
@@ -1793,7 +1858,10 @@ void QWindow::setFramePosition(const QPoint &point)
 
     The position is in relation to the virtualGeometry() of its screen.
 
-    \sa position()
+    For interactively moving windows, see startSystemMove(). For interactively
+    resizing windows, see startSystemResize().
+
+    \sa position(), startSystemMove()
 */
 void QWindow::setPosition(const QPoint &pt)
 {
@@ -1830,6 +1898,8 @@ void QWindow::setPosition(int posx, int posy)
     set the size of the window, excluding any window frame, to a QSize
     constructed from width \a w and height \a h
 
+    For interactively resizing windows, see startSystemResize().
+
     \sa size(), geometry()
 */
 void QWindow::resize(int w, int h)