QPlatformWindow: add startSystemMove()

It can be used by custom widgets or for example by
the Breeze style from KDE, which allows to drag windows
by some widgets.

It's important on X11 because _NET_WM_MOVERESIZE requests
induced by touch sequences require support from Qt.

Task-number: QTBUG-58044
Change-Id: I31c37534555a9050cf361cad85bdef13c2808572
Reviewed-by: Johan Helsing <johan.helsing@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/plugins/platforms/xcb/qxcbwindow.h b/src/plugins/platforms/xcb/qxcbwindow.h
index 638ab26cea..f506d7dd6f 100644
--- a/src/plugins/platforms/xcb/qxcbwindow.h
+++ b/src/plugins/platforms/xcb/qxcbwindow.h
@@ -110,6 +110,7 @@ public:
     void windowEvent(QEvent *event) override;
 
     bool startSystemResize(const QPoint &pos, Qt::Corner corner) override;
+    bool startSystemMove(const QPoint &pos) override;
 
     void setOpacity(qreal level) override;
     void setMask(const QRegion &region) override;
@@ -177,7 +178,8 @@ public:
 
     QXcbScreen *xcbScreen() const;
 
-    bool doStartSystemResize(const QPoint &globalPos, Qt::Corner corner);
+    bool startSystemMoveResize(const QPoint &pos, int corner);
+    bool doStartSystemMoveResize(const QPoint &globalPos, int corner);
 
     virtual void create();
     virtual void destroy();