gtk3+wayland: enable manual movement of toolbars

via gtk_window_begin_move_drag so add some BYDRAG/ByDrag hints
to select mechanism to move window by

Change-Id: Icc58653dff752a6d4ee49446647d7ede2af9dd9b

include/vcl/window.hxx

@@ -162,10 +162,11 @@ enum class PosSizeFlags
     PosSize          = Pos | Size,
     All              = PosSize,
     Dropdown         = 0x0010,
+    ByDrag           = 0x0020,
 };
 namespace o3tl
 {
-    template<> struct typed_flags<PosSizeFlags> : is_typed_flags<PosSizeFlags, 0x001f> {};
+    template<> struct typed_flags<PosSizeFlags> : is_typed_flags<PosSizeFlags, 0x003f> {};
 }
 
 // Flags for Show()

vcl/inc/brdwin.hxx

@@ -169,6 +169,8 @@ public:
 
     Rectangle               GetMenuRect() const;
 
+    void                    MoveToByDrag(const Point& rNewPos);
+
     virtual Size            GetOptimalSize() const override;
 };
 

vcl/inc/salframe.hxx

@@ -100,6 +100,7 @@ typedef sal_uInt64 SalExtStyle;
 #define SAL_FRAME_POSSIZE_Y                 ((sal_uInt16)0x0002)
 #define SAL_FRAME_POSSIZE_WIDTH             ((sal_uInt16)0x0004)
 #define SAL_FRAME_POSSIZE_HEIGHT            ((sal_uInt16)0x0008)
+#define SAL_FRAME_POSSIZE_BYDRAG            ((sal_uInt16)0x0010)
 
 struct SystemParentData;
 struct ImplSVEvent;

vcl/inc/unx/gtk/gtkframe.hxx

@@ -302,7 +302,10 @@ class GtkSalFrame : public SalFrame, public X11WindowProvider
     void widget_set_size_request(long nWidth, long nHeight);
 
     void resizeWindow( long nWidth, long nHeight );
-    void moveWindow( long nX, long nY );
+    void moveWindow(long nX, long nY);
+#if GTK_CHECK_VERSION(3,0,0)
+    void dragWindowTo(long nX, long nY);
+#endif
 
     Size calcDefaultSize();
 

vcl/source/window/brdwin.cxx

@@ -1243,7 +1243,7 @@ bool ImplStdBorderWindowView::Tracking( const TrackingEvent& rTEvt )
                 aPos.Y() += aMousePos.Y();
                 if ( maFrameData.mbDragFull )
                 {
-                    pBorderWindow->SetPosPixel( aPos );
+                    pBorderWindow->MoveToByDrag(aPos);
                     pBorderWindow->ImplUpdateAll();
                     pBorderWindow->ImplGetFrameWindow()->ImplUpdateAll();
                 }
@@ -2179,6 +2179,11 @@ Rectangle ImplBorderWindow::GetMenuRect() const
     return mpBorderView->GetMenuRect();
 }
 
+void ImplBorderWindow::MoveToByDrag(const Point& rNewPos)
+{
+    setPosSizePixel(rNewPos.X(), rNewPos.Y(), 0, 0, PosSizeFlags::Pos | PosSizeFlags::ByDrag);
+}
+
 Size ImplBorderWindow::GetOptimalSize() const
 {
     const vcl::Window* pClientWindow = ImplGetClientWindow();

vcl/source/window/window.cxx

@@ -2909,6 +2909,8 @@ void Window::setPosSizePixel( long nX, long nY,
             nSysFlags |= SAL_FRAME_POSSIZE_WIDTH;
         if( nFlags & PosSizeFlags::Height )
             nSysFlags |= SAL_FRAME_POSSIZE_HEIGHT;
+        if( nFlags & PosSizeFlags::ByDrag )
+            nSysFlags |= SAL_FRAME_POSSIZE_BYDRAG;
         if( nFlags & PosSizeFlags::X )
         {
             nSysFlags |= SAL_FRAME_POSSIZE_X;

vcl/unx/gtk3/gtk3gtkframe.cxx

@@ -872,6 +872,14 @@ void GtkSalFrame::moveWindow( long nX, long nY )
         gtk_window_move( GTK_WINDOW(m_pWindow), nX, nY );
 }
 
+void GtkSalFrame::dragWindowTo(long nX, long nY)
+{
+    if (isChild(false))
+        moveWindow(nX, nY);
+    else
+        gtk_window_begin_move_drag(GTK_WINDOW(m_pWindow), 1, nX, nY, GDK_CURRENT_TIME);
+}
+
 void GtkSalFrame::widget_set_size_request(long nWidth, long nHeight)
 {
     gtk_widget_set_size_request(GTK_WIDGET(m_pFixedContainer), nWidth, nHeight );
@@ -1579,7 +1587,10 @@ void GtkSalFrame::SetPosSize( long nX, long nY, long nWidth, long nHeight, sal_u
 
         m_bDefaultPos = false;
 
-        moveWindow(nX, nY);
+        if (nFlags & SAL_FRAME_POSSIZE_BYDRAG)
+            dragWindowTo(nX, nY);
+        else
+            moveWindow(nX, nY);
 
         updateScreenNumber();
     }