support native focus for drawing sub region

Change-Id: I9862f060b9d5b2c3015c084060887f2d66f1ed01
Reviewed-on: https://gerrit.libreoffice.org/53768
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

include/svx/dlgctrl.hxx

@@ -194,6 +194,7 @@ public:
     DECL_LINK(DoGetFocus, weld::Widget&, void);
     DECL_LINK(DoLoseFocus, weld::Widget&, void);
     DECL_LINK(MarkToResetSettings, weld::Widget&, void);
+    DECL_LINK(DoFocusRect, weld::Widget&, tools::Rectangle);
 
     void                Reset();
     RectPoint           GetActualRP() const { return eRP;}

include/vcl/weld.hxx

@@ -701,6 +701,7 @@ protected:
     Link<const KeyEvent&, bool> m_aKeyPressHdl;
     Link<const KeyEvent&, bool> m_aKeyReleaseHdl;
     Link<Widget&, void> m_aStyleUpdatedHdl;
+    Link<Widget&, tools::Rectangle> m_aGetFocusRectHdl;
 
 public:
     void connect_draw(const Link<draw_args, void>& rLink) { m_aDrawHdl = rLink; }
@@ -720,6 +721,10 @@ public:
     void connect_key_press(const Link<const KeyEvent&, bool>& rLink) { m_aKeyPressHdl = rLink; }
     void connect_key_release(const Link<const KeyEvent&, bool>& rLink) { m_aKeyReleaseHdl = rLink; }
     void connect_style_updated(const Link<Widget&, void>& rLink) { m_aStyleUpdatedHdl = rLink; }
+    void connect_focus_rect(const Link<Widget&, tools::Rectangle>& rLink)
+    {
+        m_aGetFocusRectHdl = rLink;
+    }
     virtual void queue_draw() = 0;
     virtual void queue_draw_area(int x, int y, int width, int height) = 0;
     virtual a11yref get_accessible_parent() = 0;

svx/source/dialog/dlgctrl.cxx

@@ -684,6 +684,7 @@ RectCtl::RectCtl(weld::Builder& rBuilder, const OString& rDrawingId, SvxTabPage*
     m_xControl->connect_key_press(LINK(this, RectCtl, DoKeyDown));
     m_xControl->connect_focus_in(LINK(this, RectCtl, DoGetFocus));
     m_xControl->connect_focus_out(LINK(this, RectCtl, DoLoseFocus));
+    m_xControl->connect_focus_rect(LINK(this, RectCtl, DoFocusRect));
 
     m_xControl->set_size_request(m_xControl->get_approximate_digit_width() * 25, m_xControl->get_text_height() * 5);
     Resize_Impl();
@@ -976,12 +977,14 @@ IMPL_LINK(RectCtl, DoPaint, weld::DrawingArea::draw_args, aPayload, void)
             rRenderContext.DrawBitmap(aCenterPt, aDstBtnSize, aBtnPnt2, aBtnSize, rBitmap.GetBitmap());
         }
     }
+}
 
-    if (m_xControl->has_focus())
+IMPL_LINK(RectCtl, DoFocusRect, weld::Widget&, rControl, tools::Rectangle)
-    {
+{
-        tools::Rectangle aFocusRect(CalculateFocusRectangle());
+    tools::Rectangle aRet;
-        rRenderContext.Invert(aFocusRect, InvertFlags(0xffff));
+    if (rControl.has_focus())
-    }
+        aRet = CalculateFocusRectangle();
+    return aRet;
 }
 
 // Convert RectPoint Point

vcl/source/app/salvtables.cxx

@@ -1683,6 +1683,9 @@ public:
 IMPL_LINK(SalInstanceDrawingArea, PaintHdl, target_and_area, aPayload, void)
 {
     m_aDrawHdl.Call(aPayload);
+    tools::Rectangle aFocusRect(m_aGetFocusRectHdl.Call(*this));
+    if (!aFocusRect.IsEmpty())
+        aPayload.first.Invert(aFocusRect, InvertFlags(0xffff));
 }
 
 IMPL_LINK(SalInstanceDrawingArea, ResizeHdl, const Size&, rSize, void)

vcl/unx/gtk3/gtk3gtkinst.cxx

@@ -3506,6 +3506,13 @@ private:
 
         cairo_set_source_surface(cr, m_pSurface, 0, 0);
         cairo_paint(cr);
+
+        tools::Rectangle aFocusRect(m_aGetFocusRectHdl.Call(*this));
+        if (!aFocusRect.IsEmpty())
+        {
+            gtk_render_focus(gtk_widget_get_style_context(GTK_WIDGET(m_pDrawingArea)), cr,
+                             aFocusRect.Left(), aFocusRect.Top(), aFocusRect.GetWidth(), aFocusRect.GetHeight());
+        }
     }
     static void signalSizeAllocate(GtkWidget*, GdkRectangle* allocation, gpointer widget)
     {