Mobile: Draw optimizations; focus handling

Widgets can now be marked for buffering their contents, which is useful if their contents change seldom but they are drawn often.

For example, the navbar is always visible but doesn't change very often, and during animations menu contents are static but there is a moving animation so everything gets drawn 60 FPS.

Focus handling was also improved so the lookup results can be scrolled while entering text, and one can tap outside an input field to unfocus it.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/ui/mobile.c b/src/ui/mobile.c
index 6ea672e6..9e2dc4f7 100644
--- a/src/ui/mobile.c
+++ b/src/ui/mobile.c
@@ -357,6 +357,7 @@ static iWidget *addChildPanel_(iWidget *parent, iLabelWidget *panelButton,
     setId_Widget(panel, "panel");
     setUserData_Object(panelButton, panel);
     setBackgroundColor_Widget(panel, uiBackground_ColorId);
+    setDrawBufferEnabled_Widget(panel, iTrue);
     setId_Widget(addChild_Widget(panel, iClob(makePadding_Widget(0))), "panel.toppad");
     if (titleText) {
         iLabelWidget *title =
@@ -601,6 +602,7 @@ void initPanels_Mobile(iWidget *panels, iWidget *parentWidget,
     /* The panel roots. */
     iWidget *topPanel = new_Widget(); {
         setId_Widget(topPanel, "panel.top");
+        setDrawBufferEnabled_Widget(topPanel, iTrue);
         setCommandHandler_Widget(topPanel, topPanelHandler_);
         setFlags_Widget(topPanel,
                         arrangeVertical_WidgetFlag | resizeWidthOfChildren_WidgetFlag |
@@ -730,7 +732,7 @@ void initPanels_Mobile(iWidget *panels, iWidget *parentWidget,
     updatePanelSheetMetrics_(panels);
     arrange_Widget(panels);
     postCommand_App("widget.overflow"); /* with the correct dimensions */    
-    printTree_Widget(panels);
+//    printTree_Widget(panels);
 }
 
 #if 0