gui2: added default Layout handler to widget class.

avr/modules/lcd2/gui2/base/widget.asm

@@ -206,6 +206,11 @@ Widget_Init_setDefaultSize:
   breq Widget_Init_ret
   bigcall OBJ_AddChild                   ; (r18, r19)
 
+  ; preset flags
+  ldd r16, Y+OBJECT_OFFS_FLAGS
+  sbr r16, (1<<WIDGET_FLAGS_DIRTY_BIT) | (1<<WIDGET_FLAGS_LAYOUT_BIT)
+  std Y+OBJECT_OFFS_FLAGS, r16
+  
 Widget_Init_ret:
   ret
 ; @end
@@ -360,6 +365,23 @@ Widget_OnDrawNop:
 
 
 
+; ---------------------------------------------------------------------------
+; @routine Widget_OnLayout @global
+;
+; @param Y address of widget
+; @return CFLAG set if signal handled
+; @clobbers any, !Y
+
+Widget_OnLayout:
+  ldd r17, Y+OBJECT_OFFS_FLAGS
+  ; only clear layout bit
+  cbr r17, (1<<WIDGET_FLAGS_LAYOUT_BIT)
+  std Y+OBJECT_OFFS_FLAGS, r17
+  sec
+  ret
+; @end
+
+
 ; ---------------------------------------------------------------------------
 ; @routine Widget_OnGetValue @global
 ;
@@ -1002,6 +1024,7 @@ Widget_DefaultSignalmap:
   .dw Object_DefaultSignalmap  ; next table to use
   ; entries
   .db 0, WIDGET_SIGNAL_DRAW,     LOW(Widget_OnDraw),     HIGH(Widget_OnDraw)
+  .db 0, WIDGET_SIGNAL_LAYOUT,   LOW(Widget_OnLayout),   HIGH(Widget_OnLayout)
   .db 0, WIDGET_SIGNAL_GETVALUE, LOW(Widget_OnGetValue), HIGH(Widget_OnGetValue)  ; handle any value here
   .db 0, 0, 0, 0  ; end of table