gui: added OBJ_GetChildBySelector

avr/modules/lcd2/gui/base/object.asm

@@ -356,6 +356,38 @@ OBJ_GetChildAt_ret:
 
 
 
+; ---------------------------------------------------------------------------
+; @routine OBJ_GetChildBySelector @global
+;
+; @param Y   address of object
+; @param R16 selector to look for
+; @return CFLAG set, if found, cleared otherwise
+; @return r19:r18 resulting object
+; @clobbers r17
+
+OBJ_GetChildBySelector:
+  push yl
+    push yh
+      rcall OBJ_GetFirstChild     ; R19:R18=obj (none)
+OBJ_GetChildBySelector_loop:
+        brcc OBJ_GetChildBySelector_ret
+        mov yl, r18
+        mov yh, r19
+        ldd r17, Y+OBJECT_OFFS_SELECTOR
+        cp r17, r16
+        breq OBJ_GetChildBySelector_secRet
+        rcall OBJ_GetNext         ; R19:R18=obj (none)
+      rjmp OBJ_GetChildBySelector_loop
+OBJ_GetChildBySelector_secRet:
+      sec
+OBJ_GetChildBySelector_ret:
+    pop yh
+  pop yl
+  ret
+; @end
+
+
+
 ; ---------------------------------------------------------------------------
 ; @routine OBJ_SkipObjects @global
 ;