avr/gui2: added screen saver app

screen saver can be turned off by:
- touching and releasing the display
- specific messages (e.g. motion detection msg from other nodes)

avr/modules/lcd2/gui2/generic/guiapp.asm

@@ -20,7 +20,9 @@
 .equ GUIAPP_OFFS_SDRAM_HI          =  GUIAPP_OFFS_GUIAPP+1
 .equ GUIAPP_OFFS_ROOTWIDGET_LO     =  GUIAPP_OFFS_GUIAPP+2
 .equ GUIAPP_OFFS_ROOTWIDGET_HI     =  GUIAPP_OFFS_GUIAPP+3
-.equ GUIAPP_SIZE                   =  GUIAPP_OFFS_GUIAPP+4
+.equ GUIAPP_OFFS_SCREENSAVER_LO    =  GUIAPP_OFFS_GUIAPP+4
+.equ GUIAPP_OFFS_SCREENSAVER_HI    =  GUIAPP_OFFS_GUIAPP+5
+.equ GUIAPP_SIZE                   =  GUIAPP_OFFS_GUIAPP+6
 
 ; signals
 .equ GUIAPP_SIGNAL_RAISE        =  OBJECT_SIGNAL_NEXTFREE+0 ; app->cntrl: X=WIDGET to raise
@@ -172,17 +174,51 @@ GuiApp_OnTouch:
 GuiApp_OnTouch_sendToAll:
       rcall GuiApp_GetRootWidgetToZ
       brcc GuiApp_OnTouch_done
-      ; send touch signal (TODO: check for grabbed touch)
+      ; send touch signal
       bigcall Widget_Tree_SendTouchSignal
 GuiApp_OnTouch_done:
     pop zh
   pop zl
+  ; send keepAlive to screensaver (if not active!)
+  rcall guiAppSendKeepAliveIfScreenSaverInactive
   sec
   ret
 ; @end
 
 
 
+; ---------------------------------------------------------------------------
+; @routine guiAppSendKeepAliveIfScreenSaverInactive
+;
+; @param Z byte address of guiapp object (for LPM!)
+; @clobbers any
+
+guiAppSendKeepAliveIfScreenSaverInactive:
+  push zl
+    push zh
+      rcall GuiApp_GetSdramPtr
+      adiw zh:zl, GUIAPP_OFFS_SCREENSAVER_LO
+      lpm r20, Z+
+      lpm r21, Z
+      sbiw zh:zl, GUIAPP_OFFS_SCREENSAVER_LO+1
+      ldd r16, Y+GUIAPP_SD_OFFS_CURRENTWIDGET_LO
+      cp r16, r20
+      brne guiAppSendKeepAliveIfScreenSaverInactive_send
+      ldd r16, Y+GUIAPP_SD_OFFS_CURRENTWIDGET_HI
+      cp r16, r21
+      breq guiAppSendKeepAliveIfScreenSaverInactive_end
+guiAppSendKeepAliveIfScreenSaverInactive_send:
+      mov zl, r20
+      mov zh, r21
+      bigcall ScreenSaver_KeepAlive
+guiAppSendKeepAliveIfScreenSaverInactive_end:
+    pop zh
+  pop zl  
+  ret
+; @end
+
+
+
 ; ---------------------------------------------------------------------------
 ; @routine GuiApp_OnMsgReceived @global
 ;
@@ -336,6 +372,22 @@ GuiApp_ShowView_ret:
 
 
 
+; ---------------------------------------------------------------------------
+; @routine GuiApp_GetCurrentView @global
+;
+; @param  Z byte address of object (for LPM!)
+; @return X byte address of current view object (for LPM!)
+; @clobbers Y
+
+GuiApp_GetCurrentView:
+  rcall GuiApp_GetSdramPtr                    ; Y=SDRAM
+  ldd xl, Y+GUIAPP_SD_OFFS_CURRENTWIDGET_LO
+  ldd xh, Y+GUIAPP_SD_OFFS_CURRENTWIDGET_HI
+  ret
+; @end
+
+
+
 
 ; ---------------------------------------------------------------------------
 ; @routine GuiApp_GrabTouchEvents