From cd0d74d491e1ed6b9cba0c1024041c0b9becaa7b Mon Sep 17 00:00:00 2001
From: Martin Preuss <martin@aquamaniac.de>
Date: Mon, 11 May 2026 00:40:28 +0200
Subject: [PATCH] MainWindow: no longer auto-create content widget

will be called later by deriving classes upon SHOW signal to save on
SDRAM.
---
 avr/modules/lcd2/gui/base/mainwindow.asm | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/avr/modules/lcd2/gui/base/mainwindow.asm b/avr/modules/lcd2/gui/base/mainwindow.asm
index c361d99..c01a8c2 100644
--- a/avr/modules/lcd2/gui/base/mainwindow.asm
+++ b/avr/modules/lcd2/gui/base/mainwindow.asm
@@ -14,9 +14,10 @@
 ; ***************************************************************************
 ; defines
 
-.equ MAINWINDOW_OFFS_BEGIN    =  VLAYOUT_SIZE
-; no data for now
-.equ MAINWINDOW_SIZE          =  MAINWINDOW_OFFS_BEGIN+0
+.equ MAINWINDOW_OFFS_BEGIN      =  VLAYOUT_SIZE
+.equ MAINWINDOW_OFFS_PREVWIN_LO =  MAINWINDOW_OFFS_BEGIN+0
+.equ MAINWINDOW_OFFS_PREVWIN_HI =  MAINWINDOW_OFFS_BEGIN+1
+.equ MAINWINDOW_SIZE            =  MAINWINDOW_OFFS_BEGIN+2
 
 
 ; index of sub-windows
@@ -96,7 +97,6 @@ MainWindow_Init:
 
   ; create sub widgets
   rcall mainWindowCreateTitleWidget
-  rcall mainWindowCreateContentWidget
 
   ret
 ; @end
@@ -221,13 +221,13 @@ mainWindowCreateTitleWidget_done:
 
 
 ; ---------------------------------------------------------------------------
-; @routine mainWindowCreateContentWidget
+; @routine MainWindow_CreateContentWidget
 ;
 ; @param Y address of main window widget
-; @param r21:r20 ressource id for title
 ; @return CFLAG set of okay, cleared otherwise
+; @return r19:r18 pointer to created widget
 
-mainWindowCreateContentWidget:
+MainWindow_CreateContentWidget:
   ; create content widget
   push yl
     push yh
@@ -237,13 +237,15 @@ mainWindowCreateContentWidget:
       ldi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_FILLED<<WIDGET_PACK_VSELF0_BIT) ; PACK
       ldi r20, VLAYOUT_MODE_EXPAND
       bigcall VLayout_new
-      brcc mainWindowCreateContentWidget_done
-      ; set style for title widget
+      brcc MainWindow_CreateContentWidget_done
+      ; set style for content widget
       ldi r16, LOW(DefaultStyle_Window*2)
       std Y+WIDGET_OFFS_STYLE_LO, r16
       ldi r16, HIGH(DefaultStyle_Window*2)
       std Y+WIDGET_OFFS_STYLE_HI, r16
-mainWindowCreateContentWidget_done:
+      mov r18, yl
+      mov r19, yh
+MainWindow_CreateContentWidget_done:
     pop yh
   pop yl
   ret