Added Lua function lcd.exitFullScreen()

radio/src/lua/api_colorlcd.cpp

@@ -22,10 +22,11 @@
 #include <cstdio>
 #include "opentx.h"
 #include "libopenui.h"
-
+#include "widget.h"
 #include "api_colorlcd.h"
 
 BitmapBuffer* luaLcdBuffer  = nullptr;
+Widget* runningFS = nullptr;
  
 static int8_t getTextHorizontalOffset(LcdFlags flags)
 {
@@ -1216,6 +1217,25 @@ static int luaLcdDrawHudRectangle(lua_State *L)
   return 0;
 }
 
+/*luadoc
+@function lcd.exitFullScreen()
+
+Exit full screen widget mode.
+
+@notice Only available on radios with color display
+
+@status current Introduced in 2.5.0
+*/
+static int luaLcdExitFullScreen(lua_State *L)
+{
+  if (runningFS) {
+    Widget* rfs = runningFS;
+    runningFS = nullptr;
+    rfs->setFullscreen(false);
+  }
+  return 0;
+}
+
 const luaL_Reg lcdLib[] = {
   { "refresh", luaLcdRefresh },
   { "clear", luaLcdClear },
@@ -1246,5 +1266,6 @@ const luaL_Reg lcdLib[] = {
   { "drawAnnulus", luaLcdDrawAnnulus },
   { "drawLineWithClipping", luaLcdDrawLineWithClipping },
   { "drawHudRectangle", luaLcdDrawHudRectangle },
+  { "exitFullScreen", luaLcdExitFullScreen },
   { NULL, NULL }  /* sentinel */
 };

radio/src/lua/api_colorlcd.h

@@ -39,5 +39,6 @@ constexpr int8_t text_vertical_offset[7] {2,2,0,2,3,3,7};
 
 extern bool           luaLcdAllowed;
 extern BitmapBuffer * luaLcdBuffer;
+extern Widget *       runningFS;
 
 LcdFlags flagsRGB(LcdFlags flags);

radio/src/lua/widgets.cpp

@@ -515,10 +515,12 @@ void LuaWidget::refresh(BitmapBuffer* dc)
   // This little hack is needed to not interfere with the LCD usage of preempted scripts
   bool lla = luaLcdAllowed;
   luaLcdAllowed = true;
+  runningFS = this;
 
   if (lua_pcall(lsWidgets, 3, 0, 0) != 0) {
     setErrorMessage("refresh()");
   }
+  runningFS = nullptr;
   // Remove LCD
   luaLcdAllowed = lla;
   luaLcdBuffer = nullptr;
@@ -537,9 +539,11 @@ void LuaWidget::background()
   if (factory->backgroundFunction) {
     lua_rawgeti(lsWidgets, LUA_REGISTRYINDEX, factory->backgroundFunction);
     lua_rawgeti(lsWidgets, LUA_REGISTRYINDEX, luaWidgetDataRef);
+    runningFS = this;
     if (lua_pcall(lsWidgets, 1, 0, 0) != 0) {
       setErrorMessage("background()");
     }
+    runningFS = nullptr;
   }
 }