LCL: add lcTransparentWindow LCL capability

git-svn-id: trunk@53193 -

lcl/interfacebase.pp

@@ -80,7 +80,8 @@ type
     lcAllowChildControlsInNativeControls, // Utilized by LCL-CustomDrawn so that it can inject child controls in native ones
     lcEmulatedMDI, // used for emulating MDI on widgetsets which does not provide native MDI handling
     lcAccessibilitySupport,     // Indicates that accessibility is implemented, mostly for TCustomControl descendents as native widgests should have in-built accessibility
-    lcRadialGradientBrush       // Indicates that the function CreateBrushWithRadialGradient is supported, i.e. we can create a brush with a radial gradient pattern
+    lcRadialGradientBrush,      // Indicates that the function CreateBrushWithRadialGradient is supported, i.e. we can create a brush with a radial gradient pattern
+    lcTransparentWindow         // ability to pass mouse messages through a window (on win32 LM_NCHITTEST with HTTRANSPARENT result)
   );
 
   { TDialogButton }

lcl/interfaces/carbon/carbonobject.inc

@@ -1421,6 +1421,7 @@ begin
     lcAntialiasingEnabledByDefault:
       Result := LCL_CAPABILITY_YES;
     lcAccessibilitySupport: Result := LCL_CAPABILITY_YES;
+    lcTransparentWindow: Result := LCL_CAPABILITY_YES;
   else
     Result := inherited;
   end;

lcl/interfaces/cocoa/cocoaobject.inc

@@ -280,6 +280,7 @@ begin
     {$endif}
     lcAntialiasingEnabledByDefault:
       Result := LCL_CAPABILITY_YES;
+    lcTransparentWindow: Result := LCL_CAPABILITY_YES;
   else
     Result := inherited;
   end;

lcl/interfaces/qt/qtobject.inc

@@ -1257,6 +1257,7 @@ begin
      {when issue #20475 is fixed, then set this to LCL_CAPABILITY_YES}
      lcReceivesLMClearCutCopyPasteReliably: Result := LCL_CAPABILITY_NO;
     lcRadialGradientBrush: Result := LCL_CAPABILITY_YES;
+    lcTransparentWindow: Result := LCL_CAPABILITY_YES;
   else
     Result := inherited GetLCLCapability(ACapability);
   end;

lcl/interfaces/win32/win32object.inc

@@ -563,6 +563,7 @@ begin
     lcLMHelpSupport: Result := LCL_CAPABILITY_YES;
     lcNeedMininimizeAppWithMainForm: Result := LCL_CAPABILITY_NO;
     lcSendsUTF8KeyPress: Result := LCL_CAPABILITY_YES;
+    lcTransparentWindow: Result := LCL_CAPABILITY_YES;
   else
     Result := inherited;
   end;