fix for win32RichMemo background color as suggested by Dusan.

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@919 8e941d3f-bd1b-0410-a28a-d453659cc2b4

components/richmemo/richmemo.pas

@@ -211,9 +211,10 @@ end;
 function TCustomRichMemo.GetStyleRange(CharOfs: Integer; var RangeStart,
   RangeLen: Integer): Boolean;
 begin
-  if HandleAllocated then
-    Result := TWSCustomRichMemoClass(WidgetSetClass).GetStyleRange(Self, CharOfs, RangeStart, RangeLen)
-  else begin
+  if HandleAllocated then begin
+    Result := TWSCustomRichMemoClass(WidgetSetClass).GetStyleRange(Self, CharOfs, RangeStart, RangeLen);
+    if Result and (RangeLen = 0) then RangeLen := 1;
+  end else begin
     RangeStart := -1;
     RangeLen := -1;
     Result := false;

components/richmemo/win32/win32richmemo.pas

@@ -42,6 +42,8 @@ type
 
   TWin32WSCustomRichMemo = class(TWSCustomRichMemo)
   published
+    class procedure SetColor(const AWinControl: TWinControl); override;
+  
     class procedure SetSelStart(const ACustomEdit: TCustomEdit; NewStart: integer); override;
     class procedure SetSelLength(const ACustomEdit: TCustomEdit; NewLength: integer); override;
 
@@ -92,6 +94,13 @@ end;
 
 { TWin32WSCustomRichMemo }
 
+class procedure TWin32WSCustomRichMemo.SetColor(const AWinControl: TWinControl);  
+begin
+  // this methos is implemented, because Win32RichMemo doesn't use 
+  // default LCL WM_PAINT message!
+  SendMessage(AWinControl.Handle, EM_SETBKGNDCOLOR, 0, AWinControl.Color);
+end;
+
 class procedure TWin32WSCustomRichMemo.SetSelStart(const ACustomEdit: TCustomEdit; NewStart: integer);  
 var
   range : Tcharrange;
@@ -151,8 +160,10 @@ begin
       Flags := Flags and not WS_HSCROLL
     else
       Flags := Flags or ES_AUTOHSCROLL;
+      
     if ACustomMemo.BorderStyle=bsSingle then
       FlagsEx := FlagsEx or WS_EX_CLIENTEDGE;
+      
     pClassName := @RichClass[1];
     WindowTitle := StrCaption;
   end;
@@ -185,19 +196,23 @@ begin
     RichEditManager.SetSelectedTextStyle(AWinControl.Handle, Params);
 end;
 
-class function TWin32WSCustomRichMemo.GetTextAttributes(
-  const AWinControl: TWinControl; TextStart: Integer; var Params: TIntFontParams
-  ): Boolean;  
+class function TWin32WSCustomRichMemo.GetTextAttributes(const AWinControl: TWinControl; 
+  TextStart: Integer; var Params: TIntFontParams): Boolean;  
 var
   OrigStart : Integer;
   OrigLen   : Integer;
   NeedLock  : Boolean;  
+  eventmask : LongWord;
 begin
+  writeln('[GetTextAttributes] begin');
   if not Assigned(RichEditManager) or not Assigned(AWinControl) then begin
     Result := false;
     Exit;
   end;
   
+  eventmask := SendMessage(AWinControl.Handle, EM_GETEVENTMASK, 0, 0);
+  SendMessage(AWinControl.Handle, EM_SETEVENTMASK, 0, 0);
+  
   RichEditManager.GetSelection(AWinControl.Handle, OrigStart, OrigLen);
   
   NeedLock := (OrigStart <> TextStart);
@@ -207,8 +222,14 @@ begin
     Result := RichEditManager.GetSelectedTextStyle(AWinControl.Handle, Params );
     RichEditManager.SetSelection(AWinControl.Handle, OrigStart, OrigLen);
     UnlockRedraw(AWinControl.Handle);
-  end else 
+  end else begin
+    LockRedraw(AWinControl.Handle);
     Result := RichEditManager.GetSelectedTextStyle(AWinControl.Handle, Params);
+    UnlockRedraw(AWinControl.Handle);
+  end;
+    
+  SendMessage(AWinControl.Handle, EM_SETEVENTMASK, 0, eventmask);
+  writeln('[GetTextAttributes] end');
 end;
 
 
@@ -236,12 +257,16 @@ var
   vInfo     : TScrollInfo;
   hVisible  : Boolean;
   vVisible  : Boolean;
+  eventmask : longword;
 begin
   if not Assigned(RichEditManager) or not Assigned(AWinControl) then begin
     Result := false;
     Exit;
   end;
   
+  eventmask := SendMessage(AWinControl.Handle, EM_GETEVENTMASK, 0, 0);
+  SendMessage(AWinControl.Handle, EM_SETEVENTMASK, 0, 0);
+  
   RichEditManager.GetSelection(AWinControl.Handle, OrigStart, OrigLen);
   LockRedraw(AWinControl.Handle);
   InitScrollInfo(hInfo);
@@ -261,6 +286,8 @@ begin
   if vVisible then SetScrollInfo(AWinControl.Handle, SB_Vert, vInfo, false);
   RichEditManager.SetSelection(AWinControl.Handle, OrigStart, OrigLen);
   UnlockRedraw(AWinControl.Handle, false);
+  
+  SendMessage(AWinControl.Handle, EM_SETEVENTMASK, 0, eventmask);
 end;
 
 class function TWin32WSCustomRichMemo.LoadRichText(

components/richmemo/win32/win32richmemoproc.pas

@@ -48,7 +48,6 @@ type
     class procedure SetHideSelection(RichEditWnd: Handle; AValue: Boolean); virtual;
     class function LoadRichText(RichEditWnd: Handle; ASrc: TStream): Boolean; virtual;
     class function SaveRichText(RichEditWnd: Handle; ADst: TStream): Boolean; virtual;
-    
   end;
   TRichManagerClass = class of TRichEditManager;
                      
@@ -78,12 +77,13 @@ function InitRichEdit: Boolean;
 begin
   if GlobalRichClass = '' then begin
     if LoadLibrary('Msftedit.dll') <> 0 then begin 
-      GlobalRichClass := 'RichEdit50W'
+      GlobalRichClass := 'RichEdit50W';
     end else if LoadLibrary('RICHED20.DLL') <> 0 then begin
       if UnicodeEnabledOS then GlobalRichClass := 'RichEdit20W'
       else GlobalRichClass := 'RichEdit20A'
-    end else if LoadLibrary('RICHED32.DLL') <> 0 then
+    end else if LoadLibrary('RICHED32.DLL') <> 0 then begin
       GlobalRichClass := 'RichEdit';
+    end;
       
     if not Assigned(RichEditManager) then 
       RichEditManager := TRichEditManager;
@@ -208,7 +208,7 @@ begin
   Result := false;
   if RichEditWnd = 0 then Exit;
   
-  textlen.flags := GTL_DEFAULT or GTL_NUMCHARS;
+  textlen.flags := GTL_NUMCHARS or GTL_USECRLF or GTL_PRECISE;
   textlen.codepage := CP_UNICODE;
   len := SendMessage(RichEditWnd, EM_GETTEXTLENGTHEX, WPARAM(@textlen), 0);