paweld/lazarus
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/lazarus/lazarus.git synced 2025-08-13 05:29:51 +02:00
Code Issues Packages Projects Releases Wiki Activity

* fixes tab control left arrow drawing for Leopard (and higher?)

Browse Source 
git-svn-id: trunk@19567 -
This commit is contained in:
dmitry 2009-04-22 07:08:03 +00:00
parent 2e18113fd7
commit 02ba3921d6
1 changed files with 55 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
lcl/interfaces/carbon/carbontabs.pp
View File

@ -250,6 +250,50 @@ end;
const
ArrowSize = 16;
{------------------------------------------------------------------------------
Name: CarbonTabsPrevArrow_Reverse
Reverses carbon arrow CGContext, so the right pointing arrow reversed to left
It's required in Leopard only, there left arrow is suppressed by Apple.
------------------------------------------------------------------------------}
function CarbonTabsPrevArrow_Reverse(ANextHandler: EventHandlerCallRef;
AEvent: EventRef;
AWidget: TCarbonWidget): OSStatus; {$IFDEF darwin}mwpascal;{$ENDIF}
var
Context : CGContextRef;
layer : CGLayerRef;
lCtx : CGContextRef;
sz : CGSize;
pnt : CGPoint;
w : LongWord;
begin
{$IFDEF VerboseControlEvent}
DebugLn('CarbonTabsPrevArrow_Reverse: ', DbgSName(AWidget.LCLObject));
{$ENDIF}
Result := GetEventParameter(AEvent, kEventParamCGContextRef, typeCGContextRef, nil, sizeof(Context), nil, @Context );
if Result <> 0 then begin
CallNextEventHandler(ANextHandler, AEvent);
Exit;
end;
sz.height := ArrowSize; sz.width := ArrowSize;
layer := CGLayerCreateWithContext(Context, sz, nil);
try
lCtx := CGLayerGetContext(layer);
SetEventParameter(AEvent, kEventParamCGContextRef, typeCGContextRef, sizeof(lCtx), @lCtx);
Result := CallNextEventHandler(ANextHandler, AEvent);
w := ArrowSize;
pnt.x := w-0-ArrowSize; pnt.y := 1;
CGContextTranslateCTM(Context, w, 0);
CGContextScaleCTM(Context, -1, 1);
CGContextDrawLayerAtPoint(Context, pnt, layer);
finally
CGLayerRelease(layer);
end;
end;
{------------------------------------------------------------------------------
Method: TCarbonTabsControl.GetPrevArrowBounds
Returns: Bounds of prev arrow
@ -302,6 +346,8 @@ var
TabEntry: ControlTabEntry;
R: TRect;
TmpSpec: EventTypeSpec;
Err: OSStatus;
Ver: SInt32;
begin
case (LCLObject as TCustomNotebook).TabPosition of
tpTop: Direction := kControlTabDirectionNorth;
@ -357,7 +403,15 @@ begin
InstallControlEventHandler(FNextArrow,
RegisterEventHandler(@CarbonTabsNextArrow_Track),
1, @TmpSpec, Pointer(Self), nil);
Err:=Gestalt(gestaltSystemVersion, Ver);
if (Err <> 0) or (Ver >= $1040) then begin
TmpSpec := MakeEventSpec(kEventClassControl, kEventControlDraw);
InstallControlEventHandler(FPrevArrow,
RegisterEventHandler(@CarbonTabsPrevArrow_Reverse),
1, @TmpSpec, Pointer(Self), nil);
end;
FFirstIndex := 0;
FLastIndex := 0;
FTabIndex := -1;