diff options
| -rw-r--r-- | macosx/tkMacOSXDraw.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/macosx/tkMacOSXDraw.c b/macosx/tkMacOSXDraw.c index bbb9b23..402d154 100644 --- a/macosx/tkMacOSXDraw.c +++ b/macosx/tkMacOSXDraw.c @@ -1143,7 +1143,7 @@ TkScrollWindow( MacDrawable *macDraw = (MacDrawable *)drawable; TKContentView *view = (TKContentView *)TkMacOSXGetNSViewForDrawable(macDraw); CGRect srcRect, dstRect; - HIShapeRef dmgRgn = NULL, extraRgn = NULL; + HIShapeRef dmgRgn = NULL, extraRgn = NULL, unionRgn = NULL, intersectRgn = NULL; NSRect bounds, visRect, scrollSrc, scrollDst; int result = 0; @@ -1182,7 +1182,11 @@ TkScrollWindow( dmgRgn = HIShapeCreateMutableWithRect(&srcRect); extraRgn = HIShapeCreateWithRect(&dstRect); ChkErr(HIShapeUnion, dmgRgn, extraRgn, - (HIMutableShapeRef) dmgRgn); + (HIMutableShapeRef) unionRgn); + ChkErr(HIShapeIntersect, dmgRgn, extraRgn, + (HIMutableShapeRef) intersectRgn); + ChkErr(HIShapeDifference, unionRgn, intersectRgn, + (HIMutableShapeRef) dmgRgn); result = HIShapeIsEmpty(dmgRgn) ? 0 : 1; /* |