1 files changed, 22 insertions, 16 deletions

diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index e2fa614..3b80463 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -3332,7 +3332,21 @@ void QWidgetPrivate::update_sys(const QRegion &rgn)
         HIViewSetNeedsDisplay(qt_mac_nativeview_for(q), true); // do a complete repaint on overflow.
     }
 #else
-    qt_mac_set_needs_display(q, rgn);
+    // Cocoa doesn't do regions, it seems more efficient to just update the bounding rect instead of a potential number of message passes for each rect.
+    const QRect & boundingRect = rgn.boundingRect();
+
+    // Alien support: get the first native ancestor widget (will be q itself in the non-alien case),
+    // map the coordinates from q space to NSView space and invalidate the rect.
+    QWidget *nativeParent = q->internalWinId() ? q : q->nativeParentWidget();
+    if (nativeParent == 0)
+	return;
+    const QRect nativeBoundingRect = QRect(
+	    QPoint(q->mapTo(nativeParent, boundingRect.topLeft())),
+	    QSize(boundingRect.size()));
+
+    [qt_mac_nativeview_for(nativeParent) setNeedsDisplayInRect:NSMakeRect(nativeBoundingRect.x(),
+	    nativeBoundingRect.y(), nativeBoundingRect.width(),
+	    nativeBoundingRect.height())];
 #endif
 }
 
@@ -4011,17 +4025,10 @@ static void qt_mac_update_widget_posisiton(QWidget *q, QRect oldRect, QRect newR
     const HIRect horizontalSlice = CGRectMake(0, starty, startx, stopy);
     HIViewSetNeedsDisplayInRect(view, &horizontalSlice, true);
 #else
-    const bool isResize = (oldRect.size() != newRect.size());
-
-    qDebug() << "update widget";
-    // Perform a normal (complete repaint) update in some cases:
-    if (isResize && q->testAttribute(Qt::WA_StaticContents) == false) {
-	NSRect bounds = NSMakeRect(newRect.x(), newRect.y(),
-		newRect.width(), newRect.height());
-	[qt_mac_nativeview_for(q) setFrame:bounds];
-	return;
-    }
-
+    Q_UNUSED(oldRect);
+    NSRect bounds = NSMakeRect(newRect.x(), newRect.y(),
+	    newRect.width(), newRect.height());
+    [qt_mac_nativeview_for(q) setFrame:bounds];
 #endif
 }
 
@@ -4569,15 +4576,14 @@ void QWidgetPrivate::scroll_sys(int dx, int dy, const QRect &r)
 	const QRect rect = *it;
 	const NSRect dirtyRect = NSMakeRect(rect.x() + dx, rect.y() + dy,
 		rect.width(), rect.height());
-	//[view setNeedsDisplayInRect:dirtyRect];
+	[view setNeedsDisplayInRect:dirtyRect];
 	++it;
     }
 
     NSSize deltaSize = NSMakeSize(dx, dy);
-    //[view translateRectsNeedingDisplayInRect:scrollRect by:deltaSize];
     [view scrollRect:scrollRect by:deltaSize];
-    //[view setNeedsDisplayInRect:deltaXRect];
-    //[view setNeedsDisplayInRect:deltaYRect];
+    [view setNeedsDisplayInRect:deltaXRect];
+    [view setNeedsDisplayInRect:deltaYRect];
 #endif // QT_MAC_USE_COCOA
 }