Call documented API.

We were using the older CGSSetWindowAlpha function, which really is not
well advertised. Instead, Apple eventually added SetWindowAlpha, but we
neglected to update. May as well do that now skip the wrath of a change
in the private API.

Task-number: 244629

1 files changed, 2 insertions, 11 deletions

diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index 7a586e1..cd11b52 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -4450,14 +4450,6 @@ void QWidgetPrivate::setMask_sys(const QRegion &region)
 #endif
 }
 
-extern "C" {
-    typedef struct CGSConnection *CGSConnectionRef;
-    typedef struct CGSWindow *CGSWindowRef;
-    extern OSStatus CGSSetWindowAlpha(CGSConnectionRef, CGSWindowRef, float);
-    extern CGSWindowRef GetNativeWindowFromWindowRef(WindowRef);
-    extern CGSConnectionRef _CGSDefaultConnection();
-}
-
 void QWidgetPrivate::setWindowOpacity_sys(qreal level)
 {
     Q_Q(QWidget);
@@ -4470,12 +4462,11 @@ void QWidgetPrivate::setWindowOpacity_sys(qreal level)
     if (!q->testAttribute(Qt::WA_WState_Created))
         return;
 
-#if QT_MAC_USE_COCOA
     OSWindowRef oswindow = qt_mac_window_for(q);
+#if QT_MAC_USE_COCOA
     [oswindow setAlphaValue:level];
 #else
-    CGSSetWindowAlpha(_CGSDefaultConnection(),
-                      GetNativeWindowFromWindowRef(qt_mac_window_for(q)), level);
+    SetWindowAlpha(oswindow, level);
 #endif
 }