macOS: Remove dead updateRequest code based on setNeedsDisplay

We're no longer using this code path for QWindow::requestUpdate()

Change-Id: I000304a4f1a6ea2c3a4e8268ae978dedd968e07c
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

src/plugins/platforms/cocoa/qnsview.h

@@ -65,7 +65,6 @@ Q_FORWARD_DECLARE_OBJC_CLASS(QT_MANGLE_NAMESPACE(QCocoaNSMenuItem));
 @end
 
 @interface QT_MANGLE_NAMESPACE(QNSView) (DrawingAPI)
-- (void)requestUpdate;
 #ifndef QT_NO_OPENGL
 - (void)setQCocoaGLContext:(QCocoaGLContext *)context;
 #endif

src/plugins/platforms/cocoa/qnsview.mm

@@ -133,7 +133,6 @@
     bool m_updatingDrag;
     NSEvent *m_currentlyInterpretedKeyEvent;
     QSet<quint32> m_acceptedKeyDowns;
-    bool m_updateRequested;
 }
 
 - (instancetype)initWithCocoaWindow:(QCocoaWindow *)platformWindow
@@ -155,7 +154,6 @@
         m_scrolling = false;
         m_updatingDrag = false;
         m_currentlyInterpretedKeyEvent = nil;
-        m_updateRequested = false;
         m_dontOverrideCtrlLMB = qt_mac_resolveOption(false, platformWindow->window(),
             "_q_platform_MacDontOverrideCtrlLMB", "QT_MAC_DONT_OVERRIDE_CTRL_LMB");
         m_trackingArea = nil;

src/plugins/platforms/cocoa/qnsview_drawing.mm

@@ -41,19 +41,6 @@
 
 @implementation QT_MANGLE_NAMESPACE(QNSView) (DrawingAPI)
 
-- (void)requestUpdate
-{
-    if (self.needsDisplay) {
-        // If the view already has needsDisplay set it means that there may be code waiting for
-        // a real expose event, so we can't issue setNeedsDisplay now as a way to trigger an
-        // update request. We will re-trigger requestUpdate from drawRect.
-        return;
-    }
-
-    [self setNeedsDisplay:YES];
-    m_updateRequested = true;
-}
-
 #ifndef QT_NO_OPENGL
 - (void)setQCocoaGLContext:(QCocoaGLContext *)context
 {
@@ -82,12 +69,6 @@
     return YES;
 }
 
-- (void)setNeedsDisplayInRect:(NSRect)rect
-{
-    [super setNeedsDisplayInRect:rect];
-    m_updateRequested = false;
-}
-
 - (void)drawRect:(NSRect)dirtyRect
 {
     Q_UNUSED(dirtyRect);
@@ -115,22 +96,7 @@
     }
 #endif
 
-    if (m_updateRequested) {
-        Q_ASSERT(m_platformWindow->hasPendingUpdateRequest());
-        m_platformWindow->deliverUpdateRequest();
-        m_updateRequested = false;
-    } else {
-        m_platformWindow->handleExposeEvent(dirtyRegion);
-    }
-
-    if (m_updateRequested && m_platformWindow->hasPendingUpdateRequest()) {
-        // A call to QWindow::requestUpdate was issued during event delivery above,
-        // but AppKit will reset the needsDisplay state of the view after completing
-        // the current display cycle, so we need to defer the request to redisplay.
-        // FIXME: Perhaps this should be a trigger to enable CADisplayLink?
-        qCDebug(lcQpaDrawing) << "[QNSView drawRect:] issuing deferred setNeedsDisplay due to pending update request";
-        dispatch_async(dispatch_get_main_queue (), ^{ [self requestUpdate]; });
-    }
+    m_platformWindow->handleExposeEvent(dirtyRegion);
 }
 
 - (BOOL)shouldUseMetalLayer