Maximizing a window makes it a bit smaller that the minimum size:Cocoa

When returning preferred sizes for the frame, we should consider the
size for non client area elements like frame, tittlebar etc.

Task-number: 6090
Reviewed-by: Denis

1 files changed, 7 insertions, 2 deletions

diff --git a/src/gui/kernel/qcocoawindowdelegate_mac.mm b/src/gui/kernel/qcocoawindowdelegate_mac.mm
index 9fb674e0cf..8a22a65aae 100644
--- a/src/gui/kernel/qcocoawindowdelegate_mac.mm
+++ b/src/gui/kernel/qcocoawindowdelegate_mac.mm
@@ -324,8 +324,13 @@ static void cleanupCocoaWindowDelegate()
     NSRect frameToReturn = defaultFrame;
     QWidget *qwidget = m_windowHash->value(window);
     QSizeF size = qwidget->maximumSize();
-    frameToReturn.size.width = qMin<CGFloat>(frameToReturn.size.width, size.width());
-    frameToReturn.size.height = qMin<CGFloat>(frameToReturn.size.height, size.height());
+    NSRect windowFrameRect = [window frame];
+    NSRect viewFrameRect = [[window contentView] frame];
+    // consider additional size required for titlebar & frame
+    frameToReturn.size.width = qMin<CGFloat>(frameToReturn.size.width,
+            size.width()+(windowFrameRect.size.width - viewFrameRect.size.width));
+    frameToReturn.size.height = qMin<CGFloat>(frameToReturn.size.height,
+            size.height()+(windowFrameRect.size.height - viewFrameRect.size.height));
     return frameToReturn;
 }