Remove requirement to call QWindow::setMask after creating window

Like other QWindow properties we can just store it, and the platform
window should pick it up on creation like other properties.

[ChangeLog][QtGui][QWindow] setMask() no longer requires the window
to be created to have an effect; it can be set at any time.

Change-Id: I55b616363801b770bd61bda5325b443013b99866
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>

1 files changed, 18 insertions, 7 deletions

diff --git a/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp b/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
index 4cccf08086..2d32876a8d 100644
--- a/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
+++ b/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
@@ -1786,16 +1786,27 @@ void tst_QWindow::mask()
 {
     QRegion mask = QRect(10, 10, 800 - 20, 600 - 20);
 
-    QWindow window;
-    window.resize(800, 600);
-    window.setMask(mask);
+    {
+        QWindow window;
+        window.resize(800, 600);
+        QCOMPARE(window.mask(), QRegion());
 
-    QCOMPARE(window.mask(), QRegion());
+        window.create();
+        window.setMask(mask);
+        QCOMPARE(window.mask(), mask);
+    }
 
-    window.create();
-    window.setMask(mask);
+    {
+        QWindow window;
+        window.resize(800, 600);
+        QCOMPARE(window.mask(), QRegion());
+
+        window.setMask(mask);
+        QCOMPARE(window.mask(), mask);
+        window.create();
+        QCOMPARE(window.mask(), mask);
+    }
 
-    QCOMPARE(window.mask(), mask);
 }
 
 void tst_QWindow::initialSize()