From 60ed6a433a1d51d5ca7ccdeff3fce55e2350d20c Mon Sep 17 00:00:00 2001
From: Shawn Rutledge <shawn.rutledge@digia.com>
Date: Thu, 7 Aug 2014 13:57:50 +0200
Subject: Add Window attached property on Item

An Item sometimes needs to know a few things about the window
in which it is being displayed; this attached property can expose
them without needing to go up the heirarchy to find the window.
Instead of adding the QQuickWindow pointer as a property on Item
as in 8f49f50a169db85401eb37daf4fe3a0fc3280603, having an attached
property means that it will not be found by introspection; and
it solves the problem that Window is in the QtQuick.Window module:
you must import the module to use the attached property, instead
of having access to a pointer whose type might not be defined
if you didn't import it.  The Window attached property is created
on-demand (so the memory cost adds up if you use it in too many
places); the tradeoff is that it can exist even when the item
is not yet being shown in a window, so bindings at startup work.
The API is purposely incomplete compared to that in QQuickWindow
so that we can introduce what is needed in a controlled fasion
over time.  For now we know of use cases for visibility, active
and activeFocusItem.

[ChangeLog][QtQuick][Window] Added Item.Window attached property

Change-Id: I649404cbd1383326678aa2144f790b2f2542dbbc
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
---
 .../quick/qquickwindow/data/windowattached.qml     | 25 ++++++++++++++++++++++
 tests/auto/quick/qquickwindow/tst_qquickwindow.cpp | 21 ++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 tests/auto/quick/qquickwindow/data/windowattached.qml

(limited to 'tests/auto/quick/qquickwindow')

diff --git a/tests/auto/quick/qquickwindow/data/windowattached.qml b/tests/auto/quick/qquickwindow/data/windowattached.qml
new file mode 100644
index 0000000000..e000d5c6fd
--- /dev/null
+++ b/tests/auto/quick/qquickwindow/data/windowattached.qml
@@ -0,0 +1,25 @@
+import QtQuick 2.4
+import QtQuick.Window 2.2
+
+Rectangle {
+    id: root
+    width: 100
+    height: 100
+    property bool windowActive: root.Window.active
+    Text {
+        objectName: "rectangleWindowText"
+        anchors.centerIn: parent
+        text: (windowActive ? "active" : "inactive") + "\nvisibility: " + root.Window.visibility
+    }
+
+    property Window extraWindow: Window {
+        objectName: "extraWindow"
+        title: "extra window"
+        visible: true
+        Text {
+            objectName: "extraWindowText"
+            anchors.centerIn: parent
+            text: (extraWindow.active ? "active" : "inactive") + "\nvisibility: " + Window.visibility
+        }
+    }
+}
diff --git a/tests/auto/quick/qquickwindow/tst_qquickwindow.cpp b/tests/auto/quick/qquickwindow/tst_qquickwindow.cpp
index 7b23d144a9..b8e36b06fb 100644
--- a/tests/auto/quick/qquickwindow/tst_qquickwindow.cpp
+++ b/tests/auto/quick/qquickwindow/tst_qquickwindow.cpp
@@ -43,6 +43,7 @@
 #include <QDebug>
 #include <QTouchEvent>
 #include <QtQuick/QQuickItem>
+#include <QtQuick/QQuickView>
 #include <QtQuick/QQuickWindow>
 #include <QtQml/QQmlEngine>
 #include <QtQml/QQmlComponent>
@@ -368,6 +369,8 @@ private slots:
     void defaultSurfaceFormat();
     void glslVersion();
 
+    void attachedProperty();
+
     void testRenderJob();
 
 private:
@@ -1974,6 +1977,24 @@ void tst_qquickwindow::glslVersion()
     }
 }
 
+void tst_qquickwindow::attachedProperty()
+{
+    QQuickView view(testFileUrl("windowattached.qml"));
+    view.show();
+    view.requestActivate();
+    QVERIFY(QTest::qWaitForWindowActive(&view));
+    QVERIFY(view.rootObject()->property("windowActive").toBool());
+
+    QQuickWindow *innerWindow = view.rootObject()->findChild<QQuickWindow*>("extraWindow");
+    QVERIFY(innerWindow);
+    innerWindow->requestActivate();
+    QVERIFY(QTest::qWaitForWindowActive(innerWindow));
+
+    QQuickText *text = view.rootObject()->findChild<QQuickText*>("extraWindowText");
+    QVERIFY(text);
+    QCOMPARE(text->text(), QLatin1String("active\nvisibility: 2"));
+}
+
 class RenderJob : public QRunnable
 {
 public:
-- 
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