Add Window.width and Window.height attached properties

[ChangeLog][QtQuick] Added Window.width and Window.height attached
properties

Change-Id: I3ef590a0d3e6fa660ed88992d5ae843deb09c7bc
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

3 files changed, 33 insertions, 0 deletions

diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp
index aba36ce118..2c8b24baf6 100644
--- a/src/quick/items/qquickwindow.cpp
+++ b/src/quick/items/qquickwindow.cpp
@@ -3767,6 +3767,15 @@ void QQuickWindow::resetOpenGLState()
  */
 
 /*!
+    \qmlattachedproperty int Window::width
+    \qmlattachedproperty int Window::height
+    \since 5.5
+
+    These attached properties hold the size of the item's window.
+    The Window attached property can be attached to any Item.
+*/
+
+/*!
     \qmlproperty int Window::x
     \qmlproperty int Window::y
     \qmlproperty int Window::width
diff --git a/src/quick/items/qquickwindowattached.cpp b/src/quick/items/qquickwindowattached.cpp
index f74e903be3..70985bdd45 100644
--- a/src/quick/items/qquickwindowattached.cpp
+++ b/src/quick/items/qquickwindowattached.cpp
@@ -70,6 +70,16 @@ QQuickItem *QQuickWindowAttached::contentItem() const
     return (m_window ? m_window->contentItem() : Q_NULLPTR);
 }
 
+int QQuickWindowAttached::width() const
+{
+    return (m_window ? m_window->width() : 0);
+}
+
+int QQuickWindowAttached::height() const
+{
+    return (m_window ? m_window->height() : 0);
+}
+
 void QQuickWindowAttached::windowChanged(QQuickWindow *window)
 {
     if (window != m_window) {
@@ -89,6 +99,10 @@ void QQuickWindowAttached::windowChanged(QQuickWindow *window)
         if (!oldWindow || window->activeFocusItem() != oldWindow->activeFocusItem())
             emit activeFocusItemChanged();
         emit contentItemChanged();
+        if (!oldWindow || window->width() != oldWindow->width())
+            emit widthChanged();
+        if (!oldWindow || window->height() != oldWindow->height())
+            emit heightChanged();
 
         // QQuickWindowQmlImpl::visibilityChanged also exists, and window might even
         // be QQuickWindowQmlImpl, but that's not what we are connecting to.
@@ -102,6 +116,10 @@ void QQuickWindowAttached::windowChanged(QQuickWindow *window)
                 this, &QQuickWindowAttached::activeChanged);
         connect(window, &QQuickWindow::activeFocusItemChanged,
                 this, &QQuickWindowAttached::activeFocusItemChanged);
+        connect(window, &QQuickWindow::widthChanged,
+                this, &QQuickWindowAttached::widthChanged);
+        connect(window, &QQuickWindow::heightChanged,
+                this, &QQuickWindowAttached::heightChanged);
     }
 }
 
diff --git a/src/quick/items/qquickwindowattached_p.h b/src/quick/items/qquickwindowattached_p.h
index 7c2b0bc873..df1499c692 100644
--- a/src/quick/items/qquickwindowattached_p.h
+++ b/src/quick/items/qquickwindowattached_p.h
@@ -50,6 +50,8 @@ class Q_AUTOTEST_EXPORT QQuickWindowAttached : public QObject
     Q_PROPERTY(bool active READ isActive NOTIFY activeChanged)
     Q_PROPERTY(QQuickItem* activeFocusItem READ activeFocusItem NOTIFY activeFocusItemChanged)
     Q_PROPERTY(QQuickItem* contentItem READ contentItem NOTIFY contentItemChanged)
+    Q_PROPERTY(int width READ width NOTIFY widthChanged)
+    Q_PROPERTY(int height READ height NOTIFY heightChanged)
 
 public:
     QQuickWindowAttached(QObject* attachee);
@@ -58,6 +60,8 @@ public:
     bool isActive() const;
     QQuickItem* activeFocusItem() const;
     QQuickItem* contentItem() const;
+    int width() const;
+    int height() const;
 
 Q_SIGNALS:
 
@@ -65,6 +69,8 @@ Q_SIGNALS:
     void activeChanged();
     void activeFocusItemChanged();
     void contentItemChanged();
+    void widthChanged();
+    void heightChanged();
 
 protected Q_SLOTS:
     void windowChanged(QQuickWindow*);