Say hello to QQuickItem::grabToImage().

[ChangeLog][QtQuick][Item] Added functions QQuickItem::grabToImage()
and Item::grabToImage() to allow grabbing of items into
system-memory images.

Change-Id: I76cd73bb62f7440569c6fce63d63528559845721
Reviewed-by: Michael Brasser <michael.brasser@live.com>

2 files changed, 97 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickitem2/data/grabToImage.qml b/tests/auto/quick/qquickitem2/data/grabToImage.qml
new file mode 100644
index 0000000000..9f25210ee2
--- /dev/null
+++ b/tests/auto/quick/qquickitem2/data/grabToImage.qml
@@ -0,0 +1,60 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Jolla Ltd, author: <gunnar.sletta@jollamobile.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+
+Item {
+    width: 320
+    height: 480
+    Rectangle {
+        objectName: "myItem";
+        width: 100
+        height: 100
+        color: "red"
+        Rectangle {
+            anchors.right: parent.right
+            anchors.bottom: parent.bottom
+            width: 10
+            height: 10
+            color: "blue"
+        }
+    }
+}
diff --git a/tests/auto/quick/qquickitem2/tst_qquickitem.cpp b/tests/auto/quick/qquickitem2/tst_qquickitem.cpp
index 3ce18488df..2de7fa1a83 100644
--- a/tests/auto/quick/qquickitem2/tst_qquickitem.cpp
+++ b/tests/auto/quick/qquickitem2/tst_qquickitem.cpp
@@ -117,6 +117,8 @@ private slots:
     void contains();
     void childAt();
 
+    void grab();
+
 private:
     QQmlEngine engine;
     bool qt_tab_all_widgets() {
@@ -2528,6 +2530,41 @@ void tst_QQuickItem::childAt()
     QCOMPARE(parent.childAt(300, 300), static_cast<QQuickItem *>(0));
 }
 
+void tst_QQuickItem::grab()
+{
+    QQuickView view;
+    view.setSource(testFileUrl("grabToImage.qml"));
+    view.show();
+    QTest::qWaitForWindowExposed(&view);
+
+    QQuickItem *root = qobject_cast<QQuickItem *>(view.rootObject());
+    QVERIFY(root);
+    QQuickItem *item = root->findChild<QQuickItem *>("myItem");
+    QVERIFY(item);
+
+    { // Default size (item is 100x100)
+        QSharedPointer<QQuickItemGrabResult> result = item->grabToImage();
+        QSignalSpy spy(result.data(), SIGNAL(ready()));
+        QTRY_VERIFY(spy.size() > 0);
+        QVERIFY(!result->url().isEmpty());
+        QImage image = result->image();
+        QCOMPARE(image.pixel(0, 0), qRgb(255, 0, 0));
+        QCOMPARE(image.pixel(99, 99), qRgb(0, 0, 255));
+    }
+
+    { // Smaller size
+        QSharedPointer<QQuickItemGrabResult> result = item->grabToImage(QSize(50, 50));
+        QVERIFY(!result.isNull());
+        QSignalSpy spy(result.data(), SIGNAL(ready()));
+        QTRY_VERIFY(spy.size() > 0);
+        QVERIFY(!result->url().isEmpty());
+        QImage image = result->image();
+        QCOMPARE(image.pixel(0, 0), qRgb(255, 0, 0));
+        QCOMPARE(image.pixel(49, 49), qRgb(0, 0, 255));
+    }
+
+}
+
 
 QTEST_MAIN(tst_QQuickItem)