Merge remote-tracking branch 'origin/5.7' into 5.8

Conflicts:
	examples/quick/quickwidgets/quickwidget/main.cpp
	src/qml/jsruntime/qv4jsonobject.cpp
	src/qml/jsruntime/qv4qobjectwrapper.cpp
	src/qml/jsruntime/qv4qobjectwrapper_p.h
	src/qml/qml/qqmlengine.cpp
	src/qml/qml/qqmlpropertycache.cpp
	src/qml/qml/qqmlpropertycache_p.h
	src/quick/items/qquickanimatedsprite.cpp
	src/quick/items/qquickitem.cpp
	src/quick/items/qquickitem.h
	src/quick/items/qquickitem_p.h
	src/quick/items/qquickview_p.h
	src/quick/scenegraph/qsgcontext.cpp
	src/quick/scenegraph/qsgdefaultrendercontext.cpp

Change-Id: I172c6fbff97208f21ed4c8b6db3d1747a889f22b

2 files changed, 28 insertions, 8 deletions

diff --git a/examples/quick/quickwidgets/quickwidget/main.cpp b/examples/quick/quickwidgets/quickwidget/main.cpp
index 2f73447a5d..6bb6722e02 100644
--- a/examples/quick/quickwidgets/quickwidget/main.cpp
+++ b/examples/quick/quickwidgets/quickwidget/main.cpp
@@ -39,6 +39,7 @@
 ****************************************************************************/
 
 #include <QQuickWidget>
+#include <QQuickItem>
 #include <QQmlError>
 #include <QtWidgets>
 #include "fbitem.h"
@@ -51,8 +52,9 @@ public:
 private slots:
     void quickWidgetStatusChanged(QQuickWidget::Status);
     void sceneGraphError(QQuickWindow::SceneGraphError error, const QString &message);
-    void grabToFile();
-    void renderToFile();
+    void grabFramebuffer();
+    void renderToPixmap();
+    void grabToImage();
     void createQuickWidgetsInTabs(QMdiArea *mdiArea);
 
 private:
@@ -93,8 +95,9 @@ MainWindow::MainWindow()
     setCentralWidget(centralWidget);
 
     QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
-    fileMenu->addAction(tr("Grab to image"), this, &MainWindow::grabToFile);
-    fileMenu->addAction(tr("Render to pixmap"), this, &MainWindow::renderToFile);
+    fileMenu->addAction(tr("Grab framebuffer"), this, &MainWindow::grabFramebuffer);
+    fileMenu->addAction(tr("Render to pixmap"), this, &MainWindow::renderToPixmap);
+    fileMenu->addAction(tr("Grab via grabToImage"), this, &MainWindow::grabToImage);
     fileMenu->addAction(tr("Quit"), qApp, &QCoreApplication::quit);
 
     QMenu *windowMenu = menuBar()->addMenu(tr("&Window"));
@@ -143,8 +146,7 @@ void MainWindow::sceneGraphError(QQuickWindow::SceneGraphError, const QString &m
 
 template<class T> void saveToFile(QWidget *parent, T *saveable)
 {
-    QString t;
-    QFileDialog fd(parent, t, QString());
+    QFileDialog fd(parent);
     fd.setAcceptMode(QFileDialog::AcceptSave);
     fd.setDefaultSuffix("png");
     fd.selectFile("test.png");
@@ -152,19 +154,31 @@ template<class T> void saveToFile(QWidget *parent, T *saveable)
         saveable->save(fd.selectedFiles().first());
 }
 
-void MainWindow::grabToFile()
+void MainWindow::grabFramebuffer()
 {
     QImage image = m_quickWidget->grabFramebuffer();
     saveToFile(this, &image);
 }
 
-void MainWindow::renderToFile()
+void MainWindow::renderToPixmap()
 {
     QPixmap pixmap(m_quickWidget->size());
     m_quickWidget->render(&pixmap);
     saveToFile(this, &pixmap);
 }
 
+void MainWindow::grabToImage()
+{
+    QFileDialog fd(this);
+    fd.setAcceptMode(QFileDialog::AcceptSave);
+    fd.setDefaultSuffix("png");
+    fd.selectFile("test_grabToImage.png");
+    if (fd.exec() == QDialog::Accepted) {
+        QMetaObject::invokeMethod(m_quickWidget->rootObject(), "performLayerBasedGrab",
+                                  Q_ARG(QVariant, fd.selectedFiles().first()));
+    }
+}
+
 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
diff --git a/examples/quick/quickwidgets/quickwidget/rotatingsquare.qml b/examples/quick/quickwidgets/quickwidget/rotatingsquare.qml
index 0c25eddf88..03b1114d20 100644
--- a/examples/quick/quickwidgets/quickwidget/rotatingsquare.qml
+++ b/examples/quick/quickwidgets/quickwidget/rotatingsquare.qml
@@ -57,4 +57,10 @@ Rectangle {
         anchors.centerIn: parent
         text: "Qt Quick running in a widget"
     }
+
+    function performLayerBasedGrab(fn) {
+        root.grabToImage(function(result) {
+            result.saveToFile(fn);
+        });
+    }
 }