Add imageSource property to attached Drag property

This property holds a URL which is loaded into a QPixmap via
QQuickPixmap, and subsequently set on the QDrag object.

This is especially important for drag and drop to external applications,
where of course a QQuickItem cannot be dragged; however, combined with
QQuickItem::grabToImage(), this change allows setting a QQuickItem's
contents as the drag pixmap.

[ChangeLog][QtQuick][Drag] Added imageSource property to attached Drag
object: this allows drag sources to specify the pixmap to be drawn next
to the mouse cursor when starting a drag and drop operation.

Task-number: QTBUG-37366
Change-Id: Ibcf1d888c525e50976a116ec743ce6fca4c31525
Reviewed-by: Michael Brasser <michael.brasser@live.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/quick/items/qquickdrag_p.h b/src/quick/items/qquickdrag_p.h
index c1695e49f0..17721251d9 100644
--- a/src/quick/items/qquickdrag_p.h
+++ b/src/quick/items/qquickdrag_p.h
@@ -58,6 +58,7 @@
 
 #include <QtCore/qmimedata.h>
 #include <QtCore/qstringlist.h>
+#include <QtCore/qurl.h>
 
 #ifndef QT_NO_DRAGANDDROP
 
@@ -247,6 +248,7 @@ class QQuickDragAttached : public QObject
     Q_PROPERTY(QObject *source READ source WRITE setSource NOTIFY sourceChanged RESET resetSource)
     Q_PROPERTY(QObject *target READ target NOTIFY targetChanged)
     Q_PROPERTY(QPointF hotSpot READ hotSpot WRITE setHotSpot NOTIFY hotSpotChanged)
+    Q_PROPERTY(QUrl imageSource READ imageSource WRITE setImageSource NOTIFY imageSourceChanged REVISION 8)
     Q_PROPERTY(QStringList keys READ keys WRITE setKeys NOTIFY keysChanged)
     Q_PROPERTY(QVariantMap mimeData READ mimeData WRITE setMimeData NOTIFY mimeDataChanged)
     Q_PROPERTY(Qt::DropActions supportedActions READ supportedActions WRITE setSupportedActions NOTIFY supportedActionsChanged)
@@ -268,6 +270,9 @@ public:
     QPointF hotSpot() const;
     void setHotSpot(const QPointF &hotSpot);
 
+    QUrl imageSource() const;
+    void setImageSource(const QUrl &url);
+
     QStringList keys() const;
     void setKeys(const QStringList &keys);
 
@@ -300,6 +305,7 @@ Q_SIGNALS:
     void sourceChanged();
     void targetChanged();
     void hotSpotChanged();
+    void imageSourceChanged();
     void keysChanged();
     void mimeDataChanged();
     void supportedActionsChanged();