Add support for external drag and drop in Quick items.

Add dragType enums with values of None, Automatic, Internal (default).
Setting to Automatic allows startDrag to be called automatically.
Setting to Internal (default) retains old behavior.

Add mimeData to Drag item to enable external drags.

Call startDrag to start drag manually or change from internal drag to
external drag. Added events dragStarted and dragFinished that get
invoked from startDrag.

Mime data must be specified in the mimeData property as
mime-type / data pairs.

Moved QQuickDrag from qquickmousearea* files to qquickdrag* files to
reduce header interdependencies that caused linking errors in other
modules and also to improve code organization.

Allow DropArea to receive and process external data.

Introduced new variable containsDrag to QQuickDropAreaPrivate. This
replaces mimeData which was previously being used to determine if a
drop operation was currently occurring. The problem was that mimeData
was being externally destructed.

Also introduced accessor methods for getting color, html, image, text,
and urls out of the drop. This facilitates dropping of external data of
those types onto a DropArea.

Added example quick/externaldraganddrop.

Task-number: QTBUG-27498
Change-Id: I1420df7c161ea3399e49a23305273e106baa246f
Reviewed-by: Alan Alpert (Personal) <416365416c@gmail.com>

1 files changed, 1 insertions, 76 deletions

diff --git a/src/quick/items/qquickmousearea_p.h b/src/quick/items/qquickmousearea_p.h
index fa32f32b65..ffe75ad843 100644
--- a/src/quick/items/qquickmousearea_p.h
+++ b/src/quick/items/qquickmousearea_p.h
@@ -49,78 +49,7 @@
 QT_BEGIN_NAMESPACE
 
 class QQuickMouseEvent;
-
-#ifndef QT_NO_DRAGANDDROP
-
-class QQuickDragAttached;
-class Q_AUTOTEST_EXPORT QQuickDrag : public QObject
-{
-    Q_OBJECT
-
-    Q_ENUMS(Axis)
-    Q_PROPERTY(QQuickItem *target READ target WRITE setTarget NOTIFY targetChanged RESET resetTarget)
-    Q_PROPERTY(Axis axis READ axis WRITE setAxis NOTIFY axisChanged)
-    Q_PROPERTY(qreal minimumX READ xmin WRITE setXmin NOTIFY minimumXChanged)
-    Q_PROPERTY(qreal maximumX READ xmax WRITE setXmax NOTIFY maximumXChanged)
-    Q_PROPERTY(qreal minimumY READ ymin WRITE setYmin NOTIFY minimumYChanged)
-    Q_PROPERTY(qreal maximumY READ ymax WRITE setYmax NOTIFY maximumYChanged)
-    Q_PROPERTY(bool active READ active NOTIFY activeChanged)
-    Q_PROPERTY(bool filterChildren READ filterChildren WRITE setFilterChildren NOTIFY filterChildrenChanged)
-    //### consider drag and drop
-
-public:
-    QQuickDrag(QObject *parent=0);
-    ~QQuickDrag();
-
-    QQuickItem *target() const;
-    void setTarget(QQuickItem *target);
-    void resetTarget();
-
-    enum Axis { XAxis=0x01, YAxis=0x02, XAndYAxis=0x03, XandYAxis=XAndYAxis };
-    Axis axis() const;
-    void setAxis(Axis);
-
-    qreal xmin() const;
-    void setXmin(qreal);
-    qreal xmax() const;
-    void setXmax(qreal);
-    qreal ymin() const;
-    void setYmin(qreal);
-    qreal ymax() const;
-    void setYmax(qreal);
-
-    bool active() const;
-    void setActive(bool);
-
-    bool filterChildren() const;
-    void setFilterChildren(bool);
-
-    static QQuickDragAttached *qmlAttachedProperties(QObject *obj);
-
-Q_SIGNALS:
-    void targetChanged();
-    void axisChanged();
-    void minimumXChanged();
-    void maximumXChanged();
-    void minimumYChanged();
-    void maximumYChanged();
-    void activeChanged();
-    void filterChildrenChanged();
-
-private:
-    QQuickItem *_target;
-    Axis _axis;
-    qreal _xmin;
-    qreal _xmax;
-    qreal _ymin;
-    qreal _ymax;
-    bool _active : 1;
-    bool _filterChildren: 1;
-    Q_DISABLE_COPY(QQuickDrag)
-};
-
-#endif // QT_NO_DRAGANDDROP
-
+class QQuickDrag;
 class QQuickMouseAreaPrivate;
 class QQuickWheelEvent;
 // used in Qt Location
@@ -244,10 +173,6 @@ private:
 
 QT_END_NAMESPACE
 
-#ifndef QT_NO_DRAGANDDROP
-QML_DECLARE_TYPE(QQuickDrag)
-QML_DECLARE_TYPEINFO(QQuickDrag, QML_HAS_ATTACHED_PROPERTIES)
-#endif
 QML_DECLARE_TYPE(QQuickMouseArea)
 
 #endif // QQUICKMOUSEAREA_P_H