Add mapFromItem() and mapToItem() in QDeclarativeItem.

Task-number: QT-2385

2 files changed, 57 insertions, 0 deletions

diff --git a/src/declarative/graphicsitems/qdeclarativeitem.cpp b/src/declarative/graphicsitems/qdeclarativeitem.cpp
index 5014fd8..cb3f542 100644
--- a/src/declarative/graphicsitems/qdeclarativeitem.cpp
+++ b/src/declarative/graphicsitems/qdeclarativeitem.cpp
@@ -43,6 +43,7 @@
 #include "qdeclarativeitem.h"
 
 #include "qdeclarativeevents_p_p.h"
+#include <private/qdeclarativeengine_p.h>
 
 #include <qfxperf_p_p.h>
 #include <qdeclarativeengine.h>
@@ -51,6 +52,7 @@
 #include <qdeclarativeview.h>
 #include <qdeclarativestategroup_p.h>
 #include <qdeclarativecomponent.h>
+#include <qdeclarativeinfo.h>
 
 #include <QDebug>
 #include <QPen>
@@ -2162,6 +2164,58 @@ void QDeclarativeItem::setKeepMouseGrab(bool keep)
 }
 
 /*!
+    \qmlmethod object Item::mapFromItem(Item item, int x, int y)
+
+    Maps the point (\a x, \a y), which is in \a item's coordinate system, to
+    this item's coordinate system, and returns an object with \c x and \c y 
+    properties matching the mapped cooordinate.
+
+    If \a item is a \c null value, this maps the point from the coordinate
+    system of the root QML view.
+*/
+QScriptValue QDeclarativeItem::mapFromItem(const QScriptValue &item, int x, int y) const
+{
+    QScriptValue sv = QDeclarativeEnginePrivate::getScriptEngine(qmlEngine(this))->newObject();
+    QDeclarativeItem *itemObj = qobject_cast<QDeclarativeItem*>(item.toQObject());
+    if (!itemObj && !item.isNull()) {
+        qWarning().nospace() << "mapFromItem() given argument " << item.toString() << " which is neither null nor an Item";
+        return 0;
+    }
+
+    // If QGraphicsItem::mapFromItem() is called with 0, behaves the same as mapFromScene()
+    QPointF p = qobject_cast<QGraphicsItem*>(this)->mapFromItem(itemObj, x, y);
+    sv.setProperty("x", p.x());
+    sv.setProperty("y", p.y());
+    return sv;
+}
+
+/*!
+    \qmlmethod object Item::mapToItem(Item item, int x, int y)
+
+    Maps the point (\a x, \a y), which is in this item's coordinate system, to
+    \a item's coordinate system, and returns an object with \c x and \c y
+    properties matching the mapped cooordinate.
+
+    If \a item is a \c null value, this maps \a x and \a y to the coordinate
+    system of the root QML view.
+*/
+QScriptValue QDeclarativeItem::mapToItem(const QScriptValue &item, int x, int y) const
+{
+    QScriptValue sv = QDeclarativeEnginePrivate::getScriptEngine(qmlEngine(this))->newObject();
+    QDeclarativeItem *itemObj = qobject_cast<QDeclarativeItem*>(item.toQObject());
+    if (!itemObj && !item.isNull()) {
+        qWarning().nospace() << "mapToItem() given argument " << item.toString() << " which is neither null nor an Item";
+        return 0;
+    }
+
+    // If QGraphicsItem::mapToItem() is called with 0, behaves the same as mapToScene()
+    QPointF p = qobject_cast<QGraphicsItem*>(this)->mapToItem(itemObj, x, y);
+    sv.setProperty("x", p.x());
+    sv.setProperty("y", p.y());
+    return sv;
+}
+
+/*!
   \internal
 
   This function emits the \e focusChanged signal.
diff --git a/src/declarative/graphicsitems/qdeclarativeitem.h b/src/declarative/graphicsitems/qdeclarativeitem.h
index 3ae404d..f6fedc7 100644
--- a/src/declarative/graphicsitems/qdeclarativeitem.h
+++ b/src/declarative/graphicsitems/qdeclarativeitem.h
@@ -159,6 +159,9 @@ public:
     bool keepMouseGrab() const;
     void setKeepMouseGrab(bool);
 
+    Q_INVOKABLE QScriptValue mapFromItem(const QScriptValue &item, int x, int y) const;
+    Q_INVOKABLE QScriptValue mapToItem(const QScriptValue &item, int x, int y) const;
+
     QDeclarativeAnchorLine left() const;
     QDeclarativeAnchorLine right() const;
     QDeclarativeAnchorLine horizontalCenter() const;