make Applet (and lineedit) usable with qgraphics_item cast. we probably want to do this with all of our QGI subclasses.

i introduced a new enum in the Plasma namespace, ItemType, so we can keep track of these id's centrally.
however, the right click mechanism is rather broken in its implementation; we need a way to offer a centralized menu on appets no metter where they are clicked.

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=678562

applet.cpp

@@ -30,6 +30,7 @@
 
 #include "corona.h"
 #include "dataenginemanager.h"
+#include "plasma.h"
 
 namespace Plasma
 {

applet.h

@@ -181,6 +181,12 @@ class PLASMA_EXPORT Applet : public QObject, public QGraphicsItem
          **/
         void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
 
+        /**
+         * Reimplented from QGraphicsItem
+         **/
+        enum { Type = Plasma::AppletType };
+        int type() const { return Type; }
+
     Q_SIGNALS:
         /**
          * Emit this signal when your applet needs to take (or lose) keyboard

plasma.h

@@ -19,6 +19,8 @@
 #ifndef PLASMA_DEFS_H
 #define PLASMA_DEFS_H
 
+#include <QGraphicsItem>
+
 #include <plasma/plasma_export.h>
 
 /**
@@ -75,6 +77,10 @@ enum Location { Floating = 0 /**< Free floating. Neither geometry or z-ordering
                 RightEdge    /**< Along the right side of the screen */
               };
 
+enum ItemTypes { AppletType = QGraphicsItem::UserType + 1,
+                 LineEditType = QGraphicsItem::UserType + 2
+               };
+
 PLASMA_EXPORT void setMinId(int minId);
 PLASMA_EXPORT int uniqueId();
 PLASMA_EXPORT Direction locationToDirection(Location location);

widgets/lineedit.h

@@ -25,6 +25,7 @@
 #include <plasma/plasma_export.h>
 
 #include <plasma/dataengine.h>
+#include <plasma/plasma.h>
 #include <plasma/widgets/layoutitem.h>
 
 namespace Plasma
@@ -62,6 +63,12 @@ class PLASMA_EXPORT LineEdit : public QGraphicsTextItem, public LayoutItem
         const QString toHtml();
         const QString toPlainText();
 
+        /**
+         * Reimplented from QGraphicsItem
+         **/
+        enum { Type = Plasma::LineEditType };
+        int type() const { return Type; }
+
     Q_SIGNALS:
         void editingFinished();
         void textChanged(const QString &text);