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+/*****************************************************************
+
+Copyright (c) 1996-2000 the kicker authors. See file AUTHORS.
+          (c) 2001 Michael Goffioul <goffioul@imec.be>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+******************************************************************/
+
+#ifndef __KPANELMENU_H__
+#define __KPANELMENU_H__
+
+#include <qstring.h>
+#include <kpopupmenu.h>
+#include <kgenericfactory.h>
+
+class KPanelMenuPrivate;
+
+/**
+ * Base class to build dynamically loaded menu entries for the K-menu, or the panel.
+ *
+ * This class allows to build menu entries that will be dynamically added either to
+ * the K-menu, or to the panel as a normal button. These dynamic menus are located
+ * in shared libraries that will be loaded at runtime by Kicker (the KDE panel).
+ *
+ * To build such a menu, you have to inherit this class and implement the pure virtual
+ * functions #initialize() and @ref slotExec(). You also have to provide a factory
+ * object in your library, see @ref KLibFactory. This factory is only used to construct
+ * the menu object.
+ *
+ * Finally, you also have to provide a desktop file describing your dynamic menu. The
+ * relevant entries are: Name, Comment, Icon and X-KDE-Library (which contains the
+ * library name without any extension). This desktop file has to be installed in
+ * $KDEDIR/share/apps/kicker/menuext/.
+ *
+ * @short Base class to build dynamically loaded menu entries for the K-menu, or the panel.
+ * @author The kicker maintainer, Michael Goffioul <goffioul@imec.be>
+ */
+class KPanelMenu : public KPopupMenu
+{
+    Q_OBJECT
+
+public:
+    /**
+     * Construct a KPanelMenu object. This is the normal constructor to use when
+     * building extrernal menu entries.
+     */
+    KPanelMenu(QWidget *parent=0, const char *name=0);
+    /**
+     * Constructor used internally by Kicker. You don't really want to use it.
+     * @param startDir a directory to associate with this menu
+     * @see path(), setPath()
+     */
+    KPanelMenu(const QString &startDir, QWidget *parent=0, const char *name=0);
+    /**
+     * Destructor.
+     */
+    virtual ~KPanelMenu();
+
+    /**
+     * Get the directory path associated with this menu, or QString::null if
+     * there's no such associated path.
+     * @return the associated directory path
+     * @see setPath()
+     */
+    const QString& path() const;
+    /**
+     * Set a directory path to be associated with this menu.
+     * @param p the directory path
+     * @see path()
+     */
+    void setPath(const QString &p);
+    /**
+     * Tell if the menu has been initialized, that is it already contains items.
+     * This is useful when you need to know if you have to clear the menu, or to
+     * fill it.
+     * @return the initial state
+     * @see setInitialized(), initialize()
+     */
+    bool initialized() const;
+    /**
+     * Set the initial state. Set it to true when you menu is filled with the items
+     * you want.
+     * @param on the initial state
+     * @see initialized(), initialize()
+     */
+    void setInitialized(bool on);
+
+    /**
+     * Disable the automatic clearing of the menu. Kicker uses a cache system for
+     * its menus. After a specific configurable delay, the menu will be cleared.
+     * Use this function if you want to disable kicker's cache system, and avoid
+     * the clearing of your menu.
+     */
+    void disableAutoClear();
+
+public slots:
+    /**
+     * Reinitialize the menu: the menu is first cleared, the initial state is set
+     * to false, and finally #initialize() is called. Use this if you want to
+     * refill your menu immediately.
+     */
+    void reinitialize();
+    /**
+     * Deinitialize the menu: the menu is cleared and the initialized state is set to
+     * false. #initialize() is NOT called. It will be called before the menu is
+     * next shown, however. Use this slot if you want a delayed reinitialization.
+     * @since 3.1
+     */
+    void deinitialize();
+
+protected slots:
+    /**
+     * This slot is called just before the menu is shown. This allows your menu
+     * to update itself if needed. However you should instead re-implement
+     * #initialize to provide this feature. This function is responsible for
+     * the cache system handling, so if you re-implement it, you should call
+     * the base function also. Calls #initialize().
+     * @see disableAutoClear()
+     */
+    virtual void slotAboutToShow();
+    /**
+     * This is slot is called when an item from the menu has been selected. Your
+     * applet is then supposed to perform some action. You must re-implement this
+     * function.
+     * @param id the ID associated with the selected item
+     */
+    virtual void slotExec(int id) = 0;
+    /**
+     * This slots is called to initialize the menu. It is called automatically by
+     * @ref slotAboutToShow(). By re-implementing this functions, you can reconstruct
+     * the menu before it is being shown. At the end of this function, you should
+     * call @ref setInitialize() with true to tell the system that the menu is OK.
+     * You applet must re-implement this function.
+     * @see slotAboutToShow(), initialized(), setInitialized()
+     */
+    virtual void initialize() = 0;
+    /**
+     * Clears the menu, and update the initial state accordingly.
+     * @see initialized()
+     */
+    void slotClear();
+
+protected:
+    /**
+     * Re-implemented for internal reasons.
+     */
+    virtual void hideEvent(QHideEvent *ev);
+    /**
+     * For internal use only. Used by constructors.
+     */
+    void init(const QString& path = QString::null);
+
+protected:
+    virtual void virtual_hook( int id, void* data );
+private:
+    void internalInitialize();
+    KPanelMenuPrivate *d;
+};
+
+#define K_EXPORT_KICKER_MENUEXT( libname, classname )                       \
+    K_EXPORT_COMPONENT_FACTORY(                                             \
+        kickermenu_##libname,                                               \
+        KGenericFactory<classname>("libkickermenu_" #libname) )
+
+#endif