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diff --git a/libksirtet/base/kzoommainwindow.h b/libksirtet/base/kzoommainwindow.h
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+/*
+    This file is part of the KDE games library
+    Copyright (C) 2004 Nicolas Hadacek (hadacek@kde.org)
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License version 2 as published by the Free Software Foundation.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#ifndef KZOOMMAINWINDOW_H
+#define KZOOMMAINWINDOW_H
+
+#include <kmainwindow.h>
+#include <kdemacros.h>
+
+
+class KToggleAction;
+
+/**
+ * KZoomMainWindow is a main window of fixed size. Its size can be
+ * modified with the "zoom in"/"zoom out" actions.
+ *
+ * It manages one or several widgets: their adjustSize() method is
+ * called whenever the zoom level is changed.
+ * The usual implementation for those widget is to redefine adjustSize()
+ * with code like:
+ * /code
+ * setFixedSize(newsize);
+ * /endcode
+ *
+ * This class also has a "show/hide menubar" action and allows the use
+ * of a context popup menu (useful to restore the menubar when hidden).
+ */
+class KDE_EXPORT KZoomMainWindow : public KMainWindow
+{
+  Q_OBJECT
+public:
+  /** Constructor. */
+  KZoomMainWindow(uint minZoom, uint maxZoom, uint zoomStep,
+                  const char *name = 0);
+
+  /** Add a widget to be managed i.e. the adjustSize() method of the
+   * widget is called whenever the zoom is changed.
+   * This function assumes that the topLevelWidget() is the KZoomMainWindow.
+   */
+  static void addWidget(QWidget *widget);
+                  
+  uint zoom() const { return _zoom; }
+  
+public slots:
+  void zoomIn();
+  void zoomOut();
+  void toggleMenubar();
+
+protected:
+  /** You need to call this after the createGUI or setupGUI method
+   * is called.
+   * @param popupName is the name of the context popup menu as defined in
+   * the ui.rc file.
+   */
+  void init(const char *popupName = 0);
+    
+  virtual void setZoom(uint zoom);
+  virtual bool eventFilter(QObject *o, QEvent *e);
+  virtual bool queryExit();
+  
+  /** You need to implement this method since different application
+   * use different setting class names and keys.
+   * Use something like:
+   * /code
+   * Settings::setZoom(zoom);
+   * Settings::writeConfig();
+   * /endcode
+   */
+  virtual void writeZoomSetting(uint zoom) = 0;
+  
+  /** Youneed to implement this method since different application
+   * use different setting class names and keys.
+   * Use something like:
+   * /code
+   * return Settings::zoom();
+   * /endcode
+   */
+  virtual uint readZoomSetting() const = 0;
+  
+  /** You need to implement this method since different application
+   * use different setting class names and keys.
+   * Use something like:
+   * /code
+   * Settings::setMenubarVisible(visible);
+   * Settings::writeConfig();
+   * /endcode
+   */
+  virtual void writeMenubarVisibleSetting(bool visible) = 0;
+  
+  /** You need to implement this method since different application
+   * use different setting class names and keys.
+   * Use something like: 
+   * /code
+   * Settings::menubarVisible();
+   * /endcode
+   */
+  virtual bool menubarVisibleSetting() const = 0;
+
+private slots:
+  void widgetDestroyed();
+  
+private:
+  uint _zoom, _zoomStep, _minZoom, _maxZoom;
+  QPtrList<QWidget> _widgets;
+  KAction *_zoomInAction, *_zoomOutAction;
+  KToggleAction *_menu;
+  
+  class KZoomMainWindowPrivate;
+  KZoomMainWindowPrivate *d;
+};
+
+#endif