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qextmdimainfrm.h

//----------------------------------------------------------------------------
//    filename             : qextmdimainfrm.h
//----------------------------------------------------------------------------
//    Project              : Qt MDI extension
//
//    begin                : 07/1999       by Szymon Stefanek as part of kvirc
//                                         (an IRC application)
//    changes              : 09/1999       by Falk Brettschneider to create an
//                           - 06/2000     stand-alone Qt extension set of
//                                         classes and a Qt-based library
//                         : 02/2000       by Massimo Morin (mmorin@schedsys.com)
//    patches              : */2000        by Lars Beikirch (Lars.Beikirch@gmx.net)
//
//    copyright            : (C) 1999-2000 by Falk Brettschneider
//                                         and
//                                         Szymon Stefanek (stefanek@tin.it)
//    email                :  gigafalk@yahoo.com (Falk Brettschneider)
//----------------------------------------------------------------------------
//
//----------------------------------------------------------------------------
//
//    This program is free software; you can redistribute it and/or modify
//    it under the terms of the GNU Library General Public License as
//    published by the Free Software Foundation; either version 2 of the
//    License, or (at your option) any later version.
//
//----------------------------------------------------------------------------

#ifndef _QEXTMDIMAINFRM_H_
#define _QEXTMDIMAINFRM_H_

#ifndef NO_KDE2
#include <kmainwindow.h>
#include <kmenubar.h>
#include <kpopupmenu.h>
#include <kparts/dockmainwindow.h>
#else
#include <qmenubar.h>
#include <qpopupmenu.h>
#include "dummykpartsdockmainwindow.h"
#endif

#if QT_VERSION < 300
# include <qlist.h>
#else
# include <qptrlist.h>
#endif
#include <qrect.h>
#include <qapplication.h>
#include <qdom.h>
#include <qguardedptr.h>

#include "qextmditaskbar.h"
#include "qextmdichildarea.h"
#include "qextmdichildview.h"

#include "qextmdiiterator.h"
#include "qextmdilistiterator.h"
#include "qextmdinulliterator.h"

class QTimer;

/**
 * @short Internal class
 *
 * This special event is needed because the view has to inform the main frame that it`s being closed.
 */
00068 class QextMdiViewCloseEvent : public QCustomEvent
{
public:
   QextMdiViewCloseEvent( QextMdiChildView* pWnd) : QCustomEvent(QEvent::User,pWnd) {};
};

/**
  * @short Base class for all your special main frames.
  *
  * It contains the child frame area (QMainWindow's central widget) and a child view taskbar
  * for switching the MDI views. Most methods are virtual functions for later overriding.
  *
  * Basically, this class provides functionality for docking/undocking view windows and
  * manages the taskbar. Usually the programmer just need to know about this class and the child view class.
  *
  * Your program mainwidget should inherit QextMdiMainFrm. Then usually you'll just need
  * @ref addWindow() and @ref removeWindowFromMdi() to control the views.
  *   <PRE>
  *   class MyMainWindow : public QextMdiMainFrm
  *   { .... };
  *   ...
  *   MyMainWindow mainframe;
  *   qApp->setMainWidget(&mainframe);
  *   mainframe->addWindow(view1); // put it under MDI control
  *   mainframe->addWindow(view2);
  *   </PRE>
  *
  * Most public and protected methods of this class are for program calls of the actions
  * the user could click.<br>
  *
  * Dynamic switching the MDI mode can be done via switchToChildframeMode(), switchToToplevelMode(),
  * switchToTabPageMode() or fakeSDIApplication() or asked via mdiMode(), isFakingSDIApplication().
  *
  * This class provides already the "Window" menu needed in common MDI applications. Just
  * insert it in your main menu:
  * <PRE>
  * if (!isFakingSDIApplication()) {
  *    menuBar()->insertItem( tr("&Window"), windowMenu());
  * }
  * </PRE>
  *
  * Synchronize the positions of the MDI control buttons inserted in your mainmenu:
  * <PRE>
  * void B_MainModuleWidget::initMenuBar()
  * {
  *   setMenuForSDIModeSysButtons( menuBar());
  * ...
  * void B_MainModuleWidget::resizeEvent ( QResizeEvent *e)
  * {
  *   QextMdiMainFrm::resizeEvent( e);
  *   setSysButtonsAtMenuPosition();
  * }
  * </PRE>
  *
  * You can dynamically change the shape of the attached MDI views using @ref setFrameDecorOfAttachedViews().
  *
  * Additionally, here's a hint how to restore the mainframe's settings from config file:
  * <PRE>
  * #ifdef NO_KDE2 // KDE2 comes with its own style
  *    int guiStyle = config->readIntEntry( "mainmodule session", "GUI style", 0);
  *    mainframe->setGUIStyle( guiStyle);
  * #endif
  *
  *    // restore MDI mode (toplevel, childframe, tabpage)
  *    int mdiMode = config->readIntEntry( "mainmodule session", "MDI mode", QextMdi::ChildframeMode);
  *    switch (mdiMode) {
  *    case QextMdi::ToplevelMode:
  *       {
  *          int childFrmModeHt = config->readIntEntry( "mainmodule session", "Childframe mode height", desktop()->height() - 50);
  *          mainframe->resize( m_pMdiMainFrm->width(), childFrmModeHt);
  *          mainframe->switchToToplevelMode();
  *       }
  *       break;
  *    case QextMdi::ChildframeMode:
  *       break;
  *    case QextMdi::TabPageMode:
  *       {
  *          int childFrmModeHt = m_pCfgFileManager->readIntEntry( "mainmodule session", "Childframe mode height", desktop()->height() - 50);
  *          mainframe->resize( m_pMdiMainFrm->width(), childFrmModeHt);
  *          mainframe->switchToTabPageMode();
  *       }
  *       break;
  *    default:
  *       break;
  *    }
  *
  *    // restore a possible maximized Childframe mode
  *    bool maxChildFrmMode = config->readBoolEntry( "mainmodule session", "maximized childframes", true);
  *    mainframe->setEnableMaximizedChildFrmMode(maxChildFrmMode);
  * </PRE>
  * The maximized-Childframe mode means that currently all views are maximized in Childframe mode's application desktop.
  *
  * This class provides placing algorithms in Childframe mode. Call @ref tilePragma(), @ref tileAnodine(), @ref tileVertically(),
  * @ref cascadeWindows(), @ref cascadeMaximized(), @ref expandVertical(), @ref expandHorizontal() for those actions.
  *
  * @ref activateView(QextMdiChildView*) and @ref activateView(int index) set the appropriate MDI child view as the active
  * one. It will be raised, gets an active MDI frame and gets the focus. Call @ref activeView() to find out what the
  * current MDI view is.
  *
  * Use @ref detachWindow() and @ref attachWindow() for docking the MDI views to desktop and back.
  *
  * Connect accels of your program with @ref activatePrevWin(), @ref activateNextWin() and @ref activateView(int index).
  *
  * Note: QextMdiChildViews can be added in 2 meanings: Either as a normal child view (usually containing
  * user document views) or as a tool-view (usually containing status, info or control widgets).
  * The tool-views can be added as floating dockwidgets or as stay-on-top desktop windows in tool style.
  *
  * Here's an example how you can suggest things for the adding of views to the MDI control via flags:
  * <PRE>
  * m_mapOfMdiWidgets.insert( pWnd, mh);
  * unsigned int mdiFlags = QextMdi::StandardAdd;
  * if( !bShow)
  *    mdiFlags |= QextMdi::Hide;
  * if( !bAttach)
  *    mdiFlags |= QextMdi::Detach;
  * if( bMinimize)
  *    mdiFlags |= QextMdi::Minimize;
  * if( bToolWindow)
  *    mdiFlags |= QextMdi::ToolWindow;
  * if (m_pMdiMainFrm->isFakingSDIApplication()) {
  *    if (bAttach) { // fake an SDI app
  *       mdiFlags |= QextMdi::Maximize;
  *    }
  *    else {
  *       m_pMdiMainFrm->addWindow( pWnd, QPoint(20, 20), QextMdi::AddWindowFlags(mdiFlags));
  *       return;
  *    }
  * }
  * m_pMdiMainFrm->addWindow( pWnd, QextMdi::AddWindowFlags(mdiFlags));
  * </PRE>
  *
  * Further note: Pay attention to the fact that when you click on the close button of MDI views that their
  * close event should be redirected to @ref closeWindow(). Otherwise the mainframe class will
  * not get noticed about the deleted view and a dangling pointer will remain in the MDI control. The
  * @ref closeWindow() or the @ref removeWindowFromMdi() method is for that issue. The difference is @ref closeWindow()
  * deletes the view object. So if your application wants to control that by itself, call @ref removeWindowFromMdi()
  * and call delete by yourself. See also @ref QextMdiChildView::closeEvent() for tat issue.
  */
00206 class DLL_IMP_EXP_QEXTMDICLASS QextMdiMainFrm : public KParts::DockMainWindow
{
   friend class QextMdiChildView;
   friend class QextMdiTaskBar;
   Q_OBJECT

// attributes
protected:
   QextMdiChildArea        *m_pMdi;
   QextMdiTaskBar          *m_pTaskBar;
#if QT_VERSION < 300
   QList<QextMdiChildView> *m_pWinList;
#else
   QPtrList<QextMdiChildView> *m_pWinList;
#endif
   QextMdiChildView        *m_pCurrentWindow;
   QPopupMenu              *m_pWindowPopup;
   QPopupMenu              *m_pTaskBarPopup;
   QPopupMenu              *m_pWindowMenu;
//   QPopupMenu              *m_pDockMenu;
//   QPopupMenu              *m_pMdiModeMenu;
   QPopupMenu              *m_pPlacingMenu;
#ifdef NO_KDE2
   QMenuBar                *m_pMainMenuBar;
#else
   KMenuBar                *m_pMainMenuBar;
#endif

   QPixmap                 *m_pUndockButtonPixmap;
   QPixmap                 *m_pMinButtonPixmap;
   QPixmap                 *m_pRestoreButtonPixmap;
   QPixmap                 *m_pCloseButtonPixmap;

   QToolButton             *m_pUndock;
   QToolButton             *m_pMinimize;
   QToolButton             *m_pRestore;
   QToolButton             *m_pClose;
   QPoint                  m_undockPositioningOffset;
   static QextMdi::MdiMode m_mdiMode;
   bool                    m_bMaximizedChildFrmMode;
   int                     m_oldMainFrmHeight;
   int                     m_oldMainFrmMinHeight;
   int                     m_oldMainFrmMaxHeight;
   static QextMdi::FrameDecor   m_frameDecoration;
   bool                    m_bSDIApplication;
   QGuardedPtr<KDockWidget> m_pDockbaseAreaOfDocumentViews;
   QGuardedPtr<KDockWidget> m_pDockbaseOfTabPage;
   QDomDocument*           m_pTempDockSession;
   bool                    m_bClearingOfWindowMenuBlocked;

   QTimer*                 m_pDragEndTimer;
// methods
public:
   /**
   * Constructor.
   */
   QextMdiMainFrm( QWidget* parentWidget, const char* name = "", WFlags flags = WType_TopLevel | WDestructiveClose);
   /**
   * Destructor.
   */
   virtual ~QextMdiMainFrm();
   /**
   * Returns whether the application's MDI views are in maximized state or not.
   */
00270    bool isInMaximizedChildFrmMode() { return m_bMaximizedChildFrmMode; };
   /**
   * Returns the MDI mode. This can be one of the enumerations QextMdi::MdiMode.
   */
00274    static QextMdi::MdiMode mdiMode() { return m_mdiMode; };
   /**
   * Returns the focused attached MDI view.
   */
   QextMdiChildView * activeWindow();
   /**
   * Returns a popup menu filled according to the MDI view state. You can override this
   * method to insert additional entries there. The popup menu is usually popuped when the user
   * clicks with the right mouse button on a taskbar entry. The default entries are:
   * Undock/Dock, Restore/Maximize/Minimize, Close and an empty sub-popup ( @ref windowPopup() )
   * menu called Operations.
   */
   virtual QPopupMenu * taskBarPopup(QextMdiChildView *pWnd,bool bIncludeWindowPopup = FALSE);
   /**
   * Returns a popup menu with only a title "Window". You can fill it with own operations entries
   * on the MDI view. This popup menu is inserted as last menu item in @ref taskBarPopup() .
   */
   virtual QPopupMenu * windowPopup(QextMdiChildView *pWnd,bool bIncludeTaskbarPopup = TRUE);
   /**
   * Called in the constructor (forces a resize of all MDI views)
   */
   virtual void applyOptions();
   /**
   * Returns the QextMdiChildView belonging to the given caption string.
   */
   QextMdiChildView * findWindow(const QString& caption);
   /**
   * Returns whether this MDI child view is under MDI control (using @ref addWindow() ) or not.
   */
   bool windowExists(QextMdiChildView *pWnd);
   /**
   * Catches certain Qt events and processes it here.
   * Currently, here this catches only the @ref QextMdiViewCloseEvent (a QextMDI user event) which is sent
   * from itself in @ref childWindowCloseRequest() right after a @ref QextMdiChildView::closeEvent() .
   * The reason for this event to itself is simple: It just wants to break the function call stack.
   * It continues the processing with calling @ref closeWindow() .
   * You see, a @ref close() is translated to a @ref closeWindow() .
   * It is necessary that the main frame has to start an MDI view close action because it must
   * remove the MDI view from MDI control, additionally.
   *
   * This method calls QMainWindow::event , additionally.
   */
   virtual bool event(QEvent* e);
   /**
   * If there's a main menubar given, it will create the 4 maximize mode buttons there (undock, minimize, restore, close).
   */
   virtual void setSysButtonsAtMenuPosition();
   /**
   * Returns the height of the taskbar.
   */
00324    virtual int taskBarHeight() { return m_pTaskBar ? m_pTaskBar->height() : 0; };
   /**
   * Sets an offset value that is used on @ref detachWindow() . The undocked window
   * is visually moved on the desktop by this offset.
   */
00329    virtual void setUndockPositioningOffset( QPoint offset) { m_undockPositioningOffset = offset; };
   /**
   * If you don't want to know about the inner structure of the QextMDI system, you can use
   * this iterator to handle with the MDI view list in a more abstract way.
   * The iterator hides what special data structure is used in QextMDI.
   */
00335    QextMdiIterator<QextMdiChildView*>* createIterator() {
      if ( m_pWinList == 0L) {
         return new QextMdiNullIterator<QextMdiChildView*>();
      } else {
         return new QextMdiListIterator<QextMdiChildView>( *m_pWinList);
      }
   }
   /**
   * Deletes an QextMdiIterator created in the QextMDI library (needed for the windows dll problem).
   */
00345    void deleteIterator(QextMdiIterator<QextMdiChildView*>* pIt) { delete pIt; }
   /**
   * Returns a popup menu that contains the MDI controlled view list.
   * Additionally, this menu provides some placing actions for these views.
   * Usually, you insert this popup menu in your main menubar as "Window" menu.
   */
00351    QPopupMenu* windowMenu() { return m_pWindowMenu; };
   /**
   * Sets a background colour for the MDI view area widget.
   */
00355    virtual void setBackgroundColor( const QColor &c) { m_pMdi->setBackgroundColor( c); };
   /**
   * Sets a background pixmap for the MDI view area widget.
   */
00359    virtual void setBackgroundPixmap( const QPixmap &pm) { m_pMdi->setBackgroundPixmap( pm); };
   /**
   * Sets a size that is used as the default size for a newly to the MDI system added @ref QextMdiChildView .
   *  By default this size is 600x400. So all non-resized added MDI views appear in that size.
   */
00364    void setDefaultChildFrmSize( const QSize& sz)
      { m_pMdi->m_defaultChildFrmSize = sz; };
   /**
   * Returns the default size for a newly added QextMdiChildView. See @ref setDefaultChildFrmSize() .
   */
00369    QSize defaultChildFrmSize()
      { return m_pMdi->m_defaultChildFrmSize; };
   /**
   * Do nothing when in Toplevel mode
   */
   virtual void setMinimumSize( int minw, int minh);
   /**
   * Returns the Childframe mode height of this. Makes only sense when in Toplevel mode.
   */
00378    int childFrameModeHeight() { return m_oldMainFrmHeight; };
   /**
   * Tells the MDI system a QMenu where it can insert buttons for
   * the system menu, undock, minimize, restore actions.
   * If no such menu is given, QextMDI simply overlays the buttons
   * at the upper right-hand side of the main widget.
   */
#ifndef NO_KDE2
   virtual void setMenuForSDIModeSysButtons( KMenuBar* = 0);
#else
   virtual void setMenuForSDIModeSysButtons( QMenuBar* = 0);
#endif
   /**
   * @return the decoration of the window frame of docked (attached) MDI views
   */
00393    static int frameDecorOfAttachedViews() { return m_frameDecoration; };
   /**
   * An SDI application user interface is faked:
   * @li an opened view is always maximized
   * @li buttons for maximized childframe mode aren't inserted in the main menubar
   * @li taskbar and windowmenu are not created/updated
   */
   void fakeSDIApplication();
   /**
   * @returns if we are fake an SDI application (@ref fakeSDIApplication())
   */
00404    bool isFakingSDIApplication() { return m_bSDIApplication; };
   /**
   *
   */
   virtual bool eventFilter(QObject *obj, QEvent *e );
   /**
   *
   */
#if QT_VERSION < 300
   void findRootDockWidgets(QList<KDockWidget>* pRootDockWidgetList, QValueList<QRect>* pPositionList);
#else
   void findRootDockWidgets(QPtrList<KDockWidget>* pRootDockWidgetList, QValueList<QRect>* pPositionList);
#endif

public slots:
   /**
    * One of the most important methods at all!
    * Adds a QextMdiChildView to the MDI system. The main frame takes it under control.
    * You can specify here whether:
    * <UL><LI>the view should be attached or detached.</LI>
    * <LI>shown or hidden</LI>
    * <LI>maximized, minimized or restored (normalized)</LI>
    * <LI>added as tool view (stay-on-top and toplevel) or added as document-type view.
    */
   virtual void addWindow( QextMdiChildView* pView, int flags = QextMdi::StandardAdd);
   /** 
   * See the method above for more details. Additionally, it moves to point pos.
   */
   virtual void addWindow( QextMdiChildView* pView, QPoint pos, int flags = QextMdi::StandardAdd);
   /** 
   * See the method above for more details. Additionally, it sets the geometry.
   */
   virtual void addWindow( QextMdiChildView* pView, QRect rectNormal, int flags = QextMdi::StandardAdd);
   /**
   * Removes a QextMdiChildView from the MDI system and from the main frame`s control.
   * Note: The view will not be deleted, but it's getting toplevel (reparent to 0)!
   */
   virtual void removeWindowFromMdi(QextMdiChildView *pWnd);
   /**
   * Removes a QextMdiChildView from the MDI system and from the main frame`s control.
   * Note: The view will be deleted!
   */
   virtual void closeWindow(QextMdiChildView *pWnd, bool layoutTaskBar = TRUE);
   /**
   * Switches the QextMdiTaskBar on and off.
   */
   virtual void slot_toggleTaskBar();
   /**
    * Makes a main frame controlled undocked QextMdiChildView docked.
    * Doesn't work on QextMdiChildView which aren't added to the MDI system.
    * Use addWindow() for that.
    */
   virtual void attachWindow(QextMdiChildView *pWnd,bool bShow=TRUE);
   /**
    * Makes a docked QextMdiChildView undocked.
    * The view window still remains under the main frame's MDI control.
    */
   virtual void detachWindow(QextMdiChildView *pWnd,bool bShow=TRUE);
   /** 
   * Someone wants that the MDI view to be closed. This method sends a QextMdiViewCloseEvent to itself
   * to break the function call stack. See also @ref event() .
   */
   virtual void childWindowCloseRequest(QextMdiChildView *pWnd);
   /** 
   * Close all views 
   */
   virtual void closeAllViews();
   /** 
   * Iconfiy all views 
   */
   virtual void iconifyAllViews();
   /** 
   * Closes the view of the active (topchild) window 
   */
   virtual void closeActiveView();
   /** 
   * Undocks all view windows (unix-like) 
   */
   virtual void switchToToplevelMode();
   virtual void finishToplevelMode();
   /**
   * Docks all view windows (Windows-like)
   */
   virtual void switchToChildframeMode();
   virtual void finishChildframeMode();
   /**
   * Docks all view windows (Windows-like)
   */
   virtual void switchToTabPageMode();
   virtual void finishTabPageMode();
   /*
   * @return if the view taskbar should be shown if there are MDI views
   */
   bool isViewTaskBarOn();
   /**
   * Shows the view taskbar. This should be connected with your "View" menu. 
   */
   virtual void showViewTaskBar();
   /** 
   * Hides the view taskbar. This should be connected with your "View" menu. 
   */
   virtual void hideViewTaskBar();
   /** 
   * Update of the window menu contents. 
   */
   virtual void fillWindowMenu();

   /** 
   * Cascades the windows without resizing them. 
   */
00514    virtual void cascadeWindows() { m_pMdi->cascadeWindows(); }
   /** 
   * Cascades the windows resizing them to the maximum available size. 
   */
00518    virtual void cascadeMaximized() { m_pMdi->cascadeMaximized(); };
   /** 
   * Maximizes only in vertical direction.
   */
00522    virtual void expandVertical() { m_pMdi->expandVertical(); };
   /** 
   * Maximizes only in horizontal direction.
   */
00526    virtual void expandHorizontal() { m_pMdi->expandHorizontal(); };
   /** 
   * Tile Pragma 
   */
00530    virtual void tilePragma() { m_pMdi->tilePragma(); };
   /** 
   * Tile Anodine 
   */
00534    virtual void tileAnodine() { m_pMdi->tileAnodine(); };
   /** 
   * Tile Vertically 
   */
00538    virtual void tileVertically() { m_pMdi->tileVertically(); };
   /**
   * Sets the decoration of the window frame of docked (attached) MDI views
   */
   virtual void setFrameDecorOfAttachedViews( int frameDecor);
   /**
   * If in Childframe mode, we can switch between maximized or restored shown MDI views
   */
   virtual void setEnableMaximizedChildFrmMode(bool bEnable);
   /**
   * Activates the next open view
   */
   virtual void activateNextWin();
   /**
   * Activates the previous open view
   */
   virtual void activatePrevWin();
   /**
   * Activates the view with the tab page index (TabPage mode only)
   */
   virtual void activateView(int index);

protected:
   /**
   *
   */
   virtual void resizeEvent(QResizeEvent * );
   /**
   * Creates a new MDI taskbar (showing the MDI views as taskbar entries) and shows it.
   */
   virtual void createTaskBar();
   /**
   * Creates the MDI view area and connects some signals and slots with the QextMdiMainFrm widget.
   */
   virtual void createMdiManager();
   /** 
   * Usually called from @ref addWindow() when adding a tool view window. It reparents the given widget
   * as toplevel and stay-on-top on the application's main widget.
   */
   virtual void addToolWindow( QWidget* pWnd, KDockWidget::DockPosition pos = KDockWidget::DockNone, QWidget* pTargetWnd = 0L, int percent = 50, const QString& tabToolTip = 0, const QString& tabCaption = 0);
   /**
   * prevents fillWindowMenu() from m_pWindowMenu->clear(). You have to care for it by yourself.
   * This is useful if you want to add some actions in your overridden fillWindowMenu() method.
   */
00582    void blockClearingOfWindowMenu( bool bBlocked) { m_bClearingOfWindowMenuBlocked = bBlocked; };

protected slots: // Protected slots
   /** 
   * Sets the focus to this MDI view, raises it, activates its taskbar button and updates
   * the system buttons in the main menubar when in maximized (Maximize mode).
   */
   virtual void activateView(QextMdiChildView *pWnd);
   /** 
   * Activates the MDI view (see @ref activateView() ) and popups the taskBar popup menu (see @ref taskBarPopup() ).
   */
   virtual void taskbarButtonRightClicked(QextMdiChildView *pWnd);
   /**
   * Turns the system buttons for maximize mode (SDI mode) off, and disconnects them 
   */
   void switchOffMaximizeModeForMenu(QextMdiChildFrm* oldChild);
   /**
   * Reconnects the system buttons form maximize mode (SDI mode) with the new child frame 
   */
   void updateSysButtonConnections( QextMdiChildFrm* oldChild, QextMdiChildFrm* newChild);
   /** 
   * Usually called when the user clicks an MDI view item in the "Window" menu.
   */
   void windowMenuItemActivated(int id);
   /** 
   * Usually called when the user clicks an MDI view item in the sub-popup menu "Docking" of the "Window" menu.
   */
   void dockMenuItemActivated(int id);
   /** 
   * Popups the "Window" menu. See also @ref windowPopup() .
   */
   void popupWindowMenu(QPoint p);
   /**
   * The timer for main widget moving has elapsed -> send drag end to all concerned views.
   */
   void dragEndTimeOut();

signals:
   /** 
   * Signals the last attached @ref QextMdiChildView has been closed 
   */
   void lastChildFrmClosed();
   /** 
   * Signals the last QextMdiChildView (that is under MDI control) has been closed 
   */
   void lastChildViewClosed();
   /**
   * Signals that the Toplevel mode has been left
   */
   void leftTopLevelMode();
   /**
   * Signals that a child view has been detached (undocked to desktop)
   */
   void childViewIsDetachedNow(QWidget*);
};

#endif //_QEXTMDIMAINFRM_H_

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