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- /* This file is part of the KDE project
- Copyright (C) 2000 Werner Trobin <trobin@kde.org>
- Copyright (C) 2000 David Faure <faure@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 as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- 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 kocommandhistory_h
- #define kocommandhistory_h
-
- #include <qptrlist.h>
- #include <qstring.h>
- #include <qobject.h>
- #include <koffice_export.h>
-
- class KAction;
- class KActionCollection;
- class QPopupMenu;
- class KCommand;
- #include <qlistbox.h>
-
- class KoListBox : public QListBox {
- Q_OBJECT
- public:
- KoListBox( QWidget *parent = 0, const char *name = 0, WFlags f = 0 );
- protected:
- virtual void contentsMouseMoveEvent ( QMouseEvent * );
- virtual QSize sizeHint() const;
- signals:
- void changeNumberOfSelectedItem( int );
- };
-
- /**
- * The command history stores a (user) configurable amount of
- * Commands. It keeps track of its size and deletes commands
- * if it gets too large. The user can set a maximum undo and
- * a maximum redo limit (e.g. max. 50 undo / 30 redo commands).
- * The KoCommandHistory keeps track of the "borders" and deletes
- * commands, if appropriate. It also activates/deactivates the
- * undo/redo actions in the menu and changes the text according
- * to the name of the command.
- *
- * @short History of user commands (for undo/redo)
- */
- class KOFFICEUI_EXPORT KoCommandHistory : public QObject {
- Q_OBJECT
- public:
- /**
- * Creates a command history, to store commands.
- * This constructor doesn't create actions, so you need to call
- * #undo and #redo yourself.
- */
- KoCommandHistory();
-
- /**
- * Creates a command history, to store commands.
- * This also creates an undo and a redo action, in the @p actionCollection,
- * using the standard names ("edit_undo" and "edit_redo").
- *
- * @param actionCollection the collection to put the history in.
- * @param withMenus if true, the actions will display a menu when plugged
- * into a toolbar.
- */
- KoCommandHistory(KActionCollection *actionCollection, bool withMenus = true);
-
- /**
- * Destructs the command history object.
- */
- virtual ~KoCommandHistory();
-
- /**
- * Erases all the undo/redo history.
- * Use this when reloading the data, for instance, since this invalidates
- * all the commands.
- */
- void clear();
-
- /**
- * Adds a command to the history. Call this for each @p command you create.
- * Unless you set @p execute to false, this will also execute the command.
- * This means, most of the application's code will look like:
- *
- * MyCommand * cmd = new MyCommand(i18n("The Name"), parameters);
- * m_historyCommand.addCommand( cmd );
- */
- void addCommand(KCommand *command, bool execute=true);
-
- /**
- * @return the maximum number of items in the undo history
- */
- int undoLimit() const { return m_undoLimit; }
- /**
- * Sets the maximum number of items in the undo history.
- */
- void setUndoLimit(int limit);
- /**
- * @return the maximum number of items in the redo history
- */
- int redoLimit() const { return m_redoLimit; }
- /**
- * Sets the maximum number of items in the redo history.
- */
- void setRedoLimit(int limit);
-
- /**
- * Enable or disable the undo and redo actions.
- * This isn't usually necessary, but this method can be useful if
- * you disable all actions (to go to a "readonly" state), and then
- * want to come back to a readwrite mode.
- */
- void updateActions();
-
- /**
- * @return the current top item on the history stack
- */
- KCommand * presentCommand();
-
- public slots:
- /**
- * Undoes the last action.
- * Call this if you don't use the builtin KActions.
- */
- virtual void undo();
- /**
- * Redoes the last undone action.
- * Call this if you don't use the builtin KActions.
- */
- virtual void redo();
- /**
- * Remembers when you saved the document.
- * Call this right after saving the document. As soon as
- * the history reaches the current index again (via some
- * undo/redo operations) it will emit @ref documentRestored
- * If you implemented undo/redo properly the document is
- * the same you saved before.
- */
- virtual void documentSaved();
-
- protected slots:
- void slotUndoAboutToShow();
- void slotUndoActivated( int );
- void slotRedoAboutToShow();
- void slotRedoActivated( int );
- void slotUndoActivated( QListBoxItem *);
- void slotRedoActivated( QListBoxItem *);
- void slotChangeRedoNumberOfSelectedItem( int );
- void slotChangeUndoNumberOfSelectedItem( int );
- signals:
- /**
- * Emitted every time a command is executed
- * (whether by addCommand, undo or redo).
- * You can use this to update the GUI, for instance.
- */
- void commandExecuted();
-
- /**
- * Emitted every time a command is executed
- * (whether by addCommand, undo or redo).
- * You can use this to update the GUI, for instance.
- * @param command was executed
- */
- void commandExecuted(KCommand *cmd);
-
- /**
- * Emitted every time we reach the index where you
- * saved the document for the last time. See @ref #documentSaved
- */
- void documentRestored();
-
- private:
- void clipCommands(); // ensures that the limits are kept
-
- QPtrList<KCommand> m_commands;
- KAction *m_undo, *m_redo;
- QPopupMenu *m_undoPopup, *m_redoPopup;
- int m_undoLimit, m_redoLimit;
- bool m_first; // attention: it's the first command in the list!
- protected:
- virtual void virtual_hook( int id, void* data );
- private:
- class KoCommandHistoryPrivate;
- KoCommandHistoryPrivate *d;
- };
-
- #endif
-