1 files changed, 118 insertions, 0 deletions
diff --git a/kpovmodeler/pmcommandmanager.h b/kpovmodeler/pmcommandmanager.h
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+//-*-C++-*-
+/*
+**************************************************************************
+                                 description
+                             --------------------
+    copyright            : (C) 2000-2001 by Andreas Zehender
+    email                : [email protected]
+**************************************************************************
+
+**************************************************************************
+*                                                                        *
+*  This program is free software; you can redistribute it and/or modify  *
+*  it under the terms of the GNU General Public License as published by  *
+*  the Free Software Foundation; either version 2 of the License, or     *
+*  (at your option) any later version.                                   *
+*                                                                        *
+**************************************************************************/
+
+
+#ifndef PMCOMMANDMANAGER_H
+#define PMCOMMANDMANAGER_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "pmcommand.h"
+#include <qptrstack.h>
+#include <qobject.h>
+
+class PMPart;
+
+/**
+ * Manager for PMCommand objects.
+ *
+ * The class PMCommandManager stores stacks of commands for undo/redo
+ * operations.
+ */
+class PMCommandManager : public QObject
+{
+   Q_OBJECT
+public:
+   /**
+    * Creates a new PMCommandManager
+    */
+   PMCommandManager( PMPart* thepart );
+   /**
+    * Deletes the command manager. All commands are deleted as well.
+    */
+   ~PMCommandManager( );
+   /**
+    * Adds the @ref PMCommand to the command stack.
+    * All commands in the m_redoCommands stack are deleted.
+    */
+   void execute( PMCommand* cmd );
+   /**
+    * Moves the last command to the m_redoCommands stack.
+    */
+   void undo( );
+   /**
+    * Moves the last redo command to the command stack.
+    */
+   void redo( );
+   /**
+    * Deletes the commands
+    */
+   void clear( );
+   /**
+    * Returns the maximal number of items that can be undone/redone.
+    */
+   unsigned int maxUndoRedo( ) const { return m_maxUndoRedo; }
+   /**
+    * Sets the maximal number of items that can be undone/redone.
+    */
+   void setMaxUndoRedo( unsigned int n ) { m_maxUndoRedo = n; }
+   /**
+    * Called by an executed command. Will emit objectChanged( )
+    */
+   void cmdObjectChanged( PMObject* obj, const int mode );
+   /**
+    * Called by an executed command. Will emit idChanged( )
+    */
+   void cmdIDChanged( PMObject* obj, const QString& oldID );
+   /**
+    * Returns a pointer to the part. For commands that need to access the
+    * part directly.
+    */
+   PMPart* part( ) const { return m_pPart; }
+signals:
+   /**
+    * emmited, when the undo and redo command texts change
+    */
+   void updateUndoRedo( const QString& undo, const QString& redo );
+   /**
+    * Signal that is emitted when an object is changed.
+    * Mode is a bit combination of @ref PMChange constants.
+    */
+   void objectChanged( PMObject* obj, const int mode, QObject* sender );
+   /**
+    * Signal that is emitted when the id of the object is changed
+    */
+   void idChanged( PMObject* obj, const QString& oldID );
+private:
+   /**
+    * The executed commands.
+    */
+   PMCommandList m_commands;
+   /**
+    * The undone commands.
+    */
+   PMCommandList m_redoCommands;
+   // the maximal number of items that can be undone/redone.
+   unsigned int m_maxUndoRedo;
+   PMObject* m_pLastChangedObject;
+   PMPart* m_pPart;
+};
+
+#endif