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- /* This file is part of the KDE project
- Copyright (C) 1998, 1999, 2000 Torben Weis <weis@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 HANDLER_H
- #define HANDLER_H
-
- #include <qobject.h>
- #include <KoDocumentChild.h>
-
- class QWMatrix;
-
- class KoView;
- class KoPartResizeHandlerPrivate;
- class KoPartMoveHandlerPrivate;
-
- /**
- * @brief An abstract base class for event handlers.
- *
- * The idea of an event handler is that it is created for a
- * certain purpose, for example moving or resizing of a part.
- * Once that action is finished, the handler will destroy
- * itself.
- *
- * This design pattern helps you to keep your event filters
- * and your mousePressEvent, mouseMoveEvent etc. methods clean.
- */
- class KOFFICECORE_EXPORT KoEventHandler : public QObject
- {
- Q_OBJECT
- public:
- KoEventHandler( QObject* target );
- ~KoEventHandler();
-
- QObject* target();
-
- private:
- QObject* m_target;
- };
-
- /**
- * Used by @ref KoContainerHandler internally to handle resizing of
- * embedded documents.
- */
- class KoPartResizeHandler : public KoEventHandler
- {
- Q_OBJECT
- public:
- KoPartResizeHandler( QWidget* widget, const QWMatrix& matrix, KoView* view, KoChild* child,
- KoChild::Gadget gadget, const QPoint& point );
- ~KoPartResizeHandler();
-
- protected:
- void repaint(QRegion &rgn);
- bool eventFilter( QObject*, QEvent* );
-
- private:
- KoPartResizeHandlerPrivate *d;
- };
-
- /**
- * Used by @ref KoContainerHandler internally to handle moving of
- * embedded documents.
- */
- class KoPartMoveHandler : public KoEventHandler
- {
- Q_OBJECT
- public:
- KoPartMoveHandler( QWidget* widget, const QWMatrix& matrix, KoView* view, KoChild* child,
- const QPoint& point );
- ~KoPartMoveHandler();
-
- protected:
- bool eventFilter( QObject*, QEvent* );
-
- private:
- KoPartMoveHandlerPrivate *d;
- };
-
- /**
- * This class can handle moving and resizing of embedded
- * documents in your class derived from @ref KoView.
- *
- * Just create one instance per view of this class and parts
- * will magically be moved around on your document.
- *
- * This class acts like an event filter on your view, so the
- * mouse events which are used for parts moving and resizing
- * will never show up in your view.
- *
- * @see KoPartMoveHandlerPrivate
- * @see KoPartResizeHandlerPrivate
- */
- class KOFFICECORE_EXPORT KoContainerHandler : public KoEventHandler
- {
- Q_OBJECT
- public:
- KoContainerHandler( KoView* view, QWidget* widget );
- ~KoContainerHandler();
-
- signals:
- /**
- * Emitted if the user wants to open the popup menu for some
- * child object.
- */
- void popupMenu( KoChild*, const QPoint& global_pos );
-
- /**
- * Emitted if the user pressed the delete key whilst a child was selected
- */
- void deleteChild( KoChild* );
-
- protected:
- bool eventFilter( QObject*, QEvent* );
-
- private:
- /// This is a little helper function to get rid of some duplicated code
- KoChild *child(KoChild::Gadget &gadget, QPoint &pos, const QMouseEvent *ev);
- KoView* m_view;
- };
-
- #endif
-