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142 lines
3.7 KiB
142 lines
3.7 KiB
/* This file is part of the KDE project
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Copyright (C) 1998, 1999, 2000 Torben Weis <weis@kde.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef HANDLER_H
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#define HANDLER_H
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#include <tqobject.h>
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#include <KoDocumentChild.h>
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class TQWMatrix;
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class KoView;
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class KoPartResizeHandlerPrivate;
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class KoPartMoveHandlerPrivate;
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/**
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* @brief An abstract base class for event handlers.
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*
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* The idea of an event handler is that it is created for a
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* certain purpose, for example moving or resizing of a part.
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* Once that action is finished, the handler will destroy
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* itself.
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*
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* This design pattern helps you to keep your event filters
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* and your mousePressEvent, mouseMoveEvent etc. methods clean.
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*/
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class KOFFICECORE_EXPORT KoEventHandler : public TQObject
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{
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TQ_OBJECT
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public:
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KoEventHandler( TQObject* target );
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~KoEventHandler();
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TQObject* target();
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private:
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TQObject* m_target;
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};
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/**
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* Used by @ref KoContainerHandler internally to handle resizing of
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* embedded documents.
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*/
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class KoPartResizeHandler : public KoEventHandler
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{
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TQ_OBJECT
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public:
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KoPartResizeHandler( TQWidget* widget, const TQWMatrix& matrix, KoView* view, KoChild* child,
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KoChild::Gadget gadget, const TQPoint& point );
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~KoPartResizeHandler();
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protected:
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void repaint(TQRegion &rgn);
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bool eventFilter( TQObject*, TQEvent* );
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private:
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KoPartResizeHandlerPrivate *d;
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};
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/**
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* Used by @ref KoContainerHandler internally to handle moving of
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* embedded documents.
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*/
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class KoPartMoveHandler : public KoEventHandler
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{
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TQ_OBJECT
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public:
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KoPartMoveHandler( TQWidget* widget, const TQWMatrix& matrix, KoView* view, KoChild* child,
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const TQPoint& point );
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~KoPartMoveHandler();
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protected:
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bool eventFilter( TQObject*, TQEvent* );
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private:
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KoPartMoveHandlerPrivate *d;
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};
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/**
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* This class can handle moving and resizing of embedded
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* documents in your class derived from @ref KoView.
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*
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* Just create one instance per view of this class and parts
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* will magically be moved around on your document.
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*
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* This class acts like an event filter on your view, so the
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* mouse events which are used for parts moving and resizing
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* will never show up in your view.
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*
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* @see KoPartMoveHandlerPrivate
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* @see KoPartResizeHandlerPrivate
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*/
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class KOFFICECORE_EXPORT KoContainerHandler : public KoEventHandler
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{
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TQ_OBJECT
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public:
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KoContainerHandler( KoView* view, TQWidget* widget );
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~KoContainerHandler();
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signals:
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/**
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* Emitted if the user wants to open the popup menu for some
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* child object.
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*/
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void popupMenu( KoChild*, const TQPoint& global_pos );
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/**
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* Emitted if the user pressed the delete key whilst a child was selected
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*/
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void deleteChild( KoChild* );
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protected:
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bool eventFilter( TQObject*, TQEvent* );
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private:
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/// This is a little helper function to get rid of some duplicated code
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KoChild *child(KoChild::Gadget &gadget, TQPoint &pos, const TQMouseEvent *ev);
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KoView* m_view;
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};
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#endif
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