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/**
* Copyright (C) 2001-2002 the KGhostView authors. See file AUTHORS.
*
* 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.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef KGVPAGEVIEW_H
#define KGVPAGEVIEW_H
#include <tqscrollview.h>
/**
* KGVPageView is a customized TQScrollView, which can hold one page. This page
* will be centered on the viewport. Furthermore it adds the ability to scroll
* the page by dragging it using the mouse.
*/
class KGVPageView : public TQScrollView
{
TQ_OBJECT
public:
KGVPageView( TQWidget* parent = 0, const char* name = 0 );
~KGVPageView() { ; }
void setPage( TQWidget* );
TQWidget* page() const { return _page; }
/**
* Return true if the top resp. bottom of the page is visible.
*/
bool atTop() const;
bool atBottom() const;
/**
* Turn the scrollbars on/off.
*/
void enableScrollBars( bool);
/**
* @reimplemented
*/
bool eventFilter( TQObject*, TQEvent* );
public slots:
bool readUp();
bool readDown();
void scrollUp();
void scrollDown();
void scrollRight();
void scrollLeft();
void scrollBottom();
void scrollTop();
signals:
void viewSizeChanged( const TQSize& );
void pageSizeChanged( const TQSize& );
void nextPage();
void zoomOut();
void zoomIn();
void prevPage();
void rightClick();
void ReadUp();
void ReadDown();
protected:
virtual void keyPressEvent( TQKeyEvent* );
/**
* Reimplemented to from TQScrollView to make sure that the page is centered
* when it fits in the viewport.
*/
virtual void viewportResizeEvent( TQResizeEvent* );
virtual void mousePressEvent( TQMouseEvent *e );
virtual void mouseReleaseEvent( TQMouseEvent *e );
virtual void mouseMoveEvent( TQMouseEvent *e );
virtual void wheelEvent( TQWheelEvent * );
/**
* If the viewport is larger than the page, center the page on the
* viewport.
*/
void centerContents();
private:
TQPoint _dragGrabPos;
TQWidget* _page;
};
#endif
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