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//
// C++ Interface: previewwidget
//
// Description:
//
//
// Author: Mathias Soeken <msoeken@informatik.uni-bremen.de>, (C) 2006
//
// Copyright: See COPYING file that comes with this distribution
//
//
#ifndef PREVIEWWIDGET_H
#define PREVIEWWIDGET_H
#include <qwidget.h>
class QImage;
class QPaintEvent;
class KileInfo;
namespace KileTool
{
class Base;
}
namespace KileWidget
{
/**
* Widget which can display PNG images from Math LaTeX
* Code
*
* This is used to be inserted in the bottom bar of the kile
* main widget. When putting the cursor in a mathgroup, the LaTeX
* source should be extracted and rendered in this widget.
*
* This widget uses one new Tool: DVItoPNG which converts
* a dvi file to an png image, which is fitted to the size
* of the formula).
*
* You could use this widget to implement a formula editor in Kile,
* where the editor is the editor, but with this widget you can see
* the result in a appropriate size just in time.
*
* @author Mathias Soeken <msoeken@informatik.uni-bremen.de>
*/
class PreviewWidget : public QWidget
{
Q_OBJECT
public:
PreviewWidget(KileInfo *info, QWidget *parent = 0, const char *name = 0);
~PreviewWidget();
/**
* Trys to paint the current mathgroup of
* the current document.
*
* If a document is open and the cursor is
* inside a mathgroup, a PNG is generated
* containing this mathgroup.
*
* This PNG image is then displayed on the
* widget.
*/
void showActivePreview(const QString &text,const QString &textfilename,int startrow,int previewtype);
private:
enum { pwDvipng=0, pwDvipsConvert, pwConvert };
KileInfo *m_info;
QImage *m_previewImage;
bool m_running;
QString m_conversionTool;
protected:
void paintEvent (QPaintEvent*);
void showError(const QString &text);
public slots:
/**
* Notify, if the DVItoPNG tool is done.
*
* Because the tool runs async. we
* must wait, if the process is done.
*
* Then we try to generate a image of the
* temporary PNG filename and display it on
* the widget.
*
* The size of the widget is also adjusted
* to the size of the widget.
*/
void drawImage();
void toolDestroyed();
};
}
#endif
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