Marcion Code

/* Marcion
Copyright (C) 2009 - 2011 Milan Konvicka

   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; version 2 of the License.

   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 */

#include "mimage.h"
//
CMImage::CMImage(CMessages * const messages,
                 QWidget * parent)
        : QGraphicsView(parent),start(),scene(),current(0),
        pixmap(),
        messages(messages)
{
	setScene(&scene);
}
//
void CMImage::mousePressEvent ( QMouseEvent * e )
{
	if(current)
	{
		start=mapToScene(e->pos()+
		QPoint(viewport()->width()/2,viewport()->height()/2));
		current->setCursor(Qt::ClosedHandCursor);
	}
}
void CMImage::mouseReleaseEvent ( QMouseEvent *  )
{
	if(current)
	{
		current->setCursor(Qt::OpenHandCursor);
		start=QPointF();		
	}

}
void CMImage::mouseMoveEvent ( QMouseEvent * e )
{
	if(!start.isNull()&&current)
		centerOn(start-e->pos());
}
bool CMImage::loadPage(QString const & filename,qreal stretch)
{
    USE_CLEAN_WAIT
    messages->MsgMsg(tr("displaying '")+filename+"' ...");
	if(current)
		delete current;
	
	current=0;
	
        //QPixmap pixmap(filename);
        //try{
            if(!pixmap.load(filename))
            {
                messages->MsgErr("'"+filename+tr("' not loaded"));
                return false;
            }
        /*}
        catch(...)
        {
            messages->MsgErr("'"+filename+tr("exception"));
            return false;
        }*/

	int newwidth;
		
        if(stretch==(qreal)0)
            newwidth=viewport()->width()-10;
        else
            newwidth=pixmap.width()*stretch;
		
	scene.clear();
        QPixmap sp=pixmap.scaledToWidth(newwidth);
        scene.setSceneRect(sp.rect());
        current=scene.addPixmap(sp);

        centerOn(1,1);

        messages->MsgOk();
        return true;
}

/*void CMImage::init(CMessages * const messages)
{
    CMessages ** m((CMessages**)&this->messages);
    *m=messages;
}*/

void CMImage::scale(qreal zoom)
{
    USE_CLEAN_WAIT
    scene.clear();
    QPixmap sp=pixmap.scaledToWidth(pixmap.width()*zoom);
    scene.setSceneRect(sp.rect());
    current=scene.addPixmap(sp);
}