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  • Committer: Bazaar Package Importer
  • Author(s): Cyril Brulebois
  • Date: 2008-01-06 04:39:36 UTC
  • mfrom: (1.1.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20080106043936-a9u9g7yih3w16ru5
Tags: 1.9.0-1
* New upstream release.
* Replace “COPYING” with “LICENSE” in the NOT_NEEDED variable of
  debian/rules, following upstream's renaming.
* Update debian/links accordingly.
* Delete the matching TODO item since there's no longer needed to have a
  patched (with HTML tags) license file to get a correct display in the
  “License agreement” tab.
* Update the gcc4.3 patch (drop the hunk touching src/Libpfs/pfs.cpp):
   - 20_gcc4.3_includes.
* Add a link from /usr/share/qtpfsgui/html to the HTML documentation
  under /usr/share/doc/qtpfsgui/html since the former is used at runtime
  to display the manual.

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src/smart_scroll_area.cpp
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/**
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 * This file is a part of Qtpfsgui package.
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 * ---------------------------------------------------------------------- 
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 * Copyright (C) 2007 Giuseppe Rota
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 * 
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; either version 2 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program 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
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 * ---------------------------------------------------------------------- 
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 *
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 * @author Giuseppe Rota <grota@users.sourceforge.net>
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 */
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#include "smart_scroll_area.h"
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#include <QPixmap>
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SmartScrollArea::SmartScrollArea( QWidget *parent, QLabel *imagelabel ) : QScrollArea(parent), imageLabel(imagelabel), scaleFactor(1.0), fittingwin(false) {
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        setBackgroundRole(QPalette::Light);
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        imageLabel->setBackgroundRole(QPalette::Base);
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        //the label ignores the pixmap's size
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        imageLabel->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
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        //the label will scale the image to fill all available space (to its -the label's- size)
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        imageLabel->setScaledContents(true);
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        //false (the default), the scroll area honors the size of its widget.
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        //Regardless of this property, you can programmatically resize the widget using widget()->resize()
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        //indeed, when I zoom in/out I call imageLabel->resize(...)
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        setWidgetResizable(false);
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        setWidget(imageLabel);
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}
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void SmartScrollArea::zoomIn() {
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        scaleImage(1.25);
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}
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void SmartScrollArea::zoomOut() {
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        scaleImage(0.8);
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}
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void SmartScrollArea::fitToWindow(bool checked) {
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        fittingwin=checked;
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        if (checked)
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                scaleLabelToFit();
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        else
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                // restore to the previous zoom factor
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                scaleImage(1);
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}
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void SmartScrollArea::normalSize() {
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        //use the image size for the label
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        imageLabel->adjustSize();
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        scaleFactor = 1.0;
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}
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void SmartScrollArea::scaleLabelToFit() {
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        int sa_width=this->size().width();
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        int sa_height=this->size().height();
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        float imageratio=float(imageLabel->pixmap()->size().width())/float(imageLabel->pixmap()->size().height());
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        float factor=1;
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        if (sa_width<imageratio*sa_height) {
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                factor=float(sa_width)/float(imageLabel->pixmap()->size().width());
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        } else {
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                factor=float(sa_height)/float(imageLabel->pixmap()->size().height());
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        }
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        imageLabel->resize(factor * 0.99 * imageLabel->pixmap()->size());
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}
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void SmartScrollArea::scaleImage(double factor) {
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        scaleFactor *= factor;
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        imageLabel->resize(scaleFactor * imageLabel->pixmap()->size());
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        adjustScrollBar(horizontalScrollBar(), factor);
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        adjustScrollBar(verticalScrollBar(), factor);
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}
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void SmartScrollArea::adjustScrollBar(QScrollBar *scrollBar, double factor) {
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        scrollBar->setValue(int(factor * scrollBar->value() + ((factor - 1) * scrollBar->pageStep()/2)));
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}
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void SmartScrollArea::resizeEvent ( QResizeEvent * e) {
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        if (fittingwin) {
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                scaleLabelToFit();
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        } else {
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                //this seems to be a bug in qt4
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                imageLabel->resize(imageLabel->size()-QSize(0,1));
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                imageLabel->resize(imageLabel->size()+QSize(0,1));
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//              QScrollBar *h=horizontalScrollBar();
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//              QScrollBar *v=verticalScrollBar();
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//              int fixwidth=imageLabel->size().width()+v->size().width()-this->size().width();
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//              if (fixwidth>0)
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//                      h->setMaximum(qMax(0,fixwidth));
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//              else
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//                      h->setMaximum(0);
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//              int fixheight=imageLabel->size().height()-this->size().height();
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//              if (fixheight>0)
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//                      v->setMaximum(qMax(0,fixheight));
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//              else
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//                      v->setMaximum(0);
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        }
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}
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void SmartScrollArea::mouseMoveEvent(QMouseEvent *e) {
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        if (e->buttons()==Qt::MidButton) {
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                QPoint diff = e->pos() - mousePos;
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                if (e->modifiers()==Qt::ShiftModifier)
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                        diff*=5;
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                mousePos = e->pos();
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                verticalScrollBar()->setValue(verticalScrollBar()->value() + 
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        diff.y());
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                horizontalScrollBar()->setValue(horizontalScrollBar()->value() + 
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        diff.x());
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        }
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}