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//
// C++ Implementation: situationview
//
// Description:
//
//
// Author: Thibaut GRIDEL <tgridel@free.fr>
//
// Copyright (c) 2008-2009 Thibaut GRIDEL
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//
//
#include <iostream>
#include "commontypes.h"
#include "situationview.h"
extern int debugLevel;
SituationView::SituationView(QWidget *parent)
:QGraphicsView(parent) {
}
SituationView::SituationView(QGraphicsScene *scene, QWidget *parent)
: QGraphicsView(scene, parent),
scaleValue(1) {
setRenderHints( QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
setResizeAnchor(QGraphicsView::AnchorViewCenter);
}
SituationView::~SituationView() {
}
/**
Takes a picture of the current view and returns it as a QPixmap.
This method creates a QPixmap and calls render() on that pixmap
before returning it.
*/
QPixmap SituationView::screenShot() {
QPixmap pixmap(size());
pixmap.fill(Qt::white);
QPainter painter(&pixmap);
painter.setRenderHints( QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
render(&painter);
return pixmap;
}
/**
Handles mouse wheel event to zoom in or out.
This method will call setScale() with rotation side.
*/
void SituationView::wheelEvent(QWheelEvent *event) {
if (debugLevel & 1 << VIEW) std::cout << "wheel event " << event->delta() << std::endl;
setScale(event->delta() > 0);
}
void SituationView::zoomIn() {
setScale(true);
}
void SituationView::zoomOut() {
setScale(false);
}
/**
Sets an acceptable scale that fits the whole scenario.
This method compares the matrix() before and after fitInView() and
possibly adopts the scale, rounded to the nearest .05
*/
void SituationView::zoomFit() {
QMatrix old = matrix();
fitInView(scene()->itemsBoundingRect(),Qt::KeepAspectRatio);
qreal s = matrix().m11();
if (s < 10.0 && s > 0.1) {
// adopt scaling
scaleValue = (round(s * 20)) / 20.0;
}
// apply calculated or default scale
QMatrix m(scaleValue, old.m21(), old.m21(), scaleValue, old.dx(), old.dy());
setMatrix(m);
}
/**
Zoom in if \a in otherwise zoom out by .05 increments between
0.1 and 10
*/
void SituationView::setScale(bool in) {
if (in) {
if (scaleValue < 10.0) {
scaleValue += .05;
}
} else if (scaleValue > 0.1) {
scaleValue -= .05;
}
QMatrix old = matrix();
QMatrix m(scaleValue, old.m21(), old.m21(), scaleValue, old.dx(), old.dy());
setMatrix(m);
if (debugLevel & 1 << VIEW) std::cout << "new scale values "
<< " horizontal: " << m.m11()
<< " vertical: " << m.m22() << std::endl;
}
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