drawing.cpp

#include <QProcess>
#include <QDebug>
#include <QtAlgorithms>
#include <exception>
#include <QWheelEvent>
#include <QInputEvent>
#include "graph.h"
#include "drawing.h"
#include "ui_scene.h"


Drawing::Drawing(QString inputFileName, QWidget *parent) :
	QGraphicsView(parent),
	_graph(new Graph(inputFileName))
{
	setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
	setScene(_graph);
	setDragMode(QGraphicsView::ScrollHandDrag);
}

void Drawing::wheelEvent(QWheelEvent *event)
{
	if (event->modifiers() == Qt::ControlModifier) {
		setTransformationAnchor(QGraphicsView::AnchorViewCenter);
	} else {
		setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
	}

	qreal scaleFactor = 1.2;
	if (event->delta() > 0)
		this->scale(scaleFactor, scaleFactor);
	else
		this->scale(1.0/scaleFactor, 1.0/scaleFactor);
}

Drawing::~Drawing()
{
	delete _graph;
}