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graphicwidget.cpp
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graphicwidget.cpp
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#include <iostream>
#include <QApplication>
#include <QWidget>
#include <QPainter>
#include <QPaintEvent>
#include <QHBoxLayout>
#include <QPushButton>
#include <QVBoxLayout>
#include <QFileDialog>
#include "graphicwidget.h"
#include <QTimer>
using namespace std;
void GraphicWidget::mousePressEvent(QMouseEvent *event)
{
posX = event->x();
posY = event->y();
update();
cout << "A mouse button was pressed" << endl;
cout << "Mouse cursor coordinates: ";
cout << event->x() << ", " << event->y() << endl;
if (event->button() == Qt::LeftButton)
{
cout << "Left ";
}
if (event->button() == Qt::MidButton)
{
cout << "Middle ";
}
if (event->button() == Qt::RightButton)
{
cout << "Right ";
}
cout << "mouse button was pressed" << endl;
lastPosX = event->x();
lastPosY = event->y();
}
GraphicWidget::GraphicWidget()
{
setFormat(QGLFormat(QGL::DoubleBuffer | QGL::DepthBuffer));
displayRectangle = true;
fileName = "No file supplied";
lastPosX = 0;
lastPosY = 0;
rotationX = 10;
rotationY = 60;
timer = new QTimer;
connect(timer, SIGNAL(timeout()), this, SLOT(timerTick()));
}
GraphicWidget::~GraphicWidget()
{
if (timer != 0)
delete timer;
timer = 0;
}
void GraphicWidget::paintGL()
{
glViewport(0, 0, width(), height());
glEnable(GL_DEPTH_TEST);
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotatef(rotationX, 1.0, 0.0, 0.0);
glRotatef(rotationY, 0.0, 1.0, 0.0);
glBegin(GL_TRIANGLES);
glColor3f(1.0, 0.0, 0.0);
glVertex3f(0.0, -0.4, 0.8);
glVertex3f(0.7, -0.4, -0.4);
glVertex3f(-0.7, -0.4, -0.4);
glColor3f(0.0, 1.0, 0.0);
glVertex3f(0.0, -0.4, 0.8);
glVertex3f(-0.7, -0.4, -0.4);
glVertex3f(0.0, 0.8, 0.0);
glColor3f(0.0, 0.0, 1.0);
glVertex3f(0.0, -0.4, 0.8);
glVertex3f(0.0, 0.8, 0.0);
glVertex3f(0.7, -0.4, -0.4);
glColor3f(1.0, 1.0, 0.0);
glVertex3f(0.7, -0.4, -0.4);
glVertex3f(0.0, 0.8, 0.0);
glVertex3f(-0.7, -0.4, -0.4);
glEnd();
}
void GraphicWidget::mouseMoveEvent(QMouseEvent *event)
{
rotationX += 0.5 * (lastPosY - event->y());
rotationY += 0.5 * (lastPosX - event->x());
updateGL();
lastPosX = event->x();
lastPosY = event->y();
}
void GraphicWidget::startRotation()
{
cout << "'Start' button was pressed" << endl;
// set to 10 instead of 100 in order to reach more smooth rotation in combination with rotationY += 1 instead of 10
timer->start(10);
}
void GraphicWidget::stopRotation()
{
cout << "'Stop' button was pressed" << endl;
timer->stop();
}
void GraphicWidget::timerTick()
{
cout << "Printing the timer" << endl;
// set to 1 instead of 10 in order to reach more smooth rotation in combination with timer->start(10) instead of 100
rotationY += 1;
updateGL();
}