myglwidget.cpp

// myglwidget.cpp

#include "myglwidget.h"
#include "GL/glu.h"
#include <QKeyEvent>
#include <QMouseEvent>
MyGLWidget::MyGLWidget(QWidget *parent) :
    QGLWidget(parent), k_mysz(-0.25,-0.25,0.05,1,0,0),k_klawiatura(0.25,0.25,0.15,0,1,0)
{


    backgroundColor[0]=0.8;
    backgroundColor[1]=0.8;
    backgroundColor[2]=0.8;
    backgroundColor[3]=1;



}




void MyGLWidget::initializeGL()
{



    glClearColor(backgroundColor[0],backgroundColor[1],backgroundColor[2],backgroundColor[3]);
    glEnable(GL_DEPTH_TEST);

}

void MyGLWidget::paintGL()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();

    k_klawiatura.rysuj();
    k_mysz.rysuj();





}

void MyGLWidget::resizeGL(int width, int height)
{

    double aspectRatio=double(width)/double(height);
    glViewport(0,0,width,height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    halfRangeX=0.5*aspectRatio;
    halfRangeY=0.5;
    glOrtho(-halfRangeX,halfRangeX,-halfRangeY,halfRangeY,-1,1);
    glMatrixMode(GL_MODELVIEW);
}
double MyGLWidget::getHalfRangeY() const
{
    return halfRangeY;
}

void MyGLWidget::setHalfRangeY(double value)
{
    halfRangeY = value;
}

double MyGLWidget::getHalfRangeX() const
{
    return halfRangeX;
}

void MyGLWidget::setHalfRangeX(double value)
{
    halfRangeX = value;
}



void MyGLWidget::mousePressEvent(QMouseEvent *event)
{
    if(event->button()==Qt::LeftButton)
    {
        k_mysz.setX(2.*getHalfRangeX()*event->x()/width()-getHalfRangeX());
        k_mysz.setY(-(2.*getHalfRangeY()*event->y()/height()-getHalfRangeY()));
        updateGL();
    }
}

void MyGLWidget::keyPressEvent(QKeyEvent *event)
{
    switch(event->key())
    {
        case Qt::Key_Up:
            k_klawiatura.changeY(0.01);
            break;
        case Qt::Key_Down:
            k_klawiatura.changeY(-0.01);
            break;
        case Qt::Key_Right:
            k_klawiatura.changeX(0.01);
            break;
        case Qt::Key_Left:
            k_klawiatura.changeX(-0.01);
            break;

    }
    updateGL();
}