widget.cpp

#include "widget.h"


Widget::Widget(QWidget *parent) : QGLWidget(parent) {
    _initialized = false;
}


Widget::Widget(QWidget *parent, QGLFormat const &pformat): QGLWidget(pformat, parent) { 
    _initialized = false;
}

void Widget::setMainApp(AppMain * mainapp) {
    _mainapp = mainapp;
    initializeGL();
}

void Widget::initializeGL()
{
    if (_initialized)
        return;

    makeCurrent();

    glewExperimental = GL_TRUE;
    GLenum err = glewInit();
    if (GLEW_OK != err) {
        /* Problem: glewInit failed, something is seriously wrong. */
        qDebug() << reinterpret_cast<const char*>(glewGetErrorString(err));
        //_errorMessage = reinterpret_cast<const char*>(glewGetErrorString(err));
        //return false;
    }

    glEnable(GL_FRAMEBUFFER_SRGB);
    glEnable(GL_DEPTH_TEST);
    glBlendFunc(GL_ONE, GL_ONE);
    //glBlendEquation(GL_FUNC_ADD);
    glEnable(GL_TEXTURE_2D);

    int width=size().width();
    SetWindowWidth(width);

    int height=size().height();
    SetWindowHeight(height);

    resize (width,height);
    int occlusionQuality=0;
    SetOcclusionQuality(occlusionQuality);

    _mainapp->PrepareScene();

    _initialized = true;

}

void Widget::paintGL()
{
    _mainapp->DrawScene();
}


void Widget::resizeGL(int w, int h)
{
    
    SetWindowHeight(h);
    SetWindowWidth(w);
    _mainapp->UpdateWindowSize();
    updateGL();

}


Widget::~Widget()
{
}



void Widget::wheelEvent(QWheelEvent *event) {

    _mainapp->ZoomInOut(-event->delta()/15 );
    updateGL();

}

void Widget::mouseMoveEvent(QMouseEvent *event) {

    int x_new = event->x();
    int y_new = event->y();


    if (_mouseLeftPressed) 
        _mainapp->RotateMolecule(0.4*(x_new-_mousePosX),0.4*(y_new-_mousePosY));
    else if (_mouseRightPressed)
        _mainapp->MoveLight(0.5*(x_new-_mousePosX),0.5*(y_new-_mousePosY));
    else if(_mouseMiddlePressed)
        _mainapp->MoveCamera(-0.2*(x_new-_mousePosX),0.2*(y_new-_mousePosY));


    _mousePosX = x_new;
    _mousePosY = y_new;

    updateGL();

}


void Widget::mousePressEvent(QMouseEvent *event) {


    int x_new = event->x();
    int y_new = event->y();
    _mousePosX = x_new;
    _mousePosY = y_new;

    if (event->button() == Qt::LeftButton)
        _mouseLeftPressed = true;
    if (event->button() == Qt::RightButton)
        _mouseRightPressed = true;
    if (event->button() == Qt::MiddleButton)
        _mouseMiddlePressed = true;

}
void Widget::mouseReleaseEvent( QMouseEvent *event) {

    if (event->button() == Qt::LeftButton)
        _mouseLeftPressed = false;
    if (event->button() == Qt::RightButton)
        _mouseRightPressed = false;
    if (event->button() == Qt::MiddleButton)
        _mouseMiddlePressed = false;

}