depliagevue3d.cpp

// QGraphicsView de la vue 3D avec zoom et rotation caméra
//---------------------------------------------------------
#include "depliagevue3d.h"
//---------------------------------------------------------
DepliageVue3d::DepliageVue3d () {
}

DepliageVue3d::DepliageVue3d (QWidget *parent) : QGraphicsView(parent) {
    setFrameStyle(QFrame::Panel);
    enMouvement = false;
}

void DepliageVue3d::mousePressEvent (QMouseEvent *event) {
    if (!enMouvement) {
        if (event->button() == Qt::MiddleButton) {
            _pan = true;
            _panStartX = event->position().x();
            _panStartY = event->position().y();
            setCursor(Qt::ClosedHandCursor);
            event->accept();
            //return;
        }
    }
    QGraphicsView::mousePressEvent (event);
}

void DepliageVue3d::mouseReleaseEvent (QMouseEvent *event) {
    //if (event->button() == Qt::MiddleButton) {
    if (!enMouvement) {
        _pan = false;
        setCursor (Qt::ArrowCursor);
        event->accept();
        //return;
    }
    QGraphicsView::mouseReleaseEvent (event);
}

void DepliageVue3d::mouseMoveEvent (QMouseEvent *event) {
    if (!enMouvement) {
        if (_pan) { // && (event->button() == Qt::MiddleButton)) {
            qreal dx = event->position().x() - _panStartX;
            qreal dy = event->position().y() - _panStartY;
            qreal adx = qFabs(dx);
            qreal ady = qFabs(dy);
            if (adx > 4 || ady > 3) {
                if (adx < 20 && ady < 15) {
                    qreal dZ = dx/24; //dx/24;
                    qreal dX = dy/24; //dy/18;
                    emit tourne3D (dZ, dX, 0);
                    _panStartX = event->position().x();
                    _panStartY = event->position().y();
                    event->accept();
                    //return;
                }
            }
        }
    }
    QGraphicsView::mouseMoveEvent (event);
}

void DepliageVue3d::wheelEvent (QWheelEvent *event) {
    if (!enMouvement) {
        if (event->buttons().testFlag(Qt::RightButton)) {
            int d = event->angleDelta().y();
            if (d < 0)
                this->scale(0.9f, 0.9f);
            else if (d>0)
                this->scale(1.1f, 1.1f);
            //return;
        } else
            event->ignore();
    }
    QGraphicsView::wheelEvent (event);
}