CQtGlCanvasBase.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */

#include "gui-precomp.h"  // Precompiled headers

#include <mrpt/gui/CQtGlCanvasBase.h>

#if MRPT_HAS_Qt5
#include <QMouseEvent>

using namespace mrpt;
using namespace mrpt::gui;

CQtGlCanvasBase::CQtGlCanvasBase(QWidget* parent)
        : QOpenGLWidget(parent),
          mrpt::gui::CGlCanvasBase(),
          m_isPressLMouseButton(false),
          m_isPressRMouseButton(false)
{
        m_mainViewport = getOpenGLSceneRef()->getViewport("main");
        setMouseTracking(true);
}

void CQtGlCanvasBase::initializeGL()
{
        clearColors();

        QOpenGLWidget::initializeGL();
}

void CQtGlCanvasBase::paintGL() { renderCanvas(); }
void CQtGlCanvasBase::resizeGL(int width, int height)
{
        if (height == 0) height = 1;
        glViewport(0, 0, width, height);

        QOpenGLWidget::resizeGL(width, height);
}

opengl::COpenGLViewport::Ptr CQtGlCanvasBase::mainViewport() const
{
        return m_mainViewport;
}

float CQtGlCanvasBase::getCameraZoomDistance() const
{
        mrpt::opengl::CCamera& cam = m_mainViewport->getCamera();
        return cam.getZoomDistance();
}

void CQtGlCanvasBase::mousePressEvent(QMouseEvent* event)
{
        setMousePos(event->pos().x(), event->pos().y());
        setMouseClicked(true);

        m_isPressLMouseButton = (event->button() == Qt::LeftButton);
        m_isPressRMouseButton = (event->button() == Qt::RightButton);

        QOpenGLWidget::mousePressEvent(event);
}

void CQtGlCanvasBase::mouseMoveEvent(QMouseEvent* event)
{
        if (m_isPressLMouseButton ||
                m_isPressRMouseButton)  // QApplication::keyboardModifiers()//
        // event->modifiers() == Qt::ControlModifier
        // Qt::ShiftModifier
        {
                int X = event->pos().x();
                int Y = event->pos().y();
                updateLastPos(X, Y);

                // Proxy variables to cache the changes:
                CamaraParams params = cameraParams();

                if (m_isPressLMouseButton)
                {
                        if (event->modifiers() == Qt::ShiftModifier)
                                updateZoom(params, X, Y);

                        else if (event->modifiers() == Qt::ControlModifier)
                                updateRotate(params, X, Y);

                        else if (event->modifiers() == Qt::NoModifier)
                                updateOrbitCamera(params, X, Y);
                }
                else
                        updatePan(params, X, Y);

                setMousePos(X, Y);
                setCameraParams(params);

                updateCamerasParams();
                update();
        }

        QOpenGLWidget::mouseMoveEvent(event);
}

void CQtGlCanvasBase::mouseReleaseEvent(QMouseEvent* event)
{
        setMouseClicked(false);
        m_isPressLMouseButton = false;
        m_isPressRMouseButton = false;
        QOpenGLWidget::mouseReleaseEvent(event);
}

void CQtGlCanvasBase::wheelEvent(QWheelEvent* event)
{
        CamaraParams params = cameraParams();
        updateZoom(params, event->delta());
        setCameraParams(params);

        updateCamerasParams();

        update();
        QOpenGLWidget::wheelEvent(event);
}

void CQtGlCanvasBase::renderError(const std::string& err_msg)
{
        Q_UNUSED(err_msg);
}

void CQtGlCanvasBase::updateCamerasParams()
{
        mrpt::opengl::CCamera& cam = m_mainViewport->getCamera();
        updateCameraParams(cam);
}

void CQtGlCanvasBase::insertToMap(const opengl::CRenderizable::Ptr& newObject)
{
        assert(m_mainViewport);
        m_mainViewport->insert(newObject);
}

void CQtGlCanvasBase::removeFromMap(const opengl::CRenderizable::Ptr& newObject)
{
        assert(m_mainViewport);
        m_mainViewport->removeObject(newObject);
}

bool CQtGlCanvasBase::isPressLMouseButton() const
{
        return m_isPressLMouseButton;
}

bool CQtGlCanvasBase::isPressRMouseButton() const
{
        return m_isPressRMouseButton;
}

void CQtGlCanvasBase::unpressMouseButtons()
{
        m_isPressLMouseButton = false;
        m_isPressRMouseButton = false;
}

#endif  // MRPT_HAS_Qt5