cxViewWidget.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.
                 
Copyright (c) SINTEF Department of Medical Technology.
All rights reserved.
                 
CustusX is released under a BSD 3-Clause license.
                 
See Lisence.txt (https://github.com/SINTEFMedtek/CustusX/blob/master/License.txt) for details.
=========================================================================*/

#include "cxViewWidget.h"

#include <QResizeEvent>
#include <QApplication>
#include <QDesktopWidget>
#include "vtkRenderWindow.h"
#include "cxBoundingBox3D.h"
#include "cxViewLinkingViewWidget.h"
#include "cxTypeConversions.h"
#include "cxGLHelpers.h"
#include "cxOSXHelper.h"
#include "cxRenderWindowFactory.h"

namespace cx
{

ViewWidget::ViewWidget(RenderWindowFactoryPtr factory, const QString& uid, const QString& name, QWidget *parent, Qt::WindowFlags f) :
        inherited(parent, f)
{
        mMTimeHash = 0;
        this->setContextMenuPolicy(Qt::CustomContextMenu);
        mZoomFactor = -1.0;
        vtkRenderWindowPtr rw = factory->getRenderWindow(uid);
        mView = ViewLinkingViewWidget::create(this, rw);
        connect(this, SIGNAL(customContextMenuRequested(const QPoint &)), this, SLOT(customContextMenuRequestedSlot(const QPoint &)));
        vtkRenderWindowPtr renderWindow = mView->getRenderWindow();
        this->SetRenderWindow(renderWindow);
        mView->getRenderWindow()->GetInteractor()->EnableRenderOff();
        mView->clear();
        disableGLHiDPI(this->winId());
}

void ViewWidget::customContextMenuRequestedSlot(const QPoint& point)
{
        QWidget* sender = dynamic_cast<QWidget*>(this->sender());
        QPoint pointGlobal = sender->mapToGlobal(point);
        emit customContextMenuRequestedInGlobalPos(pointGlobal);
}

ViewRepCollectionPtr ViewWidget::getView()
{
        return mView;
}

ViewWidget::~ViewWidget()
{
        this->getView()->clear();
}

vtkRendererPtr ViewWidget::getRenderer()
{
        return this->getView()->getRenderer();
}

void ViewWidget::render()
{
        // Render is called only when mtime is changed.
        // At least on MaxOS, this is not done automatically.
        unsigned long hash = mView->computeTotalMTime();

        if (hash != mMTimeHash)
        {
                this->getRenderWindow()->Render();
                mMTimeHash = hash;

                QString msg("During rendering of view: " + this->getView()->getName());
                report_gl_error_text(cstring_cast(msg));
        }
}

void ViewWidget::resizeEvent(QResizeEvent * event)
{
        inherited::resizeEvent(event);
        QSize size = event->size();
        vtkRenderWindowInteractor* iren = mView->getRenderWindow()->GetInteractor();
        if (iren != NULL)
                iren->UpdateSize(size.width(), size.height());
        emit resized(size);
}

void ViewWidget::mouseMoveEvent(QMouseEvent* event)
{
        inherited::mouseMoveEvent(event);
        emit mouseMove(event->x(), event->y(), event->buttons());
}

void ViewWidget::mousePressEvent(QMouseEvent* event)
{
        // special case for CustusX: when context menu is opened, mousereleaseevent is never called.
        // this sets the render interactor in a zoom state after each menu call. This hack prevents
        // the mouse press event in this case.
        if ((this->contextMenuPolicy() == Qt::CustomContextMenu) && event->buttons().testFlag(Qt::RightButton))
                return;

        inherited::mousePressEvent(event);
        emit mousePress(event->x(), event->y(), event->buttons());
}

void ViewWidget::mouseReleaseEvent(QMouseEvent* event)
{
        inherited::mouseReleaseEvent(event);
        emit mouseRelease(event->x(), event->y(), event->buttons());
}

void ViewWidget::focusInEvent(QFocusEvent* event)
{
        inherited::focusInEvent(event);
        emit focusChange(event->gotFocus(), event->reason());
}

void ViewWidget::wheelEvent(QWheelEvent* event)
{
        inherited::wheelEvent(event);
        emit mouseWheel(event->x(), event->y(), event->delta(), event->orientation(), event->buttons());
}

void ViewWidget::showEvent(QShowEvent* event)
{
        inherited::showEvent(event);
        emit shown();
}

void ViewWidget::paintEvent(QPaintEvent* event)
{
        mView->setModified();
        inherited::paintEvent(event);
}

void ViewWidget::setZoomFactor(double factor)
{
        if (similar(factor, mZoomFactor))
        {
                return;
        }
        mZoomFactor = factor;
        emit resized(this->size());
}

double ViewWidget::getZoomFactor() const
{
        return mZoomFactor;
}

DoubleBoundingBox3D ViewWidget::getViewport_s() const
{
        return transform(this->get_vpMs().inv(), this->getViewport());
}

Transform3D ViewWidget::get_vpMs() const
{
        Vector3D center_vp = this->getViewport().center();
        double scale = mZoomFactor / this->mmPerPix(); // double zoomFactor = 0.3; // real magnification
        Transform3D S = createTransformScale(Vector3D(scale, scale, scale));
        Transform3D T = createTransformTranslate(center_vp);// center of viewport in viewport coordinates
        Transform3D M_vp_w = T * S; // first scale , then translate to center.
        return M_vp_w;
}

DoubleBoundingBox3D ViewWidget::getViewport() const
{
        return DoubleBoundingBox3D(0, size().width(), 0, size().height(), 0, 0);
}

double ViewWidget::mmPerPix() const
{
        // use mean mm/pix over entire screen. DONT use the height of the widget in mm,
        // this is truncated to the nearest integer.
        QDesktopWidget* desktop = dynamic_cast<QApplication*>(QApplication::instance())->desktop();
        QWidget* screen = desktop->screen(desktop->screenNumber(this));
        double r_h = (double) screen->heightMM() / (double) screen->geometry().height();
        double r_w = (double) screen->widthMM() / (double) screen->geometry().width();
        double retval = (r_h + r_w) / 2.0;
        return retval;
}

} // namespace cx