cxViewContainerItem.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
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   may be used to endorse or promote products derived from this software
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#include "cxViewContainerItem.h"

#include <QApplication>
#include <QDesktopWidget>
#include "vtkRenderer.h"
#include "cxBoundingBox3D.h"
#include "cxViewLinkingViewContainerItem.h"

namespace cx
{

ViewItem::ViewItem(QString uid, QString name, QWidget *parent, vtkRenderWindowPtr renderWindow, QRect rect) :
        QObject(parent),
        mGeometry(rect),
        mParent(parent)
{
        mZoomFactor = -1.0;
        mView = ViewLinkingViewContainerItem::create(this, renderWindow);
        mView->clear();
}

ViewItem::~ViewItem()
{
}

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

void ViewItem::setGeometry(const QRect &r)
{
        mGeometry = r;
        QSize parentSize = mParent->size();
        double xMin = r.left()/(double)parentSize.width();
        double xMax = (r.right() + 1)/(double)parentSize.width();
        double yMin = (parentSize.height() - r.bottom() - 1) / (double)parentSize.height();
        double yMax = (parentSize.height() - r.top()) / (double)parentSize.height();
        this->getView()->getRenderer()->SetViewport(xMin, yMin, xMax, yMax);
        emit resized(r.size());
}

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

Transform3D ViewItem::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 ViewItem::getViewport() const
{
        return DoubleBoundingBox3D(0, size().width(), 0, size().height(), 0, 0);
}

double ViewItem::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(mParent));
        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 */