cxMetricNamesRep.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
All rights reserved.

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modification, are permitted provided that the following conditions are met:

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   this list of conditions and the following disclaimer.

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   and/or other materials provided with the distribution.

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   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
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=========================================================================*/
#include "cxMetricNamesRep.h"

#include <vtkRenderer.h>
#include <vtkActor2D.h>
#include <vtkTextProperty.h>
#include <vtkTextMapper.h>
#include <QTimer>

#include "cxView.h"
#include "cxVtkHelperClasses.h"
#include "cxTypeConversions.h"
#include "cxDataMetric.h"
#include "cxLogger.h"


namespace cx
{

MetricNamesRep::MetricNamesRep():
        RepImpl()
{
        mFontSize = 20;
}

MetricNamesRep::~MetricNamesRep()
{
}

MetricNamesRepPtr MetricNamesRep::New(const QString& uid)
{
        return wrap_new(new MetricNamesRep(), uid);
}

void MetricNamesRep::addRepActorsToViewRenderer(ViewPtr view)
{
        for(unsigned i =0; i<mDisplayText.size(); ++i)
        {
                mDisplayText[i]->setRenderer(view->getRenderer());
        }
}

void MetricNamesRep::removeRepActorsFromViewRenderer(ViewPtr view)
{
        for(unsigned i =0; i<mDisplayText.size(); ++i)
        {
                mDisplayText[i]->setRenderer(NULL);
        }
}

void MetricNamesRep::setData(std::vector<DataPtr> data)
{
        std::vector<DataMetricPtr> metrics = this->convertToMetrics(data);

        if (this->equal(metrics, mMetrics))
                return;

        for (unsigned i=0; i<mMetrics.size(); ++i)
        {
                disconnect(mMetrics[i].get(), SIGNAL(transformChanged()), this, SLOT(setModified()));
                disconnect(mMetrics[i].get(), SIGNAL(propertiesChanged()), this, SLOT(setModified()));
        }

        mMetrics = metrics;

        for (unsigned i=0; i<mMetrics.size(); ++i)
        {
                connect(mMetrics[i].get(), SIGNAL(transformChanged()), this, SLOT(setModified()));
                connect(mMetrics[i].get(), SIGNAL(propertiesChanged()), this, SLOT(setModified()));
        }

        this->callSetColoredTextListSlot();
        // Call again with a small delay, as the view might not be ready yet. I.e. the bounding box of the corner text is not properly initialized.
        // Need the second call to avoid some assertion.
        QTimer::singleShot(500, this, &MetricNamesRep::callSetColoredTextListSlot);
}

void MetricNamesRep::callSetColoredTextListSlot()
{
        this->setColoredTextList(this->getAllMetricTexts(), Eigen::Array2d(0.98, 0.98));
}

std::vector<DataMetricPtr> MetricNamesRep::convertToMetrics(std::vector<DataPtr> data)
{
        std::vector<DataMetricPtr> metrics;
        for (unsigned i=0; i<data.size(); ++i)
        {
                DataMetricPtr metric = boost::dynamic_pointer_cast<DataMetric>(data[i]);
                if (metric)
                        metrics.push_back(metric);
        }
        return metrics;
}

bool MetricNamesRep::equal(std::vector<DataMetricPtr> a, std::vector<DataMetricPtr> b) const
{
        if (a.size()!=b.size())
                return false;
        for (unsigned i=0; i<a.size(); ++i)
                if (a[i] != b[i])
                        return false;
        return true;
}

void MetricNamesRep::onModifiedStartRender()
{
        std::vector<std::pair<QColor, QString> > text;
        text = this->getAllMetricTexts();
        CX_ASSERT(text.size()==mDisplayText.size());

        for (unsigned i=0; i<mDisplayText.size(); ++i)
        {
                mDisplayText[i]->updateText(text[i].second);
                mDisplayText[i]->setColor(text[i].first);
        }

}

void MetricNamesRep::setColoredTextList(std::vector<std::pair<QColor, QString> > text, Eigen::Array2d pos, vtkViewport *vp)
{
        mDisplayText.clear();

        if (vp==0)
        {
                vp = this->getRenderer();
        }
//      if (vp==0)
//      {
//              return;
//      }

        DoubleBoundingBox3D bb;
        bb = this->findNormalizedBoundingBoxAroundText(text, pos, vp);
        double meanHeight = bb.range()[1]/text.size();

        for (unsigned i=0; i<text.size(); ++i)
        {
                TextDisplayPtr rep;
                rep.reset( new TextDisplay( text[i].second, text[i].first,      mFontSize) );
                rep->textProperty()->SetJustificationToLeft();
                rep->getActor()->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();

                Vector3D currentPos = bb.bottomLeft() + (meanHeight*i)*Eigen::Vector3d::UnitY();
                rep->setPosition(currentPos);
                rep->setRenderer(this->getRenderer());

                mDisplayText.push_back(rep);
        }
}

DoubleBoundingBox3D MetricNamesRep::findNormalizedBoundingBoxAroundText(std::vector<std::pair<QColor, QString> > text, Eigen::Array2d pos, vtkViewport *vp)
{
        QStringList fullText;
        for (unsigned i=0; i<text.size(); ++i)
                fullText << text[i].second;
        TextDisplay test(fullText.join("\n"), QColor(Qt::red), mFontSize);
        test.textProperty()->SetJustificationToLeft();
        double width_p = test.getMapper()->GetWidth(vp);
        double height_p = test.getMapper()->GetHeight(vp);
        height_p *= 1.1; // increase spacing

        Eigen::Array2i size_vp(vp->GetSize());
        Eigen::Array2d normsize_box(width_p/size_vp[0], height_p/size_vp[1]);

        // move box into viewport:
        double border = 0.02;
        DoubleBoundingBox3D bb_vp(border, 1.0-border, border, 1.0-border, 0, 0);
        DoubleBoundingBox3D bb_box(pos[0], pos[0]+normsize_box[0], pos[1], pos[1]+normsize_box[1], 0, 0);
        bb_box = this->moveBoxIntoAnother(bb_box, bb_vp);

        return bb_box;
}

DoubleBoundingBox3D MetricNamesRep::moveBoxIntoAnother(DoubleBoundingBox3D box, DoubleBoundingBox3D another)
{
        // move negative direction
        for (unsigned i=0; i<2; ++i)
        {
                double shift = another[2*i+1] - box[2*i+1];
                if (shift < 0)
                {
                        box[2*i] += shift;
                        box[2*i+1] += shift;
                }
        }

        // move positive direction
        for (unsigned i=0; i<3; ++i)
        {
                double shift = another[2*i] - box[2*i];
                if (shift > 0)
                {
                        box[2*i] -= shift;
                        box[2*i+1] -= shift;
                }
        }

        return box;
}

void MetricNamesRep::setFontSize(int size)
{
        mFontSize = size;
}

QString MetricNamesRep::getText(DataMetricPtr metric, bool showLabel) const
{
        QStringList text;
        if (showLabel)
                text << metric->getName();
        if (metric->showValueInGraphics())
                text << metric->getValueAsString();
        return text.join(" = ");
}

std::vector<std::pair<QColor, QString> > MetricNamesRep::getAllMetricTexts() const
{
        std::vector<std::pair<QColor, QString> > retval;

        for (unsigned i = 0; i < mMetrics.size(); ++i)
        {
                DataMetricPtr metric = mMetrics[i];
                QString line = metric->getName();

                if (!metric->showValueInGraphics())
                        continue;

                QString text = this->getText(metric, true);
                retval.push_back(std::make_pair(metric->getColor(), text));
        }
        std::reverse(retval.begin(), retval.end());
        return retval;
}


} // namespace cx