cxLayoutData.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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   may be used to endorse or promote products derived from this software 
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#include "cxLayoutData.h"
#include <iostream>
#include <QDomElement>
#include "cxTypeConversions.h"
#include "cxLogger.h"
#include "cxDefinitionStrings.h"
#include "cxView.h"

namespace cx
{

LayoutRegion merge(LayoutRegion a, LayoutRegion b)
{
        if (a.pos.col<0 || a.pos.row<0)
                return b;
        if (b.pos.col<0 || b.pos.row<0)
                return a;

        int r1 = std::min(a.pos.row, b.pos.row);
        int c1 = std::min(a.pos.col, b.pos.col);
        int r2 = std::max(a.pos.row + a.span.row - 1, b.pos.row + b.span.row - 1);
        int c2 = std::max(a.pos.col + a.span.col - 1, b.pos.col + b.span.col - 1);
        return LayoutRegion(r1, c1, r2 - r1 + 1, c2 - c1 + 1);
}

void LayoutViewData::addXml(QDomNode node) const
{
        QDomElement elem = node.toElement();
        elem.setAttribute("group", qstring_cast(mGroup));
        elem.setAttribute("type", qstring_cast(mPlane));
        elem.setAttribute("view", qstring_cast(mType));
        elem.setAttribute("row", qstring_cast(mRegion.pos.row));
        elem.setAttribute("col", qstring_cast(mRegion.pos.col));
        elem.setAttribute("rowSpan", qstring_cast(mRegion.span.row));
        elem.setAttribute("colSpan", qstring_cast(mRegion.span.col));
}

void LayoutViewData::parseXml(QDomNode node)
{
        QDomElement elem = node.toElement();
        mGroup = elem.attribute("group").toInt();
        mPlane = string2enum<PLANE_TYPE> (elem.attribute("type"));
        //  mType = string2enum<View::Type>(elem.attribute("view"));
        mType = static_cast<View::Type> (elem.attribute("view").toInt());
        mRegion.pos.row = elem.attribute("row").toInt();
        mRegion.pos.col = elem.attribute("col").toInt();
        mRegion.span.row = elem.attribute("rowSpan").toInt();
        mRegion.span.col = elem.attribute("colSpan").toInt();
}

LayoutData LayoutData::createHeader(QString uid, QString name)
{
        return create(uid, name, 0, 0);
}

LayoutData LayoutData::create(QString uid, QString name, int rows, int cols)
{
        LayoutData retval;
        retval.resetUid(uid);
        retval.setName(name);
        retval.resize(rows, cols);
        return retval;
}

LayoutData::LayoutData() :
        mName("unnamed")
{
        mSize = LayoutPosition(0, 0);
        this->resize(0, 0);
}

void LayoutData::resetUid(const QString& uid)
{
        mUid = uid;
        mName = mName + " " + uid;
}

void LayoutData::setView(int group, PLANE_TYPE type, LayoutRegion region)
{
        if (!this->merge(region))
                return;
        LayoutViewData& view = get(region.pos);
        view.mGroup = group;
        view.mPlane = type;
        view.mType = View::VIEW_2D;
}

void LayoutData::setView(int group, View::Type type, LayoutRegion region)
{
        if (!this->merge(region))
                return;
        LayoutViewData& view = get(region.pos);
        view.mGroup = group;
        view.mPlane = ptNOPLANE;
        view.mType = type;
}

bool LayoutData::merge(LayoutRegion region)
{
        if (region.pos.row + region.span.row > mSize.row || region.pos.col + region.span.col > mSize.col)
        {
                reportError("Attempted to merge a region outside allocated space in LayoutData.");
                return false;
        }

        //std::cout << "merge views " << std::endl;
        this->split(region); // split all existing merges in order to keep consistency

        // create new merged view based on the ul corner view.
        LayoutViewData current = this->get(region.pos);
        current.mRegion = region;

        // erase all views within region (all should now be 1x1)
        for (int r = region.pos.row; r < region.pos.row + region.span.row; ++r)
        {
                for (int c = region.pos.col; c < region.pos.col + region.span.col; ++c)
                {
                        iterator iter = this->find(LayoutPosition(r, c));
                        if (iter != this->end())
                                mView.erase(iter);
                }
        }

        // add merged view.
        mView.push_back(current);
        return true;
}

void LayoutData::split(LayoutRegion region)
{
        // reset all primitives in region
        for (int r = region.pos.row; r < region.pos.row + region.span.row; ++r)
        {
                for (int c = region.pos.col; c < region.pos.col + region.span.col; ++c)
                {
                        iterator iter = this->find(LayoutPosition(r, c));
                        this->split(iter);
                }
        }
}

void LayoutData::split(iterator iter)
{
        if (iter == this->end())
                return;
        if (iter->mRegion.span.row == 1 && iter->mRegion.span.col == 1)
                return; // nothing to split

        LayoutViewData newView = *iter;
        LayoutRegion region = iter->mRegion;

        // erase old region
        mView.erase(iter);

        // insert new 1x1 views in the erased region.
        for (int r = region.pos.row; r < region.pos.row + region.span.row; ++r)
        {
                for (int c = region.pos.col; c < region.pos.col + region.span.col; ++c)
                {
                        newView.mRegion = LayoutRegion(r, c, 1, 1);
                        mView.push_back(newView);
                }
        }
}

void LayoutData::resize(int rows, int cols)
{
        mSize = LayoutPosition(rows, cols);

        if (mSize.row == 0 || mSize.col == 0)
        {
                mView.clear();
                return;
        }

        // erase all views outside region
        // TODO: also consider nontrivial regions.
        for (iterator iter = this->begin(); iter != this->end();)
        {
                if (iter->mRegion.pos.row >= rows || iter->mRegion.pos.col >= cols)
                {
                        iter = mView.erase(iter);
                }
                else
                {
                        ++iter;
                }
        }

        // add new views (brute force: optimize if needed)
        for (int r = 0; r < rows; ++r)
        {
                for (int c = 0; c < cols; ++c)
                {
                        if (this->find(LayoutPosition(r, c)) == this->end())
                        {
                                mView.push_back(LayoutViewData(r, c, 1, 1));
                        }
                }
        }
}

//const LayoutData::ViewData& LayoutData::get(LayoutPosition pos) const
//{
//  return *(this->find(pos));
//}

LayoutViewData& LayoutData::get(LayoutPosition pos)
{
        return *(this->find(pos));
}

LayoutData::iterator LayoutData::find(LayoutPosition pos)
{
        for (iterator iter = this->begin(); iter != this->end(); ++iter)
        {
                if (iter->mRegion.contains(pos))
                        return iter;
        }

        return this->end();
}

void LayoutData::addXml(QDomNode node) const
{
        QDomDocument doc = node.ownerDocument();
        QDomElement elem = node.toElement();

        elem.setAttribute("uid", mUid);
        elem.setAttribute("name", mName);

        QDomElement size = doc.createElement("size");
        size.setAttribute("row", mSize.row);
        size.setAttribute("col", mSize.col);
        elem.appendChild(size);

        for (const_iterator iter = this->begin(); iter != this->end(); ++iter)
        {
                QDomElement view = doc.createElement("view");
                iter->addXml(view);
                elem.appendChild(view);
        }
}

void LayoutData::parseXml(QDomNode node)
{
        if (node.isNull())
                return;

        QDomElement elem = node.toElement();
        mUid = elem.attribute("uid");
        mName = elem.attribute("name");

        QDomElement size = elem.namedItem("size").toElement();
        mSize.row = size.attribute("row").toInt();
        mSize.col = size.attribute("col").toInt();

        mView.clear();
        // iterate over all views
        QDomElement currentElem = elem.firstChildElement("view");
        for (; !currentElem.isNull(); currentElem = currentElem.nextSiblingElement("view"))
        {
                LayoutViewData viewData;
                viewData.parseXml(currentElem);
                mView.push_back(viewData);
        }
}

} // namespace cx