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qgsgcplistmodel.cpp
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qgsgcplistmodel.cpp
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/***************************************************************************
qgsgcplistmodel.cpp - Model implementation of GCPList Model/View
--------------------------------------
Date : 27-Feb-2009
Copyright : (c) 2009 by Manuel Massing
Email : m.massing at warped-space.de
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
/* $Id */
#include "qgsgcplistmodel.h"
#include "qgsgeorefdatapoint.h"
#include "qgsgeoreftransform.h"
#include <cmath>
using namespace std;
template <class T> class QNumericItem : public QStandardItem {
public:
QNumericItem(T value) : QStandardItem(QString("%1").arg(value)), mValue(value)
{
}
bool operator < (const QStandardItem &other) const
{
const QNumericItem<T> *otherD = dynamic_cast<const QNumericItem<T> *>(&other);
if (otherD == NULL)
return false;
return mValue < otherD->mValue;
}
private:
T mValue;
};
QgsGCPListModel::QgsGCPListModel(QObject *parent) : QStandardItemModel(parent), mGCPList(0), mGeorefTransform(0)
{
}
void QgsGCPListModel::setGCPList(QgsGCPList *theGCPList)
{
mGCPList = theGCPList;
updateModel(true);
}
void QgsGCPListModel::setGeorefTransform(QgsGeorefTransform *theGeorefTransform)
{
mGeorefTransform = theGeorefTransform;
updateModel(true);
}
void QgsGCPListModel::onGCPListModified()
{
}
void QgsGCPListModel::onTransformationModified()
{
}
template <class T> QNumericItem<T> *create_item(const T value, bool isEditable = false)
{
QNumericItem<T> *item = new QNumericItem<T>(value);
item->setEditable(isEditable);
return item;
}
QStandardItem *create_std_item(const QString &S, bool isEditable = false)
{
QStandardItem *std_item = new QStandardItem(S);
std_item->setEditable(isEditable);
return std_item;
}
void QgsGCPListModel::updateModel(bool gcpsDirty)
{
clear();
if (!mGCPList)
return;
// Setup table header
QStringList itemLabels;
// Set column headers
itemLabels<<"id"<<"srcX"<<"srcY"<<"dstX"<<"dstY"<<"dX"<<"dY"<<"residual";
setColumnCount(itemLabels.size());
setHorizontalHeaderLabels(itemLabels);
setRowCount(mGCPList->size());
if (gcpsDirty && mGeorefTransform)
{
vector<QgsPoint> rC, mC;
// TODO: move this vector extraction snippet into QgsGCPList
for (int i = 0; i < mGCPList->size(); i++) {
rC.push_back((*mGCPList)[i]->pixelCoords());
mC.push_back((*mGCPList)[i]->mapCoords());
}
// TODO: the parameters should probable be updated externally (by user interaction)
mGeorefTransform->updateParametersFromGCPs(mC, rC);
}
for (int i = 0; i < mGCPList->size(); i++)
{
int j = 0;
QgsGeorefDataPoint &p = *(*mGCPList)[i];
setItem(i, j++, create_item<int>(i));
setItem(i, j++, create_item<double>( p.pixelCoords().x() ));
setItem(i, j++, create_item<double>(-p.pixelCoords().y() ));
setItem(i, j++, create_item<double>( p.mapCoords().x() ));
setItem(i, j++, create_item<double>( p.mapCoords().y() ));
double residual = -1.f;
double dX, dY;
// Calculate residual if transform is available and up-to-date
if (mGeorefTransform && mGeorefTransform->parametersInitialized())
{
QgsPoint dst;
// Transform from world to raster coordinate:
// This is the transform direction used by the warp operation.
// As transforms of order >=2 are not invertible, we are only
// interested in the residual in this direction
mGeorefTransform->transformWorldToRaster(p.mapCoords(), dst);
dX = (dst.x() - p.pixelCoords().x());
dY = (dst.y() - p.pixelCoords().y());
residual = sqrt(dX*dX + dY*dY);
}
if (residual >= 0.f) {
setItem(i, j++, create_item<double>(dX));
setItem(i, j++, create_item<double>(-dY));
setItem(i, j++, create_item<double>(residual));
}
else {
setItem(i, j++, create_std_item("n/a"));
setItem(i, j++, create_std_item("n/a"));
setItem(i, j++, create_std_item("n/a"));
}
}
//sort(); // Sort data
//reset(); // Signal to views that the model has changed
}