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qgsgrassnewmapset.cpp
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qgsgrassnewmapset.cpp
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/***************************************************************************
qgsgrassnewmapset.cpp - New GRASS mapset wizard
-------------------
begin : October, 2005
copyright : (C) 2005 by Radim Blazek
email : radim.blazek@gmail.it
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <iostream>
#include <qdir.h>
#include <qevent.h>
#include <qfile.h>
#include <QFileDialog>
#include <qfileinfo.h>
#include <qsettings.h>
#include <q3listbox.h>
#include <qstringlist.h>
#include <qlabel.h>
#include <QComboBox>
#include <qspinbox.h>
#include <qmessagebox.h>
#include <qinputdialog.h>
#include <qcursor.h>
#include <q3listview.h>
#include <q3header.h>
#include <qradiobutton.h>
#include <qlayout.h>
#include <qpainter.h>
#include <qpixmap.h>
#include <qpen.h>
#include <qdom.h>
#include <qpushbutton.h>
#include <q3textbrowser.h>
#include <qapplication.h>
//Added by qt3to4:
#include <QKeyEvent>
#include <QTextStream>
#include <QGridLayout>
#include <QCloseEvent>
#include <Q3Wizard>
#include "qgis.h"
#include "qgisinterface.h"
#include "qgsapplication.h"
#include "qgsmapcanvas.h"
#include "qgsproject.h"
#include "qgsrect.h"
#include "qgscoordinatetransform.h"
#include "qgsspatialrefsys.h"
#include "qgsprojectionselector.h"
#include "../../src/providers/grass/qgsgrass.h"
#include "qgsgrassnewmapset.h"
// For bug in GPJ_osr_to_grass()
#include "grass/version.h"
// Prevents some compiler warnings from the version.h include
#ifndef GRASS_VERSION_RELEASE
// When using newer version of GRASS (cvs >= 26.4.2007),
// these variables are #defined instead of being static variables.
QString temp1(GRASS_VERSION_STRING);
QString temp2(GRASS_VERSION_MAJOR);
QString temp3(GRASS_VERSION_MINOR);
QString temp4(GRASS_VERSION_RELEASE);
#endif
#if defined(WIN32)
#include <windows.h>
static QString getShortPath(const QString &path)
{
TCHAR buf[MAX_PATH];
GetShortPathName( path.ascii(), buf, MAX_PATH);
return buf;
}
#endif
bool QgsGrassNewMapset::mRunning = false;
QgsGrassNewMapset::QgsGrassNewMapset ( QgisInterface *iface,
QgsGrassPlugin *plugin, QWidget * parent,
const char * name, Qt::WFlags f ) :
Q3Wizard(parent, name, false, f),
QgsGrassNewMapsetBase ( )
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset()" << std::endl;
#endif
setupUi(this);
mRunning = true;
mIface = iface;
mProjectionSelector = 0;
mPreviousPage = -1;
mRegionModified = false;
QString mapPath = QgsApplication::pkgDataPath() + "/grass/world.png";
#ifdef QGISDEBUG
std::cerr << "mapPath = " << mapPath.ascii() << std::endl;
#endif
//mPixmap = QPixmap( *(mRegionMap->pixmap()) );
mPixmap.load ( mapPath );
std::cerr << "mPixmap.isNull() = " << mPixmap.isNull() << std::endl;
mRegionsInited = false;
mPlugin = plugin;
setHelpEnabled ( page(DATABASE), false );
setHelpEnabled ( page(LOCATION), false );
setHelpEnabled ( page(PROJECTION), false );
setHelpEnabled ( page(REGION), false );
setHelpEnabled ( page(MAPSET), false );
setHelpEnabled ( page(FINISH), false );
setTitle ( page(DATABASE), tr("GRASS database") );
setTitle ( page(LOCATION), tr("GRASS location") );
setTitle ( page(PROJECTION), tr("Projection") );
setTitle ( page(REGION), tr("Default GRASS Region") );
setTitle ( page(MAPSET), tr("Mapset") );
setTitle ( page(FINISH), tr("Create New Mapset") );
setError ( mDatabaseErrorLabel, "" );
setError ( mLocationErrorLabel, "" );
setError ( mProjErrorLabel, "" );
setError ( mRegionErrorLabel, "" );
setError ( mMapsetErrorLabel, "" );
mDatabaseText->setPaletteBackgroundColor ( paletteBackgroundColor() );
mLocationText->setPaletteBackgroundColor ( paletteBackgroundColor() );
mRegionText->setPaletteBackgroundColor ( paletteBackgroundColor() );
mMapsetText->setPaletteBackgroundColor ( paletteBackgroundColor() );
// DATABASE
QSettings settings;
QString db = settings.readEntry("/GRASS/lastGisdbase");
if ( !db.isNull() )
{
mDatabaseLineEdit->setText( db );
}
else
{
mDatabaseLineEdit->setText( QDir::currentDirPath() );
}
databaseChanged();
// Create example tree structure
mTreeListView->clear();
mTreeListView->setSortColumn(-1); // No sorting
mTreeListView->setColumnText( 0, tr("Tree") );
mTreeListView->addColumn( tr("Comment") );
Q3ListViewItem *dbi = new Q3ListViewItem( mTreeListView, "OurDatabase", tr("Database") );
dbi->setOpen(true);
// First inserted is last in the view
Q3ListViewItem *l = new Q3ListViewItem( dbi, "New Zealand", tr("Location 2") );
l->setOpen(true);
Q3ListViewItem *m = new Q3ListViewItem( l, "Cimrman", tr("User's mapset") );
m->setOpen(true);
m = new Q3ListViewItem( l, "PERMANENT", tr("System mapset") );
m->setOpen(true);
l = new Q3ListViewItem( dbi, "Mexico", tr("Location 1") );
m->setOpen(true);
m = new Q3ListViewItem( l, "Juan", tr("User's mapset") );
l->setOpen(true);
m = new Q3ListViewItem( l, "Alejandra", tr("User's mapset") );
m->setOpen(true);
m = new Q3ListViewItem( l, "PERMANENT", tr("System mapset") );
m->setOpen(true);
// PROJECTION
// MAPSET
mMapsetsListView->clear();
mMapsetsListView->setColumnText( 0, tr("Mapset") );
mMapsetsListView->addColumn( tr("Owner") );
// FINISH
setFinishEnabled ( page(FINISH), true );
connect( this, SIGNAL(selected(const QString &)),
this, SLOT(pageSelected(const QString &)));
}
QgsGrassNewMapset::~QgsGrassNewMapset()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::~QgsGrassNewMapset()" << std::endl;
#endif
mRunning = false;
}
/*************************** DATABASE *******************************/
void QgsGrassNewMapset::browseDatabase()
{
// TODO: unfortunately QFileDialog does not support 'new' directory
QFileDialog *fd = new QFileDialog ( this, NULL, mDatabaseLineEdit->text() );
fd->setMode ( QFileDialog::DirectoryOnly );
if ( fd->exec() == QDialog::Accepted )
{
mDatabaseLineEdit->setText( fd->selectedFile() );
databaseChanged();
}
}
void QgsGrassNewMapset::databaseChanged()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::databaseChanged()" << std::endl;
#endif
// TODO: reset next tabs
//
QSettings settings;
settings.writeEntry("/GRASS/lastGisdbase", mDatabaseLineEdit->text() );
setNextEnabled ( page(DATABASE), false );
setError ( mDatabaseErrorLabel, "" );
QString database = mDatabaseLineEdit->text().trimmed();
if ( database.length() == 0 )
{
setError ( mDatabaseErrorLabel, tr("Enter path to GRASS database") );
return;
}
QFileInfo databaseInfo ( mDatabaseLineEdit->text() );
if ( !databaseInfo.exists() )
{
setError ( mDatabaseErrorLabel, tr("The directory doesn't exist!") );
return;
}
// Check if at least one writable location exists or
// database is writable
bool locationExists = false;
QDir d ( mDatabaseLineEdit->text() );
for ( unsigned int i = 0; i < d.count(); i++ )
{
if ( d[i] == "." || d[i] == ".." ) continue;
QString windName = mDatabaseLineEdit->text() + "/" + d[i] + "/PERMANENT/DEFAULT_WIND";
QString locationName = mDatabaseLineEdit->text() + "/" + d[i];
QFileInfo locationInfo ( locationName );
if ( QFile::exists ( windName ) && locationInfo.isWritable () )
{
locationExists = true;
break;
}
}
if ( locationExists || databaseInfo.isWritable() )
{
setNextEnabled ( page(DATABASE), true );
}
else
{
setError ( mDatabaseErrorLabel, tr("No writable "
"locations, the database not writable!") );
}
}
/*************************** LOCATION *******************************/
void QgsGrassNewMapset::setLocationPage ( )
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::setLocationPage" << std::endl;
#endif
setLocations();
}
void QgsGrassNewMapset::setLocations ( )
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::setLocations" << std::endl;
#endif
mLocationComboBox->clear();
QSettings settings;
QString lastLocation = settings.readEntry("/GRASS/lastLocation");
// Get available locations with write permissions
QDir d ( mDatabaseLineEdit->text() );
// Add all subdirs containing PERMANENT/DEFAULT_WIND
int idx = 0;
int sel = -1;
for ( unsigned int i = 0; i < d.count(); i++ )
{
if ( d[i] == "." || d[i] == ".." ) continue;
QString windName = mDatabaseLineEdit->text() + "/" + d[i] + "/PERMANENT/DEFAULT_WIND";
QString locationName = mDatabaseLineEdit->text() + "/" + d[i];
QFileInfo locationInfo ( locationName );
if ( QFile::exists ( windName ) && locationInfo.isWritable () )
{
mLocationComboBox->insertItem ( QString ( d[i] ), -1 );
if ( QString ( d[i] ) == lastLocation ) {
sel = idx;
}
idx++;
}
}
if ( sel >= 0 ) {
mLocationComboBox->setCurrentItem(sel);
}
if ( mLocationComboBox->count() == 0 )
{
mCreateLocationRadioButton->setChecked (true);
mSelectLocationRadioButton->setEnabled(false);
}
else
{
mSelectLocationRadioButton->setEnabled(true);
}
locationRadioSwitched(); // calls also checkLocation()
}
void QgsGrassNewMapset::locationRadioSwitched()
{
if ( mSelectLocationRadioButton->isChecked() )
{
mLocationComboBox->setEnabled(true);
mLocationLineEdit->setEnabled(false);
setAppropriate ( page(PROJECTION), false );
setAppropriate ( page(REGION), false );
}
else
{
mLocationComboBox->setEnabled(false);
mLocationLineEdit->setEnabled(true);
setAppropriate ( page(PROJECTION), true );
setAppropriate ( page(REGION), true );
}
checkLocation();
}
void QgsGrassNewMapset::checkLocation()
{
setError ( mLocationErrorLabel, "");
setNextEnabled ( page(LOCATION), true );
if ( mCreateLocationRadioButton->isChecked() )
{
// TODO?: Check spaces in the name
QString location = mLocationLineEdit->text().trimmed();
if ( location.length() == 0 )
{
setNextEnabled ( page(LOCATION), false );
setError ( mLocationErrorLabel, tr("Enter location name!") );
}
else
{
QDir d ( mDatabaseLineEdit->text() );
for ( unsigned int i = 0; i < d.count(); i++ )
{
if ( d[i] == "." || d[i] == ".." ) continue;
if ( d[i] == location )
{
setNextEnabled ( page(LOCATION), false );
setError ( mLocationErrorLabel, tr("The location exists!") );
break;
}
}
}
}
}
void QgsGrassNewMapset::existingLocationChanged(const QString &text )
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::existingLocationChanged()" << std::endl;
#endif
}
void QgsGrassNewMapset::newLocationChanged()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::newLocationChanged()" << std::endl;
#endif
checkLocation();
}
/************************** PROJECTION ******************************/
void QgsGrassNewMapset::setProjectionPage()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::setProjectionPage()" << std::endl;
#endif
setGrassProjection();
}
void QgsGrassNewMapset::sridSelected(QString theSRID)
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::sridSelected()" << std::endl;
#endif
projectionSelected();
}
void QgsGrassNewMapset::projectionSelected()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::projectionSelected()" << std::endl;
#endif
setGrassProjection();
}
void QgsGrassNewMapset::projRadioSwitched()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::projRadioSwitched" << std::endl;
#endif
if ( mNoProjRadioButton->isChecked() )
{
mProjectionSelector->setEnabled ( false );
} else {
mProjectionSelector->setEnabled ( true );
}
projectionSelected();
}
void QgsGrassNewMapset::setGrassProjection()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::setGrassProjection()" << std::endl;
#endif
setError ( mProjErrorLabel, "");
QString proj4 = mProjectionSelector->getCurrentProj4String();
// Not defined
if ( mNoProjRadioButton->isChecked() )
{
mCellHead.proj = PROJECTION_XY;
mCellHead.zone = 0;
mProjInfo = 0;
mProjUnits = 0;
setNextEnabled ( page(PROJECTION), true );
return;
}
// Define projection
if ( !proj4.isNull() )
{
#ifdef QGISDEBUG
std::cerr << "proj4 = " << proj4.local8Bit().data() << std::endl;
#endif
OGRSpatialReferenceH hSRS = NULL;
hSRS = OSRNewSpatialReference(NULL);
int errcode;
const char *oldlocale = setlocale(LC_ALL, NULL);
setlocale(LC_ALL, "C");
errcode = OSRImportFromProj4(hSRS, proj4.ascii());
setlocale(LC_ALL, oldlocale);
if ( errcode!=OGRERR_NONE )
{
std::cerr << "OGR can't parse PROJ.4-style parameter string:\n" << proj4.ascii()
<< "\nOGR Error code was " << errcode << std::endl;
mCellHead.proj = PROJECTION_XY;
mCellHead.zone = 0;
mProjInfo = 0;
mProjUnits = 0;
}
else
{
#ifdef QGISDEBUG
std::cerr << "OSRIsGeographic = " << OSRIsGeographic( hSRS ) << std::endl;
std::cerr << "OSRIsProjected = " << OSRIsProjected( hSRS ) << std::endl;
char *wkt = NULL;
if ((errcode = OSRExportToWkt(hSRS, &wkt)) != OGRERR_NONE)
{
std::cerr << "OGR can't get WKT-style parameter string\n"
<< "OGR Error code was " << errcode << std::endl;
}
else
{
std::cerr << "wkt = " << wkt << std::endl;
}
#endif
int ret;
// Note: GPJ_osr_to_grass() defaults in PROJECTION_XY if projection
// cannot be set
// There was a bug in GRASS, it is present in 6.0.x line
#if GRASS_VERSION_MAJOR == 6 && GRASS_VERSION_MINOR >= 1
ret = GPJ_osr_to_grass ( &mCellHead, &mProjInfo,
&mProjUnits, hSRS, 0);
#else
// Buggy version:
ret = GPJ_osr_to_grass ( &mCellHead, &mProjInfo,
&mProjUnits, (void **)hSRS, 0);
#endif
// Note: It seems that GPJ_osr_to_grass()returns always 1,
// -> test if mProjInfo was set
#ifdef QGISDEBUG
std::cerr << "ret = " << ret << std::endl;
std::cerr << "mProjInfo = " << mProjInfo << std::endl;
#endif
}
if ( !mProjInfo || !mProjUnits )
{
setError ( mProjErrorLabel, tr("Selected projection is not supported by GRASS!") );
}
}
else // Nothing selected
{
mCellHead.proj = PROJECTION_XY;
mCellHead.zone = 0;
mProjInfo = 0;
mProjUnits = 0;
}
if ( mProjInfo && mProjUnits )
{
setNextEnabled ( page(PROJECTION), true );
}
else
{
setNextEnabled ( page(PROJECTION), false );
}
}
/**************************** REGION ********************************/
void QgsGrassNewMapset::setRegionPage()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::setRegionPage()" << std::endl;
#endif
// Set defaults
if ( !mRegionModified )
{
setGrassRegionDefaults();
}
// Create new projection
QgsSpatialRefSys newSrs;
if ( mProjRadioButton->isChecked() )
{
#ifdef QGISDEBUG
std::cerr << "getCurrentSRSID() = " << mProjectionSelector->getCurrentSRSID() << std::endl;
#endif
if ( mProjectionSelector->getCurrentSRSID() > 0 )
{
newSrs.createFromSrsId ( mProjectionSelector->getCurrentSRSID() );
if ( ! newSrs.isValid() )
{
QMessageBox::warning( 0, tr("Warning"),
tr("Cannot create projection.") );
}
}
}
// Reproject previous region if it was modified
// and if previous and current projection is valid
if ( mRegionModified && newSrs.isValid() && mSrs.isValid()
&& newSrs.srsid() != mSrs.srsid() )
{
QgsCoordinateTransform trans( mSrs, newSrs );
double n = mNorthLineEdit->text().toDouble();
double s = mSouthLineEdit->text().toDouble();
double e = mEastLineEdit->text().toDouble();
double w = mWestLineEdit->text().toDouble();
std::vector<QgsPoint> points;
// TODO: this is not perfect
points.push_back( QgsPoint(w,s) );
points.push_back( QgsPoint(e,n) );
bool ok = true;
for ( int i = 0; i < 2; i++ )
{
try
{
points[i] = trans.transform ( points[i] );
}
catch(QgsCsException &cse)
{
Q_UNUSED(cse);
std::cerr << "Cannot transform point" << std::endl;
ok = false;
break;
}
}
if ( ok )
{
mNorthLineEdit->setText( QString::number( points[1].y() ) );
mSouthLineEdit->setText( QString::number( points[0].y() ) );
mEastLineEdit->setText( QString::number( points[1].x() ) );
mWestLineEdit->setText( QString::number( points[0].x() ) );
}
else
{
QMessageBox::warning( 0, tr("Warning"), tr("Cannot reproject "
"previously set region, default region set." ) );
setGrassRegionDefaults();
}
}
// Set current region projection
mSrs = newSrs;
// Enable / disable region selection widgets
if ( mNoProjRadioButton->isChecked() )
{
mRegionMap->hide();
mCurrentRegionButton->hide();
mRegionsComboBox->hide();
mRegionButton->hide();
mSetRegionFrame->hide();
}
else
{
mRegionMap->show();
mCurrentRegionButton->show();
mRegionsComboBox->show();
mRegionButton->show();
mSetRegionFrame->show();
QgsRect ext = mIface->getMapCanvas()->extent();
if ( ext.xMin() >= ext.xMax() || ext.yMin() >= ext.yMax() )
{
mCurrentRegionButton->setEnabled(false);
}
}
checkRegion();
if ( !mNoProjRadioButton->isChecked() )
{
drawRegion();
}
}
void QgsGrassNewMapset::setGrassRegionDefaults()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::setGrassRegionDefaults() mCellHead.proj = " << mCellHead.proj << std::endl;
#endif
int srsid = QgsProject::instance()->readNumEntry(
"SpatialRefSys","/ProjectSRSID",0);
#ifdef QGISDEBUG
std::cerr << "current project srsid = " << srsid << std::endl;
#endif
QgsRect ext = mIface->getMapCanvas()->extent();
bool extSet = false;
if ( ext.xMin() < ext.xMax() && ext.yMin() < ext.yMax() )
{
extSet = true;
}
if ( extSet &&
( mNoProjRadioButton->isChecked() ||
( mProjRadioButton->isChecked()
&& srsid == mProjectionSelector->getCurrentSRSID() )
)
)
{
mNorthLineEdit->setText( QString::number(ext.yMax()) );
mSouthLineEdit->setText( QString::number(ext.yMin()) );
mEastLineEdit->setText( QString::number(ext.xMax()) );
mWestLineEdit->setText( QString::number(ext.xMin()) );
}
else if ( mCellHead.proj == PROJECTION_XY )
{
mNorthLineEdit->setText("1000");
mSouthLineEdit->setText("0");
mEastLineEdit->setText("1000");
mWestLineEdit->setText("0");
}
else if ( mCellHead.proj == PROJECTION_LL )
{
mNorthLineEdit->setText("90");
mSouthLineEdit->setText("-90");
mEastLineEdit->setText("180");
mWestLineEdit->setText("-180");
}
else
{
mNorthLineEdit->setText("100000");
mSouthLineEdit->setText("-100000");
mEastLineEdit->setText("100000");
mWestLineEdit->setText("-100000");
}
mRegionModified = false;
}
void QgsGrassNewMapset::regionChanged()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::regionChanged()" << std::endl;
#endif
mRegionModified = true;
checkRegion();
drawRegion();
}
void QgsGrassNewMapset::checkRegion()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::checkRegion()" << std::endl;
#endif
bool err = false;
setError ( mRegionErrorLabel, "");
setNextEnabled ( page(REGION), false );
if ( mNorthLineEdit->text().stripWhiteSpace().length() == 0
|| mSouthLineEdit->text().stripWhiteSpace().length() == 0
|| mEastLineEdit->text().stripWhiteSpace().length() == 0
|| mWestLineEdit->text().stripWhiteSpace().length() == 0 )
{
return;
}
double n = mNorthLineEdit->text().toDouble();
double s = mSouthLineEdit->text().toDouble();
double e = mEastLineEdit->text().toDouble();
double w = mWestLineEdit->text().toDouble();
if ( n <= s )
{
setError ( mRegionErrorLabel, tr("North must be greater than south") );
err = true;
}
if ( e <= w && mCellHead.proj != PROJECTION_LL )
{
setError ( mRegionErrorLabel, tr("East must be greater than west") );
err = true;
}
if ( err ) return;
mCellHead.north = n;
mCellHead.south = s;
mCellHead.east = e;
mCellHead.west = w;
mCellHead.top = 1.;
mCellHead.bottom = 0.;
double res = (e - w)/1000; // reasonable resolution
double res3 = res/10.;
mCellHead.rows = (int) ( (n-s)/res );
mCellHead.rows3 = (int) ( (n-s)/res3 );
mCellHead.cols = (int) ( (e-w)/res );
mCellHead.cols3 = (int) ( (e-w)/res3 );
mCellHead.depths = 1;
mCellHead.ew_res = res;
mCellHead.ew_res3 = res3;
mCellHead.ns_res = res;
mCellHead.ns_res3 = res3;
mCellHead.tb_res = 1.;
mCellHead.zone = 0;
setNextEnabled ( page(REGION), true );
}
void QgsGrassNewMapset::loadRegions()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::loadRegions()" << std::endl;
#endif
QString path = QgsApplication::pkgDataPath() + "/grass/locations.gml";
#ifdef QGISDEBUG
std::cerr << "load:" << path.local8Bit().data() << std::endl;
#endif
QFile file ( path );
if ( !file.exists() ) {
QMessageBox::warning( 0, tr("Warning"),
tr("Regions file (") + path + tr(") not found.") );
return;
}
if ( ! file.open( QIODevice::ReadOnly ) ) {
QMessageBox::warning( 0, tr("Warning"),
tr("Cannot open locations file (") + path +tr(")") );
return;
}
QDomDocument doc ( "gml:FeatureCollection" );
QString err;
int line, column;
if ( !doc.setContent( &file, &err, &line, &column ) ) {
QString errmsg = tr("Cannot read locations file (") + path + tr("):\n")
+ err + tr("\nat line ") + QString::number(line)
+ tr(" column ") + QString::number(column);
std::cerr << errmsg.toLocal8Bit().data() << std::endl;
QMessageBox::warning( 0, tr("Warning"), errmsg );
file.close();
return;
}
QDomElement docElem = doc.documentElement();
QDomNodeList nodes = docElem.elementsByTagName ( "gml:featureMember" );
for ( int i = 0; i < nodes.count(); i++ )
{
QDomNode node = nodes.item(i);
if ( node.isNull() ) {
continue;
}
QDomElement elem = node.toElement();
QDomNodeList nameNodes = elem.elementsByTagName ( "gml:name" );
if ( nameNodes.count() == 0 ) continue;
if ( nameNodes.item(0).isNull() ) continue;
QDomElement nameElem = nameNodes.item(0).toElement();
if ( nameElem.text().isNull() ) continue;
QDomNodeList envNodes = elem.elementsByTagName ( "gml:Envelope" );
if ( envNodes.count() == 0 ) continue;
if ( envNodes.item(0).isNull() ) continue;
QDomElement envElem = envNodes.item(0).toElement();
QDomNodeList coorNodes = envElem.elementsByTagName ( "gml:coordinates" );
if ( coorNodes.count() == 0 ) continue;
if ( coorNodes.item(0).isNull() ) continue;
QDomElement coorElem = coorNodes.item(0).toElement();
if ( coorElem.text().isNull() ) continue;
QStringList coor = QStringList::split ( " ", coorElem.text() );
if ( coor.size() != 2 )
{
std::cerr << "Cannot parse coordinates: " << coorElem.text().ascii() << std::endl;
continue;
}
QStringList ll = QStringList::split ( ",", coor[0] );
QStringList ur = QStringList::split ( ",", coor[1] );
if ( ll.size() != 2 || ur.size() != 2 )
{
std::cerr << "Cannot parse coordinates: " << coorElem.text().ascii() << std::endl;
continue;
}
// Add region
mRegionsComboBox->insertItem ( nameElem.text() );
QgsPoint llp ( ll[0].toDouble(), ll[1].toDouble() );
mRegionsPoints.push_back( llp );
QgsPoint urp ( ur[0].toDouble(), ur[1].toDouble() );
mRegionsPoints.push_back( urp );
}
file.close();
}
void QgsGrassNewMapset::setSelectedRegion()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassNewMapset::setSelectedRegion()" << std::endl;
#endif
// mRegionsPoints are in EPSG 4326 = LL WGS84
int index = 2 * mRegionsComboBox->currentItem();
std::vector<QgsPoint> points;
// corners ll lr ur ul
points.push_back( QgsPoint(mRegionsPoints[index]) );
points.push_back( QgsPoint(mRegionsPoints[index+1].x(),
mRegionsPoints[index].y()) );
points.push_back( QgsPoint(mRegionsPoints[index+1]) );
points.push_back( QgsPoint(mRegionsPoints[index].x(),
mRegionsPoints[index+1].y()) );
// Convert to currently selected coordinate system
// Warning: seems that crashes if source == dest
if ( mProjectionSelector->getCurrentSRSID() != 2585 )
{
// Warning: QgsSpatialRefSys::EPSG is broken (using epsg_id)
//QgsSpatialRefSys source ( 4326, QgsSpatialRefSys::EPSG );
QgsSpatialRefSys source ( 2585, QgsSpatialRefSys::QGIS_SRSID );
if ( !source.isValid() )
{
QMessageBox::warning( 0, tr("Warning"),
tr("Cannot create QgsSpatialRefSys" ) );
return;
}
QgsSpatialRefSys dest ( mProjectionSelector->getCurrentSRSID(),
QgsSpatialRefSys::QGIS_SRSID );
if ( !dest.isValid() )
{
QMessageBox::warning( 0, tr("Warning"),
tr("Cannot create QgsSpatialRefSys") );
return;
}
QgsCoordinateTransform trans( source, dest );
bool ok = true;
for ( int i = 0; i < 4; i++ )
{
#ifdef QGISDEBUG
std::cerr << points[i].x() << "," << points[i].y() << "->" << std::endl;
#endif
try
{
points[i] = trans.transform ( points[i] );
#ifdef QGISDEBUG
std::cerr << points[i].x() << "," << points[i].y() << std::endl;
#endif
}
catch(QgsCsException &cse)
{
Q_UNUSED(cse);
std::cerr << "Cannot transform point" << std::endl;
ok = false;
break;
}
}
if ( !ok )
{
QMessageBox::warning( 0, tr("Warning"),
tr( "Cannot reproject selected region.") );
return;
}
}
double n, s, e, w;
if ( mCellHead.proj == PROJECTION_LL )
{
n = points[2].y();
s = points[0].y();
e = points[1].x();
w = points[0].x();
if ( n > 90 ) n = 90;
if ( s < -90 ) s = -90;
/*
if ( e > 180 ) e = 180;
if ( w < -180 ) w = 180;
*/
}
else
{
for ( int i = 0; i < 4; i++ )
{
if ( i == 0 || points[i].y() > n ) n = points[i].y();
if ( i == 0 || points[i].y() < s ) s = points[i].y();
if ( i == 0 || points[i].x() > e ) e = points[i].x();
if ( i == 0 || points[i].x() < w ) w = points[i].x();
}
}
mNorthLineEdit->setText( QString::number(n) );