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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 "qgsgrassnewmapset.h"
#include "qgsgrassplugin.h"
#include "qgsgrass.h"
#include "qgisinterface.h"
#include "qgsapplication.h"
#include "qgscoordinatetransform.h"
#include "qgslogger.h"
#include "qgsmapcanvas.h"
#include "qgsproject.h"
#include "qgsprojectionselector.h"
#include <QCloseEvent>
#include <QFileDialog>
#include <QMessageBox>
#include <QSettings>
#include <QTextStream>
extern "C"
{
#include <grass/gprojects.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
bool QgsGrassNewMapset::mRunning = false;
QgsGrassNewMapset::QgsGrassNewMapset( QgisInterface *iface,
QgsGrassPlugin *plugin, QWidget * parent,
Qt::WFlags f ) :
QWizard( parent, f ),
QgsGrassNewMapsetBase( )
{
QgsDebugMsg( "QgsGrassNewMapset()" );
setupUi( this );
#ifdef Q_WS_MAC
setWizardStyle( QWizard::ClassicStyle );
#endif
mRunning = true;
mIface = iface;
mProjectionSelector = 0;
mPreviousPage = -1;
mRegionModified = false;
QString mapPath = QgsApplication::pkgDataPath() + "/grass/world.png";
QgsDebugMsg( QString( "mapPath = %1" ).arg( mapPath ) );
//mPixmap = QPixmap( *(mRegionMap->pixmap()) );
mPixmap.load( mapPath );
QgsDebugMsg( QString( "mPixmap.isNull() = %1" ).arg( mPixmap.isNull() ) );
mRegionsInited = false;
mPlugin = plugin;
setError( mDatabaseErrorLabel, "" );
setError( mLocationErrorLabel, "" );
setError( mProjErrorLabel, "" );
setError( mRegionErrorLabel, "" );
setError( mMapsetErrorLabel, "" );
const QColor& paletteBackgroundColor = palette().color( backgroundRole() );
QPalette palette = mDatabaseText->palette();
palette.setColor( mDatabaseText->backgroundRole(), paletteBackgroundColor );
mDatabaseText->setPalette( palette );
palette = mLocationText->palette();
palette.setColor( mLocationText->backgroundRole(), paletteBackgroundColor );
mLocationText->setPalette( palette );
palette = mRegionText->palette();
palette.setColor( mRegionText->backgroundRole(), paletteBackgroundColor );
mRegionText->setPalette( palette );
palette = mMapsetText->palette();
palette.setColor( mMapsetText->backgroundRole(), paletteBackgroundColor );
mMapsetText->setPalette( palette );
// DATABASE
QSettings settings;
QString db = settings.value( "/GRASS/lastGisdbase" ).toString();
if ( !db.isNull() )
{
mDatabaseLineEdit->setText( db );
}
else
{
mDatabaseLineEdit->setText( QDir::currentPath() );
}
databaseChanged();
// Create example tree structure
mTreeListView->clear();
QTreeWidgetItem *dbi = new QTreeWidgetItem( mTreeListView, QStringList() << "OurDatabase" << tr( "Database" ) );
dbi->setExpanded( true );
QTreeWidgetItem *l = new QTreeWidgetItem( dbi, QStringList() << "Mexico" << tr( "Location 1" ) );
l->setExpanded( true );
QTreeWidgetItem *m = new QTreeWidgetItem( l, QStringList() << "PERMANENT" << tr( "System mapset" ) );
m->setExpanded( true );
m = new QTreeWidgetItem( l, QStringList() << "Alejandra" << tr( "User's mapset" ) );
m->setExpanded( true );
m = new QTreeWidgetItem( l, QStringList() << "Juan" << tr( "User's mapset" ) );
m->setExpanded( true );
l = new QTreeWidgetItem( dbi, QStringList() << "New Zealand" << tr( "Location 2" ) );
l->setExpanded( true );
m = new QTreeWidgetItem( l, QStringList() << "PERMANENT" << tr( "System mapset" ) );
m->setExpanded( true );
m = new QTreeWidgetItem( l, QStringList() << "Cimrman" << tr( "User's mapset" ) );
m->setExpanded( true );
// CRS
// MAPSET
mMapsetsListView->clear();
// FINISH
connect( this, SIGNAL( currentIdChanged( int ) ),
this, SLOT( pageSelected( int ) ) );
}
QgsGrassNewMapset::~QgsGrassNewMapset()
{
QgsDebugMsg( "entered." );
mRunning = false;
}
/*************************** DATABASE *******************************/
void QgsGrassNewMapset::browseDatabase()
{
// TODO: unfortunately QFileDialog does not support 'new' directory
QFileDialog *fd = new QFileDialog( this, NULL, mDatabaseLineEdit->text() );
fd->setFileMode( QFileDialog::DirectoryOnly );
if ( fd->exec() == QDialog::Accepted )
{
mDatabaseLineEdit->setText( fd->selectedFiles().first() );
databaseChanged();
}
}
void QgsGrassNewMapset::databaseChanged()
{
QgsDebugMsg( "entered." );
// TODO: reset next tabs
//
QSettings settings;
settings.setValue( "/GRASS/lastGisdbase", mDatabaseLineEdit->text() );
button( QWizard::NextButton )->setEnabled( 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() )
{
button( QWizard::NextButton )->setEnabled( true );
}
else
{
setError( mDatabaseErrorLabel, tr( "No writable locations, the database is not writable!" ) );
}
}
/*************************** LOCATION *******************************/
void QgsGrassNewMapset::setLocationPage( )
{
QgsDebugMsg( "entered." );
setLocations();
}
void QgsGrassNewMapset::setLocations( )
{
QgsDebugMsg( "entered." );
mLocationComboBox->clear();
QSettings settings;
QString lastLocation = settings.value( "/GRASS/lastLocation" ).toString();
// 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( -1, QString( d[i] ) );
if ( QString( d[i] ) == lastLocation )
{
sel = idx;
}
idx++;
}
}
if ( sel >= 0 )
{
mLocationComboBox->setCurrentIndex( 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 );
}
else
{
mLocationComboBox->setEnabled( false );
mLocationLineEdit->setEnabled( true );
}
checkLocation();
}
int QgsGrassNewMapset::nextId() const
{
int id = currentId();
switch ( id )
{
case LOCATION:
if ( mSelectLocationRadioButton->isChecked() )
{
id = MAPSET;
break;
}
case DATABASE:
case CRS:
case REGION:
case MAPSET:
id += 1;
break;
case FINISH:
default:
id = -1;
}
return id;
}
void QgsGrassNewMapset::checkLocation()
{
setError( mLocationErrorLabel, "" );
button( QWizard::NextButton )->setEnabled( true );
if ( mCreateLocationRadioButton->isChecked() )
{
// TODO?: Check spaces in the name
QString location = mLocationLineEdit->text().trimmed();
if ( location.length() == 0 )
{
button( QWizard::NextButton )->setEnabled( false );
setError( mLocationErrorLabel, tr( "Enter location name!" ) );
}
else
{
if ( QFile::exists( mDatabaseLineEdit->text() + "/" + location ) )
{
button( QWizard::NextButton )->setEnabled( false );
setError( mLocationErrorLabel, tr( "The location exists!" ) );
}
}
}
}
void QgsGrassNewMapset::existingLocationChanged( const QString &text )
{
QgsDebugMsg( "entered." );
}
void QgsGrassNewMapset::newLocationChanged()
{
QgsDebugMsg( "entered." );
checkLocation();
}
/************************** CRS ******************************/
void QgsGrassNewMapset::setProjectionPage()
{
QgsDebugMsg( "entered." );
setGrassProjection();
}
void QgsGrassNewMapset::sridSelected( QString theSRID )
{
QgsDebugMsg( "entered." );
projectionSelected();
}
void QgsGrassNewMapset::projectionSelected()
{
QgsDebugMsg( "entered." );
setGrassProjection();
}
void QgsGrassNewMapset::projRadioSwitched()
{
QgsDebugMsg( "entered." );
if ( mNoProjRadioButton->isChecked() )
{
mProjectionSelector->setEnabled( false );
}
else
{
mProjectionSelector->setEnabled( true );
}
projectionSelected();
}
void QgsGrassNewMapset::setGrassProjection()
{
QgsDebugMsg( "entered." );
setError( mProjErrorLabel, "" );
QString proj4 = mProjectionSelector->selectedProj4String();
// Not defined
if ( mNoProjRadioButton->isChecked() )
{
mCellHead.proj = PROJECTION_XY;
mCellHead.zone = 0;
mProjInfo = 0;
mProjUnits = 0;
button( QWizard::NextButton )->setEnabled( true );
return;
}
// Define projection
if ( !proj4.isEmpty() )
{
QgsDebugMsg( QString( "proj4 = %1" ).arg( proj4.toLocal8Bit().constData() ) );
OGRSpatialReferenceH hCRS = NULL;
hCRS = OSRNewSpatialReference( NULL );
int errcode;
const char *oldlocale = setlocale( LC_NUMERIC, NULL );
setlocale( LC_NUMERIC, "C" );
errcode = OSRImportFromProj4( hCRS, proj4.toUtf8() );
setlocale( LC_NUMERIC, oldlocale );
if ( errcode != OGRERR_NONE )
{
QgsDebugMsg( QString( "OGR can't parse PROJ.4-style parameter string:\n%1\nOGR Error code was %2" ).arg( proj4 ).arg( errcode ) );
mCellHead.proj = PROJECTION_XY;
mCellHead.zone = 0;
mProjInfo = 0;
mProjUnits = 0;
}
else
{
#ifdef QGISDEBUG
QgsDebugMsg( QString( "OSRIsGeographic = %1" ).arg( OSRIsGeographic( hCRS ) ) );
QgsDebugMsg( QString( "OSRIsProjected = %1" ).arg( OSRIsProjected( hCRS ) ) );
char *wkt = NULL;
if (( errcode = OSRExportToWkt( hCRS, &wkt ) ) != OGRERR_NONE )
{
QgsDebugMsg( QString( "OGR can't get Wkt-style parameter string\nOGR Error code was %1" ).arg( errcode ) );
}
else
{
QgsDebugMsg( QString( "wkt = %1" ).arg( wkt ) );
}
#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, hCRS, 0 );
#else
// Buggy version:
ret = GPJ_osr_to_grass( &mCellHead, &mProjInfo,
&mProjUnits, ( void ** )hCRS, 0 );
#endif
// Note: It seems that GPJ_osr_to_grass()returns always 1,
// -> test if mProjInfo was set
QgsDebugMsg( QString( "ret = %1" ).arg( ret ) );
QgsDebugMsg( QString( "mProjInfo = %1" ).arg( QString::number(( qulonglong )mProjInfo, 16 ).toLocal8Bit().constData() ) );
}
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;
}
button( QWizard::NextButton )->setEnabled( mProjInfo && mProjUnits );
}
/**************************** REGION ********************************/
void QgsGrassNewMapset::setRegionPage()
{
QgsDebugMsg( "entered." );
// Set defaults
if ( !mRegionModified )
{
setGrassRegionDefaults();
}
// Create new projection
QgsCoordinateReferenceSystem newSrs;
if ( mProjRadioButton->isChecked() )
{
QgsDebugMsg( QString( "selectedCrsId() = %1" ).arg( mProjectionSelector->selectedCrsId() ) );
if ( mProjectionSelector->selectedCrsId() > 0 )
{
newSrs.createFromSrsId( mProjectionSelector->selectedCrsId() );
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 );
QgsDebugMsg( "Cannot transform point" );
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();
QgsRectangle ext = mIface->mapCanvas()->extent();
if ( ext.xMinimum() >= ext.xMaximum() || ext.yMinimum() >= ext.yMaximum() )
{
mCurrentRegionButton->setEnabled( false );
}
}
checkRegion();
if ( !mNoProjRadioButton->isChecked() )
{
drawRegion();
}
}
void QgsGrassNewMapset::setGrassRegionDefaults()
{
QgsDebugMsg( QString( "mCellHead.proj = %1" ).arg( mCellHead.proj ) );
int srsid = QgsProject::instance()->readNumEntry(
"SpatialRefSys", "/ProjectCRSID", 0 );
QgsDebugMsg( QString( "current project srsid = %1" ).arg( srsid ) );
QgsRectangle ext = mIface->mapCanvas()->extent();
bool extSet = false;
if ( ext.xMinimum() < ext.xMaximum() && ext.yMinimum() < ext.yMaximum() )
{
extSet = true;
}
if ( extSet &&
( mNoProjRadioButton->isChecked() ||
( mProjRadioButton->isChecked()
&& srsid == mProjectionSelector->selectedCrsId() )
)
)
{
mNorthLineEdit->setText( QString::number( ext.yMaximum() ) );
mSouthLineEdit->setText( QString::number( ext.yMinimum() ) );
mEastLineEdit->setText( QString::number( ext.xMaximum() ) );
mWestLineEdit->setText( QString::number( ext.xMinimum() ) );
}
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()
{
QgsDebugMsg( "entered." );
mRegionModified = true;
checkRegion();
drawRegion();
}
void QgsGrassNewMapset::checkRegion()
{
QgsDebugMsg( "entered." );
bool err = false;
setError( mRegionErrorLabel, "" );
button( QWizard::NextButton )->setEnabled( false );
if ( mNorthLineEdit->text().trimmed().length() == 0
|| mSouthLineEdit->text().trimmed().length() == 0
|| mEastLineEdit->text().trimmed().length() == 0
|| mWestLineEdit->text().trimmed().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;
button( QWizard::NextButton )->setEnabled( true );
}
void QgsGrassNewMapset::loadRegions()
{
QgsDebugMsg( "entered." );
QString path = QgsApplication::pkgDataPath() + "/grass/locations.gml";
QgsDebugMsg( QString( "load:%1" ).arg( path.toLocal8Bit().constData() ) );
QFile file( path );
if ( !file.exists() )
{
QMessageBox::warning( 0, tr( "Warning" ),
tr( "Regions file (%1) not found." ).arg( path ) );
return;
}
if ( ! file.open( QIODevice::ReadOnly ) )
{
QMessageBox::warning( 0, tr( "Warning" ),
tr( "Cannot open locations file (%1)" ).arg( path ) );
return;
}
QDomDocument doc( "gml:FeatureCollection" );
QString err;
int line, column;
if ( !doc.setContent( &file, &err, &line, &column ) )
{
QString errmsg = tr( "Cannot read locations file (%1):" ).arg( path )
+ tr( "\n%1\nat line %2 column %3" ).arg( err ).arg( line ).arg( column );
QgsDebugMsg( errmsg );
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 = coorElem.text().split( " ", QString::SkipEmptyParts );
if ( coor.size() != 2 )
{
QgsDebugMsg( QString( "Cannot parse coordinates: %1" ).arg( coorElem.text() ) );
continue;
}
QStringList ll = coor[0].split( ",", QString::SkipEmptyParts );
QStringList ur = coor[1].split( ",", QString::SkipEmptyParts );
if ( ll.size() != 2 || ur.size() != 2 )
{
QgsDebugMsg( QString( "Cannot parse coordinates: %1" ).arg( coorElem.text() ) );
continue;
}
// Add region
mRegionsComboBox->addItem( 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()
{
QgsDebugMsg( "entered." );
// mRegionsPoints are in EPSG 4326 = LL WGS84
int index = 2 * mRegionsComboBox->currentIndex();
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->selectedCrsId() != GEOCRS_ID )
{
// Warning: QgsCoordinateReferenceSystem::EpsgCrsId is broken (using epsg_id)
//QgsCoordinateReferenceSystem source ( 4326, QgsCoordinateReferenceSystem::EpsgCrsId );
QgsCoordinateReferenceSystem source( GEOCRS_ID, QgsCoordinateReferenceSystem::InternalCrsId );
if ( !source.isValid() )
{
QMessageBox::warning( 0, tr( "Warning" ),
tr( "Cannot create QgsCoordinateReferenceSystem" ) );
return;
}
QgsCoordinateReferenceSystem dest( mProjectionSelector->selectedCrsId(),
QgsCoordinateReferenceSystem::InternalCrsId );
if ( !dest.isValid() )
{
QMessageBox::warning( 0, tr( "Warning" ),
tr( "Cannot create QgsCoordinateReferenceSystem" ) );
return;
}
QgsCoordinateTransform trans( source, dest );
bool ok = true;
for ( int i = 0; i < 4; i++ )
{
QgsDebugMsg( QString( "%1,%2->" ).arg( points[i].x() ).arg( points[i].y() ) );
try
{
points[i] = trans.transform( points[i] );
QgsDebugMsg( QString( "%1,%2" ).arg( points[i].x() ).arg( points[i].y() ) );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( "Cannot transform point" );
ok = false;
break;
}
}
if ( !ok )
{
QMessageBox::warning( 0, tr( "Warning" ),
tr( "Cannot reproject selected region." ) );
return;
}
}
double n = -90.0, s = 90.0, e = -180.0, w = 180.0;
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 0
if ( e > 180 ) e = 180;
if ( w < -180 ) w = 180;
#endif
}
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 ) );
mSouthLineEdit->setText( QString::number( s ) );
mEastLineEdit->setText( QString::number( e ) );
mWestLineEdit->setText( QString::number( w ) );
mRegionModified = true;
checkRegion();
drawRegion();
}
void QgsGrassNewMapset::setCurrentRegion()
{
QgsDebugMsg( "entered." );
QgsRectangle ext = mIface->mapCanvas()->extent();
int srsid = QgsProject::instance()->readNumEntry(
"SpatialRefSys", "/ProjectCRSID", 0 );
QgsCoordinateReferenceSystem srs( srsid, QgsCoordinateReferenceSystem::InternalCrsId );
QgsDebugMsg( QString( "current project srsid = %1" ).arg( srsid ) );
QgsDebugMsg( QString( "srs.isValid() = %1" ).arg( srs.isValid() ) );
std::vector<QgsPoint> points;
// TODO: this is not perfect
points.push_back( QgsPoint( ext.xMinimum(), ext.yMinimum() ) );
points.push_back( QgsPoint( ext.xMaximum(), ext.yMaximum() ) );
// TODO add a method, this code is copy-paste from setSelectedRegion
if ( srs.isValid() && mSrs.isValid()
&& srs.srsid() != mSrs.srsid() )
{
QgsCoordinateTransform trans( srs, mSrs );
bool ok = true;
for ( int i = 0; i < 2; i++ )
{
try
{
points[i] = trans.transform( points[i] );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( "Cannot transform point" );
ok = false;
break;
}
}
if ( !ok )
{
QMessageBox::warning( 0, tr( "Warning" ), tr( "Cannot reproject region" ) );
return;
}
}
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() ) );
mRegionModified = true;
checkRegion();
drawRegion();
QgsDebugMsg( "setCurrentRegion - End" );
}
void QgsGrassNewMapset::clearRegion()
{
QgsDebugMsg( "entered." );
QPixmap pm = mPixmap;
mRegionMap->setPixmap( pm );
}
void QgsGrassNewMapset::drawRegion()
{
QgsDebugMsg( "entered." );
QPixmap pm = mPixmap;
mRegionMap->setPixmap( pm );
if ( mCellHead.proj == PROJECTION_XY ) return;
QgsDebugMsg( QString( "pm.isNull() = %1" ).arg( pm.isNull() ) );
QPainter p( &pm );
p.setPen( QPen( QColor( 255, 0, 0 ), 3 ) );