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qgsgrassselect.cpp
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qgsgrassselect.cpp
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/***************************************************************************
qgsgrassselect.cpp - Select GRASS layer dialog
-------------------
begin : March, 2004
copyright : (C) 2004 by Radim Blazek
email : blazek@itc.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 <qfile.h>
#include <QFileDialog>
#include <qsettings.h>
#include <qpixmap.h>
#include <q3listbox.h>
#include <qstringlist.h>
#include <qlabel.h>
#include <QComboBox>
#include <qmessagebox.h>
#include <qinputdialog.h>
#include <qsettings.h>
extern "C" {
#include <grass/gis.h>
#include <grass/Vect.h>
}
#include "../../src/providers/grass/qgsgrass.h"
#include "qgsgrassselect.h"
QgsGrassSelect::QgsGrassSelect(int type):QgsGrassSelectBase()
{
#ifdef QGISDEBUG
std::cerr << "QgsGrassSelect() type = " << type << std::endl;
#endif
setupUi(this);
if ( first ) {
if ( QgsGrass::activeMode() ) {
lastGisdbase = QgsGrass::getDefaultGisdbase();
lastLocation = QgsGrass::getDefaultLocation();
lastMapset = QgsGrass::getDefaultMapset();
} else {
QSettings settings;
lastGisdbase = settings.readEntry("/GRASS/lastGisdbase");
//check we got something from qsettings otherwise default to users home dir
if (lastGisdbase.isEmpty())
{
QDir home = QDir::home();
lastGisdbase = QString( home.path() );
}
}
first = false;
}
QgsGrassSelect::type = type;
switch ( type )
{
case QgsGrassSelect::VECTOR:
setCaption ( tr("Select GRASS Vector Layer") );
break;
case QgsGrassSelect::RASTER:
/* Remove layer combo box */
Layer->hide();
elayer->hide();
setCaption ( tr("Select GRASS Raster Layer") );
break;
case QgsGrassSelect::MAPCALC:
/* Remove layer combo box */
Layer->hide();
elayer->hide();
setCaption ( tr("Select GRASS mapcalc schema") );
break;
case QgsGrassSelect::MAPSET:
Layer->hide();
elayer->hide();
MapName->hide();
emap->hide();
setCaption ( tr("Select GRASS Mapset") );
break;
}
egisdbase->setText(lastGisdbase);
setLocations();
restorePosition();
}
QgsGrassSelect::~QgsGrassSelect()
{
saveWindowLocation();
}
void QgsGrassSelect::restorePosition()
{
optionsFrame->adjustSize ();
adjustSize ();
QSettings settings;
restoreGeometry(settings.value("/GRASS/windows/select/geometry").toByteArray());
}
void QgsGrassSelect::saveWindowLocation()
{
QSettings settings;
settings.setValue("/GRASS/windows/select/geometry", saveGeometry());
}
bool QgsGrassSelect::first = true;
QString QgsGrassSelect::lastGisdbase;
QString QgsGrassSelect::lastLocation;
QString QgsGrassSelect::lastMapset;
QString QgsGrassSelect::lastVectorMap;
QString QgsGrassSelect::lastRasterMap;
QString QgsGrassSelect::lastLayer;
QString QgsGrassSelect::lastMapcalc;
void QgsGrassSelect::setLocations()
{
elocation->clear();
emapset->clear();
emap->clear();
elayer->clear();
QDir d = QDir( egisdbase->text() );
int idx = 0;
int sel = -1;
// Add all subdirs containing PERMANENT/DEFAULT_WIND
for ( unsigned int i = 0; i < d.count(); i++ ) {
if ( d[i] == "." || d[i] == ".." ) continue;
QString ldpath = egisdbase->text() + "/" + d[i];
/* TODO: G_is_location() was added to GRASS 6.1 06-05-24,
enable its use after some period (others do update) */
/*
if ( QgsGrass::versionMajor() > 6 || QgsGrass::versionMinor() > 0 )
{
if ( !G_is_location( ldpath.toLocal8Bit().constData() ) ) continue;
}
else
{
*/
QString chf = egisdbase->text() + "/" + d[i] + "/PERMANENT/DEFAULT_WIND";
if ( !QFile::exists ( chf ) ) continue;
//}
// if type is MAPSET check also if at least one mapset owned by user exists
if ( QgsGrassSelect::type == QgsGrassSelect::MAPSET )
{
bool exists = false;
QDir ld = QDir( ldpath );
for ( unsigned int j = 0; j < ld.count(); j++ )
{
if ( !QgsGrass::isMapset( ldpath + "/" + ld[j] ) ) continue;
QFileInfo info ( ldpath + "/" + ld[j] );
if ( !info.isWritable() ) continue;
// TODO: check if owner == user: how to get uer name in QT
exists = true;
break;
}
if ( !exists ) continue;
}
elocation->insertItem ( QString ( d[i] ), -1 );
if ( QString ( d[i] ) == lastLocation ) {
sel = idx;
}
idx++;
}
if ( sel >= 0 ) {
elocation->setCurrentItem(sel);
}
setMapsets();
}
void QgsGrassSelect::setMapsets()
{
#ifdef QGISDEBUG
std::cerr << "setMapsets()" << std::endl;
#endif
emapset->clear();
emap->clear();
elayer->clear();
if ( elocation->count() < 1 ) return;
// Location directory
QString ldpath = egisdbase->text() + "/" + elocation->currentText();
QDir ld = QDir( ldpath );
int idx = 0;
int sel = -1;
// Go through all subdirs and add all subdirs from vector/
for ( unsigned int i = 0; i < ld.count(); i++ )
{
if ( QgsGrass::isMapset( ldpath + "/" + ld[i] ) )
{
emapset->insertItem ( ld[i], -1 );
if ( ld[i] == lastMapset ) {
sel = idx;
}
idx++;
}
}
if ( sel >= 0 ) {
emapset->setCurrentItem(sel);
}
setMaps();
}
void QgsGrassSelect::setMaps()
{
#ifdef QGISDEBUG
std::cerr << "setMaps()" << std::endl;
#endif
// Replaced by text box to enable wild cards
emap->clear();
elayer->clear();
if ( emapset->count() < 1 ) return;
// Mapset directory
QString ldpath = egisdbase->text() + "/" + elocation->currentText() + "/" + emapset->currentText();
QDir ld = QDir( ldpath );
int idx = 0;
int sel = -1;
if (type == VECTOR ) // vector
{
QStringList list = QgsGrass::vectors ( egisdbase->text(),
elocation->currentText(), emapset->currentText() );
for ( int j = 0; j < list.count(); j++ )
{
emap->insertItem ( list[j], -1 );
if ( list[j] == lastVectorMap ) sel = idx;
idx++;
}
}
else if ( type == RASTER )
{
/* add cells */
QStringList list = QgsGrass::rasters ( egisdbase->text(),
elocation->currentText(), emapset->currentText() );
for ( int j = 0; j < list.count(); j++ )
{
emap->insertItem ( list[j], -1 );
if ( list[j] == lastRasterMap ) sel = idx;
idx++;
}
/* add groups */
// TODO add QgsGrass::groups ( use G_list( G_ELEMENT_GROUP) )
QDir md = QDir( ldpath + "/group/" );
md.setFilter (QDir::Dirs);
for ( unsigned int j = 0; j < md.count(); j++ ) {
if ( md[j] == "." || md[j] == ".." ) continue;
QString m = QString( md[j] + " (GROUP)" );
emap->insertItem ( m, -1 );
if ( m == lastRasterMap ) {
sel = idx;
}
idx++;
}
}
else if (type == MAPCALC )
{
QDir md = QDir( ldpath + "/mapcalc/" );
md.setFilter (QDir::Files);
for ( unsigned int j = 0; j < md.count(); j++ ) {
QString m = QString( md[j] );
emap->insertItem ( m, -1 );
if ( m == lastMapcalc ) {
sel = idx;
}
idx++;
}
}
if ( sel >= 0 ) {
emap->setCurrentItem(sel);
}
/*
else
{
emap->clearEdit(); // set box line empty
}
*/
setLayers();
}
void QgsGrassSelect::setLayers()
{
#ifdef QGISDEBUG
std::cerr << "setLayers()" << std::endl;
#endif
elayer->clear();
if (type != VECTOR ) return;
if ( emap->count() < 1 ) return;
QStringList layers = vectorLayers ( egisdbase->text(),
elocation->currentText(), emapset->currentText(),
emap->currentText().ascii() );
int idx = 0;
int sel = -1;
for ( int i = 0; i < layers.count(); i++ )
{
elayer->insertItem ( layers[i], -1 );
if ( layers[i] == lastLayer ) sel = idx;
idx++;
}
// if last used layer has not been found
// make default a map from layer 1
if (sel == -1)
{
for ( int j = 0; j < layers.count(); j++ )
{
if (layers[j].left(1) == "1")
{
sel = j;
break;
}
}
}
if ( sel >= 0 ) {
elayer->setCurrentItem(sel);
} else {
elayer->clearEdit(); // set box line empty
}
if ( elayer->count() == 1 ) {
elayer->setDisabled(true);
} else {
elayer->setDisabled(false);
}
}
QStringList QgsGrassSelect::vectorLayers ( QString gisdbase,
QString location, QString mapset, QString mapName )
{
QStringList list;
// Set location
QgsGrass::setLocation ( gisdbase, location);
/* Open vector */
QgsGrass::resetError();
Vect_set_open_level (2);
struct Map_info map;
int level;
// Mechanism to recover from fatal errors in GRASS
// Since fatal error routine in GRASS >= 6.3 terminates the process,
// we use setjmp() to set recovery place in case of a fatal error.
// Call to setjmp() returns 0 first time. In case of fatal error,
// our error routine uses longjmp() to come back to this context,
// this time setjmp() will return non-zero value and we can continue...
if (setjmp(QgsGrass::fatalErrorEnv()) == 0)
{
level = Vect_open_old_head (&map, (char *) mapName.ascii(),
(char *) mapset.ascii());
}
QgsGrass::clearErrorEnv();
if ( QgsGrass::getError() == QgsGrass::FATAL ) {
std::cerr << "Cannot open GRASS vector: " << QgsGrass::getErrorMessage().toLocal8Bit().data() << std::endl;
return list;
}
if ( level < 2 ) {
std::cerr << "Cannot open vector on level 2" << std::endl;
QMessageBox::warning( 0, tr("Warning"), tr("Cannot open vector on level 2 (topology not available).") );
return list;
}
#ifdef QGISDEBUG
std::cerr << "GRASS vector successfully opened" << std::endl;
#endif
// Get layers
int ncidx = Vect_cidx_get_num_fields ( &map );
for ( int i = 0; i < ncidx; i++ ) {
int field = Vect_cidx_get_field_number ( &map, i);
QString fs;
fs.sprintf("%d",field);
#ifdef QGISDEBUG
std::cerr << "i = " << i << " layer = " << field << std::endl;
#endif
/* Points */
int npoints = Vect_cidx_get_type_count ( &map, field, GV_POINT);
if ( npoints > 0 ) {
QString l = fs + "_point";
list.append ( l );
}
/* Lines */
/* Lines without category appears in layer 0, but not boundaries */
int tp;
if ( field == 0 )
tp = GV_LINE;
else
tp = GV_LINE | GV_BOUNDARY;
int nlines = Vect_cidx_get_type_count ( &map, field, tp);
if ( nlines > 0 ) {
QString l = fs + "_line";
list.append ( l );
}
/* Polygons */
int nareas = Vect_cidx_get_type_count ( &map, field, GV_AREA);
if ( nareas > 0 ) {
QString l = fs + "_polygon";
list.append ( l );
}
}
Vect_close ( &map );
return list;
}
void QgsGrassSelect::on_GisdbaseBrowse_clicked()
{
QString Gisdbase = QFileDialog::getExistingDirectory( this,
tr("Choose existing GISDBASE"), egisdbase->text() );
if ( !Gisdbase.isNull() )
{
egisdbase->setText ( Gisdbase );
}
}
void QgsGrassSelect::on_ok_clicked()
{
saveWindowLocation();
gisdbase = egisdbase->text();
lastGisdbase = QString( gisdbase );
if ( elocation->count() == 0 ) {
QString msg = tr("Wrong GISDBASE, no locations available.");
QMessageBox::warning(this, tr("Wrong GISDBASE"), msg);
return;
}
//write to qgsettings as gisdbase seems to be valid
QSettings settings;
settings.writeEntry("/GRASS/lastGisdbase",lastGisdbase );
location = elocation->currentText();
lastLocation = location;
mapset = emapset->currentText();
lastMapset = mapset;
map = emap->currentText().stripWhiteSpace();
if ( type != QgsGrassSelect::MAPSET && map.isEmpty() ) {
QString msg = tr("Select a map.");
QMessageBox::warning(0, tr("No map"), msg);
return;
}
if ( type == QgsGrassSelect::VECTOR )
{
if ( elayer->count() == 0 )
{
QMessageBox::warning(0, tr("No layer"),
tr("No layers available in this map"));
return;
}
lastVectorMap = map;
layer = elayer->currentText().stripWhiteSpace();
lastLayer = layer;
} else if ( type == QgsGrassSelect::RASTER) {
lastRasterMap = map;
if ( map.find(" (GROUP)") != -1 ) {
map.remove ( " (GROUP)" );
selectedType = QgsGrassSelect::GROUP;
} else {
selectedType = QgsGrassSelect::RASTER;
}
} else if ( type == QgsGrassSelect::MAPCALC ) {
lastMapcalc = map;
}
QDialog::accept();
}
void QgsGrassSelect::on_cancel_clicked()
{
saveWindowLocation();
QDialog::reject();
}