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[FEATURE] Build spatial index tool for fTools (see #2779). Currently
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| # -*- coding: utf-8 -*- | ||
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| """ | ||
| *************************************************************************** | ||
| doSpatialIndex.py - build spatial index for vector layers or files | ||
| -------------------------------------- | ||
| Date : 11-Nov-2011 | ||
| Copyright : (C) 2011 by Alexander Bruy | ||
| Email : alexander dot bruy at gmail dot com | ||
| *************************************************************************** | ||
| * * | ||
| * 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. * | ||
| * * | ||
| *************************************************************************** | ||
| """ | ||
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| from PyQt4.QtCore import * | ||
| from PyQt4.QtGui import * | ||
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| from qgis.core import * | ||
| from qgis.gui import * | ||
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| import ftools_utils | ||
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| from ui_frmSpatialIndex import Ui_Dialog | ||
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| class Dialog( QDialog, Ui_Dialog ): | ||
| def __init__( self, iface ): | ||
| QDialog.__init__( self ) | ||
| self.setupUi( self ) | ||
| self.iface = iface | ||
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| self.workThread = None | ||
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| self.btnOk = self.buttonBox.button( QDialogButtonBox.Ok ) | ||
| self.btnClose = self.buttonBox.button( QDialogButtonBox.Close ) | ||
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| QObject.connect( self.chkExternalFiles, SIGNAL( "stateChanged( int )" ), self.toggleExternalFiles ) | ||
| QObject.connect( self.btnSelectFiles, SIGNAL( "clicked()" ), self.selectFiles ) | ||
| QObject.connect( self.lstLayers, SIGNAL( "itemSelectionChanged()" ), self.updateLayerList ) | ||
| QObject.connect( self.btnSelectAll, SIGNAL( "clicked()" ), self.selectAll ) | ||
| QObject.connect( self.btnSelectNone, SIGNAL( "clicked()" ), self.selectNone ) | ||
| QObject.connect( self.btnClearList, SIGNAL( "clicked()" ), self.clearList ) | ||
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| self.manageGui() | ||
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| def manageGui( self ): | ||
| self.btnSelectFiles.setEnabled( False ) | ||
| self.btnClearList.setEnabled( False ) | ||
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| self.fillLayersList() | ||
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| def fillLayersList( self ): | ||
| self.lstLayers.clear() | ||
| layers = ftools_utils.getLayerNames( [ QGis.Line, QGis.Point, QGis.Polygon ] ) | ||
| for lay in layers: | ||
| source = ftools_utils.getVectorLayerByName( lay ).source() | ||
| item = QListWidgetItem( lay, self.lstLayers ) | ||
| item.setData( Qt.UserRole, source ) | ||
| item.setData( Qt.ToolTipRole, source ) | ||
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| def toggleExternalFiles( self ): | ||
| if self.chkExternalFiles.isChecked(): | ||
| self.btnSelectFiles.setEnabled( True ) | ||
| self.btnClearList.setEnabled( True ) | ||
| self.btnSelectAll.setEnabled( False ) | ||
| self.btnSelectNone.setEnabled( False ) | ||
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| self.lstLayers.clear() | ||
| self.lstLayers.setSelectionMode( QAbstractItemView.NoSelection ) | ||
| self.layers = [] | ||
| else: | ||
| self.btnSelectFiles.setEnabled( False ) | ||
| self.btnClearList.setEnabled( False ) | ||
| self.btnSelectAll.setEnabled( True ) | ||
| self.btnSelectNone.setEnabled( True ) | ||
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| self.fillLayersList() | ||
| self.lstLayers.setSelectionMode( QAbstractItemView.ExtendedSelection ) | ||
| self.updateLayerList() | ||
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| def updateLayerList( self ): | ||
| self.layers = [] | ||
| selection = self.lstLayers.selectedItems() | ||
| for item in selection: | ||
| self.layers.append( item.text() ) | ||
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| def selectFiles( self ): | ||
| filters = QgsProviderRegistry.instance().fileVectorFilters() | ||
| ( files, self.encoding ) = ftools_utils.openDialog( self, filtering = filters, dialogMode = "MultipleFiles" ) | ||
| if files is None: | ||
| return | ||
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| self.layers.extend( [ unicode( f ) for f in files ] ) | ||
| self.lstLayers.addItems( files ) | ||
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| def selectAll( self ): | ||
| self.lstLayers.selectAll() | ||
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| def selectNone( self ): | ||
| self.lstLayers.clearSelection() | ||
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| def clearList( self ): | ||
| self.layers = [] | ||
| self.lstLayers.clear() | ||
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| def accept( self ): | ||
| QApplication.setOverrideCursor( Qt.WaitCursor ) | ||
| self.btnOk.setEnabled( False ) | ||
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| self.workThread = SpatialIdxThread( self.layers, self.chkExternalFiles.isChecked() ) | ||
| self.progressBar.setRange( 0, len( self.layers ) ) | ||
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| QObject.connect( self.workThread, SIGNAL( "layerProcessed()" ), self.layerProcessed ) | ||
| QObject.connect( self.workThread, SIGNAL( "processFinished( PyQt_PyObject )" ), self.processFinished ) | ||
| QObject.connect( self.workThread, SIGNAL( "processInterrupted()" ), self.processInterrupted ) | ||
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| self.btnClose.setText( self.tr( "Cancel" ) ) | ||
| QObject.disconnect( self.buttonBox, SIGNAL( "rejected()" ), self.reject ) | ||
| QObject.connect( self.btnClose, SIGNAL( "clicked()" ), self.stopProcessing ) | ||
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| self.workThread.start() | ||
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| def layerProcessed( self ): | ||
| self.progressBar.setValue( self.progressBar.value() + 1 ) | ||
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| def processInterrupted( self ): | ||
| self.restoreGui() | ||
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| def processFinished( self, errors ): | ||
| self.stopProcessing() | ||
| self.restoreGui() | ||
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| if not errors.isEmpty(): | ||
| msg = QString( "Processing of the following layers/files ended with error:<br><br>" ).append( errors.join( "<br>" ) ) | ||
| QErrorMessage( self ).showMessage( msg ) | ||
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| QMessageBox.information( self, self.tr( "Finished" ), self.tr( "Processing completed." ) ) | ||
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| def stopProcessing( self ): | ||
| if self.workThread != None: | ||
| self.workThread.stop() | ||
| self.workThread = None | ||
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| def restoreGui( self ): | ||
| self.progressBar.setValue( 0 ) | ||
| QApplication.restoreOverrideCursor() | ||
| QObject.connect( self.buttonBox, SIGNAL( "rejected()" ), self.reject ) | ||
| self.btnClose.setText( self.tr( "Close" ) ) | ||
| self.btnOk.setEnabled( True ) | ||
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| if self.chkExternalFiles.isChecked(): | ||
| self.clearList() | ||
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| class SpatialIdxThread( QThread ): | ||
| def __init__( self, layers, isFiles ): | ||
| QThread.__init__( self, QThread.currentThread() ) | ||
| self.layers = layers | ||
| self.isFiles = isFiles | ||
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| self.mutex = QMutex() | ||
| self.stopMe = 0 | ||
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| self.errors = QStringList() | ||
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| def run( self ): | ||
| self.mutex.lock() | ||
| self.stopMe = 0 | ||
| self.mutex.unlock() | ||
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| interrupted = False | ||
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| if self.isFiles: | ||
| for layer in self.layers: | ||
| vl = QgsVectorLayer( layer, "tmp", "ogr" ) | ||
| provider = vl.dataProvider() | ||
| if provider.capabilities() & QgsVectorDataProvider.CreateSpatialIndex: | ||
| if not provider.createSpatialIndex(): | ||
| self.errors.append( layer ) | ||
| else: | ||
| self.errors.append( layer ) | ||
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| self.emit( SIGNAL( "layerProcessed()" ) ) | ||
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| self.mutex.lock() | ||
| s = self.stopMe | ||
| self.mutex.unlock() | ||
| if s == 1: | ||
| interrupted = True | ||
| break | ||
| else: | ||
| for layer in self.layers: | ||
| vl = ftools_utils.getVectorLayerByName( layer ) | ||
| provider = vl.dataProvider() | ||
| if provider.capabilities() & QgsVectorDataProvider.CreateSpatialIndex: | ||
| if not provider.createSpatialIndex(): | ||
| self.errors.append( layer ) | ||
| else: | ||
| self.errors.append( layer ) | ||
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| self.emit( SIGNAL( "layerProcessed()" ) ) | ||
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| self.mutex.lock() | ||
| s = self.stopMe | ||
| self.mutex.unlock() | ||
| if s == 1: | ||
| interrupted = True | ||
| break | ||
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| if not interrupted: | ||
| self.emit( SIGNAL( "processFinished( PyQt_PyObject )" ), self.errors ) | ||
| else: | ||
| self.emit( SIGNAL( "processInterrupted()" ) ) | ||
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| def stop( self ): | ||
| self.mutex.lock() | ||
| self.stopMe = 1 | ||
| self.mutex.unlock() | ||
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| QThread.wait( self ) |
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