Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Browse files
Browse the repository at this point in the history
commit missing files for new simplify implementation by alexbruy
git-svn-id: http://svn.osgeo.org/qgis/trunk@14678 c8812cc2-4d05-0410-92ff-de0c093fc19c
- Loading branch information
cfarmer
committed
Nov 15, 2010
1 parent
7e75080
commit 3182ee4
Showing
2 changed files
with
435 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,272 @@ | ||
# -*- coding: utf-8 -*- | ||
|
||
from PyQt4.QtCore import * | ||
from PyQt4.QtGui import * | ||
|
||
from qgis.core import * | ||
from qgis.gui import * | ||
|
||
import ftools_utils | ||
|
||
from ui_frmSimplify import Ui_Dialog | ||
|
||
class Dialog( QDialog, Ui_Dialog ): | ||
def __init__( self, iface ): | ||
QDialog.__init__( self ) | ||
self.setupUi( self ) | ||
self.iface = iface | ||
|
||
self.simplifyThread = None | ||
|
||
self.okButton = self.buttonBox.button( QDialogButtonBox.Ok ) | ||
self.closeButton = self.buttonBox.button( QDialogButtonBox.Close ) | ||
|
||
QObject.connect( self.writeShapefileCheck, SIGNAL( "stateChanged( int )" ), self.updateGui ) | ||
QObject.connect( self.btnSelectOutputFile, SIGNAL( "clicked()" ), self.selectOutputFile ) | ||
|
||
self.manageGui() | ||
|
||
def manageGui( self ): | ||
layers = ftools_utils.getLayerNames( [ QGis.Polygon, QGis.Line ] ) | ||
self.cmbInputLayer.addItems( layers ) | ||
|
||
def updateGui( self ): | ||
if self.writeShapefileCheck.isChecked(): | ||
self.outputFileEdit.setEnabled( True ) | ||
self.btnSelectOutputFile.setEnabled( True ) | ||
self.addToCanvasCheck.setEnabled( True ) | ||
else: | ||
self.outputFileEdit.setEnabled( False ) | ||
self.btnSelectOutputFile.setEnabled( False ) | ||
self.addToCanvasCheck.setEnabled( False ) | ||
self.encoding = None | ||
|
||
def selectOutputFile( self ): | ||
self.outputFileEdit.clear() | ||
(self.shapefileName, self.encoding) = ftools_utils.saveDialog(self) | ||
if self.shapefileName is None or self.encoding is None: | ||
return | ||
self.outputFileEdit.setText(QString(self.shapefileName)) | ||
|
||
def accept( self ): | ||
vLayer = ftools_utils.getVectorLayerByName( self.cmbInputLayer.currentText() ) | ||
|
||
QApplication.setOverrideCursor( Qt.WaitCursor ) | ||
self.okButton.setEnabled( False ) | ||
|
||
if self.writeShapefileCheck.isChecked(): | ||
outFileName = self.outputFileEdit.text() | ||
outFile = QFile( outFileName ) | ||
if outFile.exists(): | ||
if not QgsVectorFileWriter.deleteShapeFile( outFileName ): | ||
QmessageBox.warning( self, self.tr( "Delete error" ), self.tr( "Can't delete file %1" ).arg( outFileName ) ) | ||
return | ||
self.simplifyThread = GeneralizationThread( vLayer, self.useSelectionCheck.isChecked(), self.toleranceSpin.value(), True, outFileName, self.encoding ) | ||
else: | ||
self.simplifyThread = GeneralizationThread( vLayer, self.useSelectionCheck.isChecked(), self.toleranceSpin.value(), False, None, None ) | ||
QObject.connect( self.simplifyThread, SIGNAL( "rangeCalculated( PyQt_PyObject )" ), self.setProgressRange ) | ||
QObject.connect( self.simplifyThread, SIGNAL( "featureProcessed()" ), self.featureProcessed ) | ||
QObject.connect( self.simplifyThread, SIGNAL( "generalizationFinished( PyQt_PyObject )" ), self.generalizationFinished ) | ||
QObject.connect( self.simplifyThread, SIGNAL( "generalizationInterrupted()" ), self.generalizationInterrupted ) | ||
|
||
self.closeButton.setText( self.tr( "Cancel" ) ) | ||
QObject.disconnect( self.buttonBox, SIGNAL( "rejected()" ), self.reject ) | ||
QObject.connect( self.closeButton, SIGNAL( "clicked()" ), self.stopProcessing ) | ||
|
||
self.simplifyThread.start() | ||
|
||
def setProgressRange( self, max ): | ||
self.progressBar.setRange( 0, max ) | ||
|
||
def featureProcessed( self ): | ||
self.progressBar.setValue( self.progressBar.value() + 1 ) | ||
|
||
def generalizationFinished( self, pointsCount ): | ||
self.stopProcessing() | ||
|
||
QMessageBox.information( self, | ||
self.tr( "Simplify results" ), | ||
self.tr( "There were %1 vertices in original dataset which\nwere reduced to %2 vertices after simplification" ) | ||
.arg( pointsCount[ 0 ] ) | ||
.arg( pointsCount[ 1 ] ) ) | ||
|
||
self.restoreGui() | ||
if self.addToCanvasCheck.isEnabled() and self.addToCanvasCheck.isChecked(): | ||
if not ftools_utils.addShapeToCanvas( unicode( self.shapefileName ) ): | ||
QMessageBox.warning( self, self.tr( "Merging" ), | ||
self.tr( "Error loading output shapefile:\n%1" ) | ||
.arg( unicode( self.shapefileName ) ) ) | ||
|
||
self.iface.mapCanvas().refresh() | ||
#self.restoreGui() | ||
|
||
def generalizationInterrupted( self ): | ||
self.restoreGui() | ||
|
||
def stopProcessing( self ): | ||
if self.simplifyThread != None: | ||
self.simplifyThread.stop() | ||
self.simplifyThread = None | ||
|
||
def restoreGui( self ): | ||
self.progressBar.setValue( 0 ) | ||
QApplication.restoreOverrideCursor() | ||
QObject.connect( self.buttonBox, SIGNAL( "rejected()" ), self.reject ) | ||
self.closeButton.setText( self.tr( "Close" ) ) | ||
self.okButton.setEnabled( True ) | ||
|
||
def geomVertexCount( geometry ): | ||
geomType = geometry.type() | ||
if geomType == 1: # line | ||
points = geometry.asPolyline() | ||
return len( points ) | ||
elif geomType == 2: # polygon | ||
polylines = geometry.asPolygon() | ||
points = [] | ||
for l in polylines: | ||
points.extend( l ) | ||
return len( points ) | ||
else: | ||
return None | ||
|
||
class GeneralizationThread( QThread ): | ||
def __init__( self, inputLayer, useSelection, tolerance, writeShape, shapePath, shapeEncoding ): | ||
QThread.__init__( self, QThread.currentThread() ) | ||
self.inputLayer = inputLayer | ||
self.useSelection = useSelection | ||
self.tolerance = tolerance | ||
self.writeShape = writeShape | ||
self.outputFileName = shapePath | ||
self.outputEncoding = shapeEncoding | ||
|
||
self.shapeFileWriter = None | ||
self.pointsBefore = 0 | ||
self.pointsAfter = 0 | ||
|
||
self.mutex = QMutex() | ||
self.stopMe = 0 | ||
|
||
def run( self ): | ||
self.mutex.lock() | ||
self.stopMe = 0 | ||
self.mutex.unlock() | ||
|
||
interrupted = False | ||
|
||
shapeFileWriter = None | ||
|
||
if self.writeShape: | ||
vProvider = self.inputLayer.dataProvider() | ||
allAttrs = vProvider.attributeIndexes() | ||
vProvider.select( allAttrs ) | ||
shapeFields = vProvider.fields() | ||
crs = vProvider.crs() | ||
wkbType = self.inputLayer.wkbType() | ||
if not crs.isValid(): | ||
crs = None | ||
shapeFileWriter = QgsVectorFileWriter( self.outputFileName, self.outputEncoding, shapeFields, wkbType, crs ) | ||
featureId = 0 | ||
if self.useSelection: | ||
selection = self.inputLayer.selectedFeatures() | ||
self.emit( SIGNAL( "rangeCalculated( PyQt_PyObject )" ), len( selection ) ) | ||
for f in selection: | ||
featGeometry = QgsGeometry( f.geometry() ) | ||
attrMap = f.attributeMap() | ||
self.pointsBefore += geomVertexCount( featGeometry ) | ||
newGeometry = featGeometry.simplify( self.tolerance ) | ||
self.pointsAfter += geomVertexCount( newGeometry ) | ||
feature = QgsFeature() | ||
feature.setGeometry( newGeometry ) | ||
feature.setAttributeMap( attrMap ) | ||
shapeFileWriter.addFeature( feature ) | ||
featureId += 1 | ||
self.emit( SIGNAL( "featureProcessed()" ) ) | ||
|
||
self.mutex.lock() | ||
s = self.stopMe | ||
self.mutex.unlock() | ||
if s == 1: | ||
interrupted = True | ||
break | ||
else: | ||
self.emit( SIGNAL( "rangeCalculated( PyQt_PyObject )" ), vProvider.featureCount() ) | ||
f = QgsFeature() | ||
while vProvider.nextFeature( f ): | ||
featGeometry = QgsGeometry( f.geometry() ) | ||
attrMap = f.attributeMap() | ||
self.pointsBefore += geomVertexCount( featGeometry ) | ||
newGeometry = featGeometry.simplify( self.tolerance ) | ||
self.pointsAfter += geomVertexCount( newGeometry ) | ||
feature = QgsFeature() | ||
feature.setGeometry( newGeometry ) | ||
feature.setAttributeMap( attrMap ) | ||
shapeFileWriter.addFeature( feature ) | ||
featureId += 1 | ||
self.emit( SIGNAL( "featureProcessed()" ) ) | ||
|
||
self.mutex.lock() | ||
s = self.stopMe | ||
self.mutex.unlock() | ||
if s == 1: | ||
interrupted = True | ||
break | ||
else: # modify existing shapefile | ||
if not self.inputLayer.isEditable(): | ||
self.inputLayer.startEditing() | ||
self.inputLayer.beginEditCommand( QString( "Simplify line(s)" ) ) | ||
if self.useSelection: | ||
selection = self.inputLayer.selectedFeatures() | ||
self.emit( SIGNAL( "rangeCalculated( PyQt_PyObject )" ), len( selection ) ) | ||
for f in selection: | ||
featureId = f.id() | ||
featGeometry = QgsGeometry( f.geometry() ) | ||
self.pointsBefore += geomVertexCount( featGeometry ) | ||
newGeometry = featGeometry.simplify( self.tolerance ) | ||
self.pointsAfter += geomVertexCount( newGeometry ) | ||
self.inputLayer.changeGeometry( featureId, newGeometry ) | ||
self.emit( SIGNAL( "featureProcessed()" ) ) | ||
|
||
self.mutex.lock() | ||
s = self.stopMe | ||
self.mutex.unlock() | ||
if s == 1: | ||
interrupted = True | ||
break | ||
else: | ||
vProvider = self.inputLayer.dataProvider() | ||
self.emit( SIGNAL( "rangeCalculated( PyQt_PyObject )" ), vProvider.featureCount() ) | ||
f = QgsFeature() | ||
while vProvider.nextFeature( f ): | ||
featureId = f.id() | ||
featGeometry = QgsGeometry( f.geometry() ) | ||
self.pointsBefore += geomVertexCount( featGeometry ) | ||
newGeometry = featGeometry.simplify( self.tolerance ) | ||
self.pointsAfter += geomVertexCount( newGeometry ) | ||
self.inputLayer.changeGeometry( featureId, newGeometry ) | ||
self.emit( SIGNAL( "featureProcessed()" ) ) | ||
|
||
self.mutex.lock() | ||
s = self.stopMe | ||
self.mutex.unlock() | ||
if s == 1: | ||
interrupted = True | ||
break | ||
|
||
# cleanup | ||
if self.inputLayer.isEditable(): | ||
self.inputLayer.endEditCommand() | ||
|
||
if shapeFileWriter != None: | ||
del shapeFileWriter | ||
|
||
if not interrupted: | ||
self.emit( SIGNAL( "generalizationFinished( PyQt_PyObject )" ), ( self.pointsBefore, self.pointsAfter ) ) | ||
else: | ||
self.emit( SIGNAL( "generalizationInterrupted()" ) ) | ||
|
||
def stop( self ): | ||
self.mutex.lock() | ||
self.stopMe = 1 | ||
self.mutex.unlock() | ||
|
||
QThread.wait( self ) |
Oops, something went wrong.