The following commit has been merged in the master branch:
commit c89fec8e755ac262fb8c465b653419706440987c
Author: Alexander Bruy <alexander.b...@gmail.com>
Date: Tue Mar 6 20:33:46 2012 +0200
[FEATURE] fTools: allow to calculate extent not only for whole layer but
for individual features too
diff --git a/python/plugins/fTools/tools/doGeometry.py
b/python/plugins/fTools/tools/doGeometry.py
index 978d786..d4d3e72 100644
--- a/python/plugins/fTools/tools/doGeometry.py
+++ b/python/plugins/fTools/tools/doGeometry.py
@@ -81,7 +81,8 @@ class GeometryDialog( QDialog, Ui_Dialog ):
self.tr( "Please specify valid UID field" ) )
else:
self.outShape.clear()
- self.geometry( self.inShape.currentText(), self.lineEdit.value(),
self.cmbField.currentText() )
+ self.geometry( self.inShape.currentText(), self.lineEdit.value(),
+ self.cmbField.currentText() )
def outFile( self ):
self.outShape.clear()
@@ -97,6 +98,9 @@ class GeometryDialog( QDialog, Ui_Dialog ):
self.lblCalcType.setVisible( False )
self.cmbCalcType.setVisible( False )
+ self.chkUseSelection.setVisible( False )
+ self.chkByFeatures.setVisible( False )
+
self.chkWriteShapefile.setVisible( False )
if self.myFunction == 1: # Singleparts to multipart
self.setWindowTitle( self.tr( "Singleparts to multipart" ) )
@@ -167,6 +171,8 @@ class GeometryDialog( QDialog, Ui_Dialog ):
self.label_3.setText( self.tr( "Input layer" ) )
self.label.setVisible( False )
self.lineEdit.setVisible( False )
+ self.chkByFeatures.setVisible( True )
+ self.chkUseSelection.setVisible( True )
self.lblOutputShapefile.setText( self.tr( "Output polygon shapefile" ) )
self.resize( 381, 100 )
self.populateLayers()
@@ -229,7 +235,8 @@ class GeometryDialog( QDialog, Ui_Dialog ):
self.buttonOk.setEnabled( False )
self.testThread = geometryThread( self.iface.mainWindow(), self,
self.myFunction,
vlayer, myParam, myField,
self.shapefileName, self.encoding,
- self.cmbCalcType.currentIndex(),
self.chkWriteShapefile.isChecked() )
+ self.cmbCalcType.currentIndex(),
self.chkWriteShapefile.isChecked(),
+ self.chkByFeatures.isChecked(),
self.chkUseSelection.isChecked() )
QObject.connect( self.testThread, SIGNAL( "runFinished( PyQt_PyObject )"
), self.runFinishedFromThread )
QObject.connect( self.testThread, SIGNAL( "runStatus( PyQt_PyObject )" ),
self.runStatusFromThread )
QObject.connect( self.testThread, SIGNAL( "runRange( PyQt_PyObject )" ),
self.runRangeFromThread )
@@ -288,7 +295,8 @@ class GeometryDialog( QDialog, Ui_Dialog ):
class geometryThread( QThread ):
def __init__( self, parentThread, parentObject, function, vlayer, myParam,
- myField, myName, myEncoding, myCalcType, myNewShape ):
+ myField, myName, myEncoding, myCalcType, myNewShape,
myByFeatures,
+ myUseSelection ):
QThread.__init__( self, parentThread )
self.parent = parentObject
self.running = False
@@ -300,6 +308,8 @@ class geometryThread( QThread ):
self.myEncoding = myEncoding
self.myCalcType = myCalcType
self.writeShape = myNewShape
+ self.byFeatures = myByFeatures
+ self.useSelection = myUseSelection
def run( self ):
self.running = True
@@ -319,7 +329,10 @@ class geometryThread( QThread ):
elif self.myFunction == 8: # Delaunay triangulation
success = self.delaunay_triangulation()
elif self.myFunction == 9: # Polygon from layer extent
- success = self.layer_extent()
+ if self.byFeatures:
+ success = self.feature_extent()
+ else:
+ success = self.layer_extent()
elif self.myFunction == 10: # Voronoi Polygons
success = self.voronoi_polygons()
elif self.myFunction == 11: # Lines to polygons
@@ -860,6 +873,105 @@ class geometryThread( QThread ):
return True
+ def feature_extent( self, ):
+ vprovider = self.vlayer.dataProvider()
+ vprovider.select( [] )
+
+ self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
+
+ fields = { 0 : QgsField( "MINX", QVariant.Double ),
+ 1 : QgsField( "MINY", QVariant.Double ),
+ 2 : QgsField( "MAXX", QVariant.Double ),
+ 3 : QgsField( "MAXY", QVariant.Double ),
+ 4 : QgsField( "CNTX", QVariant.Double ),
+ 5 : QgsField( "CNTY", QVariant.Double ),
+ 6 : QgsField( "AREA", QVariant.Double ),
+ 7 : QgsField( "PERIM", QVariant.Double ),
+ 8 : QgsField( "HEIGHT", QVariant.Double ),
+ 9 : QgsField( "WIDTH", QVariant.Double ) }
+
+ writer = QgsVectorFileWriter( self.myName, self.myEncoding, fields,
+ QGis.WKBPolygon, self.vlayer.crs() )
+ inFeat = QgsFeature()
+ outFeat = QgsFeature()
+ nElement = 0
+
+ if self.useSelection:
+ self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), (0,
self.vlayer.selectedFeatureCount() ) )
+ for inFeat in self.vlayer.selectedFeatures():
+ self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
+ nElement += 1
+
+ rect = inFeat.geometry().boundingBox()
+ minx = rect.xMinimum()
+ miny = rect.yMinimum()
+ maxx = rect.xMaximum()
+ maxy = rect.yMaximum()
+ height = rect.height()
+ width = rect.width()
+ cntx = minx + ( width / 2.0 )
+ cnty = miny + ( height / 2.0 )
+ area = width * height
+ perim = ( 2 * width ) + ( 2 * height )
+ rect = [ QgsPoint( minx, miny ),
+ QgsPoint( minx, maxy ),
+ QgsPoint( maxx, maxy ),
+ QgsPoint( maxx, miny ),
+ QgsPoint( minx, miny ) ]
+ geometry = QgsGeometry().fromPolygon( [ rect ] )
+
+ outFeat.setGeometry( geometry )
+ outFeat.setAttributeMap( { 0 : QVariant( minx ),
+ 1 : QVariant( miny ),
+ 2 : QVariant( maxx ),
+ 3 : QVariant( maxy ),
+ 4 : QVariant( cntx ),
+ 5 : QVariant( cnty ),
+ 6 : QVariant( area ),
+ 7 : QVariant( perim ),
+ 8 : QVariant( height ),
+ 9 : QVariant( width ) } )
+ writer.addFeature( outFeat )
+ else:
+ self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0,
vprovider.featureCount() ) )
+ while vprovider.nextFeature( inFeat ):
+ self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
+ nElement += 1
+
+ rect = inFeat.geometry().boundingBox()
+ minx = rect.xMinimum()
+ miny = rect.yMinimum()
+ maxx = rect.xMaximum()
+ maxy = rect.yMaximum()
+ height = rect.height()
+ width = rect.width()
+ cntx = minx + ( width / 2.0 )
+ cnty = miny + ( height / 2.0 )
+ area = width * height
+ perim = ( 2 * width ) + ( 2 * height )
+ rect = [ QgsPoint( minx, miny ),
+ QgsPoint( minx, maxy ),
+ QgsPoint( maxx, maxy ),
+ QgsPoint( maxx, miny ),
+ QgsPoint( minx, miny ) ]
+ geometry = QgsGeometry().fromPolygon( [ rect ] )
+
+ outFeat.setGeometry( geometry )
+ outFeat.setAttributeMap( { 0 : QVariant( minx ),
+ 1 : QVariant( miny ),
+ 2 : QVariant( maxx ),
+ 3 : QVariant( maxy ),
+ 4 : QVariant( cntx ),
+ 5 : QVariant( cnty ),
+ 6 : QVariant( area ),
+ 7 : QVariant( perim ),
+ 8 : QVariant( height ),
+ 9 : QVariant( width ) } )
+ writer.addFeature( outFeat )
+
+ del writer
+ return True
+
def simpleMeasure( self, inGeom, calcType, ellips, crs ):
if inGeom.wkbType() in ( QGis.WKBPoint, QGis.WKBPoint25D ):
pt = QgsPoint()
diff --git a/python/plugins/fTools/tools/frmGeometry.ui
b/python/plugins/fTools/tools/frmGeometry.ui
index e1bad95..591cf50 100644
--- a/python/plugins/fTools/tools/frmGeometry.ui
+++ b/python/plugins/fTools/tools/frmGeometry.ui
@@ -47,7 +47,7 @@
<widget class="QComboBox" name="cmbField"/>
</widget>
</item>
- <item row="4" column="0">
+ <item row="6" column="0">
<spacer>
<property name="orientation">
<enum>Qt::Vertical</enum>
@@ -60,7 +60,7 @@
</property>
</spacer>
</item>
- <item row="5" column="0" colspan="2">
+ <item row="7" column="0" colspan="2">
<layout class="QVBoxLayout">
<item>
<widget class="QCheckBox" name="chkWriteShapefile">
@@ -96,7 +96,7 @@
</item>
</layout>
</item>
- <item row="6" column="0">
+ <item row="8" column="0">
<spacer>
<property name="orientation">
<enum>Qt::Vertical</enum>
@@ -109,7 +109,7 @@
</property>
</spacer>
</item>
- <item row="7" column="0">
+ <item row="9" column="0">
<widget class="QProgressBar" name="progressBar">
<property name="value">
<number>0</number>
@@ -122,7 +122,7 @@
</property>
</widget>
</item>
- <item row="7" column="1">
+ <item row="9" column="1">
<widget class="QDialogButtonBox" name="buttonBox_2">
<property name="orientation">
<enum>Qt::Horizontal</enum>
@@ -189,6 +189,20 @@
</item>
</layout>
</item>
+ <item row="5" column="0" colspan="2">
+ <widget class="QCheckBox" name="chkByFeatures">
+ <property name="text">
+ <string>Calculate extent for each feature separately</string>
+ </property>
+ </widget>
+ </item>
+ <item row="4" column="0" colspan="2">
+ <widget class="QCheckBox" name="chkUseSelection">
+ <property name="text">
+ <string>Use only selected features</string>
+ </property>
+ </widget>
+ </item>
</layout>
</widget>
<resources/>
--
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