Python QgsVectorLayer.setLabelsEnabled方法代码示例

# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import setLabelsEnabled [as 别名]
 def createLayer(self):
     '''Create a memory layer from the zoom to locations'''
     rowcnt = self.resultsTable.rowCount()
     if rowcnt == 0:
         return
     attr = []
     for item, label in enumerate(LABELS[0:self.numCol]):
         label = label.lower()
         if item <= 1:
             attr.append(QgsField(label, QVariant.Double))
         else:
             attr.append(QgsField(label, QVariant.String))
     ptLayer = QgsVectorLayer("Point?crs=epsg:4326", u"Lat Lon Locations", "memory")
     provider = ptLayer.dataProvider()
     provider.addAttributes(attr)
     ptLayer.updateFields()
     
     for id in range(rowcnt):
         item = self.resultsTable.item(id, 0).data(Qt.UserRole)
         feature = QgsFeature()
         feature.setGeometry(QgsGeometry.fromPointXY(QgsPointXY(item.lon, item.lat)))
         attr = [item.lat, item.lon, item.label]
         for i in range(3, self.numCol):
             attr.append(item.data[i-3])
         feature.setAttributes(attr)
         provider.addFeatures([feature])
     
     ptLayer.updateExtents()
     if self.settings.multiZoomStyleID == 1:
         settings = QgsPalLayerSettings()
         settings.fieldName = 'label'
         settings.placement = QgsPalLayerSettings.AroundPoint
         labeling = QgsVectorLayerSimpleLabeling(settings)
         ptLayer.setLabeling(labeling)
         ptLayer.setLabelsEnabled(True)
     elif self.settings.multiZoomStyleID == 2 and os.path.isfile(self.settings.customQMLFile()):
         ptLayer.loadNamedStyle(self.settings.customQMLFile())
         
     QgsProject.instance().addMapLayer(ptLayer)

# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import setLabelsEnabled [as 别名]
    def testBlockingItems(self):
        """
        Test rendering map item with blocking items
        """
        format = QgsTextFormat()
        format.setFont(QgsFontUtils.getStandardTestFont("Bold"))
        format.setSize(20)
        format.setNamedStyle("Bold")
        format.setColor(QColor(0, 0, 0))
        settings = QgsPalLayerSettings()
        settings.setFormat(format)
        settings.fieldName = "'X'"
        settings.isExpression = True
        settings.placement = QgsPalLayerSettings.OverPoint

        vl = QgsVectorLayer("Point?crs=epsg:4326&field=id:integer", "vl", "memory")
        vl.setRenderer(QgsNullSymbolRenderer())
        f = QgsFeature(vl.fields(), 1)
        for x in range(15):
            for y in range(15):
                f.setGeometry(QgsPoint(x, y))
                vl.dataProvider().addFeature(f)

        vl.setLabeling(QgsVectorLayerSimpleLabeling(settings))
        vl.setLabelsEnabled(True)

        p = QgsProject()

        engine_settings = QgsLabelingEngineSettings()
        engine_settings.setFlag(QgsLabelingEngineSettings.DrawLabelRectOnly, True)
        p.setLabelingEngineSettings(engine_settings)

        p.addMapLayer(vl)
        layout = QgsLayout(p)
        layout.initializeDefaults()
        p.setCrs(QgsCoordinateReferenceSystem('EPSG:4326'))
        map = QgsLayoutItemMap(layout)
        map.attemptSetSceneRect(QRectF(10, 10, 180, 180))
        map.setFrameEnabled(True)
        map.zoomToExtent(vl.extent())
        map.setLayers([vl])
        map.setId('map')
        layout.addLayoutItem(map)

        map2 = QgsLayoutItemMap(layout)
        map2.attemptSetSceneRect(QRectF(0, 5, 50, 80))
        map2.setFrameEnabled(True)
        map2.setBackgroundEnabled(False)
        map2.setId('map2')
        layout.addLayoutItem(map2)

        map3 = QgsLayoutItemMap(layout)
        map3.attemptSetSceneRect(QRectF(150, 160, 50, 50))
        map3.setFrameEnabled(True)
        map3.setBackgroundEnabled(False)
        map3.setId('map3')
        layout.addLayoutItem(map3)

        map.addLabelBlockingItem(map2)
        map.addLabelBlockingItem(map3)
        map.setMapFlags(QgsLayoutItemMap.MapItemFlags())
        checker = QgsLayoutChecker('composermap_label_blockers', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        doc = QDomDocument("testdoc")
        elem = layout.writeXml(doc, QgsReadWriteContext())

        l2 = QgsLayout(p)
        self.assertTrue(l2.readXml(elem, doc, QgsReadWriteContext()))
        map_restore = [i for i in l2.items() if isinstance(i, QgsLayoutItemMap) and i.id() == 'map'][0]
        map2_restore = [i for i in l2.items() if isinstance(i, QgsLayoutItemMap) and i.id() == 'map2'][0]
        map3_restore = [i for i in l2.items() if isinstance(i, QgsLayoutItemMap) and i.id() == 'map3'][0]
        self.assertTrue(map_restore.isLabelBlockingItem(map2_restore))
        self.assertTrue(map_restore.isLabelBlockingItem(map3_restore))

# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import setLabelsEnabled [as 别名]
    def testPartialLabels(self):
        """
        Test rendering map item with a show partial labels flag
        """
        format = QgsTextFormat()
        format.setFont(QgsFontUtils.getStandardTestFont("Bold"))
        format.setSize(20)
        format.setNamedStyle("Bold")
        format.setColor(QColor(0, 0, 0))
        settings = QgsPalLayerSettings()
        settings.setFormat(format)
        settings.fieldName = "'X'"
        settings.isExpression = True
        settings.placement = QgsPalLayerSettings.OverPoint

        vl = QgsVectorLayer("Point?crs=epsg:4326&field=id:integer", "vl", "memory")
        vl.setRenderer(QgsNullSymbolRenderer())
        f = QgsFeature(vl.fields(), 1)
        for x in range(15):
            for y in range(15):
                f.setGeometry(QgsPoint(x, y))
                vl.dataProvider().addFeature(f)

        vl.setLabeling(QgsVectorLayerSimpleLabeling(settings))
        vl.setLabelsEnabled(True)

        p = QgsProject()

        engine_settings = QgsLabelingEngineSettings()
        engine_settings.setFlag(QgsLabelingEngineSettings.UsePartialCandidates, False)
        engine_settings.setFlag(QgsLabelingEngineSettings.DrawLabelRectOnly, True)
        p.setLabelingEngineSettings(engine_settings)

        p.addMapLayer(vl)
        layout = QgsLayout(p)
        layout.initializeDefaults()
        p.setCrs(QgsCoordinateReferenceSystem('EPSG:4326'))
        map = QgsLayoutItemMap(layout)
        map.attemptSetSceneRect(QRectF(10, 10, 180, 180))
        map.setFrameEnabled(True)
        map.zoomToExtent(vl.extent())
        map.setLayers([vl])
        layout.addLayoutItem(map)

        # default should always be to hide partial labels
        self.assertFalse(map.mapFlags() & QgsLayoutItemMap.ShowPartialLabels)

        # hiding partial labels (the default)
        map.setMapFlags(QgsLayoutItemMap.MapItemFlags())
        checker = QgsLayoutChecker('composermap_label_nomargin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        # showing partial labels
        map.setMapFlags(QgsLayoutItemMap.ShowPartialLabels)
        checker = QgsLayoutChecker('composermap_show_partial_labels', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import setLabelsEnabled [as 别名]
    def testLabelMargin(self):
        """
        Test rendering map item with a label margin set
        """
        format = QgsTextFormat()
        format.setFont(QgsFontUtils.getStandardTestFont("Bold"))
        format.setSize(20)
        format.setNamedStyle("Bold")
        format.setColor(QColor(0, 0, 0))
        settings = QgsPalLayerSettings()
        settings.setFormat(format)
        settings.fieldName = "'X'"
        settings.isExpression = True
        settings.placement = QgsPalLayerSettings.OverPoint

        vl = QgsVectorLayer("Point?crs=epsg:4326&field=id:integer", "vl", "memory")
        vl.setRenderer(QgsNullSymbolRenderer())
        f = QgsFeature(vl.fields(), 1)
        for x in range(15):
            for y in range(15):
                f.setGeometry(QgsPoint(x, y))
                vl.dataProvider().addFeature(f)

        vl.setLabeling(QgsVectorLayerSimpleLabeling(settings))
        vl.setLabelsEnabled(True)

        p = QgsProject()

        engine_settings = QgsLabelingEngineSettings()
        engine_settings.setFlag(QgsLabelingEngineSettings.UsePartialCandidates, False)
        engine_settings.setFlag(QgsLabelingEngineSettings.DrawLabelRectOnly, True)
        p.setLabelingEngineSettings(engine_settings)

        p.addMapLayer(vl)
        layout = QgsLayout(p)
        layout.initializeDefaults()
        p.setCrs(QgsCoordinateReferenceSystem('EPSG:4326'))
        map = QgsLayoutItemMap(layout)
        map.attemptSetSceneRect(QRectF(10, 10, 180, 180))
        map.setFrameEnabled(True)
        map.zoomToExtent(vl.extent())
        map.setLayers([vl])
        layout.addLayoutItem(map)

        checker = QgsLayoutChecker('composermap_label_nomargin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        map.setLabelMargin(QgsLayoutMeasurement(15, QgsUnitTypes.LayoutMillimeters))
        checker = QgsLayoutChecker('composermap_label_margin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        map.setLabelMargin(QgsLayoutMeasurement(3, QgsUnitTypes.LayoutCentimeters))
        checker = QgsLayoutChecker('composermap_label_cm_margin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        map.setMapRotation(45)
        map.zoomToExtent(vl.extent())
        map.setScale(map.scale() * 1.2)
        checker = QgsLayoutChecker('composermap_rotated_label_margin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        # data defined
        map.setMapRotation(0)
        map.zoomToExtent(vl.extent())
        map.dataDefinedProperties().setProperty(QgsLayoutObject.MapLabelMargin, QgsProperty.fromExpression('1+3'))
        map.refresh()
        checker = QgsLayoutChecker('composermap_dd_label_margin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import setLabelsEnabled [as 别名]

#.........这里部分代码省略.........
            # add a feature
            fet = QgsFeature(fields)

            #set geometry
            fromCrs = QgsCoordinateReferenceSystem(4326)
            xform = QgsCoordinateTransform( fromCrs, self.poilayer.crs(), QgsProject.instance() )
            prjPt = xform.transform( pt )
            fet.setGeometry(QgsGeometry.fromPointXY(prjPt))
      
            fet['id'] = int( poiId )
            fet['thema'] = theme
            fet['categorie'] = category
            fet['type'] = poiType
            fet['naam'] = name
            fet["email"] = email
            fet["telefoon"] = phone
            #address
            fet['straat'] = straat
            fet['huisnr'] = huisnr
            fet['busnr'] = busnr
            fet['postcode'] = postcode
            fet['gemeente'] = gemeente
            
            fet['link'] = link
            fet['lastupdate'] = tijd
            fet['owner'] = owner
      
            self.poiProvider.addFeatures([ fet ])
            self.poilayer.updateExtents()
    
        if saveToFile and not QgsProject.instance().mapLayer(self.poilayerid):
            save = self._saveToFile( sender, startFolder )
            if save:
              fpath, flType = save
              error, msg = QgsVectorFileWriter.writeAsVectorFormat(self.poilayer,fileName=fpath, fileEncoding="utf-8", driverName=flType ) 
              if error == QgsVectorFileWriter.NoError:
                  self.poilayer = QgsVectorLayer( fpath , layername, "ogr")
                  self.poiProvider = self.poilayer.dataProvider()
              else: 
                  del self.poilayer, self.poiProvider 
                  raise Exception( msg )
            else:
              del self.poilayer, self.poiProvider 
              return 

        # add Labels
        text_format = QgsTextFormat()
        text_format.setSize(12)
        buffer_settings = QgsTextBufferSettings()
        buffer_settings.setEnabled(True)
        buffer_settings.setSize(1)
        buffer_settings.setColor(QColor("white"))
        
        palyr = QgsPalLayerSettings() 
        text_format.setBuffer(buffer_settings)
        palyr.setFormat(text_format)
        
        palyr.enabled = True 
        palyr.fieldName = 'naam' 
        palyr.placement = QgsPalLayerSettings.Free 

        self.poilayer.setLabelsEnabled(True)
        self.poilayer.setLabeling( QgsVectorLayerSimpleLabeling(palyr) )

        # add layer if not already
        QgsProject.instance().addMapLayer(self.poilayer)

        # store layer id and refresh
        self.poilayerid = self.poilayer.id()
        self.canvas.refresh()
    
    def _saveToFile( self, sender, startFolder=None ):
        'save to file'
        filter = "OGC GeoPackage (*.gpkg);;ESRI Shape Files (*.shp);;SpatiaLite (*.sqlite);;Geojson File (*.geojson);;GML ( *.gml);;Comma separated value File (excel) (*.csv);;MapInfo TAB (*.TAB);;Any File (*.*)" 
        Fdlg = QFileDialog()
        Fdlg.setFileMode(QFileDialog.AnyFile)
        fName, __ = QFileDialog.getSaveFileName(sender, "open file", filter=filter, directory=startFolder)
        if fName:
          ext = os.path.splitext( fName )[1]
          
          if "GPKG" in ext.upper():
            flType = "GPKG"
          elif "SHP" in ext.upper():
            flType = "ESRI Shapefile"
          elif "SQLITE" in ext.upper():
            flType = "SQLite" 
          elif "GEOJSON" in ext.upper():  #no update possible -> hidden
            flType = "GeoJSON"
          elif "GML" in ext.upper():
            flType = "GML"
          elif 'TAB' in ext.upper():
            flType = 'MapInfo File'
          elif 'CSV' in ext.upper():
            flType = 'CSV'
          else:
            fName = fName + ".shp"
            flType = "ESRI Shapefile"
          return (fName , flType )
        else:
            return None

# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import setLabelsEnabled [as 别名]

#.........这里部分代码省略.........
          save = self._saveToFile( sender, startFolder )
          if save:
            fpath, flType = save                
            error, msg = QgsVectorFileWriter.writeAsVectorFormat(self.adreslayer, fileName=fpath, fileEncoding="utf-8", driverName=flType)
            if error == QgsVectorFileWriter.NoError:
              self.adreslayer = QgsVectorLayer( fpath, layername, "ogr")
              self.adresProvider = self.adreslayer.dataProvider()
            else: 
              del self.adreslayer, self.adresProvider 
              return
          else: 
            del self.adreslayer, self.adresProvider 
            return
          
        #  add to map
        QgsProject.instance().addMapLayer(self.adreslayer)
        
        #labels
        text_format = QgsTextFormat()
        text_format.setSize(12)
        buffer_settings = QgsTextBufferSettings()
        buffer_settings.setEnabled(True)
        buffer_settings.setSize(1)
        buffer_settings.setColor(QColor("white"))
        
        palyr = QgsPalLayerSettings() 
        text_format.setBuffer(buffer_settings)
        palyr.setFormat(text_format)
        
        palyr.enabled = True 
        palyr.fieldName = 'adres' 
        palyr.placement = QgsPalLayerSettings.Free 

        self.adreslayer.setLabelsEnabled(True)
        self.adreslayer.setLabeling( QgsVectorLayerSimpleLabeling(palyr) )
       
        # store layer id and refresh      
        self.adreslayerid = self.adreslayer.id()
        self.canvas.refresh()
      
    def _saveToFile( self, sender, startFolder=None ):
        'save to file'
        filter = "OGC GeoPackage (*.gpkg);;ESRI Shape Files (*.shp);;SpatiaLite (*.sqlite);;Geojson File (*.geojson);;GML ( *.gml);;Comma separated value File (excel) (*.csv);;MapInfo TAB (*.TAB);;Any File (*.*)" 
        Fdlg = QFileDialog()
        Fdlg.setFileMode(QFileDialog.AnyFile)
        fName, __ = QFileDialog.getSaveFileName(sender, "open file", filter=filter, directory=startFolder)
        if fName:
          ext = os.path.splitext( fName )[1]
          if "GPKG" in ext.upper():
            flType = "GPKG"
          elif "SHP" in ext.upper():
            flType = "ESRI Shapefile"
          elif "SQLITE" in ext.upper():
            flType = "SQLite" 
          elif "GEOJSON" in ext.upper():  #no update possible -> hidden
            flType = "GeoJSON"
          elif "GML" in ext.upper():
            flType = "GML"
          elif 'TAB' in ext.upper():
            flType = 'MapInfo File'
          elif 'CSV' in ext.upper():
            flType = 'CSV'
          else:
            fName = fName + ".shp"
            flType = "ESRI Shapefile"
          return (fName , flType )