Python QProgressBar.setMaximum方法代碼示例

# 需要導入模塊: from qgis.PyQt.QtWidgets import QProgressBar [as 別名]
# 或者: from qgis.PyQt.QtWidgets.QProgressBar import setMaximum [as 別名]
class MessageBarProgress(QgsProcessingFeedback):

    def __init__(self, algname=None):
        QgsProcessingFeedback.__init__(self)

        self.msg = []
        self.progressMessageBar = \
            iface.messageBar().createMessage(self.tr('Executing algorithm <i>{0}</i>'.format(algname if algname else '')))
        self.progress = QProgressBar()
        self.progressChanged.connect(self.progress.setValue)
        self.progress.setMaximum(100)
        self.progress.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
        self.progressMessageBar.layout().addWidget(self.progress)
        self.message_bar_item = iface.messageBar().pushWidget(self.progressMessageBar,
                                                              Qgis.Info)

    def reportError(self, msg, fatalError=False):
        self.msg.append(msg)

    def close(self):
        if self.msg:
            dlg = MessageDialog()
            dlg.setTitle(QCoreApplication.translate('MessageBarProgress', 'Problem executing algorithm'))
            dlg.setMessage("<br>".join(self.msg))
            dlg.exec_()
        iface.messageBar().popWidget(self.message_bar_item)

    def tr(self, string, context=''):
        if context == '':
            context = 'MessageBarProgress'
        return QCoreApplication.translate(context, string)

# 需要導入模塊: from qgis.PyQt.QtWidgets import QProgressBar [as 別名]
# 或者: from qgis.PyQt.QtWidgets.QProgressBar import setMaximum [as 別名]
class ProgressBarLogger(QDialog):
    """A simple dialog with a progress bar and a label"""
    def __init__(self, title = None):
        QDialog.__init__(self, None)
        if title is not None:
            self.setWindowTitle(title)
        self.__label = QLabel(self)
        self.__layout = QVBoxLayout()
        self.__layout.addWidget(self.__label)
        self.__progress = QProgressBar(self)
        self.__layout.addWidget(self.__progress)
        self.setLayout(self.__layout)
        self.resize(600, 70)
        self.setFixedSize(600, 70)
        self.__progress.hide()
        self.show()

    def set_text(self, t):
        """Gets called when a text is to be logged"""
        if isinstance(t, tuple):
            lvl, msg = t
        else:
            msg = t
        self.__label.setText(msg)
        QCoreApplication.processEvents()

    def set_progress(self, i, n):
        """Gets called when there is a progression"""
        self.__progress.show()
        self.__progress.setMinimum(0)
        self.__progress.setMaximum(n)
        self.__progress.setValue(i)
        QCoreApplication.processEvents()

# 需要導入模塊: from qgis.PyQt.QtWidgets import QProgressBar [as 別名]
# 或者: from qgis.PyQt.QtWidgets.QProgressBar import setMaximum [as 別名]
    def run(self):
        """Run method that performs all the real work"""
        
        layers = self.iface.mapCanvas().layers()
        layer_list = []
        self.dlg.layerComboBox.clear()
        for layer in layers:
            layer_list.append(layer.name())
        self.dlg.layerComboBox.addItems(layer_list)
        # TODO: Make the active layer the selected item in combo box  aLayer = qgis.utils.iface.activeLayer()
        
        # TODO: Add signal to update toleranceSpinBox.suffix (Degrees) from layerComboBox.crs.mapUnits when layer is selected:
        #my_UnitType = { 0: 'Meters', 1: 'Feet', 2: 'Degrees', 7: 'NauticalMiles', 8: 'Kilometers', 9: 'Yards', 10: 'Miles', 3: 'UnknownUnit'}
        #suffix = my_UnitType[aLayer.crs().mapUnits()]
        
        # show the dialog
        self.dlg.show()
        # Run the dialog event loop
        result = self.dlg.exec_()
        # See if OK was pressed
        if result:
            if self.checkNetworkXModule() < 0:
                return -4
            import networkx as nx
            
            layerName = self.dlg.layerComboBox.currentText()
            try:
                aLayer = QgsProject.instance().mapLayersByName(layerName)[0]
            except:
                self.iface.messageBar().pushMessage("Error", "Failed to load layer!", level=Qgis.Critical)
                return -1

            try:

                previousEditingMode = True
                if not aLayer.isEditable():
                    aLayer.startEditing()
                    #self.iface.messageBar().pushMessage("Info", "Layer " + aLayer.name() + " needs to be in edit mode", level=Qgis.Info)
                    #self.iface.messageBar().pushMessage("Error", "Layer " + aLayer.name() + " needs to be in edit mode", level=Qgis.Critical)
                    #return -2
                    previousEditingMode = False
                     
                attrIdx = self.getAttributeIndex(aLayer)
                if attrIdx < 0:
                    return -3  

                progressMessageBar = self.iface.messageBar().createMessage("Creating network graph...")
                progress = QProgressBar()
                progress.setMaximum(aLayer.featureCount())
                progress.setAlignment(Qt.AlignLeft|Qt.AlignVCenter)
                progressMessageBar.layout().addWidget(progress)
                self.iface.messageBar().pushWidget(progressMessageBar, Qgis.Info)          
                
                G = nx.Graph()

                aLayer.beginEditCommand("Clear group attribute, create graph")
                # construct undirected graph
                tolerance = self.dlg.toleranceSpinBox.value()
                if tolerance == 0:
                    tolerance = 0.000001
                count = 0
                for feat in aLayer.getFeatures():
                    count += 1
                    progress.setValue(count)
                    done = aLayer.changeAttributeValue(feat.id(), attrIdx, -1)
                    geom = feat.geometry()
                    QgsGeometry.convertToSingleType(geom)       # QGIS 3.x seems to load single LineString as MultiLineString??
                    line = geom.asPolyline()
                    
                    for i in range(len(line)-1):
                        G.add_edges_from([((int(line[i][0]/tolerance), int(line[i][1]/tolerance)), (int(line[i+1][0]/tolerance), int(line[i+1][1]/tolerance)), 
                                          {'fid': feat.id()})])     # first scale by tolerance, then convert to int.  Before doing this, there were problems (in NetworkX v1) with floats not equating, thus creating disconnects that weren't there.
                    if count % 100 == 0:
                        QApplication.processEvents()      # keep the UI responsive, every 100 features
                        #TODO: check to see if Esc pressed

                aLayer.endEditCommand()
                
                self.iface.messageBar().pushMessage("Finding connected subgraphs, please wait...",  level=Qgis.Warning)     # WARNING - to highlight the next stage, where we cannot show progress
                QApplication.processEvents()
                connected_components = list(nx.connected_component_subgraphs(G))    # this takes a long time.  TODO: how to show progress?
                self.iface.messageBar().pushMessage("Updating group attribute...",  level=Qgis.Info)
                QApplication.processEvents()
                          
                # gather edges and components to which they belong
                fid_comp = {}
                for i, graph in enumerate(connected_components):
                   for edge in graph.edges(data=True):
                       fid_comp[edge[2].get('fid', None)] = i
                
                # write output to csv file
                #with open('C:/Tmp/Components.csv', 'wb') as f:
                #    w = csv.DictWriter(f, fieldnames=['fid', 'group'])
                #    w.writeheader()
                #    for (fid, group) in fid_comp.items():
                #        w.writerow({'fid': fid, 'group': group})
                
                aLayer.beginEditCommand("Update group attribute")
                for (fid, group) in fid_comp.items():
                    done = aLayer.changeAttributeValue(fid, attrIdx, group)
#.........這裏部分代碼省略.........