Python QgsMapCanvas.width方法代码示例

# 需要导入模块: from qgis.gui import QgsMapCanvas [as 别名]
# 或者: from qgis.gui.QgsMapCanvas import width [as 别名]
    def testDeferredUpdate(self):
        """ test that map canvas doesn't auto refresh on deferred layer update """
        canvas = QgsMapCanvas()
        canvas.setDestinationCrs(QgsCoordinateReferenceSystem(4326))
        canvas.setFrameStyle(0)
        canvas.resize(600, 400)
        self.assertEqual(canvas.width(), 600)
        self.assertEqual(canvas.height(), 400)

        layer = QgsVectorLayer("Polygon?crs=epsg:4326&field=fldtxt:string",
                               "layer", "memory")

        canvas.setLayers([layer])
        canvas.setExtent(QgsRectangle(10, 30, 20, 35))
        canvas.show()

        # need to wait until first redraw can occur (note that we first need to wait till drawing starts!)
        while not canvas.isDrawing():
            app.processEvents()
        while canvas.isDrawing():
            app.processEvents()

        self.assertTrue(self.canvasImageCheck('empty_canvas', 'empty_canvas', canvas))

        # add polygon to layer
        f = QgsFeature()
        f.setGeometry(QgsGeometry.fromRect(QgsRectangle(5, 25, 25, 45)))
        self.assertTrue(layer.dataProvider().addFeatures([f]))

        # deferred update - so expect that canvas will not been refreshed
        layer.triggerRepaint(True)
        timeout = time.time() + 0.1
        while time.time() < timeout:
            # messy, but only way to check that canvas redraw doesn't occur
            self.assertFalse(canvas.isDrawing())
        # canvas should still be empty
        self.assertTrue(self.canvasImageCheck('empty_canvas', 'empty_canvas', canvas))

        # refresh canvas
        canvas.refresh()
        while not canvas.isDrawing():
            app.processEvents()
        while canvas.isDrawing():
            app.processEvents()

        # now we expect the canvas check to fail (since they'll be a new polygon rendered over it)
        self.assertFalse(self.canvasImageCheck('empty_canvas', 'empty_canvas', canvas))

# 需要导入模块: from qgis.gui import QgsMapCanvas [as 别名]
# 或者: from qgis.gui.QgsMapCanvas import width [as 别名]
    def testPosition(self):
        """ test that map canvas annotation item syncs position correctly """
        a = QgsTextAnnotation()
        a.setFrameSizeMm(QSizeF(300 / 3.7795275, 200 / 3.7795275))
        a.setFrameOffsetFromReferencePointMm(QPointF(40 / 3.7795275, 50 / 3.7795275))
        a.setMapPosition(QgsPointXY(12, 34))
        a.setMapPositionCrs(QgsCoordinateReferenceSystem(4326))

        canvas = QgsMapCanvas()
        canvas.setDestinationCrs(QgsCoordinateReferenceSystem(4326))
        canvas.setFrameStyle(0)
        canvas.resize(600, 400)
        canvas.show()

        canvas.setExtent(QgsRectangle(10, 30, 20, 35))

        i = QgsMapCanvasAnnotationItem(a, canvas)
        self.assertEqual(canvas.width(), 600)
        self.assertEqual(canvas.height(), 400)

        # test that correct initial position is set
        self.assertAlmostEqual(i.pos().x(), 120, 1)
        self.assertAlmostEqual(i.pos().y(), 110, 1)

        # shift annotation map position, check that item is moved
        a.setMapPosition(QgsPointXY(14, 32))
        self.assertAlmostEqual(i.pos().x(), 240, 1)
        self.assertAlmostEqual(i.pos().y(), 230, 1)

        # check relative position
        a.setHasFixedMapPosition(False)
        a.setRelativePosition(QPointF(0.8, 0.4))
        self.assertAlmostEqual(i.pos().x(), 480, 1)
        self.assertAlmostEqual(i.pos().y(), 160, 1)

        # flicking between relative and fixed position
        a.setHasFixedMapPosition(True)
        self.assertAlmostEqual(i.pos().x(), 240, 1)
        self.assertAlmostEqual(i.pos().y(), 230, 1)
        a.setHasFixedMapPosition(False)
        self.assertAlmostEqual(i.pos().x(), 480, 1)
        self.assertAlmostEqual(i.pos().y(), 160, 1)

# 需要导入模块: from qgis.gui import QgsMapCanvas [as 别名]
# 或者: from qgis.gui.QgsMapCanvas import width [as 别名]
    def testRefreshOnTimer(self):
        """ test that map canvas refreshes with auto refreshing layers """
        canvas = QgsMapCanvas()
        canvas.setDestinationCrs(QgsCoordinateReferenceSystem(4326))
        canvas.setFrameStyle(0)
        canvas.resize(600, 400)
        self.assertEqual(canvas.width(), 600)
        self.assertEqual(canvas.height(), 400)

        layer = QgsVectorLayer("Polygon?crs=epsg:4326&field=fldtxt:string",
                               "layer", "memory")

        canvas.setLayers([layer])
        canvas.setExtent(QgsRectangle(10, 30, 20, 35))
        canvas.show()

        # need to wait until first redraw can occur (note that we first need to wait till drawing starts!)
        while not canvas.isDrawing():
            app.processEvents()
        canvas.waitWhileRendering()
        self.assertTrue(self.canvasImageCheck('empty_canvas', 'empty_canvas', canvas))

        # add polygon to layer
        f = QgsFeature()
        f.setGeometry(QgsGeometry.fromRect(QgsRectangle(5, 25, 25, 45)))
        self.assertTrue(layer.dataProvider().addFeatures([f]))

        # set auto refresh on layer
        layer.setAutoRefreshInterval(100)
        layer.setAutoRefreshEnabled(True)

        timeout = time.time() + 1
        # expect canvas to auto refresh...
        while not canvas.isDrawing():
            app.processEvents()
            self.assertTrue(time.time() < timeout)
        while canvas.isDrawing():
            app.processEvents()
            self.assertTrue(time.time() < timeout)

        # add a polygon to layer
        f = QgsFeature()
        f.setGeometry(QgsGeometry.fromRect(QgsRectangle(5, 25, 25, 45)))
        self.assertTrue(layer.dataProvider().addFeatures([f]))
        # wait for canvas auto refresh
        while not canvas.isDrawing():
            app.processEvents()
            self.assertTrue(time.time() < timeout)
        while canvas.isDrawing():
            app.processEvents()
            self.assertTrue(time.time() < timeout)

        # now canvas should look different...
        self.assertFalse(self.canvasImageCheck('empty_canvas', 'empty_canvas', canvas))

        # switch off auto refresh
        layer.setAutoRefreshEnabled(False)
        timeout = time.time() + 0.5
        while time.time() < timeout:
            # messy, but only way to check that canvas redraw doesn't occur
            self.assertFalse(canvas.isDrawing())

# 需要导入模块: from qgis.gui import QgsMapCanvas [as 别名]
# 或者: from qgis.gui.QgsMapCanvas import width [as 别名]
    def testMapTheme(self):
        canvas = QgsMapCanvas()
        canvas.setDestinationCrs(QgsCoordinateReferenceSystem(4326))
        canvas.setFrameStyle(0)
        canvas.resize(600, 400)
        self.assertEqual(canvas.width(), 600)
        self.assertEqual(canvas.height(), 400)

        layer = QgsVectorLayer("Polygon?crs=epsg:4326&field=fldtxt:string",
                               "layer", "memory")
        # add a polygon to layer
        f = QgsFeature()
        f.setGeometry(QgsGeometry.fromRect(QgsRectangle(5, 25, 25, 45)))
        self.assertTrue(layer.dataProvider().addFeatures([f]))

        # create a style
        sym1 = QgsFillSymbol.createSimple({'color': '#ffb200'})
        renderer = QgsSingleSymbolRenderer(sym1)
        layer.setRenderer(renderer)

        canvas.setLayers([layer])
        canvas.setExtent(QgsRectangle(10, 30, 20, 35))
        canvas.show()

        # need to wait until first redraw can occur (note that we first need to wait till drawing starts!)
        while not canvas.isDrawing():
            app.processEvents()
        canvas.waitWhileRendering()
        self.assertTrue(self.canvasImageCheck('theme1', 'theme1', canvas))

        # add some styles
        layer.styleManager().addStyleFromLayer('style1')
        sym2 = QgsFillSymbol.createSimple({'color': '#00b2ff'})
        renderer2 = QgsSingleSymbolRenderer(sym2)
        layer.setRenderer(renderer2)
        layer.styleManager().addStyleFromLayer('style2')

        canvas.refresh()
        canvas.waitWhileRendering()
        self.assertTrue(self.canvasImageCheck('theme2', 'theme2', canvas))

        layer.styleManager().setCurrentStyle('style1')
        canvas.refresh()
        canvas.waitWhileRendering()
        self.assertTrue(self.canvasImageCheck('theme1', 'theme1', canvas))

        # OK, so all good with setting/rendering map styles
        # try setting canvas to a particular theme

        # make some themes...
        theme1 = QgsMapThemeCollection.MapThemeRecord()
        record1 = QgsMapThemeCollection.MapThemeLayerRecord(layer)
        record1.currentStyle = 'style1'
        record1.usingCurrentStyle = True
        theme1.setLayerRecords([record1])

        theme2 = QgsMapThemeCollection.MapThemeRecord()
        record2 = QgsMapThemeCollection.MapThemeLayerRecord(layer)
        record2.currentStyle = 'style2'
        record2.usingCurrentStyle = True
        theme2.setLayerRecords([record2])

        QgsProject.instance().mapThemeCollection().insert('theme1', theme1)
        QgsProject.instance().mapThemeCollection().insert('theme2', theme2)

        canvas.setTheme('theme2')
        canvas.refresh()
        canvas.waitWhileRendering()
        self.assertTrue(self.canvasImageCheck('theme2', 'theme2', canvas))

        canvas.setTheme('theme1')
        canvas.refresh()
        canvas.waitWhileRendering()
        self.assertTrue(self.canvasImageCheck('theme1', 'theme1', canvas))

        # add another layer
        layer2 = QgsVectorLayer("Polygon?crs=epsg:4326&field=fldtxt:string",
                                "layer2", "memory")
        f = QgsFeature()
        f.setGeometry(QgsGeometry.fromRect(QgsRectangle(5, 25, 25, 45)))
        self.assertTrue(layer2.dataProvider().addFeatures([f]))

        # create a style
        sym1 = QgsFillSymbol.createSimple({'color': '#b2ff00'})
        renderer = QgsSingleSymbolRenderer(sym1)
        layer2.setRenderer(renderer)

        # rerender canvas - should NOT show new layer
        canvas.refresh()
        canvas.waitWhileRendering()
        self.assertTrue(self.canvasImageCheck('theme1', 'theme1', canvas))
        # test again - this time refresh all layers
        canvas.refreshAllLayers()
        canvas.waitWhileRendering()
        self.assertTrue(self.canvasImageCheck('theme1', 'theme1', canvas))

        # add layer 2 to theme1
        record3 = QgsMapThemeCollection.MapThemeLayerRecord(layer2)
        theme1.setLayerRecords([record3])
        QgsProject.instance().mapThemeCollection().update('theme1', theme1)
#.........这里部分代码省略.........

# 需要导入模块: from qgis.gui import QgsMapCanvas [as 别名]
# 或者: from qgis.gui.QgsMapCanvas import width [as 别名]
class WidgetResult(Ui_widgetResult, QWidget):
    """
    Widget (Panel) for result review
    """
    
    ''' buffer around clicked point for point in polygon query ''' 
    SEARCH_BUFFER = 20.0
    ''' supported export formats '''
    EXPORT_FORMATS = {
        get_ui_string("app.extension.shapefile"):ExportTypes.Shapefile,
        #get_ui_string("app.extension.kml"):ExportTypes.KML,
        #get_ui_string("app.extension.nrml"):ExportTypes.NRML,
        get_ui_string("app.extension.csv"):ExportTypes.CSV,
    };
    ''' enumeration of Layer to be previewed '''
    EXPOSURE, SURVEY, POP_GRID, FOOTPRINT, ZONES = range(5);
    ''' name for Layer to be previewed '''
    LAYER_NAMES = [
        get_ui_string("widget.result.layer.exposure"),        
        get_ui_string("widget.result.layer.survey"),
        get_ui_string("widget.result.layer.popgrid"),
        get_ui_string("widget.result.layer.footprint"),        
        get_ui_string("widget.result.layer.zones"),
    ];    
    LAYER_STYLES = [
        '<!DOCTYPE renderer><renderer-v2 symbollevels="0" type="singleSymbol"><symbols><symbol outputUnit="MM" alpha="1" type="fill" name="0"><layer pass="0" class="SimpleLine" locked="0"><prop k="capstyle" v="square"/><prop k="color" v="0,0,0,255"/><prop k="customdash" v="5;2"/><prop k="joinstyle" v="bevel"/><prop k="offset" v="0"/><prop k="penstyle" v="solid"/><prop k="use_custom_dash" v="0"/><prop k="width" v="0.26"/></layer></symbol></symbols><rotation field=""/><sizescale field=""/></renderer-v2>',
        '<!DOCTYPE renderer><renderer-v2 symbollevels="0" type="singleSymbol"><symbols><symbol outputUnit="MM" alpha="1" type="marker" name="0"><layer pass="0" class="SimpleMarker" locked="0"><prop k="angle" v="0"/><prop k="color" v="0,0,255,255"/><prop k="color_border" v="0,0,255,255"/><prop k="name" v="circle"/><prop k="offset" v="0,0"/><prop k="size" v="2"/></layer></symbol></symbols><rotation field=""/><sizescale field=""/></renderer-v2>',
        '<!DOCTYPE renderer><renderer-v2 symbollevels="0" type="singleSymbol"><symbols><symbol outputUnit="MM" alpha="1" type="marker" name="0"><layer pass="0" class="SimpleMarker" locked="0"><prop k="angle" v="0"/><prop k="color" v="0,255,0,255"/><prop k="color_border" v="0,255,0,255"/><prop k="name" v="rectangle"/><prop k="offset" v="0,0"/><prop k="size" v="4"/></layer></symbol></symbols><rotation field=""/><sizescale field=""/></renderer-v2>',
        '<!DOCTYPE renderer><renderer-v2 symbollevels="0" type="singleSymbol"><symbols><symbol outputUnit="MM" alpha="1" type="fill" name="0"><layer pass="0" class="SimpleFill" locked="0"><prop k="color" v="170,250,170,255"/><prop k="color_border" v="0,0,0,255"/><prop k="offset" v="0,0"/><prop k="style" v="solid"/><prop k="style_border" v="solid"/><prop k="width_border" v="0.26"/></layer></symbol></symbols><rotation field=""/><sizescale field=""/></renderer-v2>',
        '<!DOCTYPE renderer><renderer-v2 symbollevels="0" type="singleSymbol"><symbols><symbol outputUnit="MM" alpha="1" type="fill" name="0"><layer pass="0" class="SimpleFill" locked="0"><prop k="color" v="211,211,158,200"/><prop k="color_border" v="0,0,0,255"/><prop k="offset" v="0,0"/><prop k="style" v="solid"/><prop k="style_border" v="solid"/><prop k="width_border" v="0.26"/></layer></symbol></symbols><rotation field=""/><sizescale field=""/></renderer-v2>',
    ]
    
    # constructor / destructor
    ###############################
    
    def __init__(self, app):
        """
        constructor
        - initialize UI elements
        - connect UI elements to callback            
        """
        super(WidgetResult, self).__init__()
        self.ui = Ui_widgetResult()
        self.ui.setupUi(self)
                
        # create canvas
        self.canvas = QgsMapCanvas(self.ui.widget_map)
        self.canvas.setGeometry(
            0,                                                                # x
            self.ui.widget_map_menu_l.x()+self.ui.widget_map_menu_l.height(), # y  
            self.ui.widget_map.width() - 2*UI_PADDING,  # width
            self.ui.widget_map.width() - 2*UI_PADDING   # height
            )
        
        self.canvas.setCanvasColor(Qt.white)
        self.canvas.enableAntiAliasing(True)
        self.canvas.mapRenderer().setProjectionsEnabled(True)
        self.canvas.mapRenderer().setDestinationCrs(QgsCoordinateReferenceSystem(4326, QgsCoordinateReferenceSystem.PostgisCrsId))
        self.canvas.zoomNextStatusChanged.connect(self.checkRendering)
        self.canvas.xyCoordinates.connect(self.currentLocation)
        self.registry = QgsMapLayerRegistry.instance()
        
        self.map_layers = [None] * len(self.LAYER_NAMES)
        self.map_layer_renderer = [None] * len(self.LAYER_NAMES)
        for idx, str_style in enumerate(self.LAYER_STYLES):
            rdoc = QDomDocument("renderer")
            rdoc.setContent(str_style)        
            self.map_layer_renderer[idx] = QgsFeatureRendererV2.load(rdoc.firstChild().toElement())

        # populate export list
        self.ui.cb_export_format.clear()
        for export_format in self.EXPORT_FORMATS.keys():
            self.ui.cb_export_format.addItem(export_format)
                    
        # style object required for QgsRendererV2PropertiesDialog
        self.style = QgsStyleV2()
        
        # create the map tools
        self.toolPan = QgsMapToolPan(self.canvas)
        self.toolZoomIn = QgsMapToolZoom(self.canvas, False) # false = in
        self.toolZoomOut = QgsMapToolZoom(self.canvas, True) # true = out
        self.toolInfo = QgsMapToolEmitPoint(self.canvas)
        self.toolInfo.canvasClicked.connect(self.showInfo)
        self.canvas.setMapTool(self.toolPan)
        
        # additional         
        self.dlgResultDetail = DialogResult()
        self.dlgResultDetail.setModal(True)

        # set link to application main controller
        self.app = app
        
        # reset project
        self._project = None
        
        # default export setting
        self.export_format = ExportTypes.Shapefile
        
        # connect slots (ui event)
        self.ui.btn_zoom_full.clicked.connect(self.mapZoomFull)
#.........这里部分代码省略.........