本文整理汇总了Python中qgis.gui.QgsMapCanvas.stopRendering方法的典型用法代码示例。如果您正苦于以下问题：Python QgsMapCanvas.stopRendering方法的具体用法？Python QgsMapCanvas.stopRendering怎么用？Python QgsMapCanvas.stopRendering使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.gui.QgsMapCanvas的用法示例。
在下文中一共展示了QgsMapCanvas.stopRendering方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: testCancelAndDestroy
# 需要导入模块: from qgis.gui import QgsMapCanvas [as 别名]
# 或者: from qgis.gui.QgsMapCanvas import stopRendering [as 别名]
def testCancelAndDestroy(self):
""" test that nothing goes wrong if we destroy a canvas while a job is canceling """
canvas = QgsMapCanvas()
canvas.setDestinationCrs(QgsCoordinateReferenceSystem(4326))
canvas.setFrameStyle(0)
canvas.resize(600, 400)
layer = QgsVectorLayer("Polygon?crs=epsg:4326&field=fldtxt:string",
"layer", "memory")
# add a ton of features
for i in range(5000):
f = QgsFeature()
f.setGeometry(QgsGeometry.fromRect(QgsRectangle(5, 25, 25, 45)))
self.assertTrue(layer.dataProvider().addFeatures([f]))
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()
self.assertTrue(canvas.isDrawing())
canvas.stopRendering()
del canvas