本文整理汇总了Python中qgis.core.QgsLayerDefinition.loadLayerDefinition方法的典型用法代码示例。如果您正苦于以下问题:Python QgsLayerDefinition.loadLayerDefinition方法的具体用法?Python QgsLayerDefinition.loadLayerDefinition怎么用?Python QgsLayerDefinition.loadLayerDefinition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.core.QgsLayerDefinition
的用法示例。
在下文中一共展示了QgsLayerDefinition.loadLayerDefinition方法的4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: load_qlr_file
# 需要导入模块: from qgis.core import QgsLayerDefinition [as 别名]
# 或者: from qgis.core.QgsLayerDefinition import loadLayerDefinition [as 别名]
def load_qlr_file(self, path):
# Load qlr into a group owned by us
try:
group = QgsLayerTreeGroup()
# On Windows this locks the parent dirs indefinitely
# See http://hub.qgis.org/issues/14811
# QgsLayerDefinition.loadLayerDefinition(path, group)
# Instead handle file ourselves
f = QFile(path)
if not f.open(QIODevice.ReadOnly):
return False
try:
doc = QDomDocument()
if not doc.setContent( f.readAll() ):
return False
QgsLayerDefinition.loadLayerDefinition(doc, group)
finally:
f.close()
# Get subtree of nodes
nodes = group.children()
# plain list of nodes
nodeslist = []
for addedNode in nodes:
internalid = self._random_string()
nodeinfo = {'internalid': internalid}
addedNode.setCustomProperty(QlrManager.customPropertyName, internalid)
if isinstance(addedNode, QgsLayerTreeGroup):
nodeinfo['type'] = 'group'
nodeinfo['name'] = addedNode.name()
elif isinstance(addedNode, QgsLayerTreeLayer):
nodeinfo['type'] = 'layer'
nodeinfo['name'] = addedNode.layerName()
nodeinfo['layerid'] = addedNode.layerId()
nodeslist.append(nodeinfo)
# Remove from parent node. Otherwise we cant add it to a new parent
group.takeChild(addedNode)
self.fileSystemItemToLegendNode[path] = nodeslist
# Insert them into the main project
QgsProject.instance().layerTreeRoot().insertChildNodes(0, nodes)
return True
except:
# For now just return silently
return False
示例2: testVectorAndRaster
# 需要导入模块: from qgis.core import QgsLayerDefinition [as 别名]
# 或者: from qgis.core.QgsLayerDefinition import loadLayerDefinition [as 别名]
def testVectorAndRaster(self):
# Load a simple QLR containing a vector layer and a raster layer.
QgsProject.instance().removeAllMapLayers()
layers = QgsProject.instance().mapLayers()
self.assertEqual(len(layers), 0)
(result, errMsg) = QgsLayerDefinition.loadLayerDefinition(TEST_DATA_DIR + '/vector_and_raster.qlr', QgsProject.instance(), QgsProject.instance().layerTreeRoot())
self.assertTrue(result)
layers = QgsProject.instance().mapLayers()
self.assertEqual(len(layers), 2)
QgsProject.instance().removeAllMapLayers()
示例3: testInvalidSource
# 需要导入模块: from qgis.core import QgsLayerDefinition [as 别名]
# 或者: from qgis.core.QgsLayerDefinition import loadLayerDefinition [as 别名]
def testInvalidSource(self):
# Load a QLR containing a vector layer with a broken path
QgsProject.instance().removeAllMapLayers()
layers = QgsProject.instance().mapLayers()
self.assertEqual(len(layers), 0)
(result, errMsg) = QgsLayerDefinition.loadLayerDefinition(TEST_DATA_DIR + '/invalid_source.qlr', QgsProject.instance(), QgsProject.instance().layerTreeRoot())
self.assertTrue(result)
self.assertFalse(errMsg)
layers = QgsProject.instance().mapLayers()
self.assertEqual(len(layers), 1)
self.assertFalse(list(layers.values())[0].isValid())
QgsProject.instance().removeAllMapLayers()
示例4: test_layerDefinitionRewriteId
# 需要导入模块: from qgis.core import QgsLayerDefinition [as 别名]
# 或者: from qgis.core.QgsLayerDefinition import loadLayerDefinition [as 别名]
def test_layerDefinitionRewriteId(self):
tmpfile = os.path.join(tempfile.tempdir, "test.qlr")
ltr = QgsProject.instance().layerTreeRoot()
self.pointsLayer.setDependencies([QgsMapLayerDependency(self.linesLayer.id())])
QgsLayerDefinition.exportLayerDefinition(tmpfile, [ltr])
grp = ltr.addGroup("imported")
QgsLayerDefinition.loadLayerDefinition(tmpfile, grp)
newPointsLayer = None
newLinesLayer = None
for l in grp.findLayers():
if l.layerId().startswith('points'):
newPointsLayer = l.layer()
elif l.layerId().startswith('lines'):
newLinesLayer = l.layer()
self.assertFalse(newPointsLayer is None)
self.assertFalse(newLinesLayer is None)
self.assertTrue(newLinesLayer.id() in [dep.layerId() for dep in newPointsLayer.dependencies()])
self.pointsLayer.setDependencies([])