本文整理汇总了Python中viewer.Viewer.layer_changed方法的典型用法代码示例。如果您正苦于以下问题：Python Viewer.layer_changed方法的具体用法？Python Viewer.layer_changed怎么用？Python Viewer.layer_changed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viewer.Viewer的用法示例。
在下文中一共展示了Viewer.layer_changed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: EarthMineQGIS
# 需要导入模块: from viewer import Viewer [as 别名]
# 或者: from viewer.Viewer import layer_changed [as 别名]
#.........这里部分代码省略.........
def layer_geometry_changed(self, layer, featureid, geometry):
if not self.viewer:
return
geomtype = layer.geometryType()
if geomtype == QGis.Point:
geom = geometry.asPoint()
transform = self.coordinatetransform(layer)
point = transform.transform(geom, QgsCoordinateTransform.ReverseTransform)
location = dict(lat=point.y(), lng=point.x())
self.viewer.edit_feature(layer.id(), featureid, [location])
elif geomtype == QGis.Line:
self.layer_feature_delete(layer, featureid)
self.layer_feature_added(layer, featureid)
def connect_layer_signals(self, layer):
if not layer.type() == QgsMapLayer.VectorLayer:
return
layer.featureAdded.connect(self._layer_feature_added)
layer.featureDeleted.connect(self._layer_feature_delete)
layer.editingStarted.connect(self.layer_editstate_changed)
layer.editingStopped.connect(self.layer_editstate_changed)
# HACK The new style doesn't work here
# http://hub.qgis.org/issues/6573
signal = SIGNAL("geometryChanged(QgsFeatureId, QgsGeometry&)")
self.connect(layer, signal, self._layer_geometry_changed)
self.load_layer_features(layers=[layer])
def layer_editstate_changed(self):
layer = self.sender()
if layer == self.iface.activeLayer():
self.viewer.layer_changed(layer)
def disconnect_signals(self):
self.disconnect_projectsignals()
for layer in maplayers():
if not layer.type() == QgsMapLayer.VectorLayer:
return
safe_disconnect(layer.featureAdded, self._layer_feature_added)
safe_disconnect(layer.featureDeleted, self._layer_feature_delete)
safe_disconnect(layer.editingStarted, self.layer_editstate_changed)
safe_disconnect(layer.editingStopped, self.layer_editstate_changed)
# HACK The new style doesn't work here
# http://hub.qgis.org/issues/6573
signal = SIGNAL("geometryChanged(QgsFeatureId, QgsGeometry&)")
self.disconnect(layer, signal, self._layer_geometry_changed)
def connect_signals(self):
for layer in maplayers():
self.connect_layer_signals(layer)
self.center_on_canvas()
def set_viewer_location(self, point, mousebutton):
transform = self.coordinatetransform()
point = transform.transform(point, QgsCoordinateTransform.ReverseTransform)
self.viewer.set_location(point)
def distancearea(self):
area = QgsDistanceArea()
dest = self.canvas.mapRenderer().destinationCrs()
area.setSourceCrs(dest)