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from qgis.core import *
from qgis.PyQt.QtCore import *
from qgis.PyQt.QtXml import *
import re
from qgis.gui import *
MDF_DOCKTREEMODELDATA = 'application/enmapbox.docktreemodeldata'
MDF_DOCKTREEMODELDATA_XML = 'dock_tree_model_data'
MDF_DATASOURCETREEMODELDATA = 'application/enmapbox.datasourcetreemodeldata'
MDF_DATASOURCETREEMODELDATA_XML = 'data_source_tree_model_data'
MDF_LAYERTREEMODELDATA = 'application/qgis.layertreemodeldata'
MDF_LAYERTREEMODELDATA_XML = 'layer_tree_model_data'
MDF_PYTHON_OBJECTS = 'application/enmapbox/objectreference'
MDF_SPECTRALPROFILE = 'application/enmapbox/spectralprofile'
MDF_SPECTRALLIBRARY = 'application/enmapbox/spectrallibrary'
MDF_URILIST = 'text/uri-list'
MDF_TEXT_HTML = 'text/html'
MDF_TEXT_PLAIN = 'text/plain'
def attributesd2dict(attributes):
d = {}
assert isinstance(attributes, QDomNamedNodeMap)
for i in range(attributes.count()):
attribute = attributes.item(i)
d[attribute.nodeName()] = attribute.nodeValue()
return d
def fromLayerList(mapLayers):
"""
Converts a list of QgsMapLayers into a QMimeData object
:param mapLayers: [list-of-QgsMapLayers]
:return: QMimeData
"""
for lyr in mapLayers:
assert isinstance(lyr, QgsMapLayer)
tree = QgsLayerTree()
mimeData = QMimeData()
urls = []
for l in mapLayers:
tree.addLayer(l)
urls.append(QUrl.fromLocalFile(l.source()))
doc = QDomDocument()
context = QgsReadWriteContext()
node = doc.createElement(MDF_LAYERTREEMODELDATA_XML)
doc.appendChild(node)
for c in tree.children():
c.writeXml(node, context)
mimeData.setData(MDF_LAYERTREEMODELDATA, doc.toByteArray())
return mimeData
def toLayerList(mimeData):
"""
Extracts a layer-tree-group from a QMimeData
:param mimeData: QMimeData
:return: QgsLayerTree
"""
supported = [MDF_LAYERTREEMODELDATA, MDF_DATASOURCETREEMODELDATA]
assert isinstance(mimeData, QMimeData)
newMapLayers = []
if MDF_LAYERTREEMODELDATA in mimeData.formats():
doc = QDomDocument()
doc.setContent(mimeData.data(MDF_LAYERTREEMODELDATA))
xml = doc.toString()
node = doc.firstChildElement(MDF_LAYERTREEMODELDATA_XML)
context = QgsReadWriteContext()
#context.setPathResolver(QgsProject.instance().pathResolver())
layerTree = QgsLayerTree.readXml(node, context)
lt = QgsLayerTreeGroup.readXml(node, context)
#layerTree.resolveReferences(QgsProject.instance(), True)
registeredLayers = QgsProject.instance().mapLayers()
attributesLUT= {}
childs = node.childNodes()
for i in range(childs.count()):
child = childs.at(i).toElement()
if child.tagName() == 'layer-tree-layer':
attributesLUT[child.attribute('id')] = attributesd2dict(child.attributes())
for treeLayer in layerTree.findLayers():
assert isinstance(treeLayer, QgsLayerTreeLayer)
mapLayer = treeLayer.layer()
if isinstance(mapLayer, QgsMapLayer):
s = ""
if not isinstance(mapLayer, QgsMapLayer):
id = treeLayer.layerId()
if id in registeredLayers.keys():
mapLayer = registeredLayers[id]
elif id in attributesLUT.keys():
attributes = attributesLUT[id]
if attributes['providerKey'] == 'gdal':
mapLayer = QgsRasterLayer(attributes['source'])
elif attributes['providerKey'] == 'ogr':
mapLayer = QgsVectorLayer(attributes['source'])
else:
s = ""
if isinstance(mapLayer, QgsMapLayer):
mapLayer.setName(attributes['name'])
if isinstance(mapLayer, QgsMapLayer):
newMapLayers.append(mapLayer)
elif MDF_URILIST in mimeData.formats():
pass
else:
s = ""
return newMapLayers
def textToByteArray(text):
"""
Converts input into a QByteArray
:param text: bytes or str
:return: QByteArray
"""
if isinstance(text, QDomDocument):
return textToByteArray(text.toString())
else:
data = QByteArray()
data.append(text)
return data
def textFromByteArray(data):
"""
Decodes a QByteArray into a str
:param data: QByteArray
:return: str
"""
assert isinstance(data, QByteArray)
s = data.data().decode()
return s