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13693261870

2022-11-07 5daf4c21294132319770e27d9916fb12be0db7fe

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import os
import math
from qgis.core import *
from qgis.gui import *
from qgis.PyQt.QtGui import *
from qgis.PyQt.QtCore import *
from qgis.PyQt.QtWidgets import *
from qgis.PyQt.QtXml import *
 
 
def setChild(project, root, showLayers):
    print('Group: ' + root.name())
    for node in root.children():
        # QgsLayerTreeLayer
        if isinstance(node, QgsLayerTreeGroup):
            setChild(project, node, showLayers)
        # QgsRasterLayer, QgsVectorLayer
        else:
            name = node.layer().name()
            flag = name in showLayers
            print(str(flag) + ", " + name)
 
            if not flag:
                root.removeLayer(node.layer())
                # node.layer().setValid(False)
            # lyr.setSubLayerVisibility(name, flag)
 
 
QgsApplication.setPrefixPath(r"C:/Program Files/QGIS 3.16/bin", True)
qgs = QgsApplication([], True)
qgs.initQgis()
 
project = QgsProject.instance()
project.read(r'E:/terrait/TianJin/LFServer/QGIS/Test.qgz')
print("FileName: " + project.fileName())
 
# layout = QgsPrintLayout(project)
layout = QgsLayout(project)
# layout.initializeDefaults()
 
with open(r"E:/terrait/TianJin/LFServer/QGIS/Template.qpt", 'r', encoding='utf-8') as f:
    template_content = f.read()
doc = QDomDocument()
doc.setContent(template_content)
layout.loadFromTemplate(doc, QgsReadWriteContext(), True)
 
map = layout.itemById(r'地图')
print('1:' + str(math.ceil(map.scale())))
 
# "阀室", "站场", "管道中心线", "矢量注记", "矢量图", "影像注记", "影像图"
showLayers = ["站场", "管道中心线", "影像注记", "影像图"]
root = project.layerTreeRoot()
setChild(project, root, showLayers)
# for layer in project.mapLayers().values():
#     if isinstance(layer, QgsRasterLayer):
#         print(layer)
#     if isinstance(layer, QgsVectorLayer):
#         print(layer)
 
exporter = QgsLayoutExporter(layout)
img_path = os.path.join(r"E:/terrait/TianJin/LFServer/QGIS", "render.png")
exporter.exportToImage(img_path, QgsLayoutExporter.ImageExportSettings())
 
qgs.exitQgis()