def testSymbolExpressionRender(self):
"""Test expressions embedded in legend node text"""
point_path = os.path.join(TEST_DATA_DIR, 'points.shp')
point_layer = QgsVectorLayer(point_path, 'points', 'ogr')
layout = QgsPrintLayout(QgsProject.instance())
layout.setName('LAYOUT')
layout.initializeDefaults()
map = QgsLayoutItemMap(layout)
map.attemptSetSceneRect(QRectF(20, 20, 80, 80))
map.setFrameEnabled(True)
map.setLayers([point_layer])
layout.addLayoutItem(map)
map.setExtent(point_layer.extent())
legend = QgsLayoutItemLegend(layout)
legend.setTitle("Legend")
legend.attemptSetSceneRect(QRectF(120, 20, 100, 100))
legend.setFrameEnabled(True)
legend.setFrameStrokeWidth(QgsLayoutMeasurement(2))
legend.setBackgroundColor(QColor(200, 200, 200))
legend.setTitle('')
legend.setLegendFilterByMapEnabled(False)
legend.setStyleFont(QgsLegendStyle.Title, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setStyleFont(QgsLegendStyle.Group, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setStyleFont(QgsLegendStyle.Subgroup, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setStyleFont(QgsLegendStyle.Symbol, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setStyleFont(QgsLegendStyle.SymbolLabel, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setAutoUpdateModel(False)
QgsProject.instance().addMapLayers([point_layer])
s = QgsMapSettings()
s.setLayers([point_layer])
group = legend.model().rootGroup().addGroup("Group [% 1 + 5 %] [% @layout_name %]")
layer_tree_layer = group.addLayer(point_layer)
counterTask = point_layer.countSymbolFeatures()
counterTask.waitForFinished()
layer_tree_layer.setCustomProperty("legend/title-label",
'bbbb [% 1+2 %] xx [% @layout_name %] [% @layer_name %]')
QgsMapLayerLegendUtils.setLegendNodeUserLabel(layer_tree_layer, 0, 'xxxx')
legend.model().refreshLayerLegend(layer_tree_layer)
layer_tree_layer.setLabelExpression('Concat(@symbol_id, @symbol_label, count("Class"))')
legend.model().layerLegendNodes(layer_tree_layer)[0].setUserLabel(' sym 1')
legend.model().layerLegendNodes(layer_tree_layer)[1].setUserLabel('[%@symbol_count %]')
legend.model().layerLegendNodes(layer_tree_layer)[2].setUserLabel('[% count("Class") %]')
layout.addLayoutItem(legend)
legend.setLinkedMap(map)
legend.updateLegend()
print(layer_tree_layer.labelExpression())
map.setExtent(QgsRectangle(-102.51, 41.16, -102.36, 41.30))
checker = QgsLayoutChecker(
'composer_legend_symbol_expression', layout)
checker.setControlPathPrefix("composer_legend")
sleep(4)
result, message = checker.testLayout()
self.assertTrue(result, message)
QgsProject.instance().removeMapLayers([point_layer.id()])
def deduplicate_legend_entries(iface,
raster_layer,
criteria,
unique_class_row_indexes=None,
expand=None):
"""Remove duplicate entries from layer legend.
:param iface: QGIS interface
:type iface: QgisInterface
:param raster_layer: raster layer
:type raster_layer: QgsRasterLayer
:param criteria: classification criteria: label for the legend band
:type criteria: str
:param unique_class_row_indexes: list of 1-indexed unique entries, defaults to None
:type unique_class_row_indexes: list, optional
:param expand: whether to expand the legend, defaults to None
:type expand: any, optional
"""
assert iface is not None
model = iface.layerTreeView().layerTreeModel()
root = QgsProject.instance().layerTreeRoot()
node = root.findLayer(raster_layer.id())
if unique_class_row_indexes is None:
unique_class_row_indexes = [0]
renderer = raster_layer.renderer()
unique_labels = []
idx = 1
# Get classes from renderer
if isinstance(raster_layer.renderer(), QgsPalettedRasterRenderer):
classes = renderer.classes()
elif isinstance(raster_layer.renderer(),
QgsSingleBandPseudoColorRenderer):
shader = raster_layer.renderer().shader()
if shader:
colorRampShaderFcn = shader.rasterShaderFunction()
if colorRampShaderFcn:
classes = colorRampShaderFcn.colorRampItemList()
else:
rat_log('Unsupported renderer for layer %s' % raster_layer,
Qgis.Critical)
return
for klass in classes:
if klass.label not in unique_labels:
unique_labels.append(klass.label)
unique_class_row_indexes.append(idx)
idx += 1
rat_log(
f'Deduplicating legend entries for layer {raster_layer.name()}: {unique_class_row_indexes}'
)
QgsMapLayerLegendUtils.setLegendNodeOrder(node, unique_class_row_indexes)
QgsMapLayerLegendUtils.setLegendNodeUserLabel(node, 0, criteria)
model.refreshLayerLegend(node)
if expand is not None:
node.setExpanded(True)
def testExpressionInText(self):
"""Test expressions embedded in legend node text"""
point_path = os.path.join(TEST_DATA_DIR, 'points.shp')
point_layer = QgsVectorLayer(point_path, 'points', 'ogr')
layout = QgsPrintLayout(QgsProject.instance())
layout.setName('LAYOUT')
layout.initializeDefaults()
map = QgsLayoutItemMap(layout)
map.attemptSetSceneRect(QRectF(20, 20, 80, 80))
map.setFrameEnabled(True)
map.setLayers([point_layer])
layout.addLayoutItem(map)
map.setExtent(point_layer.extent())
legend = QgsLayoutItemLegend(layout)
legend.setTitle("Legend")
legend.attemptSetSceneRect(QRectF(120, 20, 100, 100))
legend.setFrameEnabled(True)
legend.setFrameStrokeWidth(QgsLayoutMeasurement(2))
legend.setBackgroundColor(QColor(200, 200, 200))
legend.setTitle('')
legend.setLegendFilterByMapEnabled(False)
legend.setStyleFont(QgsLegendStyle.Title, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setStyleFont(QgsLegendStyle.Group, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setStyleFont(QgsLegendStyle.Subgroup, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setStyleFont(QgsLegendStyle.Symbol, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setStyleFont(QgsLegendStyle.SymbolLabel, QgsFontUtils.getStandardTestFont('Bold', 16))
legend.setAutoUpdateModel(False)
QgsProject.instance().addMapLayers([point_layer])
s = QgsMapSettings()
s.setLayers([point_layer])
group = legend.model().rootGroup().addGroup("Group [% 1 + 5 %] [% @layout_name %]")
layer_tree_layer = group.addLayer(point_layer)
layer_tree_layer.setCustomProperty("legend/title-label", 'bbbb [% 1+2 %] xx [% @layout_name %] [% @layer_name %]')
QgsMapLayerLegendUtils.setLegendNodeUserLabel(layer_tree_layer, 0, 'xxxx')
legend.model().refreshLayerLegend(layer_tree_layer)
legend.model().layerLegendNodes(layer_tree_layer)[0].setUserLabel('bbbb [% 1+2 %] xx [% @layout_name %] [% @layer_name %]')
layout.addLayoutItem(legend)
legend.setLinkedMap(map)
map.setExtent(QgsRectangle(-102.51, 41.16, -102.36, 41.30))
checker = QgsLayoutChecker(
'composer_legend_expressions', layout)
checker.setControlPathPrefix("composer_legend")
result, message = checker.testLayout()
self.assertTrue(result, message)
QgsProject.instance().removeMapLayers([point_layer.id()])
def set_legend(layout: QgsPrintLayout, tree: QgsLayerTree, layer: QgsLayer, item_id: str):
'''Sets the Legend items'''
logging.info(f'setting legend: {item_id}')
item = layout.itemById(item_id)
# set layer as root for legend
tree.addLayer(layer)
model = item.model()
model.setRootGroup(tree)
root = model.rootGroup().findLayer(layer)
# hide the node title
QgsLegendRenderer.setNodeLegendStyle(root, QgsLegendStyle.Hidden)
# hide the node with label: Band 1 (Gray)
if isinstance(layer, QgsRasterLayer):
nodes = model.layerLegendNodes(root)
if nodes[0].data(0) == 'Band 1 (Gray)':
indexes = list(range(1, len(nodes)))
QgsMapLayerLegendUtils.setLegendNodeOrder(root, indexes)
model.refreshLayerLegend(root)
