def get_quantile_ramp_item_list(layer):
"""
Returns the quantile ramp item list and overrides the ramp items
labels with our custom categories.
We use a dummy shader function to help us with the quantile
classification
"""
stats = layer.dataProvider().bandStatistics(
1, QgsRasterBandStats.All)
min_val = stats.minimumValue
max_value = stats.maximumValue
colors = [
QColor('#4c724b'),
QColor('#89a167'),
QColor('#d9d98d'),
QColor('#b08d64'),
QColor('#8a514a')
]
dummy_shader = QgsColorRampShader(
minimumValue=min_val,
maximumValue=max_val,
colorRamp=QgsPresetSchemeColorRamp(colors=colors),
type=QgsColorRampShader.Discrete,
classificationMode=QgsColorRampShader.Quantile)
dummy_shader.classifyColorRamp(classes=5,
band=1,
input=layer.dataProvider())
labels = ['Very low', 'Low', 'Moderate', 'High', 'Very high']
ramp_items = []
for i, ramp_item in enumerate(dummy_shader.colorRampItemList()):
ramp_item.label = labels[i]
ramp_items.append(ramp_item)
return ramp_items
