QGIS API Documentation 3.43.0-Master (b60ef06885e)
qgslabelpointsettings.cpp
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1/***************************************************************************
2 qgslabelpointsettings.cpp
3 ----------------------------
4 Date : May 2024
5 Copyright : (C) 2024 by Nyall Dawson
6 Email : nyall dot dawson at gmail dot com
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
17#include "moc_qgslabelpointsettings.cpp"
20#include "qgspallabeling.h"
21
22
24{
25 // TODO -- ideally quadrant and ordered positions would also be evaluated here,
26 // but they have been left in their original evaluation location for now to avoid
27 // any unforeseen unwanted side effects...
29 {
30 context.setOriginalValueVariable( mMaximumDistance );
31 mMaximumDistance = properties.valueAsDouble( QgsPalLayerSettings::Property::MaximumDistance, context, mMaximumDistance );
32 }
33}
double valueAsDouble(int key, const QgsExpressionContext &context, double defaultValue=0.0, bool *ok=nullptr) const
Calculates the current value of the property with the specified key and interprets it as a double.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
void setOriginalValueVariable(const QVariant &value)
Sets the original value variable value for the context.
void updateDataDefinedProperties(const QgsPropertyCollection &properties, QgsExpressionContext &context)
Updates the point settings to respect any data defined properties set within the specified properties...
@ MaximumDistance
Maximum distance of label from feature.
A grouped map of multiple QgsProperty objects, each referenced by an integer key value.
bool isActive(int key) const final
Returns true if the collection contains an active property with the specified key.