mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-26 00:02:08 -05:00
d16cdcf449
This introduces two new options to filter legend elements: - filter by expression: a boolean expression can be set. Only symbols of features that make the expression evaluated to true will be kept in the legend - filter by polygon: only symbols of features that are inside the given polygon will be part of the legend. The polygon filtering is used in particular for a new option in the composer legend that allows to filter out anything that is not included in the current atlas polygon.
51 lines
1.2 KiB
Plaintext
51 lines
1.2 KiB
Plaintext
/** \ingroup gui
|
|
* \class QgsFilterLegendButton
|
|
* A tool button that allows to enable or disable legend filter by contents of the map.
|
|
* An additional pop down menu allows to define a boolean expression to refine the filtering.
|
|
* @note added in 2.14
|
|
*/
|
|
|
|
class QgsLegendFilterButton: public QToolButton
|
|
{
|
|
%TypeHeaderCode
|
|
#include <qgslegendfilterbutton.h>
|
|
%End
|
|
|
|
public:
|
|
/**
|
|
* Construct a new filter legend button
|
|
*
|
|
* @param parent The parent QWidget
|
|
*/
|
|
QgsLegendFilterButton( QWidget* parent = 0 );
|
|
~QgsLegendFilterButton();
|
|
|
|
/**
|
|
* Returns the current text used as filter expression
|
|
*/
|
|
QString expressionText() const;
|
|
|
|
/**
|
|
* Sets the current text used as filter expression.
|
|
* This will update the menu
|
|
*/
|
|
void setExpressionText( const QString& expression );
|
|
|
|
/**
|
|
* Returns the current associated vectorLayer
|
|
* May be null
|
|
*/
|
|
QgsVectorLayer* vectorLayer() const;
|
|
/**
|
|
* Sets the associated vectorLayer
|
|
* May be null
|
|
*/
|
|
void setVectorLayer( QgsVectorLayer* layer );
|
|
|
|
signals:
|
|
/**
|
|
* Emitted when the expression text changes
|
|
*/
|
|
void expressionTextChanged();
|
|
};
|