mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-26 00:02:08 -05:00
c49b5b777f
Rationale: - there was a lot of large objects passed by value, so potentially there's a speed bump from this - even for implicitly shared classes like QString/QList there's still a (small) cost for copying the objects when there's no reason to - it's the right thing to do!
50 lines
1.7 KiB
Plaintext
50 lines
1.7 KiB
Plaintext
/** A generic dialog for building expression strings
|
|
* @remarks This class also shows an example on how to use QgsExpressionBuilderWidget
|
|
*/
|
|
class QgsExpressionBuilderDialog : QDialog
|
|
{
|
|
%TypeHeaderCode
|
|
#include <qgsexpressionbuilderdialog.h>
|
|
%End
|
|
|
|
public:
|
|
QgsExpressionBuilderDialog( QgsVectorLayer* layer, const QString& startText = QString(), QWidget* parent /TransferThis/ = NULL, const QString& key = "generic",
|
|
const QgsExpressionContext& context = QgsExpressionContext() );
|
|
|
|
/** The builder widget that is used by the dialog */
|
|
QgsExpressionBuilderWidget* expressionBuilder();
|
|
|
|
void setExpressionText( const QString& text );
|
|
|
|
QString expressionText();
|
|
|
|
/** Returns the expression context for the dialog. The context is used for the expression
|
|
* preview result and for populating the list of available functions and variables.
|
|
* @see setExpressionContext
|
|
* @note added in QGIS 2.12
|
|
*/
|
|
QgsExpressionContext expressionContext() const;
|
|
|
|
/** Sets the expression context for the dialog. The context is used for the expression
|
|
* preview result and for populating the list of available functions and variables.
|
|
* @param context expression context
|
|
* @see expressionContext
|
|
* @note added in QGIS 2.12
|
|
*/
|
|
void setExpressionContext( const QgsExpressionContext& context );
|
|
|
|
/** Sets geometry calculator used in distance/area calculations. */
|
|
void setGeomCalculator( const QgsDistanceArea & da );
|
|
|
|
protected:
|
|
/**
|
|
* Is called when the dialog get accepted or rejected
|
|
* Used to save geometry
|
|
*
|
|
* @param r result value (unused)
|
|
*/
|
|
virtual void done( int r );
|
|
|
|
virtual void accept();
|
|
};
|