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This adds a new histogram tab to the graduated renderer, which shows an interactive histogram of the values from the assigned field or expression. Class breaks can be moved or added using the histogram widget. A base class, QgsHistogramWidget, has been created to display histograms for a field or expression. In future this could be used to show a histogram within a "selection statistics" panel. Sponsored by ADUGA (http://www.aduga.org)
43 lines
1.2 KiB
Plaintext
43 lines
1.2 KiB
Plaintext
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/** \ingroup gui
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* \class QgsGraduatedHistogramWidget
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* \brief Graphical histogram for displaying distribution of field values and
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* editing range breaks for a QgsGraduatedSymbolRendererV2 renderer.
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*
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* \note Added in version 2.9
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*/
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class QgsGraduatedHistogramWidget : QWidget
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{
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%TypeHeaderCode
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#include <qgsgraduatedhistogramwidget.h>
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%End
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public:
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/** QgsGraduatedHistogramWidget constructor
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* @param parent parent widget
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*/
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QgsGraduatedHistogramWidget( QWidget *parent /TransferThis/ = 0 );
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~QgsGraduatedHistogramWidget();
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/** Sets the QgsGraduatedSymbolRendererV2 renderer associated with the histogram.
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* The histogram will fetch the ranges from the renderer before every refresh.
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* @param renderer associated QgsGraduatedSymbolRendererV2
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*/
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void setRenderer( QgsGraduatedSymbolRendererV2* renderer );
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signals:
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/** Emitted when the user modifies the graduated ranges using the histogram widget.
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* @param rangesAdded true if the user has added ranges, false if the user has just
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* modified existing range breaks
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*/
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void rangesModified( bool rangesAdded );
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protected:
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virtual void drawHistogram();
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};
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