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Wt
3.3.0
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Abstract base class for styling rendered data series in charts. More...
#include <Wt/Chart/WChartPalette>

Public Member Functions | |
| virtual | ~WChartPalette () |
| Destructor. | |
| virtual WBrush | brush (int index) const =0 |
| Returns a brush from the palette. | |
| virtual WPen | borderPen (int index) const =0 |
| Returns a border pen from the palette. | |
| virtual WPen | strokePen (int index) const =0 |
| Returns a stroke pen from the palette. | |
| virtual WColor | fontColor (int index) const =0 |
| Returns a font color from the palette. | |
Abstract base class for styling rendered data series in charts.
This class provides an interface for a palette which sets strokes and fill strokes for data in a chart. A palette is an ordered list of styles, which is indexed by the chart to get a suitable style for a particular series (in case of WCartesianChart) or data row (in case of WPieChart). Each style is defined by a brush, two pen styles (one for borders, and one for plain lines), and a font color that is appropriate for drawing text within the brushed area.
To use a custom palette, you should reimplement this class, and then use WAbstractChart::setPalette() to use an instance of the palette.
| virtual WPen Wt::Chart::WChartPalette::borderPen | ( | int | index | ) | const [pure virtual] |
Returns a border pen from the palette.
Returns the pen for stroking borders around an area filled using the brush at the same index.
Implemented in Wt::Chart::WStandardPalette.
| virtual WBrush Wt::Chart::WChartPalette::brush | ( | int | index | ) | const [pure virtual] |
Returns a brush from the palette.
Returns the brush for the style with given index.
Implemented in Wt::Chart::WStandardPalette.
| virtual WColor Wt::Chart::WChartPalette::fontColor | ( | int | index | ) | const [pure virtual] |
Returns a font color from the palette.
Returns a font color suitable for rendering text in the area filled with the brush at the same index.
Implemented in Wt::Chart::WStandardPalette.
| virtual WPen Wt::Chart::WChartPalette::strokePen | ( | int | index | ) | const [pure virtual] |
Returns a stroke pen from the palette.
Returns the pen for stroking lines for the style with given index.
Implemented in Wt::Chart::WStandardPalette.
1.7.5.1