Class BIRTChartComputation
java.lang.Object
org.eclipse.birt.chart.computation.BIRTChartComputation
- All Implemented Interfaces:
IChartComputation
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
applyWrapping
(IDisplayServer xs, Label la, double dWrapping) Apply the wrapping to a label.computeBox
(IDisplayServer xs, int iLabelLocation, Label la, double dX, double dY) Compute the bounding box ( location and size ) of a label.double
computeFontHeight
(IDisplayServer xs, Label la) Convenient method to compute the font's height of a label.double
computeHeight
(IDisplayServer xs, Label la) Compute the height of a label.computeLabelSize
(IDisplayServer xs, Label la, double dWrapping, Double fontHeight) Compute the size of a label.computePolygon
(IDisplayServer xs, int iLabelLocation, Label la, double dX, double dY, Double fontHeight) Compute the bounding polygon of a label.double
computeWidth
(IDisplayServer xs, Label la) Compute the width of a label.void
dispose()
getTextMetrics
(IDisplayServer xs, Label la, double wrapping) Returns a text metrics.void
Dispose the text metrics.
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Constructor Details
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BIRTChartComputation
public BIRTChartComputation()
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Method Details
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computeFontHeight
Description copied from interface:IChartComputation
Convenient method to compute the font's height of a label. This computation is costly, but in most case we do not change the font of a label, we just change the string value, so the font height will not changed. The purpose of the method is to get the font height overhead for reusing.- Specified by:
computeFontHeight
in interfaceIChartComputation
- Returns:
- font height
- Throws:
ChartException
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getTextMetrics
Description copied from interface:IChartComputation
Returns a text metrics.- Specified by:
getTextMetrics
in interfaceIChartComputation
- Returns:
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computeLabelSize
public BoundingBox computeLabelSize(IDisplayServer xs, Label la, double dWrapping, Double fontHeight) throws ChartException Description copied from interface:IChartComputation
Compute the size of a label.- Specified by:
computeLabelSize
in interfaceIChartComputation
- Returns:
- Throws:
ChartException
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computeBox
public BoundingBox computeBox(IDisplayServer xs, int iLabelLocation, Label la, double dX, double dY) throws ChartException Description copied from interface:IChartComputation
Compute the bounding box ( location and size ) of a label.- Specified by:
computeBox
in interfaceIChartComputation
- Returns:
- Throws:
ChartException
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computePolygon
public RotatedRectangle computePolygon(IDisplayServer xs, int iLabelLocation, Label la, double dX, double dY, Double fontHeight) throws ChartException Description copied from interface:IChartComputation
Compute the bounding polygon of a label.- Specified by:
computePolygon
in interfaceIChartComputation
- Returns:
- Throws:
ChartException
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computeWidth
Description copied from interface:IChartComputation
Compute the width of a label.- Specified by:
computeWidth
in interfaceIChartComputation
- Returns:
- Throws:
ChartException
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computeHeight
Description copied from interface:IChartComputation
Compute the height of a label.- Specified by:
computeHeight
in interfaceIChartComputation
- Returns:
- Throws:
ChartException
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dispose
public void dispose()- Specified by:
dispose
in interfaceIChartComputation
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applyWrapping
Description copied from interface:IChartComputation
Apply the wrapping to a label.- Specified by:
applyWrapping
in interfaceIChartComputation
- Throws:
ChartException
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recycleTextMetrics
Description copied from interface:IChartComputation
Dispose the text metrics.- Specified by:
recycleTextMetrics
in interfaceIChartComputation
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