Qwt TODO list

5.3.x)
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1) Histogram
2) Interval Curve (including error bars)
3) Curve with z value displayed as colors
4) Curves for financial charts, box-whisker
6) QwtData + functors
7) QwtData/QwtPlotCurve + Level of details (Douglas Peucker)
8) Include adopted MathML code
9) Common zoom stack for all navigation objects
10) Watermark Item

6.0.x)
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1) Drop Qt3 Compatibility

6.1.x)
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1) Using doubles for layout/paint calculations
2) Improve Documention
4) QAbstractModel -> QwtSeriesData
5) Cleanup of all widgets using QGradient and friends
6) Thread support for rendering spectrograms

Other ideas
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1) OpenGL plot canvas
2) Time/Date scale engine
4) TeX texts
5) Grid of QwtPlots
6) Interval scale labels ( between 2 ticks )
7) More than 4 axes
8) QwtPlotLegendItem
9) Qwt Jambi
10) Qt 4.5 + reintroduced raster operations
11) QwtSymbol/QwtIntervalSymbol + QPainterPath

Bugs/Change requests
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1) QwtScaleWidget: Aligned/Opposite modes for the title
2) QwtPlotDict, performance of z sorting
3) setAlignCanvasToScales(true) + 2 X-Axes layout bug
4) Layout init of round scales too late.
5) Pen width + symbols
