[jfreechart-dev] [ jfreechart-Patches-2517134 ] Charts with fixed data area size

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Patches item #2517134, was opened at 2009-01-18 13:13
Message generated for change (Comment added) made by paradoxoff
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Peter Kolb (paradoxoff)
Assigned to: Nobody/Anonymous (nobody)
Summary: Charts with fixed data area size

Initial Comment:
The patch allows to set a fixed size for the data area. Based on this size, a preferred size for the plot and for the chart are calculated. These "preferred sizes" are recalculated if required. Based on the preferred chart area size, a retangle can be constructed and used as parameter in the JFreeChart.draw(...) methods to get a chart with a data area of the desired, constant size.
Changes have been made to JFreeChart, Plot, XYPlot and ChartPanel. The ChartPanel has a flag to indicate whether the preferred chart size should be honored. If that is the case, changing the size of the chart panel has no effect on the chart itself.
If the ChartPanel is placed in a JScrollPane, things work as expected, i.e. the scroll pane honors the increasing chart panel size if axes/titles are added. Placing the ChartPanel in the content pane of a JFrame is somewhat "unstable", and the JFrame is not always resized as needed.
The ZIP contains a demo program. 

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>Comment By: Peter Kolb (paradoxoff)
Date: 2009-04-28 23:38

Message:
- Patched against 1.0.13
- Added calculatePreferredPlotAreaSize to the CategoryPlot class.
- Added a double fixedCategoryWidth and boolean useFixedCategoryWidth to
the CategoryPlot class. These parameters can be used to ensure that the
width of a category is fixed and that the data area of the plot grows when
more categories are added.
- Added missing initial value for fixedPlotAreaSize in the JFreeChart
class (used to be null unless explicitly set)
- Changed the calculation of the preferredChartAreaSize in the JFreeChart
class. If the chart should use a fixedPlotAreaSize, it is now checked
whether the plot uses a fixedDataAreaSize. If that is the case, the
preferredPlotAreaSize from the plot is obtained, otherwise the
fixedPlotAreaSize is used.
- Changed the ChartPanel class: the preferredChartAreaSize is not only
considered in the paintComponent method to set the size of the ChartPanel,
but is also checked when the chart is transferred to the clipboard.
- The archive contains two demo programs, one for the XYPlot class, one
for the CategoryPlot class.
- 

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Comment By: Peter Kolb (paradoxoff)
Date: 2009-03-09 23:20

Message:
New demo program. The different flags are set in order to show the desired
effect in the chart panel.
File Added: FixedDataAreaSizeDemo.java

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Comment By: Peter Kolb (paradoxoff)
Date: 2009-03-09 23:19

Message:
New demo program. The different flags are set in order to show the desired
effect in the chart panel.
File Added: FixedDataAreaSizeDemo.java

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Comment By: Peter Kolb (paradoxoff)
Date: 2009-03-05 21:17

Message:
The ChartPanel code was broken (paintFixedComponent was still there for
some reason, and the preferred size of the chart was never really used).
File Added: FixedDataAndPlotArea_corr.diff

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Comment By: Peter Kolb (paradoxoff)
Date: 2009-01-18 23:33

Message:
New DIFF file without paintFixedComponent-method in the ChartPanel class.
Zooming did not work for some reason. Now, both cases (old behaviour and
adjustement according to the preferred size of the JFreeChart) are treated
in a single paintComponent.
JFreeChart has an additional flag useFixedChartAreaSize.
File Added: FixedDataAndPlotArea.diff

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