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https://issues.apache.org/jira/browse/PIVOT-697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13022005#comment-13022005
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Taro App commented on PIVOT-697:
--------------------------------
Here are some more findings:
On Windows note PC (default LCD anti-alias mode,) Java renders English text
anti-aliased, but renders Japanese text anti-aliased only when the font size is
larger than 20pt (http://itpro.nikkeibp.co.jp/article/COLUMN/20070205/260649/),
however, if non-rectangle clipping is applied, small Japanese font is also
anti-aliased somehow. I confirmed this with a simple test case without Pivot.
If default anti-alias is set to off with awt.useSystemAAFontSettings system
property, text is not anti-aliased even with non-rectangle clipping. I wonder
if this behavior is expected or a bug in Java2D, but it is consistent as I
tested with WindowsXP / JDK1.6.0_18 and Windows7 / JDK1.6.0_24.
So this issue is not a bug in Pivot, but there's no workaround for Pivot users
on Windows except to turn off anti-alias completely. For Pivot to workaround
this issue, just have to add two lines of code to make clipping areas
rectangular:
org.apache.pivot.wtk.skin.TextAreaSkinParagraphView.java
----------------------------------------
public void paint(Graphics2D graphics) {
...
// Determine the selected and unselected areas
Area selection = textAreaSkin.getSelection();
Area selectedArea =
selection.createTransformedArea(AffineTransform.getTranslateInstance(-x, -y));
selectedArea.intersect(new Area(new Rectangle2D.Float(0, 0, width, height)));
// workaround for PIVOT-697
Area unselectedArea = new Area();
unselectedArea.add(new Area(new Rectangle2D.Float(0, 0, width, height)));
unselectedArea.subtract(new Area(selectedArea));
unselectedArea.intersect(new Area(new Rectangle2D.Float(0, 0, width, height)));
// workaround for PIVOT-697
...
}
----------------------------------------
Can you add this workaround code to Pivot?
> Font looks different when text is selected across multiple lines in TextArea
> ----------------------------------------------------------------------------
>
> Key: PIVOT-697
> URL: https://issues.apache.org/jira/browse/PIVOT-697
> Project: Pivot
> Issue Type: Bug
> Affects Versions: 2.0
> Environment: Windows XP SP3, JDK 1.6.0_18, Japanese
> Reporter: Taro App
> Priority: Minor
> Fix For: 2.0.1
>
> Attachments: NotePadComparison-MultipleLineSelectEnglish.png,
> NotePadComparison-MultipleLineSelectJapanese.png,
> Test1.SingleLineSelectEnglish.png, Test2.MultipleLineSelectEnglish.png,
> Test3.SingleLineSelectJapanese.png, Test4.MultipleLineSelectJapanese.png,
> TextAreaFontTestEnglish.java, TextAreaFontTestJapanese.java
>
>
> Font looks different when text is selected across multiple lines in TextArea.
> When the selection is within a single line, font looks the same.
> For English text, this font change is subtle and can be ignored.
> For Japanese text, this font change is obvious and looks weird.
> I'm not sure if this is platform dependent or font dependent.
> May have something to do with how Java2D renders fonts.
> I will attach screen shots and test codes.
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