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From "Roger Lee Whitcomb (Jira)" <j...@apache.org>
Subject [jira] [Commented] (PIVOT-1060) Inconsistencies with font measurement on some platforms
Date Tue, 13 Apr 2021 18:53:00 GMT

    [ https://issues.apache.org/jira/browse/PIVOT-1060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17320467#comment-17320467
] 

Roger Lee Whitcomb commented on PIVOT-1060:
-------------------------------------------

In the screenshots, the top "Results" field is TextArea, while bottom "Expressions" is TextPane.
 It appears on Windows that the line spacing is different between these two components, even
using the exact same font, while on OSX the line spacing is the same, and agrees with NumberRuler.
 Will get the exact font metrics shortly for comparison.

> Inconsistencies with font measurement on some platforms
> -------------------------------------------------------
>
>                 Key: PIVOT-1060
>                 URL: https://issues.apache.org/jira/browse/PIVOT-1060
>             Project: Pivot
>          Issue Type: Bug
>          Components: wtk-terra
>         Environment: Windows 10 with 18 pt FontUtilities.MONOSPACED_FONTS (which could
be any of "Courier", "Courier New", "Andale Mono", "Monaco", "Menlo", or "MONOSPACED" depending
on platform).
>            Reporter: Roger Lee Whitcomb
>            Assignee: Roger Lee Whitcomb
>            Priority: Minor
>             Fix For: 2.1.0
>
>         Attachments: font_measure_osx.png, font_measure_windows.png
>
>
> Using a (new) NumberRuler with both TextArea and TextPane shows inconsistencies (only
on Windows that I can tell) between the font height and positioning between the ruler and
the two components. Specifically:
> * with TextPane the numbers are ~1 pix lower in ruler than in text
> * with TextArea the numbers in ruler are same ~1 pix lower on normal lines, BUT on wrapped
lines the TextArea seems to ignore leading so that the lines get higher and higher WRT ruler
> On OSX there seems to be none of the problems.



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