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Make results of wxDC::DrawEllipticArc() consistent across all platforms.

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And also consistent with wxGraphicsContext method with the same name.

Document the rules determining what is drawn.

Closes #4437.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78125 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2014-11-11 01:02:14 +00:00
parent f9637c9626
commit 8b72652a28
5 changed files with 25 additions and 18 deletions
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10
interface/wx/dc.h
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@@ -356,12 +356,14 @@ public:
@a width and @a height specify the width and height of the rectangle
that contains the ellipse.
@a start and @a end specify the start and end of the arc relative to
@a start and @a end specify the end points of the arc relative to
the three-o'clock position from the center of the rectangle. Angles are
specified in degrees with 0 degree angle corresponding to the positive
horizontal axis (3 o'clock) direction. Positive values mean
counter-clockwise motion. If @a start is equal to @e end, a complete
ellipse will be drawn.
horizontal axis (3 o'clock) direction.
Independently of whether @a start is greater than or less than @a end,
the arc is drawn in the counter-clockwise direction. Also, if @a start
is equal to @e end, a complete ellipse is drawn.
Notice that unlike DrawArc(), this function does not draw the lines to
the arc ends, even when using non-transparent brush.