Bug 63882 – [wx] Select controls with small quantity of options incorrectly draw scrollbars larger then the control itself (and other scrollbar oddities)

• Status: RESOLVED
• Resolution: WONTFIX
• Component: Forms

[Malcolm MacLeod]

Created attachment 99586 [details]
Patch to correct behaviour

When a select has only a few items the scrollbar is rendering larger then the control. For select controls with a large amount of items this is not an issue.
Furthermore e.g. a scrolling div with a small amount of items does not exhibit the same problem.

It seems that this is because the function wxRenderer_DrawScrollbar expects the current, max and step paramaters as pixel values but that in the case of Select objects the ScrollBar object instead uses "item" units internally e.g. a step of 1 item instead of 25 pixels, a maximum of 19 items instead of 300 pixels. These "item" values are passed into wxRenderer_DrawScrollbar as is which then confuses it. Instead these values should be converted into pixels before being passed to wxRenderer_DrawScrollbar.

I am attaching a patch which corrects this behaviour, as well as a small snippet of HTML to reproduce the problem.

[Malcolm MacLeod]

Created attachment 99587 [details]
testcase

[Ahmad Saleem]

Wx port is gone. So closing this as "RESOLVED WONTFIX".