[MPlayer-dev-eng] [PATCH] GUI: Implement a true rotary potmeter

[Ingo Brückl]

I wrote on Thu, 03 Apr 2014 08:59:47 +0200:

> I'm going to make some source changes now in order to prepare it.

Here is an elaborated version of the patch working in radian now which saves
some operations and makes it easier to understand (e.g. when looking up atan2
and radian in the wiki).

You can already test with the plastic skin when setting the required data
using

  static void g (guiItem *item)
  {
    double end;
    item->zeropoint = appRadian(item, 48, 52);
    end = appRadian(item, 60, 25);
    item->arclength = end - item->zeropoint;
    if (item->arclength <= 0.0) item->arclength += 2 * M_PI;
  }

and g(item) right after case itRPotmeter in main.c.

Comments?

Ingo
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