[kscd] [Bug 333500] KsCD UI is awful

[Jonathan Wakely]

https://bugs.kde.org/show_bug.cgi?id=333500

--- Comment #4 from Jonathan Wakely <zilla at kayari.org> ---
(In reply to comment #0)
> The rotary volume control might look like a real stereo volume knob, but
> it's a crappy abstraction on a computer desktop, a linear slider is a lot
> easier to use

The way rotary pots work in typical music software, such as digital audio
workstations, is that once you click on it moving upwards rotates clockwise and
moving downwards rotates anti-clockwise. Any horizontal motion is ignored, only
vertical motion affects the controller. This allows them to give the visual
appearance of a rotary controller, but be significantly easier to control with
a mouse or touchscreen, because you only ever move up and down, the direction
to move the mouse doesn't depend on the current value (you want it louder, move
upwards, you want it quieter, move downwards - simple).

The KsCD volume knob requires you to actually move in an arc, if you try moving
simply up and down the knob will turn one way or another (depending on its
starting position), until it reaches a point where it stops turning. To make
fine adjustments to the knob requires quite fine movement with the mouse in a
smooth arc - not easy if you use a trackball instead of a mouse.

Either the rotary control should be made easier to use or it should be replaced
with a slider (as in the mockup in comment 2)

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