The old version of the device toolbar was a complex situation. Because
of the fact that device properties can take significant time to query,
this put an unpleasant burden on the UI thread; so to fix this problem,
the device toolbar was made to be threaded. However, threading is a
complex and dangerous thing, and there is a fear that this could cause
complications down the line whenever users are simply selecting devices.
So for the time being, as a safety precaution, simplify the device
toolbar down to just the "activate" button, and make it so that if users
really need to query and change the devices, that they need to
explicitly open the properties. That way the devices aren't being
queried constantly every time a device source is selected.
Alternatively in the future, device enumeration could be cached, but
seeing as that's a significant amount of work and needs to take in to
account whether a user adds/removes a device while the process is
active, that's not going to happen any time soon.
Because devices can take significant time to enumerate, defer the
properties creation to a separate thread. The author of this commit
feels a great amount of displeasure over having to write this.
The source toolbar allows quick and easy access to properties and
filers, and shows common properties/features of a source type. For
example, when you select a media source, VLC source, or the slideshow
source, you'll get media controls to control playback of the media. If
you select a text source you can edit the font, color, or text if
applicable. Or if you select a capture source, you can select the
display/window/etc to capture for that source.
If the source toolbar is not desired and is viewed as taking up valuable
space in the window, it can be disabled via the view menu.
Co-authored-by: Clayton Groeneveld <claytong1214@gmail.com>
Co-authored-by: Jim <obs.jim@gmail.com>
