A huge optimization that ensures only the parts of a node graph that have
changed get pushed to the renderer. For thread-safety, the node graph is
copied elsewhere so that users can make changes asynchronously and the graph
can update when its threads are ready. Up until now, if an input value changed,
every node's values would be re-copied, or worse, if a connection was changed,
the entire graph would be recopied. This has been negligible in testing since
we've been largely testing with small graphs, but for massive projects, it's
important that this be as optimized as possible.
Also includes general improvements to the slider widget such as an optional
"autotrim" function to cut off trailing zeroes, a "format" string that's easier
to internationalize, and general tidiness.
Improves Preferences dialog's "accept" speed. Before it would try changing the
style no matter what which took a noticeable amount of time to do for no real
purpose if the style didn't change.
We used to use a somewhat convoluted process of multithreading since refreshing
the devices could take some time. Now we use the high-level QtConcurrent API
which reduces much of the complexity on our end and makes the code more
manageable.
This required various changes to various parts of the infrastructure (mostly
using paths to finding the "root project" of any given object throughout).
Now theoretically infinite projects can be opened and accounted for at any
given time.
Using QSizePolicys seemed to always produce some variant of the IntegerSlider
and QSlider consuming roughly half of the width each. The IntegerSlider is only
two characters wide at any one time so this results in a lot of wasted screen
real estate. This commit limits the integer slider to 4 characters wide (more
than 2 to allow for UI padding)
Ensures filenames end with the appropriate extension (necessary for
communicating the output format to both FFmpeg and OIIO) and moves overwrite
check from file dialog to render since it's still possible to type the
intended filename. Also checks the intended output directory and creates it
if it doesn't already exist.
itsmattkc