Besides discrete automation it's now possible to setup interpolation
modes such as linear and cubic-hermite.
Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>
Possible endless loop if these two state variables are not intialized.
Now a line will have the origin of (0,0) if drawn (shift-click) without
previously clicking on a starting spot. Perhaps not the best fix, but
it works. And I think allowing this first line (instead of blocking it)
is better for the enabling the user to accidently discover the feature.
Conflicts:
src/gui/AutomationEditor.cpp
Added a one-window-mode which allows to have only one instrument track
window open at a time. The content of this window is replaced each time
you open a different track.
Furthermore added global reception and forwarding of key events to the
piano widget of the top-most instrument track window. This for example
enables the user to play test sounds while tweaking some effects in a
different subwindow.
(cherry picked from commit 93681760d2)
