This PR places all LMMS symbols into namespaces to eliminate any potential future name collisions between LMMS and third-party modules.
Also, this PR changes back `LmmsCore` to `Engine`, reverting c519921306 .
Co-authored-by: allejok96 <allejok96@gmail.com>
* Rework PianoRoll paintEvent + some extras
* Split out PositionLine class to own file
* Refactor PianoRoll Q_PROPERTYs
* Reduce code by using Q_PROPERTY's MEMBER function and removing getter/setter functions
After looking at the getters and setters, they did nothing different than what direct
access would allow. Nothing outside of PianoRoll used the public functions as well.
Considering these factors we can reduce the number of functions by 2x the number of
Q_PROPERTIES, and go with direct access instead.
* Remove need for keyboard pixmaps
With the recent change to allow zooming vertically, aligning pixmaps is a PITA. Since
we have themes which can take brushes and colors, it would be simpler to take a solid
color or a gradient with some extra style properties to resize the keys and text colors.
While it will slightly be a downgrade from pixmaps since they can be anything really,
this will allow us to customize the piano roll further moving forward.
* Added the ability to update margins for TimeLineWidget and StepRecorderWidget
These take a X coordinate, which was hardcoded to WHITE_KEY_WIDTH, and never looked
back. Now we can adjust on the fly if we need to. Currently this just allows us to
shift the left margin to the style-defined white key width.
* Fix phantom pixmaps when PianoRoll not focused
* Update PositionLine class changes related to #5543
