placement rules should be followed when solving the pal labeling engine
solution.
For new projects it defaults to version 2, but when loading an older project
version 1 is used.
This allows changes to be made to the label placement problem solving without
affecting the placement of labels in existing projects.
from project labeling settings
This is an unnecessary setting, resulting in 1000's of extra, very complex
and untested lines of code. Furthermore, the differences are almost non-existant
and it's extremely unlikely end users would (or should) need to change this
setting.
methods
While unused for now, this gives us flexibility in future to specify
additional useful contextual information about how a callout should
be rendered without breaking API (e.g. label text alignment, label
font settings, etc)
And replace labeling engine dialog "Draw text as outlines" checkbox with a combobox
presenting the choice of always rendering as outlines OR text.
(This will allow us to easily add additional methods in future, e.g. potentially
a "Render as text wherever possible" setting, for defaulting to text objects
whenever it doesn't impact the rendering quality to do so)
