We're creating the variable but then requesting the 0th element from the list each time... That can be more logical and more efficient.
Contributes to issue CURA-4243.
CURA-4348
- If no project is loaded beforehand and then a model file is loaded,
the job name should be determined with the current machine name and
the first loaded model name.
- If a project is loaded, the job name should be the same as the project
name, and it should not change until another project is loaded.
It would try to override extruders that weren't thare. This was caused by the previous
change that would always load the extruders, but that should only happen for new machines, not for
overrides.
CURA-4204
When a new material is created during project file loading, the material
for each stack is set according to the parent material ID, but actually
the child material should be used. This fix uses a hack to find the
corresponding child material for a stack so when a user chooses to
create a new material during project file loading, the material can be
correctly set.
CURA-4107
In old Cura, there is no definitionChanges container, so loading a
project file from an old version will result in stacks with empty
defnitionChanges. This will cause an unnecessary auto-slice problem when
we switch between the extruder tabs for the first time. This action will
trigger a piece code in MachineAction which creates a definitionChanges
container for the active stack if it is empty. This eventually triggers
a propertyChanged signal and results in an unncessary auto-slicing.
CURA-4167
Custom FDM printers have multiple extruder stacks by default but not all
of them may be used. The actual number of extruders depends on what's
defined in the global stack. Because in the current architecture,
single-extrusion machines don't have extruder stacks, in project
loading, the extruder count in the global stack should be used so these
cases can be handled properly.
CURA-4053
An old project file doesn't have the definition_changes container in the
stacks. When this is the case, Cura should also check if the definition
changes container in an existing stack is empty or not for project file
loading conflict detection.