def restorePlacementEE(self, obj):
# only attempt this on fully restored objects
if self.isLoaded(obj) and obj.LinkedObject.isValid():
# if it's indeed an Asm4 object
# LCS_Origin.Placement * AttachmentOffset * varTmpDoc_3#LCS_Origin.Placement ^ -1
if Asm4.isAsm4EE(obj) and (obj.SolverId == 'Asm4EE' or obj.SolverId
== 'Placement::ExpressionEngine'):
# retrieve the info from the object's properties
(a_Link, sep, a_LCS) = obj.AttachedTo.partition('#')
if a_Link == 'Parent Assembly':
a_Part = None
else:
a_Part = obj.Document.getObject(
a_Link).LinkedObject.Document.Name
l_Part = obj.LinkedObject.Document.Name
l_LCS = obj.AttachedBy[1:]
# build the expression
expr = Asm4.makeExpressionPart(a_Link, a_Part, a_LCS, l_Part,
l_LCS)
# set the expression
obj.setExpression('Placement', expr)
def Apply( self ):
# get the instance to attach to:
# it's either the top level assembly or a sister App::Link
if self.parentList.currentText() == 'Parent Assembly':
a_Link = 'Parent Assembly'
a_Part = None
elif self.parentList.currentIndex() > 1:
parent = self.parentTable[ self.parentList.currentIndex() ]
a_Link = parent.Name
a_Part = parent.LinkedObject.Document.Name
else:
a_Link = None
a_Part = None
# the attachment LCS's name in the parent
# check that something is selected in the QlistWidget
if self.attLCSlist.selectedItems():
a_LCS = self.attLCStable[ self.attLCSlist.currentRow() ].Name
else:
a_LCS = None
# the linked App::Part's name
l_Part = self.selectedObj.LinkedObject.Document.Name
# the LCS's name in the linked part to be used for its attachment
# check that something is selected in the QlistWidget
if self.partLCSlist.selectedItems():
#l_LCS = self.partLCSlist.selectedItems()[0].text()
l_LCS = self.partLCStable[ self.partLCSlist.currentRow() ].Name
else:
l_LCS = None
# check that all of them have something in
# constrName has been checked at the beginning
if a_Link and a_LCS and l_Part and l_LCS :
# add the Asm4 properties if it's a pure App::Link
Asm4.makeAsmProperties(self.selectedObj)
# self.selectedObj.AssemblyType = 'Part::Link'
self.selectedObj.AttachedBy = '#'+l_LCS
self.selectedObj.AttachedTo = a_Link+'#'+a_LCS
self.selectedObj.SolverId = 'Placement::ExpressionEngine'
# build the expression for the ExpressionEngine
# this is where all the magic is, see:
#
# https://forum.freecadweb.org/viewtopic.php?p=278124#p278124
#
# as of FreeCAD v0.19 the syntax is different:
# https://forum.freecadweb.org/viewtopic.php?f=17&t=38974&p=337784#p337784
#
# expr = ParentLink.Placement * ParentPart#LCS.Placement * constr_LinkName.AttachmentOffset * LinkedPart#LCS.Placement ^ -1'
# expr = LCS_in_the_assembly.Placement * constr_LinkName.AttachmentOffset * LinkedPart#LCS.Placement ^ -1'
expr = Asm4.makeExpressionPart( a_Link, a_Part, a_LCS, l_Part, l_LCS )
# load the expression into the link's Expression Engine
self.selectedObj.setExpression('Placement', expr )
# recompute the object to apply the placement:
self.selectedObj.recompute()
self.rootAssembly.recompute(True)
return True
else:
FCC.PrintWarning("Problem in selections\n")
return False