Python EditCommand.keep_empty_group方法代码示例

# 需要导入模块: from command_support.EditCommand import EditCommand [as 别名]
# 或者: from command_support.EditCommand.EditCommand import keep_empty_group [as 别名]
    def keep_empty_group(self, group):
        """
        Returns True if the empty group should not be automatically deleted. 
        otherwise returns False. The default implementation always returns 
        False. Subclasses should override this method if it needs to keep the
        empty group for some reasons. Note that this method will only get called
        when a group has a class constant autdelete_when_empty set to True. 
        (and as of 2008-03-06, it is proposed that dna_updater calls this method
        when needed. 
        @see: Command.keep_empty_group() which is overridden here. 
        """

        bool_keep = EditCommand.keep_empty_group(self, group)

        if not bool_keep: 
            #Don't delete any DnaSegements or DnaGroups at all while 
            #in DnaDuplex_EditCommand. 
            #Reason: See BreakStrand_Command.keep_empty_group. In addition to 
            #this, this command can create multiple DnaSegments Although those 
            #won't be empty, it doesn't hurt in waiting for this temporary 
            #command to exit before deleting any empty groups.             
            if isinstance(group, self.assy.DnaSegment) or \
               isinstance(group, self.assy.DnaGroup):
                bool_keep = True

        return bool_keep

# 需要导入模块: from command_support.EditCommand import EditCommand [as 别名]
# 或者: from command_support.EditCommand.EditCommand import keep_empty_group [as 别名]
    def keep_empty_group(self, group):
        """
        Returns True if the empty group should not be automatically deleted.
        otherwise returns False. The default implementation always returns
        False. Subclasses should override this method if it needs to keep the
        empty group for some reasons. Note that this method will only get called
        when a group has a class constant autdelete_when_empty set to True.
        (and as of 2008-03-06, it is proposed that dna_updater calls this method
        when needed.
        @see: Command.keep_empty_group() which is overridden here.
        """

        bool_keep = EditCommand.keep_empty_group(self, group)

        if not bool_keep:
            #Lets just not delete *ANY* DnaGroup while in DnaDisplayStyle_Command
            #Although DnaDisplayStyle command can only be accessed through
            #BuildDna_EditCommand, it could happen (due to a bug) that the
            #previous command is not BuildDna_Editcommand. So bool_keep
            #in that case will return False propmting dna updater to even delete
            #the empty DnaGroup (if it becomes empty for some reasons) of the
            #BuildDna command. To avoid this ,this method will instruct
            # to keep all instances of DnaGroup even when they might be empty.
            if isinstance(group, self.assy.DnaGroup):
                bool_keep = True
            #Commented out code that shows what I was planning to implement
            #earlier.
            ##previousCommand = self.commandSequencer.prevMode # keep_empty_group: .struct
            ##if previousCommand.commandName == 'BUILD_DNA':
                ##if group is previousCommand.struct:
                    ##bool_keep = True

        return bool_keep

# 需要导入模块: from command_support.EditCommand import EditCommand [as 别名]
# 或者: from command_support.EditCommand.EditCommand import keep_empty_group [as 别名]
    def keep_empty_group(self, group):
        """
        Returns True if the empty group should not be automatically deleted. 
        otherwise returns False. The default implementation always returns 
        False. Subclasses should override this method if it needs to keep the
        empty group for some reasons. Note that this method will only get called
        when a group has a class constant autdelete_when_empty set to True. 
        (and as of 2008-03-06, it is proposed that dna_updater calls this method
        when needed. 
        @see: Command.keep_empty_group() which is overridden here. 
        @see: BreakStrands_Command.keep_empty_group
        @see: Group.autodelete_when_empty.. a class constant used by the 
              dna_updater (the dna updater then decides whether to call this 
              method to see which empty groups need to be deleted)
        """

        bool_keep = EditCommand.keep_empty_group(self, group)

        if not bool_keep:
            if self.hasValidStructure():
                if group is self.struct:
                    bool_keep = True
                elif group is self.struct.parent_node_of_class(self.assy.DnaGroup):
                    bool_keep = True
            # If this command doesn't have a valid structure, as a fall back,
            # lets instruct it to keep ALL the DnaGroup objects even when empty
            # Reason? ..see explanation in BreakStrands_Command.keep_empty_group
            elif isinstance(group, self.assy.DnaGroup):
                bool_keep = True

        return bool_keep

# 需要导入模块: from command_support.EditCommand import EditCommand [as 别名]
# 或者: from command_support.EditCommand.EditCommand import keep_empty_group [as 别名]
    def keep_empty_group(self, group):
        """
        Returns True if the empty group should not be automatically deleted.
        otherwise returns False. The default implementation always returns
        False. Subclasses should override this method if it needs to keep the
        empty group for some reasons. Note that this method will only get called
        when a group has a class constant autdelete_when_empty set to True.
        @see: Command.keep_empty_group() which is overridden here.
        """

        bool_keep = EditCommand.keep_empty_group(self, group)

        return bool_keep