61 lines
1.8 KiB
Python
61 lines
1.8 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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scenegraph.element.group
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"""
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# imports ####################################################################
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from . import Element
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from ._path import _bbox
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# group ######################################################################
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_empty_bbox = _bbox([])
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class Group(Element):
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tag = "g"
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_state_attributes = Element._state_attributes + [
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"children",
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]
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def __init__(self, children=None, **attributes):
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super(Group, self).__init__(**attributes)
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self.children = children if children is not None else []
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def _aabbox(self, transform, inheriteds):
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bboxes = (child.aabbox(transform, inheriteds) for child in self.children)
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return _bbox(bbox for bbox in bboxes if bbox != _empty_bbox)
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def _render(self, transform, inheriteds, context):
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for child in self.children:
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child.render(transform, inheriteds, context)
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def _pick_content(self, x, y, transform):
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hits = []
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for child in self.children:
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# print('Group._pick_content : child = %s' % str(child) )
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hits += child.pick(x, y, transform)
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# print('Group._pick_content : len(hits) = %d' % len(hits) )
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return hits
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def _xml_content(self, defs):
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return "\n".join(child._xml(defs) for child in self.children)
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def add_child(self, child):
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"""
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:param child: the new child to append to the list of children of this svg group
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:type child: a scenegraph.element.Element derived object
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"""
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self.children.append(child)
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child.parent = self
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# assert(child.parent == self)
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def remove_child(self, child_to_remove):
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self.children = [child for child in self.children if child is not child_to_remove]
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