Mercurial > MadButterfly

annotate pyink/unlink_clone.py @ 1532:4a92b639a1cd

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Clear selection set when switching current scene. To clear selection set after switching away from current to another scene. It avoids Inkscape select on nodes they are not saw after switching.
author Thinker K.F. Li <thinker@codemud.net>
date Fri, 30 Sep 2011 12:31:33 +0800
parents 0b5ee9c90af7
children
rev   line source
1299
6949e2b6cae2 Add unlink clone checker.
Thinker K.F. Li <thinker@codemud.net>
parents:
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1 import dom_event
6949e2b6cae2 Add unlink clone checker.
Thinker K.F. Li <thinker@codemud.net>
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2 from data_monitor import data_monitor
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3
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2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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4 ## \brief Tracking relation-ship btween copy nodes and source nodes.
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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5 #
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Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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6 # To trace the relation-ship between source node and copy node, we add
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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7 # 'ns0:duplicate-src' attribute to copy nodes. But after unlink a
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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8 # clone node, inkscape does not copy attributes of 'svg:use' node to
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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9 # new nodes inserted after unlinking. So, we can not just putting
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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10 # 'ns0:duplicate-src' on 'svg:use' and hoping it is still working for
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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11 # us after unlinking.
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Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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12 #
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Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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13 # The solution is to duplicate value of 'id' attribute to 'saved_id'
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Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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14 # attribute for every node. Whenever Inkscape copying nodes for a
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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15 # copy & paste or an unlinking, the value of 'saved_id' attribute
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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16 # would be copied to copy nodes from source nodes. We copy the value
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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17 # of 'saved_id' attribute to 'ns0:duplicate-src', for copy node, to
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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18 # preserve the relation-ship of copy node and source node. After copy
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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19 # 'saved_id' to 'ns0:duplicate-src', 'saved_id' is re-assigned to the
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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20 # value of ID of copy node. A copy node is the new node of a copying.
2a35a1cb6cdf Add comment for unlink_clone.py
Thinker K.F. Li <thinker@codemud.net>
parents: 1299
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21 #
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22 class unlink_clone_checker(object):
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23 __metaclass__ = data_monitor
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24
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25 _no_change_attrs = ('ns0:duplicate-src', 'saved_id')
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26
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27 def __init__(self, domview_ui):
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28 self._domviewui = domview_ui
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29 self._locker = domview_ui
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Thinker K.F. Li <thinker@codemud.net>
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30 self._doc = None
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31 self._root = None
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32 pass
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33
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34 def _start_check(self):
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35 doc = self._doc
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36 dom_event.addEventListener(doc, 'DOMNodeInserted',
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37 self.do_insert_node, None)
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38 dom_event.addEventListener(doc, 'DOMAttrModified',
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39 self.do_attr_modified, None)
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40 pass
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41
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42 def handle_doc_root(self, doc, root):
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43 self._doc = doc
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44 self._root = root
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45
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46 self._start_check()
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47 pass
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48
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49 def _handle_unlinked_or_copied_nodes(self, node, child):
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50 try:
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51 saved_id = child.getAttribute('saved_id')
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52 except: # Skip it for losting saved_id
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53 pass
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54 else:
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55 child.setAttribute('ns0:duplicate-src', saved_id)
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56 pass
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57
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58 try:
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59 child_id = child.getAttribute('id')
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60 except: # still have no ID.
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61 pass # Assign saved_id later with attr
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62 # modified event.
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63 else:
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64 child.setAttribute('saved_id', child_id)
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65 pass
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66 pass
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67
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68 def _handle_new_nodes(self, node, child):
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69 if child.name() == 'svg:use':
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70 return
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71
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72 try:
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73 child_id = child.getAttribute('id')
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74 except KeyError:
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75 return
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76 child.setAttribute('saved_id', child_id)
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77 pass
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78
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79 ## \brief Check inserted node recurisvely.
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80 #
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81 # Travel the tree in post-order.
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82 #
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83 def _handle_insert_node_recursive(self, node, child):
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84 #
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85 # Traveling forest of children.
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86 #
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87 for cchild in child.childList():
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88 self._handle_insert_node_recursive(child, cchild)
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89 pass
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90
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91 #
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92 # Visit the node
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93 #
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94 try:
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95 child_id = child.getAttribute('saved_id')
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96 except KeyError: # have no saved_id
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97 pass
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98 else:
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99 self._handle_unlinked_or_copied_nodes(node, child)
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100 return
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101
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102 # have no saved_id
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103 self._handle_new_nodes(node, child)
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104 pass
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105
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106 def do_insert_node(self, node, child):
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107 self._handle_insert_node_recursive(node, child)
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108 pass
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109
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110 def do_attr_modified(self, node, name, old_value, new_value):
1336
0b5ee9c90af7 Update components and timelines list for async changes on DOM
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111 if name == 'id' and node.name() != 'svg:use' and new_value:
1299
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112 #
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113 # The ID of a node may not be assigned when it being
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114 # inserted, and be assigned later. So, we checking
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115 # attribute modification event to assign value of
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116 # saved_id.
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117 #
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118 node.setAttribute('saved_id', new_value)
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119 elif old_value and (name in self._no_change_attrs):
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120 #
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121 # Restore to old value for attributes that is not allowed
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122 # to be changed by the user.
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123 #
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124 node.setAttribute(name, old_value)
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125 pass
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126 pass
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127 pass