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Canvas: Add method to retrieve all child elements of a group.

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This commit is contained in:
Thomas Geymayer 2012-09-17 18:12:57 +02:00
parent ebcfc739bd
commit 86344dfe57
1 changed files with 27 additions and 6 deletions
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33
Nasal/canvas/api.nas
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@ -324,6 +324,7 @@ var Element = {
# Class for a group element on a canvas
#
var Group = {
# public:
new: func(node, id)
{
return { parents: [Group, Element.new(node, id)] };
@ -342,6 +343,17 @@ var Group = {
return factory([me._node, type], id);
},
# Get a vector of all child elements
getChildren: func()
{
var children = [];
foreach(var c; me._node.getChildren())
if( me._isElementNode(c) )
append(children, me._wrapElement(c));
return children;
},
# Get first child with given id (breadth-first search)
#
# @note Use with care as it can take several miliseconds (for me eg. ~2ms).
@ -361,15 +373,11 @@ var Group = {
{
var node_id = node.getNode("id");
if( node_id != nil and node_id.getValue() == id )
# Create element from existing node
return me._element_factories[ node.getName() ](node, nil);
return me._wrapElement(node);
}
foreach(var c; node.getChildren())
# element nodes have type NONE and valid element names (those in the the
# factor list)
if( c.getType() == "NONE"
and me._element_factories[ c.getName() ] != nil )
if( me._isElementNode(c) )
append(stack, c);
}
},
@ -379,6 +387,19 @@ var Group = {
foreach(var type; keys(me._element_factories))
me._node.removeChildren(type, 0);
return me;
},
# private:
_isElementNode: func(el)
{
# element nodes have type NONE and valid element names (those in the factory
# list)
return el.getType() == "NONE"
and me._element_factories[ el.getName() ] != nil;
},
_wrapElement: func(node)
{
# Create element from existing node
return me._element_factories[ node.getName() ](node, nil);
}
};