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source: trunk/workshop-routing-foss4g/web/GeoExt/docs/_sources/lib/GeoExt/widgets/tree/LayerLoader.txt @ 76

Revision 76, 2.8 KB checked in by djay, 10 years ago (diff)

Ajout du répertoire web

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1
2.. currentmodule:: GeoExt.tree
3
4:class:`GeoExt.tree.LayerLoader`
5================================================================================
6
7
8.. cssclass:: meta
9
10
11Extends
12    * `Ext.util.Observable <http://dev.sencha.com/deploy/dev/docs/?class=Ext.util.Observable>`_
13   
14
15
16
17
18
19
20.. class:: LayerLoader
21
22    A loader that will load all layers of a :class:`GeoExt.data.LayerStore`
23    By default, only layers that have displayInLayerSwitcher set to true
24    will be included. The childrens' iconCls defaults to
25    "gx-tree-layer-icon".
26
27
28   
29
30
31Config Options
32--------------
33
34Configuration properties in addition to
35those listed for `Ext.util.Observable <http://dev.sencha.com/deploy/dev/docs/?class=Ext.util.Observable>`_.
36
37
38.. describe:: baseAttrs
39
40    An object containing attributes to be added to all nodes created by
41    this loader.
42
43.. describe:: filter
44
45    ``Function``
46    A function, called in the scope of this loader, with a layer record
47    as argument. Is expected to return true for layers to be loaded, false
48    otherwise. By default, the filter checks for displayInLayerSwitcher:
49   
50    .. code-block:: javascript
51   
52        filter: function(record) {
53            return record.getLayer().displayInLayerSwitcher == true
54        }
55
56.. describe:: store
57
58    :class:`GeoExt.data.LayerStore`
59    The layer store containing layers to be added by this loader.
60
61.. describe:: uiProviders
62
63    ``Object``
64    An optional object containing properties which specify custom
65    GeoExt.tree.LayerNodeUI implementations. If the optional uiProvider
66    attribute for child nodes is a string rather than a reference to a
67    TreeNodeUI implementation, then that string value is used as a
68    property name in the uiProviders object. If not provided, the
69    uiProviders object will be taken from the ownerTree's loader.
70
71
72
73
74
75
76Public Methods
77--------------
78
79Public methods in addition to those
80listed for `Ext.util.Observable <http://dev.sencha.com/deploy/dev/docs/?class=Ext.util.Observable>`_.
81
82
83.. method:: LayerLoader.createNode
84
85    :param attr: ``Object`` attributes for the new node
86   
87    Override this function for custom TreeNode node implementation, or to
88    modify the attributes at creation time.
89
90
91
92
93Events
94------
95
96Events in addition to those
97listed for `Ext.util.Observable <http://dev.sencha.com/deploy/dev/docs/?class=Ext.util.Observable>`_.
98
99
100.. describe:: beforeload
101
102    Triggered before loading children. Return false to avoid
103    loading children.
104   
105    Listener arguments:
106   
107    * loader - :class:`GeoExt.tree.LayerLoader` this loader
108    * node - ``Ex.tree.TreeNode`` the node that this loader is
109        configured with
110
111.. describe:: load
112
113    Triggered after children wer loaded.
114   
115    Listener arguments:
116   
117    * loader - :class:`GeoExt.tree.LayerLoader` this loader
118    * node - ``Ex.tree.TreeNode`` the node that this loader is
119        configured with
120
121
122
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