X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/ee06f37b0f6f6d94cd05a6ffae556660f7c4a2bc..c930e9176a5a85509c5b0230e2bff5c22a591432:/examples/tree/ARIA.js

diff --git a/examples/tree/ARIA.js b/examples/tree/ARIA.js
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+++ b/examples/tree/ARIA.js
@@ -0,0 +1,110 @@
+/*!
+ * Ext JS Library 3.0.0
+ * Copyright(c) 2006-2009 Ext JS, LLC
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+(function() {
+
+Ext.a11y.ARIA = Ext.apply(new Ext.util.Observable(), function() {
+    return {
+        setRole : function(el, role) {
+            el = Ext.getDom(el);
+            if(el) {
+                el.setAttribute('role', role.toString());
+            }
+        },
+        
+        setProperty : function(el, key, value) {
+            el = Ext.getDom(el);
+            if(el) {
+                el.setAttribute(key.toString(), value.toString());
+            }                
+        }
+    }
+}());
+
+var ARIA = Ext.a11y.ARIA;
+
+Ext.override(Ext.tree.TreeNode, {
+    render : function(bulkRender){
+        this.ui.render(bulkRender);
+        if(!this.rendered){
+            // make sure it is registered
+            this.getOwnerTree().registerNode(this);
+            this.rendered = true;
+            this.fireEvent('noderender', this);
+            if(this.expanded){
+                this.expanded = false;
+                this.expand(false, false);
+            }
+        }
+    }
+});
+
+Ext.override(Ext.tree.TreePanel, {
+    initARIA : function() {
+        Ext.tree.TreePanel.superclass.initARIA.call(this);
+        this.getSelectionModel().on('selectionchange', this.onNodeSelect, this);
+        this.ariaTreeEl = this.body.down('.x-tree-root-ct');
+        this.on('collapsenode', this.onNodeCollapse, this);
+        this.on('expandnode', this.onNodeExpand, this);
+    },
+    
+    // private
+    registerNode : function(node){
+        if(this.nodeHash[node.id] === undefined) {
+            node.on('noderender', this.onNodeRender, this);
+        }
+        this.nodeHash[node.id] = node;
+    },
+
+    // private
+    unregisterNode : function(node){
+        node.un('noderender', this.onNodeRender, this);
+        delete this.nodeHash[node.id];
+    },
+    
+    onNodeRender : function(node) {
+        var a = node.ui.anchor,
+            level = this.rootVisible ? 1 : 0,
+            pnode = node;
+                                
+        if(node.isRoot) {
+            ARIA.setRole(this.ariaTreeEl, 'tree');
+            ARIA.setProperty(this.ariaTreeEl, 'aria-labelledby', Ext.id(node.ui.textNode));
+            ARIA.setProperty(this.ariaTreeEl, 'aria-activedescendant', 'false');
+            if(!this.rootVisible) {
+                return;
+            }
+        }
+        ARIA.setRole(node.ui.wrap, 'treeitem');
+        ARIA.setProperty(node.ui.wrap, 'aria-labelledby', Ext.id(node.ui.textNode));            
+        ARIA.setProperty(node.ui.wrap, 'aria-expanded', 'false');
+        ARIA.setProperty(node.ui.wrap, 'aria-selected', 'false');
+        while (pnode.parentNode) {
+            level++;
+            pnode = pnode.parentNode;
+        }
+        ARIA.setProperty(node.ui.wrap, 'aria-level', level);   
+        if(!node.isLeaf()) {
+            ARIA.setRole(node.ui.ctNode, 'group');
+            ARIA.setProperty(node.ui.wrap, 'aria-expanded', node.isExpanded());
+        }
+    },
+    
+    onNodeSelect : function(sm, node) {
+        ARIA.setProperty(this.ariaTreeEl, 'aria-activedescendant', Ext.id(node.ui.wrap));
+        ARIA.setProperty(node.ui.wrap, 'aria-selected', 'true');
+    },
+    
+    onNodeCollapse : function(node) {
+        ARIA.setProperty(node.ui.wrap, 'aria-expanded', 'false');
+    },
+    
+    onNodeExpand : function(node) {
+        ARIA.setProperty(node.ui.wrap, 'aria-expanded', 'true');
+    }
+});
+     
+})();
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