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define("dijit/form/_ListBase", [
"dojo/_base/declare", // declare
"dojo/window" // winUtils.scrollIntoView
], function(declare, winUtils){
// module:
// dijit/form/_ListBase
// summary:
// Focus-less menu to handle UI events consistently
return declare( "dijit.form._ListBase", null, {
// summary:
// Focus-less menu to handle UI events consistently
// Abstract methods that must be defined externally:
// onSelect: item is active (mousedown but not yet mouseup, or keyboard arrow selected but no Enter)
// onDeselect: cancels onSelect
// tags:
// private
// selected: DOMnode
// currently selected node
selected: null,
_getTarget: function(/*Event*/ evt){
var tgt = evt.target;
var container = this.containerNode;
if(tgt == container || tgt == this.domNode){ return null; }
while(tgt && tgt.parentNode != container){
// recurse to the top
tgt = tgt.parentNode;
}
return tgt;
},
selectFirstNode: function(){
// summary:
// Select the first displayed item in the list.
var first = this.containerNode.firstChild;
while(first && first.style.display == "none"){
first = first.nextSibling;
}
this._setSelectedAttr(first);
},
selectLastNode: function(){
// summary:
// Select the last displayed item in the list
var last = this.containerNode.lastChild;
while(last && last.style.display == "none"){
last = last.previousSibling;
}
this._setSelectedAttr(last);
},
selectNextNode: function(){
// summary:
// Select the item just below the current selection.
// If nothing selected, select first node.
var selectedNode = this._getSelectedAttr();
if(!selectedNode){
this.selectFirstNode();
}else{
var next = selectedNode.nextSibling;
while(next && next.style.display == "none"){
next = next.nextSibling;
}
if(!next){
this.selectFirstNode();
}else{
this._setSelectedAttr(next);
}
}
},
selectPreviousNode: function(){
// summary:
// Select the item just above the current selection.
// If nothing selected, select last node (if
// you select Previous and try to keep scrolling up the list).
var selectedNode = this._getSelectedAttr();
if(!selectedNode){
this.selectLastNode();
}else{
var prev = selectedNode.previousSibling;
while(prev && prev.style.display == "none"){
prev = prev.previousSibling;
}
if(!prev){
this.selectLastNode();
}else{
this._setSelectedAttr(prev);
}
}
},
_setSelectedAttr: function(/*DomNode*/ node){
// summary:
// Does the actual select.
if(this.selected != node){
var selectedNode = this._getSelectedAttr();
if(selectedNode){
this.onDeselect(selectedNode);
this.selected = null;
}
if(node && node.parentNode == this.containerNode){
this.selected = node;
winUtils.scrollIntoView(node);
this.onSelect(node);
}
}else if(node){
this.onSelect(node);
}
},
_getSelectedAttr: function(){
// summary:
// Returns the selected node.
var v = this.selected;
return (v && v.parentNode == this.containerNode) ? v : (this.selected = null);
}
});
});
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