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YAHOO.ext.tree.DefaultSelectionModel = function(){
this.selNode = null;
this.events = {
'selectionchange' : true
};
};
YAHOO.extendX(YAHOO.ext.tree.DefaultSelectionModel, YAHOO.ext.util.Observable, {
init : function(tree){
this.tree = tree;
tree.el.mon('keydown', this.onKeyDown, this, true);
tree.on('click', this.onNodeClick, this, true);
},
onNodeClick : function(node, e){
this.select(node);
},
select : function(node){
if(this.selNode && this.selNode != node){
this.selNode.ui.onSelectedChange(false);
}
this.selNode = node;
node.ui.onSelectedChange(true);
this.fireEvent('selectionchange', this, node);
return node;
},
unselect : function(node){
if(this.selNode == node){
this.clearSelections();
}
},
clearSelections : function(){
var n = this.selNode;
if(n){
n.ui.onSelectedChange(false);
this.selNode = null;
this.fireEvent('selectionchange', this, null);
}
return n;
},
getSelectedNode : function(){
return this.selNode;
},
isSelected : function(node){
return this.selNode == node;
},
onKeyDown : function(e){
var s = this.selNode || this.lastSelNode;
// undesirable, but required
var sm = this;
if(!s){
return;
}
var k = e.getKey();
//alert(k)
switch(k){
case e.DOWN:
e.preventDefault();
if(s.firstChild && s.isExpanded()){
this.select(s.firstChild, e);
}else if(s.nextSibling){
this.select(s.nextSibling, e);
}else if(s.parentNode){
s.parentNode.bubble(function(){
if(this.nextSibling){
sm.select(this.nextSibling, e);
return false;
}
});
}
break;
case e.UP:
e.preventDefault();
var ps = s.previousSibling;
if(ps){
if(!ps.isExpanded()){
this.select(ps, e);
}else{
var lc = ps.lastChild;
while(lc && lc.isExpanded()){
lc = lc.lastChild;
}
this.select(lc, e);
}
}else if(s.parentNode && (this.tree.rootVisible || !s.parentNode.isRoot)){
this.select(s.parentNode, e);
}
break;
case e.RIGHT:
e.preventDefault();
if(s.hasChildNodes()){
if(!s.isExpanded()){
s.expand();
}else if(s.firstChild){
this.select(s.firstChild, e);
}
}
break;
case e.LEFT:
e.preventDefault();
if(s.hasChildNodes() && s.isExpanded()){
s.collapse();
}else if(s.parentNode && (this.tree.rootVisible || s.parentNode != this.tree.getRootNode())){
this.select(s.parentNode, e);
}
break;
};
}
});
YAHOO.ext.tree.MultiSelectionModel = function(){
this.selNodes = [];
this.selMap = {};
this.events = {
'selectionchange' : true
};
};
YAHOO.extendX(YAHOO.ext.tree.MultiSelectionModel, YAHOO.ext.util.Observable, {
init : function(tree){
this.tree = tree;
tree.el.mon('keydown', this.onKeyDown, this, true);
tree.on('click', this.onNodeClick, this, true);
},
onNodeClick : function(node, e){
this.select(node, e, e.ctrlKey);
},
select : function(node, e, keepExisting){
if(keepExisting !== true){
this.clearSelections(true);
}
this.selNodes.push(node);
this.selMap[node.id] = node;
this.lastSelNode = node;
node.ui.onSelectedChange(true);
this.fireEvent('selectionchange', this, this.selNodes);
return node;
},
unselect : function(node){
if(this.selMap[node.id]){
node.ui.onSelectedChange(false);
var sn = this.selNodes;
var index = -1;
if(sn.indexOf){
index = sn.indexOf(node);
}else{
for(var i = 0, len = sn.length; i < len; i++){
if(sn[i] == node){
index = i;
break;
}
}
}
if(index != -1){
this.selNodes.splice(index, 1);
}
delete this.selMap[node.id];
this.fireEvent('selectionchange', this, this.selNodes);
}
},
clearSelections : function(suppressEvent){
var sn = this.selNodes;
if(sn.length > 0){
for(var i = 0, len = sn.length; i < len; i++){
sn[i].ui.onSelectedChange(false);
}
this.selNodes = [];
this.selMap = {};
if(suppressEvent !== true){
this.fireEvent('selectionchange', this, this.selNodes);
}
}
},
isSelected : function(node){
return this.selMap[node.id] ? true : false;
},
getSelectedNodes : function(){
return this.selNodes;
},
onKeyDown : YAHOO.ext.tree.DefaultSelectionModel.prototype.onKeyDown
});
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