/*
Copyright (c) 2006, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 0.12.0
*/
/**
* The treeview widget is a generic tree building tool.
* @module treeview
* @title TreeView Widget
* @requires yahoo
* @optional animation
* @namespace YAHOO.widget
*/
/**
* Contains the tree view state data and the root node.
*
* @class TreeView
* @constructor
* @param {string|HTMLElement} id The id of the element, or the element
* itself that the tree will be inserted into.
*/
YAHOO.widget.TreeView = function(id) {
if (id) { this.init(id); }
};
YAHOO.widget.TreeView.prototype = {
/**
* The id of tree container element
* @property id
* @type String
*/
id: null,
/**
* The host element for this tree
* @property _el
* @private
*/
_el: null,
/**
* Flat collection of all nodes in this tree
* @property _nodes
* @type Node[]
* @private
*/
_nodes: null,
/**
* We lock the tree control while waiting for the dynamic loader to return
* @property locked
* @type boolean
*/
locked: false,
/**
* The animation to use for expanding children, if any
* @property _expandAnim
* @type string
* @private
*/
_expandAnim: null,
/**
* The animation to use for collapsing children, if any
* @property _collapseAnim
* @type string
* @private
*/
_collapseAnim: null,
/**
* The current number of animations that are executing
* @property _animCount
* @type int
* @private
*/
_animCount: 0,
/**
* The maximum number of animations to run at one time.
* @property maxAnim
* @type int
*/
maxAnim: 2,
/**
* Sets up the animation for expanding children
* @method setExpandAnim
* @param {string} type the type of animation (acceptable values defined
* in YAHOO.widget.TVAnim)
*/
setExpandAnim: function(type) {
if (YAHOO.widget.TVAnim.isValid(type)) {
this._expandAnim = type;
}
},
/**
* Sets up the animation for collapsing children
* @method setCollapseAnim
* @param {string} the type of animation (acceptable values defined in
* YAHOO.widget.TVAnim)
*/
setCollapseAnim: function(type) {
if (YAHOO.widget.TVAnim.isValid(type)) {
this._collapseAnim = type;
}
},
/**
* Perform the expand animation if configured, or just show the
* element if not configured or too many animations are in progress
* @method animateExpand
* @param el {HTMLElement} the element to animate
* @param node {YAHOO.util.Node} the node that was expanded
* @return {boolean} true if animation could be invoked, false otherwise
*/
animateExpand: function(el, node) {
if (this._expandAnim && this._animCount < this.maxAnim) {
// this.locked = true;
var tree = this;
var a = YAHOO.widget.TVAnim.getAnim(this._expandAnim, el,
function() { tree.expandComplete(node); });
if (a) {
++this._animCount;
this.fireEvent("animStart", {
"node": node,
"type": "expand"
});
a.animate();
}
return true;
}
return false;
},
/**
* Perform the collapse animation if configured, or just show the
* element if not configured or too many animations are in progress
* @method animateCollapse
* @param el {HTMLElement} the element to animate
* @param node {YAHOO.util.Node} the node that was expanded
* @return {boolean} true if animation could be invoked, false otherwise
*/
animateCollapse: function(el, node) {
if (this._collapseAnim && this._animCount < this.maxAnim) {
// this.locked = true;
var tree = this;
var a = YAHOO.widget.TVAnim.getAnim(this._collapseAnim, el,
function() { tree.collapseComplete(node); });
if (a) {
++this._animCount;
this.fireEvent("animStart", {
"node": node,
"type": "collapse"
});
a.animate();
}
return true;
}
return false;
},
/**
* Function executed when the expand animation completes
* @method expandComplete
*/
expandComplete: function(node) {
--this._animCount;
this.fireEvent("animComplete", {
"node": node,
"type": "expand"
});
// this.locked = false;
},
/**
* Function executed when the collapse animation completes
* @method collapseComplete
*/
collapseComplete: function(node) {
--this._animCount;
this.fireEvent("animComplete", {
"node": node,
"type": "collapse"
});
// this.locked = false;
},
/**
* Initializes the tree
* @method init
* @parm {string|HTMLElement} id the id of the element that will hold the tree
* @private
*/
init: function(id) {
this.id = id;
if ("string" !== typeof id) {
this._el = id;
this.id = this.generateId(id);
}
/**
* When animation is enabled, this event fires when the animation
* starts
* @event animStart
* @type CustomEvent
* @param {YAHOO.widget.Node} node the node that is expanding/collapsing
* @parm {String} type the type of animation ("expand" or "collapse")
*/
this.createEvent("animStart", this);
/**
* When animation is enabled, this event fires when the animation
* completes
* @event animComplete
* @type CustomEvent
* @param {YAHOO.widget.Node} node the node that is expanding/collapsing
* @parm {String} type the type of animation ("expand" or "collapse")
*/
this.createEvent("animComplete", this);
/**
* Fires when a node is going to be expanded. Return false to stop
* the expand.
* @event collapse
* @type CustomEvent
* @param {YAHOO.widget.Node} node the node that is expanding/collapsing
*/
this.createEvent("collapse", this);
/**
* Fires when a node is going to be collapsed. Return false to stop
* the collapse.
* @event expand
* @type CustomEvent
* @param {YAHOO.widget.Node} node the node that is expanding/collapsing
*/
this.createEvent("expand", this);
this._nodes = [];
// store a global reference
YAHOO.widget.TreeView.trees[this.id] = this;
// Set up the root node
this.root = new YAHOO.widget.RootNode(this);
},
/**
* Renders the tree boilerplate and visible nodes
* @method draw
*/
draw: function() {
var html = this.root.getHtml();
this.getEl().innerHTML = html;
this.firstDraw = false;
},
/**
* Returns the tree's host element
* @method getEl
* @return {HTMLElement} the host element
*/
getEl: function() {
if (! this._el) {
this._el = document.getElementById(this.id);
}
return this._el;
},
/**
* Nodes register themselves with the tree instance when they are created.
* @method regNode
* @param node {Node} the node to register
* @private
*/
regNode: function(node) {
this._nodes[node.index] = node;
},
/**
* Returns the root node of this tree
* @method getRoot
* @return {Node} the root node
*/
getRoot: function() {
return this.root;
},
/**
* Configures this tree to dynamically load all child data
* @method setDynamicLoad
* @param {function} fnDataLoader the function that will be called to get the data
* @param iconMode {int} configures the icon that is displayed when a dynamic
* load node is expanded the first time without children. By default, the
* "collapse" icon will be used. If set to 1, the leaf node icon will be
* displayed.
*/
setDynamicLoad: function(fnDataLoader, iconMode) {
this.root.setDynamicLoad(fnDataLoader, iconMode);
},
/**
* Expands all child nodes. Note: this conflicts with the "multiExpand"
* node property. If expand all is called in a tree with nodes that
* do not allow multiple siblings to be displayed, only the last sibling
* will be expanded.
* @method expandAll
*/
expandAll: function() {
if (!this.locked) {
this.root.expandAll();
}
},
/**
* Collapses all expanded child nodes in the entire tree.
* @method collapseAll
*/
collapseAll: function() {
if (!this.locked) {
this.root.collapseAll();
}
},
/**
* Returns a node in the tree that has the specified index (this index
* is created internally, so this function probably will only be used
* in html generated for a given node.)
* @method getNodeByIndex
* @param {int} nodeIndex the index of the node wanted
* @return {Node} the node with index=nodeIndex, null if no match
*/
getNodeByIndex: function(nodeIndex) {
var n = this._nodes[nodeIndex];
return (n) ? n : null;
},
/**
* Returns a node that has a matching property and value in the data
* object that was passed into its constructor.
* @method getNodeByProperty
* @param {object} property the property to search (usually a string)
* @param {object} value the value we want to find (usuall an int or string)
* @return {Node} the matching node, null if no match
*/
getNodeByProperty: function(property, value) {
for (var i in this._nodes) {
var n = this._nodes[i];
if (n.data && value == n.data[property]) {
return n;
}
}
return null;
},
/**
* Returns a collection of nodes that have a matching property
* and value in the data object that was passed into its constructor.
* @method getNodesByProperty
* @param {object} property the property to search (usually a string)
* @param {object} value the value we want to find (usuall an int or string)
* @return {Array} the matching collection of nodes, null if no match
*/
getNodesByProperty: function(property, value) {
var values = [];
for (var i in this._nodes) {
var n = this._nodes[i];
if (n.data && value == n.data[property]) {
values.push(n);
}
}
return (values.length) ? values : null;
},
/**
* Removes the node and its children, and optionally refreshes the
* branch of the tree that was affected.
* @method removeNode
* @param {Node} The node to remove
* @param {boolean} autoRefresh automatically refreshes branch if true
* @return {boolean} False is there was a problem, true otherwise.
*/
removeNode: function(node, autoRefresh) {
// Don't delete the root node
if (node.isRoot()) {
return false;
}
// Get the branch that we may need to refresh
var p = node.parent;
if (p.parent) {
p = p.parent;
}
// Delete the node and its children
this._deleteNode(node);
// Refresh the parent of the parent
if (autoRefresh && p && p.childrenRendered) {
p.refresh();
}
return true;
},
/**
* Deletes this nodes child collection, recursively. Also collapses
* the node, and resets the dynamic load flag. The primary use for
* this method is to purge a node and allow it to fetch its data
* dynamically again.
* @method removeChildren
* @param {Node} node the node to purge
*/
removeChildren: function(node) {
while (node.children.length) {
this._deleteNode(node.children[0]);
}
node.childrenRendered = false;
node.dynamicLoadComplete = false;
if (node.expanded) {
node.collapse();
} else {
node.updateIcon();
}
},
/**
* Deletes the node and recurses children
* @method _deleteNode
* @private
*/
_deleteNode: function(node) {
// Remove all the child nodes first
this.removeChildren(node);
// Remove the node from the tree
this.popNode(node);
},
/**
* Removes the node from the tree, preserving the child collection
* to make it possible to insert the branch into another part of the
* tree, or another tree.
* @method popNode
* @param {Node} the node to remove
*/
popNode: function(node) {
var p = node.parent;
// Update the parent's collection of children
var a = [];
for (var i=0, len=p.children.length;i<len;++i) {
if (p.children[i] != node) {
a[a.length] = p.children[i];
}
}
p.children = a;
// reset the childrenRendered flag for the parent
p.childrenRendered = false;
// Update the sibling relationship
if (node.previousSibling) {
node.previousSibling.nextSibling = node.nextSibling;
}
if (node.nextSibling) {
node.nextSibling.previousSibling = node.previousSibling;
}
node.parent = null;
node.previousSibling = null;
node.nextSibling = null;
node.tree = null;
// Update the tree's node collection
delete this._nodes[node.index];
},
/**
* TreeView instance toString
* @method toString
* @return {string} string representation of the tree
*/
toString: function() {
return "TreeView " + this.id;
},
/**
* Generates an unique id for an element if it doesn't yet have one
* @method generateId
* @private
*/
generateId: function(el) {
var id = el.id;
if (!id) {
id = "yui-tv-auto-id-" + YAHOO.widget.TreeView.counter;
++YAHOO.widget.TreeView.counter;
}
return id;
},
/**
* Abstract method that is executed when a node is expanded
* @method onExpand
* @param node {Node} the node that was expanded
* @deprecated use treeobj.subscribe("expand") instead
*/
onExpand: function(node) { },
/**
* Abstract method that is executed when a node is collapsed.
* @method onCollapse
* @param node {Node} the node that was collapsed.
* @deprecated use treeobj.subscribe("collapse") instead
*/
onCollapse: function(node) { }
};
YAHOO.augment(YAHOO.widget.TreeView, YAHOO.util.EventProvider);
/**
* Count of all nodes in all trees
* @property YAHOO.widget.TreeView.nodeCount
* @type int
* @static
*/
YAHOO.widget.TreeView.nodeCount = 0;
/**
* Global cache of tree instances
* @property YAHOO.widget.TreeView.trees
* @type Array
* @static
* @private
*/
YAHOO.widget.TreeView.trees = [];
/**
* Counter for generating a new unique element id
* @property YAHOO.widget.TreeView.counter
* @static
* @private
*/
YAHOO.widget.TreeView.counter = 0;
/**
* Global method for getting a tree by its id. Used in the generated
* tree html.
* @method YAHOO.widget.TreeView.getTree
* @param treeId {String} the id of the tree instance
* @return {TreeView} the tree instance requested, null if not found.
* @static
*/
YAHOO.widget.TreeView.getTree = function(treeId) {
var t = YAHOO.widget.TreeView.trees[treeId];
return (t) ? t : null;
};
/**
* Global method for getting a node by its id. Used in the generated
* tree html.
* @method YAHOO.widget.TreeView.getNode
* @param treeId {String} the id of the tree instance
* @param nodeIndex {String} the index of the node to return
* @return {Node} the node instance requested, null if not found
* @static
*/
YAHOO.widget.TreeView.getNode = function(treeId, nodeIndex) {
var t = YAHOO.widget.TreeView.getTree(treeId);
return (t) ? t.getNodeByIndex(nodeIndex) : null;
};
/**
* Add a DOM event
* @method YAHOO.widget.TreeView.addHandler
* @param el the elment to bind the handler to
* @param {string} sType the type of event handler
* @param {function} fn the callback to invoke
* @static
*/
YAHOO.widget.TreeView.addHandler = function (el, sType, fn) {
if (el.addEventListener) {
el.addEventListener(sType, fn, false);
} else if (el.attachEvent) {
el.attachEvent("on" + sType, fn);
}
};
/**
* Remove a DOM event
* @method YAHOO.widget.TreeView.removeHandler
* @param el the elment to bind the handler to
* @param {string} sType the type of event handler
* @param {function} fn the callback to invoke
* @static
*/
YAHOO.widget.TreeView.removeHandler = function (el, sType, fn) {
if (el.removeEventListener) {
el.removeEventListener(sType, fn, false);
} else if (el.detachEvent) {
el.detachEvent("on" + sType, fn);
}
};
/**
* Attempts to preload the images defined in the styles used to draw the tree by
* rendering off-screen elements that use the styles.
* @method YAHOO.widget.TreeView.preload
* @param {string} prefix the prefix to use to generate the names of the
* images to preload, default is ygtv
* @static
*/
YAHOO.widget.TreeView.preload = function(prefix) {
prefix = prefix || "ygtv";
var styles = ["tn","tm","tmh","tp","tph","ln","lm","lmh","lp","lph","loading"];
var sb = [];
for (var i = 0; i < styles.length; ++i) {
sb[sb.length] = '<span class="' + prefix + styles[i] + '"> </span>';
}
var f = document.createElement("div");
var s = f.style;
s.position = "absolute";
s.top = "-1000px";
s.left = "-1000px";
f.innerHTML = sb.join("");
document.body.appendChild(f);
YAHOO.widget.TreeView.removeHandler(window,
"load", YAHOO.widget.TreeView.preload);
};
YAHOO.widget.TreeView.addHandler(window,
"load", YAHOO.widget.TreeView.preload);
/**
* The base class for all tree nodes. The node's presentation and behavior in
* response to mouse events is handled in Node subclasses.
* @namespace YAHOO.widget
* @class Node
* @param oData {object} a string or object containing the data that will
* be used to render this node
* @param oParent {Node} this node's parent node
* @param expanded {boolean} the initial expanded/collapsed state
* @constructor
*/
YAHOO.widget.Node = function(oData, oParent, expanded) {
if (oData) { this.init(oData, oParent, expanded); }
};
YAHOO.widget.Node.prototype = {
/**
* The index for this instance obtained from global counter in YAHOO.widget.TreeView.
* @property index
* @type int
*/
index: 0,
/**
* This node's child node collection.
* @property children
* @type Node[]
*/
children: null,
/**
* Tree instance this node is part of
* @property tree
* @type TreeView
*/
tree: null,
/**
* The data linked to this node. This can be any object or primitive
* value, and the data can be used in getNodeHtml().
* @property data
* @type object
*/
data: null,
/**
* Parent node
* @property parent
* @type Node
*/
parent: null,
/**
* The depth of this node. We start at -1 for the root node.
* @property depth
* @type int
*/
depth: -1,
/**
* The href for the node's label. If one is not specified, the href will
* be set so that it toggles the node.
* @property href
* @type string
*/
href: null,
/**
* The label href target, defaults to current window
* @property target
* @type string
*/
target: "_self",
/**
* The node's expanded/collapsed state
* @property expanded
* @type boolean
*/
expanded: false,
/**
* Can multiple children be expanded at once?
* @property multiExpand
* @type boolean
*/
multiExpand: true,
/**
* Should we render children for a collapsed node? It is possible that the
* implementer will want to render the hidden data... @todo verify that we
* need this, and implement it if we do.
* @property renderHidden
* @type boolean
*/
renderHidden: false,
/**
* This flag is set to true when the html is generated for this node's
* children, and set to false when new children are added.
* @property childrenRendered
* @type boolean
*/
childrenRendered: false,
/**
* Dynamically loaded nodes only fetch the data the first time they are
* expanded. This flag is set to true once the data has been fetched.
* @property dynamicLoadComplete
* @type boolean
*/
dynamicLoadComplete: false,
/**
* This node's previous sibling
* @property previousSibling
* @type Node
*/
previousSibling: null,
/**
* This node's next sibling
* @property nextSibling
* @type Node
*/
nextSibling: null,
/**
* We can set the node up to call an external method to get the child
* data dynamically.
* @property _dynLoad
* @type boolean
* @private
*/
_dynLoad: false,
/**
* Function to execute when we need to get this node's child data.
* @property dataLoader
* @type function
*/
dataLoader: null,
/**
* This is true for dynamically loading nodes while waiting for the
* callback to return.
* @property isLoading
* @type boolean
*/
isLoading: false,
/**
* The toggle/branch icon will not show if this is set to false. This
* could be useful if the implementer wants to have the child contain
* extra info about the parent, rather than an actual node.
* @property hasIcon
* @type boolean
*/
hasIcon: true,
/**
* Used to configure what happens when a dynamic load node is expanded
* and we discover that it does not have children. By default, it is
* treated as if it still could have children (plus/minus icon). Set
* iconMode to have it display like a leaf node instead.
* @property iconMode
* @type int
*/
iconMode: 0,
/**
* The node type
* @property _type
* @private
*/
_type: "Node",
/*
spacerPath: "http://us.i1.yimg.com/us.yimg.com/i/space.gif",
expandedText: "Expanded",
collapsedText: "Collapsed",
loadingText: "Loading",
*/
/**
* Initializes this node, gets some of the properties from the parent
* @method init
* @param oData {object} a string or object containing the data that will
* be used to render this node
* @param oParent {Node} this node's parent node
* @param expanded {boolean} the initial expanded/collapsed state
*/
init: function(oData, oParent, expanded) {
this.data = oData;
this.children = [];
this.index = YAHOO.widget.TreeView.nodeCount;
++YAHOO.widget.TreeView.nodeCount;
this.expanded = expanded;
/**
* The parentChange event is fired when a parent element is applied
* to the node. This is useful if you need to apply tree-level
* properties to a tree that need to happen if a node is moved from
* one tre to another.
*
* @event parentChange
* @type CustomEvent
*/
this.createEvent("parentChange", this);
// oParent should never be null except when we create the root node.
if (oParent) {
oParent.appendChild(this);
}
},
/**
* Certain properties for the node cannot be set until the parent
* is known. This is called after the node is inserted into a tree.
* the parent is also applied to this node's children in order to
* make it possible to move a branch from one tree to another.
* @method applyParent
* @param {Node} parentNode this node's parent node
* @return {boolean} true if the application was successful
*/
applyParent: function(parentNode) {
if (!parentNode) {
return false;
}
this.tree = parentNode.tree;
this.parent = parentNode;
this.depth = parentNode.depth + 1;
if (!this.href) {
this.href = "javascript:" + this.getToggleLink();
}
if (! this.multiExpand) {
this.multiExpand = parentNode.multiExpand;
}
this.tree.regNode(this);
parentNode.childrenRendered = false;
// cascade update existing children
for (var i=0, len=this.children.length;i<len;++i) {
this.children[i].applyParent(this);
}
this.fireEvent("parentChange");
return true;
},
/**
* Appends a node to the child collection.
* @method appendChild
* @param childNode {Node} the new node
* @return {Node} the child node
* @private
*/
appendChild: function(childNode) {
if (this.hasChildren()) {
var sib = this.children[this.children.length - 1];
sib.nextSibling = childNode;
childNode.previousSibling = sib;
}
this.children[this.children.length] = childNode;
childNode.applyParent(this);
return childNode;
},
/**
* Appends this node to the supplied node's child collection
* @method appendTo
* @param parentNode {Node} the node to append to.
* @return {Node} The appended node
*/
appendTo: function(parentNode) {
return parentNode.appendChild(this);
},
/**
* Inserts this node before this supplied node
* @method insertBefore
* @param node {Node} the node to insert this node before
* @return {Node} the inserted node
*/
insertBefore: function(node) {
var p = node.parent;
if (p) {
if (this.tree) {
this.tree.popNode(this);
}
var refIndex = node.isChildOf(p);
p.children.splice(refIndex, 0, this);
if (node.previousSibling) {
node.previousSibling.nextSibling = this;
}
this.previousSibling = node.previousSibling;
this.nextSibling = node;
node.previousSibling = this;
this.applyParent(p);
}
return this;
},
/**
* Inserts this node after the supplied node
* @method insertAfter
* @param node {Node} the node to insert after
* @return {Node} the inserted node
*/
insertAfter: function(node) {
var p = node.parent;
if (p) {
if (this.tree) {
this.tree.popNode(this);
}
var refIndex = node.isChildOf(p);
if (!node.nextSibling) {
return this.appendTo(p);
}
p.children.splice(refIndex + 1, 0, this);
node.nextSibling.previousSibling = this;
this.previousSibling = node;
this.nextSibling = node.nextSibling;
node.nextSibling = this;
this.applyParent(p);
}
return this;
},
/**
* Returns true if the Node is a child of supplied Node
* @method isChildOf
* @param parentNode {Node} the Node to check
* @return {boolean} The node index if this Node is a child of
* supplied Node, else -1.
* @private
*/
isChildOf: function(parentNode) {
if (parentNode && parentNode.children) {
for (var i=0, len=parentNode.children.length; i<len ; ++i) {
if (parentNode.children[i] === this) {
return i;
}
}
}
return -1;
},
/**
* Returns a node array of this node's siblings, null if none.
* @method getSiblings
* @return Node[]
*/
getSiblings: function() {
return this.parent.children;
},
/**
* Shows this node's children
* @method showChildren
*/
showChildren: function() {
if (!this.tree.animateExpand(this.getChildrenEl(), this)) {
if (this.hasChildren()) {
this.getChildrenEl().style.display = "";
}
}
},
/**
* Hides this node's children
* @method hideChildren
*/
hideChildren: function() {
if (!this.tree.animateCollapse(this.getChildrenEl(), this)) {
this.getChildrenEl().style.display = "none";
}
},
/**
* Returns the id for this node's container div
* @method getElId
* @return {string} the element id
*/
getElId: function() {
return "ygtv" + this.index;
},
/**
* Returns the id for this node's children div
* @method getChildrenElId
* @return {string} the element id for this node's children div
*/
getChildrenElId: function() {
return "ygtvc" + this.index;
},
/**
* Returns the id for this node's toggle element
* @method getToggleElId
* @return {string} the toggel element id
*/
getToggleElId: function() {
return "ygtvt" + this.index;
},
/*
* Returns the id for this node's spacer image. The spacer is positioned
* over the toggle and provides feedback for screen readers.
* @method getSpacerId
* @return {string} the id for the spacer image
*/
/*
getSpacerId: function() {
return "ygtvspacer" + this.index;
},
*/
/**
* Returns this node's container html element
* @method getEl
* @return {HTMLElement} the container html element
*/
getEl: function() {
return document.getElementById(this.getElId());
},
/**
* Returns the div that was generated for this node's children
* @method getChildrenEl
* @return {HTMLElement} this node's children div
*/
getChildrenEl: function() {
return document.getElementById(this.getChildrenElId());
},
/**
* Returns the element that is being used for this node's toggle.
* @method getToggleEl
* @return {HTMLElement} this node's toggle html element
*/
getToggleEl: function() {
return document.getElementById(this.getToggleElId());
},
/*
* Returns the element that is being used for this node's spacer.
* @method getSpacer
* @return {HTMLElement} this node's spacer html element
*/
/*
getSpacer: function() {
return document.getElementById( this.getSpacerId() ) || {};
},
*/
/*
getStateText: function() {
if (this.isLoading) {
return this.loadingText;
} else if (this.hasChildren(true)) {
if (this.expanded) {
return this.expandedText;
} else {
return this.collapsedText;
}
} else {
return "";
}
},
*/
/**
* Generates the link that will invoke this node's toggle method
* @method getToggleLink
* @return {string} the javascript url for toggling this node
*/
getToggleLink: function() {
return "YAHOO.widget.TreeView.getNode(\'" + this.tree.id + "\'," +
this.index + ").toggle()";
},
/**
* Hides this nodes children (creating them if necessary), changes the
* @method collapse
* toggle style.
*/
collapse: function() {
// Only collapse if currently expanded
if (!this.expanded) { return; }
// fire the collapse event handler
var ret = this.tree.onCollapse(this);
if (false === ret) {
return;
}
ret = this.tree.fireEvent("collapse", this);
if (false === ret) {
return;
}
if (!this.getEl()) {
this.expanded = false;
return;
}
// hide the child div
this.hideChildren();
this.expanded = false;
this.updateIcon();
// this.getSpacer().title = this.getStateText();
},
/**
* Shows this nodes children (creating them if necessary), changes the
* toggle style, and collapses its siblings if multiExpand is not set.
* @method expand
*/
expand: function() {
// Only expand if currently collapsed.
if (this.expanded) { return; }
// fire the expand event handler
var ret = this.tree.onExpand(this);
if (false === ret) {
return;
}
ret = this.tree.fireEvent("expand", this);
if (false === ret) {
return;
}
if (!this.getEl()) {
this.expanded = true;
return;
}
if (! this.childrenRendered) {
this.getChildrenEl().innerHTML = this.renderChildren();
} else {
}
this.expanded = true;
this.updateIcon();
// this.getSpacer().title = this.getStateText();
// We do an extra check for children here because the lazy
// load feature can expose nodes that have no children.
// if (!this.hasChildren()) {
if (this.isLoading) {
this.expanded = false;
return;
}
if (! this.multiExpand) {
var sibs = this.getSiblings();
for (var i=0; i<sibs.length; ++i) {
if (sibs[i] != this && sibs[i].expanded) {
sibs[i].collapse();
}
}
}
this.showChildren();
},
updateIcon: function() {
if (this.hasIcon) {
var el = this.getToggleEl();
if (el) {
el.className = this.getStyle();
}
}
},
/**
* Returns the css style name for the toggle
* @method getStyle
* @return {string} the css class for this node's toggle
*/
getStyle: function() {
if (this.isLoading) {
return "ygtvloading";
} else {
// location top or bottom, middle nodes also get the top style
var loc = (this.nextSibling) ? "t" : "l";
// type p=plus(expand), m=minus(collapase), n=none(no children)
var type = "n";
if (this.hasChildren(true) || (this.isDynamic() && !this.getIconMode())) {
// if (this.hasChildren(true)) {
type = (this.expanded) ? "m" : "p";
}
return "ygtv" + loc + type;
}
},
/**
* Returns the hover style for the icon
* @return {string} the css class hover state
* @method getHoverStyle
*/
getHoverStyle: function() {
var s = this.getStyle();
if (this.hasChildren(true) && !this.isLoading) {
s += "h";
}
return s;
},
/**
* Recursively expands all of this node's children.
* @method expandAll
*/
expandAll: function() {
for (var i=0;i<this.children.length;++i) {
var c = this.children[i];
if (c.isDynamic()) {
alert("Not supported (lazy load + expand all)");
break;
} else if (! c.multiExpand) {
alert("Not supported (no multi-expand + expand all)");
break;
} else {
c.expand();
c.expandAll();
}
}
},
/**
* Recursively collapses all of this node's children.
* @method collapseAll
*/
collapseAll: function() {
for (var i=0;i<this.children.length;++i) {
this.children[i].collapse();
this.children[i].collapseAll();
}
},
/**
* Configures this node for dynamically obtaining the child data
* when the node is first expanded. Calling it without the callback
* will turn off dynamic load for the node.
* @method setDynamicLoad
* @param fmDataLoader {function} the function that will be used to get the data.
* @param iconMode {int} configures the icon that is displayed when a dynamic
* load node is expanded the first time without children. By default, the
* "collapse" icon will be used. If set to 1, the leaf node icon will be
* displayed.
*/
setDynamicLoad: function(fnDataLoader, iconMode) {
if (fnDataLoader) {
this.dataLoader = fnDataLoader;
this._dynLoad = true;
} else {
this.dataLoader = null;
this._dynLoad = false;
}
if (iconMode) {
this.iconMode = iconMode;
}
},
/**
* Evaluates if this node is the root node of the tree
* @method isRoot
* @return {boolean} true if this is the root node
*/
isRoot: function() {
return (this == this.tree.root);
},
/**
* Evaluates if this node's children should be loaded dynamically. Looks for
* the property both in this instance and the root node. If the tree is
* defined to load all children dynamically, the data callback function is
* defined in the root node
* @method isDynamic
* @return {boolean} true if this node's children are to be loaded dynamically
*/
isDynamic: function() {
var lazy = (!this.isRoot() && (this._dynLoad || this.tree.root._dynLoad));
return lazy;
},
/**
* Returns the current icon mode. This refers to the way childless dynamic
* load nodes appear.
* @method getIconMode
* @return {int} 0 for collapse style, 1 for leaf node style
*/
getIconMode: function() {
return (this.iconMode || this.tree.root.iconMode);
},
/**
* Checks if this node has children. If this node is lazy-loading and the
* children have not been rendered, we do not know whether or not there
* are actual children. In most cases, we need to assume that there are
* children (for instance, the toggle needs to show the expandable
* presentation state). In other times we want to know if there are rendered
* children. For the latter, "checkForLazyLoad" should be false.
* @method hasChildren
* @param checkForLazyLoad {boolean} should we check for unloaded children?
* @return {boolean} true if this has children or if it might and we are
* checking for this condition.
*/
hasChildren: function(checkForLazyLoad) {
return ( this.children.length > 0 ||
(checkForLazyLoad && this.isDynamic() && !this.dynamicLoadComplete) );
},
/**
* Expands if node is collapsed, collapses otherwise.
* @method toggle
*/
toggle: function() {
if (!this.tree.locked && ( this.hasChildren(true) || this.isDynamic()) ) {
if (this.expanded) { this.collapse(); } else { this.expand(); }
}
},
/**
* Returns the markup for this node and its children.
* @method getHtml
* @return {string} the markup for this node and its expanded children.
*/
getHtml: function() {
this.childrenRendered = false;
var sb = [];
sb[sb.length] = '<div class="ygtvitem" id="' + this.getElId() + '">';
sb[sb.length] = this.getNodeHtml();
sb[sb.length] = this.getChildrenHtml();
sb[sb.length] = '</div>';
return sb.join("");
},
/**
* Called when first rendering the tree. We always build the div that will
* contain this nodes children, but we don't render the children themselves
* unless this node is expanded.
* @method getChildrenHtml
* @return {string} the children container div html and any expanded children
* @private
*/
getChildrenHtml: function() {
var sb = [];
sb[sb.length] = '<div class="ygtvchildren"';
sb[sb.length] = ' id="' + this.getChildrenElId() + '"';
if (!this.expanded) {
sb[sb.length] = ' style="display:none;"';
}
sb[sb.length] = '>';
// Don't render the actual child node HTML unless this node is expanded.
if ( (this.hasChildren(true) && this.expanded) ||
(this.renderHidden && !this.isDynamic()) ) {
sb[sb.length] = this.renderChildren();
}
sb[sb.length] = '</div>';
return sb.join("");
},
/**
* Generates the markup for the child nodes. This is not done until the node
* is expanded.
* @method renderChildren
* @return {string} the html for this node's children
* @private
*/
renderChildren: function() {
var node = this;
if (this.isDynamic() && !this.dynamicLoadComplete) {
this.isLoading = true;
this.tree.locked = true;
if (this.dataLoader) {
setTimeout(
function() {
node.dataLoader(node,
function() {
node.loadComplete();
});
}, 10);
} else if (this.tree.root.dataLoader) {
setTimeout(
function() {
node.tree.root.dataLoader(node,
function() {
node.loadComplete();
});
}, 10);
} else {
return "Error: data loader not found or not specified.";
}
return "";
} else {
return this.completeRender();
}
},
/**
* Called when we know we have all the child data.
* @method completeRender
* @return {string} children html
*/
completeRender: function() {
var sb = [];
for (var i=0; i < this.children.length; ++i) {
// this.children[i].childrenRendered = false;
sb[sb.length] = this.children[i].getHtml();
}
this.childrenRendered = true;
return sb.join("");
},
/**
* Load complete is the callback function we pass to the data provider
* in dynamic load situations.
* @method loadComplete
*/
loadComplete: function() {
this.getChildrenEl().innerHTML = this.completeRender();
this.dynamicLoadComplete = true;
this.isLoading = false;
this.expand();
this.tree.locked = false;
},
/**
* Returns this node's ancestor at the specified depth.
* @method getAncestor
* @param {int} depth the depth of the ancestor.
* @return {Node} the ancestor
*/
getAncestor: function(depth) {
if (depth >= this.depth || depth < 0) {
return null;
}
var p = this.parent;
while (p.depth > depth) {
p = p.parent;
}
return p;
},
/**
* Returns the css class for the spacer at the specified depth for
* this node. If this node's ancestor at the specified depth
* has a next sibling the presentation is different than if it
* does not have a next sibling
* @method getDepthStyle
* @param {int} depth the depth of the ancestor.
* @return {string} the css class for the spacer
*/
getDepthStyle: function(depth) {
return (this.getAncestor(depth).nextSibling) ?
"ygtvdepthcell" : "ygtvblankdepthcell";
},
/**
* Get the markup for the node. This is designed to be overrided so that we can
* support different types of nodes.
* @method getNodeHtml
* @return {string} The HTML that will render this node.
*/
getNodeHtml: function() {
return "";
},
/**
* Regenerates the html for this node and its children. To be used when the
* node is expanded and new children have been added.
* @method refresh
*/
refresh: function() {
// this.loadComplete();
this.getChildrenEl().innerHTML = this.completeRender();
if (this.hasIcon) {
var el = this.getToggleEl();
if (el) {
el.className = this.getStyle();
}
}
},
/**
* Node toString
* @method toString
* @return {string} string representation of the node
*/
toString: function() {
return "Node (" + this.index + ")";
}
};
YAHOO.augment(YAHOO.widget.Node, YAHOO.util.EventProvider);
/**
* A custom YAHOO.widget.Node that handles the unique nature of
* the virtual, presentationless root node.
* @namespace YAHOO.widget
* @class RootNode
* @extends YAHOO.widget.Node
* @param oTree {YAHOO.widget.TreeView} The tree instance this node belongs to
* @constructor
*/
YAHOO.widget.RootNode = function(oTree) {
// Initialize the node with null params. The root node is a
// special case where the node has no presentation. So we have
// to alter the standard properties a bit.
this.init(null, null, true);
/*
* For the root node, we get the tree reference from as a param
* to the constructor instead of from the parent element.
*/
this.tree = oTree;
};
YAHOO.extend(YAHOO.widget.RootNode, YAHOO.widget.Node, {
// overrides YAHOO.widget.Node
getNodeHtml: function() {
return "";
},
toString: function() {
return "RootNode";
},
loadComplete: function() {
this.tree.draw();
}
});
/**
* The default node presentation. The first parameter should be
* either a string that will be used as the node's label, or an object
* that has a string propery called label. By default, the clicking the
* label will toggle the expanded/collapsed state of the node. By
* changing the href property of the instance, this behavior can be
* changed so that the label will go to the specified href.
* @namespace YAHOO.widget
* @class TextNode
* @extends YAHOO.widget.Node
* @constructor
* @param oData {object} a string or object containing the data that will
* be used to render this node
* @param oParent {YAHOO.widget.Node} this node's parent node
* @param expanded {boolean} the initial expanded/collapsed state
*/
YAHOO.widget.TextNode = function(oData, oParent, expanded) {
if (oData) {
this.init(oData, oParent, expanded);
this.setUpLabel(oData);
}
};
YAHOO.extend(YAHOO.widget.TextNode, YAHOO.widget.Node, {
/**
* The CSS class for the label href. Defaults to ygtvlabel, but can be
* overridden to provide a custom presentation for a specific node.
* @property labelStyle
* @type string
*/
labelStyle: "ygtvlabel",
/**
* The derived element id of the label for this node
* @property labelElId
* @type string
*/
labelElId: null,
/**
* The text for the label. It is assumed that the oData parameter will
* either be a string that will be used as the label, or an object that
* has a property called "label" that we will use.
* @property label
* @type string
*/
label: null,
textNodeParentChange: function() {
/**
* Custom event that is fired when the text node label is clicked. The
* custom event is defined on the tree instance, so there is a single
* event that handles all nodes in the tree. The node clicked is
* provided as an argument
*
* @event labelClick
* @for YAHOO.widget.TreeView
* @param {YAHOO.widget.Node} node the node clicked
*/
if (this.tree && !this.tree.hasEvent("labelClick")) {
this.tree.createEvent("labelClick", this.tree);
}
},
/**
* Sets up the node label
* @method setUpLabel
* @param oData string containing the label, or an object with a label property
*/
setUpLabel: function(oData) {
// set up the custom event on the tree
this.textNodeParentChange();
this.subscribe("parentChange", this.textNodeParentChange);
if (typeof oData == "string") {
oData = { label: oData };
}
this.label = oData.label;
// update the link
if (oData.href) {
this.href = oData.href;
}
// set the target
if (oData.target) {
this.target = oData.target;
}
if (oData.style) {
this.labelStyle = oData.style;
}
this.labelElId = "ygtvlabelel" + this.index;
},
/**
* Returns the label element
* @for YAHOO.widget.TextNode
* @method getLabelEl
* @return {object} the element
*/
getLabelEl: function() {
return document.getElementById(this.labelElId);
},
// overrides YAHOO.widget.Node
getNodeHtml: function() {
var sb = [];
sb[sb.length] = '<table border="0" cellpadding="0" cellspacing="0">';
sb[sb.length] = '<tr>';
for (var i=0;i<this.depth;++i) {
// sb[sb.length] = '<td class="ygtvdepthcell"> </td>';
sb[sb.length] = '<td class="' + this.getDepthStyle(i) + '"> </td>';
}
var getNode = 'YAHOO.widget.TreeView.getNode(\'' +
this.tree.id + '\',' + this.index + ')';
sb[sb.length] = '<td';
// sb[sb.length] = ' onselectstart="return false"';
sb[sb.length] = ' id="' + this.getToggleElId() + '"';
sb[sb.length] = ' class="' + this.getStyle() + '"';
if (this.hasChildren(true)) {
sb[sb.length] = ' onmouseover="this.className=';
sb[sb.length] = getNode + '.getHoverStyle()"';
sb[sb.length] = ' onmouseout="this.className=';
sb[sb.length] = getNode + '.getStyle()"';
}
sb[sb.length] = ' onclick="javascript:' + this.getToggleLink() + '">';
/*
sb[sb.length] = '<img id="' + this.getSpacerId() + '"';
sb[sb.length] = ' alt=""';
sb[sb.length] = ' tabindex=0';
sb[sb.length] = ' src="' + this.spacerPath + '"';
sb[sb.length] = ' title="' + this.getStateText() + '"';
sb[sb.length] = ' class="ygtvspacer"';
// sb[sb.length] = ' onkeypress="return ' + getNode + '".onKeyPress()"';
sb[sb.length] = ' />';
*/
sb[sb.length] = ' ';
sb[sb.length] = '</td>';
sb[sb.length] = '<td>';
sb[sb.length] = '<a';
sb[sb.length] = ' id="' + this.labelElId + '"';
sb[sb.length] = ' class="' + this.labelStyle + '"';
sb[sb.length] = ' href="' + this.href + '"';
sb[sb.length] = ' target="' + this.target + '"';
sb[sb.length] = ' onclick="return ' + getNode + '.onLabelClick(' + getNode +')"';
if (this.hasChildren(true)) {
sb[sb.length] = ' onmouseover="document.getElementById(\'';
sb[sb.length] = this.getToggleElId() + '\').className=';
sb[sb.length] = getNode + '.getHoverStyle()"';
sb[sb.length] = ' onmouseout="document.getElementById(\'';
sb[sb.length] = this.getToggleElId() + '\').className=';
sb[sb.length] = getNode + '.getStyle()"';
}
sb[sb.length] = ' >';
sb[sb.length] = this.label;
sb[sb.length] = '</a>';
sb[sb.length] = '</td>';
sb[sb.length] = '</tr>';
sb[sb.length] = '</table>';
return sb.join("");
},
/**
* Executed when the label is clicked. Fires the labelClick custom event.
* @method onLabelClick
* @param me {Node} this node
* @scope the anchor tag clicked
* @return false to cancel the anchor click
*/
onLabelClick: function(me) {
return me.tree.fireEvent("labelClick", me);
//return true;
},
toString: function() {
return "TextNode (" + this.index + ") " + this.label;
}
});
/**
* A menu-specific implementation that differs from TextNode in that only
* one sibling can be expanded at a time.
* @namespace YAHOO.widget
* @class MenuNode
* @extends YAHOO.widget.TextNode
* @param oData {object} a string or object containing the data that will
* be used to render this node
* @param oParent {YAHOO.widget.Node} this node's parent node
* @param expanded {boolean} the initial expanded/collapsed state
* @constructor
*/
YAHOO.widget.MenuNode = function(oData, oParent, expanded) {
if (oData) {
this.init(oData, oParent, expanded);
this.setUpLabel(oData);
}
/*
* Menus usually allow only one branch to be open at a time.
*/
this.multiExpand = false;
};
YAHOO.extend(YAHOO.widget.MenuNode, YAHOO.widget.TextNode, {
toString: function() {
return "MenuNode (" + this.index + ") " + this.label;
}
});
/**
* This implementation takes either a string or object for the
* oData argument. If is it a string, we will use it for the display
* of this node (and it can contain any html code). If the parameter
* is an object, we look for a parameter called "html" that will be
* used for this node's display.
* @namespace YAHOO.widget
* @class HTMLNode
* @extends YAHOO.widget.Node
* @constructor
* @param oData {object} a string or object containing the data that will
* be used to render this node
* @param oParent {YAHOO.widget.Node} this node's parent node
* @param expanded {boolean} the initial expanded/collapsed state
* @param hasIcon {boolean} specifies whether or not leaf nodes should
* have an icon
*/
YAHOO.widget.HTMLNode = function(oData, oParent, expanded, hasIcon) {
if (oData) {
this.init(oData, oParent, expanded);
this.initContent(oData, hasIcon);
}
};
YAHOO.extend(YAHOO.widget.HTMLNode, YAHOO.widget.Node, {
/**
* The CSS class for the html content container. Defaults to ygtvhtml, but
* can be overridden to provide a custom presentation for a specific node.
* @property contentStyle
* @type string
*/
contentStyle: "ygtvhtml",
/**
* The generated id that will contain the data passed in by the implementer.
* @property contentElId
* @type string
*/
contentElId: null,
/**
* The HTML content to use for this node's display
* @property content
* @type string
*/
content: null,
/**
* Sets up the node label
* @property initContent
* @param {object} An html string or object containing an html property
* @param {boolean} hasIcon determines if the node will be rendered with an
* icon or not
*/
initContent: function(oData, hasIcon) {
if (typeof oData == "string") {
oData = { html: oData };
}
this.html = oData.html;
this.contentElId = "ygtvcontentel" + this.index;
this.hasIcon = hasIcon;
},
/**
* Returns the outer html element for this node's content
* @method getContentEl
* @return {HTMLElement} the element
*/
getContentEl: function() {
return document.getElementById(this.contentElId);
},
// overrides YAHOO.widget.Node
getNodeHtml: function() {
var sb = [];
sb[sb.length] = '<table border="0" cellpadding="0" cellspacing="0">';
sb[sb.length] = '<tr>';
for (var i=0;i<this.depth;++i) {
sb[sb.length] = '<td class="' + this.getDepthStyle(i) + '"> </td>';
}
if (this.hasIcon) {
sb[sb.length] = '<td';
sb[sb.length] = ' id="' + this.getToggleElId() + '"';
sb[sb.length] = ' class="' + this.getStyle() + '"';
sb[sb.length] = ' onclick="javascript:' + this.getToggleLink() + '"';
if (this.hasChildren(true)) {
sb[sb.length] = ' onmouseover="this.className=';
sb[sb.length] = 'YAHOO.widget.TreeView.getNode(\'';
sb[sb.length] = this.tree.id + '\',' + this.index + ').getHoverStyle()"';
sb[sb.length] = ' onmouseout="this.className=';
sb[sb.length] = 'YAHOO.widget.TreeView.getNode(\'';
sb[sb.length] = this.tree.id + '\',' + this.index + ').getStyle()"';
}
sb[sb.length] = '> </td>';
}
sb[sb.length] = '<td';
sb[sb.length] = ' id="' + this.contentElId + '"';
sb[sb.length] = ' class="' + this.contentStyle + '"';
sb[sb.length] = ' >';
sb[sb.length] = this.html;
sb[sb.length] = '</td>';
sb[sb.length] = '</tr>';
sb[sb.length] = '</table>';
return sb.join("");
},
toString: function() {
return "HTMLNode (" + this.index + ")";
}
});
/**
* A static factory class for tree view expand/collapse animations
* @class TVAnim
* @static
*/
YAHOO.widget.TVAnim = function() {
return {
/**
* Constant for the fade in animation
* @property FADE_IN
* @type string
* @static
*/
FADE_IN: "TVFadeIn",
/**
* Constant for the fade out animation
* @property FADE_OUT
* @type string
* @static
*/
FADE_OUT: "TVFadeOut",
/**
* Returns a ygAnim instance of the given type
* @method getAnim
* @param type {string} the type of animation
* @param el {HTMLElement} the element to element (probably the children div)
* @param callback {function} function to invoke when the animation is done.
* @return {YAHOO.util.Animation} the animation instance
* @static
*/
getAnim: function(type, el, callback) {
if (YAHOO.widget[type]) {
return new YAHOO.widget[type](el, callback);
} else {
return null;
}
},
/**
* Returns true if the specified animation class is available
* @method isValid
* @param type {string} the type of animation
* @return {boolean} true if valid, false if not
* @static
*/
isValid: function(type) {
return (YAHOO.widget[type]);
}
};
} ();
/**
* A 1/2 second fade-in animation.
* @class TVFadeIn
* @constructor
* @param el {HTMLElement} the element to animate
* @param callback {function} function to invoke when the animation is finished
*/
YAHOO.widget.TVFadeIn = function(el, callback) {
/**
* The element to animate
* @property el
* @type HTMLElement
*/
this.el = el;
/**
* the callback to invoke when the animation is complete
* @property callback
* @type function
*/
this.callback = callback;
};
YAHOO.widget.TVFadeIn.prototype = {
/**
* Performs the animation
* @method animate
*/
animate: function() {
var tvanim = this;
var s = this.el.style;
s.opacity = 0.1;
s.filter = "alpha(opacity=10)";
s.display = "";
var dur = 0.4;
var a = new YAHOO.util.Anim(this.el, {opacity: {from: 0.1, to: 1, unit:""}}, dur);
a.onComplete.subscribe( function() { tvanim.onComplete(); } );
a.animate();
},
/**
* Clean up and invoke callback
* @method onComplete
*/
onComplete: function() {
this.callback();
},
/**
* toString
* @method toString
* @return {string} the string representation of the instance
*/
toString: function() {
return "TVFadeIn";
}
};
/**
* A 1/2 second fade out animation.
* @class TVFadeOut
* @constructor
* @param el {HTMLElement} the element to animate
* @param callback {Function} function to invoke when the animation is finished
*/
YAHOO.widget.TVFadeOut = function(el, callback) {
/**
* The element to animate
* @property el
* @type HTMLElement
*/
this.el = el;
/**
* the callback to invoke when the animation is complete
* @property callback
* @type function
*/
this.callback = callback;
};
YAHOO.widget.TVFadeOut.prototype = {
/**
* Performs the animation
* @method animate
*/
animate: function() {
var tvanim = this;
var dur = 0.4;
var a = new YAHOO.util.Anim(this.el, {opacity: {from: 1, to: 0.1, unit:""}}, dur);
a.onComplete.subscribe( function() { tvanim.onComplete(); } );
a.animate();
},
/**
* Clean up and invoke callback
* @method onComplete
*/
onComplete: function() {
var s = this.el.style;
s.display = "none";
// s.opacity = 1;
s.filter = "alpha(opacity=100)";
this.callback();
},
/**
* toString
* @method toString
* @return {string} the string representation of the instance
*/
toString: function() {
return "TVFadeOut";
}
};