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Struts example source code file (Tree.js)
This example Struts source code file (Tree.js) is included in the DevDaily.com
"Java Source Code
Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.
The Struts Tree.js source code
/*
Copyright (c) 2004-2006, The Dojo Foundation
All Rights Reserved.
Licensed under the Academic Free License version 2.1 or above OR the
modified BSD license. For more information on Dojo licensing, see:
http://dojotoolkit.org/community/licensing.shtml
*/
dojo.provide("dojo.widget.Tree");
dojo.require("dojo.widget.*");
dojo.require("dojo.event.*");
dojo.require("dojo.io.*");
dojo.require("dojo.widget.HtmlWidget");
dojo.require("dojo.widget.TreeNode");
dojo.require("dojo.html.common");
dojo.require("dojo.html.selection");
dojo.widget.defineWidget("dojo.widget.Tree", dojo.widget.HtmlWidget, function () {
this.eventNames = {};
this.tree = this;
this.DNDAcceptTypes = [];
this.actionsDisabled = [];
}, {widgetType:"Tree", eventNamesDefault:{createDOMNode:"createDOMNode", treeCreate:"treeCreate", treeDestroy:"treeDestroy", treeClick:"treeClick", iconClick:"iconClick", titleClick:"titleClick", moveFrom:"moveFrom", moveTo:"moveTo", addChild:"addChild", removeNode:"removeNode", expand:"expand", collapse:"collapse"}, isContainer:true, DNDMode:"off", lockLevel:0, strictFolders:true, DNDModes:{BETWEEN:1, ONTO:2}, DNDAcceptTypes:"", templateCssString:"\n.dojoTree {\n\tfont: caption;\n\tfont-size: 11px;\n\tfont-weight: normal;\n\toverflow: auto;\n}\n\n\n.dojoTreeNodeLabelTitle {\n\tpadding-left: 2px;\n\tcolor: WindowText;\n}\n\n.dojoTreeNodeLabel {\n\tcursor:hand;\n\tcursor:pointer;\n}\n\n.dojoTreeNodeLabelTitle:hover {\n\ttext-decoration: underline;\n}\n\n.dojoTreeNodeLabelSelected {\n\tbackground-color: Highlight;\n\tcolor: HighlightText;\n}\n\n.dojoTree div {\n\twhite-space: nowrap;\n}\n\n.dojoTree img, .dojoTreeNodeLabel img {\n\tvertical-align: middle;\n}\n\n", templateCssPath:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/Tree.css"), templateString:"<div class=\"dojoTree\"> ", isExpanded:true, isTree:true, objectId:"", controller:"", selector:"", menu:"", expandLevel:"", blankIconSrc:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_blank.gif"), gridIconSrcT:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_grid_t.gif"), gridIconSrcL:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_grid_l.gif"), gridIconSrcV:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_grid_v.gif"), gridIconSrcP:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_grid_p.gif"), gridIconSrcC:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_grid_c.gif"), gridIconSrcX:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_grid_x.gif"), gridIconSrcY:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_grid_y.gif"), gridIconSrcZ:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_grid_z.gif"), expandIconSrcPlus:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_expand_plus.gif"), expandIconSrcMinus:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_expand_minus.gif"), expandIconSrcLoading:dojo.uri.moduleUri("dojo.widget", "templates/images/Tree/treenode_loading.gif"), iconWidth:18, iconHeight:18, showGrid:true, showRootGrid:true, actionIsDisabled:function (action) {
var _this = this;
return dojo.lang.inArray(_this.actionsDisabled, action);
}, actions:{ADDCHILD:"ADDCHILD"}, getInfo:function () {
var info = {widgetId:this.widgetId, objectId:this.objectId};
return info;
}, initializeController:function () {
if (this.controller != "off") {
if (this.controller) {
this.controller = dojo.widget.byId(this.controller);
} else {
dojo.require("dojo.widget.TreeBasicController");
this.controller = dojo.widget.createWidget("TreeBasicController", {DNDController:(this.DNDMode ? "create" : ""), dieWithTree:true});
}
this.controller.listenTree(this);
} else {
this.controller = null;
}
}, initializeSelector:function () {
if (this.selector != "off") {
if (this.selector) {
this.selector = dojo.widget.byId(this.selector);
} else {
dojo.require("dojo.widget.TreeSelector");
this.selector = dojo.widget.createWidget("TreeSelector", {dieWithTree:true});
}
this.selector.listenTree(this);
} else {
this.selector = null;
}
}, initialize:function (args, frag) {
var _this = this;
for (name in this.eventNamesDefault) {
if (dojo.lang.isUndefined(this.eventNames[name])) {
this.eventNames[name] = this.widgetId + "/" + this.eventNamesDefault[name];
}
}
for (var i = 0; i < this.actionsDisabled.length; i++) {
this.actionsDisabled[i] = this.actionsDisabled[i].toUpperCase();
}
if (this.DNDMode == "off") {
this.DNDMode = 0;
} else {
if (this.DNDMode == "between") {
this.DNDMode = this.DNDModes.ONTO | this.DNDModes.BETWEEN;
} else {
if (this.DNDMode == "onto") {
this.DNDMode = this.DNDModes.ONTO;
}
}
}
this.expandLevel = parseInt(this.expandLevel);
this.initializeSelector();
this.initializeController();
if (this.menu) {
this.menu = dojo.widget.byId(this.menu);
this.menu.listenTree(this);
}
this.containerNode = this.domNode;
}, postCreate:function () {
this.createDOMNode();
}, createDOMNode:function () {
dojo.html.disableSelection(this.domNode);
for (var i = 0; i < this.children.length; i++) {
this.children[i].parent = this;
var node = this.children[i].createDOMNode(this, 0);
this.domNode.appendChild(node);
}
if (!this.showRootGrid) {
for (var i = 0; i < this.children.length; i++) {
this.children[i].expand();
}
}
dojo.event.topic.publish(this.eventNames.treeCreate, {source:this});
}, destroy:function () {
dojo.event.topic.publish(this.tree.eventNames.treeDestroy, {source:this});
return dojo.widget.HtmlWidget.prototype.destroy.apply(this, arguments);
}, addChild:function (child, index) {
var message = {child:child, index:index, parent:this, domNodeInitialized:child.domNodeInitialized};
this.doAddChild.apply(this, arguments);
dojo.event.topic.publish(this.tree.eventNames.addChild, message);
}, doAddChild:function (child, index) {
if (dojo.lang.isUndefined(index)) {
index = this.children.length;
}
if (!child.isTreeNode) {
dojo.raise("You can only add TreeNode widgets to a " + this.widgetType + " widget!");
return;
}
if (this.isTreeNode) {
if (!this.isFolder) {
this.setFolder();
}
}
var _this = this;
dojo.lang.forEach(child.getDescendants(), function (elem) {
elem.tree = _this.tree;
});
child.parent = this;
if (this.isTreeNode) {
this.state = this.loadStates.LOADED;
}
if (index < this.children.length) {
dojo.html.insertBefore(child.domNode, this.children[index].domNode);
} else {
this.containerNode.appendChild(child.domNode);
if (this.isExpanded && this.isTreeNode) {
this.showChildren();
}
}
this.children.splice(index, 0, child);
if (child.domNodeInitialized) {
var d = this.isTreeNode ? this.depth : -1;
child.adjustDepth(d - child.depth + 1);
child.updateIconTree();
} else {
child.depth = this.isTreeNode ? this.depth + 1 : 0;
child.createDOMNode(child.tree, child.depth);
}
var prevSibling = child.getPreviousSibling();
if (child.isLastChild() && prevSibling) {
prevSibling.updateExpandGridColumn();
}
}, makeBlankImg:function () {
var img = document.createElement("img");
img.style.width = this.iconWidth + "px";
img.style.height = this.iconHeight + "px";
img.src = this.blankIconSrc;
img.style.verticalAlign = "middle";
return img;
}, updateIconTree:function () {
if (!this.isTree) {
this.updateIcons();
}
for (var i = 0; i < this.children.length; i++) {
this.children[i].updateIconTree();
}
}, toString:function () {
return "[" + this.widgetType + " ID:" + this.widgetId + "]";
}, move:function (child, newParent, index) {
var oldParent = child.parent;
var oldTree = child.tree;
this.doMove.apply(this, arguments);
var newParent = child.parent;
var newTree = child.tree;
var message = {oldParent:oldParent, oldTree:oldTree, newParent:newParent, newTree:newTree, child:child};
dojo.event.topic.publish(oldTree.eventNames.moveFrom, message);
dojo.event.topic.publish(newTree.eventNames.moveTo, message);
}, doMove:function (child, newParent, index) {
child.parent.doRemoveNode(child);
newParent.doAddChild(child, index);
}, removeNode:function (child) {
if (!child.parent) {
return;
}
var oldTree = child.tree;
var oldParent = child.parent;
var removedChild = this.doRemoveNode.apply(this, arguments);
dojo.event.topic.publish(this.tree.eventNames.removeNode, {child:removedChild, tree:oldTree, parent:oldParent});
return removedChild;
}, doRemoveNode:function (child) {
if (!child.parent) {
return;
}
var parent = child.parent;
var children = parent.children;
var index = child.getParentIndex();
if (index < 0) {
dojo.raise("Couldn't find node " + child + " for removal");
}
children.splice(index, 1);
dojo.html.removeNode(child.domNode);
if (parent.children.length == 0 && !parent.isTree) {
parent.containerNode.style.display = "none";
}
if (index == children.length && index > 0) {
children[index - 1].updateExpandGridColumn();
}
if (parent instanceof dojo.widget.Tree && index == 0 && children.length > 0) {
children[0].updateExpandGrid();
}
child.parent = child.tree = null;
return child;
}, markLoading:function () {
}, unMarkLoading:function () {
}, lock:function () {
!this.lockLevel && this.markLoading();
this.lockLevel++;
}, unlock:function () {
if (!this.lockLevel) {
dojo.raise("unlock: not locked");
}
this.lockLevel--;
!this.lockLevel && this.unMarkLoading();
}, isLocked:function () {
var node = this;
while (true) {
if (node.lockLevel) {
return true;
}
if (node instanceof dojo.widget.Tree) {
break;
}
node = node.parent;
}
return false;
}, flushLock:function () {
this.lockLevel = 0;
this.unMarkLoading();
}});
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