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/*
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id$
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*/
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/**
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* Base Tool object that all Tools extend.
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* @constructor
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* @author Mike Adair mike.adairATccrs.nrcan.gc.ca
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* @param toolNode The tool node from the Config XML file.
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* @param model The widget object which created this tool.
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*/
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function ToolBase(toolNode, model) {
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this.model = model;
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this.toolNode = toolNode;
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//set the ID for this tool
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var id = toolNode.selectSingleNode("@id");
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if (id) {
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this.id = id.firstChild.nodeValue;
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} else {
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this.id = "MbTool_" + mbIds.getId();
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}
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/**
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* Initialize the targetModel property to point to the object. This happens
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* as an init listener to ensure that the referenced model has been created.
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* @param toolRef Pointer to this object.
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*/
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this.initTargetModel = function(toolRef) {
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/** The model this tool will update. */
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var targetModel = toolRef.toolNode.selectSingleNode("mb:targetModel");
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if (targetModel) {
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var targetModelName = targetModel.firstChild.nodeValue;
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toolRef.targetModel = eval("config.objects."+targetModelName);
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if (!toolRef.targetModel) alert("error finding targetModel:"+targetModelName+" for tool:"+toolRef.id);
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} else {
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toolRef.targetModel = toolRef.model;
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}
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}
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this.model.addListener( "init", this.initTargetModel, this );
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/**
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* Initialize the mouseHandler property to point to the object. This happens
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* as an init listener to ensure that the referenced model has been created.
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* @param toolRef Pointer to this object.
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*/
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this.initMouseHandler = function(toolRef) {
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/** Mouse handler which this tool will register listeners with. */
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var mouseHandler = toolRef.toolNode.selectSingleNode("mb:mouseHandler");
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if (mouseHandler) {
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toolRef.mouseHandler = eval("config.objects." + mouseHandler.firstChild.nodeValue);
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if (!toolRef.mouseHandler) {
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alert("error finding mouseHandler:"+mouseHandler.firstChild.nodeValue+" for tool:"+toolRef.id);
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}
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}
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}
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this.model.addListener( "init", this.initMouseHandler, this );
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//tools enabled by default; can set to false in config for initial loading
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this.enabled = true;
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var enabled = toolNode.selectSingleNode("mb:enabled");
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if (enabled) this.enabled = eval(enabled.firstChild.nodeValue);
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}
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