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/*
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Author: Mike Adair mike.adairATccrs.nrcan.gc.ca
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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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// Ensure this object's dependancies are loaded.
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mapbuilder.loadScript(baseDir+"/tool/ToolBase.js");
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/**
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* Tool which implements a click and drag behaviour to set the
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* Area Of Interest on the model from mouse events.
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* The tool must be enabled before use by calling tool.enable(true);
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* This tool registers mouse event listeners on the parent model.
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* This tool processes screen coordinates and stores AOI in the current map
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* projection coordinates.
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* @constructor
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* @base ToolBase
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* @param toolNode The node for this tool from the configuration document.
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* @param model The model object that contains this tool
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*/
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function AoiMouseHandler(toolNode, model) {
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ToolBase.apply(this, new Array(toolNode, model));
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/**
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* Process the mouseup action by stopping the drag.
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* @param objRef Pointer to this object.
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* @param targetNode The HTML node that the event occured on
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*/
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this.mouseUpHandler = function(objRef,targetNode) {
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if (objRef.enabled) {
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if (objRef.started) objRef.started = false;
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}
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}
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/**
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* Process the mousedown action by setting the anchor point.
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* @param objRef Pointer to this object.
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* @param targetNode The HTML node that the event occured on
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*/
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this.mouseDownHandler = function(objRef,targetNode) {
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if (objRef.enabled) {
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objRef.started = true;
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objRef.anchorPoint = targetNode.evpl;
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objRef.dragBox( targetNode.evpl );
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}
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}
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/**
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* Process a the mousemove action as dragging out a box.
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* @param objRef Pointer to this object.
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* @param targetNode The HTML node that the event occured on
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*/
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this.mouseMoveHandler = function(objRef,targetNode) {
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if (objRef.enabled) {
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if (objRef.started) objRef.dragBox(targetNode.evpl);
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}
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}
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/**
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* Process a the mouseout action when the mouse moves out of the mappane
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* @param objRef Pointer to this object.
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* @param targetNode The HTML node that the event occured on
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*/
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this.mouseOutHandler = function(objRef,targetNode) {
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if (objRef.enabled) {
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if (objRef.started) objRef.started = false;
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}
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}
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/**
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* Process a the mousemove action as dragging out a box.
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* @param objRef Pointer to this object.
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* @param targetNode The HTML node that the event occured on
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*/
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this.mouseOverHandler = function(objRef,targetNode) {
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if (objRef.enabled) {
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//if (objRef.started) objRef.dragBox(targetNode.evpl);
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}
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}
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/** Change the coordinate of one corner of the box. The anchor point stays fixed.
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* @param evpl new corner coordinate.
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*/
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this.dragBox = function( evpl ) {
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var ul = new Array();
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var lr = new Array();
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if (this.anchorPoint[0] > evpl[0]) {
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ul[0] = evpl[0];
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lr[0] = this.anchorPoint[0];
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} else {
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ul[0] = this.anchorPoint[0];
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lr[0] = evpl[0];
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}
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if (this.anchorPoint[1] > evpl[1]) {
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ul[1] = evpl[1];
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lr[1] = this.anchorPoint[1];
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} else {
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ul[1] = this.anchorPoint[1];
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lr[1] = evpl[1];
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}
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//set new AOI in context
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ul = this.model.extent.getXY( ul );
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lr = this.model.extent.getXY( lr );
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this.model.setParam("aoi", new Array(ul,lr) );
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}
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//register the listeners on the model
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this.model.addListener('mousedown',this.mouseDownHandler,this);
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this.model.addListener('mousemove',this.mouseMoveHandler,this);
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this.model.addListener('mouseup',this.mouseUpHandler,this);
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//this.model.addListener('mouseout',this.mouseOutHandler,this);
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//this.model.addListener('mouseover',this.mouseOutHandler,this);
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}
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