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<!DOCTYPE html><html lang="en" style="font-size:16px"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><link rel="icon" href="../favicon.ico"><title>Source: Mouse.js</title><!--[if lt IE 9]>
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aria-label="change-font-size"><svg><use xlink:href="#font-size-icon"></use></svg></button></div></div><nav></nav></nav></div><div class="toc-container"><div class="toc-content"><span class="bold">On this page</span><div id="eed4d2a0bfd64539bb9df78095dec881"></div></div></div><div class="body-wrapper"><div class="main-content"><div class="main-wrapper"><section id="source-page" class="source-page"><header><h1 id="title" class="has-anchor">Mouse.js</h1></header><article><pre class="prettyprint source lang-js"><code>class Mouse {
/**
* Create and start mouse obj, args: a model, and a callback method.
*
* @param {Canvas|String} canvas The canvas upon which we track the mouse.
* If a string is given, get the HTML element by that name
* @param {world} world World instance
* @param {Function} callback callback(mouse) called on every mouse action
*/
// constructor(canvas, world, callback = (evt, mouse) => {}) {
constructor(model, view, callback) {
Object.assign(this, { model, view, callback })
this.canvas = view.canvas
this.world = model.world
// callMouseHandler: arrow fnc to insure "this" is mouse.
this.callMouseHandler = e => this.mouseHandler(e)
this.isRunning = this.mouseDown = false
this.x = this.y = this.action = null
this.setContinuous(false)
}
setContinuous(continuous = true) {
this.continuous = continuous
return this
}
/**
* Start the mouseListeners.
* @returns this Return this instance for chaining
*/
start() {
// Note: multiple calls safe
this.canvas.addEventListener('mousedown', this.callMouseHandler)
if (this.continuous) this.startMouse()
this.isRunning = true
return this // chaining
}
/**
* Start the mouseListeners.
* @returns this Return this instance for chaining
*/
stop() {
// Note: multiple calls safe
this.canvas.removeEventListener('mousedown', this.callMouseHandler)
this.stopMouse()
this.isRunning = false
return this // chaining
}
startMouse() {
document.body.addEventListener('mouseup', this.callMouseHandler)
this.canvas.addEventListener('mousemove', this.callMouseHandler)
}
stopMouse() {
document.body.removeEventListener('mouseup', this.callMouseHandler)
this.canvas.removeEventListener('mousemove', this.callMouseHandler)
}
mouseHandler(e) {
if (e.type === 'mousedown') {
if (!this.continuous) this.startMouse()
this.mouseDown = true
}
if (e.type === 'mouseup') {
if (!this.continuous) this.stopMouse()
this.mouseDown = false
}
this.action = e.type
if (e.type === 'mousemove' && this.mouseDown) {
this.action = 'mousedrag'
}
this.setXY(e)
this.callback(this)
}
// set x, y to be event location in turtle coordinates, floats.
setXY(e) {
const { canvas, world } = this
const patchSize = world.patchSize(canvas)
const rect = this.canvas.getBoundingClientRect()
const pixX = e.clientX - rect.left
const pixY = e.clientY - rect.top
const [x, y] = world.pixelXYtoPatchXY(pixX, pixY, patchSize)
Object.assign(this, { x, y })
}
}
export default Mouse
</code></pre></article></section><footer class="footer" id="PeOAagUepe"><div class="wrapper">AgentScript version: 0.10.20 using clean-jsdoc-theme</div></footer></div></div></div><div class="search-container" id="PkfLWpAbet" style="display:none"><div class="wrapper" id="iCxFxjkHbP"><button class="icon-button search-close-button" id="VjLlGakifb" aria-label="close search"><svg><use xlink:href="#close-icon"></use></svg></button><div class="search-box-c"><svg><use xlink:href="#search-icon"></use></svg> <input type="text" id="vpcKVYIppa" class="search-input" placeholder="Search..." autofocus></div><div class="search-result-c" id="fWwVHRuDuN"><span class="search-result-c-text">Type anything to view search result</span></div></div></div><div class="mobile-menu-icon-container"><button class="icon-button" id="mobile-menu" data-isopen="false" aria-label="menu"><svg><use xlink:href="#menu-icon"></use></svg></button></div><div id="mobile-sidebar" class="mobile-sidebar-container"><div class="mobile-sidebar-wrapper"><a href="/" class="sidebar-title sidebar-title-anchor">Home</a><div class="mobile-nav-links"><div class="navbar-item"><a id="github-mobile" href="https://github.com/backspaces/agentscript" target="">Github</a></div><div class="navbar-item"><a id="AgentScript-mobile" href="https://code.agentscript.org" target="">AgentScript.org</a></div><div class="navbar-item"><a id="npm-mobile" href="https://www.npmjs.com/package/agentscript" target="">npm</a></div><div class="navbar-item"><a id="unpkg-mobile" href="https://unpkg.com/browse/agentscript/" target="">unpkg</a></div></div><div class="mobile-sidebar-items-c"><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-classes"><div>Classes</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="AgentArray.html">AgentArray</a></div><div class="sidebar-section-children"><a href="AgentList.html">AgentList</a></div><div class="sidebar-section-children"><a href="AgentSet.html">AgentSet</a></div><div class="sidebar-section-children"><a href="Animator.html">Animator</a></div><div class="sidebar-section-children"><a href="DataSet.html">DataSet</a></div><div class="sidebar-section-children"><a href="GUI.html">GUI</a></div><div class="sidebar-section-children"><a href="GeoDataSet.html">GeoDataSet</a></div><div class="sidebar-section-children"><a href="Keyboard.html">Keyboard</a></div><div class="sidebar-section-children"><a href="Link.html">Link</a></div><div class="sidebar-section-children"><a href="Links.html">Links</a></div><div class="sidebar-section-children"><a href="Model.html">Model</a></div><div class="sidebar-section-children"><a href="Model3D.html">Model3D</a></div><div class="sidebar-section-children"><a href="Mouse.html">Mouse</a></div><div class="sidebar-section-children"><a href="Patch.html">Patch</a></div><div class="sidebar-section-children"><a href="Patches.html">Patches</a></div><div class="sidebar-section-children"><a href="RGBDataSet.html">RGBDataSet</a></div><div class="sidebar-section-children"><a href="ThreeDraw.html">ThreeDraw</a></div><div class="sidebar-section-children"><a href="Turtle.html">Turtle</a></div><div class="sidebar-section-children"><a href="Turtle3D.html">Turtle3D</a></div><div class="sidebar-section-children"><a href="Turtles.html">Turtles</a></div><div class="sidebar-section-children"><a href="TwoDraw.html">TwoDraw</a></div><div class="sidebar-section-children"><a href="World.html">World</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-modules"><div>Modules</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="module-src_geojson.html">src/geojson</a></div><div class="sidebar-section-children"><a href="module-src_gis.html">src/gis</a></div><div class="sidebar-section-children"><a href="module-src_utils.html">src/utils</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-tutorials"><div>Tutorials</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="tutorial-1 - 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