From a871abff90e825b309ac8fcf9094831199b1c6db Mon Sep 17 00:00:00 2001
From: Chris Malley <cmalley@pixelzoom.com>
Date: Wed, 23 Dec 2015 12:09:25 -0700
Subject: [PATCH] move LaserPointerNode to scenery-phet,
 phetsims/models-of-the-hydrogen-atom#2

---
 js/LaserPointerNode.js | 121 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 js/LaserPointerNode.js

diff --git a/js/LaserPointerNode.js b/js/LaserPointerNode.js
new file mode 100644
index 000000000..839e1cccd
--- /dev/null
+++ b/js/LaserPointerNode.js
@@ -0,0 +1,121 @@
+// Copyright 2015, University of Colorado Boulder
+
+/**
+ * A laser pointer, with on/off button.
+ * Default orientation is pointing to the right. Origin is at right center.
+ *
+ * @author Chris Malley (PixelZoom, Inc.)
+ */
+define( function( require ) {
+  'use strict';
+
+  // modules
+  var Dimension2 = require( 'DOT/Dimension2' );
+  var inherit = require( 'PHET_CORE/inherit' );
+  var LinearGradient = require( 'SCENERY/util/LinearGradient' );
+  var modelsOfTheHydrogenAtom = require( 'MODELS_OF_THE_HYDROGEN_ATOM/modelsOfTheHydrogenAtom' );
+  var Node = require( 'SCENERY/nodes/Node' );
+  var Rectangle = require( 'SCENERY/nodes/Rectangle' );
+  var RoundMomentaryButton = require( 'SUN/buttons/RoundMomentaryButton' );
+  var RoundStickyToggleButton = require( 'SUN/buttons/RoundStickyToggleButton' );
+
+  /**
+   * @param {Property.<boolean>} onProperty - is the laser on?
+   * @param {Object} [options]
+   * @constructor
+   */
+  function LaserPointerNode( onProperty, options ) {
+
+    options = _.extend( {
+
+      // nozzle and body options
+      bodySize: new Dimension2( 78, 110 ),
+      nozzleSize: new Dimension2( 60, 20 ),
+      baseColor: 'rgb( 50, 50, 50 )',
+      highlightColor: 'rgb( 245, 245, 245 )',
+      stroke: 'black',
+      cornerRadius: 5,
+
+      // button options
+      buttonType: 'toggle', // {string} 'toggle'|'momentary'
+      buttonColor: 'red',
+      buttonRadius: 22,
+      buttonTouchExpansion: 15
+
+    }, options );
+
+    // validate options
+    assert && assert( options.buttonType === 'toggle' || options.buttonType === 'momentary',
+      'invalid buttonType: ' + options.buttonType );
+
+    // the narrow part that the light will come out of
+    var nozzleNode = new Rectangle( 0, 0, options.nozzleSize.width + options.cornerRadius, options.nozzleSize.height, {
+      cornerRadius: options.cornerRadius,
+      fill: new LinearGradient( 0, 0, options.nozzleSize.width, 0 )
+        .addColorStop( 0, options.baseColor )
+        .addColorStop( 0.3, options.highlightColor )
+        .addColorStop( 1, options.baseColor ),
+      stroke: options.stroke
+    } );
+
+    // the main body of the laser pointer
+    var bodyNode = new Rectangle( 0, 0, options.bodySize.width, options.bodySize.height, {
+      cornerRadius: options.cornerRadius,
+      fill: new LinearGradient( 0, 0, options.bodySize.width, 0 )
+        .addColorStop( 0, options.baseColor )
+        .addColorStop( 0.3, options.highlightColor )
+        .addColorStop( 1, options.baseColor ),
+      stroke: options.stroke,
+      centerX: nozzleNode.centerX,
+      top: nozzleNode.bottom - options.cornerRadius // overlap to hide corner radius
+    } );
+
+    // the button that controls whether the laser is on or off
+    var buttonOptions = {
+      radius: options.buttonRadius,
+      touchExpansion: options.buttonTouchExpansion,
+      baseColor: options.buttonColor,
+      center: bodyNode.center
+    };
+    // @private
+    this.button = ( options.buttonType === 'toggle' ) ?
+                 new RoundStickyToggleButton( false, true, onProperty, buttonOptions ) :
+                 new RoundMomentaryButton( false, true, onProperty, buttonOptions );
+
+    // @private called by dispose
+    this.disposeLaserPointerNode = function() {
+      this.button.dispose();
+    };
+
+    options.children = [ nozzleNode, bodyNode, this.button ];
+    Node.call( this, options );
+  }
+
+  modelsOfTheHydrogenAtom.register( 'LaserPointerNode', LaserPointerNode );
+
+  return inherit( Node, LaserPointerNode, {
+
+    // @public
+    dispose: function() {
+      this.disposeLaserPointerNode();
+    },
+
+    /**
+     * Sets the enabled state of the laser's button.
+     * @param {boolean} value
+     * @public
+     */
+    setEnabled: function( value ) {
+      this.button.enabled = value;
+    },
+    set enabled( value ) { this.setEnabled( value ); },
+
+    /**
+     * Gets the enabled state of the laser's button.
+     * @returns {boolean}
+     * @public
+     */
+    getEnabled: function() {return this.button.enabled; },
+    get enabled() { return this.getEnabled(); }
+  } );
+} );