Adding events

Please note: This only works when the SVG or VML renderer is used. With the Canvas renderer the rendNode property is undefined. The JSXGraph event handling system works with Canvas, too: Adding events 2.

 

<p id="myOutput">&nbsp;</p>

var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-4,4,4,-4], keepaspectratio:true});
var myPoint = brd.create('point',[1,1], {size:5});
JXG.addEvent(myPoint.rendNode, 'mouseover', 
             function(){ document.getElementById('myOutput').innerHTML = "Point "+this.name;}, 
             myPoint);
JXG.addEvent(myPoint.rendNode, 'mouseout', 
             function(){document.getElementById('myOutput').innerHTML = ' ';}, 
             myPoint);
myPoint.hasPoint = function(){return false; };  // User can not move "A" anymore.

var myPoint2 = brd.create('point',[-1,1], {size:5});
JXG.addEvent(myPoint2.rendNode, 'mouseover', 
             function(){ document.getElementById('myOutput').innerHTML = "Point "+this.name;}, 
             myPoint2);
JXG.addEvent(myPoint2.rendNode, 'mouseout', 
             function(){document.getElementById('myOutput').innerHTML = ' ';}, 
             myPoint2);