Difference between revisions of "Adding events 2"

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It is possible to supply user-defined defined functions for certain events.
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The user-defined functions are called additionally to the default JSXGraph events. For the events "down" and "up" the user-supplied event handlers are called before the default JSXGraph event handler.  For the event "update" the user-supplied  handler is called after the default JSXGraph event handler which is an update of the board.
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An user-supplied event handler can be defined by the method "on":
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<source lang="javascript">
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  var p = board.create('point',[1,1]);
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  p.on('update', function(){ /* do something ... */);
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</source>
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The possible events  ar
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* update
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* hit, mousehit
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* drag, mousedrag, touchdrag
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* move, mousemove, touchmove
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* over, mouseover
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* out, mouseout
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* up, mouseup, touchend
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* down, mousedown, touchstart
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<html>
 
<html>
 
<p id="myOutput">&nbsp;</p>
 
<p id="myOutput">&nbsp;</p>

Revision as of 09:41, 26 October 2012

It is possible to supply user-defined defined functions for certain events. The user-defined functions are called additionally to the default JSXGraph events. For the events "down" and "up" the user-supplied event handlers are called before the default JSXGraph event handler. For the event "update" the user-supplied handler is called after the default JSXGraph event handler which is an update of the board.

An user-supplied event handler can be defined by the method "on":

   var p = board.create('point',[1,1]);
   p.on('update', function(){ /* do something ... */);

The possible events ar

  • update
  • hit, mousehit
  • drag, mousedrag, touchdrag
  • move, mousemove, touchmove
  • over, mouseover
  • out, mouseout
  • up, mouseup, touchend
  • down, mousedown, touchstart

 

<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, fixed: true});
myPoint.on('over', function(){
    document.getElementById('myOutput').innerHTML = "Point "+this.name;
});
myPoint.on('out', function(){
    document.getElementById('myOutput').innerHTML = '&nbsp;';
});

var myPoint2 = brd.create('point',[-1,1], {size:5});
myPoint2.on('over', function(){
    document.getElementById('myOutput').innerHTML = "Point "+this.name;
});
myPoint2.on('out', function(){
    document.getElementById('myOutput').innerHTML = '&nbsp;';
});