Difference between revisions of "Highlight curve via slider"

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Line 1: Line 1:
 
Depending on the value of the slider ''s'', one of the curves is highlighted.
 
Depending on the value of the slider ''s'', one of the curves is highlighted.
<jsxgraph height="500" width="600" board="board"  box="jxgbox">
+
<jsxgraph height="500" width="500" board="board"  box="jxgbox">
board = JXG.JSXGraph.initBoard('jxgbox', {originX: 250, originY: 250, unitX: 25, unitY: 25});
+
board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10]});
var s = board.createElement('slider', [[1,8],[5,8],[0,0,1]]);
+
var s = board.create('slider', [[1,8],[5,8],[0,0,1]]);
  
var g = board.createElement('functiongraph', [function(x){ return x*x;}],
+
var g = board.create('functiongraph', [function(x){ return x*x;}],
 
                     {
 
                     {
 
                         strokeColor:function(){ return (s.Value()<0.5)?'red':'blue';},
 
                         strokeColor:function(){ return (s.Value()<0.5)?'red':'blue';},
                         strokeWidth:function(){ return (s.Value()<0.5)?4:1;},
+
                         strokeWidth:function(){ return (s.Value()<0.5)?4:1;}
 
                     });
 
                     });
var f = board.createElement('functiongraph', [function(x){ return x+1;}],
+
var f = board.create('functiongraph', [function(x){ return x+1;}],
 
                     {
 
                     {
 
                         strokeColor:function(){ return (s.Value()>=0.5)?'red':'blue';},
 
                         strokeColor:function(){ return (s.Value()>=0.5)?'red':'blue';},
                         strokeWidth:function(){ return (s.Value()>=0.5)?4:1;},
+
                         strokeWidth:function(){ return (s.Value()>=0.5)?4:1;}
 
                     });
 
                     });
 
</jsxgraph>
 
</jsxgraph>
Line 18: Line 18:
 
===The underlying JavaScript code===
 
===The underlying JavaScript code===
 
<source lang="javascript">
 
<source lang="javascript">
var s = board.createElement('slider', [[1,8],[5,8],[0,0,1]]);
+
board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10]});
 +
var s = board.create('slider', [[1,8],[5,8],[0,0,1]]);
  
var g = board.createElement('functiongraph', [function(x){ return x*x;}],
+
var g = board.create('functiongraph', [function(x){ return x*x;}],
 
         {
 
         {
 
           strokeColor:function(){ return (s.Value()<0.5)?'red':'blue';},
 
           strokeColor:function(){ return (s.Value()<0.5)?'red':'blue';},
           strokeWidth:function(){ return (s.Value()<0.5)?4:1;},
+
           strokeWidth:function(){ return (s.Value()<0.5)?4:1;}
 
         });
 
         });
var f = board.createElement('functiongraph', [function(x){ return x+1;}],
+
var f = board.create('functiongraph', [function(x){ return x+1;}],
 
         {
 
         {
 
           strokeColor:function(){ return (s.Value()>=0.5)?'red':'blue';},
 
           strokeColor:function(){ return (s.Value()>=0.5)?'red':'blue';},
           strokeWidth:function(){ return (s.Value()>=0.5)?4:1;},
+
           strokeWidth:function(){ return (s.Value()>=0.5)?4:1;}
 
         });
 
         });
 
</source>
 
</source>
  
 
[[Category:Examples]]
 
[[Category:Examples]]

Latest revision as of 09:15, 8 June 2011

Depending on the value of the slider s, one of the curves is highlighted.

The underlying JavaScript code

board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10]});
var s = board.create('slider', [[1,8],[5,8],[0,0,1]]);

var g = board.create('functiongraph', [function(x){ return x*x;}],
         {
          strokeColor:function(){ return (s.Value()<0.5)?'red':'blue';},
          strokeWidth:function(){ return (s.Value()<0.5)?4:1;}
         });
var f = board.create('functiongraph', [function(x){ return x+1;}],
         {
          strokeColor:function(){ return (s.Value()>=0.5)?'red':'blue';},
          strokeWidth:function(){ return (s.Value()>=0.5)?4:1;}
         });