Creating geometric elements: Difference between revisions
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(New page: Through the variable board new geometry elements can be added to the board. All elements are added with the method createElement(): <source lang="javascript"> board.createElement('point', [1,3], {n...) |
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Through the variable board new geometry elements can be added to the board. All elements are added with the method | Through the variable board new geometry elements can be added to the board. All elements are added with the method create(): | ||
<source lang="javascript"> | <source lang="javascript"> | ||
board. | board.create('point', [1,3], {name:'A', strokecolor:'red'}); | ||
</source> | </source> | ||
Another example: | Another example: | ||
<source lang="javascript"> | <source lang="javascript"> | ||
board. | board.create('point', [function(){return s.X();},function(){return t.X()}], {trace:true}); | ||
</source> | </source> | ||
The parameters of | The parameters of create() are: | ||
<source lang="javascript"> | <source lang="javascript"> | ||
board. | board.create(elementType, parentElements, attributes); | ||
</source> | </source> | ||
where | where | ||
*elementType is a string containing the type of the element which is constructed. At the moment, possible types are: | *elementType is a string containing the type of the element which is constructed. At the moment, possible types are: | ||
**primitive elements | **[[primitive elements]] like points and lines | ||
**[[composite elements]] like bisectors, midpoints | |||
**composite elements | |||
*parentElements is an array containing the parameters which define the element. This can be parent elements like two points which define a line. It can also consist of JavaScript functions, numbers, and strings containing GEONExT syntax. The possible array elements depend on the element type. | *parentElements is an array containing the parameters which define the element. This can be parent elements like two points which define a line. It can also consist of JavaScript functions, numbers, and strings containing GEONExT syntax. The possible array elements depend on the element type. | ||
*attributes is a JavaScript object. Usually it is given in the "literal object" form | *attributes is a JavaScript object. Usually it is given in the "literal object" form | ||
| Line 45: | Line 20: | ||
{key1:value1, key2:value2, ...} | {key1:value1, key2:value2, ...} | ||
</source> | </source> | ||
[[Point]] is an easy example. | |||
*Properties of a point: | *Properties of a point: | ||
**style | **style | ||
| Line 63: | Line 39: | ||
*Additional properties for an element: | *Additional properties for an element: | ||
**needsRegularUpdate = [true]/false (eg axis are set to needsRegularUpdate=false) These elements are updated only, if the origin of the board is moved or after zooming | **needsRegularUpdate = [true]/false (eg axis are set to needsRegularUpdate=false) These elements are updated only, if the origin of the board is moved or after zooming | ||
===See our [http://jsxgraph.uni-bayreuth.de/docs Reference] for the properties/attributes available for each element=== | |||
Latest revision as of 07:48, 9 June 2011
Through the variable board new geometry elements can be added to the board. All elements are added with the method create():
board.create('point', [1,3], {name:'A', strokecolor:'red'});
Another example:
board.create('point', [function(){return s.X();},function(){return t.X()}], {trace:true});
The parameters of create() are:
board.create(elementType, parentElements, attributes);
where
- elementType is a string containing the type of the element which is constructed. At the moment, possible types are:
- primitive elements like points and lines
- composite elements like bisectors, midpoints
- parentElements is an array containing the parameters which define the element. This can be parent elements like two points which define a line. It can also consist of JavaScript functions, numbers, and strings containing GEONExT syntax. The possible array elements depend on the element type.
- attributes is a JavaScript object. Usually it is given in the "literal object" form
{key1:value1, key2:value2, ...}
Point is an easy example.
- Properties of a point:
- style
- strokeColor
- strokeWidth
- fillColor
- highlightStrokeColor
- highlightFillColor
- labelColor
- visible
- fixed
- draft
- trace
- Additional properties of a line:
- straightFirst
- straightLast
There are no additional properties of a circle
- Additional properties for an element:
- needsRegularUpdate = [true]/false (eg axis are set to needsRegularUpdate=false) These elements are updated only, if the origin of the board is moved or after zooming
