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Class JXG.GeometryElement


      ↳ JXG.GeometryElement

This is the basic class for geometry elements like points, circles and lines.

Defined in: element.js.

Class Summary
Constructor Attributes Constructor Name and Description
 
JXG.GeometryElement(board, attributes, type, oclass)
Constructs a new GeometryElement object.
Attributes Summary
Field Attributes Field Name and Description
 
Determines the elements border-style.
 
If true, the dash pattern is multiplied by strokeWidth / 2.
 
If draft.draft: true the element will be drawn in grey scale colors (as default) to visualize that it's only a draft.
 
If the element is dragged it will be moved on mousedown or touchstart to the top of its layer.
 
The fill color of this geometry element.
 
Opacity for fill color.
 
If true the element is fixed and can not be dragged around.
 
If true the element is fixed and can not be dragged around.
 
Gradient type.
 
Angle (in radians) of the gradiant in case the gradient is of type 'linear'.
 
From the SVG specification: ‘cx’, ‘cy’ and ‘r’ define the largest (i.e.
 
From the SVG specification: ‘cx’, ‘cy’ and ‘r’ define the largest (i.e.
 
The gradientEndOffset attribute is a number (ranging from 0 to 1) which indicates where the second gradient stop is placed, see the SVG specification for more information.
 
This attribute defines the radius of the start circle of the radial gradient.
 
‘fx’ and ‘fy’ define the focal point for the radial gradient.
 
y-coordinate of the circle center for the second color in case of gradient 'radial'.
 
From the SVG specification: ‘cx’, ‘cy’ and ‘r’ define the largest (i.e.
 
Second color for gradient.
 
Opacity of second gradient color.
 
The gradientStartOffset attribute is a number (ranging from 0 to 1) which indicates where the first gradient stop is placed, see the SVG specification for more information.
 
 
The fill color of the given geometry element when the mouse is pointed over it.
 
Opacity for fill color when the object is highlighted.
 
The stroke color of the given geometry element when the user moves the mouse over it.
 
Opacity for stroke color when the object is highlighted.
 
Width of the element's stroke when the mouse is pointed over it.
<private>  
 
Display layer which will contain the element.
 
Line endings (linecap) of a stroke element, i.e.
 
If this is set to true, the element is updated in every update call of the board.
 
If some size of an element is controlled by a function, like the circle radius or segments of fixed length, this attribute controls what happens if the value is negative.
 
Precision options for JSXGraph elements.
 
A private element will be inaccessible in certain environments, e.g.
 
Determines whether two-finger manipulation may rotate this object.
 
Determines whether two-finger manipulation of this object may change its size.
 
If enabled:true the (stroke) element will get a customized shadow.
 
Snaps the element or its parents to the grid.
 
The stroke color of the given geometry element.
 
Opacity for element's stroke color.
 
Width of the element's stroke.
 
Controls if an element can get the focus with the tab key.
 
If true the element will be traced, i.e.
 
Extra visual properties for traces of an element
 
Transition duration (in milliseconds) for certain cahnges of properties like color and opacity.
 
Properties which change smoothly in the time set in transitionDuration.
 
Set individual viewport for an element.
 
If false the element won't be visible on the board, otherwise it is shown.
 
If true a label will display the element's name.
Field Summary
Field Attributes Field Name and Description
<private> <constant>  
Original type of the element at construction time.
<private>  
The position of this element inside the JXG.Board#objectsList.
 
Elements on which this element depends on are stored here.
<private>  
 
Reference to the board associated with the element.
 
Stores all dependent objects to be updated when this point is moved.
 
Elements depending on this element are stored here.
 
The element is saved with an explicit entry in the file (true) or implicitly via a composition.
<constant>  
The element's class.
 
The string used with JXG.Board#create
 
If element has a label subelement then this property will be set to true.
 
True, if the element is currently highlighted.
 
id
Unique identifier for the element.
 
Inherits contains the subelements, which may have an attribute (in particular the attribute "visible") having value 'inherit'.
 
Controls if this element can be dragged.
 
If element is in two dimensional real space this is true, else false.
 
Time stamp containing the last time this element has been dragged.
 
The methodMap determines which methods can be called from within JessieCode and under which name it can be used.
 
Is the mouse over this element?
 
Not necessarily unique name for the element.
 
Controls if updates are necessary
 
Stores all Intersection Objects which in this moment are not real and so hide this element.
 
Counts the number of objects drawn as part of the trace of the element.
 
Ids of elements on which this element depends directly are stored here.
 
Quadratic form representation of circles (and conics)
 
Stores the SVG (or VML) rendering node for the element.
 
[c, b0, b1, a, k, r, q0, q1] See A.E.
 
Subs contains the subelements, created during the create method.
 
Stores variables for symbolic computations
 
Keeps track of all objects drawn as part of the trace of the element.
 
Stores the transformations which are applied during update in an array
<constant>  
Type of the element.
 
An associative array containing all visual properties.
 
An associative array containing visual properties which are calculated from the attribute values (i.e.
Method Summary
Method Attributes Method Name and Description
<private>  
_set(key, value)
Sets the value of attribute key to value.
 
addChild(obj)
Add an element as a child to the current element.
<private>  
<static>  
JXG.GeometryElement.addEvent()
 
addParents(parents)
Adds ids of elements to the array this.parents.
<private>  
addParentsFromJCFunctions(function_array)
Add dependence on elements in JessieCode functions.
 
addRotation(angle)
Rotate texts or images by a given degree.
 
addTicks(ticks)
Adds ticks to this line or curve.
 
addTransform(transform)
Add transformations to this element.
 
animate(hash, time, options)
Animates properties for that object like stroke or fill color, opacity and maybe even more later.
 
Dimensions of the smallest rectangle enclosing the element.
 
Removes all objects generated by the trace function.
 
Copy the element to background.
<private>  
Counts the direct children of an object without counting labels.
<private>  
Creates a gradient nodes in the renderer.
 
Creates a label element for this geometry element.
<private>  
Decides whether an element can be dragged.
 
formatNumberLocale(value, digits)
Format a number according to the locale set in the attribute "intl".
<private>  
fullUpdate(visible)
Run through the full update chain of an element.
 
Array of strings containing the polynomials defining the element.
 
Get the value of the property key.
 
Retrieve a copy of the current visProp.
 
Returns the coords object where the label of the element shall be drawn.
 
Returns the elements name.
 
List of the element ids resp.
<deprecated>  
Deprecated alias for JXG.GeometryElement#getAttribute.
<private>  
Determine values of snapSizeX and snapSizeY.
 
Returns the coords object where a text that is bound to the element shall be drawn.
 
The type of the element as used in JXG.Board#create.
 
handleSnapToGrid(force, fromParent)
Move an element to its nearest grid point.
 
hasPoint(x, y)
Checks whether (x,y) is near the element.
 
hide()
Hide the element.
 
Hide the element.
 
Uses the "normal" properties of the element.
<private>  
Normalize the element's standard form.
<private>  
Notify all child elements for updates.
 
Removes the element from the construction.
 
Removes all ticks from a line or curve.
 
Remove an element as a child from the current element.
<private>  
Removes the given object from the descendants list of this object and all its child objects.
<static>  
JXG.GeometryElement.removeEvent()
 
Removes ticks identified by parameter named tick from this line or curve.
<private>  
resolveShortcuts(attributes)
Resolves attribute shortcuts like color and expands them, e.g.
 
setArrow(firstArrow, lastArrow)
Determines whether the element has arrows at start or end of the arc.
 
setAttribute(attributes)
Sets an arbitrary number of attributes.
<private>  
setDash(dash)
Set the dash style of an object.
<private>  
Show the element or hide it.
 
setLabel(str)
Sets a label and its text If label doesn't exist, it creates one
 
Updates the element's label text, strips all html.
 
setName(str)
Updates the element's label text and the element's attribute "name", strips all html.
 
setParents(parents)
Sets ids of elements to the array this.parents.
 
setPosition(method, coords)
Translates the object by (x, y).
 
setPositionDirectly(method, coords, oldcoords)
Moves an element by the difference of two coordinates.
<deprecated>  
Deprecated alias for JXG.GeometryElement#setAttribute.
 
show()
Make the element visible.
 
Make the element visible.
<private>  
Snaps the element to points.
 
General update method.
<private>  
Provide updateRenderer method.
<private>  
updateVisibility(parent_val)
Set the visibility of an element.
 
Checks if locale is enabled in the attribute.
Event Summary
Event Attributes Event Name and Description
 
attribute(o, el)
Notify every time an attribute is changed.
 
attribute:key(val, nval, el)
This is a generic event handler.
 
down(e)
Whenever the user starts to touch or click an element.
 
drag(e)
This event is fired whenever the user drags an element.
 
This event is fired whenever the user drags the element by pressing arrow keys on the keyboard.
 
Whenever the user starts to click an element.
 
This event is fired whenever the user drags the element with a mouse.
 
This event is fired whenever the user is moving the mouse over an element.
 
This event is fired whenever the user puts the mouse away from an element.
 
This event is fired whenever the user puts the mouse over an element.
 
Whenever the user releases the mousebutton over an element.
 
move(e)
This event is fired whenever the user is moving over an element.
 
out(e)
This event is fired whenever the user is leaving an element.
 
over(e)
This event is fired whenever the user is hovering over an element.
 
Whenever the user taps an element with the pen.
 
This event is fired whenever the user drags the element with a pen.
 
penup(e)
Whenever the user lifts the pen over an element.
 
Whenever the user starts to touch an element.
 
This event is fired whenever the user drags the element on a touch device.
 
Whenever the user stops touching an element.
 
up(e)
Whenever the user stops to touch or click an element.
Class Detail
JXG.GeometryElement(board, attributes, type, oclass)
Constructs a new GeometryElement object.
Parameters:
{JXG.Board} board
Reference to the board the element is constructed on.


{Object} attributes
Hash of attributes and their values.


{Number} type
Element type (a JXG.OBJECT_TYPE_ value).


{Number} oclass
The element's class (a JXG.OBJECT_CLASS_ value).


Attribute Detail
{Number} dash
Determines the elements border-style. Possible values are: The dash patterns are defined in JXG.AbstractRenderer#dashArray.
Defined in: options.js.
See:
JXG.GeometryElement#lineCap
JXG.AbstractRenderer#dashArray
Default Value:
0

{Boolean} dashScale
If true, the dash pattern is multiplied by strokeWidth / 2.
Defined in: options.js.
See:
JXG.GeometryElement#dash
JXG.AbstractRenderer#dashArray
Default Value:
false

{Object} draft
If draft.draft: true the element will be drawn in grey scale colors (as default) to visualize that it's only a draft.
Defined in: options.js.
Default Value:
JXG.Options.elements.draft#draft

{Boolean} dragToTopOfLayer
If the element is dragged it will be moved on mousedown or touchstart to the top of its layer. Works only for SVG renderer and for simple elements consisting of one SVG node.
Defined in: options.js.
var li1 = board.create('line', [1, 1, 1], {strokeWidth: 20, dragToTopOfLayer: true});
var li2 = board.create('line', [1, -1, 1], {strokeWidth: 20, strokeColor: 'red'});


					
					

						
						
						
						
							
Default Value:
false

{String} fillColor
The fill color of this geometry element.
Defined in: options.js.
See:
JXG.GeometryElement#highlightFillColor
JXG.GeometryElement#fillOpacity
JXG.GeometryElement#highlightFillOpacity
Default Value:
JXG.palette.red

{Number} fillOpacity
Opacity for fill color.
Defined in: options.js.
See:
JXG.GeometryElement#fillColor
JXG.GeometryElement#highlightFillColor
JXG.GeometryElement#highlightFillOpacity
Default Value:
1

{Boolean} fixed
If true the element is fixed and can not be dragged around. The element will be repositioned on zoom and moveOrigin events.
Defined in: options.js.
Default Value:
false

{Boolean} frozen
If true the element is fixed and can not be dragged around. The element will even stay at its position on zoom and moveOrigin events. Only free elements like points, texts, images, curves can be frozen. For slider elements, the subobjects point1 and point2 have to be "frozen".
Defined in: options.js.
var txt = board.create('text', [1, 2, 'Hello'], {frozen: true, fontSize: 24});
var sli = board.create('slider', [[-4, 4], [-1.5, 4], [-10, 1, 10]], {
    name:'a',
    point1: {frozen: true},
    point2: {frozen: true}
});


					
					

						
						
						
						
							
Default Value:
false

{String} gradient
Gradient type. Possible values are 'linear'. 'radial' or null.
Defined in: options.js.
    var a = board.create('slider', [[0, -0.2], [3.5, -0.2], [0, 0, 2 * Math.PI]], {name: 'angle'});
    var b = board.create('slider', [[0, -0.4], [3.5, -0.4], [0, 0, 1]], {name: 'offset1'});
    var c = board.create('slider', [[0, -0.6], [3.5, -0.6], [0, 1, 1]], {name: 'offset2'});

    var pol = board.create('polygon', [[0, 0], [4, 0], [4,4], [0,4]], {
                fillOpacity: 1,
                fillColor: 'yellow',
                gradient: 'linear',
                gradientSecondColor: 'blue',
                gradientAngle: function() { return a.Value(); },
                gradientStartOffset: function() { return b.Value(); },
                gradientEndOffset: function() { return c.Value(); },
                hasInnerPoints: true
        });


					
					
    var cx = board.create('slider', [[0, -.2], [3.5, -.2], [0, 0.5, 1]], {name: 'cx, cy'});
    var fx = board.create('slider', [[0, -.4], [3.5, -.4], [0, 0.5, 1]], {name: 'fx, fy'});
    var o1 = board.create('slider', [[0, -.6], [3.5, -.6], [0, 0.0, 1]], {name: 'offset1'});
    var o2 = board.create('slider', [[0, -.8], [3.5, -.8], [0, 1, 1]], {name: 'offset2'});
    var r = board.create('slider', [[0, -1], [3.5, -1], [0, 0.5, 1]], {name: 'r'});
    var fr = board.create('slider', [[0, -1.2], [3.5, -1.2], [0, 0, 1]], {name: 'fr'});

    var pol = board.create('polygon', [[0, 0], [4, 0], [4,4], [0,4]], {
                fillOpacity: 1,
                fillColor: 'yellow',
                gradient: 'radial',
                gradientSecondColor: 'blue',
                gradientCX: function() { return cx.Value(); },
                gradientCY: function() { return cx.Value(); },
                gradientR: function() { return r.Value(); },
                gradientFX: function() { return fx.Value(); },
                gradientFY: function() { return fx.Value(); },
                gradientFR: function() { return fr.Value(); },
                gradientStartOffset: function() { return o1.Value(); },
                gradientEndOffset: function() { return o2.Value(); },
                hasInnerPoints: true
    });


					
					

						
						
						
							
See:
JXG.GeometryElement#gradientSecondColor
JXG.GeometryElement#gradientSecondOpacity
Default Value:
null

{Number} gradientAngle
Angle (in radians) of the gradiant in case the gradient is of type 'linear'. If the angle is 0, the first color is on the left and the second color is on the right. If the angle is π/2 the first color is on top and the second color at the bottom.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
Default Value:
0

{Number} gradientCX
From the SVG specification: ‘cx’, ‘cy’ and ‘r’ define the largest (i.e., outermost) circle for the radial gradient. The gradient will be drawn such that the 100% gradient stop is mapped to the perimeter of this largest (i.e., outermost) circle. For radial gradients in canvas this is the value 'x1'. Takes a value between 0 and 1.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientCY
JXG.GeometryElement#gradientR
Default Value:
0.5

{Number} gradientCY
From the SVG specification: ‘cx’, ‘cy’ and ‘r’ define the largest (i.e., outermost) circle for the radial gradient. The gradient will be drawn such that the 100% gradient stop is mapped to the perimeter of this largest (i.e., outermost) circle. For radial gradients in canvas this is the value 'y1'. Takes a value between 0 and 1.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientCX
JXG.GeometryElement#gradientR
Default Value:
0.5

{Number} gradientEndOffset
The gradientEndOffset attribute is a number (ranging from 0 to 1) which indicates where the second gradient stop is placed, see the SVG specification for more information. For linear gradients, this attribute represents a location along the gradient vector. For radial gradients, it represents a percentage distance from (fx,fy) to the edge of the outermost/largest circle.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientStartOffset
Default Value:
1.0

{Number} gradientFR
This attribute defines the radius of the start circle of the radial gradient. The gradient will be drawn such that the 0% <stop> is mapped to the perimeter of the start circle. For radial gradients in canvas this is the value 'r0'. Takes a value between 0 and 1.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientFX
JXG.GeometryElement#gradientFY
Default Value:
0.0

{Number} gradientFX
‘fx’ and ‘fy’ define the focal point for the radial gradient. The gradient will be drawn such that the 0% gradient stop is mapped to (fx, fy). For radial gradients in canvas this is the value 'x0'. Takes a value between 0 and 1.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientFY
JXG.GeometryElement#gradientFR
Default Value:
0.5

{Number} gradientFY
y-coordinate of the circle center for the second color in case of gradient 'radial'. (The attribute fy in SVG) For radial gradients in canvas this is the value 'y0'. Takes a value between 0 and 1.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientFX
JXG.GeometryElement#gradientFR
Default Value:
0.5

{Number} gradientR
From the SVG specification: ‘cx’, ‘cy’ and ‘r’ define the largest (i.e., outermost) circle for the radial gradient. The gradient will be drawn such that the 100% gradient stop is mapped to the perimeter of this largest (i.e., outermost) circle. For radial gradients in canvas this is the value 'r1'. Takes a value between 0 and 1.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientCX
JXG.GeometryElement#gradientCY
Default Value:
0.5

{String} gradientSecondColor
Second color for gradient.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientSecondOpacity
Default Value:
'#ffffff'

{Number} gradientSecondOpacity
Opacity of second gradient color. Takes a value between 0 and 1.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientSecondColor
Default Value:
1

{Number} gradientStartOffset
The gradientStartOffset attribute is a number (ranging from 0 to 1) which indicates where the first gradient stop is placed, see the SVG specification for more information. For linear gradients, this attribute represents a location along the gradient vector. For radial gradients, it represents a percentage distance from (fx,fy) to the edge of the outermost/largest circle.
Defined in: options.js.
See:
JXG.GeometryElement#gradient
JXG.GeometryElement#gradientEndOffset
Default Value:
0.0

{Boolean} highlight

Defined in: options.js.
Default Value:
true

{String} highlightFillColor
The fill color of the given geometry element when the mouse is pointed over it.
Defined in: options.js.
See:
JXG.GeometryElement#fillColor
JXG.GeometryElement#fillOpacity
JXG.GeometryElement#highlightFillOpacity
Default Value:
'none'

{Number} highlightFillOpacity
Opacity for fill color when the object is highlighted.
Defined in: options.js.
See:
JXG.GeometryElement#fillColor
JXG.GeometryElement#highlightFillColor
JXG.GeometryElement#fillOpacity
Default Value:
1

{String} highlightStrokeColor
The stroke color of the given geometry element when the user moves the mouse over it.
Defined in: options.js.
See:
JXG.GeometryElement#strokeColor
JXG.GeometryElement#strokeWidth
JXG.GeometryElement#strokeOpacity
JXG.GeometryElement#highlightStrokeOpacity
Default Value:
'#c3d9ff'

{Number} highlightStrokeOpacity
Opacity for stroke color when the object is highlighted.
Defined in: options.js.
See:
JXG.GeometryElement#strokeColor
JXG.GeometryElement#highlightStrokeColor
JXG.GeometryElement#strokeWidth
JXG.GeometryElement#strokeOpacity
Default Value:
1

{Number} highlightStrokeWidth
Width of the element's stroke when the mouse is pointed over it.
Defined in: options.js.
See:
JXG.GeometryElement#strokeColor
JXG.GeometryElement#highlightStrokeColor
JXG.GeometryElement#strokeOpacity
JXG.GeometryElement#highlightStrokeOpacity
JXG.GeometryElement#highlightFillColor
Default Value:
2

<private> isLabel

Defined in: options.js.
Default Value:
false

layer
Display layer which will contain the element.
Defined in: options.js.
See:
JXG.Options#layer
Default Value:
See JXG.Options#layer

{String} lineCap
Line endings (linecap) of a stroke element, i.e. line, circle, curve. Possible values are: Not available for VML renderer.
Defined in: options.js.
Default Value:
'butt'

{Boolean} needsRegularUpdate
If this is set to true, the element is updated in every update call of the board. If set to false, the element is updated only after zoom events or more generally, when the bounding box has been changed. Examples for the latter behavior should be axes.
Defined in: options.js.
See:
JXG.GeometryElement#needsRegularUpdate
Default Value:
true

{Boolean} nonnegativeOnly
If some size of an element is controlled by a function, like the circle radius or segments of fixed length, this attribute controls what happens if the value is negative. By default, the absolute value is taken. If true, the maximum of 0 and the value is used.
Defined in: options.js.
var slider = board.create('slider', [[4, -3], [4, 3], [-4, 1, 4]], { name: 'a'});
var circle = board.create('circle', [[-1, 0], 1], {
    nonnegativeOnly: true
});
circle.setRadius('a');         // Use JessieCode
var seg = board.create('segment', [[-4, 3], [0, 3], () => slider.Value()], {
    point1: {visible: true},
    point2: {visible: true},
    nonnegativeOnly: true
});


					
					

						
						
						
						
							
Default Value:
false

precision
Precision options for JSXGraph elements. This attributes takes either the value 'inherit' or an object of the form:
precision: {
     touch: 30,
     mouse: 4,
     pen: 4
}
In the first case, the global, JSXGraph-wide values of JXGraph.Options.precision are taken.
Defined in: options.js.
See:
JXG.Options#precision
Default Value:
'inherit'

{Boolean} priv
A private element will be inaccessible in certain environments, e.g. a graphical user interface.
Defined in: options.js.
Default Value:
false

{Boolean} rotatable
Determines whether two-finger manipulation may rotate this object. If set to false, the object can only be scaled and translated.

In case the element is a polygon or line and it has the attribute "rotatable:false", moving the element with two fingers results in a rotation or translation.

If an element is set to be neither scalable nor rotatable, it can only be translated.

In case of a polygon, scaling is only possible if no vertex has snapToGrid or snapToPoints enabled and no vertex is fixed by some other constraint. Also, the polygon itself has to have snapToGrid disabled.
Defined in: options.js.

See:
JXG.GeometryElement#scalable
Default Value:
true

{Boolean} scalable
Determines whether two-finger manipulation of this object may change its size. If set to false, the object is only rotated and translated.

In case the element is a horizontal or vertical line having ticks, "scalable:true" enables zooming of the board by dragging ticks lines. This feature is enabled, for the ticks element of the line element the attribute "fixed" has to be false and the line element's scalable attribute has to be true.

In case the element is a polygon or line and it has the attribute "scalable:false", moving the element with two fingers results in a rotation or translation.

If an element is set to be neither scalable nor rotatable, it can only be translated.

In case of a polygon, scaling is only possible if no vertex has snapToGrid or snapToPoints enabled and no vertex is fixed by some other constraint. Also, the polygon itself has to have snapToGrid disabled.
Defined in: options.js.

See:
JXG.Ticks#fixed
JXG.GeometryElement#rotatable
Default Value:
true

{Object} shadow
If enabled:true the (stroke) element will get a customized shadow.

Customize color and opacity: If the object's RGB stroke color is [r,g,b] and its opacity is op, and the shadow parameters color is given as [r', g', b'] and opacity as op' the shadow will receive the RGB color

[blend*r + r', blend*g + g', blend*b + b']
and its opacity will be equal to op * op'. Further, the parameters blur and offset can be adjusted.

This attribute is only available with SVG, not with canvas.
Defined in: options.js.

board.options.line.strokeWidth = 2
// No shadow
var li1 = board.create('line', [[-2, 5], [2, 6]], {strokeColor: 'red', shadow: false});

// Default shadow
var li2 = board.create('line', [[-2, 3], [2, 4]], {strokeColor: 'red', shadow: true});

// No shadow
var li3 = board.create('line', [[-2, 1], [2, 2]], {strokeColor: 'blue', shadow: {enabled: false}});

// Shadow uses same color as line
var li4 = board.create('line', [[-2, -1], [2, 0]], {strokeColor: 'blue',
            shadow: {enabled: true, color: '#000000', blend: 1}
        });

// Shadow color as a mixture between black and the line color, additionally set opacity
var li5 = board.create('line', [[-2, -3], [2, -2]], {strokeColor: 'blue',
            shadow: {enabled: true, color: '#000000', blend: 0.5, opacity: 0.5}
        });

// Use different value for blur and offset [dx, dy]
var li6 = board.create('line', [[-2, -5], [2, -4]], {strokeColor: 'blue',
            shadow: {enabled: true, offset:[0, 25], blur: 6}
        });


					
					

						
						
						
						
							
Default Value:
shadow: { enabled: false, color: [0, 0, 0], opacity: 1, blur: 3, blend: 0.1, offset: [5, 5] }

{Boolean} snapToGrid
Snaps the element or its parents to the grid. Currently only relevant for points, circles, and lines. Points are snapped to grid directly, on circles and lines it's only the parent points that are snapped
Defined in: options.js.
Default Value:
false

{String} strokeColor
The stroke color of the given geometry element.
Defined in: options.js.
See:
JXG.GeometryElement#highlightStrokeColor
JXG.GeometryElement#strokeWidth
JXG.GeometryElement#strokeOpacity
JXG.GeometryElement#highlightStrokeOpacity
Default Value:
JXG.palette.blue

{Number} strokeOpacity
Opacity for element's stroke color.
Defined in: options.js.
See:
JXG.GeometryElement#strokeColor
JXG.GeometryElement#highlightStrokeColor
JXG.GeometryElement#strokeWidth
JXG.GeometryElement#highlightStrokeOpacity
Default Value:
1

{Number} strokeWidth
Width of the element's stroke.
Defined in: options.js.
See:
JXG.GeometryElement#strokeColor
JXG.GeometryElement#highlightStrokeColor
JXG.GeometryElement#strokeOpacity
JXG.GeometryElement#highlightStrokeOpacity
Default Value:
2

{Number} tabindex
Controls if an element can get the focus with the tab key. tabindex corresponds to the HTML attribute of the same name. See description at MDN. The additional value "null" completely disables focus of an element. The value will be ignored if keyboard control of the board is not enabled or the element is fixed or not visible.
Defined in: options.js.
See:
JXG.Board#keyboard
JXG.GeometryElement#fixed
JXG.GeometryElement#visible
Default Value:
0

{Boolean|String} trace
If true the element will be traced, i.e. on every movement the element will be copied to the background. Use JXG.GeometryElement#clearTrace to delete the trace elements. The calling of element.setAttribute({trace:false}) additionally deletes all traces of this element. By calling element.setAttribute({trace:'pause'}) the removal of already existing traces can be prevented. The visual appearance of the trace can be influenced by JXG.GeometryElement#traceAttributes.
Defined in: options.js.
See:
JXG.GeometryElement#clearTrace
JXG.GeometryElement#traces
JXG.GeometryElement#numTraces
JXG.GeometryElement#traceAttributes
Default Value:
false

{Object} traceAttributes
Extra visual properties for traces of an element
Defined in: options.js.
JXG.Options.elements.traceAttributes = {
    size: 2
};

const board = JXG.JSXGraph.initBoard(BOARDID, {
    boundingbox: [-4, 4, 4, -4],
    keepaspectratio: true
});

var p = board.create('point', [0.0, 2.0], {
    trace: true,
    size: 10,
    traceAttributes: {
        color: 'black',
        face: 'x'
    }
});


					
					

						
						
						
							
See:
JXG.GeometryElement#trace
Default Value:
{}

{Number} transitionDuration
Transition duration (in milliseconds) for certain cahnges of properties like color and opacity. The properties can be set in the attribute transitionProperties Works in SVG renderer, only.
Defined in: options.js.
See:
JXG.GeometryElement#transitionProperties
JXG.GeometryElement#strokeColor
JXG.GeometryElement#highlightStrokeColor
JXG.GeometryElement#strokeOpacity
JXG.GeometryElement#highlightStrokeOpacity
JXG.GeometryElement#fillColor
JXG.GeometryElement#highlightFillColor
JXG.GeometryElement#fillOpacity
JXG.GeometryElement#highlightFillOpacity
Default Value:
100 JXG.Options.elements#transitionDuration

{Array} transitionProperties
Properties which change smoothly in the time set in transitionDuration. Possible values are ['fill', 'fill-opacity', 'stroke', 'stroke-opacity', 'stroke-width', 'width', 'height', 'rx', 'ry'] (and maybe more) for geometry elements and ['color', 'opacity', 'all'] for HTML texts.
Defined in: options.js.
var p1 = board.create("point", [0, 2], {
    name: "A",
    highlightStrokeWidth: 10,
    transitionDuration: 1000,
    transitionProperties: ['width', 'height', 'stroke-width',
        'fill', 'fill-opacity', 'rx', 'ry', 'stroke', 'stroke-opacity'] });


					
					

						
						
						
							
See:
JXG.GeometryElement#transitionDuration

viewport
Set individual viewport for an element. If not set to 'inherit', to use the board-wide viewport, an array of the form '[left, top, right, bottom]' has to be given.
Defined in: options.js.
See:
JXG.Board#viewport
Default Value:
'inherit'

{Boolean} visible
If false the element won't be visible on the board, otherwise it is shown.
Defined in: options.js.
See:
JXG.GeometryElement#hideElement
JXG.GeometryElement#showElement
Default Value:
true

{Boolean} withLabel
If true a label will display the element's name. Using this to suppress labels is more efficient than visible:false.
Defined in: options.js.
Default Value:
false
Field Detail
<private> <constant> {Number} _org_type
Original type of the element at construction time. Used for removing glider property.

<private> {Number} _pos
The position of this element inside the JXG.Board#objectsList.
Default Value:
-1

{Object} ancestors
Elements on which this element depends on are stored here.

<private> {JXG.GeometryElement} baseElement
Default Value:
null

{JXG.Board} board
Reference to the board associated with the element.

{Object} childElements
Stores all dependent objects to be updated when this point is moved.

{Object} descendants
Elements depending on this element are stored here.

{Boolean} dump
The element is saved with an explicit entry in the file (true) or implicitly via a composition.
Default Value:
true

<constant> {Number} elementClass
The element's class.

{String} elType
The string used with JXG.Board#create

{Boolean} hasLabel
If element has a label subelement then this property will be set to true.
Default Value:
false

{Boolean} highlighted
True, if the element is currently highlighted.
Default Value:
false

{String} id
Unique identifier for the element. Equivalent to id-attribute of renderer element.

{Object} inherits
Inherits contains the subelements, which may have an attribute (in particular the attribute "visible") having value 'inherit'.

{Boolean} isDraggable
Controls if this element can be dragged. In GEONExT only free points and gliders can be dragged.
Default Value:
false

{Boolean} isReal
If element is in two dimensional real space this is true, else false.
Default Value:
true

{Date} lastDragTime
Time stamp containing the last time this element has been dragged.
Default Value:
creation time

{Object} methodMap
The methodMap determines which methods can be called from within JessieCode and under which name it can be used. The map is saved in an object, the name of a property is the name of the method used in JessieCode, the value of a property is the name of the method in JavaScript.

{Boolean} mouseover
Is the mouse over this element?
Default Value:
false

{String} name
Not necessarily unique name for the element.
See:
JXG.Board#generateName
Default Value:
Name generated by JXG.Board#generateName.

{Boolean} needsUpdate
Controls if updates are necessary
Default Value:
true

{Object} notExistingParents
Stores all Intersection Objects which in this moment are not real and so hide this element.

{Number} numTraces
Counts the number of objects drawn as part of the trace of the element.
See:
JXG.GeometryElement#clearTrace
JXG.GeometryElement#traces

{Object} parents
Ids of elements on which this element depends directly are stored here.

{Array} quadraticform
Quadratic form representation of circles (and conics)
Default Value:
[[1,0,0],[0,1,0],[0,0,1]]

{Object} rendNode
Stores the SVG (or VML) rendering node for the element. This enables low-level access to SVG nodes. The properties of such an SVG node can then be changed by calling setAttribute(). Note that there are a few elements which consist of more than one SVG nodes:
  • Elements with arrow tail or head: rendNodeTriangleStart, rendNodeTriangleEnd
  • SVG (or VML) texts: rendNodeText
  • Button: rendNodeForm, rendNodeButton, rendNodeTag
  • Checkbox: rendNodeForm, rendNodeCheckbox, rendNodeLabel, rendNodeTag
  • Input: rendNodeForm, rendNodeInput, rendNodeLabel, rendNodeTag
Here is are two examples: The first example shows how to access the SVG node, the second example demonstrates how to change SVG attributes.
    var p1 = board.create('point', [0, 0]);
    console.log(p1.rendNode);
    // returns the full SVG node details of the point p1, something like:
    // <ellipse id='box_jxgBoard1P6' stroke='#ff0000' stroke-opacity='1' stroke-width='2px'
    //   fill='#ff0000' fill-opacity='1' cx='250' cy='250' rx='4' ry='4'
    //   style='position: absolute;'>
    // </ellipse>
    var s = board.create('segment', [p1, p2], {strokeWidth: 60});
    s.rendNode.setAttribute('stroke-linecap', 'round');

{Array} stdform
[c, b0, b1, a, k, r, q0, q1] See A.E. Middleditch, T.W. Stacey, and S.B. Tor: "Intersection Algorithms for Lines and Circles", ACM Transactions on Graphics, Vol. 8, 1, 1989, pp 25-40. The meaning of the parameters is: Circle: points p=[p0, p1] on the circle fulfill a<p, p> + <b, p> + c = 0 For convenience we also store r: radius k: discriminant = sqrt(<b,b>-4ac) q=[q0, q1] center Points have radius = 0. Lines have radius = infinity. b: normalized vector, representing the direction of the line. Should be put into Coords, when all elements possess Coords.
Default Value:
[1, 0, 0, 0, 1, 1, 0, 0]

{Object} subs
Subs contains the subelements, created during the create method.

{Object} symbolic
Stores variables for symbolic computations

{Object} traces
Keeps track of all objects drawn as part of the trace of the element.
See:
JXG.GeometryElement#clearTrace
JXG.GeometryElement#numTraces

{Array} transformations
Stores the transformations which are applied during update in an array
See:
JXG.Transformation

<constant> {Number} type
Type of the element.

{Object} visProp
An associative array containing all visual properties.
Default Value:
empty object

{Object} visPropCalc
An associative array containing visual properties which are calculated from the attribute values (i.e. visProp) and from other constraints. An example: if an intersection point does not have real coordinates, visPropCalc.visible is set to false. Additionally, the user can control visibility with the attribute "visible", even by supplying a functions as value.
Default Value:
empty object
Method Detail
<private> _set(key, value)
Sets the value of attribute key to value.
Parameters:
{String} key
The attribute's name.
value
The new value

addChild(obj)
Add an element as a child to the current element. Can be used to model dependencies between geometry elements.
Parameters:
{JXG.GeometryElement} obj
The dependent object.

<private> addDescendants(obj)
Parameters:
{JXG.GeometryElement} obj
The element that is to be added to the descendants list.
Returns:
this

<static> JXG.GeometryElement.addEvent()

{JXG.Object} addParents(parents)
Adds ids of elements to the array this.parents. This method needs to be called if some dependencies can not be detected automatically by JSXGraph. For example if a function graph is given by a function which refers to coordinates of a point, calling addParents() is necessary.
Parameters:
{Array} parents
Array of elements or ids of elements. Alternatively, one can give a list of objects as parameters.
Returns:
{JXG.Object} reference to the object itself.
Examples:
// Movable function graph
var A = board.create('point', [1, 0], {name:'A'}),
    B = board.create('point', [3, 1], {name:'B'}),
    f = board.create('functiongraph', function(x) {
         var ax = A.X(),
             ay = A.Y(),
             bx = B.X(),
             by = B.Y(),
             a = (by - ay) / ( (bx - ax) * (bx - ax) );
          return a * (x - ax) * (x - ax) + ay;
     }, {fixed: false});
f.addParents([A, B]);

					
					

<private> {JXG.Object} addParentsFromJCFunctions(function_array)
Add dependence on elements in JessieCode functions.
Parameters:
{Array} function_array
Array of functions containing potential properties "deps" with elements the function depends on.
Returns:
{JXG.Object} reference to the object itself

addRotation(angle)
Rotate texts or images by a given degree.
Parameters:
{number} angle
The degree of the rotation (90 means vertical text).
See:
JXG.GeometryElement#rotate

{String} addTicks(ticks)
Adds ticks to this line or curve. Ticks can be added to a curve or any kind of line: line, arrow, and axis.
Parameters:
{JXG.Ticks} ticks
Reference to a ticks object which is describing the ticks (color, distance, how many, etc.).
Returns:
{String} Id of the ticks object.

{JXG.GeometryElement} addTransform(transform)
Add transformations to this element.
Parameters:
{JXG.Transformation|Array} transform
Either one JXG.Transformation or an array of JXG.Transformations.
Returns:
{JXG.GeometryElement} Reference to the element.

{JXG.GeometryElement} animate(hash, time, options)
Animates properties for that object like stroke or fill color, opacity and maybe even more later.
Parameters:
{Object} hash
Object containing properties with target values for the animation.
{number} time
Number of milliseconds to complete the animation.
{Object} options Optional
Optional settings for the animation:
  • callback: A function that is called as soon as the animation is finished.
Returns:
{JXG.GeometryElement} A reference to the object

{Array, Array} bounds()
Dimensions of the smallest rectangle enclosing the element.
Returns:
{Array} The coordinates of the enclosing rectangle in a format like the bounding box in JXG.Board#setBoundingBox.
{Array} similar to JXG.Board#setBoundingBox.

clearTrace()
Removes all objects generated by the trace function.

{JXG.GeometryElement} cloneToBackground()
Copy the element to background. This is used for tracing elements.
Returns:
{JXG.GeometryElement} A reference to the element

<private> {number} countChildren()
Counts the direct children of an object without counting labels.
Returns:
{number} Number of children

<private> createGradient()
Creates a gradient nodes in the renderer.
See:
JXG.SVGRenderer#setGradient

createLabel()
Creates a label element for this geometry element.
See:
#addLabelToElement

<private> {boolean} draggable()
Decides whether an element can be dragged. This is used in JXG.GeometryElement#setPositionDirectly methods where all parent elements are checked if they may be dragged, too.
Returns:
{boolean}

{String|Number} formatNumberLocale(value, digits)
Format a number according to the locale set in the attribute "intl". If in the options of the intl-attribute "maximumFractionDigits" is not set, the optional parameter digits is used instead. See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/NumberFormat/NumberFormat for more information about internationalization.
Parameters:
{Number} value
Number to be formatted
{Number} digits Optional, Default: undefined
Optional number of digits
Returns:
{String|Number} string containing the formatted number according to the locale or the number itself of the formatting is not possible.

<private> {JXG.GeometryElement} fullUpdate(visible)
Run through the full update chain of an element.
Parameters:
{Boolean} visible
Set visibility in case the elements attribute value is 'inherit'. null is allowed.
Returns:
{JXG.GeometryElement} Reference to the element

{Array} generatePolynomial()
Array of strings containing the polynomials defining the element. Used for determining geometric loci the groebner way.
Returns:
{Array} An array containing polynomials describing the locus of the current object.

getAttribute(key)
Get the value of the property key.
Parameters:
{String} key
The name of the property you are looking for
Returns:
The value of the property

{Object} getAttributes()
Retrieve a copy of the current visProp.
Returns:
{Object}

{JXG.Coords} getLabelAnchor()
Returns the coords object where the label of the element shall be drawn. Differs in some cases from the values that getTextAnchor returns.
Returns:
{JXG.Coords} JXG.Coords Place where the text shall be drawn.
See:
JXG.GeometryElement#getTextAnchor

{String} getName()
Returns the elements name. Used in JessieCode.
Returns:
{String}

{Array} getParents()
List of the element ids resp. values used as parents in JXG.Board#create.
Returns:
{Array}

getProperty()
Deprecated alias for JXG.GeometryElement#getAttribute.
Deprecated:
Use JXG.GeometryElement#getAttribute.

<private> {Array} getSnapSizes()
Determine values of snapSizeX and snapSizeY. If the attributes snapSizex and snapSizeY are greater than zero, these values are taken. Otherwise, determine the distance between major ticks of the default axes.
Returns:
{Array} containing the snap sizes for x and y direction.

{JXG.Coords} getTextAnchor()
Returns the coords object where a text that is bound to the element shall be drawn. Differs in some cases from the values that getLabelAnchor returns.
Returns:
{JXG.Coords} JXG.Coords Place where the text shall be drawn.
See:
JXG.GeometryElement#getLabelAnchor

{String} getType()
The type of the element as used in JXG.Board#create.
Returns:
{String}

{JXG.GeometryElement} handleSnapToGrid(force, fromParent)
Move an element to its nearest grid point. The function uses the coords object of the element as its actual position. If there is no coords object or if the object is fixed, nothing is done.
Parameters:
{Boolean} force
force snapping independent from what the snaptogrid attribute says
{Boolean} fromParent
True if the drag comes from a child element. This is the case if a line through two points is dragged. In this case we do not try to force the points to stay inside of the visible board, but the distance between the two points stays constant.
Returns:
{JXG.GeometryElement} Reference to this element

{Boolean} hasPoint(x, y)
Checks whether (x,y) is near the element.
Parameters:
{Number} x
Coordinate in x direction, screen coordinates.
{Number} y
Coordinate in y direction, screen coordinates.
Returns:
{Boolean} True if (x,y) is near the element, False otherwise.

Hide the element. It will still exist but not be visible on the board. Alias for "element.setAttribute({visible: false});"
Returns:
{JXG.GeometryElement} Reference to the element

{JXG.GeometryElement} hideElement()
Hide the element. It will still exist but not be visible on the board. Alias for JXG.GeometryElement#hide
Returns:
{JXG.GeometryElement} Reference to the element

{JXG.Board} noHighlight()
Uses the "normal" properties of the element.
Returns:
{JXG.Board}

<private> normalize()
Normalize the element's standard form.

<private> prepareUpdate()
Notify all child elements for updates.

remove()
Removes the element from the construction. This only removes the SVG or VML node of the element and its label (if available) from the renderer, to remove the element completely you should use JXG.Board#removeObject.

removeAllTicks()
Removes all ticks from a line or curve.

{JXG.Object} removeChild(obj)
Remove an element as a child from the current element.
Parameters:
{JXG.GeometryElement} obj
The dependent object.
Returns:
{JXG.Object} reference to the object itself

<private> {JXG.Object} removeDescendants(obj)
Removes the given object from the descendants list of this object and all its child objects.
Parameters:
{JXG.GeometryElement} obj
The element that is to be removed from the descendants list.
Returns:
{JXG.Object} reference to the object itself

<static> JXG.GeometryElement.removeEvent()

removeTicks(tick)
Removes ticks identified by parameter named tick from this line or curve.
Parameters:
{JXG.Ticks} tick
Reference to tick object to remove.

<private> {Object} resolveShortcuts(attributes)
Resolves attribute shortcuts like color and expands them, e.g. strokeColor and fillColor. Writes the expanded attributes back to the given attributes.
Parameters:
{Object} attributes
object
Returns:
{Object} The given attributes object with shortcuts expanded.

setArrow(firstArrow, lastArrow)
Determines whether the element has arrows at start or end of the arc. If it is set to be a "typical" vector, ie lastArrow == true, then the element.type is set to VECTOR.
Parameters:
{Boolean} firstArrow
True if there is an arrow at the start of the arc, false otherwise.
{Boolean} lastArrow
True if there is an arrow at the end of the arc, false otherwise.

{JXG.GeometryElement} setAttribute(attributes)
Sets an arbitrary number of attributes. This method has one or more parameters of the following types:
  • object: {key1:value1,key2:value2,...}
  • string: 'key:value'
  • array: ['key', value]
Parameters:
{Object} attributes
An object with attributes.
Returns:
{JXG.GeometryElement} A reference to the element.
Examples:
// Set attribute directly on creation of an element using the attributes object parameter
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-1, 5, 5, 1]};
var p = board.create('point', [2, 2], {visible: false});

// Now make this point visible and fixed:
p.setAttribute({
    fixed: true,
    visible: true
});

<private> setDash(dash)
Set the dash style of an object. See JXG.GeometryElement#dash for a list of available dash styles. You should use JXG.GeometryElement#setAttribute instead of this method.
Parameters:
{number} dash
Indicates the new dash style

<private> {JXG.GeometryElement} setDisplayRendNode(val)
Show the element or hide it. If hidden, it will still exist but not be visible on the board.

Sets also the display of the inherits elements. These can be JSXGraph elements or arrays of JSXGraph elements. However, deeper nesting than this is not supported.

Parameters:
{Boolean} val
true: show the element, false: hide the element
Returns:
{JXG.GeometryElement} Reference to the element

setLabel(str)
Sets a label and its text If label doesn't exist, it creates one
Parameters:
{String} str

setLabelText(str)
Updates the element's label text, strips all html.
Parameters:
{String} str

setName(str)
Updates the element's label text and the element's attribute "name", strips all html.
Parameters:
{String} str

{JXG.Object} setParents(parents)
Sets ids of elements to the array this.parents. First, this.parents is cleared. See JXG.GeometryElement#addParents.
Parameters:
{Array} parents
Array of elements or ids of elements. Alternatively, one can give a list of objects as parameters.
Returns:
{JXG.Object} reference to the object itself.

{JXG.GeometryElement} setPosition(method, coords)
Translates the object by (x, y). In case the element is defined by points, the defining points are translated, e.g. a circle constructed by a center point and a point on the circle line.
Parameters:
{Number} method
The type of coordinates used here. Possible values are JXG.COORDS_BY_USER and JXG.COORDS_BY_SCREEN.
{Array} coords
array of translation vector.
Returns:
{JXG.GeometryElement} Reference to the element object.
See:
JXG.GeometryElement3D#setPosition2D

{JXG.GeometryElement} setPositionDirectly(method, coords, oldcoords)
Moves an element by the difference of two coordinates.
Parameters:
{Number} method
The type of coordinates used here. Possible values are JXG.COORDS_BY_USER and JXG.COORDS_BY_SCREEN.
{Array} coords
coordinates in screen/user units
{Array} oldcoords
previous coordinates in screen/user units
Returns:
{JXG.GeometryElement} this element

setProperty()
Deprecated alias for JXG.GeometryElement#setAttribute.
Deprecated:
Use JXG.GeometryElement#setAttribute.

Make the element visible. Alias for "element.setAttribute({visible: true});"
Returns:
{JXG.GeometryElement} Reference to the element

{JXG.GeometryElement} showElement()
Make the element visible. Alias for JXG.GeometryElement#show
Returns:
{JXG.GeometryElement} Reference to the element

<private> {JXG.GeometryElement} snapToPoints()
Snaps the element to points. Only works for points. Points will snap to the next point as defined in their properties JXG.Point#attractorDistance and JXG.Point#attractorUnit. Lines and circles will snap their parent points to points.
Returns:
{JXG.GeometryElement} Reference to the element.

{JXG.GeometryElement} update()
General update method. Should be overwritten by the element itself. Can be used sometimes to commit changes to the object.
Returns:
{JXG.GeometryElement} Reference to the element

<private> {JXG.GeometryElement} updateRenderer()
Provide updateRenderer method.
Returns:
{JXG.GeometryElement} Reference to the element

<private> {JXG.GeometryElement} updateVisibility(parent_val)
Set the visibility of an element. The visibility is influenced by (listed in ascending priority):
  1. The value of the element's attribute 'visible'
  2. The visibility of a parent element. (Example: label) This overrules the value of the element's attribute value only if this attribute value of the element is 'inherit'.
  3. being inside of the canvas

This method is called three times for most elements:

  1. between JXG.GeometryElement#update and JXG.GeometryElement#updateRenderer. In case the value is 'inherit', nothing is done.
  2. Recursively, called by itself for child elements. Here, 'inherit' is overruled by the parent's value.
  3. In JXG.GeometryElement#updateRenderer, if the element is outside of the canvas.
Parameters:
{Boolean} parent_val
Visibility of the parent element.
Returns:
{JXG.GeometryElement} Reference to the element.

{Boolean} useLocale()
Checks if locale is enabled in the attribute. This may be in the attributes of the board, or in the attributes of the text. The latter has higher priority. The board attribute is taken if attribute "intl.enabled" of the text element is set to 'inherit'.
Returns:
{Boolean} if locale can be used for number formatting.
Event Detail
attribute(o, el)
Notify every time an attribute is changed.
Parameters:
{Object} o
A list of changed attributes and their new value.
{Object} el
Reference to the element

attribute:key(val, nval, el)
This is a generic event handler. It exists for every possible attribute that can be set for any element, e.g. if you want to be notified everytime an element's strokecolor is changed, is the event attribute:strokecolor.
Parameters:
val
The old value.
nval
The new value
{Object} el
Reference to the element

down(e)
Whenever the user starts to touch or click an element.
Parameters:
{Event} e
The browser's event object.

drag(e)
This event is fired whenever the user drags an element.
Parameters:
{Event} e
The browser's event object.

keydrag(e)
This event is fired whenever the user drags the element by pressing arrow keys on the keyboard.
Parameters:
{Event} e
The browser's event object.

mousedown(e)
Whenever the user starts to click an element.
Parameters:
{Event} e
The browser's event object.

mousedrag(e)
This event is fired whenever the user drags the element with a mouse.
Parameters:
{Event} e
The browser's event object.

mousemove(e)
This event is fired whenever the user is moving the mouse over an element.
Parameters:
{Event} e
The browser's event object.

mouseout(e)
This event is fired whenever the user puts the mouse away from an element.
Parameters:
{Event} e
The browser's event object.

mouseover(e)
This event is fired whenever the user puts the mouse over an element.
Parameters:
{Event} e
The browser's event object.

mouseup(e)
Whenever the user releases the mousebutton over an element.
Parameters:
{Event} e
The browser's event object.

move(e)
This event is fired whenever the user is moving over an element.
Parameters:
{Event} e
The browser's event object.

out(e)
This event is fired whenever the user is leaving an element.
Parameters:
{Event} e
The browser's event object.

over(e)
This event is fired whenever the user is hovering over an element.
Parameters:
{Event} e
The browser's event object.

pendown(e)
Whenever the user taps an element with the pen.
Parameters:
{Event} e
The browser's event object.

pendrag(e)
This event is fired whenever the user drags the element with a pen.
Parameters:
{Event} e
The browser's event object.

penup(e)
Whenever the user lifts the pen over an element.
Parameters:
{Event} e
The browser's event object.

touchdown(e)
Whenever the user starts to touch an element.
Parameters:
{Event} e
The browser's event object.

touchdrag(e)
This event is fired whenever the user drags the element on a touch device.
Parameters:
{Event} e
The browser's event object.

touchup(e)
Whenever the user stops touching an element.
Parameters:
{Event} e
The browser's event object.

up(e)
Whenever the user stops to touch or click an element.
Parameters:
{Event} e
The browser's event object.

Documentation generated by JsDoc Toolkit 2.4.0 on Wed Oct 02 2024 09:14:35 GMT+0200 (Mitteleuropäische Sommerzeit)