Easy Java Simulations Wiki | Main / ElementsArrow

 An interactive arrow or segment.

An arrow is a 2D and 3D drawing element that displays a simple geometrical vector at given coordinates of the parent drawing or plotting panel. There is a version for 2D canvas and another one for a 3D space. The properties here shown are for the 2D model, though they are similar in 3D.

Object wrapped

The object wrapped by this element is of the class org.opensourcephysics.displayejs.Arrow. The class has been designed to control all of its features through properties, so there is no need to use directly any of the object methods.

Useful methods

(This list deliberately left empty.)

Properties

Position and Size
Name	Description	Values accepted	Default
Pos X	The X coordinate for the element.	A constant or variable of type double or int.
Pos Y	The Y coordinate for the element.	A constant or variable of type double or int.
Position Array	The array with the coordinates of the element.	A double array.
Size X	The size of the element in the X direction.	A constant or variable of type double or int.
Size Y	The size of the element in the Y direction.	A constant or variable of type double or int.
Size Array	The array with the size of the element in each coordinate.	A double array.
Scale X	The scale factor for the element in the X direction.	A constant or variable of type double or int.
Scale Y	The scale factor for the element in the Y direction.	A constant or variable of type double or int.
Visibility and Interaction
Name	Description	Values accepted	Default
Visible	The visibility of the element.	A boolean variable or one of the constants true or false.
Measured	Whether the element affects its parent panel’s autoscaling.	A boolean variable or one of the constants true or false.
Draggable	Whether the element can be dragged.	A boolean variable or one of the constants true or false.
Resizable	Whether the element can be resized.	A boolean variable or one of the constants true or false.
On Press	The action to invoke when the element is pressed.	The Java code to invoke for the action.
On Drag	The action to invoke when the element is dragged.	The Java code to invoke for the action.
On Release	The action to invoke when the element is released.	The Java code to invoke for the action.
On Enter	The action to invoke when the mouse enters the element.	The Java code to invoke for the action.
On Exit	The action to invoke when the mouse leaves the element.	The Java code to invoke for the action.
Graphical Aspect
Name	Description	Values accepted	Default
Style	The drawing style for the element.	Use the editor provided or read about particle styles.
Line Color	The color used for the lines of the element.	Use the editor provided or read about colors.
Fill Color	The color used to fill the element.	Use the editor provided or read about colors. The special value null draws a hollow element.
Stroke	The thickness and line style for the lines of the element.	A constant or variable of type double or int indicates the thickness. For more sophisticated strokes, read about strokes.	1