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Information Foreword What is EJS? Demos/Examples Credits Links Webcasts Installation Download & Install EJS Workspaces Running EJS Conditions of Use Documentation EJS Console EJS Interface Description Panel Model Panel View Panel Deployment Elements Reference User Feedback English | Spanish | ? View Edit History Print PDF ## Arrow (old) 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
Arrow
Position and Size
Name | Description | Values accepted | Default
X | The X coordinate for the element. | A constant or variable of type double or int. |
Y | The Y coordinate for the element. | A constant or variable of type double or int. |
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. |
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. |
Draggable | Whether the element can be moved. | 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. |
Sensitivity | The size of the hot spot (in pixels). | A constant or variable of type int, 0 makes the full particle the hot spot. |
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

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Page last modified on June 09, 2009, at 06:37 PM