## Button class

The Button class is a graphical object able to launch an action when clicked or designated by the mouse.

### Creation

There are no constructors for this class. Buttons are created with the addButton, the addButtonImage and the addButtons methods of DFrame, Bar or BarLayer classes:

var button = dFrame.addButton(parameters): Instantiate a Button on a DFrame

var button = bar.addButton(parameters): Instantiate a Button on a Bar.

var button = barLayer.addButton(parameters): Instantiate a Button on a BarLayer

Note: var menu = xxxx.addMenu also instantiate a button if it is a pop-menu. A handle on this Button can be obtained with the Menu.getButton method.