jcontrol.ui.vole
Class Button

java.lang.Object
  jcontrol.ui.vole.Component
      jcontrol.ui.vole.Button

public class Button
extends Component

VOLE user interface labeled button. The application can cause some action to happen when the button is pushed.

(c) Copyright 2003-2005 DOMOLOGIC GmbH

Author:

Wolfgang Klingauf

Field Summary

Fields inherited from class jcontrol.ui.vole.Component

eventQueue, focusOwner, font, g, height, listener, parent, visible, width, x, y

Constructor Summary

Button(Object label, int x, int y, int width, int height)
Constructs a new button with text or an image.

Button(String label, int x, int y)
Constructs a new text-labeled button.

Method Summary

boolean	onKeyEvent(KeyEvent e) If a KeyEvent accurs, this method is called.
void	paint() Paint the button.
void	press() Press the button.
void	setActionListener(ActionListener listener) Add an ActionListener to the button.
void	setLabel(Object label) Change the button's label
void	validate() Compute this component's preferred size and assign internal values width and height.

Methods inherited from class jcontrol.ui.vole.Component

getBounds, getParent, isVisible, onActionEvent, remove, removeFocus, requestFocus, setBounds, setFont, setGraphics, setParent, setVisible, transferFocus

Methods inherited from class java.lang.Object

clone, equals, notifyAll, wait

Constructor Detail

Button

public Button(Object label,
              int x,
              int y,
              int width,
              int height)

Constructs a new button with text or an image.

Parameters:

label - the label to display on the button

x - the x-coordinate of the button's top-left corner

y - the y-coordinate of the button's top-left corner

width - the width of the button

height - the height of the button

Button

public Button(String label,
              int x,
              int y)

Constructs a new text-labeled button. The button's width and height orient on the text extents.

Parameters:

text - The text to display on the button.

x - the x-coordinate of the button's top-left corner

y - the y-coordinate of the button's top-left corner

Method Detail

onKeyEvent

public boolean onKeyEvent(KeyEvent e)

If a KeyEvent accurs, this method is called.

Overrides:

onKeyEvent in class Component

Parameters:

e - the KeyEvent.

Returns:

If this method returns true, the KeyEvent is handled by the super Container.

paint

public void paint()

Paint the button.

Overrides:

paint in class Component

press

public void press()

Press the button. An ActionEvent is fired.

setActionListener

public void setActionListener(ActionListener listener)

Add an ActionListener to the button. It will receive ActionEvents when the button is m_pressed.

Parameters:

listener - The new ActionListener or null.

setLabel

public void setLabel(Object label)

Change the button's label

Parameters:

label - the new label or null if the button has no m_label.

validate

public void validate()

Compute this component's preferred size and assign internal values width and height.

Overrides:

validate in class Component