Class BasicLabelUI

protected static BasicLabelUI labelUI

public static ComponentUI createUI(JComponent c)

Returns an instance of the UI delegate for the specified component. Each subclass must provide its own static createUI method that returns an instance of that UI delegate subclass. If the UI delegate subclass is stateless, it may return an instance that is shared by multiple components. If the UI delegate is stateful, then it should return a new instance per component. The default implementation of this method throws an error, as it should never be invoked.

Overrides:

createUI in interface ComponentUI

public Dimension getMaximumSize(JComponent c)

Overrides:

getMaximumSize in interface ComponentUI

Returns:

getPreferredSize(c)

public Dimension getMinimumSize(JComponent c)

Overrides:

getMinimumSize in interface ComponentUI

Returns:

getPreferredSize(c)

public Dimension getPreferredSize(JComponent c)

Returns the specified component's preferred size appropriate for the look and feel. If null is returned, the preferred size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method returns null.

Overrides:

getPreferredSize in interface ComponentUI

Parameters:

c - the component whose preferred size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

See Also:

JComponent.getPreferredSize(), LayoutManager.preferredLayoutSize(Container)

protected void installComponents(JLabel c)

protected void installDefaults(JLabel c)

protected void installKeyboardActions(JLabel l)

protected void installListeners(JLabel c)

public void installUI(JComponent c)

Configures the specified component appropriate for the look and feel. This method is invoked when the ComponentUI instance is being installed as the UI delegate on the specified component. This method should completely configure the component for the look and feel, including the following:

1. Install any default property values for color, fonts, borders, icons, opacity, etc. on the component. Whenever possible, property values initialized by the client program should not be overridden.
2. Install a LayoutManager on the component if necessary.
3. Create/add any required sub-components to the component.
4. Create/install event listeners on the component.
5. Create/install a PropertyChangeListener on the component in order to detect and respond to component property changes appropriately.
6. Install keyboard UI (mnemonics, traversal, etc.) on the component.
7. Initialize any appropriate instance data.

Overrides:

installUI in interface ComponentUI

Parameters:

c - the component where this UI delegate is being installed

See Also:

ComponentUI.uninstallUI(JComponent), JComponent.setUI(ComponentUI), JComponent.updateUI()

protected String layoutCL(JLabel label,
                          FontMetrics fontMetrics,
                          String text,
                          Icon icon,
                          Rectangle viewR,
                          Rectangle iconR,
                          Rectangle textR)

Forwards the call to SwingUtilities.layoutCompoundLabel(). This method is here so that a subclass could do Label specific layout and to shorten the method name a little.

See Also:

SwingUtilities.layoutCompoundLabel

public void paint(Graphics g,
                  JComponent c)

Paint the label text in the foreground color, if the label is opaque then paint the entire background with the background color. The Label text is drawn by paintEnabledText() or paintDisabledText(). The locations of the label parts are computed by layoutCL.

Overrides:

paint in interface ComponentUI

See Also:

paintEnabledText(JLabel,Graphics,String,int,int), paintDisabledText(JLabel,Graphics,String,int,int), layoutCL(JLabel,FontMetrics,String,Icon,Rectangle,Rectangle,Rectangle)

protected void paintDisabledText(JLabel l,
                                 Graphics g,
                                 String s,
                                 int textX,
                                 int textY)

Paint clippedText at textX, textY with background.lighter() and then shifted down and to the right by one pixel with background.darker().

See Also:

paint(Graphics,JComponent), paintEnabledText(JLabel,Graphics,String,int,int)

protected void paintEnabledText(JLabel l,
                                Graphics g,
                                String s,
                                int textX,
                                int textY)

Paint clippedText at textX, textY with the labels foreground color.

See Also:

paint(Graphics,JComponent), paintDisabledText(JLabel,Graphics,String,int,int)

public void propertyChange(PropertyChangeEvent e)

This method gets called when a bound property is changed.

Specified by:

propertyChange in interface PropertyChangeListener

Parameters:

protected void uninstallComponents(JLabel c)

protected void uninstallDefaults(JLabel c)

protected void uninstallKeyboardActions(JLabel c)

protected void uninstallListeners(JLabel c)

public void uninstallUI(JComponent c)

Reverses configuration which was done on the specified component during installUI. This method is invoked when this UIComponent instance is being removed as the UI delegate for the specified component. This method should undo the configuration performed in installUI, being careful to leave the JComponent instance in a clean state (no extraneous listeners, look-and-feel-specific property objects, etc.). This should include the following:

1. Remove any UI-set borders from the component.
2. Remove any UI-set layout managers on the component.
3. Remove any UI-added sub-components from the component.
4. Remove any UI-added event/property listeners from the component.
5. Remove any UI-installed keyboard UI from the component.
6. Nullify any allocated instance data objects to allow for GC.

Overrides:

uninstallUI in interface ComponentUI

Parameters:

c - the component from which this UI delegate is being removed; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

See Also:

ComponentUI.installUI(JComponent), JComponent.updateUI()