ComponentUI JDK 1.6)

public boolean contains (JComponent c, int x, int y)

Returns true if the specified x,y location is contained within the look and feel's defined shape of the specified component.

Returns true if the specified x,y location is
contained within the look and feel's defined shape of the specified
component. x and y are defined to be relative
to the coordinate system of the specified component. Although
a component's bounds is constrained to a rectangle,
this method provides the means for defining a non-rectangular
shape within those bounds for the purpose of hit detection.
Parameters:
- c - the component where the x,y location is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
- x - the x coordinate of the point
- y - the y coordinate of the point
See Also: JComponent.contains(int, int), Component.contains(int, int),

publicstatic ComponentUI createUI (JComponent c)

Returns an instance of the UI delegate for the specified component.

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.

public Accessible getAccessibleChild (JComponent c, int i)

Returns the ith Accessible child of the object.

Returns the ith Accessible child of the object. UIs might need to override this if they present areas on the screen that can be viewed as components, but actual components are not used for presenting those areas.

Note: As of v1.3, it is recommended that developers call Component.AccessibleAWTComponent.getAccessibleChild() instead of this method.
Returns: the ith Accessible child of the object
Parameters:
- i - zero-based index of child
See Also: ComponentUI.getAccessibleChildrenCount(javax.swing.JComponent),

public int getAccessibleChildrenCount (JComponent c)

Returns the number of accessible children in the object.

Returns the number of accessible children in the object. If all
of the children of this object implement Accessible,
this
method should return the number of children of this object.
UIs might wish to override this if they present areas on the
screen that can be viewed as components, but actual components
are not used for presenting those areas.

Note: As of v1.3, it is recommended that developers call
Component.AccessibleAWTComponent.getAccessibleChildrenCount() instead
of this method.
Returns: the number of accessible children in the object
See Also: ComponentUI.getAccessibleChild(javax.swing.JComponent, int),

public int getBaseline (JComponent c, int width, int height)

Returns the baseline.

Returns the baseline. The baseline is measured from the top of the component. This method is primarily meant for LayoutManagers to align components along their baseline. A return value less than 0 indicates this component does not have a reasonable baseline and that LayoutManagers should not align this component on its baseline.

This method returns -1. Subclasses that have a meaningful baseline should override appropriately.
Returns: baseline or a value < 0 indicating there is no reasonable baseline
Parameters:
- c - JComponent baseline is being requested for
- width - the width to get the baseline for
- height - the height to get the baseline for
Throws:
- NullPointerException - if c is null
- IllegalArgumentException - if width or height is < 0
Since: 1.6
See Also: JComponent.getBaseline(int,int),

public BaselineResizeBehavior getBaselineResizeBehavior (JComponent c)

Returns an enum indicating how the baseline of he component changes as the size changes.

public Dimension getMaximumSize (JComponent c)

Returns the specified component's maximum size appropriate for the look and feel.

Returns the specified component's maximum size appropriate for
the look and feel. If null is returned, the maximum
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 invokes getPreferredSize and returns that value.
Returns: a Dimension object or null
Parameters:
- c - the component whose maximum 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.getMaximumSize(), LayoutManager2.maximumLayoutSize(java.awt.Container),

public Dimension getMinimumSize (JComponent c)

Returns the specified component's minimum size appropriate for the look and feel.

Returns the specified component's minimum size appropriate for
the look and feel. If null is returned, the minimum
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 invokes getPreferredSize and returns that value.
Returns: a Dimension object or null
Parameters:
- c - the component whose minimum 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.getMinimumSize(), LayoutManager.minimumLayoutSize(java.awt.Container), ComponentUI.getPreferredSize(javax.swing.JComponent),

public Dimension getPreferredSize (JComponent c)

Returns the specified component's preferred size appropriate for the look and feel.

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.
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(java.awt.Container),

public void installUI (JComponent c)

Configures the specified component appropriate for the look and feel.

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:

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.
Install a LayoutManager on the component if necessary.
Create/add any required sub-components to the component.
Create/install event listeners on the component.
Create/install a PropertyChangeListener on the component in order
to detect and respond to component property changes appropriately.
Install keyboard UI (mnemonics, traversal, etc.) on the component.
Initialize any appropriate instance data.

Parameters:
- c - the component where this UI delegate is being installed
See Also: ComponentUI.uninstallUI(javax.swing.JComponent), JComponent.setUI(javax.swing.plaf.ComponentUI), JComponent.updateUI(),

public void paint (Graphics g, JComponent c)

Paints the specified component appropriate for the look and feel.

Paints the specified component appropriate for the look and feel.
This method is invoked from the ComponentUI.update method when
the specified component is being painted. Subclasses should override
this method and use the specified Graphics object to
render the content of the component.
Parameters:
- g - the Graphics context in which to paint
- c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
See Also: ComponentUI.update(java.awt.Graphics, javax.swing.JComponent),

public void uninstallUI (JComponent c)

Reverses configuration which was done on the specified component during installUI.

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:

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

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(javax.swing.JComponent), JComponent.updateUI(),

public void update (Graphics g, JComponent c)

Notifies this UI delegate that it's time to paint the specified component.

Notifies this UI delegate that it's time to paint the specified
component. This method is invoked by JComponent
when the specified component is being painted.
By default this method will fill the specified component with
its background color (if its opaque property is
true) and then immediately call paint.
In general this method need not be overridden by subclasses;
all look-and-feel rendering code should reside in the paint
method.
Parameters:
- g - the Graphics context in which to paint
- c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
See Also: ComponentUI.paint(java.awt.Graphics, javax.swing.JComponent), JComponent.paintComponent(java.awt.Graphics),