AppearanceControl (Swing UI classes for OTS 1.6.0 API)

All Known Implementing Classes:

OTSControlPanel.ClockLabel, OTSControlPanel.TimeEdit, OTSSimulationPanel.AppearanceControlTabbedContentPane
```
public interface AppearanceControl
```
This interface allows on screen items to not obtain colors and/or the font from an Appearance. This can be useful for items where considering only a background and a foreground color is not sufficient, possibly creating unreadable or otherwise unpleasant on screen items.

The default implementation of the methods in this interface return false, meaning the Appearance is completely ignored. In order to ignore it only partially, some methods should be overridden to return true. An example of this is given below, which will only allow the font of the Appearance. It also shows a convenient way to implement this interface when using default on screen items using a local class.
```
 class AppearanceControlComboBox<T> extends JComboBox<T> implements AppearanceControl
 {
     public boolean isFont()
     {
         return true;
     }
 }
 
 JComboBox<String> comboBox = new AppearanceControlComboBox<>();
 
```
Copyright (c) 2013-2022 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.
Version:

$Revision$, $LastChangedDate$, by $Author$, initial version 6 feb. 2018

Author:

Alexander Verbraeck, Peter Knoppers, Wouter Schakel

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default boolean`	`isBackground()`	Returns whether this item has a controllable background.
`default boolean`	`isFont()`	Returns whether this item has a controllable font.
`default boolean`	`isForeground()`	Returns whether this item has a controllable foreground.

- Method Detail
  - isBackground
```
default boolean isBackground()
```
    Returns whether this item has a controllable background.
    
    Returns:
    
    whether this item has a controllable background
  - isForeground
```
default boolean isForeground()
```
    Returns whether this item has a controllable foreground.
    
    Returns:
    
    whether this item has a controllable foreground
  - isFont
```
default boolean isFont()
```
    Returns whether this item has a controllable font.
    
    Returns:
    
    whether this item has a controllable font