package org.opentrafficsim.swing.gui;
/**
* This interface allows on screen items to not obtain colors and/or the font from an {@code 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 {@code false}, meaning the {@code 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 {@code 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) 2013-2021 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
* @author Peter Knoppers
* @author Wouter Schakel
*/
public interface AppearanceControl
{
/**
* Returns whether this item has a controllable background.
* @return whether this item has a controllable background
*/
default boolean isBackground()
{
return false;
}
/**
* Returns whether this item has a controllable foreground.
* @return whether this item has a controllable foreground
*/
default boolean isForeground()
{
return false;
}
/**
* Returns whether this item has a controllable font.
* @return whether this item has a controllable font
*/
default boolean isFont()
{
return false;
}
}