LookAndFeel.java   [plain text]

/* LookAndFeel.java --
   Copyright (C) 2002, 2004  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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permission to link this library with independent modules to produce an
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package javax.swing;

import java.awt.Component;
import java.awt.Toolkit;

import javax.swing.text.JTextComponent;

public abstract class LookAndFeel
{
  /**
   * This method is called once by UIManager.setLookAndFeel to create
   * the look and feel specific defaults table.
   *
   * @return the UI defaults
   */
  public UIDefaults getDefaults()
  {
    return null;
  }

  public abstract String getDescription();

  public static Object getDesktopPropertyValue(String systemPropertyName, Object fallbackValue)
  {
    Object value = Toolkit.getDefaultToolkit().getDesktopProperty(systemPropertyName);
    return value != null ? value : fallbackValue;
  }
  
  public abstract String getID();

  public abstract String getName();

  /**
   * Returns true when the Look and Feel supports window decorations,
   * false others. This method returns always false and needs to be overwritten
   * when the derived Look and Feel supports this.
   *
   * @return false
   *
   * @since 1.4
   */
  public boolean getSupportsWindowDecorations()
  {
    return false;
  }
  
  /**
   * UIManager.setLookAndFeel calls this method before the first call
   * (and typically the only call) to getDefaults(). 
   */
  public void initialize()
  {
  }

  /**
   * Convenience method for installing a component's default Border object
   * on the specified component if either the border is currently null
   * or already an instance of UIResource. 
   */
  public static void installBorder(JComponent c, String defaultBorderName)
  {
  }

  /**
   * Convenience method for initializing a component's foreground and
   * background color properties with values from the current defaults table.
   */
  public static void installColors(JComponent c, String defaultBgName, String defaultFgName)
  {
  }

  /**
   * Convenience method for initializing a components foreground background
   * and font properties with values from the current defaults table. 
   */
  public static void installColorsAndFont(JComponent component,
					  String defaultBgName,
					  String defaultFgName,
					  String defaultFontName)
  {
  }

  public abstract boolean isNativeLookAndFeel();

  public abstract boolean isSupportedLookAndFeel();

  /**
   * Loads the bindings in keys into retMap. 
   */
  public static void loadKeyBindings(InputMap retMap, Object[] keys)
  {
  }

  /**
   * Creates a ComponentInputMap from keys. 
   */
  public static ComponentInputMap makeComponentInputMap(JComponent c,
							Object[] keys)
  {
    return null;
  }

  /**
   * Utility method that creates a UIDefaults.LazyValue that creates an
   * ImageIcon UIResource for the specified gifFile filename. 
   */
  public static Object makeIcon(Class baseClass, String gifFile)
  {
    return null;
  }

  /**
   * Creates a InputMap from keys. 
   */
  public static InputMap makeInputMap(Object[] keys)
  {
    return null;
  }

  /**
   * Convenience method for building lists of KeyBindings.  
   */
  public static JTextComponent.KeyBinding[] makeKeyBindings(Object[] keyBindingList)
  {
    return null;
  }

  /**
   * Invoked when the user attempts an invalid operation. The default implement
   * just beeps. Subclasses that wish to change this need to override this
   * method.
   *
   * @param component the component the error occured in
   */
  public void provideErrorFeedback(Component component)
  {
    Toolkit.getDefaultToolkit().beep();
  }

  /**
   * Returns a string that displays and identifies this object's properties.
   *
   * @return the string "LookAndFeel"
   */
  public String toString()
  {
    return "LookAndFeel";
  }

  /**
   * UIManager.setLookAndFeel calls this method just before we're replaced by
   * a new default look and feel. 
   */
  public void uninitialize()
  {
  }

  /**
   * Convenience method for un-installing a component's default border on the
   * specified component if the border is currently an instance of UIResource.
   */
  public static void uninstallBorder(JComponent c)
  {
  }
}