llvm-gcc-4.2/libjava/classpath/javax/swing/plaf/metal/MetalButtonUI.java - llvm-archive - Git at Google

 /* MetalButtonUI.java
    Copyright (C) 2005 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
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 GNU Classpath is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with GNU Classpath; see the file COPYING.  If not, write to the
 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 02110-1301 USA.

 Linking this library statically or dynamically with other modules is
 making a combined work based on this library.  Thus, the terms and
 conditions of the GNU General Public License cover the whole
 combination.

 As a special exception, the copyright holders of this library give you
 permission to link this library with independent modules to produce an
 executable, regardless of the license terms of these independent
 modules, and to copy and distribute the resulting executable under
 terms of your choice, provided that you also meet, for each linked
 independent module, the terms and conditions of the license of that
 module.  An independent module is a module which is not derived from
 or based on this library.  If you modify this library, you may extend
 this exception to your version of the library, but you are not
 obligated to do so.  If you do not wish to do so, delete this
 exception statement from your version. */


 package javax.swing.plaf.metal;

 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Font;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Rectangle;

 import javax.swing.AbstractButton;
 import javax.swing.ButtonModel;
 import javax.swing.JButton;
 import javax.swing.JComponent;
 import javax.swing.JToolBar;
 import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicButtonListener;
 import javax.swing.plaf.basic.BasicButtonUI;

 /**
  * A UI delegate for the {@link JButton} component.
  *
  * @author Roman Kennke (roman@kennke.org)
  */
 public class MetalButtonUI
   extends BasicButtonUI
 {

   /** The color used to draw the focus rectangle around the text and/or icon. */
   protected Color focusColor;

   /** The background color for the button when it is pressed. */
   protected Color selectColor;

   /** The color for disabled button labels. */
   protected Color disabledTextColor;

   /**
    * Creates a new instance.
    */
   public MetalButtonUI()
   {
     super();
     focusColor = UIManager.getColor(getPropertyPrefix() + "focus");
     selectColor = UIManager.getColor(getPropertyPrefix() + "select");
     disabledTextColor = UIManager.getColor(getPropertyPrefix() + "disabledText");
   }

   /**
    * Returns the color for the focus border.
    *
    * @return the color for the focus border
    */
   protected Color getFocusColor()
   {
     return focusColor;
   }

   /**
    * Returns the color that indicates a selected button.
    *
    * @return the color that indicates a selected button
    */
   protected Color getSelectColor()
   {
     return selectColor;
   }

   /**
    * Returns the color for the text label of disabled buttons.
    *
    * @return the color for the text label of disabled buttons
    */
   protected Color getDisabledTextColor()
   {
     return disabledTextColor;
   }

   /**
    * Returns a UI delegate for the specified component.
    *
    * @param c  the component (should be a subclass of {@link AbstractButton}).
    *
    * @return A new instance of <code>MetalButtonUI</code>.
    */
   public static ComponentUI createUI(JComponent c)
   {
     return new MetalButtonUI();
   }

   /**
    * Installs the default settings for the specified button.
    *
    * @param button  the button.
    *
    * @see #uninstallDefaults(AbstractButton)
    */
   public void installDefaults(AbstractButton button)
   {
     super.installDefaults(button);
     button.setRolloverEnabled(UIManager.getBoolean(
                                             getPropertyPrefix() + "rollover"));
   }

   /**
    * Removes the defaults added by {@link #installDefaults(AbstractButton)}.
    */
   public void uninstallDefaults(AbstractButton button)
   {
     super.uninstallDefaults(button);
     button.setRolloverEnabled(false);
   }

   /**
    * Returns a button listener for the specified button.
    *
    * @param button  the button.
    *
    * @return A button listener.
    */
   protected BasicButtonListener createButtonListener(AbstractButton button)
   {
     return new MetalButtonListener(button);
   }

   /**
    * Paints the background of the button to indicate that it is in the
    * "pressed" state.
    *
    * @param g  the graphics context.
    * @param b  the button.
    */
   protected void paintButtonPressed(Graphics g, AbstractButton b)
   {
     if (b.isContentAreaFilled())
     {
       Rectangle area = b.getVisibleRect();
       g.setColor(selectColor);
       g.fillRect(area.x, area.y, area.width, area.height);
     }
   }

   /**
    * Paints the focus rectangle around the button text and/or icon.
    *
    * @param g  the graphics context.
    * @param b  the button.
    * @param viewRect  the button bounds.
    * @param textRect  the text bounds.
    * @param iconRect  the icon bounds.
    */
   protected void paintFocus(Graphics g, AbstractButton b, Rectangle viewRect,
           Rectangle textRect, Rectangle iconRect)
   {
     if (b.isEnabled() && b.hasFocus() && b.isFocusPainted())
     {
       Color savedColor = g.getColor();
       g.setColor(getFocusColor());
       Rectangle focusRect = iconRect.union(textRect);
       g.drawRect(focusRect.x - 1, focusRect.y,
                  focusRect.width + 1, focusRect.height);
       g.setColor(savedColor);
     }
   }

   /**
    * Paints the button text.
    *
    * @param g  the graphics context.
    * @param c  the button.
    * @param textRect  the text bounds.
    * @param text  the text to display.
    */
   protected void paintText(Graphics g, JComponent c, Rectangle textRect,
           String text)
   {
     AbstractButton b = (AbstractButton) c;
     Font f = b.getFont();
     g.setFont(f);
     FontMetrics fm = g.getFontMetrics(f);

     if (b.isEnabled())
       {
         g.setColor(b.getForeground());
         g.drawString(text, textRect.x, textRect.y + fm.getAscent());
       }
     else
       {
         g.setColor(getDisabledTextColor());
         g.drawString(text, textRect.x, textRect.y + fm.getAscent());
       }
   }

   /**
    * If the property <code>Button.gradient</code> is set, then a gradient is
    * painted as background, otherwise the normal superclass behaviour is
    * called.
    */
   public void update(Graphics g, JComponent c)
   {
     AbstractButton b = (AbstractButton) c;
     if ((b.getBackground() instanceof UIResource)
         && b.isContentAreaFilled() && b.isEnabled())
       {
         ButtonModel m = b.getModel();
         String uiKey = "Button.gradient";
         if (! isToolbarButton(b))
           {
             if (! m.isArmed() && ! m.isPressed() && isDrawingGradient(uiKey))
               {
                 MetalUtils.paintGradient(g, 0, 0, b.getWidth(), b.getHeight(),
                                          SwingConstants.VERTICAL,
                                          uiKey);
                 paint(g, c);
                 return;
               }
           }
         else if (m.isRollover() && isDrawingGradient(uiKey))
           {
             MetalUtils.paintGradient(g, 0, 0, b.getWidth(), b.getHeight(),
                                      SwingConstants.VERTICAL,
                                      uiKey);
             paint(g, c);
             return;
           }
       }
     // Fallback if we didn't have any of the two above cases.
     super.update(g, c);
   }

   /**
    * Returns <code>true</code> when the button is a toolbar button,
    * <code>false</code> otherwise.
    *
    * @param b the button component to test
    *
    * @return <code>true</code> when the button is a toolbar button,
    *         <code>false</code> otherwise
    */
   private boolean isToolbarButton(Component b)
   {
     Component parent = b.getParent();
     return parent instanceof JToolBar;
   }

   /**
    * Returns <code>true</code> if we should draw the button gradient,
    * <code>false</code> otherwise.
    *
    * @param uiKey the UIManager key for the gradient
    *
    * @return <code>true</code> if we should draw the button gradient,
    *         <code>false</code> otherwise
    */
   private boolean isDrawingGradient(String uiKey)
   {
     return (UIManager.get(uiKey) != null);
   }
 }
	/* MetalButtonUI.java
	Copyright (C) 2005 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
	the Free Software Foundation; either version 2, or (at your option)
	any later version.

	GNU Classpath is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with GNU Classpath; see the file COPYING. If not, write to the
	Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	02110-1301 USA.

	Linking this library statically or dynamically with other modules is
	making a combined work based on this library. Thus, the terms and
	conditions of the GNU General Public License cover the whole
	combination.

	As a special exception, the copyright holders of this library give you
	permission to link this library with independent modules to produce an
	executable, regardless of the license terms of these independent
	modules, and to copy and distribute the resulting executable under
	terms of your choice, provided that you also meet, for each linked
	independent module, the terms and conditions of the license of that
	module. An independent module is a module which is not derived from
	or based on this library. If you modify this library, you may extend
	this exception to your version of the library, but you are not
	obligated to do so. If you do not wish to do so, delete this
	exception statement from your version. */


	package javax.swing.plaf.metal;

	import java.awt.Color;
	import java.awt.Component;
	import java.awt.Font;
	import java.awt.FontMetrics;
	import java.awt.Graphics;
	import java.awt.Rectangle;

	import javax.swing.AbstractButton;
	import javax.swing.ButtonModel;
	import javax.swing.JButton;
	import javax.swing.JComponent;
	import javax.swing.JToolBar;
	import javax.swing.SwingConstants;
	import javax.swing.UIManager;
	import javax.swing.plaf.ComponentUI;
	import javax.swing.plaf.UIResource;
	import javax.swing.plaf.basic.BasicButtonListener;
	import javax.swing.plaf.basic.BasicButtonUI;

	/**
	* A UI delegate for the {@link JButton} component.
	*
	* @author Roman Kennke (roman@kennke.org)
	*/
	public class MetalButtonUI
	extends BasicButtonUI
	{

	/** The color used to draw the focus rectangle around the text and/or icon. */
	protected Color focusColor;

	/** The background color for the button when it is pressed. */
	protected Color selectColor;

	/** The color for disabled button labels. */
	protected Color disabledTextColor;

	/**
	* Creates a new instance.
	*/
	public MetalButtonUI()
	{
	super();
	focusColor = UIManager.getColor(getPropertyPrefix() + "focus");
	selectColor = UIManager.getColor(getPropertyPrefix() + "select");
	disabledTextColor = UIManager.getColor(getPropertyPrefix() + "disabledText");
	}

	/**
	* Returns the color for the focus border.
	*
	* @return the color for the focus border
	*/
	protected Color getFocusColor()
	{
	return focusColor;
	}

	/**
	* Returns the color that indicates a selected button.
	*
	* @return the color that indicates a selected button
	*/
	protected Color getSelectColor()
	{
	return selectColor;
	}

	/**
	* Returns the color for the text label of disabled buttons.
	*
	* @return the color for the text label of disabled buttons
	*/
	protected Color getDisabledTextColor()
	{
	return disabledTextColor;
	}

	/**
	* Returns a UI delegate for the specified component.
	*
	* @param c the component (should be a subclass of {@link AbstractButton}).
	*
	* @return A new instance of <code>MetalButtonUI</code>.
	*/
	public static ComponentUI createUI(JComponent c)
	{
	return new MetalButtonUI();
	}

	/**
	* Installs the default settings for the specified button.
	*
	* @param button the button.
	*
	* @see #uninstallDefaults(AbstractButton)
	*/
	public void installDefaults(AbstractButton button)
	{
	super.installDefaults(button);
	button.setRolloverEnabled(UIManager.getBoolean(
	getPropertyPrefix() + "rollover"));
	}

	/**
	* Removes the defaults added by {@link #installDefaults(AbstractButton)}.
	*/
	public void uninstallDefaults(AbstractButton button)
	{
	super.uninstallDefaults(button);
	button.setRolloverEnabled(false);
	}

	/**
	* Returns a button listener for the specified button.
	*
	* @param button the button.
	*
	* @return A button listener.
	*/
	protected BasicButtonListener createButtonListener(AbstractButton button)
	{
	return new MetalButtonListener(button);
	}

	/**
	* Paints the background of the button to indicate that it is in the
	* "pressed" state.
	*
	* @param g the graphics context.
	* @param b the button.
	*/
	protected void paintButtonPressed(Graphics g, AbstractButton b)
	{
	if (b.isContentAreaFilled())
	{
	Rectangle area = b.getVisibleRect();
	g.setColor(selectColor);
	g.fillRect(area.x, area.y, area.width, area.height);
	}
	}

	/**
	* Paints the focus rectangle around the button text and/or icon.
	*
	* @param g the graphics context.
	* @param b the button.
	* @param viewRect the button bounds.
	* @param textRect the text bounds.
	* @param iconRect the icon bounds.
	*/
	protected void paintFocus(Graphics g, AbstractButton b, Rectangle viewRect,
	Rectangle textRect, Rectangle iconRect)
	{
	if (b.isEnabled() && b.hasFocus() && b.isFocusPainted())
	{
	Color savedColor = g.getColor();
	g.setColor(getFocusColor());
	Rectangle focusRect = iconRect.union(textRect);
	g.drawRect(focusRect.x - 1, focusRect.y,
	focusRect.width + 1, focusRect.height);
	g.setColor(savedColor);
	}
	}

	/**
	* Paints the button text.
	*
	* @param g the graphics context.
	* @param c the button.
	* @param textRect the text bounds.
	* @param text the text to display.
	*/
	protected void paintText(Graphics g, JComponent c, Rectangle textRect,
	String text)
	{
	AbstractButton b = (AbstractButton) c;
	Font f = b.getFont();
	g.setFont(f);
	FontMetrics fm = g.getFontMetrics(f);

	if (b.isEnabled())
	{
	g.setColor(b.getForeground());
	g.drawString(text, textRect.x, textRect.y + fm.getAscent());
	}
	else
	{
	g.setColor(getDisabledTextColor());
	g.drawString(text, textRect.x, textRect.y + fm.getAscent());
	}
	}

	/**
	* If the property <code>Button.gradient</code> is set, then a gradient is
	* painted as background, otherwise the normal superclass behaviour is
	* called.
	*/
	public void update(Graphics g, JComponent c)
	{
	AbstractButton b = (AbstractButton) c;
	if ((b.getBackground() instanceof UIResource)
	&& b.isContentAreaFilled() && b.isEnabled())
	{
	ButtonModel m = b.getModel();
	String uiKey = "Button.gradient";
	if (! isToolbarButton(b))
	{
	if (! m.isArmed() && ! m.isPressed() && isDrawingGradient(uiKey))
	{
	MetalUtils.paintGradient(g, 0, 0, b.getWidth(), b.getHeight(),
	SwingConstants.VERTICAL,
	uiKey);
	paint(g, c);
	return;
	}
	}
	else if (m.isRollover() && isDrawingGradient(uiKey))
	{
	MetalUtils.paintGradient(g, 0, 0, b.getWidth(), b.getHeight(),
	SwingConstants.VERTICAL,
	uiKey);
	paint(g, c);
	return;
	}
	}
	// Fallback if we didn't have any of the two above cases.
	super.update(g, c);
	}

	/**
	* Returns <code>true</code> when the button is a toolbar button,
	* <code>false</code> otherwise.
	*
	* @param b the button component to test
	*
	* @return <code>true</code> when the button is a toolbar button,
	* <code>false</code> otherwise
	*/
	private boolean isToolbarButton(Component b)
	{
	Component parent = b.getParent();
	return parent instanceof JToolBar;
	}

	/**
	* Returns <code>true</code> if we should draw the button gradient,
	* <code>false</code> otherwise.
	*
	* @param uiKey the UIManager key for the gradient
	*
	* @return <code>true</code> if we should draw the button gradient,
	* <code>false</code> otherwise
	*/
	private boolean isDrawingGradient(String uiKey)
	{
	return (UIManager.get(uiKey) != null);
	}
	}