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1 files changed, 298 insertions, 0 deletions

diff --git a/libjava/classpath/javax/swing/plaf/metal/MetalButtonUI.java b/libjava/classpath/javax/swing/plaf/metal/MetalButtonUI.java
new file mode 100644
index 000000000..974f0a85a
--- /dev/null
+++ b/libjava/classpath/javax/swing/plaf/metal/MetalButtonUI.java
@@ -0,0 +1,298 @@
+/* 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.BasicButtonUI;
+
+/**
+ * A UI delegate for the {@link JButton} component.
+ *
+ * @author Roman Kennke (roman@kennke.org)
+ */
+public class MetalButtonUI
+  extends BasicButtonUI
+{
+
+  /**
+   * The shared button UI.
+   */
+  private static MetalButtonUI sharedUI;
+
+  /**
+   * 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;
+
+  /**
+   * 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)
+  {
+    if (sharedUI == null)
+      sharedUI = new MetalButtonUI();
+    return sharedUI;
+  }
+
+  /**
+   * Creates a new instance.
+   */
+  public MetalButtonUI()
+  {
+    super();
+  }
+
+  /**
+   * Returns the color for the focus border.
+   *
+   * @return the color for the focus border
+   */
+  protected Color getFocusColor()
+  {
+    focusColor = UIManager.getColor(getPropertyPrefix() + "focus");
+    return focusColor;
+  }
+
+  /**
+   * Returns the color that indicates a selected button.
+   *
+   * @return the color that indicates a selected button
+   */
+  protected Color getSelectColor()
+  {
+    selectColor = UIManager.getColor(getPropertyPrefix() + "select");
+    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()
+  {
+    disabledTextColor = UIManager.getColor(getPropertyPrefix()
+                                           + "disabledText");
+    return disabledTextColor;
+  }
+
+  /**
+   * Installs the default settings for the specified button.
+   *
+   * @param button  the button.
+   *
+   * @see #uninstallDefaults(AbstractButton)
+   */
+  public void installDefaults(AbstractButton button)
+  {
+    // This is overridden to be public, for whatever reason.
+    super.installDefaults(button);
+  }
+
+  /**
+   * Removes the defaults added by {@link #installDefaults(AbstractButton)}.
+   */
+  public void uninstallDefaults(AbstractButton button)
+  {
+    // This is overridden to be public, for whatever reason.
+    super.uninstallDefaults(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())
+    {
+      g.setColor(getSelectColor());
+      g.fillRect(0, 0, b.getWidth(), b.getHeight());
+    }
+  }
+
+  /**
+   * 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);
+  }
+}