Created SelectableButton to allow highlighting a JButton when selected

without having to create a selected icon.  Changed editor and scene
map panel toolbars to make use of SelectableButton.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@322 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/miso/util/SelectableButton.java

@@ -0,0 +1,90 @@
+//
+// $Id: SelectableButton.java,v 1.1 2001/08/30 01:15:19 shaper Exp $
+
+package com.threerings.miso.util;
+
+import java.awt.*;
+import javax.swing.*;
+
+/**
+ * A selectable button is just a normal <code>JButton</code> that
+ * paints itself with a different background color when selected.
+ * This is frequently desirable; for instance, buttons may be included
+ * in a toolbar and shown highlighted as long as their associated
+ * "mode" is active.
+ *
+ * <p> <code>JButton</code> does provide support for rendering itself
+ * differently via <code>setSelectedIcon()</code>, but creating
+ * selected and unselected icons for each button simply to effect an
+ * alteration in appearance while selected is sometimes more than a
+ * mere programmer may wish to deal with.
+ *
+ * <p> The <code>JRadioButton</code> might be usable excepting that it
+ * doesn't look as visually appealing as the <code>JButton</code> when
+ * painted (it lacks nice borders and shading, and manually adding
+ * those to the radio button is even more of a hack than this, and
+ * still doesn't look quite right.)
+ */
+public class SelectableButton extends JButton
+{
+    public SelectableButton ()
+    {
+	init();
+    }
+
+    public SelectableButton (Icon icon)
+    {
+	super(icon);
+	init();
+    }
+
+    public SelectableButton (String text)
+    {
+	super(text);
+	init();
+    }
+
+    public SelectableButton (Action a)
+    {
+	super(a);
+	init();
+    }
+
+    public SelectableButton (String text, Icon icon)
+    {
+	super(text, icon);
+	init();
+    }
+
+    protected void init ()
+    {
+	setOpaque(false);
+    }
+
+    public void paintComponent (Graphics g)
+    {
+  	if (isSelected()) {
+	    g.setColor(_scol);
+	    Dimension size = getSize();
+  	    g.fillRect(0, 0, size.width, size.height);
+  	}
+
+	super.paintComponent(g);
+    }
+
+    /**
+     * Set the color used to paint the button background when selected.
+     *
+     * @param scol the selected color.
+     */
+    public void setSelectedColor (Color scol)
+    {
+	_scol = scol;
+    }
+
+    /** The default selected color. */
+    protected static final Color DEF_SELECT_COLOR = new Color(152, 152, 152);
+
+    /** The selected color. */
+    protected Color _scol = DEF_SELECT_COLOR;
+}