1 files changed, 48 insertions, 0 deletions
diff --git a/java/gjt/CardPanel.java b/java/gjt/CardPanel.java
new file mode 100644
index 00000000000..c2ab1a9033c
--- /dev/null
+++ b/java/gjt/CardPanel.java
@@ -0,0 +1,48 @@
+package gjt;
+
+import java.awt.*;
+
+/**
+ * CardPanel employs a BorderLayout to lay out North and Center 
+ * panels; extensions of CardPanel must implement 
+ * Component viewSelector().  The component returned from 
+ * Component viewSelector() is centered in the North panel, and 
+ * should contain UI controls that allow selection of the 
+ * component to be displayed in the Center panel.<p>
+ *
+ * @version 1.0, Apr 1 1996
+ * @author  David Geary
+ * @see     IconCardPanel
+ * @see     ChoiceCardPanel
+ * @see     gjt.test.ChoiceCardPanelTest
+ * @see     gjt.test.IconCardPanelTest
+ */
+public abstract class CardPanel extends Panel {
+    private Panel       north, center;
+    private CardLayout  cards;
+
+    abstract public Component viewSelector();
+
+    public CardPanel() {
+        center = new Panel();
+        north  = new Panel();
+        
+        setLayout(new BorderLayout());
+        center.setLayout(cards = new CardLayout());
+        north.setLayout (new BorderLayout());
+
+        add("North",  north);
+        add("Center", center);
+    }
+    public void addNotify() {
+        super.addNotify();
+        north.add("Center", viewSelector());
+        north.add("South",  new Separator());
+    }
+    protected void addView(String name, Component component) {
+        center.add(name, component);
+    }
+    protected void showView(String name) {
+        cards.show(center, name); 
+    }
+}