1 files changed, 173 insertions, 3 deletions

diff --git a/libjava/java/awt/Checkbox.java b/libjava/java/awt/Checkbox.java
index ec1f20d..10c6744 100644
--- a/libjava/java/awt/Checkbox.java
+++ b/libjava/java/awt/Checkbox.java
@@ -7,9 +7,179 @@ Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
 details.  */
 
 package java.awt;
+import java.awt.event.*;
+import java.awt.peer.CheckboxPeer;
 
-/* A very incomplete placeholder. */
-
-public class Checkbox extends Component
+/** This class implements a component which has an on/off state.  Two
+ * or more Checkboxes can be grouped by a CheckboxGroup.
+ * @author Tom Tromey <tromey@redhat.com>
+ * @date December 25, 2000
+ */
+public class Checkbox extends Component implements ItemSelectable
 {
+  /** Create a new checkbox.
+   * @param label The checkbox label.  A null value is the same as "";
+   *              this is the default.
+   * @param state The initial check state; defaults to false.
+   * @param group The CheckboxGroup.  Defaults to null.
+   */
+  public Checkbox ()
+  {
+    this (null, null, false);
+  }
+
+  public Checkbox (String label)
+  {
+    this (label, null, false);
+  }
+
+  public Checkbox (String label, boolean state)
+  {
+    this (label, null, state);
+  }
+
+  public Checkbox (String label, boolean state, CheckboxGroup group)
+  {
+    this (label, group, state);
+  }
+
+  public Checkbox (String label, CheckboxGroup group, boolean state)
+  {
+    this.label = label;
+    this.group = group;
+    this.state = state;
+  }
+
+  /** Add a listener for item events.
+   * @param listener The listener to add.
+   */
+  public synchronized void addItemListener (ItemListener listener)
+  {
+    listeners = AWTEventMulticaster.add (listeners, listener);
+  }
+
+  /** This creates the component's peer.  */
+  public void addNotify ()
+  {
+    if (peer == null)
+      peer = getToolkit ().createCheckbox (this);
+  }
+
+  /** Returns the current CheckboxGroup associated with this
+   * Checkbox.  */
+  public CheckboxGroup getCheckboxGroup ()
+  {
+    return group;
+  }
+
+  /** Returns the current label; might be null.  */
+  public String getLabel ()
+  {
+    return label;
+  }
+
+  /** Returns this checkbox's label if this checkbox is selected.  */
+  public Object[] getSelectedObjects ()
+  {
+    Object[] r;
+    if (state)
+      {
+	r = new Object[1];
+	r[0] = label;
+      }
+    else
+      r = new Object[0];
+    return r;
+  }
+
+  /** Returns the current state of this checkbox.  */
+  public boolean getState ()
+  {
+    return state;
+  }
+
+  /** Generates a String representation of this Checkbox's state.  */
+  protected String paramString ()
+  {
+    return ("Checkbox["
+	    + "state=" + state + ","
+	    + "label=" + label + ","
+	    + "group=" + group + "]");
+  }
+
+  /** Process an event for this Checkbox.
+   * @param event The event the process.
+   */
+  protected void processEvent (AWTEvent event) 
+  {
+    if (event instanceof ItemEvent)
+      processItemEvent ((ItemEvent) event);
+    else
+      super.processEvent (event);
+  }
+
+  /** Process an item event for this Checkbox.
+   * @param event The ItemEvent to process
+   */
+  protected void processItemEvent (ItemEvent event)
+  {
+    if (listeners != null)
+      listeners.itemStateChanged (event);
+  }
+
+  /** Remove an item listener.
+   * @param listener Item listener to remove.
+   */
+  public synchronized void removeItemListener (ItemListener listener)
+  {
+    listeners = AWTEventMulticaster.remove (listeners, listener);
+  }
+
+  /** Set this checkbox's group.
+   * @param group The new group.  null means remove the Checkbox from
+   *              its group.
+   */
+  public void setCheckboxGroup (CheckboxGroup group)
+  {
+    this.group = group;
+    if (peer != null)
+      {
+	CheckboxPeer cp = (CheckboxPeer) peer;
+	cp.setCheckboxGroup (group);
+      }
+  }
+
+  /** Set the checkbox's label.
+   * @param label The new label
+   */
+  public synchronized void setLabel (String label)
+  {
+    this.label = label;
+    if (peer != null)
+      {
+	CheckboxPeer cp = (CheckboxPeer) peer;
+	// FIXME: unclear what to do here; we err on the side of
+	// caution.
+	cp.setLabel (label == null ? "" : label);
+      }
+  }
+
+  /** Set the checkbox's state.
+   * @param state The new state.
+   */
+  public void setState (boolean state)
+  {
+    this.state = state;
+    if (peer != null)
+      {
+	CheckboxPeer cp = (CheckboxPeer) peer;
+	cp.setState (state);
+      }
+  }
+
+  private ItemListener listeners;
+
+  String label;
+  CheckboxGroup group;
+  boolean state;
 }