From eced91210fd097e28da3221c00e99aaf89fb889d Mon Sep 17 00:00:00 2001
From: graydon <graydon@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 22 Jan 2004 09:54:19 +0000
Subject: 2004-01-22  Graydon Hoare  <graydon@redhat.com>

	* gnu/java/awt/peer/gtk/GdkClasspathFontPeer.java:
	* gnu/java/awt/peer/gtk/GdkGlyphVector.java:
	Predicate static initialization on GtkToolkit.useGraphics2D().
	* java/awt/Component.java (processPaintEvent): Consume event.
	* javax/swing/AbstractButton.java: Reimplement, document.
	* javax/swing/DefaultButtonModel.java: Reimplement, document.
	* javax/swing/JComponent.java (paint): Use double buffer.
	(listenerList): Enable member.
	* javax/swing/ToggleButtonModel.java: Remove incorrect constructor.
	* javax/swing/JToggleButton.java
	(JToggleButton): Modify model constructor.
	* javax/swing/SwingUtilities.java
	(layoutCompoundLabel): Adjust arithmetic.
	* javax/swing/plaf/basic/BasicButtonUI.java: Reimplement, document.
	* javax/swing/plaf/basic/BasicGraphicsUtils.java
	(getPreferredButtonSize): Include margins in calculation.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkWindowPeer.c
	(Java_gnu_java_awt_peer_gtk_GtkWindowPeer_connectSignals):
	Receive up events from subordinate layout component.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@76344 138bc75d-0d04-0410-961f-82ee72b054a4
---
 libjava/javax/swing/DefaultButtonModel.java | 459 ++++++++++++++++++++++------
 1 file changed, 371 insertions(+), 88 deletions(-)

(limited to 'libjava/javax/swing/DefaultButtonModel.java')

diff --git a/libjava/javax/swing/DefaultButtonModel.java b/libjava/javax/swing/DefaultButtonModel.java
index 52b78b33782..1997e6a1ff2 100644
--- a/libjava/javax/swing/DefaultButtonModel.java
+++ b/libjava/javax/swing/DefaultButtonModel.java
@@ -1,5 +1,5 @@
 /* DefaultButtonModel.java -- 
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.
 
@@ -35,9 +35,10 @@ 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;
 
+import java.awt.AWTEvent;
+import java.awt.AWTEventMulticaster;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.ItemEvent;
@@ -49,130 +50,412 @@ import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 import javax.swing.event.EventListenerList;
 
-public class DefaultButtonModel
-  implements ButtonModel, Serializable
+/**
+ * The purpose of this class is to model the dynamic state of an abstract
+ * button. The concrete button type holding this state may be a a "toggle"
+ * button (checkbox, radio button) or a "push" button (menu button, button).
+ * 
+ * Any change to the model's properties will trigger the firing of a
+ * ChangeEvent.
+ *
+ * Any change to the "pressed" property will trigger the firing of an
+ * ItemEvent in addition to ChangeEvent.
+ *
+ * Any change which causes the enabled, armed and pressed properties to
+ * simultaneously become <code>true</code> will trigger the firing of an
+ * ActionEvent in addition to the ChangeEvent.
+ *
+ * @author Graydon Hoare (graydon&064;redhat.com)
+ */
+public class DefaultButtonModel implements ButtonModel, Serializable
 {
   static final long serialVersionUID = -5342609566534980231L;
 
-    Vector actions          = new Vector();
+  /** Indicates that the button is <em>partially</em> committed to being
+   pressed, but not entirely. This usually happens when a user has pressed
+   but not yet released the mouse button. */
+  static int ARMED = 1;
 
-    Vector items    = new Vector();
-    Vector changes  = new Vector();
-    ButtonGroup group;
-    JComponent comp;
+  /** State constant indicating that the button is enabled. Buttons cannot
+   be pressed or selected unless they are enabled. */
+  static int ENABLED = 2;
 
-    
-    DefaultButtonModel(JComponent a)
-    {
-	comp = a;
-    }
+  /** State constant indicating that the button has been fully
+   pressed. This usually happens when a user has released the mouse over a
+   previously "armed" button. */
+  static int PRESSED = 4;
+
+  /** State constant indicating that the mouse is currently positioned over
+      the button. */
+  static int ROLLOVER = 8;
 
+  /** State constant indicating that the button is selected. This constant
+      is only meaningful for toggle-type buttons (radio buttons,
+      checkboxes). */
+  static int SELECTED = 16;
+
+  /** Represents the "state properties" (armed, enabled, pressed, rollover
+      and selected) by a bitwise combination of integer constants. */
+  int stateMask;
+
+  /** List of ItemListeners, ChangeListeners, and ActionListeners
+      registered on this model. */
+  EventListenerList listenerList;
+
+  /** The single ChangeEvent this model (re)uses to call its
+      ChangeListeners. */
+  ChangeEvent changeEvent;
+
+  /** The group this model belongs to. Only one button in a group may be
+      selected at any given time. */
+    ButtonGroup group;
 
+  /** The key code (one of {@link java.awt.event.KeyEvent} VK_*) used to
+      press this button via a keyboard interface. */
+  int mnemonic;
+
+  /** The string used as the "command" property of any ActionEvent this
+      model sends. */
+  String actionCommand;
+
+  public DefaultButtonModel()
+  {
+    stateMask = 0;
+    listenerList = new EventListenerList();    
+    changeEvent = new ChangeEvent(this);
+  }
+
+  /**
+   * Return <code>null</code>. Use {@link AbstractButton} if you wish to
+   * interface with a button via an {@link ItemSelectable} interface.
+   *
+   * @return <code>null</code>
+   */
     public Object[] getSelectedObjects()
     {
 	return null;
     }
 
-
-    public void fireItemStateChanged(ItemEvent event)
-    {
-	for (int i=0;i<items.size();i++)
+  /**
+   * Add an ActionListener to the model. Usually only called to subscribe
+   * an AbstractButton's listener to the model.
+   *
+   * @param l The listener to add
+   */
+  public void addActionListener(ActionListener l)
 	    {
-		ItemListener a = (ItemListener) items.get(i);
-		a.itemStateChanged(event);
-	    }
+    listenerList.add(ActionListener.class, l);
     }
-    public void fireStateChanged(ChangeEvent event)
+
+  /**
+   * Remove an ActionListener to the model. Usually only called to
+   * unsubscribe an AbstractButton's listener to the model.
+   *
+   * @param l The listener to remove
+   */
+  public void removeActionListener(ActionListener l)
+  {
+    listenerList.remove(ActionListener.class, l);
+  }
+
+  /**
+   * Add an ItemListener to the model. Usually only called to subscribe
+   * an AbstractButton's listener to the model.
+   *
+   * @param l The listener to add
+   */
+  public void addItemListener(ItemListener l)
+  {
+    listenerList.add(ItemListener.class, l);
+  }
+
+  /**
+   * Remove an ItemListener to the model. Usually only called to
+   * unsubscribe an AbstractButton's listener to the model.
+   *
+   * @param l The listener to remove
+   */
+  public void removeItemListener(ItemListener l)
+  {
+    listenerList.remove(ItemListener.class, l);
+  }
+
+  /**
+   * Add a ChangeListener to the model. Usually only called to subscribe
+   * an AbstractButton's listener to the model.
+   *
+   * @param l The listener to add
+   */
+  public void addChangeListener(ChangeListener l)
+  {
+    listenerList.add(ChangeListener.class, l);
+  }
+
+  /**
+   * Remove a ChangeListener to the model. Usually only called to
+   * unsubscribe an AbstractButton's listener to the model.
+   *
+   * @param l The listener to remove
+   */
+  public void removeChangeListener(ChangeListener l)
+  {
+    listenerList.remove(ChangeListener.class, l);
+  }
+
+  /**
+   * Inform each ItemListener in the {@link listenerList} that an ItemEvent
+   * has occurred. This happens in response to any change to the {@link
+   * stateMask} field.
+   *
+   * @param e The ItemEvent to fire
+   */
+  public void fireItemStateChanged(ItemEvent e)
+  {
+    EventListener[] ll = listenerList.getListeners(ItemListener.class);
+    for (int i = 0; i < ll.length; i++)
+      ((ItemListener)ll[i]).itemStateChanged(e);
+  }
+
+  /**
+   * Inform each ActionListener in the {@link listenerList} that an
+   * ActionEvent has occurred. This happens in response to the any change
+   * to the {@link stateMask} field which makes the enabled, armed and
+   * pressed properties all simultaneously <code>true</code>.
+   *
+   * @param e The ActionEvent to fire
+   */
+  public void fireActionPerformed(ActionEvent e)
+  {
+    EventListener[] ll = listenerList.getListeners(ActionListener.class);
+    for (int i = 0; i < ll.length; i++)
+      ((ActionListener)ll[i]).actionPerformed(e);
+  }
+
+  /**
+   * Inform each ChangeListener in the {@link listenerList} that a
+   * ChangeEvent has occurred. This happens in response to the any change
+   * to a property of the model.
+   *
+   * @param event The ChangeEvent to fire
+   */
+  public void fireStateChanged(ChangeEvent e)
+  {
+    EventListener[] ll = listenerList.getListeners(ChangeListener.class);
+    for (int i = 0; i < ll.length; i++)
+      ((ChangeListener)ll[i]).stateChanged(e);
+  }
+
+  /**
+   * Helper method to fire a ChangeEvent with the model as the event's
+   * source.
+   */
+  protected void changeState(int stateflag, boolean b)
     {
-	for (int i=0;i<changes.size();i++)
+    int oldstate = stateMask;
+    int newstate;
+
+    if (b)
+      newstate = oldstate | stateflag;
+    else
+      newstate = oldstate & ~stateflag;
+
+    if (oldstate == newstate)
+      return;
+
+    stateMask = newstate;
+
+    fireStateChanged(changeEvent);
+
+    if ((newstate & ENABLED) == 0)
+      return;
+
+    if ((oldstate & SELECTED) == 0
+        && (newstate & SELECTED) == SELECTED)
+      fireItemStateChanged(new ItemEvent(this, ItemEvent.ITEM_STATE_CHANGED, 
+                                         null, ItemEvent.SELECTED));
+
+    else if ((oldstate & SELECTED) == SELECTED
+             && (newstate & SELECTED) == 0)
+      fireItemStateChanged(new ItemEvent(this, ItemEvent.ITEM_STATE_CHANGED, 
+                                         null, ItemEvent.DESELECTED));
+
+    else if ((newstate & ARMED) == ARMED
+             && (newstate & PRESSED) == PRESSED)
 	    {
-		ChangeListener a = (ChangeListener) changes.get(i);
-		a.stateChanged(event);
+        fireActionPerformed(new ActionEvent(this, ActionEvent.ACTION_PERFORMED,
+                                            actionCommand));
+        stateMask = stateMask & ~(PRESSED | ARMED);
 	    }
+    
     }
-    public void fireActionPerformed(ActionEvent event)
-    {
-	for (int i=0;i<actions.size();i++)
+
+  /**
+   * Get the value of the model's "armed" property.
+   * 
+   * @return The current "armed" property 
+   */
+  public boolean isArmed()
 	    {
-		ActionListener a = (ActionListener) actions.get(i);
-		a.actionPerformed(event);
-	    }
+    return (stateMask & ARMED) == ARMED;
     }
 
-    boolean arm;
-    public boolean isArmed()          { return arm; }
-    public void setArmed(boolean b)   { arm = b; }
-
-    boolean enabled = true;
-    public boolean isEnabled()         { return enabled; }
-    public void setEnabled(boolean b)  { enabled = b; }
-
-    boolean pressed;
-    public void setPressed(boolean b)  
+  /**
+   * Set the value of the model's "armed" property.
+   *
+   * @param a The new "armed" property
+   */
+  public void setArmed(boolean a)
+  {
+    changeState(ARMED, a);
+  }
+
+  /**
+   * Get the value of the model's "enabled" property.
+   *
+   * @return The current "enabled" property.
+   */
+  public boolean isEnabled()
     {
-	pressed = b; 
+    return (stateMask & ENABLED) == ENABLED;
     }
-    public boolean isPressed()         { return pressed; }
-
 
-    public void removeActionListener(ActionListener l) { actions.removeElement(l); }
-    public void addActionListener(ActionListener l)    
+  /**
+   * Set the value of the model's "enabled" property.
+   *
+   * @param e The new "enabled" property
+   */
+  public void setEnabled(boolean e)
+  {
+    changeState(ENABLED, e);
+  }
+
+  /**
+   * Set the value of the model's "pressed" property.
+   *
+   * @param p The new "pressed" property
+   */
+  public void setPressed(boolean p)
     {	
-	//	comp.enableEvents( AWTEvent.ACTION_EVENT_MASK );
-	actions.addElement(l);    
+    changeState(PRESSED, p);
     }
 
-    public void addItemListener(ItemListener l)        { items.addElement(l); }
-    public void removeItemListener(ItemListener l)     { items.removeElement(l); }
-
-    public void addChangeListener(ChangeListener l)    { changes.addElement(l); }
-    public void removeChangeListener(ChangeListener l) { changes.removeElement(l); }
-
-    boolean roll;
-    public void setRollover(boolean b) { roll = b; }
-    public boolean isRollover()        { return roll; }
-
-    int mne;  
-    public int  getMnemonic()        { return mne; }
-    public void setMnemonic(int key) { mne = key; }
-
-    String com;
-    public void setActionCommand(String s) { com = s; }
-    public String getActionCommand()       { return com; }
-
-    public void setGroup(ButtonGroup group)
+  /**
+   * Get the value of the model's "pressed" property.
+   *
+   * @return The current "pressed" property
+   */
+  public boolean isPressed()
+  {
+    return (stateMask & PRESSED) == PRESSED;
+  }
+
+  /**
+   * Set the value of the model's "rollover" property.
+   *
+   * @param r The new "rollover" property
+   */
+  public void setRollover(boolean r)
+  {
+    changeState(ROLLOVER, r);
+  }
+
+
+  /**
+   * Set the value of the model's "selected" property.
+   *
+   * @param s The new "selected" property
+   */
+  public void setSelected(boolean s)
+  {
+    changeState(SELECTED, s);
+  }
+
+  /**
+   * Get the value of the model's "selected" property.
+   *
+   * @return The current "selected" property
+   */
+  public boolean isSelected()
+  {
+    return (stateMask & SELECTED) == SELECTED;
+  }
+
+  /**
+   * Get the value of the model's "rollover" property.
+   *
+   * @return The current "rollover" property
+   */
+  public boolean isRollover()
     {
-	this.group = group;
+    return (stateMask & ROLLOVER) == ROLLOVER;
     }
 
-    boolean sel;
-    public void setSelected(boolean b) 
+  /**
+   * Get the value of the model's "mnemonic" property.
+   *
+   * @return The current "mnemonic" property
+   */
+  public int getMnemonic()
     { 
-	if (group != null)
+    return mnemonic;
+  }
+
+  /**
+   * Set the value of the model's "mnemonic" property.
+   *
+   * @param key The new "mnemonic" property
+   */
+  public void setMnemonic(int key)
 	    {
-		if (b == true)
+    if (mnemonic != key)
 		    {
-			System.out.println("selected button in group:"+this);
-			group.setSelected(this, b);
-			sel = true;
+        mnemonic = key;
+        fireStateChanged(changeEvent);
 		    }
-		else
+  }
+
+  /**
+   * Set the value of the model's "actionCommand" property. This property
+   * is used as the "command" property of the {@link ActionEvent} fired
+   * from the model.
+   *
+   * @param s The new "actionCommand" property.
+   */
+  public void setActionCommand(String s)
 		    {
-			System.out.println("deselected button in group: " + this);
-			sel = false;
+    if (actionCommand != s)
+      {
+        actionCommand = s;
+        fireStateChanged(changeEvent);
 		    }
 	    } 
-	else
+
+  /**
+   * Set the value of the model's "actionCommand" property. This property
+   * is used as the "command" property of the {@link ActionEvent} fired
+   * from the model.
+   *
+   * @return The current "actionCommand" property
+   */
+  public String getActionCommand()
 	    {
-		sel = b;
+    return actionCommand;
+  }
+
+  /**
+   * Set the value of the model's "group" property. The model is said to be
+   * a member of the {@link ButtonGroup} held in its "group" property, and
+   * only one models in a given group can have their "selected" property be
+   * <code>true</code> at a time.
+   *
+   * @param g The new "group" property
+   */
+  public void setGroup(ButtonGroup g)
+  {
+    if (group != g)
+      {
+        group = g;
+        fireStateChanged(changeEvent);
 	    }
     }
-    public boolean isSelected()        { return sel; }
 }
-
-
-
-
-
-
-
-- 
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