gcc/libjava/java/awt/Button.java

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/* Button.java -- AWT button widget
Copyright (C) 1999, 2002 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., 59 Temple Place, Suite 330, Boston, MA
02111-1307 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 java.awt;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.peer.ButtonPeer;
import java.lang.reflect.Array;
ComponentDataBlitOp.java: New file. * gnu/gcj/awt/ComponentDataBlitOp.java: New file. * gnu/gcj/awt/GLightweightPeer.java: New file. * java/awt/BorderLayout.java: Implemented all methods. * java/awt/Button.java (actionListener, actionCommand): Renamed and modifier change. (addNotify): Call super. (dispatchEventImpl): New method. (getListeners): New method. (label): Made package-private, not private. * java/awt/Canvas.java: Implemented class body. * java/awt/Color.java (brighter): New method. (darker): New method. (hashCode): New method. * java/awt/Component.java (visible, enabled, eventMask): Set defaults. (getGraphicsConfiguration): Delegate to getGraphicsConfigurationImpl(). (getGraphicsConfigurationImpl): New method. (getToolkit): Only return value from peer if not null. (isDisplayable): Check with parent. (isShowing): No parent implies not showing. (getForeground): Check parent property if local is null. (getBackground): Likewise. (getFont): Likewise. (setForeground): Inform peer. (setBackground): Likewise (setLocale): Invalidate component. (getColorModel): Implemented. (setLocation): Invalidate, or ignore if no change. (setSize): Invalidate, or ignore if no change. (setBounds): Invalidate, or ignore if no change. (isOpaque): By default, heavyweight implies opaque. (isLightweight): Implemented. (getMaximumSize): Implemented. (doLayout): Implemented, NOP. (validate): Implemented, NOP. (invalidate): Only propagate to parent if parent was valid. (getGraphics): Implemented. (getFontMetrics): Implemented. (update): Implemented. (paintAll): Implemented. (repaint): Implemented all repaint methods. (print): Implemented. (printAll): Implemented. (createImage): Implemented. (dispatchEvent): Give the peer a chance to handle the event. (dispatchEventImpl): Dispatch paint events. (enableEvents): Lightweights enable events on parent component. (coalesceEvents): Coalesce paint events, and select event type using a switch. (coalescePaintEvents): New method. (processEvent): Fix unfortunate ordering of statements, and call correct method for MOUSE_CLICKED. (processPaintEvent): New method. (addNotify): Allow container to notify children before event mask is set in peer. (addNotifyContainerChildren): New method. (removeNotify): Visibility should not change on removeNotify. (paramString): Implemented. (list): Implemented two of the list methods. * Container (myInsets): Removed, insets are managed by peer. (getInsets): Query peer. (addImpl): Fix reparenting, enable events for lightweights, initialize component array. (validate): Call doLayout in validateTree() instead. (validateTree): Do nothing if already valid. Call beginValidate(), endValidate() on peer. Call validateTree() instead of validate() for children that are containers. Mark valid after validation of children. (setFont): Partial implementation. (paint): Implemented. (visitChildren): New method. (visitChild): New method. (update): Implemented. (print): Implemented. (paintComponents): Implemented. (printComponents): Consider translation and clipping. (getComponentAt): Ignore invisible children. Return this if no child match. (addNotify): Call super. (addNotifyContainerChildren): New method. (paramString): Implemented. (list): Implemented. * java/awt/EventQueue (invokeAndWait): Get system event queue the right way. (invokeLater): Likewise. (isDispatchThread): Likewise. * java/awt/FontMetrics (getLeading): Formula change. (getDescent): Consider leading also. (getMaxAscent): Default to getAscent(). (getMaxDescent): Default to getDescent. (getMaxAdvance): Return value signifying unknown. (charWidth): Both methods implemented. (charsWidth): Implemented. (bytesWidth): Implemented. (getWidths): Implemented. * java/awt/Frame.java (NORMAL, ICONIFIED, iconImage, isResizable, state): New fields. (Frame): Rearragend constuctor chaining to disallow null being passed as a graphics configuration. (getTitle): Return empty string if null. (dispose): Removed. (getIconImage): New method. (setIconImage): New method. (finalize): New method. (setMenuBar): Notify peer. (isResizable): New method. (setResizable): New method. (getState): New method. (getFont): Removed. (remove): Implemented. (removeNotify): New method. (getFrames): New method. * java/awt/Graphics.java: Implemented body of class. * java/awt/Graphics2D.java: New file. * java/awt/GraphicsConfiguration.java: Enabled part of the API. * java/awt/Image.java: Implemented body of class. * java/awt/Panel.java (Panel): Call correct super constructor. (addNotify): Implemented. * java/awt/Rectangle.java (isEmpty): Fixed reversed logic. * java/awt/RenderingHints.java: New file. * java/awt/Toolkit.java (createComponent): Implemented. (getSystemEventQueue): Delegate to getSystemEventQueueImpl(). * java/awt/Window.java (Window): Two new constructors. Reordered constructor chaining. (getGraphicsConfigurationImpl): New method. (finalize): Call super. (addNotify): Call super. (pack): Do layout stuff. (show): Ensure that peer exists and that component is valid. (dispose): Dispose owned children. (getOwner): Simplify code, casting null pointers is valid. (getGraphicsConfiguration): Ask peer if local value is null. * java/awt/event/ActionEvent.java (getActionCommand): Renamed from getcmd(). * java/awt/image/BufferedImage.java: New file. * java/awt/image/RasterOp.java: New file. * java/awt/peer/ComponentPeer.java (getGraphicsConfiguration): More powerfull replacement for getColorModel(). (getColorModel) Removed. (setEventMask) New method. * Makefile.am: Added new files. * Makefile.in: Rebuilt. From-SVN: r35748
2000-08-16 20:03:48 +02:00
import java.util.EventListener;
/**
* This class provides a button widget for the AWT.
*
* @author Aaron M. Renn (arenn@urbanophile.com)
* @author Tom Tromey <tromey@cygnus.com>
*/
public class Button extends Component implements java.io.Serializable
{
/*
* Static Variables
*/
// FIXME: Need readObject/writeObject for serialization
// Serialization version constant
private static final long serialVersionUID = -8774683716313001058L;
/*************************************************************************/
/*
* Instance Variables
*/
/**
* @serial The action command name for this button.
*/
private String actionCommand;
/**
* @serial The label for this button.
*/
private String label;
// List of ActionListeners for this class.
private transient ActionListener action_listeners;
/*************************************************************************/
/*
* Constructors
*/
/**
* Initializes a new instance of <code>Button</code> with no label.
*
* @exception HeadlessException If GraphicsEnvironment.isHeadless()
* returns true
*/
public
Button()
{
this(null);
}
/*************************************************************************/
/**
* Initializes a new instance of <code>Button</code> with the specified
* label. The action command name is also initialized to this value.
*
* @param label The label to display on the button.
*
* @exception HeadlessException If GraphicsEnvironment.isHeadless()
* returns true
*/
public
Button(String label)
{
this.label = label;
actionCommand = label;
if (GraphicsEnvironment.isHeadless ())
throw new HeadlessException ();
}
/*************************************************************************/
/*
* Instance Variables
*/
/**
* Returns the label for this button.
*
* @return The label for this button.
*/
public String
getLabel()
{
return(label);
}
/*************************************************************************/
/**
* Sets the label for this button to the specified value.
*
* @param label The new label for this button.
*/
public synchronized void
setLabel(String label)
{
this.label = label;
if (peer != null)
{
ButtonPeer bp = (ButtonPeer) peer;
bp.setLabel (label);
}
}
/*************************************************************************/
/**
* Returns the action command name for this button.
*
* @return The action command name for this button.
*/
public String
getActionCommand()
{
return(actionCommand);
}
/*************************************************************************/
/**
* Sets the action command name for this button to the specified value.
*
* @param actionCommand The new action command name.
*/
public void
setActionCommand(String actionCommand)
{
this.actionCommand = actionCommand == null ? label : actionCommand;
}
/*************************************************************************/
/**
* Adds a new entry to the list of listeners that will receive
* action events from this button.
*
* @param listener The listener to add.
*/
public synchronized void
addActionListener(ActionListener listener)
{
action_listeners = AWTEventMulticaster.add(action_listeners, listener);
}
/*************************************************************************/
/**
* Removes the specified listener from the list of listeners that will
* receive action events from this button.
*
* @param listener The listener to remove.
*/
public synchronized void
removeActionListener(ActionListener listener)
{
action_listeners = AWTEventMulticaster.remove(action_listeners, listener);
}
public synchronized ActionListener[] getActionListeners()
{
return (ActionListener[])
AWTEventMulticaster.getListeners(action_listeners,
ActionListener.class);
}
/** Returns all registered EventListers of the given listenerType.
* listenerType must be a subclass of EventListener, or a
* ClassClassException is thrown.
*
* @exception ClassCastException If listenerType doesn't specify a class or
* interface that implements @see java.util.EventListener.
*
* @since 1.3
*/
public EventListener[] getListeners(Class listenerType)
{
if (listenerType == ActionListener.class)
return getActionListeners();
return (EventListener[]) Array.newInstance(listenerType, 0);
}
/*************************************************************************/
/**
* Notifies this button that it should create its native peer object.
*/
public void
addNotify()
{
if (peer == null)
peer = getToolkit ().createButton (this);
super.addNotify();
}
/*************************************************************************/
/**
* Processes an event for this button. If the specified event is an
* instance of <code>ActionEvent</code>, then the
* <code>processActionEvent()</code> method is called to dispatch it
* to any registered listeners. Otherwise, the superclass method
* will be invoked. Note that this method will not be called at all
* unless <code>ActionEvent</code>'s are enabled. This will be done
* implicitly if any listeners are added.
*
* @param event The event to process.
*/
protected void
processEvent(AWTEvent event)
{
if (event instanceof ActionEvent)
processActionEvent((ActionEvent)event);
else
super.processEvent(event);
}
/*************************************************************************/
/**
* This method dispatches an action event for this button to any
* registered listeners.
*
* @param event The event to process.
*/
protected void
processActionEvent(ActionEvent event)
{
if (action_listeners != null)
action_listeners.actionPerformed(event);
}
void
dispatchEventImpl(AWTEvent e)
{
if (e.id <= ActionEvent.ACTION_LAST
&& e.id >= ActionEvent.ACTION_FIRST
&& (action_listeners != null
|| (eventMask & AWTEvent.ACTION_EVENT_MASK) != 0))
processEvent(e);
else
super.dispatchEventImpl(e);
}
/*************************************************************************/
/**
* Returns a debugging string for this button.
*
* @return A debugging string for this button.
*/
protected String
paramString()
{
ButtonPeer.java: Replace with Classpath version. * java/awt/peer/ButtonPeer.java: Replace with Classpath version. * java/awt/peer/CanvasPeer.java: Replace with Classpath version. * java/awt/peer/CheckboxMenuItemPeer.java: Replace with Classpath version. * java/awt/peer/CheckboxPeer.java: Replace with Classpath version. * java/awt/peer/ChoicePeer.java: Replace with Classpath version. * java/awt/peer/ComponentPeer.java: Replace with Classpath version. * java/awt/peer/ContainerPeer.java: Replace with Classpath version. * java/awt/peer/DialogPeer.java: Replace with Classpath version. * java/awt/peer/FileDialogPeer.java: Replace with Classpath version. * java/awt/peer/FontPeer.java: Replace with Classpath version. * java/awt/peer/FramePeer.java: Replace with Classpath version. * java/awt/peer/LabelPeer.java: Replace with Classpath version. * java/awt/peer/LightweightPeer.java: Replace with Classpath version. * java/awt/peer/ListPeer.java: Replace with Classpath version. * java/awt/peer/MenuBarPeer.java: Replace with Classpath version. * java/awt/peer/MenuComponentPeer.java: Replace with Classpath version. * java/awt/peer/MenuItemPeer.java: Replace with Classpath version. * java/awt/peer/MenuPeer.java: Replace with Classpath version. * java/awt/peer/PanelPeer.java: Replace with Classpath version. * java/awt/peer/PopupMenuPeer.java: Replace with Classpath version. * java/awt/peer/ScrollPanePeer.java: Replace with Classpath version. * java/awt/peer/ScrollbarPeer.java: Replace with Classpath version. * java/awt/peer/TextAreaPeer.java: Replace with Classpath version. * java/awt/peer/TextComponentPeer.java: Replace with Classpath version. * java/awt/peer/TextFieldPeer.java: Replace with Classpath version. * java/awt/peer/WindowPeer.java: Replace with Classpath version. * gnu/awt/xlib/XPanelPeer.java (insets): New method. * gnu/awt/xlib/XCanvasPeer.java (show, hide): New methods. (minimumSize, preferredSize, reshape): Likewise. * gnu/awt/xlib/XFramePeer.java (insets, enable, disable, getColorModel): New methods. * java/awt/PopupMenu.java: Merged with Classpath. * java/awt/MenuBar.java: Merged with Classpath. * java/awt/SystemColor.java: Replace with Classpath version. * java/awt/Panel.java: Merged with Classpath. * java/awt/PaintContext.java: Updated copyright. * java/awt/MenuShortcut.java: Merged with Classpath. * java/awt/MenuContainer.java: Merged with Classpath. * java/awt/Menu.java: Merged with Classpath. * java/awt/MediaEntry.java: New file from Classpath. * java/awt/MediaTracker.java: New file from Classpath. * java/awt/List.java: Merged with Classpath version. * java/awt/Insets.java: Merged with Classpath version. * java/awt/ImageMediaEntry.java: New file from Classpath. * java/awt/Image.java: Replaced with Classpath version. * java/awt/FontMetrics.java: Merged with Classpath version. * java/awt/Cursor.java (getDefaultCursor): Use DEFAULT_CURSOR constant. * java/awt/Font.java: Merged with Classpath version. * java/awt/Dialog.java: Merged with Classpath version. * java/awt/Color.java: Merged with Classpath version. * java/awt/Choice.java: Merged with Classpath version. * java/awt/CheckboxMenuItem.java: Merged with Classpath version. * java/awt/Adjustable.java: Replace with Classpath version. * java/awt/MenuItem.java (paramString): Don't include class name or brackets. Call superclass paramString. * java/awt/MenuComponent.java (toString): Call paramString. (paramString): Compute string; don't call toString. * java/awt/Label.java (paramString): Don't include class name or brackets. Call superclass paramString. * java/awt/Checkbox.java (paramString): Don't include class name or brackets. Call superclass paramString. * java/awt/Button.java (paramString): Don't include class name or brackets. Call superclass paramString. * java/awt/MenuComponent.java (getTreeLock): Now protected. From-SVN: r49099
2002-01-22 23:03:04 +01:00
return ("label=" + getLabel() + ",actionCommand=" + getActionCommand()
+ "," + super.paramString());
}
} // class Button