380 lines
10 KiB
Java
380 lines
10 KiB
Java
/* InputEvent.java -- common superclass of component input events
|
|
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.event;
|
|
|
|
import java.awt.Component;
|
|
import gnu.java.awt.EventModifier;
|
|
|
|
/**
|
|
* This is the common superclass for all component input classes. These are
|
|
* passed to listeners before the component, so that listeners can consume
|
|
* the event before it does its default behavior.
|
|
*
|
|
* @author Aaron M. Renn <arenn@urbanophile.com>
|
|
* @see KeyEvent
|
|
* @see KeyAdapter
|
|
* @see MouseEvent
|
|
* @see MouseAdapter
|
|
* @see MouseMotionAdapter
|
|
* @see MouseWheelEvent
|
|
* @since 1.1
|
|
* @status updated to 1.4
|
|
*/
|
|
public abstract class InputEvent extends ComponentEvent
|
|
{
|
|
/**
|
|
* Compatible with JDK 1.1+.
|
|
*/
|
|
private static final long serialVersionUID = -2482525981698309786L;
|
|
|
|
/**
|
|
* This is the bit mask which indicates the shift key is down. It is
|
|
* recommended that SHIFT_DOWN_MASK be used instead.
|
|
*
|
|
* @see #SHIFT_DOWN_MASK
|
|
*/
|
|
public static final int SHIFT_MASK = 1;
|
|
|
|
/**
|
|
* This is the bit mask which indicates the control key is down. It is
|
|
* recommended that CTRL_DOWN_MASK be used instead.
|
|
*
|
|
* @see #CTRL_DOWN_MASK
|
|
*/
|
|
public static final int CTRL_MASK = 2;
|
|
|
|
/**
|
|
* This is the bit mask which indicates the meta key is down. It is
|
|
* recommended that META_DOWN_MASK be used instead.
|
|
*
|
|
* @see #META_DOWN_MASK
|
|
*/
|
|
public static final int META_MASK = 4;
|
|
|
|
/**
|
|
* This is the bit mask which indicates the alt key is down. It is
|
|
* recommended that ALT_DOWN_MASK be used instead.
|
|
*
|
|
* @see #ALT_DOWN_MASK
|
|
*/
|
|
public static final int ALT_MASK = 8;
|
|
|
|
/**
|
|
* This is the bit mask which indicates the alt-graph modifier is in effect.
|
|
* It is recommended that ALT_GRAPH_DOWN_MASK be used instead.
|
|
*
|
|
* @see #ALT_GRAPH_DOWN_MASK
|
|
*/
|
|
public static final int ALT_GRAPH_MASK = 0x20;
|
|
|
|
/**
|
|
* This bit mask indicates mouse button one is down. It is recommended that
|
|
* BUTTON1_DOWN_MASK be used instead.
|
|
*
|
|
* @see #BUTTON1_DOWN_MASK
|
|
*/
|
|
public static final int BUTTON1_MASK = 0x10;
|
|
|
|
/**
|
|
* This bit mask indicates mouse button two is down. It is recommended that
|
|
* BUTTON2_DOWN_MASK be used instead.
|
|
*
|
|
* @see #BUTTON2_DOWN_MASK
|
|
*/
|
|
public static final int BUTTON2_MASK = 8;
|
|
|
|
/**
|
|
* This bit mask indicates mouse button three is down. It is recommended
|
|
* that BUTTON3_DOWN_MASK be used instead.
|
|
*
|
|
* @see #BUTTON3_DOWN_MASK
|
|
*/
|
|
public static final int BUTTON3_MASK = 4;
|
|
|
|
/**
|
|
* The SHIFT key extended modifier.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static final int SHIFT_DOWN_MASK = 0x0040;
|
|
|
|
/**
|
|
* The CTRL key extended modifier.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static final int CTRL_DOWN_MASK = 0x0080;
|
|
|
|
/**
|
|
* The META key extended modifier.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static final int META_DOWN_MASK = 0x0100;
|
|
|
|
/**
|
|
* The ALT key extended modifier.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static final int ALT_DOWN_MASK = 0x0200;
|
|
|
|
/**
|
|
* The mouse button1 key extended modifier.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static final int BUTTON1_DOWN_MASK = 0x0400;
|
|
|
|
/**
|
|
* The mouse button2 extended modifier.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static final int BUTTON2_DOWN_MASK = 0x0800;
|
|
|
|
/**
|
|
* The mouse button3 extended modifier.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static final int BUTTON3_DOWN_MASK = 0x1000;
|
|
|
|
/**
|
|
* The ALT_GRAPH key extended modifier.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static final int ALT_GRAPH_DOWN_MASK = 0x2000;
|
|
|
|
/** The mask to convert new to old, package visible for use in subclasses. */
|
|
static final int CONVERT_MASK
|
|
= EventModifier.NEW_MASK & ~(BUTTON2_DOWN_MASK | BUTTON3_DOWN_MASK);
|
|
|
|
/**
|
|
* The timestamp when this event occurred.
|
|
*
|
|
* @see #getWhen()
|
|
* @serial the timestamp
|
|
*/
|
|
private final long when;
|
|
|
|
/**
|
|
* The modifiers in effect for this event. Package visible for use by
|
|
* subclasses. The old style (bitmask 0x3f) should not be mixed with the
|
|
* new style (bitmasks 0xffffffc0).
|
|
*
|
|
* @see #getModifiers()
|
|
* @see MouseEvent
|
|
* @serial the modifier state, stored in the new style
|
|
*/
|
|
int modifiers;
|
|
|
|
/**
|
|
* Initializes a new instance of <code>InputEvent</code> with the specified
|
|
* source, id, timestamp, and modifiers. Note that an invalid id leads to
|
|
* unspecified results.
|
|
*
|
|
* @param source the source of the event
|
|
* @param id the event id
|
|
* @param when the timestamp when the event occurred
|
|
* @param modifiers the modifiers in effect for this event, old or new style
|
|
* @throws IllegalArgumentException if source is null
|
|
*/
|
|
InputEvent(Component source, int id, long when, int modifiers)
|
|
{
|
|
super(source, id);
|
|
this.when = when;
|
|
this.modifiers = EventModifier.extend(modifiers);
|
|
}
|
|
|
|
/**
|
|
* This method tests whether or not the shift key was down during the event.
|
|
*
|
|
* @return true if the shift key is down
|
|
*/
|
|
public boolean isShiftDown()
|
|
{
|
|
return (modifiers & SHIFT_DOWN_MASK) != 0;
|
|
}
|
|
|
|
/**
|
|
* This method tests whether or not the control key was down during the
|
|
* event.
|
|
*
|
|
* @return true if the control key is down
|
|
*/
|
|
public boolean isControlDown()
|
|
{
|
|
return (modifiers & CTRL_DOWN_MASK) != 0;
|
|
}
|
|
|
|
/**
|
|
* This method tests whether or not the meta key was down during the event.
|
|
*
|
|
* @return true if the meta key is down
|
|
*/
|
|
public boolean isMetaDown()
|
|
{
|
|
return (modifiers & META_DOWN_MASK) != 0;
|
|
}
|
|
|
|
/**
|
|
* This method tests whether or not the alt key was down during the event.
|
|
*
|
|
* @return true if the alt key is down
|
|
*/
|
|
public boolean isAltDown()
|
|
{
|
|
return (modifiers & ALT_DOWN_MASK) != 0;
|
|
}
|
|
|
|
/**
|
|
* This method tests whether or not the alt-graph modifier was in effect
|
|
* during the event.
|
|
*
|
|
* @return true if the alt-graph modifier is down
|
|
*/
|
|
public boolean isAltGraphDown()
|
|
{
|
|
return (modifiers & ALT_GRAPH_DOWN_MASK) != 0;
|
|
}
|
|
|
|
/**
|
|
* This method returns the timestamp when this event occurred.
|
|
*
|
|
* @return the timestamp when this event occurred
|
|
*/
|
|
public long getWhen()
|
|
{
|
|
return when;
|
|
}
|
|
|
|
/**
|
|
* This method returns the old-style modifiers in effect for this event.
|
|
* Note that this is ambiguous between button2 and alt, and between
|
|
* button3 and meta. Also, code which generated these modifiers tends to
|
|
* only list the modifier that just changed, even if others were down at
|
|
* the time. Consider using getModifiersEx instead. This will be a union
|
|
* of the bit masks defined in this class that are applicable to the event.
|
|
*
|
|
* @return the modifiers in effect for this event
|
|
* @see #getModifiersEx()
|
|
*/
|
|
public int getModifiers()
|
|
{
|
|
return EventModifier.revert(modifiers);
|
|
}
|
|
|
|
/**
|
|
* Returns the extended modifiers (new-style) for this event. This represents
|
|
* the state of all modal keys and mouse buttons at the time of the event,
|
|
* and does not suffer from the problems mentioned in getModifiers.
|
|
*
|
|
* <p>For an example of checking multiple modifiers, this code will return
|
|
* true only if SHIFT and BUTTON1 were pressed and CTRL was not:
|
|
* <pre>
|
|
* int onmask = InputEvent.SHIFT_DOWN_MASK | InputEvent.BUTTON1_DOWN_MASK;
|
|
* int offmask = InputEvent.CTRL_DOWN_MASK;
|
|
* return (event.getModifiersEx() & (onmask | offmask)) == onmask;
|
|
* </pre>
|
|
*
|
|
* @return the bitwise or of all modifiers pressed during the event
|
|
* @since 1.4
|
|
*/
|
|
public int getModifiersEx()
|
|
{
|
|
return modifiers;
|
|
}
|
|
|
|
/**
|
|
* Consumes this event. A consumed event is not processed further by the AWT
|
|
* system.
|
|
*/
|
|
public void consume()
|
|
{
|
|
consumed = true;
|
|
}
|
|
|
|
/**
|
|
* This method tests whether or not this event has been consumed.
|
|
*
|
|
* @return true if this event has been consumed
|
|
*/
|
|
public boolean isConsumed()
|
|
{
|
|
return consumed;
|
|
}
|
|
|
|
/**
|
|
* Convert the extended modifier bitmask into a String, such as "Shift" or
|
|
* "Ctrl+Button1".
|
|
*
|
|
* XXX Sun claims this can be localized via the awt.properties file - how
|
|
* do we implement that?
|
|
*
|
|
* @return a string representation of the modifiers in this bitmask
|
|
* @since 1.4
|
|
*/
|
|
public static String getModifiersExText(int modifiers)
|
|
{
|
|
modifiers &= EventModifier.NEW_MASK;
|
|
if (modifiers == 0)
|
|
return "";
|
|
StringBuffer s = new StringBuffer();
|
|
if ((modifiers & META_DOWN_MASK) != 0)
|
|
s.append("Meta+");
|
|
if ((modifiers & CTRL_DOWN_MASK) != 0)
|
|
s.append("Ctrl+");
|
|
if ((modifiers & ALT_DOWN_MASK) != 0)
|
|
s.append("Alt+");
|
|
if ((modifiers & SHIFT_DOWN_MASK) != 0)
|
|
s.append("Shift+");
|
|
if ((modifiers & ALT_GRAPH_DOWN_MASK) != 0)
|
|
s.append("Alt Graph+");
|
|
if ((modifiers & BUTTON1_DOWN_MASK) != 0)
|
|
s.append("Button1+");
|
|
if ((modifiers & BUTTON2_DOWN_MASK) != 0)
|
|
s.append("Button2+");
|
|
if ((modifiers & BUTTON3_DOWN_MASK) != 0)
|
|
s.append("Button3+");
|
|
return s.substring(0, s.length() - 1);
|
|
}
|
|
} // class InputEvent
|