JDK 1.1 Source Code Directory
JDK 1.1 source code directory contains Java source code for JDK 1.1 core classes:
"C:\fyicenter\jdk-1.1.8\src".
Here is the list of Java classes of the JDK 1.1 source code:
✍: FYIcenter
⏎ java/awt/Component.java
/*
* @(#)Component.java 1.192 01/12/10
*
* Copyright 2002 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.awt;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Vector;
import java.util.Locale;
import java.awt.peer.ComponentPeer;
import java.awt.image.ImageObserver;
import java.awt.image.ImageProducer;
import java.awt.image.ColorModel;
import java.awt.event.*;
import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import sun.awt.im.InputContext;
/**
* A <em>component</em> is an object having a graphical representation
* that can be displayed on the screen and that can interact with the
* user. Examples of components are the buttons, checkboxes, and scrollbars
* of a typical graphical user interface. <p>
* The <code>Component</code> class is the abstract superclass of
* the nonmenu-related Abstract Window Toolkit components. Class
* <code>Component</code> can also be extended directly to create a
* lightweight component. A lightweight component is a component that is
* not associated with a native opaque window.
*
* @version 1.192 01/12/10
* @author Arthur van Hoff
* @author Sami Shaio
*/
public abstract class Component implements ImageObserver, MenuContainer,
Serializable
{
/**
* The peer of the component. The peer implements the component's
* behaviour. The peer is set when the Component is added to a
* container that also is a peer.
* @see #addNotify
* @see #removeNotify
*/
transient ComponentPeer peer;
/**
* The parent of the object. It may be null for top-level components.
* @see #getParent
*/
transient Container parent;
/**
* The x position of the component in the parent's coordinate system.
* @see #getLocation
*/
int x;
/**
* The y position of the component in the parent's coordinate system.
* @see #getLocation
*/
int y;
/**
* The width of the component.
* @see #getSize
*/
int width;
/**
* The height of the component.
* @see #getSize
*/
int height;
/**
* The foreground color for this component.
* @see #getForeground
* @see #setForeground
*/
Color foreground;
/**
* The background color for this component.
* @see #getBackground
* @see #setBackground
*/
Color background;
/**
* The font used by this component.
* @see #getFont
* @see #setFont
*/
Font font;
/**
* The cursor displayed when pointer is over this component.
* @see #getCursor
* @see #setCursor
*/
Cursor cursor;
/**
* The locale for the component.
* @see #getLocale
* @see #setLocale
*/
Locale locale;
/**
* True when the object is visible. An object that is not
* visible is not drawn on the screen.
* @see #isVisible
* @see #setVisible
*/
boolean visible = true;
/**
* True when the object is enabled. An object that is not
* enabled does not interact with the user.
* @see #isEnabled
* @see #setEnabled
*/
boolean enabled = true;
/**
* True when the object is valid. An invalid object needs to
* be layed out. This flag is set to false when the object
* size is changed.
* @see #isValid
* @see #validate
* @see #invalidate
*/
boolean valid = false;
Vector popups;
private String name;
private boolean nameExplicitlySet = false;
/**
* The locking object for AWT component-tree and layout operations.
*
* @see #getTreeLock
*/
static final Object LOCK = new Object();
/** Internal, cached size information */
Dimension minSize;
/** Internal, cached size information */
Dimension prefSize;
boolean newEventsOnly = false;
transient ComponentListener componentListener;
transient FocusListener focusListener;
transient KeyListener keyListener;
transient MouseListener mouseListener;
transient MouseMotionListener mouseMotionListener;
/** Internal, constants for serialization */
final static String actionListenerK = "actionL";
final static String adjustmentListenerK = "adjustmentL";
final static String componentListenerK = "componentL";
final static String containerListenerK = "containerL";
final static String focusListenerK = "focusL";
final static String itemListenerK = "itemL";
final static String keyListenerK = "keyL";
final static String mouseListenerK = "mouseL";
final static String mouseMotionListenerK = "mouseMotionL";
final static String textListenerK = "textL";
final static String windowListenerK = "windowL";
// The eventMask is ONLY set by subclasses via enableEvents.
// The mask should NOT be set when listeners are registered
// so that we can distinguish the difference between when
// listeners request events and subclasses request them.
long eventMask;
/**
* Static properties for incremental drawing.
* @see #imageUpdate
*/
static boolean isInc;
static int incRate;
static {
String s;
s = System.getProperty("awt.image.incrementaldraw");
isInc = (s == null || s.equals("true"));
s = System.getProperty("awt.image.redrawrate");
incRate = (s != null) ? Integer.parseInt(s) : 100;
}
/**
* Ease-of-use constant for <code>getAlignmentY()</code>. Specifies an
* alignment to the top of the component.
* @see #getAlignmentY
*/
public static final float TOP_ALIGNMENT = 0.0f;
/**
* Ease-of-use constant for <code>getAlignmentY</code> and
* <code>getAlignmentX</code>. Specifies an alignment to
* the center of the component
* @see #getAlignmentX
* @see #getAlignmentY
*/
public static final float CENTER_ALIGNMENT = 0.5f;
/**
* Ease-of-use constant for <code>getAlignmentY</code>. Specifies an
* alignment to the bottom of the component.
* @see #getAlignmentY
*/
public static final float BOTTOM_ALIGNMENT = 1.0f;
/**
* Ease-of-use constant for <code>getAlignmentX</code>. Specifies an
* alignment to the left side of the component.
* @see #getAlignmentX
*/
public static final float LEFT_ALIGNMENT = 0.0f;
/**
* Ease-of-use constant for <code>getAlignmentX</code>. Specifies an
* alignment to the right side of the component.
* @see #getAlignmentX
*/
public static final float RIGHT_ALIGNMENT = 1.0f;
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = -7644114512714619750L;
/**
* Constructs a new component. Class <code>Component</code> can be
* extended directly to create a lightweight component that does not
* utilize an opaque native window. A lightweight component must be
* hosted by a native container somewhere higher up in the component
* tree (for example, by a <code>Frame</code> object).
*/
protected Component() {
}
/**
* Construct a name for this component. Called by getName() when the
* name is null.
*/
String constructComponentName() {
return null; // For strict compliance with prior JDKs, a Component
// that doesn't set its name should return null from
// getName();
}
/**
* Gets the name of the component.
* @return This component's name.
* @see #setName
* @since JDK1.1
*/
public String getName() {
if (name == null && !nameExplicitlySet) {
synchronized(this) {
if (name == null && !nameExplicitlySet)
name = constructComponentName();
}
}
return name;
}
/**
* Sets the name of the component to the specified string.
* @param <code>name</code> The string that is to be this
* component's name.
* @see #getName
* @since JDK1.1
*/
public void setName(String name) {
synchronized(this) {
this.name = name;
nameExplicitlySet = true;
}
}
/**
* Gets the parent of this component.
* @return The parent container of this component.
* @since JDK1.0
*/
public Container getParent() {
return parent;
}
/**
* @deprecated As of JDK version 1.1,
* programs should not directly manipulate peers.
*/
public ComponentPeer getPeer() {
return peer;
}
/**
* Gets this component's locking object (the object that owns the thread
* sychronization monitor) for AWT component-tree and layout
* operations.
* @return This component's locking object.
*/
public final Object getTreeLock() {
return LOCK;
}
/**
* Gets the toolkit of this component. Note that
* the frame that contains a component controls which
* toolkit is used by that component. Therefore if the component
* is moved from one frame to another, the toolkit it uses may change.
* @return The toolkit of this component.
* @since JDK1.0
*/
public Toolkit getToolkit() {
ComponentPeer peer = this.peer;
if ((peer != null) && ! (peer instanceof java.awt.peer.LightweightPeer)){
return peer.getToolkit();
}
Container parent = this.parent;
if (parent != null) {
return parent.getToolkit();
}
return Toolkit.getDefaultToolkit();
}
/**
* Determines whether this component is valid. Components are
* invalidated when they are first shown on the screen.
* @return <code>true</code> if the component is valid; <code>false</code>
* otherwise.
* @see #validate
* @see #invalidate
* @since JDK1.0
*/
public boolean isValid() {
return (peer != null) && valid;
}
/**
* Determines whether this component is visible. Components are
* initially visible, with the exception of top level components such
* as <code>Frame</code> objects.
* @return <code>true</code> if the component is visible;
* <code>false</code> otherwise.
* @see #setVisible
* @since JDK1.0
*/
public boolean isVisible() {
return visible;
}
/**
* Determines whether this component is showing on screen. This means
* that the component must be visible, and it must be in a container
* that is visible and showing.
* @return <code>true</code> if the component is showing;
* <code>false</code> otherwise.
* @see #setVisible
* @since JDK1.0
*/
public boolean isShowing() {
if (visible && (peer != null)) {
Container parent = this.parent;
return (parent == null) || parent.isShowing();
}
return false;
}
/**
* Determines whether this component is enabled. An enabled component
* can respond to user input and generate events. Components are
* enabled initially by default. A component may be enabled or disabled by
* calling its <code>setEnabled</code> method.
* @return <code>true</code> if the component is enabled;
* <code>false</code> otherwise.
* @see #setEnabled
* @since JDK1.0
*/
public boolean isEnabled() {
return enabled;
}
/**
* Enables or disables this component, depending on the value of the
* parameter <code>b</code>. An enabled component can respond to user
* input and generate events. Components are enabled initially by default.
* @param <code>b</code> If <code>true</code>, this component is
* enabled; otherwise this component is disabled.
* @see #isEnabled
* @since JDK1.1
*/
public void setEnabled(boolean b) {
enable(b);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setEnabled(boolean)</code>.
*/
public void enable() {
if (enabled != true) {
//synchronized (getTreeLock()) { // Removed for Bug #4114201
enabled = true;
ComponentPeer peer = this.peer;
if (peer != null) {
peer.enable();
}
//}
}
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setEnabled(boolean)</code>.
*/
public void enable(boolean b) {
if (b) {
enable();
} else {
disable();
}
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setEnabled(boolean)</code>.
*/
public void disable() {
if (enabled != false) {
//synchronized (getTreeLock()) { //Removed for Bug #4114201
enabled = false;
ComponentPeer peer = this.peer;
if (peer != null) {
peer.disable();
}
//}
}
}
/**
* Shows or hides this component depending on the value of parameter
* <code>b</code>.
* @param <code>b</code> If <code>true</code>, shows this component;
* otherwise, hides this component.
* @see #isVisible
* @since JDK1.1
*/
public void setVisible(boolean b) {
show(b);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setVisible(boolean)</code>.
*/
public void show() {
if (visible != true) {
//synchronized (getTreeLock()) { //Removed for Bug #4114201
visible = true;
ComponentPeer peer = this.peer;
if (peer != null) {
peer.show();
if (peer instanceof java.awt.peer.LightweightPeer) {
repaint();
}
}
if (componentListener != null ||
(eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0) {
ComponentEvent e = new ComponentEvent(this,
ComponentEvent.COMPONENT_SHOWN);
Toolkit.getEventQueue().postEvent(e);
}
//}
Container parent = this.parent;
if (parent != null) {
parent.invalidate();
}
}
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setVisible(boolean)</code>.
*/
public void show(boolean b) {
if (b) {
show();
} else {
hide();
}
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setVisible(boolean)</code>.
*/
public void hide() {
if (visible != false) {
synchronized (getTreeLock()) {
visible = false;
ComponentPeer peer = this.peer;
if (peer != null) {
peer.hide();
if (peer instanceof java.awt.peer.LightweightPeer) {
repaint();
}
}
if (componentListener != null ||
(eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0) {
ComponentEvent e = new ComponentEvent(this,
ComponentEvent.COMPONENT_HIDDEN);
Toolkit.getEventQueue().postEvent(e);
}
Container parent = this.parent;
if (parent != null) {
parent.invalidate();
}
}
}
}
/**
* Gets the foreground color of this component.
* @return This component's foreground color. If this component does
* not have a foreground color, the foreground color of its parent
* is returned.
* @see #java.awt.Component#setForeground(java.awt.Color)
* @since JDK1.0
*/
public Color getForeground() {
Color foreground = this.foreground;
if (foreground != null) {
return foreground;
}
Container parent = this.parent;
return (parent != null) ? parent.getForeground() : null;
}
/**
* Sets the foreground color of this component.
* @param <code>c</code> The color to become this component's
* foreground color.
* @see #getForeground
* @since JDK1.0
*/
public void setForeground(Color c) {
ComponentPeer peer = this.peer;
foreground = c;
if (peer != null) {
c = getForeground();
if (c != null) {
peer.setForeground(c);
}
}
}
/**
* Gets the background color of this component.
* @return This component's background color. If this component does
* not have a background color, the background color of its parent
* is returned.
* @see java.awt.Component#setBackground(java.awt.Color)
* @since JDK1.0
*/
public Color getBackground() {
Color background = this.background;
if (background != null) {
return background;
}
Container parent = this.parent;
return (parent != null) ? parent.getBackground() : null;
}
/**
* Sets the background color of this component.
* @param <code>c</code> The color to become this component's
* background color.
* @see #getBackground
* @since JDK1.0
*/
public void setBackground(Color c) {
ComponentPeer peer = this.peer;
background = c;
if (peer != null) {
c = getBackground();
if (c != null) {
peer.setBackground(c);
}
}
}
/**
* Gets the font of this component.
* @return This component's font. If a font has not been set
* for this component, the font of its parent is returned.
* @see #setFont
* @since JDK1.0
*/
public Font getFont() {
Font font = this.font;
if (font != null) {
return font;
}
Container parent = this.parent;
return (parent != null) ? parent.getFont() : null;
}
/**
* Sets the font of this component.
* @param <code>f</code> The font to become this component's font.
* @see #getFont
* @since JDK1.0
*/
public void setFont(Font f) {
synchronized (getTreeLock()) {
ComponentPeer peer = this.peer;
font = f;
if (peer != null) {
f = getFont();
if (f != null) {
peer.setFont(f);
}
}
}
}
/**
* Gets the locale of this component.
* @return This component's locale. If this component does not
* have a locale, the locale of its parent is returned.
* @see #setLocale
* @exception IllegalComponentStateException If the Component
* does not have its own locale and has not yet been added to
* a containment hierarchy such that the locale can be determined
* from the containing parent.
* @since JDK1.1
*/
public Locale getLocale() {
Locale locale = this.locale;
if (locale != null) {
return locale;
}
Container parent = this.parent;
if (parent == null) {
throw new IllegalComponentStateException("This component must have a parent in order to determine its locale");
} else {
return parent.getLocale();
}
}
/**
* Sets the locale of this component.
* @param <code>l</code> The locale to become this component's locale.
* @see #getLocale
* @since JDK1.1
*/
public void setLocale(Locale l) {
locale = l;
}
/**
* Gets the instance of <code>ColorModel</code> used to display
* the component on the output device.
* @return The color model used by this component.
* @see java.awt.image.ColorModel
* @see java.awt.peer.ComponentPeer#getColorModel()
* @see java.awt.Toolkit#getColorModel()
* @since JDK1.0
*/
public ColorModel getColorModel() {
ComponentPeer peer = this.peer;
if ((peer != null) && ! (peer instanceof java.awt.peer.LightweightPeer)) {
return peer.getColorModel();
}
return getToolkit().getColorModel();
}
/**
* Gets the location of this component in the form of a
* point specifying the component's top-left corner.
* The location will be relative to the parent's coordinate space.
* @return An instance of <code>Point</code> representing
* the top-left corner of the component's bounds in the coordinate
* space of the component's parent.
* @see #setLocation
* @see #getLocationOnScreen
* @since JDK1.1
*/
public Point getLocation() {
return location();
}
/**
* Gets the location of this component in the form of a point
* specifying the component's top-left corner in the screen's
* coordinate space.
* @return An instance of <code>Point</code> representing
* the top-left corner of the component's bounds in the
* coordinate space of the screen.
* @see #setLocation
* @see #getLocation
*/
public Point getLocationOnScreen() {
synchronized (getTreeLock()) {
if (peer != null && isShowing()) {
if (peer instanceof java.awt.peer.LightweightPeer) {
// lightweight component location needs to be translated
// relative to a native component.
Container host = getNativeContainer();
Point pt = host.peer.getLocationOnScreen();
for(Component c = this; c != host; c = c.getParent()) {
pt.x += c.x;
pt.y += c.y;
}
return pt;
} else {
Point pt = peer.getLocationOnScreen();
return pt;
}
} else {
throw new IllegalComponentStateException("component must be showing on the screen to determine its location");
}
}
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>getLocation()</code>.
*/
public Point location() {
return new Point(x, y);
}
/**
* Moves this component to a new location. The top-left corner of
* the new location is specified by the <code>x</code> and <code>y</code>
* parameters in the coordinate space of this component's parent.
* @param <code>x</code> The <i>x</i>-coordinate of the new location's
* top-left corner in the parent's coordinate space.
* @param <code>y</code> The <i>y</i>-coordinate of the new location's
* top-left corner in the parent's coordinate space.
* @see #getLocation
* @see #setBounds
* @since JDK1.1
*/
public void setLocation(int x, int y) {
move(x, y);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setLocation(int, int)</code>.
*/
public void move(int x, int y) {
setBounds(x, y, width, height);
}
/**
* Moves this component to a new location. The top-left corner of
* the new location is specified by point <code>p</code>. Point
* <code>p</code> is given in the parent's coordinate space.
* @param <code>p</code> The point defining the top-left corner
* of the new location, given in the coordinate space of this
* component's parent.
* @see #getLocation
* @see #setBounds
* @since JDK1.1
*/
public void setLocation(Point p) {
setLocation(p.x, p.y);
}
/**
* Returns the size of this component in the form of a
* <code>Dimension</code> object. The <code>height</code>
* field of the <code>Dimension</code> object contains
* this component's height, and the <code>width</code>
* field of the <code>Dimension</code> object contains
* this component's width.
* @return A <code>Dimension</code> object that indicates the
* size of this component.
* @see #setSize
* @since JDK1.1
*/
public Dimension getSize() {
return size();
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>getSize()</code>.
*/
public Dimension size() {
return new Dimension(width, height);
}
/**
* Resizes this component so that it has width <code>width</code>
* and <code>height</code>.
* @param <code>width</code> The new width of this component in pixels.
* @param <code>height</code> The new height of this component in pixels.
* @see #getSize
* @see #setBounds
* @since JDK1.1
*/
public void setSize(int width, int height) {
resize(width, height);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setSize(int, int)</code>.
*/
public void resize(int width, int height) {
setBounds(x, y, width, height);
}
/**
* Resizes this component so that it has width <code>d.width</code>
* and height <code>d.height</code>.
* @param <code>d</code> The dimension specifying the new size
* of this component.
* @see #setSize
* @see #setBounds
* @since JDK1.1
*/
public void setSize(Dimension d) {
resize(d);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setSize(Dimension)</code>.
*/
public void resize(Dimension d) {
setSize(d.width, d.height);
}
/**
* Gets the bounds of this component in the form of a
* <code>Rectangle</code> object. The bounds specify this
* component's width, height, and location relative to
* its parent.
* @return A rectangle indicating this component's bounds.
* @see #setBounds
* @see #getLocation
* @see #getSize
*/
public Rectangle getBounds() {
return bounds();
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>getBounds()</code>.
*/
public Rectangle bounds() {
return new Rectangle(x, y, width, height);
}
/**
* Moves and resizes this component. The new location of the top-left
* corner is specified by <code>x</code> and <code>y</code>, and the
* new size is specified by <code>width</code> and <code>height</code>.
* @param <code>x</code> The new <i>x</i>-coordinate of this component.
* @param <code>y</code> The new <i>y</i>-coordinate of this component.
* @param <code>width</code> The new <code>width</code> of this component.
* @param <code>height</code> The new <code>height</code> of this
* component.
* @see java.awt.Component#getBounds
* @see java.awt.Component#setLocation(int, int)
* @see java.awt.Component#setLocation(java.awt.Point)
* @see java.awt.Component#setSize(int, int)
* @see java.awt.Component#setSize(java.awt.Dimension)
* @JDK1.1
*/
public void setBounds(int x, int y, int width, int height) {
reshape(x, y, width, height);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>setBounds(int, int, int, int)</code>.
*/
public void reshape(int x, int y, int width, int height) {
synchronized (getTreeLock()) {
boolean resized = (this.width != width) || (this.height != height);
boolean moved = (this.x != x) || (this.y != y);
if (resized || moved) {
boolean isLightweight =
(peer instanceof java.awt.peer.LightweightPeer);
// Remember the area this component occupied in its parent.
int oldParentX = this.x;
int oldParentY = this.y;
int oldWidth = this.width;
int oldHeight = this.height;
this.x = x;
this.y = y;
this.width = width;
this.height = height;
if (peer != null) {
if (isLightweight) {
peer.setBounds(x, y, width, height);
} else {
// native peer might be offset by more than direct
// parent since parent might be lightweight.
int nativeX = x;
int nativeY = y;
for(Component c = parent; (c != null) &&
(c.peer instanceof java.awt.peer.LightweightPeer);
c = c.parent) {
nativeX += c.x;
nativeY += c.y;
}
peer.setBounds(nativeX, nativeY, width, height);
}
if (resized) {
invalidate();
if (componentListener != null ||
(eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0) {
ComponentEvent e = new ComponentEvent(this,
ComponentEvent.COMPONENT_RESIZED);
Toolkit.getEventQueue().postEvent(e);
}
}
if (moved &&
(componentListener != null ||
(eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0)) {
ComponentEvent e = new ComponentEvent(this,
ComponentEvent.COMPONENT_MOVED);
Toolkit.getEventQueue().postEvent(e);
}
if (parent != null && parent.valid) {
parent.invalidate();
}
}
if (isLightweight && isShowing()) {
// Repaint the old area ...
parent.repaint(oldParentX, oldParentY, oldWidth, oldHeight);
// ... then the new (this areas will be collapsed by
// the ScreenUpdater if they intersect).
repaint();
}
}
}
}
/**
* Moves and resizes this component to conform to the new
* bounding rectangle <code>r</code>. This component's new
* position is specified by <code>r.x</code> and <code>r.y</code>,
* and its new size is specified by <code>r.width</code> and
* <code>r.height</code>
* @param <code>r<code> The new bounding rectangle for this component.
* @see java.awt.Component#getBounds
* @see java.awt.Component#setLocation(int, int)
* @see java.awt.Component#setLocation(java.awt.Point)
* @see java.awt.Component#setSize(int, int)
* @see java.awt.Component#setSize(java.awt.Dimension)
* @since JDK1.1
*/
public void setBounds(Rectangle r) {
setBounds(r.x, r.y, r.width, r.height);
}
/**
* Gets the preferred size of this component.
* @return A dimension object indicating this component's preferred size.
* @see #getMinimumSize
* @see java.awt.LayoutManager
*/
public Dimension getPreferredSize() {
return preferredSize();
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>getPreferredSize()</code>.
*/
public Dimension preferredSize() {
/* Avoid grabbing the lock if a reasonable cached size value
* is available.
*/
Dimension dim = prefSize;
if (dim != null && isValid()) {
return dim;
}
synchronized (getTreeLock()) {
prefSize = (peer != null) ?
peer.preferredSize() :
getMinimumSize();
return prefSize;
}
}
/**
* Gets the mininimum size of this component.
* @return A dimension object indicating this component's minimum size.
* @see #getPreferredSize
* @see java.awtLayoutManager
*/
public Dimension getMinimumSize() {
return minimumSize();
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>getMinimumSize()</code>.
*/
public Dimension minimumSize() {
/* Avoid grabbing the lock if a reasonable cached size value
* is available.
*/
Dimension dim = minSize;
if (dim != null && isValid()) {
return dim;
}
synchronized (getTreeLock()) {
minSize = (peer != null) ?
peer.minimumSize() :
size();
return minSize;
}
}
/**
* Gets the maximum size of this component.
* @return A dimension object indicating this component's maximum size.
* @see #getMinimumSize
* @see #getPreferredSize
* @see LayoutManager
*/
public Dimension getMaximumSize() {
return new Dimension(Short.MAX_VALUE, Short.MAX_VALUE);
}
/**
* Returns the alignment along the x axis. This specifies how
* the component would like to be aligned relative to other
* components. The value should be a number between 0 and 1
* where 0 represents alignment along the origin, 1 is aligned
* the furthest away from the origin, 0.5 is centered, etc.
*/
public float getAlignmentX() {
return CENTER_ALIGNMENT;
}
/**
* Returns the alignment along the y axis. This specifies how
* the component would like to be aligned relative to other
* components. The value should be a number between 0 and 1
* where 0 represents alignment along the origin, 1 is aligned
* the furthest away from the origin, 0.5 is centered, etc.
*/
public float getAlignmentY() {
return CENTER_ALIGNMENT;
}
/**
* Prompts the layout manager to lay out this component. This is
* usually called when the component (more specifically, container)
* is validated.
* @see #validate
* @see LayoutManager
*/
public void doLayout() {
layout();
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>doLayout()</code>.
*/
public void layout() {
}
/**
* Ensures that this component has a valid layout. This method is
* primarily intended to operate on instances of <code>Container</code>.
* @see java.awt.Component#invalidate
* @see java.awt.Component#doLayout()
* @see java.awt.LayoutManager
* @see java.awt.Container#validate
* @since JDK1.0
*/
public void validate() {
if (!valid) {
synchronized (getTreeLock()) {
valid = true;
}
}
}
/**
* Invalidates this component. This component and all parents
* above it are marked as needing to be laid out. This method can
* be called often, so it needs to execute quickly.
* @see java.awt.Component#validate
* @see java.awt.Component#doLayout
* @see java.awt.LayoutManager
* @since JDK1.0
*/
public void invalidate() {
synchronized (getTreeLock()) {
/* Nullify cached layout and size information.
* For efficiency, propagate invalidate() upwards only if
* some other component hasn't already done so first.
*/
valid = false;
prefSize = null;
minSize = null;
if (parent != null && parent.valid) {
parent.invalidate();
}
}
}
/**
* Creates a graphics context for this component. This method will
* return <code>null</code> if this component is currently not on
* the screen.
* @return A graphics context for this component, or <code>null</code>
* if it has none.
* @see java.awt.Component#paint
* @since JDK1.0
*/
public Graphics getGraphics() {
if (peer instanceof java.awt.peer.LightweightPeer) {
// This is for a lightweight component, need to
// translate coordinate spaces and clip relative
// to the parent.
Graphics g = parent.getGraphics();
g.translate(x,y);
g.clipRect(0, 0, width, height);
g.setFont(getFont());
return g;
} else {
ComponentPeer peer = this.peer;
return (peer != null) ? peer.getGraphics() : null;
}
}
/**
* Gets the font metrics for the specified font.
* @param <code>font</code> The font for which font metrics is to be
* obtained.
* @return The font metrics for <code>font</code>.
* @param font the font.
* @return the font metrics for the specified font.
* @see java.awt.Component#getFont
* @see java.awt.Component#getPeer()
* @see java.awt.peer.ComponentPeer#getFontMetrics(java.awt.Font)
* @see java.awt.Toolkit#getFontMetrics(java.awt.Font)
* @since JDK1.0
*/
public FontMetrics getFontMetrics(Font font) {
ComponentPeer peer = this.peer;
if ((peer != null) && ! (peer instanceof java.awt.peer.LightweightPeer)) {
return peer.getFontMetrics(font);
}
return getToolkit().getFontMetrics(font);
}
/**
* Set the cursor image to a predefined cursor.
* @param <code>cursor</code> One of the constants defined
* by the <code>Cursor</code> class. If this parameter is null
* then this component will inherit the cursor of its parent.
* @see java.awt.Component#getCursor
* @see java.awt.Cursor
* @since JDK1.1
*/
public synchronized void setCursor(Cursor cursor) {
this.cursor = cursor;
ComponentPeer peer = this.peer;
if (peer instanceof java.awt.peer.LightweightPeer) {
getNativeContainer().updateCursor(this);
} else if (peer != null) {
peer.setCursor(cursor);
}
}
/**
* Gets the cursor set on this component.
* @return The cursor for this component.
* @see java.awt.Component#setCursor
* @see java.awt.Cursor
* @since JDK1.1
*/
public Cursor getCursor() {
return cursor;
}
/**
* Paints this component. This method is called when the contents
* of the component should be painted in response to the component
* first being shown or damage needing repair. The clip rectangle
* in the Graphics parameter will be set to the area which needs
* to be painted.
* @param <code>g</code> The graphics context to use for painting.
* @see java.awt.Component#update
* @since JDK1.0
*/
public void paint(Graphics g) {
}
/**
* Updates this component.
* <p>
* The AWT calls the <code>update</code> method in response to a
* call to <code>repaint</code. The appearance of the
* component on the screen has not changed since the last call to
* <code>update</code> or <code>paint</code>. You can assume that
* the background is not cleared.
* <p>
* The <code>update</code>method of <code>Component</code>
* does the following:
* <p>
* <blockquote><ul>
* <li>Clears this component by filling it
* with the background color.
* <li>Sets the color of the graphics context to be
* the foreground color of this component.
* <li>Calls this component's <code>paint</code>
* method to completely redraw this component.
* </ul></blockquote>
* <p>
* The origin of the graphics context, its
* (<code>0</code>, <code>0</code>) coordinate point, is the
* top-left corner of this component. The clipping region of the
* graphics context is the bounding rectangle of this component.
* @param g the specified context to use for updating.
* @see java.awt.Component#paint
* @see java.awt.Component#repaint()
* @since JDK1.0
*/
public void update(Graphics g) {
if ((this instanceof java.awt.Canvas) ||
(this instanceof java.awt.Panel) ||
(this instanceof java.awt.Frame) ||
(this instanceof java.awt.Dialog) ||
(this instanceof java.awt.Window)) {
g.setColor(getBackground());
g.fillRect(0, 0, width, height);
g.setColor(getForeground());
}
paint(g);
}
/**
* Paints this component and all of its subcomponents.
* <p>
* The origin of the graphics context, its
* (<code>0</code>, <code>0</code>) coordinate point, is the
* top-left corner of this component. The clipping region of the
* graphics context is the bounding rectangle of this component.
* @param g the graphics context to use for painting.
* @see java.awt.Component#paint
* @since JDK1.0
*/
public void paintAll(Graphics g) {
ComponentPeer peer = this.peer;
if (visible && (peer != null)) {
validate();
if (peer instanceof java.awt.peer.LightweightPeer) {
paint(g);
} else {
peer.paint(g);
}
}
}
/**
* Repaints this component.
* <p>
* This method causes a call to this component's <code>update</code>
* method as soon as possible.
* @see java.awt.Component#update(java.awt.Graphics)
* @since JDK1.0
*/
public void repaint() {
repaint(0, 0, 0, width, height);
}
/**
* Repaints the component. This will result in a
* call to <code>update</code> within <em>tm</em> milliseconds.
* @param tm maximum time in milliseconds before update
* @see #paint
* @see java.awt.Component#update(java.awt.Graphics)
* @since JDK1.0
*/
public void repaint(long tm) {
repaint(tm, 0, 0, width, height);
}
/**
* Repaints the specified rectangle of this component.
* <p>
* This method causes a call to this component's <code>update</code>
* method as soon as possible.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @param width the width.
* @param height the height.
* @see java.awt.Component#update(java.awt.Graphics)
* @since JDK1.0
*/
public void repaint(int x, int y, int width, int height) {
repaint(0, x, y, width, height);
}
/**
* Repaints the specified rectangle of this component within
* <code>tm</code> milliseconds.
* <p>
* This method causes a call to this component's
* <code>update</code> method.
* @param tm maximum time in milliseconds before update.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @param width the width.
* @param height the height.
* @see java.awt.Component#update(java.awt.Graphics)
* @since JDK1.0
*/
public void repaint(long tm, int x, int y, int width, int height) {
if (this.peer instanceof java.awt.peer.LightweightPeer) {
// Needs to be translated to parent coordinates since
// a parent native container provides the actual repaint
// services. Additionally, the request is restricted to
// the bounds of the component.
int px = this.x + ((x < 0) ? 0 : x);
int py = this.y + ((y < 0) ? 0 : y);
int pwidth = (width > this.width) ? this.width : width;
int pheight = (height > this.height) ? this.height : height;
parent.repaint(tm, px, py, pwidth, pheight);
} else {
ComponentPeer peer = this.peer;
if ((peer != null) && (width > 0) && (height > 0)) {
peer.repaint(tm, x, y, width, height);
}
}
}
/**
* Prints this component. Applications should override this method
* for components that must do special processing before being
* printed or should be printed differently than they are painted.
* <p>
* The default implementation of this method calls the
* <code>paint</code> method.
* <p>
* The origin of the graphics context, its
* (<code>0</code>, <code>0</code>) coordinate point, is the
* top-left corner of this component. The clipping region of the
* graphics context is the bounding rectangle of this component.
* @param g the graphics context to use for printing.
* @see java.awt.Component#paint(java.awt.Graphics)
* @since JDK1.0
*/
public void print(Graphics g) {
paint(g);
}
/**
* Prints this component and all of its subcomponents.
* <p>
* The origin of the graphics context, its
* (<code>0</code>, <code>0</code>) coordinate point, is the
* top-left corner of this component. The clipping region of the
* graphics context is the bounding rectangle of this component.
* @param g the graphics context to use for printing.
* @see java.awt.Component#print(java.awt.Graphics)
* @since JDK1.0
*/
public void printAll(Graphics g) {
ComponentPeer peer = this.peer;
if (visible && (peer != null)) {
validate();
Graphics cg = g.create(0, 0, width, height);
cg.setFont(getFont());
try {
if (peer instanceof java.awt.peer.LightweightPeer) {
lightweightPrint(g);
}
else {
peer.print(g);
}
} finally {
cg.dispose();
}
}
}
/**
* Simulates the peer callbacks into java.awt for printing of
* lightweight Components.
* @param g the graphics context to use for printing.
* @see #printAll
*/
void lightweightPrint(Graphics g) {
print(g);
}
/**
* Repaints the component when the image has changed.
* This <code>imageUpdate</code> method of an <code>ImageObserver</code>
* is called when more information about an
* image which had been previously requested using an asynchronous
* routine such as the <code>drawImage</code> method of
* <code>Graphics</code> becomes available.
* See the definition of <code>imageUpdate</code> for
* more information on this method and its arguments.
* <p>
* The <code>imageUpdate</code> method of <code>Component</code>
* incrementally draws an image on the component as more of the bits
* of the image are available.
* <p>
* If the system property <code>awt.image.incrementalDraw</code>
* is missing or has the value <code>true</code>, the image is
* incrementally drawn, If the system property has any other value,
* then the image is not drawn until it has been completely loaded.
* <p>
* Also, if incremental drawing is in effect, the value of the
* system property <code>awt.image.redrawrate</code> is interpreted
* as an integer to give the maximum redraw rate, in milliseconds. If
* the system property is missing or cannot be interpreted as an
* integer, the redraw rate is once every 100ms.
* <p>
* The interpretation of the <code>x</code>, <code>y</code>,
* <code>width</code>, and <code>height</code> arguments depends on
* the value of the <code>infoflags</code> argument.
* @param img the image being observed.
* @param infoflags see <code>imageUpdate</code> for more information.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @param width the width.
* @param height the height.
* @return <code>true</code> if the flags indicate that the
* image is completely loaded;
* <code>false</code> otherwise.
* @see java.awt.image.ImageObserver
* @see java.awt.Graphics#drawImage(java.awt.Image, int, int, java.awt.Color, java.awt.image.ImageObserver)
* @see java.awt.Graphics#drawImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
* @see java.awt.Graphics#drawImage(java.awt.Image, int, int, int, int, java.awt.Color, java.awt.image.ImageObserver)
* @see java.awt.Graphics#drawImage(java.awt.Image, int, int, int, int, java.awt.image.ImageObserver)
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean imageUpdate(Image img, int flags,
int x, int y, int w, int h) {
int rate = -1;
if ((flags & (FRAMEBITS|ALLBITS)) != 0) {
rate = 0;
} else if ((flags & SOMEBITS) != 0) {
if (isInc) {
try {
rate = incRate;
if (rate < 0)
rate = 0;
} catch (Exception e) {
rate = 100;
}
}
}
if (rate >= 0) {
repaint(rate, 0, 0, width, height);
}
return (flags & (ALLBITS|ABORT)) == 0;
}
/**
* Creates an image from the specified image producer.
* @param producer the image producer
* @return the image produced.
* @since JDK1.0
*/
public Image createImage(ImageProducer producer) {
ComponentPeer peer = this.peer;
if ((peer != null) && ! (peer instanceof java.awt.peer.LightweightPeer)) {
return peer.createImage(producer);
}
return getToolkit().createImage(producer);
}
/**
* Creates an off-screen drawable image
* to be used for double buffering.
* @param width the specified width.
* @param height the specified height.
* @return an off-screen drawable image,
* which can be used for double buffering.
* @since JDK1.0
*/
public Image createImage(int width, int height) {
ComponentPeer peer = this.peer;
if (peer instanceof java.awt.peer.LightweightPeer) {
return parent.createImage(width, height);
} else {
return (peer != null) ? peer.createImage(width, height) : null;
}
}
/**
* Prepares an image for rendering on this component. The image
* data is downloaded asynchronously in another thread and the
* appropriate screen representation of the image is generated.
* @param image the <code>Image</code> for which to
* prepare a screen representation.
* @param observer the <code>ImageObserver</code> object
* to be notified as the image is being prepared.
* @return <code>true</code> if the image has already been fully prepared;
<code>false</code> otherwise.
* @since JDK1.0
*/
public boolean prepareImage(Image image, ImageObserver observer) {
return prepareImage(image, -1, -1, observer);
}
/**
* Prepares an image for rendering on this component at the
* specified width and height.
* <p>
* The image data is downloaded asynchronously in another thread,
* and an appropriately scaled screen representation of the image is
* generated.
* @param image the instance of <code>Image</code>
* for which to prepare a screen representation.
* @param width the width of the desired screen representation.
* @param height the height of the desired screen representation.
* @param observer the <code>ImageObserver</code> object
* to be notified as the image is being prepared.
* @return <code>true</code> if the image has already been fully prepared;
<code>false</code> otherwise.
* @see java.awt.image.ImageObserver
* @since JDK1.0
*/
public boolean prepareImage(Image image, int width, int height,
ImageObserver observer) {
ComponentPeer peer = this.peer;
if (peer instanceof java.awt.peer.LightweightPeer) {
return parent.prepareImage(image, width, height, observer);
} else {
return (peer != null)
? peer.prepareImage(image, width, height, observer)
: getToolkit().prepareImage(image, width, height, observer);
}
}
/**
* Returns the status of the construction of a screen representation
* of the specified image.
* <p>
* This method does not cause the image to begin loading. An
* application must use the <code>prepareImage</code> method
* to force the loading of an image.
* <p>
* Information on the flags returned by this method can be found
* with the discussion of the <code>ImageObserver</code> interface.
* @param image the <code>Image</code> object whose status
* is being checked.
* @param observer the <code>ImageObserver</code>
* object to be notified as the image is being prepared.
* @return the bitwise inclusive <b>OR</b> of
* <code>ImageObserver</code> flags indicating what
* information about the image is currently available.
* @see java.awt.Component#prepareImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
* @see java.awt.Toolkit#checkImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
* @see java.awt.image.ImageObserver
* @since JDK1.0
*/
public int checkImage(Image image, ImageObserver observer) {
return checkImage(image, -1, -1, observer);
}
/**
* Returns the status of the construction of a screen representation
* of the specified image.
* <p>
* This method does not cause the image to begin loading. An
* application must use the <code>prepareImage</code> method
* to force the loading of an image.
* <p>
* The <code>checkImage</code> method of <code>Component</code>
* calls its peer's <code>checkImage</code> method to calculate
* the flags. If this component does not yet have a peer, the
* component's toolkit's <code>checkImage</code> method is called
* instead.
* <p>
* Information on the flags returned by this method can be found
* with the discussion of the <code>ImageObserver</code> interface.
* @param image the <code>Image</code> object whose status
* is being checked.
* @param width the width of the scaled version
* whose status is to be checked.
* @param height the height of the scaled version
* whose status is to be checked.
* @param observer the <code>ImageObserver</code> object
* to be notified as the image is being prepared.
* @return the bitwise inclusive <b>OR</b> of
* <code>ImageObserver</code> flags indicating what
* information about the image is currently available.
* @see java.awt.Component#prepareImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
* @see java.awt.Toolkit#checkImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
* @see java.awt.image.ImageObserver#_top_
* @since JDK1.0
*/
public int checkImage(Image image, int width, int height,
ImageObserver observer) {
ComponentPeer peer = this.peer;
if (peer instanceof java.awt.peer.LightweightPeer) {
return parent.checkImage(image, width, height, observer);
} else {
return (peer != null)
? peer.checkImage(image, width, height, observer)
: getToolkit().checkImage(image, width, height, observer);
}
}
/**
* Checks whether this component "contains" the specified point,
* where <code>x</code> and <code>y</code> are defined to be
* relative to the coordinate system of this component.
* @param x the <i>x</i> coordinate of the point.
* @param y the <i>y</i> coordinate of the point.
* @see java.awt.Component#getComponentAt(int, int)
* @since JDK1.1
*/
public boolean contains(int x, int y) {
return inside(x, y);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by contains(int, int).
*/
public boolean inside(int x, int y) {
return (x >= 0) && (x < width) && (y >= 0) && (y < height);
}
/**
* Checks whether this component "contains" the specified point,
* where the point's <i>x</i> and <i>y</i> coordinates are defined
* to be relative to the coordinate system of this component.
* @param p the point.
* @see java.awt.Component#getComponentAt(java.awt.Point)
* @since JDK1.1
*/
public boolean contains(Point p) {
return contains(p.x, p.y);
}
/**
* Determines if this component or one of its immediate
* subcomponents contains the (<i>x</i>, <i>y</i>) location,
* and if so, returns the containing component. This method only
* looks one level deep. If the point (<i>x</i>, <i>y</i>) is
* inside a subcomponent that itself has subcomponents, it does not
* go looking down the subcomponent tree.
* <p>
* The <code>locate</code> method of <code>Component</code> simply
* returns the component itself if the (<i>x</i>, <i>y</i>)
* coordinate location is inside its bounding box, and <code>null</code>
* otherwise.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @return the component or subcomponent that contains the
* (<i>x</i>, <i>y</i>) location;
* <code>null</code> if the location
* is outside this component.
* @see java.awt.Component#contains(int, int)
* @since JDK1.0
*/
public Component getComponentAt(int x, int y) {
return locate(x, y);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by getComponentAt(int, int).
*/
public Component locate(int x, int y) {
return contains(x, y) ? this : null;
}
/**
* Returns the component or subcomponent that contains the
* specified point.
* @param p the point.
* @see java.awt.Component#contains
* @since JDK1.1
*/
public Component getComponentAt(Point p) {
return getComponentAt(p.x, p.y);
}
/**
* @deprecated As of JDK version 1.1,
* replaced by <code>dispatchEvent(AWTEvent e)</code>.
*/
public void deliverEvent(Event e) {
postEvent(e);
}
/**
* Dispatches an event to this component or one of its sub components.
* @param e the event
*/
public final void dispatchEvent(AWTEvent e) {
dispatchEventImpl(e);
}
void dispatchEventImpl(AWTEvent e) {
int id = e.getID();
/*
* 1. Allow input methods to process the event
*/
if (areInputMethodsEnabled()
&& (
// Otherwise, we only pass on low-level events, because
// a) input methods shouldn't know about semantic events
// b) passing on the events takes time
// c) isConsumed() is always true for semantic events.
// We exclude paint events since they may be numerous and shouldn't matter.
(e instanceof ComponentEvent) && !(e instanceof PaintEvent))) {
InputContext inputContext = getInputContext();
if (inputContext != null) {
inputContext.dispatchEvent(e);
if (e.isConsumed()) {
return;
}
}
}
/*
* 2. Pre-process any special events before delivery
*/
switch(id) {
// Handling of the PAINT and UPDATE events is now done in the
// peer's handleEvent() method so the background can be cleared
// selectively for non-native components on Windows only.
// - Fred.Ecks@Eng.sun.com, 1-8-98
case FocusEvent.FOCUS_GAINED:
if (parent != null && !(this instanceof Window)) {
parent.setFocusOwner(this);
}
break;
case KeyEvent.KEY_PRESSED:
case KeyEvent.KEY_RELEASED:
Container p = (Container)((this instanceof Container) ? this : parent);
if (p != null) {
p.preProcessKeyEvent((KeyEvent)e);
if (e.isConsumed()) {
return;
}
}
break;
case MouseEvent.MOUSE_PRESSED:
// requestFocus();
break;
default:
break;
}
/*
* 3. Deliver event for normal processing
*/
if (newEventsOnly) {
// Filtering needs to really be moved to happen at a lower
// level in order to get maximum performance gain; it is
// here temporarily to ensure the API spec is honored.
//
if (eventEnabled(e)) {
processEvent(e);
}
} else if (!(e instanceof MouseEvent && !postsOldMouseEvents())) {
//
// backward compatibility
//
Event olde = e.convertToOld();
if (olde != null) {
int key = olde.key;
int modifiers = olde.modifiers;
postEvent(olde);
if (olde.isConsumed()) {
e.consume();
}
// if target changed key or modifier values, copy them
// back to original event
//
switch(olde.id) {
case Event.KEY_PRESS:
case Event.KEY_RELEASE:
case Event.KEY_ACTION:
case Event.KEY_ACTION_RELEASE:
if (olde.key != key) {
((KeyEvent)e).setKeyChar(olde.getKeyEventChar());
}
if (olde.modifiers != modifiers) {
((KeyEvent)e).setModifiers(olde.modifiers);
}
break;
default:
break;
}
}
}
/*
* 4. If no one has consumed a key event, propagate it
* up the containment hierarchy to ensure that menu shortcuts
* and keyboard traversal will work properly.
*/
if (!e.isConsumed() && e instanceof java.awt.event.KeyEvent) {
Container p = (Container)((this instanceof Container) ? this : parent);
if (p != null) {
p.postProcessKeyEvent((KeyEvent)e);
}
}
/*
* 5. Allow the peer to process the event
*/
if (peer != null) {
peer.handleEvent(e);
}
}
boolean areInputMethodsEnabled() {
// in 1.1.x, we assume input method support is required for all
// components that handle key events. There's no way to tell
// whether they're really interested in character input or just
// in keystrokes.
return (eventMask & AWTEvent.KEY_EVENT_MASK) != 0 || keyListener != null;
}
// REMIND: remove when filtering is handled at lower level
boolean eventEnabled(AWTEvent e) {
switch(e.id) {
case ComponentEvent.COMPONENT_MOVED:
case ComponentEvent.COMPONENT_RESIZED:
case ComponentEvent.COMPONENT_SHOWN:
case ComponentEvent.COMPONENT_HIDDEN:
if ((eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0 ||
componentListener != null) {
return true;
}
break;
case FocusEvent.FOCUS_GAINED:
case FocusEvent.FOCUS_LOST:
if ((eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0 ||
focusListener != null) {
return true;
}
break;
case KeyEvent.KEY_PRESSED:
case KeyEvent.KEY_RELEASED:
case KeyEvent.KEY_TYPED:
if ((eventMask & AWTEvent.KEY_EVENT_MASK) != 0 ||
keyListener != null) {
return true;
}
break;
case MouseEvent.MOUSE_PRESSED:
case MouseEvent.MOUSE_RELEASED:
case MouseEvent.MOUSE_ENTERED:
case MouseEvent.MOUSE_EXITED:
case MouseEvent.MOUSE_CLICKED:
if ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0 ||
mouseListener != null) {
return true;
}
break;
case MouseEvent.MOUSE_MOVED:
case MouseEvent.MOUSE_DRAGGED:
if ((eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0 ||
mouseMotionListener != null) {
return true;
}
break;
default:
break;
}
//
// Always pass on events defined by external programs.
//
if (e.id > AWTEvent.RESERVED_ID_MAX) {
return true;
}
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by dispatchEvent(AWTEvent).
*/
public boolean postEvent(Event e) {
ComponentPeer peer = this.peer;
if (handleEvent(e)) {
e.consume();
return true;
}
Component parent = this.parent;
int eventx = e.x;
int eventy = e.y;
if (parent != null) {
e.translate(x, y);
if (parent.postEvent(e)) {
e.consume();
return true;
}
// restore coords
e.x = eventx;
e.y = eventy;
}
return false;
}
// Event source interfaces
/**
* Adds the specified component listener to receive component events from
* this component.
* @param l the component listener.
* @see java.awt.event.ComponentEvent
* @see java.awt.event.ComponentListener
* @see java.awt.Component#removeComponentListener
* @since JDK1.1
*/
public synchronized void addComponentListener(ComponentListener l) {
componentListener = AWTEventMulticaster.add(componentListener, l);
newEventsOnly = true;
}
/**
* Removes the specified component listener so that it no longer
* receives component events from this component.
* @param l the component listener.
* @see java.awt.event.ComponentEvent
* @see java.awt.event.ComponentListener
* @see java.awt.Component#addComponentListener
* @since JDK1.1
*/
public synchronized void removeComponentListener(ComponentListener l) {
componentListener = AWTEventMulticaster.remove(componentListener, l);
}
/**
* Adds the specified focus listener to receive focus events from
* this component.
* @param l the focus listener.
* @see java.awt.event.FocusEvent
* @see java.awt.event.FocusListener
* @see java.awt.Component#removeFocusListener
* @since JDK1.1
*/
public synchronized void addFocusListener(FocusListener l) {
focusListener = AWTEventMulticaster.add(focusListener, l);
newEventsOnly = true;
// if this is a lightweight component, enable focus events
// in the native container.
if (peer instanceof java.awt.peer.LightweightPeer) {
parent.proxyEnableEvents(AWTEvent.FOCUS_EVENT_MASK);
}
}
/**
* Removes the specified focus listener so that it no longer
* receives focus events from this component.
* @param l the focus listener.
* @see java.awt.event.FocusEvent
* @see java.awt.event.FocusListener
* @see java.awt.Component#addFocusListener
* @since JDK1.1
*/
public synchronized void removeFocusListener(FocusListener l) {
focusListener = AWTEventMulticaster.remove(focusListener, l);
}
/**
* Adds the specified key listener to receive key events from
* this component.
* @param l the key listener.
* @see java.awt.event.KeyEvent
* @see java.awt.event.KeyListener
* @see java.awt.Component#removeKeyListener
* @since JDK1.1
*/
public synchronized void addKeyListener(KeyListener l) {
keyListener = AWTEventMulticaster.add(keyListener, l);
newEventsOnly = true;
// if this is a lightweight component, enable key events
// in the native container.
if (peer instanceof java.awt.peer.LightweightPeer) {
parent.proxyEnableEvents(AWTEvent.KEY_EVENT_MASK);
}
}
/**
* Removes the specified key listener so that it no longer
* receives key events from this component.
* @param l the key listener.
* @see java.awt.event.KeyEvent
* @see java.awt.event.KeyListener
* @see java.awt.Component#addKeyListener
* @since JDK1.1
*/
public synchronized void removeKeyListener(KeyListener l) {
keyListener = AWTEventMulticaster.remove(keyListener, l);
}
/**
* Adds the specified mouse listener to receive mouse events from
* this component.
* @param l the mouse listener.
* @see java.awt.event.MouseEvent
* @see java.awt.event.MouseListener
* @see java.awt.Component#removeMouseListener
* @since JDK1.1
*/
public synchronized void addMouseListener(MouseListener l) {
mouseListener = AWTEventMulticaster.add(mouseListener,l);
newEventsOnly = true;
// if this is a lightweight component, enable mouse events
// in the native container.
if (peer instanceof java.awt.peer.LightweightPeer) {
parent.proxyEnableEvents(AWTEvent.MOUSE_EVENT_MASK);
}
}
/**
* Removes the specified mouse listener so that it no longer
* receives mouse events from this component.
* @param l the mouse listener.
* @see java.awt.event.MouseEvent
* @see java.awt.event.MouseListener
* @see java.awt.Component#addMouseListener
* @since JDK1.1
*/
public synchronized void removeMouseListener(MouseListener l) {
mouseListener = AWTEventMulticaster.remove(mouseListener, l);
}
/**
* Adds the specified mouse motion listener to receive mouse motion events from
* this component.
* @param l the mouse motion listener.
* @see java.awt.event.MouseMotionEvent
* @see java.awt.event.MouseMotionListener
* @see java.awt.Component#removeMouseMotionListener
* @since JDK1.1
*/
public synchronized void addMouseMotionListener(MouseMotionListener l) {
mouseMotionListener = AWTEventMulticaster.add(mouseMotionListener,l);
newEventsOnly = true;
// if this is a lightweight component, enable mouse events
// in the native container.
if (peer instanceof java.awt.peer.LightweightPeer) {
parent.proxyEnableEvents(AWTEvent.MOUSE_MOTION_EVENT_MASK);
}
}
/**
* Removes the specified mouse motion listener so that it no longer
* receives mouse motion events from this component.
* @param l the mouse motion listener.
* @see java.awt.event.MouseMotionEvent
* @see java.awt.event.MouseMotionListener
* @see java.awt.Component#addMouseMotionListener
* @since JDK1.1
*/
public synchronized void removeMouseMotionListener(MouseMotionListener l) {
mouseMotionListener = AWTEventMulticaster.remove(mouseMotionListener, l);
}
/**
* Gets the input context used by this component for handling the communication
* with input methods when text is entered in this component. By default, the
* input context used for the parent component is returned. Components may
* override this to return a private input context.
*
* @return The input context used by this component. Null if no context can
* be determined.
*/
InputContext getInputContext() {
Container parent = this.parent;
if (parent == null) {
return null;
} else {
return parent.getInputContext();
}
}
/**
* Enables the events defined by the specified event mask parameter
* to be delivered to this component.
* <p>
* Event types are automatically enabled when a listener for
* that event type is added to the component.
* <p>
* This method only needs to be invoked by subclasses of
* <code>Component</code> which desire to have the specified event
* types delivered to <code>processEvent</code> regardless of whether
* or not a listener is registered.
* @param eventsToEnable the event mask defining the event types.
* @see java.awt.Component#processEvent
* @see java.awt.Component#disableEvents
* @since JDK1.1
*/
protected final void enableEvents(long eventsToEnable) {
eventMask |= eventsToEnable;
newEventsOnly = true;
// if this is a lightweight component, enable mouse events
// in the native container.
if (peer instanceof java.awt.peer.LightweightPeer) {
parent.proxyEnableEvents(eventMask);
}
}
/**
* Disables the events defined by the specified event mask parameter
* from being delivered to this component.
* @param eventsToDisable the event mask defining the event types
* @see java.awt.Component#enableEvents
* @since JDK1.1
*/
protected final void disableEvents(long eventsToDisable) {
eventMask &= ~eventsToDisable;
}
/**
* Processes events occurring on this component. By default this
* method calls the appropriate
* <code>process<event type>Event</code>
* method for the given class of event.
* @param e the event.
* @see java.awt.Component#processComponentEvent
* @see java.awt.Component#processFocusEvent
* @see java.awt.Component#processKeyEvent
* @see java.awt.Component#processMouseEvent
* @see java.awt.Component#processMouseMotionEvent
* @since JDK1.1
*/
protected void processEvent(AWTEvent e) {
//System.err.println("Component.processNewEvent:" + e);
if (e instanceof FocusEvent) {
processFocusEvent((FocusEvent)e);
} else if (e instanceof MouseEvent) {
switch(e.getID()) {
case MouseEvent.MOUSE_PRESSED:
case MouseEvent.MOUSE_RELEASED:
case MouseEvent.MOUSE_CLICKED:
case MouseEvent.MOUSE_ENTERED:
case MouseEvent.MOUSE_EXITED:
processMouseEvent((MouseEvent)e);
break;
case MouseEvent.MOUSE_MOVED:
case MouseEvent.MOUSE_DRAGGED:
processMouseMotionEvent((MouseEvent)e);
break;
}
} else if (e instanceof KeyEvent) {
processKeyEvent((KeyEvent)e);
} else if (e instanceof ComponentEvent) {
processComponentEvent((ComponentEvent)e);
}
}
/**
* Processes component events occurring on this component by
* dispatching them to any registered
* <code>ComponentListener</code> objects.
* <p>
* This method is not called unless component events are
* enabled for this component. Component events are enabled
* when one of the following occurs:
* <p><ul>
* <li>A <code>ComponentListener</code> object is registered
* via <code>addComponentListener</code>.
* <li>Component events are enabled via <code>enableEvents</code>.
* </ul>
* @param e the component event.
* @see java.awt.event.ComponentEvent
* @see java.awt.event.ComponentListener
* @see java.awt.Component#addComponentListener
* @see java.awt.Component#enableEvents
* @since JDK1.1
*/
protected void processComponentEvent(ComponentEvent e) {
if (componentListener != null) {
int id = e.getID();
switch(id) {
case ComponentEvent.COMPONENT_RESIZED:
componentListener.componentResized(e);
break;
case ComponentEvent.COMPONENT_MOVED:
componentListener.componentMoved(e);
break;
case ComponentEvent.COMPONENT_SHOWN:
componentListener.componentShown(e);
break;
case ComponentEvent.COMPONENT_HIDDEN:
componentListener.componentHidden(e);
break;
}
}
}
/**
* Processes focus events occurring on this component by
* dispatching them to any registered
* <code>FocusListener</code> objects.
* <p>
* This method is not called unless focus events are
* enabled for this component. Focus events are enabled
* when one of the following occurs:
* <p><ul>
* <li>A <code>FocusListener</code> object is registered
* via <code>addFocusListener</code>.
* <li>Focus events are enabled via <code>enableEvents</code>.
* </ul>
* @param e the focus event.
* @see java.awt.event.FocusEvent
* @see java.awt.event.FocusListener
* @see java.awt.Component#addFocusListener
* @see java.awt.Component#enableEvents
* @since JDK1.1
*/
protected void processFocusEvent(FocusEvent e) {
if (focusListener != null) {
int id = e.getID();
switch(id) {
case FocusEvent.FOCUS_GAINED:
focusListener.focusGained(e);
break;
case FocusEvent.FOCUS_LOST:
focusListener.focusLost(e);
break;
}
}
}
/**
* Processes key events occurring on this component by
* dispatching them to any registered
* <codeKeyListener</code> objects.
* <p>
* This method is not called unless key events are
* enabled for this component. Key events are enabled
* when one of the following occurs:
* <p><ul>
* <li>A <code>KeyListener</code> object is registered
* via <code>addKeyListener</code>.
* <li>Key events are enabled via <code>enableEvents</code>.
* </ul>
* @param e the key event.
* @see java.awt.event.KeyEvent
* @see java.awt.event.KeyListener
* @see java.awt.Component#addKeyListener
* @see java.awt.Component#enableEvents
* @since JDK1.1
*/
protected void processKeyEvent(KeyEvent e) {
if (keyListener != null) {
int id = e.getID();
switch(id) {
case KeyEvent.KEY_TYPED:
keyListener.keyTyped(e);
break;
case KeyEvent.KEY_PRESSED:
keyListener.keyPressed(e);
break;
case KeyEvent.KEY_RELEASED:
keyListener.keyReleased(e);
break;
}
}
}
/**
* Processes mouse events occurring on this component by
* dispatching them to any registered
* <code>MouseListener</code> objects.
* <p>
* This method is not called unless mouse events are
* enabled for this component. Mouse events are enabled
* when one of the following occurs:
* <p><ul>
* <li>A <code>MouseListener</code> object is registered
* via <code>addMouseListener</code>.
* <li>Mouse events are enabled via <code>enableEvents</code>.
* </ul>
* @param e the mouse event.
* @see java.awt.event.MouseEvent
* @see java.awt.event.MouseListener
* @see java.awt.Component#addMouseListener
* @see java.awt.Component#enableEvents
* @since JDK1.1
*/
protected void processMouseEvent(MouseEvent e) {
if (mouseListener != null) {
int id = e.getID();
switch(id) {
case MouseEvent.MOUSE_PRESSED:
mouseListener.mousePressed(e);
break;
case MouseEvent.MOUSE_RELEASED:
mouseListener.mouseReleased(e);
break;
case MouseEvent.MOUSE_CLICKED:
mouseListener.mouseClicked(e);
break;
case MouseEvent.MOUSE_EXITED:
mouseListener.mouseExited(e);
break;
case MouseEvent.MOUSE_ENTERED:
mouseListener.mouseEntered(e);
break;
}
}
}
/**
* Processes mouse motion events occurring on this component by
* dispatching them to any registered
* <code>MouseMotionListener</code> objects.
* <p>
* This method is not called unless mouse motion events are
* enabled for this component. Mouse motion events are enabled
* when one of the following occurs:
* <p><ul>
* <li>A <code>MouseMotionListener</code> object is registered
* via <code>addMouseMotionListener</code>.
* <li>Mouse motion events are enabled via <code>enableEvents</code>.
* </ul>
* @param e the mouse motion event.
* @see java.awt.event.MouseMotionEvent
* @see java.awt.event.MouseMotionListener
* @see java.awt.Component#addMouseMotionListener
* @see java.awt.Component#enableEvents
* @since JDK1.1
*/
protected void processMouseMotionEvent(MouseEvent e) {
if (mouseMotionListener != null) {
int id = e.getID();
switch(id) {
case MouseEvent.MOUSE_MOVED:
mouseMotionListener.mouseMoved(e);
break;
case MouseEvent.MOUSE_DRAGGED:
mouseMotionListener.mouseDragged(e);
break;
}
}
}
boolean postsOldMouseEvents() {
return false;
}
/**
* @deprecated As of JDK version 1.1
* replaced by processEvent(AWTEvent).
*/
public boolean handleEvent(Event evt) {
switch (evt.id) {
case Event.MOUSE_ENTER:
return mouseEnter(evt, evt.x, evt.y);
case Event.MOUSE_EXIT:
return mouseExit(evt, evt.x, evt.y);
case Event.MOUSE_MOVE:
return mouseMove(evt, evt.x, evt.y);
case Event.MOUSE_DOWN:
return mouseDown(evt, evt.x, evt.y);
case Event.MOUSE_DRAG:
return mouseDrag(evt, evt.x, evt.y);
case Event.MOUSE_UP:
return mouseUp(evt, evt.x, evt.y);
case Event.KEY_PRESS:
case Event.KEY_ACTION:
return keyDown(evt, evt.key);
case Event.KEY_RELEASE:
case Event.KEY_ACTION_RELEASE:
return keyUp(evt, evt.key);
case Event.ACTION_EVENT:
return action(evt, evt.arg);
case Event.GOT_FOCUS:
return gotFocus(evt, evt.arg);
case Event.LOST_FOCUS:
return lostFocus(evt, evt.arg);
}
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processMouseEvent(MouseEvent).
*/
public boolean mouseDown(Event evt, int x, int y) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processMouseMotionEvent(MouseEvent).
*/
public boolean mouseDrag(Event evt, int x, int y) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processMouseEvent(MouseEvent).
*/
public boolean mouseUp(Event evt, int x, int y) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processMouseMotionEvent(MouseEvent).
*/
public boolean mouseMove(Event evt, int x, int y) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processMouseEvent(MouseEvent).
*/
public boolean mouseEnter(Event evt, int x, int y) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processMouseEvent(MouseEvent).
*/
public boolean mouseExit(Event evt, int x, int y) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processKeyEvent(KeyEvent).
*/
public boolean keyDown(Event evt, int key) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processKeyEvent(KeyEvent).
*/
public boolean keyUp(Event evt, int key) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* should register this component as ActionListener on component
* which fires action events.
*/
public boolean action(Event evt, Object what) {
return false;
}
/**
* Notifies this component that it has been added to a container
* and if a peer is required, it should be created.
* This method should be called by <code>Container.add</code>, and
* not by user code directly.
* @see #removeNotify
* @since JDK1.0
*/
public void addNotify() {
synchronized (getTreeLock()) {
if (peer == null || peer instanceof java.awt.peer.LightweightPeer){
if (peer == null) {
peer = getToolkit().createComponent(this);
}
// This is a lightweight component which means it won't be
// able to get window-related events by itself. If any
// have been enabled, then the nearest native container must
// be enabled.
long mask = 0;
if ((mouseListener != null) || ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0)) {
mask |= AWTEvent.MOUSE_EVENT_MASK;
}
if ((mouseMotionListener != null) ||
((eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0)) {
mask |= AWTEvent.MOUSE_MOTION_EVENT_MASK;
}
if (focusListener != null || (eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0) {
mask |= AWTEvent.FOCUS_EVENT_MASK;
}
if (keyListener != null || (eventMask & AWTEvent.KEY_EVENT_MASK) != 0) {
mask |= AWTEvent.KEY_EVENT_MASK;
}
if (mask != 0) {
parent.proxyEnableEvents(mask);
}
} else {
// It's native. If the parent is lightweight it
// will need some help.
if (parent != null && parent.peer instanceof java.awt.peer.LightweightPeer) {
new NativeInLightFixer();
}
}
invalidate();
int npopups = (popups != null? popups.size() : 0);
for (int i = 0 ; i < npopups ; i++) {
PopupMenu popup = (PopupMenu)popups.elementAt(i);
popup.addNotify();
}
for (Component p = getParent(); p != null; p = p.getParent()) {
if (p instanceof Window) {
if (((Window)p).getWarningString() == null) {
//!CQ set newEventsOnly if appropriate/possible?
}
break;
}
}
}
}
/**
* Notifies this component that it has been removed from its
* container and if a peers exists, it destroys it.
* This method should be called by <code>Container.remove</code>,
* and not by user code directly.
* @see #addNotify
*/
public void removeNotify() {
synchronized (getTreeLock()) {
if (areInputMethodsEnabled()){
InputContext inputContext = getInputContext();
if (inputContext != null) {
ComponentEvent e = new ComponentEvent(this,
ComponentEvent.COMPONENT_HIDDEN);
inputContext.dispatchEvent(e);
}
}
int npopups = (popups != null? popups.size() : 0);
for (int i = 0 ; i < npopups ; i++) {
PopupMenu popup = (PopupMenu)popups.elementAt(i);
popup.removeNotify();
}
if (peer != null) {
ComponentPeer p = peer;
if (visible) {
p.hide(); // Hide peer first to stop system events such as cursor moves.
}
peer = null; // Stop peer updates.
Toolkit.getEventQueue().removeSourceEvents(this);
p.dispose();
}
}
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processFocusEvent(FocusEvent).
*/
public boolean gotFocus(Event evt, Object what) {
return false;
}
/**
* @deprecated As of JDK version 1.1,
* replaced by processFocusEvent(FocusEvent).
*/
public boolean lostFocus(Event evt, Object what) {
return false;
}
/**
* Returns the value of a flag that indicates whether
* this component can be traversed using
* Tab or Shift-Tab keyboard focus traversal. If this method
* returns "false", this component may still request the keyboard
* focus using <code>requestFocus()</code>, but it will not automatically
* be assigned focus during tab traversal.
* @return <code>true</code> if this component is
* focus-traverable; <code>false</code> otherwise.
* @since JDK1.1
*/
public boolean isFocusTraversable() {
ComponentPeer peer = this.peer;
if (peer != null) {
return peer.isFocusTraversable();
}
return false;
}
/**
* Requests that this component get the input focus.
* <p>
* This component's <code>gotFocus</code> method is called when this
* method is successful. The component must be visible
* on the screen for this request to be granted
* @see FocusEvent
* @see #addFocusListener
* @see #processFocusEvent
* @see #isFocusTraversable
* @since JDK1.0
*/
public void requestFocus() {
ComponentPeer peer = this.peer;
if (peer != null) {
if (peer instanceof java.awt.peer.LightweightPeer) {
parent.proxyRequestFocus(this);
} else {
peer.requestFocus();
Toolkit.getEventQueue().changeKeyEventFocus(this);
}
}
}
/**
* Transfers the focus to the next component.
* @see java.awt.Component#requestFocus
* @see java.awt.Component#gotFocus
* @since JDK1.1s
*/
public void transferFocus() {
nextFocus();
}
/**
* @deprecated As of JDK version 1.1,
* replaced by transferFocus().
*/
public void nextFocus() {
Container parent = this.parent;
if (parent != null) {
parent.transferFocus(this);
}
}
/**
* Adds the specified popup menu to the component.
* @param popup the popup menu to be added to the component.
* @see java.awt.Component#remove(java.awt.MenuComponent)
* @since JDK1.1
*/
public synchronized void add(PopupMenu popup) {
if (popup.parent != null) {
popup.parent.remove(popup);
}
if (popups == null) {
popups = new Vector();
}
popups.addElement(popup);
popup.parent = this;
if (peer != null) {
if (popup.peer == null) {
popup.addNotify();
}
}
}
/**
* Removes the specified popup menu from the component.
* @param popup the popup menu to be removed.
* @see java.awt.Component#add(java.awt.PopupMenu)
* @since JDK1.1
*/
public synchronized void remove(MenuComponent popup) {
if (popups != null) {
int index = popups.indexOf(popup);
if (index >= 0) {
PopupMenu pmenu = (PopupMenu)popup;
if (pmenu.peer != null) {
pmenu.removeNotify();
}
pmenu.parent = null;
popups.removeElementAt(index);
if (popups.size() == 0) {
popups = null;
}
}
}
}
/**
* Returns the parameter string representing the state of this
* component. This string is useful for debugging.
* @return the parameter string of this component.
* @since JDK1.0
*/
protected String paramString() {
String thisName = getName();
String str = (thisName != null? thisName : "") + "," + x + "," + y + "," + width + "x" + height;
if (!valid) {
str += ",invalid";
}
if (!visible) {
str += ",hidden";
}
if (!enabled) {
str += ",disabled";
}
return str;
}
/**
* Returns a string representation of this component and its values.
* @return a string representation of this component.
* @since JDK1.0
*/
public String toString() {
return getClass().getName() + "[" + paramString() + "]";
}
/**
* Prints a listing of this component to the standard system output
* stream <code>System.out</code>.
* @see java.lang.System#out
* @since JDK1.0
*/
public void list() {
list(System.out, 0);
}
/**
* Prints a listing of this component to the specified output
* stream.
* @param out a print stream.
* @since JDK1.0
*/
public void list(PrintStream out) {
list(out, 0);
}
/**
* Prints out a list, starting at the specified indention, to the
* specified print stream.
* @param out a print stream.
* @param indent number of spaces to indent.
* @see java.io.PrintStream#println(java.lang.Object)
* @since JDK1.0
*/
public void list(PrintStream out, int indent) {
for (int i = 0 ; i < indent ; i++) {
out.print(" ");
}
out.println(this);
}
/**
* Prints a listing to the specified print writer.
* @param out The print writer to print to.
* @since JDK1.1
*/
public void list(PrintWriter out) {
list(out, 0);
}
/**
* Prints out a list, starting at the specified indention, to
* the specified print writer.
* @param out The print writer to print to.
* @param indent The number of spaces to indent.
* @see java.io.PrintStream#println(java.lang.Object)
* @since JDK1.1
*/
public void list(PrintWriter out, int indent) {
for (int i = 0 ; i < indent ; i++) {
out.print(" ");
}
out.println(this);
}
/*
* Fetch the native container somewhere higher up in the component
* tree that contains this component.
*/
Container getNativeContainer() {
Container p = parent;
while (p != null && p.peer instanceof java.awt.peer.LightweightPeer) {
p = p.getParent();
}
return p;
}
/* Serialization support.
*/
private int componentSerializedDataVersion = 1;
private void writeObject(ObjectOutputStream s)
throws IOException
{
s.defaultWriteObject();
AWTEventMulticaster.save(s, componentListenerK, componentListener);
AWTEventMulticaster.save(s, focusListenerK, focusListener);
AWTEventMulticaster.save(s, keyListenerK, keyListener);
AWTEventMulticaster.save(s, mouseListenerK, mouseListener);
AWTEventMulticaster.save(s, mouseMotionListenerK, mouseMotionListener);
s.writeObject(null);
}
private void readObject(ObjectInputStream s)
throws ClassNotFoundException, IOException
{
s.defaultReadObject();
Object keyOrNull;
while(null != (keyOrNull = s.readObject())) {
String key = ((String)keyOrNull).intern();
if (componentListenerK == key)
addComponentListener((ComponentListener)(s.readObject()));
else if (focusListenerK == key)
addFocusListener((FocusListener)(s.readObject()));
else if (keyListenerK == key)
addKeyListener((KeyListener)(s.readObject()));
else if (mouseListenerK == key)
addMouseListener((MouseListener)(s.readObject()));
else if (mouseMotionListenerK == key)
addMouseMotionListener((MouseMotionListener)(s.readObject()));
else // skip value for unrecognized key
s.readObject();
}
if (popups != null) {
int npopups = popups.size();
for (int i = 0 ; i < npopups ; i++) {
PopupMenu popup = (PopupMenu)popups.elementAt(i);
popup.parent = this;
}
}
}
/**
* This odd class is to help out a native component that has been
* embedded in a lightweight component. Moving lightweight
* components around and changing their visibility is not seen
* by the native window system. This is a feature for lightweights,
* but a problem for native components that depend upon the
* lightweights. An instance of this class listens to the lightweight
* parents of an associated native component (the outer class).
*
* @author Timothy Prinzing
*/
private final class NativeInLightFixer implements ComponentListener, ContainerListener {
NativeInLightFixer() {
lightParents = new Vector();
Container p = parent;
// stash a reference to the components that are being observed so that
// we can reliably remove ourself as a listener later.
for (; p.peer instanceof java.awt.peer.LightweightPeer; p = p.parent) {
// register listeners and stash a reference
p.addComponentListener(this);
p.addContainerListener(this);
lightParents.addElement(p);
}
// register with the native host (native parent of associated native)
// to get notified if the top-level lightweight is removed.
nativeHost = p;
p.addContainerListener(this);
// kick start the fixup. Since the event isn't looked at
// we can simulate movement notification.
componentMoved(null);
}
// --- ComponentListener -------------------------------------------
/**
* Invoked when one of the lightweight parents has been resized.
* This doesn't change the position of the native child so it
* is ignored.
*/
public void componentResized(ComponentEvent e) {
}
/**
* Invoked when one of the lightweight parents has been moved.
* The native peer must be told of the new position which is
* relative to the native container that is hosting the
* lightweight components.
*/
public void componentMoved(ComponentEvent e) {
synchronized (getTreeLock()) {
int nativeX = x;
int nativeY = y;
for(Component c = parent; (c != null) &&
(c.peer instanceof java.awt.peer.LightweightPeer);
c = c.parent) {
nativeX += c.x;
nativeY += c.y;
}
if (peer != null) {
peer.setBounds(nativeX, nativeY, width, height);
}
}
}
/**
* Invoked when a lightweight parent component has been
* shown. The associated native component must also be
* shown if it hasn't had an overriding hide done on it.
*/
public void componentShown(ComponentEvent e) {
if (isShowing()) {
synchronized (getTreeLock()) {
if (peer != null) {
peer.show();
}
}
}
}
/**
* Invoked when component has been hidden.
*/
public void componentHidden(ComponentEvent e) {
if (visible) {
synchronized (getTreeLock()) {
if (peer != null) {
peer.hide();
}
}
}
}
// --- ContainerListener ------------------------------------
/**
* Invoked when a component has been added to a lightweight
* parent. This doesn't effect the native component.
*/
public void componentAdded(ContainerEvent e) {
}
/**
* Invoked when a lightweight parent has been removed.
* This means the services of this listener are no longer
* required and it should remove all references (ie
* registered listeners).
*/
public void componentRemoved(ContainerEvent e) {
Component c = e.getChild();
if (c == Component.this) {
removeReferences();
} else {
int n = lightParents.size();
for (int i = 0; i < n; i++) {
Container p = (Container) lightParents.elementAt(i);
if (p == c) {
removeReferences();
break;
}
}
}
}
/**
* Remove references to this object so it can be
* garbage collected.
*/
void removeReferences() {
int n = lightParents.size();
for (int i = 0; i < n; i++) {
Container c = (Container) lightParents.elementAt(i);
c.removeComponentListener(this);
c.removeContainerListener(this);
}
nativeHost.removeContainerListener(this);
}
Vector lightParents;
Container nativeHost;
}
}
⏎ java/awt/Component.java
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