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TextField.java: Replaced with Classpath version.

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* java/awt/TextField.java: Replaced with Classpath version.
	* java/awt/TextArea.java: Replaced with Classpath version.
	* java/awt/TextComponent.java: Replaced with Classpath version.

From-SVN: r49113
This commit is contained in:
Tom Tromey 2002-01-23 00:07:39 +00:00 • committed by Tom Tromey
parent d0c9db3079
commit 956e776dd2
4 changed files with 1414 additions and 83 deletions
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4
libjava/ChangeLog
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@ -1,5 +1,9 @@
2002-01-22 Tom Tromey <tromey@redhat.com> 2002-01-22 Tom Tromey <tromey@redhat.com>
* java/awt/TextField.java: Replaced with Classpath version.
* java/awt/TextArea.java: Replaced with Classpath version.
* java/awt/TextComponent.java: Replaced with Classpath version.
* java/awt/GridBagConstraints.java: Updated copyright. * java/awt/GridBagConstraints.java: Updated copyright.
2002-01-22 Mark Wielaard <mark@klomp.org> 2002-01-22 Mark Wielaard <mark@klomp.org>

578
libjava/java/awt/TextArea.java
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@ -1,49 +1,549 @@
/* Copyright (C) 1999 Free Software Foundation /* TextArea.java -- A multi-line text entry widget
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of libjava. 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. */
This software is copyrighted work licensed under the terms of the
Libjava License. Please consult the file "LIBJAVA_LICENSE" for
details. */
package java.awt; package java.awt;
/* A very incomplete placeholder. */ import java.awt.peer.TextAreaPeer;
import java.awt.peer.TextComponentPeer;
import java.awt.peer.ComponentPeer;
public class TextArea extends TextComponent /**
* This implements a multi-line text entry widget.
*
* @author Aaron M. Renn (arenn@urbanophile.com)
*/
public class TextArea extends TextComponent implements java.io.Serializable
{ {
public synchronized void append (String str)
{
replaceRange(str, length, length);
}
public synchronized void insert (String str, int pos) /*
{ * Static Variables
replaceRange(str, pos, pos); */
}
public synchronized void replaceRange (String str, int start, int end) /**
{ * Use both horiztonal and vertical scroll bars.
if (length == 0) */
setText (str); public static final int SCROLLBARS_BOTH = 0;
else
{ /**
int len = str.length(); * Use vertical scroll bars only.
int delta = len - (end - start); */
int new_length = length + delta; public static final int SCROLLBARS_VERTICAL_ONLY = 1;
if (buffer.length < new_length)
{ /**
int new_size = 2 * buffer.length; * Use horizatonal scroll bars only.
if (new_size < new_length) */
new_size = new_length; public static final int SCROLLBARS_HORIZONTAL_ONLY = 2;
char[] new_buffer = new char[new_size];
System.arraycopy(buffer, 0, new_buffer, 0, length); /**
buffer = new_buffer; * Use no scrollbars.
} */
if (len != end) public static final int SCROLLBARS_NONE = 3;
System.arraycopy(buffer, start, buffer, start + len, len - end);
str.getChars(0, len, buffer, start); // Serialization constant
length += delta; private static final long serialVersionUID = 3692302836626095722L;
}
} /*************************************************************************/
/*
* Instance Variables
*/
/**
* @serial The number of columns in this text area.
*/
private int columns;
/**
* @serial The number of rows in this text area.
*/
private int rows;
/**
* @serial The type of scrollbars to display, which will be one of
* the contstants from this class.
*/
private int scrollbarVisibility;
/*************************************************************************/
/*
* Constructors
*/
/**
* Initialize a new instance of <code>TextArea</code> that is empty
* and is one row and one column. Both horizontal and vertical
* scrollbars will be used.
*/
public
TextArea()
{
this("", 1, 1, SCROLLBARS_BOTH);
} }
/*************************************************************************/
/**
* Initializes a new instance of <code>TextArea</code> that
* contains the specified string. Both horizontal and veritcal
* scrollbars will be used.
*
* @param text The text to display in this text area.
*/
public
TextArea(String text)
{
this(text, 1, text.length(), SCROLLBARS_BOTH);
}
/*************************************************************************/
/**
* Initializes a new instance of <code>TextArea</code> that is empty
* and has the specified number of rows and columns. Both
* horizontal and vertical scrollbars will be used.
*
* @param rows The number of rows in this text area.
* @param columns The number of columns in this text area.
*/
public
TextArea(int rows, int columns)
{
this("", rows, columns, SCROLLBARS_BOTH);
}
/*************************************************************************/
/**
* Initializes a new instance of <code>TextArea</code> that is the
* specified size and has the specified text.
*
* @param text The text to display in this text area.
* @param rows The number of rows in this text area.
* @param columns The number of columns in this text area.
*/
public
TextArea(String text, int rows, int columns)
{
this(text, rows, columns, SCROLLBARS_BOTH);
}
/*************************************************************************/
/**
* Initializes a new instance of <code>TextArea</code> with the
* specified values. The scrollbar visibility value must be one
* of the constants in this class.
*
* @param text The text to display in this text area.
* @param rows The number of rows in this text area.
* @param columns The number of columns in this text area.
* @param scrollbarVisibility Which scrollbars to display.
*/
public
TextArea(String text, int rows, int columns, int scrollbarVisibility)
{
super(text);
if ((rows < 1) || (columns < 0))
throw new IllegalArgumentException("Bad row or column value");
if ((scrollbarVisibility != SCROLLBARS_BOTH) &&
(scrollbarVisibility != SCROLLBARS_VERTICAL_ONLY) &&
(scrollbarVisibility != SCROLLBARS_HORIZONTAL_ONLY) &&
(scrollbarVisibility != SCROLLBARS_NONE))
throw new IllegalArgumentException("Bad scrollbar visibility value");
this.rows = rows;
this.columns = columns;
this.scrollbarVisibility = scrollbarVisibility;
}
/*************************************************************************/
/*
* Instance Variables
*/
/**
* Returns the number of columns in the field.
*
* @return The number of columns in the field.
*/
public int
getColumns()
{
return(columns);
}
/*************************************************************************/
/**
* Sets the number of columns in this field to the specified value.
*
* @param columns The new number of columns in the field.
*
* @exception IllegalArgumentException If columns is less than zero.
*/
public synchronized void
setColumns(int columns)
{
if (columns < 0)
throw new IllegalArgumentException("Value is less than zero: " +
columns);
this.columns = columns;
// FIXME: How to we communicate this to our peer?
}
/*************************************************************************/
/**
* Returns the number of rows in the field.
*
* @return The number of rows in the field.
*/
public int
getRows()
{
return(rows);
}
/*************************************************************************/
/**
* Sets the number of rows in this field to the specified value.
*
* @param rows The new number of rows in the field.
*
* @exception IllegalArgumentException If rows is less than zero.
*/
public synchronized void
setRows(int rows)
{
if (rows < 1)
throw new IllegalArgumentException("Value is less than one: " +
rows);
this.rows = rows;
// FIXME: How to we communicate this to our peer?
}
/*************************************************************************/
/**
* Returns the minimum size for this text field.
*
* @return The minimum size for this text field.
*/
public Dimension
getMinimumSize()
{
return(getMinimumSize(getRows(), getColumns()));
}
/*************************************************************************/
/**
* Returns the minimum size of a text field with the specified number
* of rows and columns.
*
* @param rows The number of rows to get the minimum size for.
* @param columns The number of columns to get the minimum size for.
*/
public Dimension
getMinimumSize(int rows, int columns)
{
TextAreaPeer tap = (TextAreaPeer)getPeer();
if (tap == null)
return(null); // FIXME: What do we do if there is no peer?
return(tap.getMinimumSize(rows, columns));
}
/*************************************************************************/
/**
* Returns the minimum size for this text field.
*
* @return The minimum size for this text field.
*
* @deprecated This method is depcreated in favor of
* <code>getMinimumSize()</code>.
*/
public Dimension
minimumSize()
{
return(getMinimumSize(getRows(), getColumns()));
}
/*************************************************************************/
/**
* Returns the minimum size of a text field with the specified number
* of rows and columns.
*
* @param rows The number of rows to get the minimum size for.
* @param columns The number of columns to get the minimum size for.
*
* @deprecated This method is deprecated in favor of
* <code>getMinimumSize(int)</code>.
*/
public Dimension
minimumSize(int rows, int columns)
{
return(getMinimumSize(rows, columns));
}
/*************************************************************************/
/**
* Returns the preferred size for this text field.
*
* @return The preferred size for this text field.
*/
public Dimension
getPreferredSize()
{
return(getPreferredSize(getRows(), getColumns()));
}
/*************************************************************************/
/**
* Returns the preferred size of a text field with the specified number
* of rows and columns.
*
* @param rows The number of rows to get the preferred size for.
* @param columns The number of columns to get the preferred size for.
*/
public Dimension
getPreferredSize(int rows, int columns)
{
TextAreaPeer tap = (TextAreaPeer)getPeer();
if (tap == null)
return(null); // FIXME: What do we do if there is no peer?
return(tap.getPreferredSize(rows, columns));
}
/*************************************************************************/
/**
* Returns the preferred size for this text field.
*
* @return The preferred size for this text field.
*
* @deprecated This method is deprecated in favor of
* <code>getPreferredSize()</code>.
*/
public Dimension
preferredSize()
{
return(getPreferredSize(getRows(), getColumns()));
}
/*************************************************************************/
/**
* Returns the preferred size of a text field with the specified number
* of rows and columns.
*
* @param rows The number of rows to get the preferred size for.
* @param columns The number of columns to get the preferred size for.
*
* @deprecated This method is deprecated in favor of
* <code>getPreferredSize(int)</code>.
*/
public Dimension
preferredSize(int columns)
{
return(getPreferredSize(rows, columns));
}
/*************************************************************************/
/**
* Returns one of the constants from this class indicating which
* types of scrollbars this object uses, if any.
*
* @return The scrollbar type constant for this object.
*/
public int
getScrollbarVisibility()
{
return(scrollbarVisibility);
}
/*************************************************************************/
/**
* Notify this object that it should create its native peer.
*/
public void
addNotify()
{
if (getPeer() != null)
return;
setPeer((ComponentPeer)getToolkit().createTextArea(this));
}
/*************************************************************************/
/**
* Appends the specified text to the end of the current text.
*
* @param text The text to append.
*/
public void
append(String str)
{
TextAreaPeer tap = (TextAreaPeer)getPeer();
if (tap == null)
return;
tap.insert(str, tap.getText().length());
}
/*************************************************************************/
/**
* Appends the specified text to the end of the current text.
*
* @param text The text to append.
*
* @deprecated This method is deprecated in favor of
* <code>append()</code>.
*/
public void
appendText(String text)
{
append(text);
}
/*************************************************************************/
/**
* Inserts the specified text at the specified location.
*
* @param text The text to insert.
* @param pos The insert position.
*/
public void
insert(String text, int pos)
{
TextAreaPeer tap = (TextAreaPeer)getPeer();
if (tap == null)
return;
tap.insert(text, pos);
}
/*************************************************************************/
/**
* Inserts the specified text at the specified location.
*
* @param text The text to insert.
* @param pos The insert position.
*
* @deprecated This method is depcreated in favor of <code>insert()</code>.
*/
public void
insertText(String text, int pos)
{
insert(text, pos);
}
/*************************************************************************/
/**
* Replaces the text bounded by the specified start and end positions
* with the specified text.
*
* @param text The new text for the range.
* @param start The start position of the replacement range.
* @param end The end position of the replacement range.
*/
public void
replaceRange(String text, int start, int end)
{
TextAreaPeer tap = (TextAreaPeer)getPeer();
if (tap == null)
return;
tap.replaceRange(text, start, end);
}
/*************************************************************************/
/**
* Replaces the text bounded by the specified start and end positions
* with the specified text.
*
* @param text The new text for the range.
* @param start The start position of the replacement range.
* @param end The end position of the replacement range.
*
* @deprecated This method is deprecated in favor of
* <code>replaceRange()</code>.
*/
public void
replaceText(String text, int start, int end)
{
replaceRange(text, start, end);
}
/*************************************************************************/
/**
* Returns a debugging string for this text area.
*
* @return A debugging string for this text area.
*/
protected String
paramString()
{
return(getClass().getName() + "(rows=" + getRows() + ",columns=" +
getColumns() + ",scrollbars=" + getScrollbarVisibility() +
")");
}
} // class TextArea

446
libjava/java/awt/TextComponent.java
View file

@ -1,51 +1,425 @@
/* Copyright (C) 1999, 2001 Free Software Foundation /* TextComponent.java -- Widgets for entering text
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of libjava. 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. */
This software is copyrighted work licensed under the terms of the
Libjava License. Please consult the file "LIBJAVA_LICENSE" for
details. */
package java.awt; package java.awt;
import java.awt.event.*; import java.awt.event.TextEvent;
import java.awt.event.TextListener;
import java.awt.peer.TextComponentPeer; import java.awt.peer.TextComponentPeer;
import java.awt.peer.ComponentPeer;
/* A very incomplete placeholder. */ /**
* This class provides common functionality for widgets than
public class TextComponent extends Component * contain text.
*
* @author Aaron M. Renn (arenn@urbanophile.com)
*/
public class TextComponent extends Component implements java.io.Serializable
{ {
protected TextListener textListener;
char[] buffer; /*
int length; * Static Variables
int caretPosition; */
public synchronized void addTextListener (TextListener listener) // Constant for serialization
{ private static final long serialVersionUID = -2214773872412987419L;
textListener = AWTEventMulticaster.add (textListener, listener);
}
public synchronized String getText () /*
{ return new String(buffer, 0, length); } * Instance Variables
*/
public synchronized void setText (String text) /**
{ * @serial Indicates whether or not this component is editable.
length = text.length(); */
if (buffer == null || buffer.length < length) private boolean editable;
buffer = new char[length];
text.getChars(0, length, buffer, 0);
}
public int getCaretPosition () { return caretPosition; } /**
* @serial The starting position of the selected text region.
*/
private int selectionStart;
public void setCaretPosition (int pos) /**
{ * @serial The ending position of the selected text region.
caretPosition = pos; */
if (peer != null) private int selectionEnd;
{
TextComponentPeer t = (TextComponentPeer) peer; /**
t.setCaretPosition (pos); * @serial The text in the component
} */
} private String text;
/**
* A list of listeners that will receive events from this object.
*/
protected transient TextListener textListener;
/*************************************************************************/
/*
* Constructors
*/
TextComponent(String text)
{
this.text = text;
} }
/*************************************************************************/
/*
* Instance Methods
*/
/**
* Returns the text in this component
*
* @return The text in this component.
*/
public synchronized String
getText()
{
TextComponentPeer tcp = (TextComponentPeer)getPeer();
if (tcp != null)
text = tcp.getText();
return(text);
}
/*************************************************************************/
/**
* Sets the text in this component to the specified string.
*
* @param text The new text for this component.
*/
public synchronized void
setText(String text)
{
if (text == null)
text = "";
this.text = text;
TextComponentPeer tcp = (TextComponentPeer)getPeer();
if (tcp != null)
tcp.setText(text);
}
/*************************************************************************/
/**
* Returns a string that contains the text that is currently selected.
*
* @return The currently selected text region.
*/
public synchronized String
getSelectedText()
{
String alltext = getText();
int start = getSelectionStart();
int end = getSelectionEnd();
return(alltext.substring(start, end));
}
/*************************************************************************/
/**
* Returns the starting position of the selected text region.
* // FIXME: What is returned if there is no selected text?
*
* @return The starting position of the selected text region.
*/
public synchronized int
getSelectionStart()
{
TextComponentPeer tcp = (TextComponentPeer)getPeer();
if (tcp != null)
selectionStart = tcp.getSelectionStart();
return(selectionStart);
}
/*************************************************************************/
/**
* Sets the starting position of the selected region to the
* specified value. If the specified value is out of range, then it
* will be silently changed to the nearest legal value.
*
* @param selectionStart The new start position for selected text.
*/
public synchronized void
setSelectionStart(int selectionStart)
{
select(selectionStart, getSelectionEnd());
}
/*************************************************************************/
/**
* Returns the ending position of the selected text region.
* // FIXME: What is returned if there is no selected text.
*
* @return The ending position of the selected text region.
*/
public synchronized int
getSelectionEnd()
{
TextComponentPeer tcp = (TextComponentPeer)getPeer();
if (tcp != null)
selectionEnd = tcp.getSelectionEnd();
return(selectionEnd);
}
/*************************************************************************/
/**
* Sets the ending position of the selected region to the
* specified value. If the specified value is out of range, then it
* will be silently changed to the nearest legal value.
*
* @param selectionEnd The new start position for selected text.
*/
public synchronized void
setSelectionEnd(int selectionEnd)
{
select(getSelectionStart(), selectionEnd);
}
/*************************************************************************/
/**
* This method sets the selected text range to the text between the
* specified start and end positions. Illegal values for these
* positions are silently fixed.
*
* @param startSelection The new start position for the selected text.
* @param endSelection The new end position for the selected text.
*/
public synchronized void
select(int selectionStart, int endSelection)
{
if (selectionStart < 0)
selectionStart = 0;
if (selectionStart > getText().length())
selectionStart = text.length();
if (selectionEnd > text.length())
selectionEnd = text.length();
if (selectionStart > getSelectionEnd())
selectionStart = selectionEnd;
this.selectionStart = selectionStart;
this.selectionEnd = selectionEnd;
TextComponentPeer tcp = (TextComponentPeer)getPeer();
if (tcp != null)
tcp.select(selectionStart, selectionEnd);
}
/*************************************************************************/
/**
* Selects all of the text in the component.
*/
public synchronized void
selectAll()
{
select(0, getText().length());
}
/*************************************************************************/
/**
* Returns the current caret position in the text.
*
* @return The caret position in the text.
*/
public synchronized int
getCaretPosition()
{
TextComponentPeer tcp = (TextComponentPeer)getPeer();
if (tcp != null)
return(tcp.getCaretPosition());
else
return(0);
}
/*************************************************************************/
/**
* Sets the caret position to the specified value.
*
* @param caretPosition The new caret position.
*/
public synchronized void
setCaretPosition(int caretPosition)
{
TextComponentPeer tcp = (TextComponentPeer)getPeer();
if (tcp != null)
tcp.setCaretPosition(caretPosition);
}
/*************************************************************************/
/**
* Tests whether or not this component's text can be edited.
*
* @return <code>true</code> if the text can be edited, <code>false</code>
* otherwise.
*/
public boolean
isEditable()
{
return(editable);
}
/*************************************************************************/
/**
* Sets whether or not this component's text can be edited.
*
* @param editable <code>true</code> to enable editing of the text,
* <code>false</code> to disable it.
*/
public synchronized void
setEditable(boolean editable)
{
this.editable = editable;
TextComponentPeer tcp = (TextComponentPeer)getPeer();
if (tcp != null)
tcp.setEditable(editable);
}
/*************************************************************************/
/**
* Notifies the component that it should destroy its native peer.
*/
public void
removeNotify()
{
super.removeNotify();
}
/*************************************************************************/
/**
* Adds a new listener to the list of text listeners for this
* component.
*
* @param listener The listener to be added.
*/
public synchronized void
addTextListener(TextListener listener)
{
textListener = AWTEventMulticaster.add(textListener, listener);
enableEvents(AWTEvent.TEXT_EVENT_MASK);
}
/*************************************************************************/
/**
* Removes the specified listener from the list of listeners
* for this component.
*
* @param listener The listener to remove.
*/
public synchronized void
removeTextListener(TextListener listener)
{
textListener = AWTEventMulticaster.remove(textListener, listener);
}
/*************************************************************************/
/**
* Processes the specified event for this component. Text events are
* processed by calling the <code>processTextEvent()</code> method.
* All other events are passed to the superclass method.
*
* @param event The event to process.
*/
protected void
processEvent(AWTEvent event)
{
if (event instanceof TextEvent)
processTextEvent((TextEvent)event);
else
super.processEvent(event);
}
/*************************************************************************/
/**
* Processes the specified text event by dispatching it to any listeners
* that are registered. Note that this method will only be called
* if text event's are enabled. This will be true if there are any
* registered listeners, or if the event has been specifically
* enabled using <code>enableEvents()</code>.
*
* @param event The text event to process.
*/
protected void
processTextEvent(TextEvent event)
{
if (textListener != null)
textListener.textValueChanged(event);
}
/*************************************************************************/
/**
* Returns a debugging string.
*
* @return A debugging string.
*/
protected String
paramString()
{
return(getClass().getName() + "(text=" + getText() + ")");
}
} // class TextComponent

469
libjava/java/awt/TextField.java
View file

@ -1,16 +1,469 @@
/* Copyright (C) 2000 Free Software Foundation /* TextField.java -- A one line text entry field
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of libgcj. 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. */
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.awt; package java.awt;
import java.awt.event.*;
/* A very incomplete placeholder. */ import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.peer.TextFieldPeer;
import java.awt.peer.TextComponentPeer;
import java.awt.peer.ComponentPeer;
public class TextField extends TextComponent /**
* This class implements a single line text entry field widget
*
* @author Aaron M. Renn (arenn@urbanophile.com)
*/
public class TextField extends TextComponent implements java.io.Serializable
{ {
/*
* Static Variables
*/
// Serialization constant
private static final long serialVersionUID = -2966288784432217853L;
/*************************************************************************/
/*
* Instance Variables
*/
/**
* @serial The number of columns in the text entry field.
*/
private int columns;
/**
* @serial The character that is echoed when doing protected input
*/
private char echoChar;
// List of registered ActionListener's for this object.
private ActionListener action_listeners;
/*************************************************************************/
/*
* Constructors
*/
/*
* Initializes a new instance of <code>TextField</code> that is empty
* and has one column.
*/
public
TextField()
{
this("", 1);
} }
/*************************************************************************/
/**
* Initializes a new instance of <code>TextField</code> containing
* the specified text. The number of columns will be equal to the
* length of the text string.
*
* @param text The text to display in the field.
*/
public
TextField(String text)
{
this(text, text.length());
}
/*************************************************************************/
/**
* Initializes a new instance of <code>TextField</code> that is empty
* and has the specified number of columns.
*
* @param columns The number of columns in the text field.
*/
public
TextField(int columns)
{
this("", columns);
}
/*************************************************************************/
/**
* Initializes a new instance of <code>TextField</code> with the
* specified text and number of columns.
*
* @param text The text to display in the field.
* @param columns The number of columns in the field.
*/
public
TextField(String text, int columns)
{
super(text);
this.columns = columns;
}
/*************************************************************************/
/*
* Instance Methods
*/
/**
* Returns the number of columns in the field.
*
* @return The number of columns in the field.
*/
public int
getColumns()
{
return(columns);
}
/*************************************************************************/
/**
* Sets the number of columns in this field to the specified value.
*
* @param columns The new number of columns in the field.
*
* @exception IllegalArgumentException If columns is less than zero.
*/
public synchronized void
setColumns(int columns)
{
if (columns < 0)
throw new IllegalArgumentException("Value is less than zero: " +
columns);
this.columns = columns;
// FIXME: How to we communicate this to our peer?
}
/*************************************************************************/
/**
* Returns the character that is echoed to the screen when a text
* field is protected (such as when a password is being entered).
*
* @return The echo character for this text field.
*/
public char
getEchoChar()
{
return(echoChar);
}
/*************************************************************************/
/**
* Sets the character that is echoed when protected input such as
* a password is displayed.
*
* @param echoChar The new echo character.
*/
public void
setEchoChar(char echoChar)
{
this.echoChar = echoChar;
TextFieldPeer tfp = (TextFieldPeer)getPeer();
if (tfp != null)
tfp.setEchoChar(echoChar);
}
/*************************************************************************/
/**
* Sets the character that is echoed when protected input such as
* a password is displayed.
*
* @param echoChar The new echo character.
*
* @deprecated This method is deprecated in favor of
* <code>setEchoChar()</code>
*/
public void
setEchoCharacter(char echoChar)
{
setEchoChar(echoChar);
}
/*************************************************************************/
/**
* Tests whether or not this text field has an echo character set
* so that characters the user type are not echoed to the screen.
*
* @return <code>true</code> if an echo character is set,
* <code>false</code> otherwise.
*/
public boolean
echoCharIsSet()
{
if (echoChar == '\u0000')
return(false);
else
return(true);
}
/*************************************************************************/
/**
* Returns the minimum size for this text field.
*
* @return The minimum size for this text field.
*/
public Dimension
getMinimumSize()
{
return(getMinimumSize(getColumns()));
}
/*************************************************************************/
/**
* Returns the minimum size of a text field with the specified number
* of columns.
*
* @param columns The number of columns to get the minimum size for.
*/
public Dimension
getMinimumSize(int columns)
{
TextFieldPeer tfp = (TextFieldPeer)getPeer();
if (tfp == null)
return(null); // FIXME: What do we do if there is no peer?
return(tfp.getMinimumSize(columns));
}
/*************************************************************************/
/**
* Returns the minimum size for this text field.
*
* @return The minimum size for this text field.
*
* @deprecated This method is depcreated in favor of
* <code>getMinimumSize()</code>.
*/
public Dimension
minimumSize()
{
return(getMinimumSize(getColumns()));
}
/*************************************************************************/
/**
* Returns the minimum size of a text field with the specified number
* of columns.
*
* @param columns The number of columns to get the minimum size for.
*
* @deprecated This method is deprecated in favor of
* <code>getMinimumSize(int)</code>.
*/
public Dimension
minimumSize(int columns)
{
return(getMinimumSize(columns));
}
/*************************************************************************/
/**
* Returns the preferred size for this text field.
*
* @return The preferred size for this text field.
*/
public Dimension
getPreferredSize()
{
return(getPreferredSize(getColumns()));
}
/*************************************************************************/
/**
* Returns the preferred size of a text field with the specified number
* of columns.
*
* @param columns The number of columns to get the preferred size for.
*/
public Dimension
getPreferredSize(int columns)
{
TextFieldPeer tfp = (TextFieldPeer)getPeer();
if (tfp == null)
return(null); // FIXME: What do we do if there is no peer?
return(tfp.getPreferredSize(columns));
}
/*************************************************************************/
/**
* Returns the preferred size for this text field.
*
* @return The preferred size for this text field.
*
* @deprecated This method is deprecated in favor of
* <code>getPreferredSize()</code>.
*/
public Dimension
preferredSize()
{
return(getPreferredSize(getColumns()));
}
/*************************************************************************/
/**
* Returns the preferred size of a text field with the specified number
* of columns.
*
* @param columns The number of columns to get the preferred size for.
*
* @deprecated This method is deprecated in favor of
* <code>getPreferredSize(int)</code>.
*/
public Dimension
preferredSize(int columns)
{
return(getPreferredSize(columns));
}
/*************************************************************************/
/**
* Notifies this object that it should create its native peer.
*/
public void
addNotify()
{
if (getPeer() != null)
return;
setPeer((ComponentPeer)getToolkit().createTextField(this));
}
/*************************************************************************/
/**
* Addes a new listener to the list of action listeners for this
* object.
*
* @param listener The listener to add to the list.
*/
public synchronized void
addActionListener(ActionListener listener)
{
action_listeners = AWTEventMulticaster.add(action_listeners, listener);
enableEvents(AWTEvent.ACTION_EVENT_MASK);
}
/*************************************************************************/
/**
* Removes the specified listener from the list of action listeners
* for this object.
*
* @param listener The listener to remove from the list.
*/
public synchronized void
removeActionListener(ActionListener listener)
{
action_listeners = AWTEventMulticaster.remove(action_listeners, listener);
}
/*************************************************************************/
/**
* Processes the specified event. If the event is an instance of
* <code>ActionEvent</code> then <code>processActionEvent()</code> is
* called to process it, otherwise the event is sent to the
* superclass.
*
* @param event The event to process.
*/
protected void
processEvent(AWTEvent event)
{
if (event instanceof ActionEvent)
processActionEvent((ActionEvent)event);
else
super.processEvent(event);
}
/*************************************************************************/
/**
* Processes an action event by calling any registered listeners.
* Note to subclasses: This method is not called unless action events
* are enabled on this object. This will be true if any listeners
* are registered, or if action events were specifically enabled
* using <code>enableEvents()</code>.
*
* @param event The event to process.
*/
protected void
processActionEvent(ActionEvent event)
{
if (action_listeners != null)
action_listeners.actionPerformed(event);
}
/*************************************************************************/
/**
* Returns a debug string for this object.
*
* @return A debug string for this object.
*/
protected String
paramString()
{
return(getClass().getName() + "(columns=" + getColumns() + ",echoChar=" +
getEchoChar());
}
} // class TextField