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WindowsTextFieldUI.java
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1998-06-30
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/*
* @(#)WindowsTextFieldUI.java 1.7 98/03/05
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
package com.sun.java.swing.plaf.windows;
import java.awt.*;
import java.awt.event.*;
import com.sun.java.swing.plaf.*;
import com.sun.java.swing.plaf.basic.BasicTextFieldUI;
import com.sun.java.swing.text.*;
import com.sun.java.swing.*;
import com.sun.java.swing.plaf.UIResource;
/**
* Provides the Windows look and feel for a text field. This
* is basically the following customizations to the default
* look-and-feel.
* <ul>
* <li>The border is beveled (using the standard control color).
* <li>The background is white by default.
* <li>The highlight color is a dark color, blue by default.
* <li>The foreground color is high contrast in the selected
* area, white by default. The unselected foreground is black.
* <li>The cursor blinks at about 1/2 second intervals.
* <li>The entire value is selected when focus is gained.
* <li>Shift-left-arrow and shift-right-arrow extend selection
* <li>Cntrl-left-arrow and cntrl-right-arrow act like home and
* end respectively.
* </ul>
* <p>
* Warning: serialized objects of this class will not be compatible with
* future swing releases. The current serialization support is appropriate
* for short term storage or RMI between Swing1.0 applications. It will
* not be possible to load serialized Swing1.0 objects with future releases
* of Swing. The JDK1.2 release of Swing will be the compatibility
* baseline for the serialized form of Swing objects.
*
* @author Timothy Prinzing
* @version 1.7 03/05/98
*/
public class WindowsTextFieldUI extends BasicTextFieldUI
{
/**
* Creates a UI for a JTextField.
*
* @param c the text field
* @return the UI
*/
public static ComponentUI createUI(JComponent c) {
return new WindowsTextFieldUI();
}
/**
* Creates the caret for a field.
*
* @return the caret
*/
protected Caret createCaret() {
return new WindowsFieldCaret();
}
/**
* WindowsFieldCaret has different scrolling behavior than
* DefaultCaret, selects the field when focus enters it, and
* deselects the field when focus leaves.
*/
class WindowsFieldCaret extends DefaultCaret implements UIResource {
public WindowsFieldCaret() {
super();
}
/**
* Called when the component containing the caret gains
* focus. This is implemented to set the caret to visible
* if the component is editable, and sets the selection
* to visible.
*
* @param e the focus event
* @see FocusListener#focusGained
*/
public void focusGained(FocusEvent e) {
super.focusGained(e);
JTextComponent c = getComponent();
Document doc = c.getDocument();
setDot(0);
moveDot(doc.getLength());
}
/**
* Called when the component containing the caret loses
* focus. This is implemented to set the caret to visibility
* to false, and to set the selection visibility to false.
*
* @param e the focus event
* @see FocusListener#focusLost
*/
public void focusLost(FocusEvent e) {
setDot(getDot());
setVisible(false);
}
/**
* Adjusts the visibility of the caret according to
* the windows feel which seems to be to move the
* caret out into the field by about a quarter of
* a field length if not visible.
*/
protected void adjustVisibility(Rectangle r) {
JTextField field = (JTextField) getComponent();
BoundedRangeModel vis = field.getHorizontalVisibility();
int x = r.x + vis.getValue();
int quarterSpan = vis.getExtent() / 4;
if (x < vis.getValue()) {
vis.setValue(x - quarterSpan);
} else if (x > vis.getValue() + vis.getExtent()) {
vis.setValue(x - (3 * quarterSpan));
}
}
}
}