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MetalTreeUI.java
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1998-02-26
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/*
* @(#)MetalTreeUI.java 1.7 98/02/06
*
* 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.metal;
import com.sun.java.swing.*;
import com.sun.java.swing.event.*;
import com.sun.java.swing.text.DefaultTextUI;
import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.io.*;
import java.util.*;
import com.sun.java.swing.plaf.*;
import com.sun.java.swing.tree.*;
import com.sun.java.swing.plaf.basic.*;
/**
* MetalTreeUI supports the client property "value-add" system of customization
* It uses it to determine what style of line to draw. There are three choices.
* The default choice is a set of horiontal lines next to each root node.
* Also available is a more variant with angled legs running from parent to child.
* Lastly you can choose no lines at all. Here is some code to turn on angled legs.
*
* tree.putClientProperty("JTree.lineStyle", "Angled");
*
* Here is some code to turn off lines all together.
*
* tree.putClientProperty("JTree.lineStyle", "None");
*
* Also if you've used one of these options, and want to return to the default
* horizontal line style you can use the following.
*
* tree.putClientProperty("JTree.lineStyle", "Horizontal");
*
* <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.
*
* @version 1.7 02/06/98
* @author Tom Santos
* @author Steve Wilson (value add stuff)
*/
public class MetalTreeUI extends BasicTreeUI {
private static Color lineColor;
private static final String LINE_STYLE = "JTree.lineStyle";
private static final String LEG_LINE_STYLE_STRING = "Angled";
private static final String HORIZ_STYLE_STRING = "Horizontal";
private static final String NO_STYLE_STRING = "None";
private static final int LEG_LINE_STYLE = 2;
private static final int HORIZ_LINE_STYLE = 1;
private static final int NO_LINE_STYLE = 0;
private int lineStyle = HORIZ_LINE_STYLE;
private PropertyChangeListener lineStyleListener = new LineListener();
// Boilerplate
public static ComponentUI createUI(JComponent x) {
return new MetalTreeUI();
}
public MetalTreeUI()
{
super();
}
protected int getHorizontalLegBuffer()
{
return 4;
}
public void installUI( JComponent c ) {
super.installUI( c );
if ( !tree.isLargeModel() ) {
setRowHeight( 0 );
}
lineColor = UIManager.getColor( "Tree.line" );
Object lineStyleFlag = c.getClientProperty( LINE_STYLE );
decodeLineStyle(lineStyleFlag);
c.addPropertyChangeListener(lineStyleListener);
}
public void uninstallUI( JComponent c) {
c.removePropertyChangeListener(lineStyleListener);
super.uninstallUI(c);
}
/** this function converts between the string passed into the client property
* and the internal representation (currently and int)
*
*/
protected void decodeLineStyle(Object lineStyleFlag) {
if ( lineStyleFlag == null || lineStyleFlag.equals(HORIZ_STYLE_STRING) ){
lineStyle = HORIZ_LINE_STYLE; // default case
} else {
if ( lineStyleFlag.equals(LEG_LINE_STYLE_STRING) ) {
lineStyle = LEG_LINE_STYLE;
} else if ( lineStyleFlag.equals(NO_STYLE_STRING) ) {
lineStyle = NO_LINE_STYLE;
}
}
}
protected boolean clickedInExpandControl( VisibleTreeNode node, LargeTreeModelNode eNode,
int row, int rowLevel, int mouseX, int mouseY )
{
if ( node != null && node.isLeaf() )
{
return false;
}
int boxWidth;
if(getExpandedIcon() != null)
boxWidth = getExpandedIcon().getIconWidth() + 6;
else
boxWidth = 8;
int boxLeftX;
if(this.getShowsRootHandles())
boxLeftX = ((rowLevel * totalChildIndent) +
getLeftChildIndent()) - boxWidth/2;
else
boxLeftX = (((rowLevel - 1) * totalChildIndent) +
getLeftChildIndent()) - boxWidth/2;
int boxRightX = boxLeftX + boxWidth;
return mouseX >= boxLeftX && mouseX <= boxRightX;
}
public void paint(Graphics g, JComponent c) {
super.paint( g, c );
// Paint the lines
if (lineStyle == HORIZ_LINE_STYLE) {
paintHorizontalSeparators(g,c);
}
}
protected void paintHorizontalSeparators(Graphics g, JComponent c) {
g.setColor( lineColor );
Rectangle clipBounds = g.getClipBounds();
int beginRow = getRowContainingYLocation( clipBounds.y );
int endRow = getRowContainingYLocation( clipBounds.y + (clipBounds.height - 1) );
if ( beginRow <= -1 || endRow <= -1 ) {
return;
}
for ( int i = beginRow; i <= endRow; ++i ) {
VisibleTreeNode node = getNode( i );
if ( node.getParent() == node.getRoot() ) {
// Draw a line at the top
g.drawLine( clipBounds.x, getNodeY( node ),
clipBounds.x + clipBounds.width, getNodeY( node ) );
}
}
}
public void drawVerticalPartOfLeg( Graphics g, JComponent c, int depth, int parentY, int childY,
int parentRowHeight, int childRowHeight ) {
if (lineStyle == LEG_LINE_STYLE) {
super.drawVerticalPartOfLeg( g, c, depth, parentY, childY, parentRowHeight, childRowHeight);
}
}
public void drawHorizontalPartOfLeg( Graphics g, JComponent c, int lineY, int leftX, int rightX ) {
if (lineStyle == LEG_LINE_STYLE) {
super.drawHorizontalPartOfLeg( g, c, lineY, leftX, rightX);
}
}
/** This class listens for changes in line style */
class LineListener implements PropertyChangeListener, java.io.Serializable {
public void propertyChange(PropertyChangeEvent e) {
String name = e.getPropertyName();
if ( name.equals( LINE_STYLE ) ) {
decodeLineStyle(e.getNewValue());
}
}
} // end class PaletteListener
}