categorynamecellrenderer.java

具有不同语法高亮的编辑器实例

/*
 * 08/10/2005
 *
 * CategoryNameCellRenderer.java - Renderer for a category name row.
 * Copyright (C) 2005 Robert Futrell
 * [e-mail]
 * www.website.com
 *
 * This program 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
 * of the License, or any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.fife.ui.propertysheet.renderers;

import java.awt.Component;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.geom.Rectangle2D;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.table.DefaultTableCellRenderer;

import org.fife.ui.propertysheet.PropertySheetUtilities;


/**
 * Renderer for category rows.
 *
 * @author Robert Futrell
 * @version 1.0
 */
public class CategoryNameCellRenderer extends DefaultTableCellRenderer {

	/**
	 * 
	 */
	private static final long serialVersionUID = 2185075561403410267L;

	private Font cachedTableFont;
	private Font cachedBoldFont;
	private boolean paintBottomLine;


/*****************************************************************************/

	/**
	 * Returns the component with which to renderer category rows.
	 */
	public Component getTableCellRendererComponent(JTable table, Object value,
				boolean isSelected, boolean hasFocus, int row, int column) {

		setBackground(PropertySheetUtilities.getBorderColor());
		setForeground(table.getForeground());

		// We must jump through hoops for the font as super's implementation
		// sets the font too.  We want to keep it bold, but try to prevent
		// from making the deriveFont() call unless we have to.
		Font tableFont = table.getFont();
		if (!tableFont.equals(cachedTableFont)) {
			cachedTableFont = tableFont;
			cachedBoldFont = cachedTableFont.deriveFont(Font.BOLD);
		}
		setFont(cachedBoldFont);

		// Don't set a value (text) for column 1 as it contains a Boolean
		// specifying our collapsed/expanded state.
		if (column==0) {
			setValue(value);
			setBorder(hasFocus ?
				UIManager.getBorder("Table.focusCellHighlightBorder") :
				noFocusBorder);
		}
		else { // column==1.
			setValue(null);
			setBorder(null);
		}
		setForeground(PropertySheetUtilities.getBorderColor().darker());
		Object bool = table.getValueAt(row,1);
		if (bool instanceof Boolean)
			paintBottomLine = ((Boolean)bool).booleanValue() &&
							row<table.getRowCount()-1;
		else
			paintBottomLine = false;

		return this;

	}


/*****************************************************************************/


	/**
	 * Paints the border for this renderer.  This method is overridden so that
	 * the border is painted to be only the width of the text of the cell,
	 * to mimic property sheets found in Visual Studio.
	 *
	 * @param g The graphics context.
	 */
	protected void paintBorder(Graphics g) {

		if (paintBottomLine) {
			java.awt.Rectangle bounds = getBounds();
			g.setColor(UIManager.getColor("Panel.background"));
			int y = bounds.height - 1;
			g.drawLine(0,y, bounds.width,y);
		}

		Border border = getBorder();
		if (border!=null) {
			String text = getText();
			Rectangle2D bounds = this.getFontMetrics(cachedBoldFont).
											getStringBounds(text, g);
			int width = (int)bounds.getWidth() + 2; // Fudge factor.
			border.paintBorder(this, g, 0,0, width,getHeight());
		}
	}


/*****************************************************************************/

}