statusbar.java

具有不同语法高亮的编辑器实例

/*
 * 07/26/2004
 *
 * StatusBar.java - A generic status bar containing a status message and an
 *                  optional size grip, similar to those found in Microsoft
 *                  Windows applications.
 * Copyright (C) 2004 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;

import java.awt.AWTEvent;
import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.AbstractButton;
import javax.swing.Action;
import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.BevelBorder;


/**
 * A generic status bar containing a status message and a size grip,
 * similar to those found in Microsoft Windows applications.<p>
 * This component can be used as-is, or can be subclassed and have additional
 * components added to it.  If the latter, the user MUST add instances of
 * {@link StatusBarPanel} and they MUST be added via the
 * <code>addStatusBarComponent</code> methods; if you instead use one of
 * <code>Container</code>'s <code>add</code> methods, there is no guarantee as
 * to the flow/layout of the status bar.
 *
 * @author Robert Futrell
 * @version 0.7
 */
public class StatusBar extends StatusBarPanel implements MouseListener {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1410068134864915906L;

	public static final String STYLE_PROPERTY		= "StatusBar.style";

	public static final int WINDOWS_98_STYLE		= 0;
	public static final int WINDOWS_XP_STYLE		= 1;
	//public static final int OFFICE_2003_STYLE		= 2;
	private static final int MIN_STYLE_CONSTANT		= 0;
	private static final int MAX_STYLE_CONSTANT		= 1;//2;

	public static final String DEFAULT_STATUS_MESSAGE = "Ready";

	private JLabel statusMessage;
	private String defaultMessage;
	private GridBagLayout gridBag;
	private SizeGrip sizeGrip;
	private int style = -1;

	private static Robot robot;
	// Workaround for if X-Server doesn't support XTEST 2.2 -
	// see Sun Bug ID 6329226.
	private static boolean robotCreationAttempted;


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


	/**
	 * Creates the status bar with a default status message and a size grip.
	 */
	public StatusBar() {
		this(DEFAULT_STATUS_MESSAGE);
	}


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


	/**
	 * Creates the status bar with the specified default message and a size
	 * grip.
	 *
	 * @param defaultStatusMessage The default message to display.
	 */
	public StatusBar(String defaultStatusMessage) {
		this(defaultStatusMessage, WINDOWS_XP_STYLE);
	}


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


	/**
	 * Creates the status bar.
	 *
	 * @param defaultStatusMessage The default message to display.
	 * @param style The style with which to paint the status bar.
	 */
	public StatusBar(String defaultStatusMessage, int style) {

		// Call JPanel's constructor.
		super();

		// Initialize private variables.
		defaultMessage = defaultStatusMessage;
		statusMessage = new JLabel(defaultStatusMessage);

		// Try to create a Robot, if necessary.
		try {
			if (!robotCreationAttempted) { // Sun Bug ID 6329226
				robotCreationAttempted = true;
				robot = new Robot();
			}
		// Could be an AWTException or a SecurityException...
		// either way, this system does not support Robot.
		} catch(Exception e) {
			e.printStackTrace();
		}

		// Make the layout such that different items can be different sizes.
		gridBag = new GridBagLayout();
		GridBagConstraints c = new GridBagConstraints();
		setLayout(gridBag);
		c.fill = GridBagConstraints.BOTH;

		// Create and add a panel containing the "status message."
		// The message panel uses GridLayout to keep the message left-aligned.
		c.weightx = 1.0;
		JPanel status = new StatusBarPanel(new GridLayout(1,1,8,8),
									statusMessage);
		gridBag.setConstraints(status, c);
		add(status);

		// Add the size grip.
		this.sizeGrip = new SizeGrip();
		c.weightx = 0.0;
		gridBag.setConstraints(this.sizeGrip, c);
		add(this.sizeGrip);

		setStyle(style);
		setBorder(getStatusBarBorder());

	}


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


	/**
	 * Adds a component to this status bar.
	 *
	 * @param panel The panel to add.
	 * @param index The index at which to place this component.  A value of
	 *        <code>0</code> means "right after the status message."
	 * @param constraints The constraints with which to add the panel.
	 */
	public void addStatusBarComponent(StatusBarPanel panel,
								int index,
								GridBagConstraints constraints) {
		gridBag.setConstraints(panel, constraints);
		panel.setBorder(getStatusBarComponentBorder());
		index++; // As we're 0-based, but 0==status message panel.
		if (index<1)
			index = 1;
		else if (index>getComponentCount()-fromRight())
			index = getComponentCount() - fromRight();
		add(panel, index);
	}


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


	/**
	 * Adds a component to the end of this status bar (but before the size
	 * grip).  This is the preferred method of adding components.
	 *
	 * @param panel The panel to add.
	 * @param constraints The constraints with which to add the panel.
	 */
	public void addStatusBarComponent(StatusBarPanel panel,
								GridBagConstraints constraints) {
		// Put in front of the size grip.
		int index = getComponentCount() - fromRight();
		addStatusBarComponent(panel, index, constraints);
	}


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


	/**
	 * Determines how many panels "over" from the right to add a new panel.
	 * This method is here because the XP-style uses a "spacer" filler panel
	 * to have space between the size grip and the line/column indicator, so
	 * for different styles, panels must be added/removed in different places.
	 *
	 * @return The number of panels on the right of the status bar that must
	 *         stay on the right.
	 */
	private final int fromRight() {
		if (getStyle()==WINDOWS_XP_STYLE)
			return 2;
		return 1;
	}


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


	/**
	 * Returns the <code>Robot</code> instance shared among all status
	 * bars.
	 *
	 * @return The <code>Robot</code>, or <code>null</code> if the OS does
	 *         not support it.
	 */
	private static Robot getRobot() {
		return robot;
	}

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


	/**
	 * Returns the border for the size grip, depending on the current style.
	 *
	 * @return The border.
	 */
	private Border getSizeGripBorder() {

		switch (style) {

			default:
				return null;

		}

	}


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


	/**
	 * Returns a border for the status bar.
	 *
	 * @return The border.
	 */
	private Border getStatusBarBorder() {
		switch (style) {

			case WINDOWS_98_STYLE:
				return BorderFactory.createEmptyBorder(0,5,0,0);

			case WINDOWS_XP_STYLE:
				return BorderFactory.createEmptyBorder(0,5,0,0);
				//return new StatusBarTopShadowBorder();

			default:
				return BorderFactory.createEmptyBorder(0,5,0,0);

		}
	}


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


	/**
	 * Returns a border suitable for most status bar components.
	 *
	 * @return The border.
	 */
	private Border getStatusBarComponentBorder() {

		switch (style) {

			case WINDOWS_98_STYLE:
				return BorderFactory.createCompoundBorder(
					BorderFactory.createBevelBorder(BevelBorder.LOWERED),
					BorderFactory.createEmptyBorder(0,3,0,3));

			case WINDOWS_XP_STYLE:
				return BorderFactory.createCompoundBorder(
					new BevelDividerBorder(BevelDividerBorder.LEFT, 2),
					BorderFactory.createEmptyBorder(0,3,0,3));

			default:
				return null;

		}

	}


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


	/**
	 * Returns the message in the status bar.
	 *
	 * @return The message in the status bar.
	 * @see #setStatusMessage
	 */
	public String getStatusMessage() {
		return statusMessage.getText();
	}


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


	/**
	 * Returns the "style" used to paint this status bar.
	 *
	 * @return The style of this status bar, such as
	 *         <code>WINDOWS_XP_STYLE</code>.
	 * @see #setStyle
	 */
	public int getStyle() {
		return style;
	}


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