topiceditor.java

用Swing实现的CHM制作工具

package g2w.app.gchm.gui;

import g2w.app.gchm.GChm;
import g2w.app.gchm.lib.GLightBox;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;

import javax.swing.AbstractAction;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JToggleButton;
import javax.swing.JToolBar;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.tree.TreePath;

/**
 * TopicEditor is a mini editor to edit the topic
 * with a simple html source editor embeded in.
 * <i>The html source editor not yet supports all general encodings, <br/>
 * but we will try to do more.</i> 
 * 
 * @author Yangle
 * @version 034 2009-3-22 8:47:52
 */
public class TopicEditor extends JPanel implements DocumentListener {
	/** The owner. */
	private ProjectEditor owner;
	
	/** A light box to show the page editor. */
	private GLightBox pageEditorView;
	
	/** The page editor. */
	private PageEditor pageEditor;
	
	/** The current treepath */
	private TreePath treePath;
	
	/** The current topic. */
	private ContentElement topic;
	
	/** Used to display the topic's name. */
	private JTextField topicName;
	
	/** Used to indicated whether to link a document to the topic or not. */
	private JToggleButton linkingMode; 
	
	/** A file chooser to chose the html document file. */
	private JFileChooser chooser;
	
	/** A button used to submit the changes. */
	private JButton submit;
	
	/** A flag to show if the content has changed. */
	private boolean contentChanged;
	
	public TopicEditor(ProjectEditor owner) {
		super();
		this.owner = owner;
		initComponents();
	}

	/**
	 * Initialize all compoments.
	 */
	private void initComponents() {
		setLayout(new BorderLayout());
		
		// Configure the file chooser.
		chooser = new JFileChooser();
		chooser.setDialogTitle("选择与标题关联的文档");
		chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
		chooser.setFileFilter(new FileNameExtensionFilter("HTML文档(*.htm, *.html)", "htm", "html"));
		chooser.setAcceptAllFileFilterUsed(false);
		chooser.setMultiSelectionEnabled(false);
		
		add(createTopicWrap(), "North");
		add(createPageWrap(), "Center");
		
		topicName.getDocument().addDocumentListener(this);
		pageEditor.addDocumentListener(this);
	}

	private Component createPageWrap() {
		pageEditorView = new GLightBox("编辑关联文档", false);
		pageEditor = new PageEditor();
		pageEditor.load(null);
		pageEditorView.setView(pageEditor);
		return pageEditorView;
	}

	private JToolBar createTopicWrap() {
		JToolBar topicWrap = new JToolBar();
		topicWrap.setFloatable(false);
		topicWrap.add(new JLabel("标题:"));
		topicWrap.add(Box.createHorizontalStrut(2));
		topicName = new JTextField(20);
		topicWrap.add(topicName);
		topicWrap.add(Box.createHorizontalStrut(2));
		linkingMode = new JToggleButton(new AbstractAction("关联文档") {
			@Override
			public void actionPerformed(ActionEvent evt) {
				toggleLinkedDocument();
			}
		});
		topicWrap.add(linkingMode);
		topicWrap.add(Box.createHorizontalGlue());
		submit = new JButton("确定");
		submit.setIcon(GChm.getImage("/resources/submit.png"));
		submit.setToolTipText("保存文档并更新标题");
		submit.setEnabled(false);
		topicWrap.add(submit);
		return topicWrap;
	}

	/**
	 * Toogle whether to link a document or not.
	 */
	private void toggleLinkedDocument() {
		if (linkingMode.isSelected()) {
			int state = chooser.showOpenDialog(this);
			File file = chooser.getSelectedFile();
			if (file != null && state == JFileChooser.APPROVE_OPTION) {
				if (owner.isFileInProject(file)) {
					pageEditor.load(file);
					contentChanged = true;
				} else {
					JOptionPane.showMessageDialog(this, "请先将文件添加到工程目录下!");
					linkingMode.setSelected(false);
				}
			} else {
				linkingMode.setSelected(false);
			}
		} else {
			System.out.println("Break linking.");
			if (JOptionPane.showConfirmDialog(this, "确定取消文档关联?") 
					== JOptionPane.OK_OPTION) {
				pageEditor.load(null);
				contentChanged = true;
			} else {
				linkingMode.setSelected(true);
			}
		}
		
		linkingMode.setText(linkingMode.isSelected() 
				? "取消关联 " : "关联文档");
		linkingMode.setToolTipText(linkingMode.isSelected() 
				? "取消文档关联" : "设置标题关联的文档");
		
		updateSubmitStatus();
	}

	/**
	 * Set a topic to edit.
	 * 
	 * @param topic The topic to edit.
	 */
	public void setTopic(ContentTreeNode node) {
		if (contentChanged) {
			if (JOptionPane.showConfirmDialog(this, "是否保存更改?") 
					== JOptionPane.OK_OPTION) {
				try {
					submit();
					owner.getConsole().hey("文件" + pageEditor.getFilePath() + "保存成功!");
				} catch (IOException e) {
					owner.getConsole().hey("文件" + pageEditor.getFilePath() + "保存失败!");
					owner.showConsole();
				}
			}
		}
		
		topic = node.getUserObject();
		treePath = new TreePath(node.getPath());
		
		final File htmlFile = new File(topic.getLocal());
		topicName.setText(topic.getName());
		
		boolean fileExist = htmlFile.exists();
		linkingMode.setSelected(fileExist);
		linkingMode.setText(fileExist ? "取消关联 " : "关联文档");
		linkingMode.setToolTipText(fileExist ? "取消文档关联" : "设置标题关联的文档");
		pageEditor.load(htmlFile.exists() ? htmlFile : null);
		contentChanged = false;
		updateSubmitStatus();
	}

	/**
	 * The following methods are used to listen changes 
	 * of the topic name field and page content field.
	 */
	@Override
	public void changedUpdate(DocumentEvent evt) {
		contentChanged = true;
		updateSubmitStatus();
	}

	@Override
	public void insertUpdate(DocumentEvent evt) {
		contentChanged = true;
		updateSubmitStatus();
	}

	@Override
	public void removeUpdate(DocumentEvent evt) {
		contentChanged = true;
		updateSubmitStatus();
	}

	public void updateSubmitStatus() {
		submit.setEnabled(contentChanged);
	}
	
	/**
	 * Submit changes of the topic.
	 * @throws IOException 
	 */
	public void submit() throws IOException {
		// Update the topic's attributes.
		topic.setName(topicName.getText());
		pageEditor.save();
		topic.setLocal(pageEditor.getFilePath());
		contentChanged = false;
		updateSubmitStatus();
	}

	/**
	 * Add a action listener for the submit button.
	 * 
	 * @param listener The listener to add.
	 */
	public void addSubmitListener(ActionListener listener) {
		submit.addActionListener(listener);
	}

	/**
	 * Remove the given action listener from the submit button.
	 * 
	 * @param listener The listener to Remove.
	 */
	public void removeSubmitListener(ActionListener listener) {
		submit.removeActionListener(listener);
	}
	
	public TreePath getTreePath() {
		return treePath;
	}

	public ContentElement getTopic() {
		return topic;
	}

	/**
	 * Get the page editor.
	 * 
	 * @return The page editor.
	 */
	public PageEditor getPageEditor() {
		return pageEditor;
	}
}