关于编辑器Dirty的处理

今天开始做些小的总结，因为Eclipse插件方面做了不少东西了，也该总结总结学习到的东西了！

为了增加普遍性，例子使用的Editor继承自最简单的EditorPart来制作。

 

程序里的说明，作为帮助吧！

 

package ztestpluginproject.editors.zeditors;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.forms.widgets.ColumnLayout;
import org.eclipse.ui.forms.widgets.ColumnLayoutData;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.ui.forms.widgets.Section;
import org.eclipse.ui.part.EditorPart;

public class ZTestEditor extends EditorPart {
	
	// 简单情况下可以自己制作一个标志来记录当前编辑器状况 
	public boolean isDirty = false;

	@Override
	public void doSave(IProgressMonitor monitor) {
		this.isDirty = false; // 先将标志设置为false
		this.firePropertyChange(PROP_DIRTY); // 通知编辑器要修改状态了
	}

	@Override
	public void doSaveAs() {
	}

	@Override
	public void init(IEditorSite site, IEditorInput input)
			throws PartInitException {
		this.setInput(input);
		this.setSite(site);
		this.setPartName(input.getName());//设置标签为 文件名
	}

	@Override
	public boolean isDirty() {
		//firePropertyChange(PROP_DIRTY) 将根据这里返回的值，来修改编辑器状态（保存或者未保存<*>）
		return this.isDirty;
	}

	@Override
	public boolean isSaveAsAllowed() {
		return false;
	}

	@Override
	public void createPartControl(Composite parent) {
		
		// 这里新建了一个表单 放了三个文本框
		final FormToolkit toolkit = new FormToolkit(parent.getDisplay());
		
		ColumnLayout layout = new ColumnLayout();
		layout.horizontalSpacing = 5;
		layout.verticalSpacing = 5;
		parent.setLayout(layout);
		
		Section section = toolkit.createSection(parent, Section.TWISTIE|Section.TITLE_BAR);
		Composite compo = toolkit.createComposite(section, SWT.NONE);
		ColumnLayout layoutSection = new ColumnLayout();
		compo.setLayout(layoutSection);
		section.setClient(compo);
		section.setExpanded(true);
		
		// 文本框内容变动监听器
		TxtChangeListener listener = new TxtChangeListener();
		
		Text txtName = toolkit.createText(compo, "Mike", SWT.NONE);
		ColumnLayoutData td = new ColumnLayoutData();
		txtName.setLayoutData(td);
		txtName.addModifyListener(listener);
		
		Text txtAge = toolkit.createText(compo, "22", SWT.NONE);
		td = new ColumnLayoutData();
		txtAge.setLayoutData(td);
		txtAge.addModifyListener(listener);
		
		Text txtSex = toolkit.createText(compo, "m", SWT.NONE);
		td = new ColumnLayoutData();
		txtSex.setLayoutData(td);
		txtSex.addModifyListener(listener);
		
	}
	
	// 制作监听器 ，这里是对Text进行监听使用ModifyListener
	//如果是TextField（awt包下）之类的有DocumentListener，此处不再赘述
	class TxtChangeListener implements ModifyListener {
		@Override
		public void modifyText(ModifyEvent e) {
			System.out.println("ok");
			isDirty = true;
			ZTestEditor.this.firePropertyChange(PROP_DIRTY);
		}
	}
	
	@Override
	public void setFocus() {
	}

}