addressformeditor.java

eclipse开发笔记

package com.plugindev.addressbook.editors;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IEditorActionBarContributor;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.forms.widgets.FormToolkit;

import com.plugindev.addressbook.Activator;
import com.plugindev.addressbook.editors.models.IManagerListener;
import com.plugindev.addressbook.editors.models.SimpleFormEditorInput;

//在13.7节实现了IManagerListener接口
public class AddressFormEditor extends FormEditor implements IManagerListener{
/*	private StyledText text;*/

	private boolean isPageModified;
	
	private boolean sourceChanged;
	
	//获得页面
	private MasterDetailsPage mdPage;
	private PageWithSubPages pwsPage;
	private SourcePage sourcePage;
	
	
	public AddressFormEditor() {
	}
	protected void addPages() {
		try {
			//在16章改变该段代码
			mdPage = new MasterDetailsPage(this);
			pwsPage = new PageWithSubPages(this);
			sourcePage = new SourcePage(this);
			addPage(mdPage);
			addPage(pwsPage);
			addPage(sourcePage);
			
/*			addPage(new MasterDetailsPage(this));
			addPage(new PageWithSubPages(this));
			addPage(new SourcePage(this));*/
		} catch (PartInitException e) {
			e.printStackTrace();
		}
		updateTitle();
		
		//在13.7节中加入此段代码
		((SimpleFormEditorInput)getEditorInput()).getManager().addManagerListener(this);
		//结束在13.7节中此段代码的加入
	}
	void updateTitle(){
		IEditorInput input = getEditorInput();
		setPartName(input.getName());
		setTitleToolTip(input.getToolTipText());
	}
	protected FormToolkit createToolkit(Display display) {
		// Create a toolkit that shares colors between editors.
		return new FormToolkit(Activator.getDefault().getFormColors(
				display));
	}
	

	@Override
	public void doSave(IProgressMonitor monitor) {
		//在13.7节加入此段代码
		if(isPageModified){
			((SimpleFormEditorInput)getEditorInput()).getManager().saveDescriptions();
			sourceChanged = true;
		}
		isPageModified = false;
		if(this.getActivePage() == 2)
		{
			SourcePage page= (SourcePage)getSelectedPage();
			page.loadSource();
			sourceChanged = false;
		}
		editorDirtyStateChanged();
		updateTitle();
		//结束在13.7节对此段代码的加入
	}
	public boolean isDirty(){
		//在13.7节中加入此段代码
		return isPageModified||super.isDirty();
		//结束在13.7节中此段代码的加入
	}
	@Override
	public void doSaveAs() {
	}

	@Override
	public boolean isSaveAsAllowed() {
		return false;
	}
	public void pageChange(int newPageIndex){
		//在13.7节中加入此段代码
		switch(newPageIndex){
		case 0:
			break;
		case 1:
			if(isPageModified)
			{
				PageWithSubPages page = (PageWithSubPages)getSelectedPage();
				page.updateSelection();
			}
			break;
		case 2:
			SourcePage page = (SourcePage)getSelectedPage();
			if(sourceChanged == true){
				page.loadSource();
				sourceChanged = false;
			}
			break;
		}
		super.pageChange(newPageIndex);
		//结束在13.7节中此段代码的加入
		
		//在13.8节中加入此段代码
		 IEditorActionBarContributor contributor = 
	         getEditorSite().getActionBarContributor();
	      if (contributor instanceof AddressFormEditorContributor)
	         ((AddressFormEditorContributor) contributor)
	            .setActivePage(this, newPageIndex);
	      //结束在13.8节中此段代码的加入
	}

	public void dispose(){
		/*临时实现，将在13.7小节更改
		 * ((SimpleFormEditorInput)getEditorInput()).getManager().saveDescriptions();
		 * */
		
		super.dispose();
	}
	public int getActivePage(){
		return super.getActivePage();
	}
	/*
	 * 在13.7节实现了managerChanged()方法
	 * @see com.plugindev.addressbook.editors.models.IManagerListener#managerChanged(java.lang.Object[], java.lang.String, java.lang.String, java.lang.String)
	 */
	public void managerChanged(Object object, String type, String itemType, String key) {
		if(isPageModified == false){
			isPageModified = true;
			editorDirtyStateChanged();
		}
	}
}