Eclipse插件从无到有–1.2给插件加入一个视图

给插件加入一个视图
1. plugin.xml 中加入一个扩展.<catagory/>是目录位置。<view/> 是视图的属性

	<extension point="org.eclipse.ui.views">
	    <category name="stools" id="zhch.illq.stools"/>
	    <view name="Nothing View" icon="icons/stools.gif"
	          category="zhch.illq.stools"
	          class="zhch.illq.stools.views.NothingView"
	          id="zhch.illq.stools.views.NothingView">
	    </view>
	 </extension>

2. 实现类继承org.eclipse.ui.part.ViewPart，要覆盖两个接口方法

package zhch.illq.stools.views;

import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.ViewPart;

public class NothingView extends ViewPart {
	@Override
	public void createPartControl(Composite arg0) {
	}
	@Override
	public void setFocus() {
	}
}

    2.1 OK，运行一下，Window -> show view -> other,找到stools打开，就是一个空白的视图。
3. 给视图添加几个控件。
    视图的各种布局参照org.eclipse.swt.layout包，控件主要在org.eclipse.swt.widgets包中。还有Eclipse提供的各种viewer,在org.eclipse.jface.viewers包中。

package zhch.illq.stools.views;


import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.part.ViewPart;

public class NothingView extends ViewPart {
	private Composite panel;
	private Label label;
	private Text name;
	private Label label2;
	@Override
	public void createPartControl(Composite parent) {
		Layout layout = new FillLayout(SWT.VERTICAL);
		parent.setLayout(layout);
		
		panel = new Composite(parent, SWT.NONE);
		panel.setLayout(new FillLayout(SWT.HORIZONTAL));
		
		label = new Label(panel,SWT.NONE);  
		label.setText("name:");
		name = new Text(panel, SWT.NONE);
		
		label2 = new Label(parent, SWT.NONE);
		label2.setText("Here is a label.");
	}
	@Override
	public void setFocus() {
	}
}

    3.1 OK，运行一下，FillLayout就是一个水平或垂直平分的布局。
4. 给控件加入事件响应

    public void createPartControl(Composite parent) {
		...
		label2 = new Label(parent, SWT.NONE);
		label2.setText("Here is a label.");
		setListener();
        ...
    }

	private void setListener(){
		label2.addMouseListener(new MouseAdapter(){
			public void mouseDoubleClick(MouseEvent e) {
				((Label)e.getSource()).setText(name.getText());
			}
		});
	}

4.1 OK运行一下。双击label2, label2的内容被设置为text框的内容


总结一下：
扩展点

   菜单：<extension point="org.eclipse.ui.actionSets">
   视图：<extension point="org.eclipse.ui.views">