JFace TableViewer初入

[align=center]TableViewer初入[/align]
本例會實現些效果

[img]/upload/attachment/58535/9b140e23-d3c3-3c82-8be6-ce8077157ed3.jpg[/img]
右鍵菜單

[img]/upload/attachment/58537/e337047b-a66d-311d-bb32-671073129f27.gif[/img]
雙擊一行

[img]/upload/attachment/58545/2bccc6b5-c272-3fca-8534-975ec157afd5.gif[/img]


首先新建PeopleEntity,此類爲假想數據表entity

package com.mypractice;

import java.util.Date;

public class PeopleEntity {

	private Long id;

	private String name;

	private boolean sex;

	private int age;

	private Date createDate;

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public Date getCreateDate() {
		return createDate;
	}

	public void setCreateDate(Date createDate) {
		this.createDate = createDate;
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public boolean isSex() {
		return sex;
	}

	public void setSex(boolean sex) {
		this.sex = sex;
	}
}

然後創建PeopleFactory,用來生成PeopleEntity

package com.mypractice;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class PeopleFactory {

	public static List<PeopleEntity> getPeoples() {
		List<PeopleEntity> list = new ArrayList<PeopleEntity>();
		{
			PeopleEntity o = new PeopleEntity();
			o.setId(new Long(1));
			o.setName("趙雲");
			o.setSex(true);
			o.setAge(28);
			o.setCreateDate(new Date());
			list.add(o);
		}

		{
			PeopleEntity o = new PeopleEntity();
			o.setId(new Long(2));
			o.setName("關羽");
			o.setSex(true);
			o.setAge(20);
			o.setCreateDate(new Date());
			list.add(o);
		}
		{
			PeopleEntity o = new PeopleEntity();
			o.setId(new Long(3));
			o.setName("曹操");
			o.setSex(true);
			o.setAge(23);
			o.setCreateDate(new Date());
			list.add(o);
		}
		{
			PeopleEntity o = new PeopleEntity();
			o.setId(new Long(4));
			o.setName("張飛");
			o.setSex(false);
			o.setAge(30);
			o.setCreateDate(new Date());
			list.add(o);
		}
		return list;
	}
}

創建OpenAction,生成右鍵菜單"打開"

package com.mypractice;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TableViewer;

public class OpenAction extends Action {

	private TableViewer tv;

	public OpenAction(TableViewer tv) {
		this.tv = tv;
		setText("打開");
	}

	public void run() {
		IStructuredSelection selection = (IStructuredSelection) tv.getSelection();
		PeopleEntity o = (PeopleEntity) selection.getFirstElement();
		if(o == null)
			MessageDialog.openInformation(null, null, "請先選擇記錄");
		else
			MessageDialog.openInformation(null, null, o.getName());
	}
}

創建RefreshAction類 生成右鍵菜單"刷新"

package com.mypractice;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.TableViewer;

public class RefreshAction extends Action {

	private TableViewer tv;

	public RefreshAction(TableViewer tv) {
		this.tv = tv;
		setText("刷新");
	}

	public void run() {
		tv.refresh();//表格的刷新方法,界面會重新讀取數據並顯示
	}
}

創建MyActionGroup 管理Action

package com.mypractice;

import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.Table;
import org.eclipse.ui.actions.ActionGroup;

public class MyActionGroup extends ActionGroup {

	private TableViewer tv;

	public MyActionGroup(TableViewer tv) {
		this.tv = tv;
	}

	public void fillContextMenu(IMenuManager mgr) {
		MenuManager menuManager = (MenuManager) mgr;
		menuManager.add(new OpenAction(tv));
		menuManager.add(new RefreshAction(tv));

		Table table = tv.getTable();
		Menu menu = menuManager.createContextMenu(table);
		table.setMenu(menu);
	}
}

創建TableViewerContentProvider 內空提供器,用來對輸入到表格的數據進行過濾

package com.mypractice;

import java.util.List;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;

public class TableViewerContentProvider implements IStructuredContentProvider {

	public Object[] getElements(Object inputElement) {
		if(inputElement instanceof List)
			return ((List) inputElement).toArray();
		return new Object[0];
	}

	/**
	 * 當TableViewer對象被關閉時觸發執行此方法
	 */
	public void dispose() {

	}

	/**
	 * 當TableViewer再次調用setInput()時觸發此方法執行
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

	}

}

創建TableViewerLabelProvider 對單個對象進行處理和轉化,決定實體顯示位置

package com.mypractice;

import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.swt.graphics.Image;

public class TableViewerLabelProvider implements ITableLabelProvider {

	private Image[] images = new Image[]{
			new Image(null, "icons/star.gif"),
			new Image(null, "icons/refresh.gif"),
			new Image(null, "icons/3.gif")
	};

	public Image getColumnImage(Object element, int columnIndex) {
		PeopleEntity o = (PeopleEntity) element;
		if(o.getName().equals("趙雲") || o.getName().equals("張飛")) {
			if(columnIndex == 0)
				return images[0];
			if(columnIndex == 2)
				return o.isSex() ? images[1] : images[2];
		}
		return null;
	}

	public String getColumnText(Object element, int columnIndex) {
		PeopleEntity o = (PeopleEntity) element;
		if(columnIndex == 0)
			return o.getId().toString();
		if(columnIndex == 1)
			return o.getName();
		if(columnIndex == 2)
			return o.isSex() ? "男" : "女";
		if(columnIndex == 3)
			return String.valueOf(o.getAge());
		if(columnIndex == 4)
			return o.getCreateDate().toString();
		return null;
	}

	public void addListener(ILabelProviderListener listener) {

	}

	public void dispose() {
		for(Image image : images) {
			image.dispose();
		}
	}

	public boolean isLabelProperty(Object element, String property) {
		return false;
	}

	public void removeListener(ILabelProviderListener listener) {

	}
}

最後創建ShowTable

package com.mypractice;

import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;

public class ShowTable {

	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		TableViewer tv = new TableViewer(shell, SWT.MULTI | SWT.BORDER
				| SWT.FULL_SELECTION);
		Table table = tv.getTable();
		table.setHeaderVisible(true);
		table.setLinesVisible(true);
		TableLayout layout = new TableLayout();
		table.setLayout(layout);

		layout.addColumnData(new ColumnWeightData(13));
		new TableColumn(table, SWT.NONE).setText("ID號");

		layout.addColumnData(new ColumnWeightData(40));
		new TableColumn(table, SWT.NONE).setText("姓名");

		layout.addColumnData(new ColumnWeightData(20));
		new TableColumn(table, SWT.NONE).setText("性別");

		layout.addColumnData(new ColumnWeightData(20));
		new TableColumn(table, SWT.NONE).setText("年齡");

		layout.addColumnData(new ColumnWeightData(60));
		new TableColumn(table, SWT.NONE).setText("記錄建立時間");

		tv.setContentProvider(new TableViewerContentProvider());

		tv.setLabelProvider(new TableViewerLoabelProvider());
		Object data = PeopleFactory.getPeoples();

		tv.setInput(data);
		ShowTable show = new ShowTable();
		show.addListener(tv);

		MyActionGroup actionGroup = new MyActionGroup(tv);
		actionGroup.fillContextMenu(new MenuManager());
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
	}

	private void addListener(TableViewer tv) {
		tv.addDoubleClickListener(new IDoubleClickListener(){

			public void doubleClick(DoubleClickEvent event) {
				IStructuredSelection selection = (IStructuredSelection) event.getSelection();
				PeopleEntity o = (PeopleEntity) selection.getFirstElement();

				MessageDialog.openInformation(null, "提示", o.getName());
			}

		});

		//選擇事件(單擊)
		tv.addSelectionChangedListener(new ISelectionChangedListener() {

			public void selectionChanged(SelectionChangedEvent event) {
//				IStructuredSelection selection = (IStructuredSelection) event.getSelection();
//				PeopleEntity o = (PeopleEntity) selection.getFirstElement();
//				MessageDialog.openInformation(null, "提示", o.getName() + "年齡是" + o.getAge());
			}

		});
	}
}