Eclipse RCP入门（创建一个日期选择器）

直接上代码。

package org.autumn.rcp.learn;

import java.util.Calendar;
import java.util.regex.Pattern;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;

public class DatepickerDialog extends Dialog {

	private Text date;
	private Table table;
	private TableItem selectedTableItem;
	private String[] months = { "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月" };
	private int[] daysOfMonth = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	private String[] days = { "日", "一", "二", "三", "四", "五", "六" };
	private int year;
	private int month;
	private int day;

	protected DatepickerDialog(Shell parentShell) {
		super(parentShell);
	}

	public DatepickerDialog(Shell shell, Text date) {
		this(shell);
		this.date = date;
		init();
	}

	private void init() {
		String dateStr = date.getText();
		if (Pattern.matches("^\\d{4}-\\d{1,2}-\\d{1,2}$", dateStr)) {
			String[] str = dateStr.split("-");
			year = Integer.parseInt(str[0]);
			month = Integer.parseInt(str[1]) - 1;
			day = Integer.parseInt(str[2]);
		} else {
			year = Calendar.getInstance().get(Calendar.YEAR);
			month = Calendar.getInstance().get(Calendar.MONTH);
			day = Calendar.getInstance().get(Calendar.DAY_OF_MONTH);
		}
	}

	@Override
	protected Control createContents(Composite parent) {
		parent.setLayout(new GridLayout(1, false));

		createYearMonthComposite(parent);

		table = new Table(parent, SWT.SINGLE | SWT.FULL_SELECTION | SWT.BORDER_SOLID);
		table.setHeaderVisible(true);
		table.setLinesVisible(true);
		createColumns(); // Create the columns
		fillDayCell();
		addTableListeners();

		return parent;
	}

	private void fillDayCell() {
		for (TableItem item : table.getItems()) {
			item.dispose();
		}

		Calendar calendar = Calendar.getInstance();
		calendar.set(year, month, 1);
		int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
		for (int i = 0, d = 0; i <= 5; i++) {
			TableItem item = new TableItem(table, SWT.NONE);
			for (int j = 0, n = table.getColumnCount(); j < n; j++) {
				if ((d == 0 && j < (dayOfWeek - 1)) || d >= daysOfMonth[month]) {
					continue;
				}
				item.setText(j, (++d + ""));
				if (d == day) { // 今天
					Color blue = getShell().getDisplay().getSystemColor(SWT.COLOR_BLUE);
					item.setForeground(j, blue);
				} else if (j == 0 || j == n - 1) { // 周末
					Color red = getShell().getDisplay().getSystemColor(SWT.COLOR_RED);
					item.setForeground(j, red);
				}
			}
		}
	}

	private void createYearMonthComposite(Composite parent) {
		Composite composite = new Composite(parent, SWT.NONE);
		GridLayout gl = new GridLayout(4, false);
		gl.horizontalSpacing = 15;
		composite.setLayout(gl);

		// 月份
		final Combo monthCombo = new Combo(composite, SWT.DROP_DOWN | SWT.READ_ONLY);
		monthCombo.setItems(months);
		monthCombo.select(month);

		monthCombo.addSelectionListener(new SelectionAdapter() {

			public void widgetSelected(SelectionEvent e) {
				month = monthCombo.getSelectionIndex();
				fillDayCell();
			}

		});

		// 年
		final Text yearText = new Text(composite, SWT.BORDER);
		yearText.setText("" + year);
		handleLeapYearCondition();

		Label plus = new Label(composite, SWT.NONE);
		plus.setText(" + ");
		plus.addMouseListener(new MouseAdapter() {

			public void mouseDown(MouseEvent e) {
				yearText.setText(++year + "");
				handleLeapYearCondition();
				fillDayCell();
			}

		});

		Label minus = new Label(composite, SWT.NONE);
		minus.setText(" - ");
		minus.addMouseListener(new MouseAdapter() {

			public void mouseDown(MouseEvent e) {
				yearText.setText(--year + "");
				handleLeapYearCondition();
				fillDayCell();
			}

		});
	}

	private void handleLeapYearCondition() {
		if (isLeapYear()) {
			daysOfMonth[1] = 29;
		} else {
			daysOfMonth[1] = 28;
		}
	}

	private void addTableListeners() {

		// 鼠标悬停时给选中单元格加黄色背景
		table.addListener(SWT.MouseHover, new Listener() {

			@Override
			public void handleEvent(Event event) {
				Point pt = new Point(event.x, event.y);
				selectedTableItem = table.getItem(pt);
				if (null == selectedTableItem) {
					return;
				}
				int column = getSelectedColumn(pt);
				String text = selectedTableItem.getText(column);
				if (null == text || text.trim().equals("")) {
					return;
				}
				Color yellow = getShell().getDisplay().getSystemColor(SWT.COLOR_YELLOW);
				selectedTableItem.setBackground(column, yellow);
			}

		});

		// 鼠标移动时给选中单元格加白色背景
		table.addListener(SWT.MouseMove, new Listener() {

			@Override
			public void handleEvent(Event event) {
				Point pt = new Point(event.x, event.y);
				selectedTableItem = table.getItem(pt);
				if (null == selectedTableItem) {
					return;
				}
				Color white = getShell().getDisplay().getSystemColor(SWT.COLOR_WHITE);
				selectedTableItem.setBackground(getSelectedColumn(pt), white);
			}

		});

		// 鼠标进入时返回选中的日期字符串
		table.addListener(SWT.MouseDown, new Listener() {

			@Override
			public void handleEvent(Event event) {
				Point pt = new Point(event.x, event.y);
				selectedTableItem = table.getItem(pt);
				if (null == selectedTableItem) {
					return;
				}
				String day = selectedTableItem.getText(getSelectedColumn(pt));
				date.setText(year + "-" + (month + 1) + "-" + day);
				setReturnCode(OK);
				close();
			}

		});

	}

	private boolean isLeapYear() {
		return ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0));
	}

	private int getSelectedColumn(Point pt) {
		int column = 0;
		for (int i = 0, n = table.getColumnCount(); i < n; i++) {
			Rectangle rect = selectedTableItem.getBounds(i);
			if (rect.contains(pt)) {
				column = i;
				break;
			}
		}
		return column;
	}

	private TableColumn[] createColumns() {
		TableColumn[] columns = new TableColumn[days.length];
		for (int i = 0, n = columns.length; i < n; i++) {
			columns[i] = new TableColumn(table, SWT.RIGHT);

			// This text will appear in the column header
			columns[i].setText(days[i]);
			columns[i].pack();
		}
		return columns;
	}

}

效果图如下：

评论

3 楼 tangweicong 2012-03-06  

cutesunshineriver 写道

tangweicong 写道

楼主，我想做个table的行鼠标悬停背景颜色改变的效果，运行了你的代码，那效果太烂了啊！！给我出出主意吧

SWT本身是有提供日期小部件的，是org.eclipse.swt.widgets.DateTime这个类。使用示例语法如下：DateTime date = new DateTime(composite, SWT.CALENDAR)。

我不是想做日期控件，我只是想做一个展示数据的table，要求它的行有网页那样的鼠标悬停效果

2 楼 cutesunshineriver 2012-03-05  

tangweicong 写道

楼主，我想做个table的行鼠标悬停背景颜色改变的效果，运行了你的代码，那效果太烂了啊！！给我出出主意吧

SWT本身是有提供日期小部件的，是org.eclipse.swt.widgets.DateTime这个类。使用示例语法如下：DateTime date = new DateTime(composite, SWT.CALENDAR)。

1 楼 tangweicong 2012-03-04  

楼主，我想做个table的行鼠标悬停背景颜色改变的效果，运行了你的代码，那效果太烂了啊！！给我出出主意吧