watcherwindow.java

aglet的部分源码

package examples.patterns;

/*
 * @(#)WatcherWindow.java
 * 
 * 03L7246 (c) Copyright IBM Corp. 1996, 1998
 * 
 * The program is provided "as is" without any warranty express or
 * implied, including the warranty of non-infringement and the implied
 * warranties of merchantibility and fitness for a particular purpose.
 * IBM will not be liable for any damages suffered by you as a result
 * of using the Program. In no event will IBM be liable for any
 * special, indirect or consequential damages or lost profits even if
 * IBM has been advised of the possibility of their occurrence. IBM
 * will not be liable for any third party claims against you.
 */

import com.ibm.aglet.*;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Choice;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Event;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Label;
import java.awt.List;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.TextArea;
import java.awt.Color;
import java.awt.Insets;

import java.net.URL;
import java.net.MalformedURLException;

import java.util.Vector;
import java.util.Enumeration;
import java.util.Properties;

/**
 * Class WatcherWindow represents the main window for user interaction
 * with the Watcher.
 * 
 * @see Watcher
 * @version     1.00    96/12/28
 * @author      Danny B. Lange
 * @author      Yoshiaki Mima
 * @author      Yariv Aridor
 */

public class WatcherWindow extends SampleWindow {
	private static final String TITLE = "Watcher";
	private static final String NO_FILENAME_MSG = 
		"Please input a valid file name.";
	private PopUpMessageWindow _noFileNameWindow = null;

	// -- Main panel

	private Choice _chkInterval = new Choice();
	private Choice _duration = new Choice();
	private Choice _stay = new Choice();

	// Constructs the FileWatch dialog window.
	// 
	public WatcherWindow(Watcher aglet) throws AgletException {
		super(aglet);
		_noFileNameWindow = new PopUpMessageWindow(this, "NO FILE NAME", 
												   NO_FILENAME_MSG);
		makeMainPanel();
		displayFrame(this);
	}
	// --  The call back methods

	protected void go() {
		String url = _addressChooser.getAddress();
		String path = _filepath.getText().trim();
		String selection;
		double interval = 1.0 / 360;
		double duration = 0;
		boolean stay = false;

		// set interval
		selection = _chkInterval.getSelectedItem();
		if (selection.equals("10 seconds")) {
			interval = 1.0 / (3600 / 10);
		} else if (selection.equals("30 seconds")) {
			interval = 1.0 / (3600 / 30);
		} else if (selection.equals("1 minute")) {
			interval = 1.0 / (3600 / 60);
		} else if (selection.equals("1 hour")) {
			interval = 1.0;
		} else if (selection.equals("half a day")) {
			interval = 12.0;
		} else if (selection.equals("1 day")) {
			interval = 24.0;
		} 

		// set ingterval
		selection = _duration.getSelectedItem();
		if (selection.equals("1 minute")) {
			duration = 1 / 60.0;
		} else if (selection.equals("2 minutes")) {
			duration = 2 / 60.0;
		} else if (selection.equals("5 minutes")) {
			duration = 5 / 60.0;
		} else if (selection.equals("10 minutes")) {
			duration = 10 / 60.0;
		} else if (selection.equals("1 hour")) {
			duration = 1.0;
		} else if (selection.equals("2 hours")) {
			duration = 2.0;
		} else if (selection.equals("6 hours")) {
			duration = 6.0;
		} else if (selection.equals("24 hours")) {
			duration = 24.0;
		} 

		if (_stay.getSelectedItem().equals("Yes")) {
			stay = true;
		} 

		if (url.equals("")) {
			_malFormedURLWindow.popup(this);
		} else if (path.equals("")) {
			_noFileNameWindow.popup(this);
		} else {
			try {
				((Watcher)_aglet).go(new URL(url), interval, duration, stay, 
									 path);
			} catch (MalformedURLException e) {
				_malFormedURLWindow.popup(this);
			} 
		} 
	}
	private void makeMainPanel() throws AgletException {
		Component comp;

		_result.setEditable(false);

		// button
		constraints.anchor = GridBagConstraints.CENTER;
		constraints.gridwidth = GridBagConstraints.REMAINDER;
		constraints.fill = GridBagConstraints.BOTH;
		constraints.weightx = 1.0;
		comp = makeMainButtonPanel();
		layout.setConstraints(comp, constraints);
		add(comp);

		// title
		constraints.anchor = GridBagConstraints.WEST;
		constraints.gridwidth = GridBagConstraints.REMAINDER;
		constraints.fill = GridBagConstraints.BOTH;
		constraints.weightx = 1.0;
		comp = new Label(TITLE);
		comp.setFont(new Font(getFont().getName(), Font.BOLD, 
							  getFont().getSize() + 1));
		layout.setConstraints(comp, constraints);
		add(comp);

		// information settings
		// addLabeledComponent(URLLabel, _URLString);
		// initURLFields(getHotlist(_aglet));    // hotlist & URL field
		// addLabeledComponent(hotlistLabel, _hotlist);

		constraints.gridwidth = GridBagConstraints.REMAINDER;
		constraints.fill = GridBagConstraints.HORIZONTAL;
		constraints.insets = new Insets(0, 0, 10, 0);
		constraints.weightx = 1.0;
		comp = _addressChooser;
		layout.setConstraints(comp, constraints);
		add(comp);

		// file name panel
		addLabeledComponent("File Name (Full Path):", _filepath);

		// setting parameters for the Notifier
		constraints.anchor = GridBagConstraints.WEST;
		constraints.gridwidth = GridBagConstraints.REMAINDER;
		constraints.fill = GridBagConstraints.BOTH;
		comp = makeParamPanel();
		layout.setConstraints(comp, constraints);
		add(comp);

		// panel for showing the result
		constraints.gridwidth = GridBagConstraints.REMAINDER;
		constraints.fill = GridBagConstraints.BOTH;
		comp = _result;
		layout.setConstraints(comp, constraints);
		add(comp);

		// area for error messages
		constraints.gridwidth = GridBagConstraints.REMAINDER;
		constraints.fill = GridBagConstraints.BOTH;
		initMessagePanel();
		comp = _msgLine;
		layout.setConstraints(comp, constraints);
		add(comp);
	}
	// --  Parameters Panel
	// 
	private Panel makeParamPanel() {
		Panel p = new Panel();

		p.setLayout(new FlowLayout(FlowLayout.LEFT));

		_chkInterval.addItem("10 seconds");
		_chkInterval.addItem("30 seconds");
		_chkInterval.addItem("1 minute");
		_chkInterval.addItem("1 hour");
		_chkInterval.addItem("half a day");
		_chkInterval.addItem("1 day");
		p.add(makeSingleField("Check Interval(sec)", _chkInterval));

		_duration.addItem("1 minute");
		_duration.addItem("2 minutes");
		_duration.addItem("5 minutes");
		_duration.addItem("10 minutes");
		_duration.addItem("1 hour");
		_duration.addItem("2 hours");
		_duration.addItem("6 hours");
		_duration.addItem("24 hours");
		p.add(makeSingleField("Duration", _duration));

		_stay.addItem("Yes");
		_stay.addItem("No");
		p.add(makeSingleField("Keep Notifing?", _stay));

		return p;
	}
	// --  Event handler methods
	protected boolean popUpHandleButton(Button button) {
		if ((button == _noFileNameWindow.getButton(MessageDialog.OKAY)) 
				&& "Okay".equals(button.getLabel())) {
			_noFileNameWindow.setVisible(false);
			return true;
		} 

		if (button == _malFormedURLWindow.getButton(MessageDialog.OKAY) 
				&& "Okay".equals(button.getLabel())) {
			_malFormedURLWindow.setVisible(false);
			return true;
		} 

		return false;		// -- should not reach here.
	}
}