tomcatprojectwarpropertypage.java

一个学习eclipse插件开发的绝好入门程序

package com.sysdeo.eclipse.tomcat;

/*
 * (c) Copyright Sysdeo SA 2001, 2002.
 * All Rights Reserved.
 */

import java.io.File;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

public class TomcatProjectWARPropertyPage implements TomcatPluginResources {

	private Button exportSourceCheck;
	private Text warLocationText;
	private Text rootDirText;
	private TomcatProjectPropertyPage page;

	private static final int TEXT_FIELD_WIDTH = 200;

	public TomcatProjectWARPropertyPage(TomcatProjectPropertyPage page) {
		this.page = page;
	}

	/**
	 * returns a control which consists of the ui elements of this page
	 */
	protected Control createContents(Composite parent) {
		Composite composite = new Composite(parent, SWT.NULL);
		composite.setLayout(new GridLayout());

		createWarLocationGroup(composite);

		return composite;
	}

	public void createWarLocationGroup(Composite parent) {
		Composite warLocationGroup = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = 3;
		warLocationGroup.setLayout(layout);
		warLocationGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		// location label
		Label warLocationLabel = new Label(warLocationGroup, SWT.NONE);
		warLocationLabel.setText(WIZARD_PROJECT_WARLOCATION_LABEL);
		warLocationLabel.setEnabled(true);

		// project location entry field
		warLocationText = new Text(warLocationGroup, SWT.BORDER);
		GridData data = new GridData(GridData.FILL_HORIZONTAL);
		data.widthHint = TEXT_FIELD_WIDTH;
		warLocationText.setLayoutData(data);
		warLocationText.setText(this.getWarLocation());
		warLocationText.setEnabled(true);

		Button browseButton = new Button(warLocationGroup, SWT.PUSH);
		browseButton.setText(BROWSE_BUTTON_LABEL);
		browseButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent evt) {
				String newValue = warFieldChange();
				if (newValue != null) {
					warLocationText.setText(newValue);
				}
			}
		});

		browseButton.setEnabled(true);

		exportSourceCheck = new Button(warLocationGroup, SWT.CHECK | SWT.LEFT);
		exportSourceCheck.setText(WIZARD_PROJECT_EXPORTSOURCE_LABEL);
		data = new GridData();
		data.horizontalSpan = 3;
		exportSourceCheck.setLayoutData(data);
		exportSourceCheck.setEnabled(true);
		exportSourceCheck.setSelection(this.getExportSource());
	}

	protected String getWarLocation() {
		String result = "";
		try {
			TomcatProject prj = page.getTomcatProject();
			if (prj != null)
				result = prj.getWarLocation();
		} catch (CoreException ex) {
			// result = "";
		}
		return result;
	}

	protected boolean getExportSource() {
		boolean result = false;
		try {
			TomcatProject prj = page.getTomcatProject();
			if (prj != null)
				result = prj.getExportSource();
		} catch (CoreException ex) {
			// result = false;
		}
		return result;
	}

	/**
	 * performes the ok action for this property page
	 */
	public boolean performOk() {
		try {
			TomcatProject prj = page.getTomcatProject();
			prj.setWarLocation(warLocationText.getText());
			prj.setExportSource(exportSourceCheck.getSelection());
			prj.saveProperties();
		} catch (Exception ex) {
			TomcatLauncherPlugin.log(ex.getMessage());
		}

		return true;
	}

	protected String warFieldChange() {
		File f = new File(warLocationText.getText());
		if (!f.exists())
			f = null;
		File d = getFile(f);
		if (d == null)
			return null;

		return d.getAbsolutePath();
	}


	/**
	 * Helper to open the file chooser dialog.
	 */
	private File getFile(File startingDirectory) {

		FileDialog dialog = new FileDialog(page.getShell(), SWT.OPEN);
		if (startingDirectory != null)
			dialog.setFileName(startingDirectory.getPath());
		//	if (extensions != null)
		//		dialog.setFilterExtensions(extensions);
		String file = dialog.open();
		if (file != null) {
			file = file.trim();
			if (file.length() > 0)
				return new File(file);
		}

		return null;
	}

}