org.eclipse.ui.externaltools/External Tools/org/eclipse/ui/externaltools/internal/ui/AddTaskDialog.java

package org.eclipse.ui.externaltools.internal.ui;

/**********************************************************************
Copyright (c) 2002 IBM Corp. and others.
All rights reserved.   This program and the accompanying materials
are made available under the terms of the Common Public License v0.5
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v05.html
 
Contributors:
**********************************************************************/
import java.net.URL;

import org.eclipse.ant.core.AntCorePlugin;
import org.eclipse.jface.dialogs.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.externaltools.internal.core.ToolMessages;
import org.eclipse.ui.help.WorkbenchHelp;

import org.eclipse.jface.dialogs.Dialog;

/**
 * Dialog to prompt the user to add a custom ant task or type.
 */
public class AddTaskDialog extends Dialog {
	private String title;
	private String description;

	//task/type attributes
	private String taskName;
	private String className;
	private URL library;

	//widgets
	private Button okButton;
	private Text nameField;
	private Text classField;
	private Combo libraryField;

	private URL[] libraryUrls;

	/**
	 * Creates a new task dialog with the given shell and title.
	 */
	protected AddTaskDialog(
		Shell parentShell,
		String title,
		String description) {
		super(parentShell);
		this.title = title;
		this.description = description;
	}
	/**
	 * @see Window#configureShell(Shell)
	 */
	protected void configureShell(Shell newShell) {
		super.configureShell(newShell);
		newShell.setText(title);
		WorkbenchHelp.setHelp(newShell, IHelpContextIds.ADD_TASK_DIALOG);
	}
	/**
	 * @see Dialog#createButtonsForButtonBar(Composite)
	 */
	protected void createButtonsForButtonBar(Composite parent) {
		okButton =
			createButton(
				parent,
				IDialogConstants.OK_ID,
				IDialogConstants.OK_LABEL,
				true);
		createButton(
			parent,
			IDialogConstants.CANCEL_ID,
			IDialogConstants.CANCEL_LABEL,
			false);
		updateEnablement();
	}
	/**
	 * @see Dialog#createDialogArea(Composite)
	 */
	protected Control createDialogArea(Composite parent) {
		Composite dialogArea = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginHeight = 10;
		layout.marginWidth = 10;
		dialogArea.setLayout(layout);

		Label label = new Label(dialogArea, SWT.NONE);
		label.setText(description);
		GridData data = new GridData(GridData.FILL_HORIZONTAL);
		data.horizontalSpan = 2;
		label.setLayoutData(data);

		label = new Label(dialogArea, SWT.NONE);
		label.setText(ToolMessages.getString("AddTaskDialog.name")); //$NON-NLS-1$;
		nameField = new Text(dialogArea, SWT.BORDER);
		data = new GridData(GridData.FILL_HORIZONTAL);
		data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
		nameField.setLayoutData(data);
		nameField.addModifyListener(new ModifyListener() {
			public void modifyText(ModifyEvent e) {
				updateEnablement();
			}
		});

		label = new Label(dialogArea, SWT.NONE);
		label.setText(ToolMessages.getString("AddTaskDialog.class")); //$NON-NLS-1$;
		classField = new Text(dialogArea, SWT.BORDER);
		data = new GridData(GridData.FILL_HORIZONTAL);
		data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
		classField.setLayoutData(data);
		classField.addModifyListener(new ModifyListener() {
			public void modifyText(ModifyEvent e) {
				updateEnablement();
			}
		});

		label = new Label(dialogArea, SWT.NONE);
		label.setText(ToolMessages.getString("AddTaskDialog.library")); //$NON-NLS-1$;
		libraryField = new Combo(dialogArea, SWT.READ_ONLY | SWT.BORDER);
		data = new GridData(GridData.FILL_HORIZONTAL);
		data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
		libraryField.setLayoutData(data);
		libraryField.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				updateEnablement();
			}
		});

		//populate library combo and select input library
		libraryUrls =
			AntCorePlugin.getPlugin().getPreferences().getCustomURLs();
		int selection = 0;
		for (int i = 0; i < libraryUrls.length; i++) {
			libraryField.add(libraryUrls[i].getFile());
			if (libraryUrls[i].equals(library))
				selection = i;
		}

		//intialize fields
		if (taskName != null)
			nameField.setText(taskName);
		if (className != null)
			classField.setText(className);
		if (libraryUrls.length >= 0)
			libraryField.select(selection);
		return dialogArea;
	}

	public String getClassName() {
		return className;
	}
	public void setClassName(String className) {
		this.className = className;
	}
	public URL getLibrary() {
		return library;
	}
	/**
	 * @see Dialog#okPressed()
	 */
	protected void okPressed() {
		className = classField.getText();
		taskName = nameField.getText();
		int selection = libraryField.getSelectionIndex();
		if (selection >= 0)
			library = libraryUrls[selection];
		super.okPressed();
	}
	public void setLibrary(URL library) {
		this.library = library;
	}
	public String getTaskName() {
		return taskName;
	}
	public void setTaskName(String taskName) {
		this.taskName = taskName;
	}
	private void updateEnablement() {
		if (okButton != null)
			okButton.setEnabled(
				nameField.getText().length() > 0
					&& classField.getText().length() > 0
					&& libraryField.getSelectionIndex() >= 0);
	}
}