/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.debug.ui;

 
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;

/**
 * An error dialog which allows the user to set
 * a boolean preference.
 * 
 * This is typically used to set a preference that
 * determines if the dialog should be shown in
 * the future
 */
public class ErrorDialogWithToggle extends ErrorDialog {

	/**
	 * The preference key which is set by the toggle button.
	 * This key must be a boolean preference in the preference store.
	 */
	private String fPreferenceKey= null;
	/**
	 * The message displayed to the user, with the toggle button
	 */
	private String fToggleMessage= null;
	private Button fToggleButton= null;
	/**
	 * The preference store which will be affected by the toggle button
	 */
	IPreferenceStore fStore= null;

	public ErrorDialogWithToggle(Shell parentShell, String dialogTitle, String message, IStatus status, String preferenceKey, String toggleMessage, IPreferenceStore store) {
		super(parentShell, dialogTitle, message, status, IStatus.WARNING | IStatus.ERROR | IStatus.INFO);
		fStore= store;
		fPreferenceKey= preferenceKey;
		fToggleMessage= toggleMessage;
	}

	protected Control createDialogArea(Composite parent) {
		Composite dialogComposite= (Composite) super.createDialogArea(parent);
		dialogComposite.setFont(parent.getFont());
		setToggleButton(createCheckButton(dialogComposite, fToggleMessage));
		getToggleButton().setSelection(!fStore.getBoolean(fPreferenceKey));
		applyDialogFont(dialogComposite);
		return dialogComposite;
	}
	
	/**
	 * Creates a button with the given label and sets the default 
	 * configuration data.
	 */
	private Button createCheckButton(Composite parent, String label) {
		Button button= new Button(parent, SWT.CHECK | SWT.LEFT);
		button.setText(label);		

		GridData data = new GridData(SWT.NONE);
		data.horizontalSpan= 2;
		data.horizontalAlignment= GridData.CENTER;
		button.setLayoutData(data);
		button.setFont(parent.getFont());
		
		return button;
	}

	protected void buttonPressed(int id) {
		if (id == IDialogConstants.OK_ID) {  // was the OK button pressed?
			storePreference();
		}
		super.buttonPressed(id);
	}
	
	private void storePreference() {
		fStore.setValue(fPreferenceKey, !getToggleButton().getSelection());
	}

	protected Button getToggleButton() {
		return fToggleButton;
	}

	protected void setToggleButton(Button button) {
		fToggleButton = button;
	}
	
	/**
	 * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite)
	 */
	protected void createButtonsForButtonBar(Composite parent) {
		super.createButtonsForButtonBar(parent);
		getButton(IDialogConstants.OK_ID).setFocus();
	}
}