/*******************************************************************************
 * 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.ui.internal.ide.dialogs;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Shell;

/**
 * A dialog to show a multi-step wizard to the end user. 
 * <p>
 * In typical usage, the client instantiates this class with 
 * a multi-step wizard. The dialog serves as the wizard container
 * and orchestrates the presentation of its pages.
 * <p>
 * The standard layout is roughly as follows: 
 * it has an area at the top containing both the
 * wizard's title, description, and image; the actual wizard page
 * appears in the middle; below that is a progress indicator
 * (which is made visible if needed); and at the bottom
 * of the page is message line and a button bar containing 
 * Help, Next, Back, Finish, and Cancel buttons (or some subset).
 * </p>
 * <p>
 * This class is not intended to be subclassed by clients.
 * </p>
 */
public class MultiStepWizardDialog extends WizardDialog {
    private MultiStepWizard multiStepWizard;

    /**
     * Creates a new wizard dialog for the given wizard. 
     *
     * @param parentShell the parent shell
     * @param newWizard the multi-step wizard this dialog is working on
     */
    public MultiStepWizardDialog(Shell parentShell, MultiStepWizard newWizard) {
        super(parentShell, newWizard);
        multiStepWizard = newWizard;
        multiStepWizard.setWizardDialog(this);
    }

    /**
     * Forces the wizard dialog to close
     */
    /* package */void forceClose() {
        super.finishPressed();
    }

    /* (non-Javadoc)
     * Method declared on WizardDialog.
     */
    protected void backPressed() {
        if (multiStepWizard.isConfigureStepMode())
            multiStepWizard.getStepContainer().backPressed();
        else
            super.backPressed();
    }

    /* (non-Javadoc)
     * Method declared on WizardDialog.
     */
    protected void finishPressed() {
        if (multiStepWizard.isConfigureStepMode()) {
            boolean success = multiStepWizard.getStepContainer()
                    .performFinish();
            if (success)
                multiStepWizard.getStepContainer().processCurrentStep();
        } else {
            super.finishPressed();
        }
    }

    /**
     * Returns the multi-step wizard for this dialog
     */
    /* package */MultiStepWizard getMultiStepWizard() {
        return multiStepWizard;
    }

    /* (non-Javadoc)
     * Method declared on WizardDialog.
     */
    protected void helpPressed() {
        if (multiStepWizard.isConfigureStepMode())
            multiStepWizard.getStepContainer().helpPressed();
        else
            super.helpPressed();
    }

    /* (non-Javadoc)
     * Method declared on WizardDialog.
     */
    protected void nextPressed() {
        if (multiStepWizard.isConfigureStepMode())
            multiStepWizard.getStepContainer().nextPressed();
        else
            super.nextPressed();
    }

    /**
     * Sets the label for the finish button
     */
    /* package */void setFinishLabel(String label) {
        Button button = getButton(IDialogConstants.FINISH_ID);
        if (button == null)
            return;

        if (label == null) {
            if (!button.getText().equals(IDialogConstants.FINISH_LABEL)) {
                button.setText(IDialogConstants.FINISH_LABEL);
                button.getParent().layout(true);
            }
        } else {
            button.setText(label);
            button.getParent().layout(true);
        }
    }

    /**
     * Updates everything in the dialog
     */
    /* package */void updateAll() {
        super.update();
    }

    /**
     * Updates the layout of the dialog
     */
    /* package */void updateLayout() {
        super.updateSize(getCurrentPage());
    }
}