com.codesourcery.internal.installer.ui.InstallWizardDialog.java Source code

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Here is the source code for com.codesourcery.internal.installer.ui.InstallWizardDialog.java

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/*******************************************************************************
 *  Copyright (c) 2014 Mentor Graphics 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:
 *     Mentor Graphics - initial API and implementation
 *******************************************************************************/
package com.codesourcery.internal.installer.ui;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.wizard.IWizardPage;
import org.eclipse.jface.wizard.ProgressMonitorPart;
import org.eclipse.swt.widgets.Button;

import com.codesourcery.installer.IInstallWizardPage;
import com.codesourcery.installer.Installer;
import com.codesourcery.internal.installer.IInstallerImages;
import com.codesourcery.internal.installer.InstallMessages;
import com.codesourcery.internal.installer.ui.pages.ProgressPage;

/**
 * Install wizard dialog
 */
public class InstallWizardDialog extends WizardDialog {
    /** Install wizard */
    private InstallWizard installWizard;

    /**
     * Constructor
     * 
     * @param newWizard Install wizard
     */
    public InstallWizardDialog(InstallWizard newWizard) {
        super(null, newWizard);
        this.installWizard = newWizard;
    }

    /**
     * Returns the install wizard.
     * 
     * @return Install wizard
     */
    private InstallWizard getInstallWizard() {
        return installWizard;
    }

    @Override
    public void run(boolean fork, boolean cancelable, IRunnableWithProgress runnable)
            throws InvocationTargetException, InterruptedException {
        // Set focust to cancel button
        this.getButton(IDialogConstants.CANCEL_ID).setFocus();

        super.run(fork, cancelable, runnable);
    }

    @Override
    public void create() {
        super.create();

        // Set window icon
        getShell().setImage(Installer.getDefault().getImageRegistry().get(IInstallerImages.TITLE_ICON));
    }

    /**
     * Validates the current install page.
     * 
     * @return <code>true</code> if the page is valid,
     * <code>false</code> otherwise
     */
    private boolean validateCurrentPage() {
        boolean valid = true;

        IWizardPage current = getCurrentPage();
        if (current instanceof IInstallWizardPage) {
            IInstallWizardPage installPage = (IInstallWizardPage) current;
            if (!installPage.validate()) {
                valid = false;
            }
        }

        return valid;
    }

    @Override
    protected void finishPressed() {
        // Validate current page
        if (!validateCurrentPage())
            return;

        saveCurrentPage();

        super.finishPressed();
    }

    @Override
    public void nextPressed() {
        // Validate the install page
        if (!validateCurrentPage()) {
            return;
        }

        saveCurrentPage();

        super.nextPressed();
    }

    /**
     * Saves the current page.
     */
    private void saveCurrentPage() {
        if (getCurrentPage() instanceof IInstallWizardPage) {
            ((IInstallWizardPage) getCurrentPage()).saveInstallData(getInstallWizard().getInstallData());
        }
    }

    @Override
    public void showPage(IWizardPage page) {
        // Set new page
        super.showPage(page);

        // Set page active
        if (page instanceof IInstallWizardPage) {
            try {
                ((IInstallWizardPage) getCurrentPage()).setActive(getInstallWizard().getInstallData());
            } catch (Exception e) {
                Installer.log(e);
            }
        }

        IWizardPage[] pages = getInstallWizard().getPages();
        // If final page, update buttons so that only
        // OK is enabled.
        if ((pages.length > 0) && (page == pages[pages.length - 1])) {
            Button button = getButton(IDialogConstants.BACK_ID);
            if (button != null) {
                button.setEnabled(false);
            }
            button = getButton(IDialogConstants.NEXT_ID);
            if (button != null) {
                button.setEnabled(false);
            }
            button = getButton(IDialogConstants.CANCEL_ID);
            if (button != null) {
                button.setEnabled(false);
            }
            getButton(IDialogConstants.FINISH_ID).setText(IDialogConstants.OK_LABEL);
        }
    }

    /**
     * Returns the page progress monitor part to
     * use for long operations.
     * 
     * @return Progress monitor part
     */
    protected ProgressMonitorPart getPageProgressMonitor() {
        ProgressPage installPage = getInstallWizard().getProgressPage();
        return installPage.getProgressMonitorPart();
    }

    @Override
    public void updateButtons() {
        super.updateButtons();

        // Rename 'Finish' button to 'Install or 'Uninstall'
        getButton(IDialogConstants.FINISH_ID)
                .setText(getInstallWizard().isInstall() ? InstallMessages.Install : InstallMessages.Uninstall);

        // Override the wizard dialog default behavior to set the finish button
        // as default.  Always set the next button as default.
        IWizardPage currentPage = getCurrentPage();
        if ((currentPage != null) && currentPage.canFlipToNextPage()) {
            getShell().setDefaultButton(this.getButton(IDialogConstants.NEXT_ID));
        }
    }

    public void setButtonsEnabled(boolean enable) {
        // Restore enabled state
        if (enable) {
            Button button = getButton(IDialogConstants.CANCEL_ID);
            if (button != null) {
                button.setEnabled(true);
            }
            updateButtons();
        }
        // Disable
        else {
            Button button = getButton(IDialogConstants.BACK_ID);
            if (button != null) {
                button.setEnabled(false);
            }
            button = getButton(IDialogConstants.NEXT_ID);
            if (button != null) {
                button.setEnabled(false);
            }
            button = getButton(IDialogConstants.CANCEL_ID);
            if (button != null) {
                button.setEnabled(false);
            }
            button = getButton(IDialogConstants.FINISH_ID);
            if (button != null) {
                button.setEnabled(false);
            }
        }
    }
}