org.eclipse.oomph.setup.internal.installer.AbstractPreferenceDialog.java Source code

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Here is the source code for org.eclipse.oomph.setup.internal.installer.AbstractPreferenceDialog.java

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/*
 * Copyright (c) 2014 Eike Stepper (Berlin, Germany) 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:
 *    Eike Stepper - initial API and implementation
 */
package org.eclipse.oomph.setup.internal.installer;

import org.eclipse.oomph.setup.ui.AbstractSetupDialog;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.IMessageProvider;
import org.eclipse.jface.preference.IPreferencePageContainer;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;

/**
 * @author Eike Stepper
 */
public abstract class AbstractPreferenceDialog extends AbstractSetupDialog implements IPreferencePageContainer {
    private PreferencePage preferencePage;

    private boolean showingError;

    public AbstractPreferenceDialog(Shell parentShell, String title) {
        super(parentShell, title, 600, 600, SetupInstallerPlugin.INSTANCE, false);
    }

    public IPreferenceStore getPreferenceStore() {
        return SetupInstallerPlugin.INSTANCE.getPreferenceStore();
    }

    public void updateTitle() {
        // Do nothing
    }

    public void updateMessage() {
        String message = null;
        String errorMessage = null;
        if (preferencePage != null) {
            message = preferencePage.getMessage();
            errorMessage = preferencePage.getErrorMessage();
        }

        int messageType = IMessageProvider.NONE;
        if (message != null) {
            messageType = ((IMessageProvider) preferencePage).getMessageType();
        }

        if (errorMessage == null) {
            if (showingError) {
                // We were previously showing an error
                showingError = false;
            }
        } else {
            message = errorMessage;
            messageType = IMessageProvider.ERROR;
            if (!showingError) {
                // We were not previously showing an error
                showingError = true;
            }
        }

        if (message == null) {
            message = getDefaultMessage();
        }

        setMessage(message, messageType);
    }

    public void updateButtons() {
        Button button = getButton(IDialogConstants.OK_ID);
        if (button != null) {
            button.setEnabled(preferencePage.isValid());
        }
    }

    @Override
    protected void createUI(Composite parent) {
        preferencePage = createPreferencePage();
        preferencePage.setContainer(this);
        preferencePage.createControl(parent);
        preferencePage.getControl().setLayoutData(new GridData(GridData.FILL_BOTH));
    }

    protected abstract PreferencePage createPreferencePage();

    @Override
    protected void okPressed() {
        preferencePage.performOk();
        super.okPressed();
    }
}