io.usethesource.impulse.preferences.AlternativePreferencesPage.java Source code

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Here is the source code for io.usethesource.impulse.preferences.AlternativePreferencesPage.java

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/*******************************************************************************
* Copyright (c) 2007 IBM Corporation.
* 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:
*    Robert Fuhrer (rfuhrer@watson.ibm.com) - initial API and implementation
    
*******************************************************************************/

package io.usethesource.impulse.preferences;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

/**
 * A multi-tab preferences page for Imp-supported languages.
 * The various tabs nominally represent the same sets of preferences
 * as set on different levels (default, workspace configuration,
 * workspace instance, and project).
 * 
 * @author suttons@us.ibm.com
 */
public abstract class AlternativePreferencesPage extends PreferencePage implements IWorkbenchPreferencePage {

    public AlternativePreferencesPage() {
        this.noDefaultAndApplyButton();
    }

    protected Control createContents(Composite parent) {
        String message = getAlternativeMessage();
        Label label = new Label(parent, SWT.WRAP);
        label.setText(message);

        // Set the font on the page
        Dialog.applyDialogFont(parent);

        return label;
    }

    protected abstract String getAlternativeMessage();

    /*
     * The following operations provide a page-level response to the pressing of
     * buttons on the page.  Note, though, that a preference page may not have all of
     * these buttons--buttons not present on the page may instead be present on individual
     * tabs on the page.
     */

    /**
     * Respond to pressing of Cancel button by cancelling in-progress
     * preference updates on each level.
     * 
     * @see org.eclipse.jface.preference.IPreferencePage#performCancel()
     */
    public boolean performCancel() {
        return true;
    }

    /**
     * Respond to pressing of the Save button by saving the prevailing preferences.
     * 
     * Note:  In a system of multiple preference levels with preference-value
     * inheritance, this may only save values on the levels on which they
     * are stored, i.e., not on levels where they apply through inheritance only.
     * 
     * @see org.eclipse.jface.preference.PreferencePage#performDefaults()
     */
    public boolean performOk() {
        return true;
    }

    /**
     * For IWorkbenchPreferencePage
     * 
     * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
     */
    public void init(IWorkbench workbench) {
    }

}