com.iw.plugins.spindle.ui.preferences.SpecFoldingPreferencePage.java Source code

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Here is the source code for com.iw.plugins.spindle.ui.preferences.SpecFoldingPreferencePage.java

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Spindle, an Eclipse Plugin for Tapestry.
 *
 * The Initial Developer of the Original Code is
 * Geoffrey Longman.
 * Portions created by the Initial Developer are Copyright (C) 2004
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * 
 *  glongman@gmail.com
 *
 * ***** END LICENSE BLOCK ***** */
package com.iw.plugins.spindle.ui.preferences;

import org.eclipse.jface.preference.BooleanFieldEditor;
import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

import com.iw.plugins.spindle.Images;
import com.iw.plugins.spindle.PreferenceConstants;
import com.iw.plugins.spindle.UIPlugin;

/**
 * @author GWL
 */
public class SpecFoldingPreferencePage extends PreferencePage
        implements IWorkbenchPreferencePage, IPropertyChangeListener {
    private static final String FOLDING_ENABLED = PreferenceConstants.EDITOR_FOLDING_ENABLED;

    private BooleanFieldEditor fFoldOnEditorOpen;

    /**
     * Constructor for SpindleRefactorPreferencePage.
     * 
     * @param style
     */
    public SpecFoldingPreferencePage() {
        super(UIPlugin.getString("preference-folding-title"), Images.getImageDescriptor("applicationDialog.gif"));

    }

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

    protected Control createContents(Composite parent) {
        initializeDialogUnits(parent);
        Font font = parent.getFont();
        GridData gd;

        Composite top = new Composite(parent, SWT.LEFT);
        top.setFont(font);
        int numColumns = 1;
        GridLayout layout = new GridLayout();
        layout.marginHeight = 0;
        layout.marginWidth = 0;
        top.setLayout(layout);

        // Sets the layout data for the top composite's
        // place in its parent's layout.
        top.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        fFoldOnEditorOpen = new BooleanFieldEditor(FOLDING_ENABLED,
                UIPlugin.getString("preference-editor-folding-enabled"), BooleanFieldEditor.DEFAULT, top);

        fFoldOnEditorOpen.setPreferencePage(this);
        fFoldOnEditorOpen.setPreferenceStore(UIPlugin.getDefault().getPreferenceStore());
        fFoldOnEditorOpen.load();
        fFoldOnEditorOpen.setPropertyChangeListener(this);

        return top;
    }

    protected void performDefaults() {
        fFoldOnEditorOpen.loadDefault();
        super.performDefaults();
    }

    public boolean performOk() {
        fFoldOnEditorOpen.store();
        return super.performOk();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
     */
    public void propertyChange(PropertyChangeEvent event) {
        if (event.getProperty().equals(FieldEditor.IS_VALID)) {
            boolean newValue = ((Boolean) event.getNewValue()).booleanValue();
            // If the new value is true then we must check all field editors.
            // If it is false, then the page is invalid in any case.
            if (newValue) {
                setValid(fFoldOnEditorOpen.isValid());
            } else {
                setValid(newValue);
            }
        }
    }

}