com.chookapp.org.bracketeer.preferences.ChangingFieldsPrefPage.java Source code

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Here is the source code for com.chookapp.org.bracketeer.preferences.ChangingFieldsPrefPage.java

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/*******************************************************************************
 * Copyright (c) Gil Barash - chookapp@yahoo.com
 * 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:
 *    Gil Barash - initial API and implementation
 *******************************************************************************/
package com.chookapp.org.bracketeer.preferences;

import java.io.IOException;
import java.util.ArrayList;

import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.jface.preference.IPersistentPreferenceStore;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Spinner;
import org.eclipse.wb.swt.FieldLayoutPreferencePage;

import com.chookapp.org.bracketeer.Activator;

public abstract class ChangingFieldsPrefPage extends FieldLayoutPreferencePage {
    protected ArrayList<String> _prefNames;
    private IPreferenceStore _tempPrefs;
    private IPreferenceStore _realPrefs;

    protected ChangingFieldsPrefPage() {
        _prefNames = new ArrayList<String>();
        _tempPrefs = new NonPersistantPreferencesStore();
        // If we want to re-enable design mode, we should comment out this line
        _realPrefs = Activator.getDefault().getPreferenceStore();
        setPreferenceStore(_tempPrefs);
    }

    @Override
    protected void addField(FieldEditor editor) {
        super.addField(editor);
        _prefNames.add(editor.getPreferenceName());
    }

    @Override
    protected void initialize() {
        for (String attr : _prefNames) {
            _tempPrefs.setDefault(attr, _realPrefs.getDefaultString(attr));
            _tempPrefs.setValue(attr, _realPrefs.getString(attr));
        }

        super.initialize();
    }

    @Override
    public boolean performOk() {
        super.performOk();

        for (String attr : _prefNames) {
            _realPrefs.setValue(attr, _tempPrefs.getString(attr));
        }

        if (_realPrefs.needsSaving() && _realPrefs instanceof IPersistentPreferenceStore) {
            try {
                ((IPersistentPreferenceStore) _realPrefs).save();
            } catch (IOException e) {
                Activator.log(e);
            }
        }

        return true;
    }

    @Override
    protected void performDefaults() {
        super.performDefaults();
        for (String attr : _prefNames) {
            _tempPrefs.setValue(attr, _realPrefs.getDefaultString(attr));
        }
        updateAll();
    }

    protected void setEnable(Composite comp, boolean enable) {
        Control[] controls = comp.getChildren();
        if (controls == null)
            return;

        for (Control c : controls) {
            if (c instanceof Composite && !(c instanceof Spinner))
                setEnable((Composite) c, enable);
            else
                c.setEnabled(enable);
        }
    }

    protected abstract void updateAll();
}