org.cs3.pdt.graphicalviews.preferences.PreferencePageBase.java Source code

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Here is the source code for org.cs3.pdt.graphicalviews.preferences.PreferencePageBase.java

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/*****************************************************************************
 * This file is part of the Prolog Development Tool (PDT)
 * 
 * WWW: http://sewiki.iai.uni-bonn.de/research/pdt/start
 * Mail: pdt@lists.iai.uni-bonn.de
 * Copyright (C): 2004-2012, CS Dept. III, University of Bonn
 * 
 * All rights reserved. This program is  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
 * 
 ****************************************************************************/

package org.cs3.pdt.graphicalviews.preferences;

import java.util.LinkedList;
import java.util.List;

import org.cs3.pdt.graphicalviews.main.PluginActivator;
import org.cs3.pdt.graphicalviews.main.PreferencesUpdateListener;
import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.jface.preference.FieldEditorPreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

public abstract class PreferencePageBase extends FieldEditorPreferencePage
        implements IWorkbenchPreferencePage, PreferencesUpdateListener {

    private List<FieldEditor> editors = new LinkedList<FieldEditor>();
    private GridData parentData;

    protected static GridLayout groupLayout;
    protected static GridData cellData;
    protected static GridData defaultAligmentData;

    public PreferencePageBase() {
        super(GRID);
        setPreferenceStore(PluginActivator.getDefault().getPreferenceStore());
        PluginActivator.getDefault().addPreferencesUpdateListener(this);

        parentData = new GridData(GridData.FILL_HORIZONTAL);
        parentData.horizontalSpan = 2;
        parentData.verticalIndent = 5;

        defaultAligmentData = new GridData();
        defaultAligmentData.horizontalSpan = 2;
        defaultAligmentData.horizontalIndent = 9;
        defaultAligmentData.verticalIndent = 5;

        groupLayout = new GridLayout();
        groupLayout.marginWidth = 10;
        groupLayout.marginHeight = 10;
        groupLayout.numColumns = 2;

        cellData = new GridData();
        cellData.widthHint = 200;
        cellData.heightHint = 32;
    }

    @Override
    public void init(IWorkbench workbench) {
    }

    @Override
    public boolean performOk() {
        boolean res = super.performOk();
        if (res) {
            PluginActivator.getDefault().preferencesUpdated();
        }
        return res;
    }

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

    @Override
    public void preferencesUpdated() {
        for (FieldEditor e : editors) {
            if (e != null) {
                e.load();
            }
        }
    }

    @Override
    public void dispose() {
        PluginActivator.getDefault().removePreferencesUpdateListener(this);
        super.dispose();
    }

    protected Group createGroup(String title, Layout groupLayout) {

        Group predicateBgColor = new Group(getFieldEditorParent(), SWT.NONE);
        predicateBgColor.setText(title);
        predicateBgColor.setLayout(groupLayout);
        predicateBgColor.setLayoutData(parentData);
        return predicateBgColor;
    }

    public Composite wrap(Composite parent) {
        return wrap(parent, null);
    }

    public Composite wrap(Composite parent, Object layoutData) {

        Composite w = new Composite(parent, SWT.NONE);
        if (layoutData == null) {
            layoutData = defaultAligmentData;
        }
        w.setLayoutData(layoutData);
        return w;
    }
}