org.springsource.ide.eclipse.gradle.ui.PreferencePageWithSections.java Source code

Introduction

Here is the source code for org.springsource.ide.eclipse.gradle.ui.PreferencePageWithSections.java

Source

/*******************************************************************************
 * Copyright (c) 2012 VMWare, Inc.
 * 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:
 * VMWare, Inc. - initial API and implementation
 *******************************************************************************/
package org.springsource.ide.eclipse.gradle.ui;

import java.util.List;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.IMessageProvider;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.SWT;
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 org.springsource.ide.eclipse.gradle.core.util.expression.LiveExpression;
import org.springsource.ide.eclipse.gradle.core.util.expression.ValueListener;
import org.springsource.ide.eclipse.gradle.core.validators.CompositeValidator;
import org.springsource.ide.eclipse.gradle.core.validators.ValidationResult;

/**
 * An abstract super class to more easily create preferences pages composed of modular sections.
 * Each section encapsulates its own widgetry and validation logic.
 * 
 * @author Kris De Volder
 */
public abstract class PreferencePageWithSections extends PreferencePage
        implements IWorkbenchPreferencePage, ValueListener<ValidationResult>, IPageWithSections {

    private List<PrefsPageSection> sections = null;

    public PreferencePageWithSections() {
    }

    public void init(IWorkbench workbench) {
    }

    /**
     * This method should be implemented to generate the contents of the page.
     */
    protected abstract List<PrefsPageSection> createSections();

    @Override
    protected Control createContents(Composite parent) {
        Composite page = new Composite(parent, SWT.NONE);
        GridLayout layout = new GridLayout(1, false);
        layout.marginHeight = 1;
        layout.marginWidth = 1;
        page.setLayout(layout);
        CompositeValidator validator = new CompositeValidator();
        for (PrefsPageSection section : getSections()) {
            section.createContents(page);
            validator.addChild(section.getValidator());
        }
        validator.addListener(this);
        return page;
    }

    @Override
    public boolean performOk() {
        for (PrefsPageSection section : getSections()) {
            boolean ok = section.performOK();
            if (!ok) {
                return false;
            }
        }
        //We reach here only when all sections performOK returned true 
        return true;
    }

    private synchronized List<PrefsPageSection> getSections() {
        if (sections == null) {
            sections = createSections();
        }
        return sections;
    }

    @Override
    protected void performDefaults() {
        super.performDefaults();
        for (PrefsPageSection section : getSections()) {
            section.performDefaults();
        }
    }

    public void gotValue(LiveExpression<ValidationResult> exp, ValidationResult status) {
        setErrorMessage(null);
        setMessage(null);
        if (status.isOk()) {
        } else if (status.status == IStatus.ERROR) {
            setErrorMessage(status.msg);
        } else if (status.status == IStatus.WARNING) {
            setMessage(status.msg, IMessageProvider.WARNING);
        } else if (status.status == IStatus.INFO) {
            setMessage(status.msg, IMessageProvider.INFORMATION);
        } else {
            setMessage(status.msg, IMessageProvider.NONE);
        }
    }

}