net.geoprism.shapefile.ui.ShapeFileBeanPage.java Source code

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Here is the source code for net.geoprism.shapefile.ui.ShapeFileBeanPage.java

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/**
 * Copyright (c) 2015 TerraFrame, Inc. All rights reserved.
 *
 * This file is part of Runway SDK(tm).
 *
 * Runway SDK(tm) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * Runway SDK(tm) is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Runway SDK(tm).  If not, see <http://www.gnu.org/licenses/>.
 */
package net.geoprism.shapefile.ui;

import net.geoprism.shapefile.LabeledValueBean;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.beans.BeanProperties;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.databinding.viewers.ViewersObservables;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.widgets.Display;

import com.runwaysdk.generation.loader.Reloadable;

public abstract class ShapeFileBeanPage extends WizardPage implements Reloadable {
    protected final ShapeFileBean data;

    protected DataBindingContext bindingContext;

    public ShapeFileBeanPage(String pageName, ShapeFileBean data) {
        super(pageName);

        this.data = data;
        this.bindingContext = new DataBindingContext(SWTObservables.getRealm(Display.getDefault()));
    }

    protected void bind(ComboViewer viewer, String attribute) {
        class TargetToModel extends UpdateValueStrategy implements Reloadable {
            @Override
            protected IStatus doSet(IObservableValue observableValue, Object value) {
                if (value instanceof LabeledValueBean) {
                    return super.doSet(observableValue, ((LabeledValueBean) value).getValue());
                } else {
                    return super.doSet(observableValue, value);
                }
            }
        }

        class ModelToTarget extends UpdateValueStrategy implements Reloadable {
            @Override
            protected IStatus doSet(IObservableValue observableValue, Object value) {
                return super.doSet(observableValue, new LabeledValueBean((String) value));
            }
        }

        IObservableValue uiElement = ViewersObservables.observeSingleSelection(viewer);
        IObservableValue modelElement = BeanProperties.value(ShapeFileBean.class, attribute).observe(data);

        UpdateValueStrategy targetToModel = new TargetToModel();

        UpdateValueStrategy modelToTarget = new ModelToTarget();

        bindingContext.bindValue(uiElement, modelElement, targetToModel, modelToTarget);
    }
}