org.bonitasoft.studio.configuration.ui.wizard.page.SelectProcessWizardPage.java Source code

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Here is the source code for org.bonitasoft.studio.configuration.ui.wizard.page.SelectProcessWizardPage.java

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/**
 * Copyright (C) 2012 BonitaSoft S.A.
 * BonitaSoft, 31 rue Gustave Eiffel - 38000 Grenoble
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2.0 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.bonitasoft.studio.configuration.ui.wizard.page;

import org.bonitasoft.studio.configuration.i18n.Messages;
import org.bonitasoft.studio.model.process.AbstractProcess;
import org.bonitasoft.studio.model.process.MainProcess;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.beans.PojoObservables;
import org.eclipse.core.databinding.validation.IValidator;
import org.eclipse.core.databinding.validation.ValidationStatus;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.databinding.viewers.ViewersObservables;
import org.eclipse.jface.databinding.wizard.WizardPageSupport;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.dialogs.FilteredTree;
import org.eclipse.ui.dialogs.PatternFilter;

/**
 * @author Romain Bioteau
 *
 */
public class SelectProcessWizardPage extends WizardPage {

    private MainProcess diagram;
    private Object selection;
    private DataBindingContext databindingContext;

    public SelectProcessWizardPage(MainProcess diagram) {
        super(SelectProcessWizardPage.class.getName());
        setTitle(Messages.selectProcessToConfigureTitle);
        setDescription(Messages.selectProcessToConfigureDesc);
        this.diagram = diagram;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
     */
    @Override
    public void createControl(Composite parent) {
        Composite mainComposite = new Composite(parent, SWT.NONE);
        mainComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create());
        mainComposite.setLayout(GridLayoutFactory.fillDefaults().numColumns(1).create());

        databindingContext = new DataBindingContext();

        final FilteredTree tree = new FilteredTree(mainComposite, SWT.FULL_SELECTION | SWT.BORDER | SWT.SINGLE,
                new PatternFilter(), false);
        tree.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create());
        TreeViewer viewer = tree.getViewer();
        viewer.setContentProvider(new ProcessContentProvider());
        viewer.setLabelProvider(new ProcessTreeLabelProvider());

        UpdateValueStrategy startegy = new UpdateValueStrategy();
        startegy.setBeforeSetValidator(new IValidator() {

            @Override
            public IStatus validate(Object value) {
                if (value instanceof AbstractProcess && !(value instanceof MainProcess)) {
                    return Status.OK_STATUS;
                }
                return ValidationStatus.error(Messages.mustSelectProcessError);
            }
        });

        if (diagram == null) {
            viewer.setInput(new Object[] { ProcessContentProvider.OTHER_PROCESSES });
        } else {
            viewer.setInput(new Object[] { diagram, ProcessContentProvider.OTHER_PROCESSES });
        }

        if (diagram != null) {
            if (((ITreeContentProvider) viewer.getContentProvider()).hasChildren(diagram)) {
                viewer.expandToLevel(diagram, 1);
            }
        } else {
            if (((ITreeContentProvider) viewer.getContentProvider())
                    .hasChildren(ProcessContentProvider.OTHER_PROCESSES)) {
                viewer.expandToLevel(ProcessContentProvider.OTHER_PROCESSES, 1);
            }
        }

        WizardPageSupport.create(this, databindingContext);
        databindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer),
                PojoObservables.observeValue(this, "selection"), startegy, null);

        setControl(mainComposite);
    }

    public Object getSelection() {
        return selection;
    }

    public void setSelection(Object selection) {
        this.selection = selection;
    }

    @Override
    public void dispose() {
        super.dispose();
        if (databindingContext != null) {
            databindingContext.dispose();
        }
    }
}