net.bioclipse.cdk.ui.wizards.SelectFileWizardPage.java Source code

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Here is the source code for net.bioclipse.cdk.ui.wizards.SelectFileWizardPage.java

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/*
 * Copyright (C) 2005 Bioclipse Project 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: Stefan Kuhn -
 * Implementation of the tanimoto ui elements
 */
package net.bioclipse.cdk.ui.wizards;

import java.io.IOException;

import net.bioclipse.chemoinformatics.contentlabelproviders.MoleculeFileContentProvider;
import net.bioclipse.chemoinformatics.util.ChemoinformaticUtils;
import net.bioclipse.core.util.LogUtils;

import org.apache.log4j.Logger;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.wizard.WizardPage;
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.ui.model.WorkbenchLabelProvider;

/**
 * A wizard page for selecting a single molecule file.
 */
public class SelectFileWizardPage extends WizardPage {

    private IStructuredSelection selectedFiles = null;
    private static final Logger logger = Logger.getLogger(SelectFileWizardPage.class);

    protected SelectFileWizardPage() {

        super("Tanimoto similarity calculation");
        setTitle("Select file to compare to");
        setDescription("Tanimoto similarity will be calculated against this file.");
    }

    public void createControl(Composite parent) {

        Composite container = new Composite(parent, SWT.NULL);
        GridLayout layout = new GridLayout();
        container.setLayout(layout);
        layout.numColumns = 2;
        layout.verticalSpacing = 9;
        final TreeViewer treeViewer = new TreeViewer(container);
        treeViewer.setContentProvider(new MoleculeFileContentProvider());
        treeViewer.setLabelProvider(WorkbenchLabelProvider.getDecoratingWorkbenchLabelProvider());
        treeViewer.setUseHashlookup(true);
        // Layout the tree viewer below the text field
        GridData layoutData = new GridData();
        layoutData.grabExcessHorizontalSpace = true;
        layoutData.grabExcessVerticalSpace = true;
        layoutData.horizontalAlignment = GridData.FILL;
        layoutData.verticalAlignment = GridData.FILL;
        layoutData.horizontalSpan = 3;
        treeViewer.getControl().setLayoutData(layoutData);
        treeViewer.setInput(ResourcesPlugin.getWorkspace().getRoot().findMember("."));
        treeViewer.expandToLevel(2);
        treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {

            public void selectionChanged(SelectionChangedEvent event) {

                SelectFileWizardPage.this.setPageComplete(false);
                ISelection sel = event.getSelection();
                if (sel instanceof IStructuredSelection) {
                    selectedFiles = (IStructuredSelection) sel;
                    try {
                        if (selectedFiles.size() == 1 && containsMolecule(selectedFiles))
                            SelectFileWizardPage.this.setPageComplete(true);
                    } catch (Exception e) {
                        LogUtils.handleException(e, logger);
                    }
                }
            }
        });
        treeViewer.setSelection(new StructuredSelection(ResourcesPlugin.getWorkspace().getRoot().findMember(".")));
        setPageComplete(false);
        setControl(container);
    }

    public IStructuredSelection getSelectedRes() {

        return this.selectedFiles;
    }

    private boolean containsMolecule(IStructuredSelection selectedFiles) throws CoreException, IOException {

        if (selectedFiles != null) {
            for (int i = 0; i < selectedFiles.toArray().length; i++) {
                if (selectedFiles.toArray()[i] instanceof IFile) {
                    if (ChemoinformaticUtils.isMolecule((IFile) selectedFiles.toArray()[i]))
                        return true;
                }
            }
        }
        return false;
    }
}