BalloonDialog.java

/* *****************************************************************************
 * Copyright (c) 2009 Ola Spjuth.
 * 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:
 *     Ola Spjuth - initial API and implementation
 ******************************************************************************/
package net.bioclipse.balloon.ui;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

/**
 * A dialog to select number of conformers for generation with balloon
 * @author ola
 *
 */
public class BalloonDialog extends TitleAreaDialog{

    private static final String DEFAULT_NUM_CONFORMERS = "15";

    int numConformers = Integer.parseInt( DEFAULT_NUM_CONFORMERS );
    
    private Text txtNumConf;

    public BalloonDialog(Shell parentShell) {
        super( parentShell );
    }

    @Override
    protected Control createDialogArea( Composite parent ) {
        
        setTitle( "Generate conformers using Balloon" );
        setMessage( "Generate conformers using Balloon" );
//        setTitleImage(Activator.getImageDescriptor( "icons/balloon_wiz.jpg" ).createImage() );

        Composite composite = new Composite(parent, SWT.NONE);
        GridLayout layout = new GridLayout(2, false);
        layout.marginHeight = 0;
        layout.marginWidth = 0;
        layout.verticalSpacing = 0;
        layout.horizontalSpacing = 0;
        composite.setLayout(layout);
        composite.setLayoutData(new GridData(GridData.FILL_BOTH));
        composite.setFont(parent.getFont());
        // Build the separator line
        Label titleBarSeparator = new Label(composite, SWT.HORIZONTAL
                                            | SWT.SEPARATOR);
        GridData gdl=new GridData(SWT.FILL, SWT.TOP, true, false);
        gdl.horizontalSpan=2;
        titleBarSeparator.setLayoutData(gdl);

        Label lblNumConf=new Label(composite,SWT.NONE);
        lblNumConf.setText( "Number of conformations (target):  " );
        lblNumConf.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, true, false));

        txtNumConf=new Text(composite, SWT.BORDER);
        GridData gd=new GridData(SWT.LEFT, SWT.NONE, true, false);
        gd.widthHint=100;
        txtNumConf.setLayoutData(gd);
        txtNumConf.setText( DEFAULT_NUM_CONFORMERS );

        txtNumConf.addKeyListener( new KeyListener(){

            public void keyPressed( KeyEvent e ) {
            }

            public void keyReleased( KeyEvent e ) {
                updateStatus();
            }} );

        return composite;
    }

    protected void updateStatus() {

        setErrorMessage( null );
        getButton(IDialogConstants.OK_ID).setEnabled( true );

        String numstr=txtNumConf.getText();
        if (numstr==null || numstr.length()<=0){
            setErrorMessage( "Number of conformers cannot be empty." );
            getButton(IDialogConstants.OK_ID).setEnabled( false );
        }
        else{
            try{
                numConformers=Integer.parseInt( numstr );
                if (numConformers<=0){
                    setErrorMessage( "Number of conformers must be a positive integer." );
                    getButton(IDialogConstants.OK_ID).setEnabled( false );
                }
            }catch (NumberFormatException e){
                setErrorMessage( "Cannot parse number of conformers to integer" );
                getButton(IDialogConstants.OK_ID).setEnabled( false );
            }
        }        

        return;

    }

    public int getNumConformers() {
        return numConformers;
    }

}