/*******************************************************************************
 * Copyright (c) 2010 Oak Ridge National Laboratory.
 * 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
 ******************************************************************************/
package org.csstudio.swt.xygraph.toolbar;

import org.csstudio.swt.xygraph.figures.Annotation;
import org.csstudio.swt.xygraph.figures.XYGraph;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

/**The dialog for removing annotation.
 * @author Xihui Chen
 * @author Kay Kasemir layout tweaks
 */
public class RemoveAnnotationDialog extends Dialog {
	private XYGraph xyGraph;
	private Combo annotationsCombo;
	private Annotation removedAnnotation;
	
	protected RemoveAnnotationDialog(Shell parentShell, XYGraph xyGraph) {
		super(parentShell);	
		this.xyGraph = xyGraph;
        // Allow resize
        setShellStyle(getShellStyle() | SWT.RESIZE);
	}
	
	@Override
	protected void configureShell(Shell newShell) {
		super.configureShell(newShell);
		newShell.setText("Remove Annotation");
	}
	
	@Override
	protected Control createDialogArea(Composite parent) {
		final Composite parent_composite = (Composite) super.createDialogArea(parent);
        final Composite composite = new Composite(parent_composite, SWT.NONE);
        composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
		composite.setLayout(new GridLayout(1, false));
        final Label removeLabel = new Label(composite, SWT.None);
        removeLabel.setLayoutData(new GridData());
        if(xyGraph.getPlotArea().getAnnotationList().size() > 0){        	
	        removeLabel.setText("Select the annotation to be removed: ");        
	        annotationsCombo = new Combo(composite, SWT.DROP_DOWN);
	        annotationsCombo.setLayoutData(new GridData(SWT.FILL, 0, true, false));
	        for(Annotation annotation : xyGraph.getPlotArea().getAnnotationList())
	        	annotationsCombo.add(annotation.getName());
	        annotationsCombo.select(0);
        }else{
        	removeLabel.setText("There is no annotation on the graph."); 
        }
        
		return parent_composite;
	}
	 
	@Override
	protected void okPressed() {
		if(annotationsCombo != null)
			removedAnnotation = xyGraph.getPlotArea().getAnnotationList().get(
				annotationsCombo.getSelectionIndex());
		super.okPressed();
	}
	 
	/**
	 * @return the annotation to be removed.
	 */
	public Annotation getAnnotation() {
		return removedAnnotation;
	}
}