core/org.eclipse.stem.ui.grapheditor/src/org/eclipse/stem/ui/grapheditor/ComboListenerType.java

package org.eclipse.stem.ui.grapheditor;

import java.util.List;

import org.eclipse.emf.common.util.EList;
import org.eclipse.stem.definitions.labels.AreaLabel;
import org.eclipse.stem.definitions.labels.PopulationLabel;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Label;
import org.eclipse.zest.core.widgets.Graph;
import org.eclipse.zest.core.widgets.GraphItem;
import org.eclipse.zest.core.widgets.GraphNode;

public class ComboListenerType implements SelectionListener
{ 
	
	
	NodeData nodeData;
	//connectedCombo = Value of Label
	Combo connectedCombo;
	Label connectedLabel;
	Graph zestGraph;
	
	ComboListenerType(Graph zestGraph, Combo connectedCombo, Label connectedLabel)
	{
		
		this.zestGraph = zestGraph;
		this.connectedCombo = connectedCombo;
		this.connectedLabel = connectedLabel;
	}
	
	public void widgetDefaultSelected(final SelectionEvent e) {}
	
	public void widgetSelected(final SelectionEvent e) {
		
		connectedCombo.removeAll();
		Combo typeCombo = (Combo) e.widget;

		
		List<GraphItem> selectedItems = zestGraph.getSelection();
		if (selectedItems.size() == 1)
		{
			if (selectedItems.get(0) instanceof GraphNode)
			{
				GraphNode selectedNode = (GraphNode) selectedItems.get(0);
				NodeData nodeData = (NodeData) selectedNode.getData();
				this.nodeData = nodeData;
				
			}			
		}
		
		if  (this.nodeData == null)
			return;
		
		int selected = typeCombo.getSelectionIndex();
		
		
		if (selected >= 0)
		{						
			
			EList<org.eclipse.stem.core.graph.NodeLabel> nodeLabels = nodeData.getNodeLabels();
			org.eclipse.stem.core.graph.NodeLabel nodeLabel = nodeLabels.get(selected);
			List<Integer> labelTypes = nodeData.getNodeLabelTypes();
			
			switch(labelTypes.get(selected))
			{
			case GraphDefs.AREA_LABEL: 
				AreaLabel areaLabel = (AreaLabel) nodeLabel;
				connectedCombo.add(String.valueOf(areaLabel.getCurrentAreaValue().getArea()));
				connectedLabel.setText("Value (Area km^2): ");
				connectedCombo.select(0);
				break;
			
			
			case GraphDefs.POPULATION_LABEL: 
				PopulationLabel populationLabel = (PopulationLabel) nodeLabel;
				connectedCombo.add(populationLabel.getName());
				connectedCombo.add(String.valueOf(populationLabel.getCurrentPopulationValue().getCount()));
				connectedCombo.add(String.valueOf(populationLabel.getPopulatedArea()));
				connectedLabel.setText("Value (Population name): ");
				connectedCombo.select(0);
				break; 
				
			}
			
			
		}
			
	}
}