[news.eclipse.platform.swt] SWT table

[Elemental <ahsanfz@xxxxxxxxxxx>]

Hye,

I have been banging my head with SWT table. I want it to appear in a preference page. Following is the code which I modified to run as swt application. 

The problem is I can't get the table to appear whatever i do. Neither as a standlone application nor on preference page. Can someone point out what I am doing wrong.

Ahsan




import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import java.util.Vector;

import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.jface.preference.FieldEditorPreferencePage;
import org.eclipse.jface.preference.FileFieldEditor;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

import ed.inf.proofgeneral.ProofGeneralPlugin;
import ed.inf.proofgeneral.pgipdatastructure.BrokerStatus;
import ed.inf.proofgeneral.sessionmanager.SessionManager;

/**
 * @author Elemental
 *
 */
public class ProversPrefsPage //extends FieldEditorPreferencePage implements IWorkbenchPreferencePage
{
	
	private TableViewer viewer;
	
	/**
	 *	 
	 */
	public ProversPrefsPage()
	{
	}

	protected void createFieldEditors()
	{
		createWidgets(getFieldEditorParent());
	}

	public void init(IWorkbench workbench)
	{
		// TODO Auto-generated method stub
		
	}
	
	public Composite ourComposite;
	private void createWidgets(Composite parent)
	{
		ourComposite = new Composite(parent,SWT.NONE);
		GridLayout layout = new GridLayout(2,false);
		ourComposite.setLayout(layout);
		ourComposite.setFont(parent.getFont());
		layout.marginHeight = layout.marginWidth = 0;
		GridData data = new GridData(SWT.FILL,SWT.FILL, true, true );
		data.widthHint = 200;
		ourComposite.setLayoutData(data);
		
		Table proverTable = new Table(ourComposite, SWT.CENTER | SWT.BORDER | SWT.FULL_SELECTION);
		data = new GridData(SWT.FILL,SWT.FILL, true, true );
		proverTable.setLayoutData(data);
		proverTable.setFont(parent.getFont());
		viewer = buildAndLayoutTable(proverTable);
		
		attachContentProvider(viewer);
		attachLabelProvider(viewer);
		BrokerStatus b = new BrokerStatus();
		b.addRunningProver("123","1123");
//		viewer.setInput(SessionManager.getDefault().getBrokerStatus());		
		viewer.setInput(b);
		//Sample code if one wants to add a pop menu for prover actions here.
//		MenuManager popupMenu = new MenuManager();
//		IAction newRowAction = new NewRowAction();
//		popupMenu.add(newRowAction);
//		Menu menu = popupMenu.createContextMenu(table);
//		table.setMenu(menu);
//		viewer.setInput(CONTENT);
	
		
	}
	
	private void attachLabelProvider(TableViewer viewer)
	{
		viewer.setLabelProvider(new ITableLabelProvider()
		{
			public String getColumnText(Object element, int index)
			{
				switch (index)
				{
					case 0:
						return ((ProverTableItem) element).provername;
					case 1:
						return ((ProverTableItem) element).proverid;
					case 2:
						return ((ProverTableItem) element).status;
					default:
						return "";
				}
			}

			public Image getColumnImage(Object element, int columnIndex)
			{
				return null;
			}

			public void addListener(ILabelProviderListener listener)
			{
			}

			public void dispose()
			{
			}

			public boolean isLabelProperty(Object element, String property)
			{
				return false;
			}

			public void removeListener(ILabelProviderListener listener)
			{
			}
		});
		
	}

	private void attachContentProvider(TableViewer viewer)
	{
		// TODO Auto-generated method stub
		viewer.setContentProvider(new IStructuredContentProvider()
		{
			public Object[] getElements(Object input)
			{
				Vector result = new Vector();
				if (input instanceof BrokerStatus)
				{
					BrokerStatus brokerStatus = (BrokerStatus) input;
					HashMap hm = brokerStatus.getRunningprovers();
					Set keyset = hm.keySet();
					ProverTableItem tableItem;
					for (Iterator i = keyset.iterator(); i.hasNext();)
					{
						Object proverid = i.next();
						tableItem = new ProverTableItem((String)hm.get(proverid)
														,(String)proverid
														,"Running");
						result.add(tableItem);
					}
					hm = brokerStatus.getKnownprovers();
					keyset = hm.keySet();
					for (Iterator i = keyset.iterator(); i.hasNext();)
					{
						Object proverid = i.next();
						tableItem = new ProverTableItem((String)hm.get(proverid)
														,"Not running yet"
														,"Not running yet");
						result.add(tableItem);
					}
				}
				return result.toArray();
			}

			public void dispose()
			{
			}

			public void inputChanged(Viewer viewer, Object oldInput,
					Object newInput)
			{
				// TODO Auto-generated method stub

			}
		});
	}

	private TableViewer buildAndLayoutTable(Table table)
	{
		TableViewer tableViewer = new TableViewer(table);
		TableLayout layout = new TableLayout();
		layout.addColumnData(new ColumnWeightData(35, 75, true));
		layout.addColumnData(new ColumnWeightData(40, 75, true));
		layout.addColumnData(new ColumnWeightData(25, 75, true));
		table.setLayout(layout);
		TableColumn nameColumn = new TableColumn(table, SWT.CENTER);
		nameColumn.setText("Prover Name");
		TableColumn idColumn = new TableColumn(table, SWT.CENTER);
		idColumn.setText("Prover ID");
		TableColumn statusColumn = new TableColumn(table, SWT.CENTER);
		statusColumn.setText("Status");
		table.setHeaderVisible(true);
		table.setLinesVisible(true);
		return tableViewer;
	}
	
	class ProverTableItem
	{
		public String provername;
		public String proverid;
		public String status;
		public ProverTableItem( String n, String i, String s)
		{
			provername = n;
			proverid = i;
			status = s;
		}
	}
	
	public static void main(String[] args)
	{
		
		Display display = new Display();
		Shell shell = new Shell(display);
		ProversPrefsPage r = new ProversPrefsPage();
		r.createWidgets(shell);
		shell.update();
		shell.pack();
		shell.open();
		while (!shell.isDisposed())
		{
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}	
	
	
}