TableViewerFactory.java

package waelti.statistics.views;

import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;

import waelti.statistics.actions.ColumnSorterAdapter;
import waelti.statistics.queries.AbstractQuery;

/** Creates a SWT Table containing the results of the given query. */
public class TableViewerFactory {
	
	/** Parent of the viewer to be created. */
	private Composite parent;
	private AbstractQuery query;
	
	/** constructor */
	public TableViewerFactory(Composite parent, AbstractQuery query){
		this.parent = parent;
		this.query = query;
		
	}
	
	/** Creates a table viewer containing the query's data. */
	public TableViewer createTableViewer(){
		Table table = this.createTable();
		
		TableViewer viewer = new TableViewer(table);
		viewer.setContentProvider(this.query.getContentProvider());
		viewer.setLabelProvider(this.query.getLabelProvider());
		this.addColumnSort(viewer);
		
		viewer.setInput(""); // fill the table
		packColumns(viewer.getTable()); // width of single columns
		return viewer;
	}
	
	private Table createTable(){
		Table table = new Table(parent, SWT.H_SCROLL | SWT.V_SCROLL);
		
		GridData data = new GridData(GridData.FILL_VERTICAL | GridData.FILL_HORIZONTAL);
		data.grabExcessHorizontalSpace = true;
		table.setLayoutData(data);
		table.setHeaderVisible(true);
		
		this.createColumns(table);
		
		return table;
	}
	
	private void packColumns(Table table){
		TableColumn[] col = table.getColumns();
		
		for (int i = 0; i < col.length; i++) {
			col[i].pack();
		}
	}
	
	private void createColumns(Table table){
		int i = 0;
		for (String text : this.query.getTableHeadings()) {
			TableColumn column = new TableColumn(table, SWT.LEFT);
			column.setText(text);
			column.setWidth(text.length() * 8);
			// this.addColumnSort(column, i);
			i++;
		}
	}
	
	private void addColumnSort(TableViewer viewer){
		TableColumn[] cols = viewer.getTable().getColumns();
		for (int i = 0; i < cols.length; i++) {
			cols[i].addSelectionListener(new ColumnSorterAdapter(viewer, i));
		}
		
	}
	
	public AbstractQuery getQuery(){
		return query;
	}
	
	public void setQuery(AbstractQuery query){
		this.query = query;
	}
}