package net.sourceforge.phpdt.sql.view;

import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.ViewPart;

import net.sourceforge.phpdt.sql.view.bookmark.Root;
import net.sourceforge.phpdt.sql.view.query.QueryContentProvider;
import net.sourceforge.phpdt.sql.view.query.QueryNode;

public class QueryHistoryView extends ViewPart {
	private static QueryHistoryView instance;
	private QueryContentProvider provider = new QueryContentProvider();
	private TreeViewer treeViewer;
	
	public static QueryHistoryView getInstance() {
		return instance;
	}
	public Object getCurrent() {
		StructuredSelection selection = (StructuredSelection) treeViewer.getSelection();
		if (selection != null) {
			return selection.getFirstElement();
		}
		return null;
	}
	public void createPartControl(Composite parent) {
		instance = this;
		treeViewer = new TreeViewer(parent);
		treeViewer.setContentProvider(provider);
		treeViewer.setLabelProvider(new BookmarkLabelProvider());
		treeViewer.setInput(Root.ROOT);
		treeViewer.addDoubleClickListener(new IDoubleClickListener() {
			public void doubleClick(DoubleClickEvent event) {
				Object sel = getCurrent();
				if (sel instanceof QueryNode) {
					QueryNode node = (QueryNode) sel;
					SQLQueryView.getInstance().setQuery(node.getQuery());
				}
			}
		});
		treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				Object sel = getCurrent();
				if (sel != null) {
					// preview goes here
				}
			}
		}
		);
	}
	
	public void addQuery(String query) {
		provider.addQuery(query);
		treeViewer.refresh();
	}
	
	public void setFocus() {
	}
}