tabular-data-expression-widget/src/main/java/org/gcube/portlets/user/td/expressionwidget/client/ColumnExpressionPanel.java

package org.gcube.portlets.user.td.expressionwidget.client;

import org.gcube.portlets.user.td.gwtservice.client.rpc.TDGWTServiceAsync;
import org.gcube.portlets.user.td.gwtservice.shared.tr.ColumnData;
import org.gcube.portlets.user.td.widgetcommonevent.shared.TRId;

import com.allen_sauer.gwt.log.client.Log;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.sencha.gxt.core.client.dom.ScrollSupport.ScrollMode;
import com.sencha.gxt.widget.core.client.FramedPanel;
import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer;
import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData;
import com.sencha.gxt.widget.core.client.form.FieldLabel;
import com.sencha.gxt.widget.core.client.form.TextArea;
import com.sencha.gxt.widget.core.client.form.TextField;

/**
 * 
 * @author "Giancarlo Panichi" 
 * <a href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a> 
 *
 */
public class ColumnExpressionPanel extends FramedPanel {
	protected TRId trId;
	protected String columnName=null;
	protected ColumnData column;
	//protected ComboBox<ColumnData> combo=null;
	
	/**
	 * 
	 * @param columnTypeCode
	 * @param dataTypeName
	 */
	public ColumnExpressionPanel(String columnId, String columnTypeCode, String dataTypeName) {
		column=new ColumnData();
		column.setColumnId(columnId);
		column.setDataTypeName(dataTypeName);
		column.setTypeCode(columnTypeCode);
		create();
	}

	/**
	 * 
	 * @param trId
	 * @param columnName
	 */
	public ColumnExpressionPanel(TRId trId, String columnName) {
		this.trId=trId;
		this.columnName=columnName;
		load(trId, columnName);
	}

	protected void create() {
		setBodyBorder(false);
		// getHeader().setIcon(Resources.IMAGES.side_list());
		setWidth(400);
		setHeight(400);
		setResize(true);
		
		VerticalLayoutContainer basicLayout = new VerticalLayoutContainer();
	    basicLayout.setScrollMode(ScrollMode.AUTO);
	    basicLayout.setAdjustForScroll(true);
	   
	    
	    TextField nome= new TextField();
	    basicLayout.add(new FieldLabel(nome, "Nome"), new VerticalLayoutData(1, -1));
	    
	    TextArea descrizione= new TextArea();
	    basicLayout.add(new FieldLabel(descrizione, "Descrizione"), new VerticalLayoutData(1, -1));
	    
	    
	    ConditionWidget conditionWidget =new ConditionWidget(column.getColumnId(), column.getTypeCode(), column.getDataTypeName());
	    basicLayout.add(conditionWidget);
	    
	    add(basicLayout);
	    show();

	    /*
		ContentPanel panel = new ContentPanel();
		panel.setHeaderVisible(false);
		
		//panel.setBodyStyle("margin: 0px;");
		
		ColumnDataProperties props = GWT.create(ColumnDataProperties.class);
		ListStore<ColumnData> store = new ListStore<ColumnData>(props.id());
		
		Log.trace("Store created");
		RpcProxy<ListLoadConfig, ListLoadResult<ColumnData>> proxy = new RpcProxy<ListLoadConfig,  ListLoadResult<ColumnData>>() {
			
			public void load(ListLoadConfig loadConfig, final AsyncCallback<ListLoadResult<ColumnData>> callback) {
				loadData(loadConfig, callback);
			}	
		};
		final ListLoader<ListLoadConfig, ListLoadResult<ColumnData>> loader = new ListLoader<ListLoadConfig, ListLoadResult<ColumnData>>(proxy);
		loader.setRemoteSort(false);
		loader.addLoadHandler(new LoadResultListStoreBinding<ListLoadConfig, ColumnData, ListLoadResult<ColumnData>>(store));
		Log.trace("Loader created");
		
		
		combo = new ComboBox<ColumnData>(store,
				props.label()){
			@Override
			protected void onAfterFirstAttach() {
				super.onAfterFirstAttach();
				Scheduler.get().scheduleDeferred(new ScheduledCommand() {
					public void execute() {
						loader.load();
					}
				});
			}
		};
		Log.trace("Combo created");
		
		addHandlersForEventObservation(combo, props.label());

		combo.setEmptyText("Select a column...");
		combo.setWidth(150);
		combo.setTypeAhead(true);
		combo.setTriggerAction(TriggerAction.ALL);
		combo.setLoader(loader);
		
		FramedPanel form = new FramedPanel();
	    form.setHeaderVisible(false);
	    //form.setWidth(350);
	    form.setBodyStyle("background: none;");
	 
	    VerticalLayoutContainer v = new VerticalLayoutContainer();
	    v.add(new FieldLabel(combo, "Column"), new VerticalLayoutData(1, -1));
	    form.add(v);
	    form.addButton(new TextButton("Remove"));
	   
	    
	    panel.add(form);
	    
	    basicLayout.add(panel, new VerticalLayoutData(-1, -1, new Margins()));
		*/
		
	}
    
	/*
	private <T> void addHandlersForEventObservation(ComboBox<T> combo,
			final LabelProvider<T> labelProvider) {
		combo.addValueChangeHandler(new ValueChangeHandler<T>() {

			public void onValueChange(ValueChangeEvent<T> event) {
				Info.display(
						"Value Changed",
						"New value: "
								+ (event.getValue() == null ? "nothing"
										: labelProvider.getLabel(event
												.getValue()) + "!"));
				
			}
		});
		combo.addSelectionHandler(new SelectionHandler<T>() {
			public void onSelection(SelectionEvent<T> event) {
				Info.display(
						"State Selected",
						"You selected "
								+ (event.getSelectedItem() == null ? "nothing"
										: labelProvider.getLabel(event
												.getSelectedItem()) + "!"));
			}
		});
	}
	
	 */
		
		

	protected void load(TRId trId, String columnName) {
		TDGWTServiceAsync.INSTANCE.getColumn(trId,columnName, new AsyncCallback<ColumnData>(){

			public void onFailure(Throwable caught) {
				Log.error("Error retrieving column: "+caught.getMessage());
				
			}

			public void onSuccess(ColumnData result) {
				Log.debug("Retrived column: "+result);
				column=result;
				create();
			}
			
		});

				
	}

}