tabular-data-csv-export-widget/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVExportConfigCard.java

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


import org.gcube.portlets.user.csvexportwidget.client.grid.ColumnDataGridPanel;
import org.gcube.portlets.user.td.gwtservice.client.rpc.TDGWTServiceAsync;
import org.gcube.portlets.user.td.gwtservice.shared.csv.AvailableCharsetList;
import org.gcube.portlets.user.td.gwtservice.shared.csv.CSVExportSession;
import org.gcube.portlets.user.td.wizardwidget.client.WizardCard;

import com.allen_sauer.gwt.log.client.Log;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.event.logical.shared.SelectionHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.HasValue;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.sencha.gxt.cell.core.client.form.ComboBoxCell.TriggerAction;
import com.sencha.gxt.core.client.util.Padding;
import com.sencha.gxt.core.client.util.ToggleGroup;
import com.sencha.gxt.data.shared.StringLabelProvider;
import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer;
import com.sencha.gxt.widget.core.client.form.FieldLabel;
import com.sencha.gxt.widget.core.client.form.FormPanel;
import com.sencha.gxt.widget.core.client.form.Radio;
import com.sencha.gxt.widget.core.client.form.SimpleComboBox;
import com.sencha.gxt.widget.core.client.form.TextField;
import com.sencha.gxt.widget.core.client.tips.ToolTip;
import com.sencha.gxt.widget.core.client.tips.ToolTipConfig;

/**
 * 
 * @author "Giancarlo Panichi" <a
 *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
 * 
 */
public class CSVExportConfigCard extends WizardCard {

	private static final String DEFAULT_DELIMETER = ",";
	protected CSVExportSession csvExportSession;

	protected SimpleComboBox<String> encodings;
	protected TextField customDelimiterField;
	protected Radio otherDelimiter;
	protected Radio commaDelimiter;
	protected Radio spaceDelimiter;
	protected Radio tabDelimiter;
	protected Radio semicoloDelimiter;
	
	protected ColumnDataGridPanel csvColumnGridPanel;

	public CSVExportConfigCard(final CSVExportSession csvExportSession) {
		super("CSV configuration", "");
		if (csvExportSession == null) {
			Log.error("CSVExportSession is null");
		}
		this.csvExportSession = csvExportSession;

		FormPanel panel = createPanel();
		setContent(panel);

	}

	protected FormPanel createPanel() {
		FormPanel panel = new FormPanel();
		panel.setLabelWidth(90);
		panel.getElement().setPadding(new Padding(5));

		VerticalLayoutContainer content = new VerticalLayoutContainer();
		panel.add(content);

		encodings = new SimpleComboBox<String>(
				new StringLabelProvider<String>());
		encodings.setToolTip("The CSV file encoding");
		encodings.setTabIndex(0);
		encodings.setEditable(false);
		encodings.setForceSelection(true);
		encodings.setTriggerAction(TriggerAction.ALL);
		encodings.addSelectionHandler(new SelectionHandler<String>() {

			@Override
			public void onSelection(SelectionEvent<String> event) {
				//updateGrid();
			}
		});

		content.add(new FieldLabel(encodings, "File encoding"));

		

		commaDelimiter = new Radio();
		commaDelimiter.setBoxLabel("Comma");
		commaDelimiter.setValue(true);

		spaceDelimiter = new Radio();
		spaceDelimiter.setBoxLabel("Space");

		tabDelimiter = new Radio();
		tabDelimiter.setBoxLabel("Tab");

		semicoloDelimiter = new Radio();
		semicoloDelimiter.setBoxLabel("Semicolon");

		otherDelimiter = new Radio();
		otherDelimiter.setBoxLabel("Other delimiter");

		customDelimiterField = new TextField();
		customDelimiterField.setEnabled(false);
		customDelimiterField.setValue(DEFAULT_DELIMETER);
		customDelimiterField.setAllowBlank(false);
		customDelimiterField.setWidth(20);

		ToggleGroup delimitersGroup = new ToggleGroup();
		delimitersGroup.add(commaDelimiter);
		delimitersGroup.add(spaceDelimiter);
		delimitersGroup.add(tabDelimiter);
		delimitersGroup.add(semicoloDelimiter);
		delimitersGroup.add(otherDelimiter);

		delimitersGroup
				.addValueChangeHandler(new ValueChangeHandler<HasValue<Boolean>>() {

					@Override
					public void onValueChange(
							ValueChangeEvent<HasValue<Boolean>> event) {

						customDelimiterField.setEnabled(otherDelimiter
								.getValue());

						if (!otherDelimiter.getValue())
							customDelimiterField.clearInvalid();
						else
							customDelimiterField.validate();

						if (otherDelimiter.getValue()
								&& !customDelimiterField.isValid())
							return;
					}
				});

		HorizontalPanel delimitersPanel = new HorizontalPanel();
		delimitersPanel.add(commaDelimiter);
		delimitersPanel.add(spaceDelimiter);
		delimitersPanel.add(tabDelimiter);
		delimitersPanel.add(semicoloDelimiter);
		delimitersPanel.add(otherDelimiter);
		delimitersPanel.add(customDelimiterField);

		new ToolTip(delimitersPanel, new ToolTipConfig(
				"The delimiter use to delimit the CSV fields"));
		content.add(new FieldLabel(delimitersPanel, "Delimiter"));

		
		csvColumnGridPanel=new ColumnDataGridPanel();
		content.add(csvColumnGridPanel);
		
		return panel;
	}

	
	protected char getSelectedDelimiter() {
		if (otherDelimiter.getValue())
			return customDelimiterField.getValue().charAt(0);
		if (commaDelimiter.getValue())
			return ',';
		if (spaceDelimiter.getValue())
			return ' ';
		if (tabDelimiter.getValue())
			return '\t';
		if (semicoloDelimiter.getValue())
			return ';';
		return DEFAULT_DELIMETER.charAt(0);
	}

	@Override
	public void setup() {
		setEnableBackButton(true);
		setEnableNextButton(false);
		encodings.focus();

		TDGWTServiceAsync.INSTANCE
				.getAvailableCharset(new AsyncCallback<AvailableCharsetList>() {

					@Override
					public void onSuccess(AvailableCharsetList result) {
						GWT.log("CharsetInfo: "
								+ result.getCharsetList().size()
								+ " charset, default: "
								+ result.getDefaultCharset());

						for (String charset : result.getCharsetList())
							encodings.add(charset);

						encodings.setValue(result.getDefaultCharset());
						
					}

					/**
					 * {@inheritDoc}
					 */
					@Override
					public void onFailure(Throwable caught) {
						GWT.log("Error loading charset list", caught);
						showErrorAndHide("Error loading charset list",
								"Error loading charset list", "", caught);
					}
				});

		

		Command sayNextCard = new Command() {

			@Override
			public void execute() {
				//CSVTableDetailCard csvTableDetailCard = new CSVTableDetailCard(
				//		csvImportSession);
				//getWizardWindow()
				//		.addCard(csvTableDetailCard);
				Log.info("NextCard CSVTableDetailCard");
				//getWizardWindow().nextCard();
				
			}

		};

		getWizardWindow().setNextButtonCommand(sayNextCard);

	}

	@Override
	public void dispose() {
		//csvExportSession
		//		.setColumnToImportMask(csvSample.getImportColumnsMask());
	}
	
	
	

}