/* 
@ITMillApache2LicenseForJavaFiles@
 */

package com.vaadin.ui;

import java.util.Collection;

import com.vaadin.data.Container;
import com.vaadin.terminal.PaintException;
import com.vaadin.terminal.PaintTarget;
import com.vaadin.terminal.gwt.client.ui.VNativeSelect;

/**
 * This is a simple drop-down select without, for instance, support for
 * multiselect, new items, lazyloading, and other advanced features. Sometimes
 * "native" select without all the bells-and-whistles of the ComboBox is a
 * better choice.
 */
@SuppressWarnings("serial")
@ClientWidget(VNativeSelect.class)
public class NativeSelect extends AbstractSelect {

    // width in characters, mimics TextField
    private int columns = 0;

    public NativeSelect() {
        super();
    }

    public NativeSelect(String caption, Collection<?> options) {
        super(caption, options);
    }

    public NativeSelect(String caption, Container dataSource) {
        super(caption, dataSource);
    }

    public NativeSelect(String caption) {
        super(caption);
    }

    /**
     * Sets the number of columns in the editor. If the number of columns is set
     * 0, the actual number of displayed columns is determined implicitly by the
     * adapter.
     * 
     * @param columns
     *            the number of columns to set.
     */
    public void setColumns(int columns) {
        if (columns < 0) {
            columns = 0;
        }
        if (this.columns != columns) {
            this.columns = columns;
            requestRepaint();
        }
    }

    public int getColumns() {
        return columns;
    }

    @Override
    public void paintContent(PaintTarget target) throws PaintException {
        target.addAttribute("type", "native");
        // Adds the number of columns
        if (columns != 0) {
            target.addAttribute("cols", columns);
        }

        super.paintContent(target);
    }

    @Override
    public void setMultiSelect(boolean multiSelect)
            throws UnsupportedOperationException {
        if (multiSelect == true) {
            throw new UnsupportedOperationException("Multiselect not supported");
        }
    }

    @Override
    public void setNewItemsAllowed(boolean allowNewOptions)
            throws UnsupportedOperationException {
        if (allowNewOptions == true) {
            throw new UnsupportedOperationException(
                    "newItemsAllowed not supported");
        }
    }

}
