// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.forms.client.components.nonpublic;

import org.litesoft.GWT.client.widgets.Button;
import org.litesoft.GWT.client.widgets.nonpublic.*;
import org.litesoft.GWT.forms.client.components.nonpublic.datepicker.*;
import org.litesoft.GWT.forms.client.components.nonpublic.datepicker.impl.*;
import org.litesoft.commonfoundation.base.*;

import com.google.gwt.event.dom.client.*;
import com.google.gwt.user.client.ui.*;

import java.util.*;

/**
 * TODO: migrate to {@link com.google.gwt.user.datepicker.client.DatePicker}
 */
@SuppressWarnings({"deprecation"})
public abstract class ExtendableDatePicker extends DatePicker implements ClickHandler {
    private DialogButtonPanel mDialogButtonPanel;

    protected ExtendableDatePicker() {
        showAdjacentMonths( true );
        showYearMonthListing( true );
    }

    @Override
    public final void showTodayButton( boolean show ) {
        throw new IllegalStateException( "showTodayButton no longer supporter" );
    }

    protected final void addExtensionPanel( Widget pExtensionPanel ) {
        if ( pExtensionPanel != null ) {
            ((VerticalPanel) getWidget()).add( pExtensionPanel );
        }
    }

    protected final void addDialogButtonPanel( Button... pButtons ) {
        addExtensionPanel( mDialogButtonPanel = new DialogButtonPanel( this, pButtons ) );
    }

    @Override
    public void onClick( ClickEvent event ) {
        onClick( (Widget) event.getSource() );
    }

    @Override
    public final void onClick( Widget sender ) {
        if ( sender instanceof DatePickerCell ) {
            super.onClick( sender );
            if ( -1 == ConstrainTo.notNull( sender.getStyleName() ).indexOf( "control" ) ) {
                dateSelectedByClick( selectedDate() );
            }
        } else if ( (mDialogButtonPanel != null) && mDialogButtonPanel.isOurButton( sender ) ) {
            dialogButtonClicked( (Button) sender );
        }
    }

    abstract protected void dialogButtonClicked( Button pButton );

    abstract protected void dateSelectedByClick( Date pDate );

    @Override
    public void show() {
        CommonElementHelper.hide( getElement() );
        super.show();
        CommonElementHelper.unhide( getElement() );
    }
}