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// Metawidget
//
// This file is dual licensed under both the LGPL
// (http://www.gnu.org/licenses/lgpl-2.1.html) and the EPL
// (http://www.eclipse.org/org/documents/epl-v10.php). As a
// recipient of Metawidget, you may choose to receive it under either
// the LGPL or the EPL.
//
// Commercial licenses are also available. See http://metawidget.org
// for details.

package org.metawidget.android.widget.layout;

import org.metawidget.android.widget.AndroidMetawidget;

import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ListView;
import android.widget.TableRow;
import android.widget.TextView;

/**
 * Layout to arrange widgets in a table, with one column for labels and another for the widget.
 *
 * @author Richard Kennard
 */

public class TableLayout
	extends LinearLayout {

	//
	// Private statics
	//

	private static final int	LABEL_AND_WIDGET	= 2;

	//
	// Constructor
	//

	public TableLayout() {

		this( new LinearLayoutConfig() );
	}

	public TableLayout( LinearLayoutConfig config ) {

		super( config );
	}

	//
	// Public methods
	//

	@Override
	public void endContainerLayout( ViewGroup container, AndroidMetawidget metawidget ) {

		// If the TableLayout was never used, just put an empty space

		if ( container.getChildCount() == 0 ) {
			container.addView( new TextView( metawidget.getContext() ), new android.widget.LinearLayout.LayoutParams( ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT ) );
		}

		// Add footer

		super.endContainerLayout( container, metawidget );
	}

	//
	// Protected methods
	//

	@Override
	protected void layoutWidget( View view, ViewGroup tableRow, ViewGroup container, boolean hasLabel ) {

		// View

		View viewToAdd = view;

		// Hack for sizing ListViews

		if ( view instanceof ListView ) {
			FrameLayout frameLayout = new FrameLayout( tableRow.getContext() );

			if ( view.getLayoutParams() == null ) {
				view.setLayoutParams( new FrameLayout.LayoutParams( 325, 100 ) );
			}

			frameLayout.addView( view );

			viewToAdd = frameLayout;
		}

		// (always override LayoutParams, just in case)

		TableRow.LayoutParams params = new TableRow.LayoutParams();

		if ( !hasLabel ) {
			params.span = LABEL_AND_WIDGET;
		}

		// Add it to our layout

		tableRow.addView( viewToAdd, params );
		getLayout( container ).addView( tableRow, new android.widget.TableLayout.LayoutParams() );
	}

	@Override
	protected ViewGroup newViewToAddTo( ViewGroup container ) {

		return new TableRow( container.getContext() );
	}

	/**
	 * Initialize the TableLayout.
	 * 
	 * We don't initialize the TableLayout unless we find we have something to put into it, because
	 * Android doesn't like empty TableLayouts.
	 */

	@Override
	protected android.widget.TableLayout getLayout( ViewGroup container ) {

		if ( container.getChildCount() == 0 || !( container.getChildAt( container.getChildCount() - 1 ) instanceof android.widget.TableLayout ) ) {
			android.widget.TableLayout layout = new android.widget.TableLayout( container.getContext() );
			layout.setOrientation( android.widget.LinearLayout.VERTICAL );
			layout.setColumnStretchable( 1, true );

			container.addView( layout, new android.widget.LinearLayout.LayoutParams( ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT ) );
			return layout;
		}

		return (android.widget.TableLayout) container.getChildAt( container.getChildCount() - 1 );
	}
}