SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.emulator.uiform;

import cc.squirreljme.jvm.mle.callbacks.UIFormCallback;
import cc.squirreljme.jvm.mle.constants.UIWidgetProperty;
import java.awt.Component;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;

/**
 * Listener for component events.
 *
 * @since 2020/10/17
 */
public class HandleComponentEvents
    extends AbstractListener
    implements ComponentListener
{
    /**
     * Initializes the handler.
     * 
     * @param __item The item to watch.
     * @throws NullPointerException On null arguments.
     * @since 2020/10/17
     */
    public HandleComponentEvents(SwingWidget __item)
        throws NullPointerException
    {
        super(__item);
    }
    
    /**
     * {@inheritDoc}
     * @since 2020/10/17
     */
    @Override
    public void componentResized(ComponentEvent __e)
    {
        SwingWidget widget = this.item();
        if (widget == null)
            return;
        
        UIFormCallback callback = widget.callback();
        if (callback == null)
            return;
        
        // Report changes
        Component component = __e.getComponent();
        callback.propertyChange(widget.form(), widget.item(),
            UIWidgetProperty.INT_WIDTH_AND_HEIGHT, 0, component.getWidth(), component.getHeight());
    }
    
    /**
     * {@inheritDoc}
     * @since 2020/10/17
     */
    @Override
    public void componentMoved(ComponentEvent __e)
    {
        SwingWidget widget = this.item();
        if (widget == null)
            return;
        
        UIFormCallback callback = widget.callback();
        if (callback == null)
            return;
        
        // Report changes
        Component component = __e.getComponent();
        callback.propertyChange(widget.form(), widget.item(),
            UIWidgetProperty.INT_X_POSITION, 0, -1, component.getX());
        callback.propertyChange(widget.form(), widget.item(),
            UIWidgetProperty.INT_Y_POSITION, 0, -1, component.getY());
    }
    
    /**
     * {@inheritDoc}
     * @since 2020/10/17
     */
    @Override
    public void componentShown(ComponentEvent __e)
    {
        SwingWidget widget = this.item();
        if (widget == null)
            return;
        
        UIFormCallback callback = widget.callback();
        if (callback == null)
            return;
        
        // Report changes
        callback.propertyChange(widget.form(), widget.item(),
            UIWidgetProperty.INT_IS_SHOWN, 0, -1, 1);
    }
    
    /**
     * {@inheritDoc}
     * @since 2020/10/17
     */
    @Override
    public void componentHidden(ComponentEvent __e)
    {
        SwingWidget widget = this.item();
        if (widget == null)
            return;
        
        UIFormCallback callback = widget.callback();
        if (callback == null)
            return;
        
        // Report changes
        callback.propertyChange(widget.form(), widget.item(),
            UIWidgetProperty.INT_IS_SHOWN, 0, -1, 0);
    }
}