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

import org.litesoft.GWT.client.widgets.nonpublic.*;

import com.google.gwt.core.client.*;
import com.google.gwt.user.client.*;
import com.google.gwt.user.client.ui.*;
import com.google.gwt.user.client.ui.impl.*;

public class SizeableFrameWithGlass extends SizeableFrame {
    private static final PopupImpl sImpl = (PopupImpl) GWT.create( PopupImpl.class );

    private Element mGlassDiv;

    public SizeableFrameWithGlass() {
        DOM.setElementProperty( mFrame.getElement(), "scrolling", "no" );

        mGlassDiv = DOM.createDiv();

        Element styleDiv = getStyleElement();
        DOM.appendChild( CommonElementHelper.setPositionRelative( styleDiv ), CommonElementHelper.setPositionAbsolute( mGlassDiv ) );
        CommonElementHelper.setLeft( mGlassDiv, 0 );
        CommonElementHelper.setTop( mGlassDiv, 0 );
        CommonElementHelper.setWidth( mGlassDiv, 200 );
        CommonElementHelper.setHeight( mGlassDiv, 160 );
        CommonElementHelper.setStyleClass( mGlassDiv, "litesoft-FrameGlassPanel" );
    }

    public SizeableFrameWithGlass( String url ) {
        this();
        setUrl( url );
    }

    private ClickListener mClickListener = null;

    public void addClickListener( ClickListener pClickListener ) {
        if ( pClickListener != null ) {
            if ( mClickListener == null ) {
                DOM.sinkEvents( mGlassDiv, Event.ONCLICK );
            }
            mClickListener = pClickListener;
        }
    }

    @Override
    public void onBrowserEvent( Event event ) {
        if ( (Event.ONCLICK == DOM.eventGetType( event )) && (mClickListener != null) ) {
            mClickListener.onClick( this );
            return;
        }
        super.onBrowserEvent( event );
    }

    @Override
    protected void onAttach() {
        super.onAttach();
        sImpl.onShow( mGlassDiv );
        DOM.setEventListener( mGlassDiv, this );
    }

    @Override
    protected void onDetach() {
        // todo: throws Exception in IE:    sImpl.onHide( mGlassDiv );
        if ( mDeferredProcess != null ) {
            mDeferredProcess.cancel();
            mDeferredProcess = null;
        }
        DOM.setEventListener( mGlassDiv, null );
        super.onDetach();
    }

    @Override
    public void setWidth( String width ) {
        super.setWidth( width );
        forceGlassSize();
    }

    @Override
    public void setHeight( String height ) {
        super.setHeight( height );
        forceGlassSize();
    }

    protected void forceGlassWidth() {
        CommonElementHelper.setWidth( mGlassDiv, mFrame.getOffsetWidth() );
    }

    protected void forceGlassHeight() {
        CommonElementHelper.setHeight( mGlassDiv, mFrame.getOffsetHeight() );
    }

    protected void forceGlassSize() {
        if ( mDeferredProcess == null ) {
            Scheduler.get().scheduleDeferred( mDeferredProcess = new MyDeferredProcess() );
        }
    }

    private MyDeferredProcess mDeferredProcess = null;

    private class MyDeferredProcess extends Timer implements Command {
        @Override
        public void execute() {
            schedule( 10 );
        }

        @Override
        public void run() {
            forceGlassWidth();
            forceGlassHeight();
            mDeferredProcess = null;
        }
    }
}