Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.function.programming;

import java.awt.Dimension;

import java.awt.image.BufferedImage;

import java.net.URL;

import javax.swing.ImageIcon;

import javax.swing.JLabel;

import org.apache.commons.lang3.Range;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.impl.function.image.ImageFromHTMLFunction;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class CreateHtmlPanelFunction extends AbstractFunction {

    private static final Logger LOGGER = LoggerFactory.getLogger(CreateHtmlPanelFunction.class);

    public CreateHtmlPanelFunction() {

        super(Function.GROUP_PROGRAMMING,

                "CREATE_HTMLPANEL",

                Range.is(1),

                null,

                "CREATE_HTMLPANEL"+ "({{with}}, height, source)",

                new String[]{

                    "width - with of the image in pixels",

                    "height - height of the image in pixels",

                    "source - HTML source or URL"

                },

                "JPanel",

                false

        );

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

    public Object call(Interpreter interpreter, Object[] args) throws Exception {

        int width = this.getInt(args, 0);

        int height = this.getInt(args, 1);

        String source = this.getStr(args, 2);

        URL url = null;

        try {

            url = new URL(source);

        } catch (Exception ex) {

            LOGGER.debug("Can't parse url", ex);

        }

        BufferedImage img = ImageFromHTMLFunction.createImageFromHTML(width, height, url, source);

        if( img == null ) {

            return null;

        }

        JLabel comp = new JLabel(new ImageIcon(img));

        comp.setPreferredSize(new Dimension(width, height));

        comp.setSize(new Dimension(width, height));

        comp.setOpaque(false);

        return comp;

    }

}