NF8.2 Event Status Line

Feature: Event Status Line

Goal: Development

Developer: Carlos Ruiz

Description:

Now you can add complex things in the Quick Info panel using java code capturing the event MStatusLine.BEFORE_PARSE_STATUS_LINE.

Let's explain it with an example to render a QR Code from the Description on the Test table:

Message

For this example we need a very simple message to fill with a String, so we simply define the message as {0}

Status Line

The SQL definition for the status line is also very simple, we simply need to get the context variable from the Dual table.

SELECT '@MyComplexVariable@' FROM Dual

Note the context variable is going to be filled on an EventHandler in a plugin, shown in the next step.

Java Class

import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;

public class TestEventHandler extends AbstractEventHandler {

    @Override
    protected void initialize() {
        registerEvent(MStatusLine.BEFORE_PARSE_STATUS_LINE);
    }   

    @Override
    protected void doHandleEvent(Event event) {
        if (MStatusLine.BEFORE_PARSE_STATUS_LINE.equals(event.getTopic())) {
            MStatusLine sl = (MStatusLine) event.getProperty(EventManager.EVENT_DATA);
            int windowNo = (int) event.getProperty(MStatusLine.EVENT_WINDOWNO);

            String description = Env.getContext(sl.getCtx(), windowNo, "Description");

            /*          
             *  alternatively - if description is not in the context, you can use 
            int testId = Env.getContextAsInt(sl.getCtx(), windowNo, "Test_ID"); 
            MTest test = new MTest(sl.getCtx(), testId, sl.get_TrxName());
            String description = test.getDescription();
            */          
                        
            QRCodeWriter qrCodeWriter = new QRCodeWriter();
            BitMatrix bitMatrix;
            try {       
                bitMatrix = qrCodeWriter.encode(description, BarcodeFormat.QR_CODE, 240, 240);
            } catch (WriterException e) {
                throw new AdempiereException(e);
            }           
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            try {       
                MatrixToImageWriter.writeToStream(bitMatrix,"png", outputStream);
            } catch (IOException e) {
                throw new AdempiereException(e);
            }
            String base64 = new String(Base64.getEncoder().encode(outputStream.toByteArray()));
            String strInnerData = "<td align='center' style='width:240px;height:240px'>"+
                    "<img alt='Embedded Image' src='data:image/png;base64," + base64 + "'/></td>"; 
            strInnerData = strInnerData.replaceAll("'", "''"); // double the quotes to embed into SQL
            Env.setContext(sl.getCtx(), windowNo, "MyComplexVariable", strInnerData);
            return;
        }
    } // doHandleEvent

}

Of course this code must be added in a plugin with the corresponding OSGi definition.

Result shown to the User

Technical Info: IDEMPIERE-4798