Re: DWR 3.0.M1: setting img value to bufferedimage

Hi,

I recently switched to dwr3.0.m1 to use the features that have a built-in converted for BufferedImage, and I've been going by some of the examples in the .war file to return a BufferedImage and display it on the page. However, when I run the function that should display the image on the page, nothing seems to happen, although I have followed the example in the .war file almost exactly.

Here is the java method signature:

public BufferedImage uploadImage(String cameraName, int cameraFrame)

Here is the javascript source:

          function captureVigraImage() {
              var divElement = document.getElementById('imageCapture1');
              var cameraName = dwr.util.getValue('cameraName2');
              var frameNumber = dwr.util.getValue('channelNumber');
              VigraMain.uploadImage(cameraName, frameNumber, vigraImageCaptured());
              divElement.innerHTML = "image captured";
          }

          function vigraImageCaptured(data) {
              var divElement = document.getElementById('toReplace1');
              divElement.innerHTML = "callback function";
              dwr.util.setValue('imageCapture2', data);
          }

And finally, here is the relevant html source:

      <h2>Image capture form</h2>
      <form>
          <table>
              <tr>
                  <td>
                      Camera name:
                  </td>
                  <td>
                      <input id="cameraName2" type="text" />
                  </td>
              </tr>
              <tr>
                  <td>
                      Channel number:
                  </td>
                  <td>
                      <input id="channelNumber" type="text" />
                  </td>
              </tr>
          </table>
          <br />
          <input type="button" onClick="captureVigraImage()" value="Capture" />
      </form>
      <img id="imageCapture2" src="javascript:void(0);"/>

I know that the callback from the Java method is being called, as I see "callback function" displayed on the page from the innerHTML call. Is there something I am missing from the examples in the .war file? Is there anything else I need to do? I know the image isn't an empty image or a 0x0 image or anything like that. I must be missing something, but I cannot figure it out.

If anyone has any suggestions I will appreciate them greatly.

Thanks,
Dan


--
Dan Gresh
Lab Technician -- EP Controls
Laboratory for Laser Energetics
(585) 275-4819


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