How to display upload state in a modal window

Vaadin 6 / 7 / 8 Framework UI
1

Hi,

Please see the attachment.

I modified the sample code com.vaadin.demo.sampler.features.upload.UploadWithProgressMonitoringExample.java and want to display upload state in a modal window. It looks like the window of the state information couldn’t pop up immediately after call getMainWindow().addWindow():

        upload.addListener(new Upload.StartedListener() {
            public void uploadStarted(StartedEvent event) {
                // Gets file properties
                String filename = event.getFilename();                
                if (filename == null || !filename.toLowerCase().endsWith("txt")) {
                	// interrupt upload process and display error message
                	upload.interruptUpload();
                	
                	WinUploadProgress winMessage = new WinUploadProgress(upload);
                	winMessage.setFileName(filename);
                	winMessage.setVisible(false);
                	winMessage.setState("Error");
	    			winMessage.setMessage("Please upload a text file (*.txt).");
	    			getMainWindow().addWindow(winMessage);
                } else {
                	winMessage = new WinUploadProgress(upload);
                	winMessage.setFileName(filename);
                	getMainWindow().addWindow(winMessage);
                }
            }
        });

The state window can only be displayed after the upload process is completed. So, no updated information can be seen during file uploading like the original vaadin demo.

I may wonder whether these updated information can be displayed in a modal window and how.
11349.java (5.58 KB)
11350.java (3.39 KB)