the changes are not visible in window for vaadin 7 - multithreading

Question

I have a window in vaadin 7, and I would like to show changes as there are made, because I have longer task working its think. I stumble upon this site but I have to move the window to see the changes. In the window that I have, I call next class with :
new PushyUI();
the class called:
public class PushyUI extends UI {
Chart chart = new Chart(ChartType.AREASPLINE);
DataSeries series = new DataSeries();
PushyUI() {
chart.setSizeFull();
setContent(chart);
// Prepare the data display
Configuration conf = chart.getConfiguration();
conf.setTitle("Hot New Data");
conf.setSeries(series);
// Start the data feed thread
new FeederThread().start();
}
class FeederThread extends Thread {
int count = 0;
#Override
public void run() {
try {
// Update the data for a while
while (count < 6) {
Thread.sleep(1000);
getUI().access(new Runnable() {
#Override
public void run() {
double y = Math.random();
series.add(new DataSeriesItem(count++, y),
true, count > 10);
}
});
}
// Inform that we have stopped running
getUI().access(new Runnable() {
#Override
public void run() {
setContent(new Label("Done!"));
}
});
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
How could I see the changes without have to moving the window around ? Thanks

Answer 1

I found the solution here . I manage to modified so it works for me.
layout = new HorizontalLayout();
layout.setSpacing(true);
layout.setSizeFull();
// Add a normal progress bar
sample = new ProgressBar();
layout.addComponent(sample);
layout.setComponentAlignment(sample, Alignment.MIDDLE_CENTER);
startButton = new Button("Start", new Button.ClickListener() {
#Override
public void buttonClick(final ClickEvent event) {
sample.setValue(0f);
sample.setVisible(true);
startButton.setEnabled(false);
UI.getCurrent().setPollInterval(500);
launchProgressUpdater(UI.getCurrent(), 10);
}
});
startButton.setStyleName(ValoTheme.BUTTON_SMALL);
layout.addComponent(startButton);
layout.setComponentAlignment(startButton, Alignment.MIDDLE_CENTER);
...
private void launchProgressUpdater(UI ui, int maxProgress) {
new Thread(() -> {
for (int progress = 1; progress <= maxProgress; progress++) {
try {
Thread.sleep(1000);
} catch (final InterruptedException e) {
throw new RuntimeException("Unexpected interruption", e);
}
updateProgressBar(ui, progress, maxProgress);
}
}).start();
}
private void updateProgressBar(UI ui, int progress, int maxProgress) {
ui.access(() -> {
final float newValue;
if (progress == maxProgress) {
ui.setPollInterval(-1);
startButton.setEnabled(true);
newValue = 0f;
sample.setVisible(!sample.isIndeterminate());
} else {
newValue = (float) progress / maxProgress;
}
sample.setValue(newValue);
Notification.show("Value changed:", Float.toString(newValue), Notification.Type.TRAY_NOTIFICATION);
});
}