the pop up is a decorative pop up , the text in it is a label and close is a button. i have added the label and a button to horizontal panel and then added it to popup panel. i have tried with both invalidEntryVpanel.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE); invalidEntryVpanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
but still not able to align it in center please help. thanks in advance