/** loading constructor */
public VPopupView() {
super();
popup = new CustomPopup();
setStyleName(CLASSNAME);
popup.setStyleName(CLASSNAME + "-popup");
loading.setStyleName(CLASSNAME + "-loading");
setHTML("");
popup.setWidget(loading);
// When we click to open the popup...
addClickHandler(
new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
if (isEnabled()) {
preparePopup(popup);
showPopup(popup);
center();
fireEvent(new VisibilityChangeEvent(true));
}
}
});
// ..and when we close it
popup.addCloseHandler(
new CloseHandler<PopupPanel>() {
@Override
public void onClose(CloseEvent<PopupPanel> event) {
fireEvent(new VisibilityChangeEvent(false));
}
});
// TODO: Enable animations once GWT fix has been merged
popup.setAnimationEnabled(false);
popup.setAutoHideOnHistoryEventsEnabled(false);
}
/** For internal use only. May be removed or replaced in the future. */
public void center() {
int windowTop = RootPanel.get().getAbsoluteTop();
int windowLeft = RootPanel.get().getAbsoluteLeft();
int windowRight = windowLeft + RootPanel.get().getOffsetWidth();
int windowBottom = windowTop + RootPanel.get().getOffsetHeight();
int offsetWidth = popup.getOffsetWidth();
int offsetHeight = popup.getOffsetHeight();
int hostHorizontalCenter =
VPopupView.this.getAbsoluteLeft() + VPopupView.this.getOffsetWidth() / 2;
int hostVerticalCenter =
VPopupView.this.getAbsoluteTop() + VPopupView.this.getOffsetHeight() / 2;
int left = hostHorizontalCenter - offsetWidth / 2;
int top = hostVerticalCenter - offsetHeight / 2;
// Don't show the popup outside the screen.
if ((left + offsetWidth) > windowRight) {
left -= (left + offsetWidth) - windowRight;
}
if ((top + offsetHeight) > windowBottom) {
top -= (top + offsetHeight) - windowBottom;
}
if (left < 0) {
left = 0;
}
if (top < 0) {
top = 0;
}
popup.setPopupPosition(left, top);
}
/**
* Make sure that we remove the popup when the main widget is removed.
*
* @see com.google.gwt.user.client.ui.Widget#onUnload()
*/
@Override
protected void onDetach() {
popup.hide();
super.onDetach();
}
/**
* Determines the correct position for a popup and displays the popup at that position.
*
* <p>By default, the popup is shown centered relative to its host component, ensuring it is
* visible on the screen if possible.
*
* <p>Can be overridden to customize the popup position.
*
* @param popup
*/
public void showPopup(final CustomPopup popup) {
popup.setPopupPosition(0, 0);
}
/** For internal use only. May be removed or replaced in the future. */
public void preparePopup(final CustomPopup popup) {
popup.setVisible(true);
popup.setWidget(loading);
popup.show();
}