Hi All,

I'm trying to use the provided PopupPanel.center() method to center a
popup panel on the screen. This works fine on Opera and Safari
centering the popup relative to the browser window. In Firefox though
it centers the popup relative to the entire page.

I've tried to implement my own center method as follows:

private void center() {
        popup.setPopupPositionAndShow(new PositionCallback() {

                public void setPosition(int offsetWidth, int offsetHeight)
                {
                        int[] winSize = windowSize();
                        int left = (winSize[0] - offsetWidth) >> 1;
                        int top = (winSize[1] - offsetHeight) >> 1;
                        popup.setPopupPosition(Window.getScrollLeft() + left,
Window.getScrollTop() + top);
                }

        });
}

public final native int[] windowSize() /*-{
        var myWidth = 0, myHeight = 0;
        if (typeof(window.innerWidth) == 'number') {
                //Non-IE
                myWidth = window.innerWidth;
                myHeight = window.innerHeight;
        } else if (document.documentElement &&
                (document.documentElement.clientWidth ||
document.documentElement.clientHeight)) {
                //IE 6+ in 'standards compliant mode'
                myWidth = document.documentElement.clientWidth;
                myHeight = document.documentElement.clientHeight;
        } else if (document.body && (document.body.clientWidth ||
document.body.clientHeight)) {
                //IE 4 compatible
                myWidth = document.body.clientWidth;
                myHeight = document.body.clientHeight;
        }
        return [myWidth, myHeight];
}-*/;

But this doesn't work as the windowSize() method returns 0 for reasons
I don't know.

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