function AjaxIndicator(divId) {
this._divId = divId;
this._counter = 0;
this.enabled = true;
this.delayed = true;
}
AjaxIndicator.waiting = false;
AjaxIndicator.prototype.getDiv = function() {
return document.getElementById(this._divId);
};
AjaxIndicator.prototype.disableDelay = function() {
this.delayed = false;
};
AjaxIndicator.prototype.disableOnce = function() {
this.enabled = false;
};
AjaxIndicator.prototype.show = function() {
if (!this.enabled) {
this.enabled = true;
return;
}
this._counter++;
if (this._counter != 1) {
return;
}
AjaxIndicator.waiting = true;
var myDiv = this.getDiv();
if (myDiv) {
if (dojo.isIE == 6) {
window.onscroll = AjaxIndicator.positionMessage;
AjaxIndicator.positionMessage();
}
myDiv.style.display = 'block';
if (this.delayed) {
setTimeout(this.showIndicator, 500);
} else {
this.showIndicator();
}
}
this.delayed = true;
};
AjaxIndicator.prototype.showIndicator = function() {
if (ajaxIndicator._counter) {
var doc = document.documentElement;
var msgDiv = document.getElementById('ajaxIndicatorMessage');
msgDiv.style.top = (doc.clientHeight - msgDiv.clientHeight) / 2 + 'px';
msgDiv.style.left = (doc.clientWidth - msgDiv.clientWidth) / 2 + 'px';
document.getElementById('ajaxIndicator').style.visibility = 'visible';
}
};
AjaxIndicator.positionMessage = function() {
var doc = document.documentElement;
var myDiv = ajaxIndicator.getDiv();
myDiv.style.top = doc.scrollTop + 'px';
myDiv.style.left = doc.scrollLeft + 'px';
};
AjaxIndicator.prototype.hide = function() {
this._counter = this._counter ? this._counter - 1 : 0;
if (this._counter > 0) {
return;
}
AjaxIndicator.waiting = false;
var myDiv = this.getDiv();
if (myDiv) {
window.onscroll = null;
myDiv.style.display = 'none';
document.getElementById('ajaxIndicator').style.visibility = 'hidden';
}
};

var ajaxIndicator = new AjaxIndicator('ajaxIndicatorContainer');

window.wicketGlobalPreCallHandler = function() {
ajaxIndicator.show();
};

window.wicketGlobalPostCallHandler = function() {
ajaxIndicator.hide();
DojoUtils.dijitCleanup();
};