I use endless scrolling in my rails 4 application.
The code automatically updates the url when I scroll a list:
var loading = false;
$(function() {
function nearBottomOfPage() {
return $(window).scrollTop() > $(document).height() - $(window).height() - 200;
}
$(window).scroll(function(){
if (loading || $(".infinite-scroll").length == 0) {
return;
}
if(nearBottomOfPage()) {
loading=true;
var qstring = parseInt(getParameterByName('page'));
if(isNaN(qstring)) {qstring = 1;}
qstring++
updateQueryString('page',qstring);
var url = $(".infinite-scroll").data("update-url")
var q_string = window.location.search
if(url.indexOf("?") != -1) {
q_string = q_string.replace("?","&")
}
url = url + q_string
$.ajax({
url: url,
type: 'get',
dataType: 'script',
success: function() {
$(window).sausage('draw');
loading=false;
}
});
}
});
$(window).sausage();
});
The updateQuerystring function replaces the state like so:
window.history.replaceState({turbolinks: true, position: Date.now()}, document.title, new_url);
This is a hack to try to get something that worked in rails 3 to work in rails 4...
It seems to work but it is not clean and has some issues.
The main issue is the fact that the scroll position is not reminded. When clicking the back button, I come back to the top of the page.
Is there a way to do this cleaner. Ideally, instead to do window.history.replaceState I'd like to do Turbolinks.replaceState(newUrl) or something like that.
But if I could find a way to remember the scroll position, It would be great already.
Thank you!
Triggering a Turbolinks visit manually
You can use Turbolinks.visit(path) to go to a URL through Turbolinks.
https://github.com/rails/turbolinks#triggering-a-turbolinks-visit-manually
Related
On IOS, when I close photoswipe to return to the page, it wont return to the scroll position I was at when I clicked the thumbnail.
Instead the page scrolls back to the # which was specified when I initially called the page.
For example if photoswipe is on www.somepage.html, and I navigate to the page using:
www.somepage.html#footer
and then scroll up and click a thumnail in #middle of page, on closing photoswipe, the page scrolls back down to the footer.
I've tried disabling history in the photswipe options, and i've also tried clearing the hash data from the url using:
//clear hash
//$(document).ready(function (e) {
// window.location.hash = '';
// window.history.pushState("", document.title, window.location.pathname);
//
//});
But none of it seems to work. If I navigate to the page without the # in the page, everthing is fine.
I'm guessing I may have to pass a variable in the url instead of the # and scroll to the div in question via javascript?
I already have the javascript in place to scroll, but I'm not sure how to read the variable from the url and then use it's value in Javascript.
If this is likely to be the best fix for the issue, could anyone give an example of the javascript code needed?
Here's my current scroll code:
$(function () {
$('a[href*=#]:not([href=#],[data-toggle],[data-target],[data-slide])').click(function () {
if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') || location.hostname == this.hostname) {
var target = $(this.hash);
target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
if (target.length) {
$('html,body').animate({
scrollTop: target.offset().top
}, 1000);
return false;
}
}
});
});
If anyone else has the same issue, I've managed to fix this by passing the div id to the page in the query string rather than using a #.
Here's the code:
$(window).ready(function () {
if (document.location.search.length) {
target = getUrlVars()["id"];
scrollToID('#' + target, 750);
} else {
return;
}
//target = $url().param('id');
//if (target == '') return;
});
function getUrlVars() {
var vars = [], hash;
var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
for (var i = 0; i < hashes.length; i++) {
hash = hashes[i].split('=');
vars.push(hash[0]);
vars[hash[0]] = hash[1];
}
return vars;
}
// scroll function
function scrollToID(id, speed){
var offSet = 100;
var targetOffset = $(id).offset().top - offSet;
var mainNav = $('#main-nav');
$('html,body').animate({scrollTop:targetOffset}, speed);
if (mainNav.hasClass("open")) {
mainNav.css("height", "1px").removeClass("in").addClass("collapse");
mainNav.removeClass("open");
}
}
if (typeof console === "undefined") {
console = {
log: function() { }
};
}
I'm using select2 for loading remote data. I declared the minimumInputLength to 3 letters, so after that it will start searching.
Whenever I hit the fourth letter while typing fast I get an Javascript exception saying :
Sorry. An error occured while communicating with the server. Please try again later.
How can I avoid this? I already changed the quietMillis (waitTimesMs) to lower or higher (does this even have something to do with it?).
Every help is appreciate.
My code is like:
$(function () {
$("#Search").select2({
minimumInputLength: 3,
ajax: {
url: site,
dataType: "json",
quietMillis: waitTimeMs,
data: function (params) {
var page = (params.page || 1) - 1;
return {
searchText: params.term,
pageCount: 10,
page: page
};
},
processResults: function (data) {
var select2Data = $.map(data.Items, function (obj) {
obj.id = obj.ID;
obj.text = obj.Name;
return obj;
});
return {
results: select2Data,
pagination: { more: (data.PageNo * 10) < data.TotalCount }
};
}
Finally it works!
select2 changed "quietMillis" to "delay" so I could change quietMillis as big as I wanted and nothing changed at all...
I am using Primefaces 3.2 with jsf 2 and glassfish 3.1.2.
I have a p:dataTable of users containing avatars of the user. Whenever the user moves the mouse over the avatar a p:overlayPanel appears with more information (lazy loaded) on the user, and disappears when the user moves the cursor away - like this:
<p:overlayPanel for="avatar" dynamic="true" showEvent="mouseover" hideEvent="mouseout" ...>
This works very well - as long as the user is "slowhanded". Whenever an user moves the cursor fast above many avatars many of the overlayPanels stay visible.
For example when the user has the cursor over the position where user avatars are displayed and uses the scroll wheel of his mouse to scroll the usertable down or up.
I believe that the overlaypanel starts to load the information dynamically (dynamic="true") from the server when showEvent="mouseover" is dispatched and displays the overlaypanel after the response from the server arrives.
This way it is not possible to detect whether the cursor is already away when the overlaypanel becomes visible - so the hideEvent="mouseout" is never dispatched.
Is there a way to make the primefaces overlaypanel appear directly on mousover, showing a loading gif and update the content into the overlaypanel when the response comes from the server.
Is this a good appraoch or does anyone know any other way to solve this nasty problem?
Thanks Pete
As my first answer is already very long and contains valid information, I decided to open a new answer presenting my final approach.
Im now using Primefaces inheritance pattern making the code alot cleaner. Also I noticed that replacing/overwriting the whole bindEvents function isnt necessary, as we can remove the old event handlers. Finally this code fixs the latest issue experienced: A hide event before ajax arrival.
PrimeFaces.widget.OverlayPanel = PrimeFaces.widget.OverlayPanel
.extend({
bindEvents : function() {
this._super();
var showEvent = this.cfg.showEvent + '.ui-overlay', hideEvent = this.cfg.hideEvent
+ '.ui-overlay';
$(document).off(showEvent + ' ' + hideEvent, this.targetId).on(
showEvent, this.targetId, this, function(e) {
var _self = e.data;
clearTimeout(_self.timer);
_self.timer = setTimeout(function() {
_self.hidden = false;
_self.show();
}, 300);
}).on(hideEvent, this.targetId, this, function(e) {
var _self = e.data;
clearTimeout(_self.timer);
_self.hidden = true;
_self.hide();
});
},
_show : function() {
if (!this.cfg.dynamic || !this.hidden) {
this._super();
}
}
});
Im sorry for the poor formatting: Eclipses fault ;)
Wow, finally after a long debuging session and testing various approaches i recognized that the problem isnt the ajax request but the event handlers itself:
.on(hideEvent, this.targetId, this, function(e) {
var _self = e.data;
if(_self.isVisible()) {
_self.hide();
}
});
As you can see, the widget is just hidden if its visible before. If your moving your mouse out too fast, now two things can happen:
The widget isnt visible at all
The animation is still going on
In this case the event is discarded and the panel stays visible. As animations are queued, one simply has to remove the if statement to fix the issue. I did this by replacing the whole bindEvents method:
PrimeFaces.widget.OverlayPanel.prototype.bindEvents = function() {
//mark target and descandants of target as a trigger for a primefaces overlay
this.target.data('primefaces-overlay-target', this.id).find('*').data('primefaces-overlay-target', this.id);
//show and hide events for target
if(this.cfg.showEvent == this.cfg.hideEvent) {
var event = this.cfg.showEvent;
$(document).off(event, this.targetId).on(event, this.targetId, this, function(e) {
e.data.toggle();
});
}
else {
var showEvent = this.cfg.showEvent + '.ui-overlay',
hideEvent = this.cfg.hideEvent + '.ui-overlay';
$(document).off(showEvent + ' ' + hideEvent, this.targetId).on(showEvent, this.targetId, this, function(e) {
var _self = e.data;
if(!_self.isVisible()) {
_self.show();
}
})
.on(hideEvent, this.targetId, this, function(e) {
var _self = e.data;
_self.hide();
});
}
//enter key support for mousedown event
this.bindKeyEvents();
var _self = this;
//hide overlay when mousedown is at outside of overlay
$(document.body).bind('mousedown.ui-overlay', function (e) {
if(_self.jq.hasClass('ui-overlay-hidden')) {
return;
}
//do nothing on target mousedown
var target = $(e.target);
if(_self.target.is(target)||_self.target.has(target).length > 0) {
return;
}
//hide overlay if mousedown is on outside
var offset = _self.jq.offset();
if(e.pageX < offset.left ||
e.pageX > offset.left + _self.jq.outerWidth() ||
e.pageY < offset.top ||
e.pageY > offset.top + _self.jq.outerHeight()) {
_self.hide();
}
});
//Hide overlay on resize
var resizeNS = 'resize.' + this.id;
$(window).unbind(resizeNS).bind(resizeNS, function() {
if(_self.jq.hasClass('ui-overlay-visible')) {
_self.hide();
}
});
};
Execute this code on load and the issue should be gone.
As your replacing the js code nevertheless, you can use this oppurtunity to implement quite a nice feature. By using timeouts in the event handlers one can easily implement a little delay not just improving usability (no more thousands of popups appear) but also reducing network traffic:
$(document).off(showEvent + ' ' + hideEvent, this.targetId).on(showEvent, this.targetId, this, function(e) {
var _self = e.data;
_self.timer = setTimeout( function(){
if(!_self.isVisible()) {
_self.show();
}
}, 300);
})
.on(hideEvent, this.targetId, this, function(e) {
var _self = e.data;
clearTimeout(_self.timer);
_self.hide();
});
Ofcourse you can use a global variable to control the delay time. If you want a more flexible approach youll have to overwrite the encodeScript method in the OverlayPanelRender to transmit an additional property. You could access it then with _self.cfg.delay. Notice though that youll have to replace the component model OverlayPanel too providing it with an extra attribute.
At the same time I thank you for this brilliant solution I take the opportunity to update it for Primefaces 5.2. In our application the code broke after that upgrade.
Follows the updated code for Primefaces 5.2:
PrimeFaces.widget.OverlayPanel.prototype.bindTargetEvents = function() {
var $this = this;
//mark target and descandants of target as a trigger for a primefaces overlay
this.target.data('primefaces-overlay-target', this.id).find('*').data('primefaces-overlay-target', this.id);
//show and hide events for target
if(this.cfg.showEvent === this.cfg.hideEvent) {
var event = this.cfg.showEvent;
this.target.on(event, function(e) {
$this.toggle();
});
}
else {
var showEvent = this.cfg.showEvent + '.ui-overlaypanel',
hideEvent = this.cfg.hideEvent + '.ui-overlaypanel';
this.target
.off(showEvent + ' ' + hideEvent)
.on(showEvent, function(e) {
clearTimeout($this.timer);
$this.timer = setTimeout(function() {
$('.ui-overlaypanel').hide();
$this.hidden = false;
$this.show();
}, 500);
})
.on(hideEvent, function(e) {
clearTimeout($this.timer);
$this.timer = setTimeout(function() {
// don't hide if hovering overlay
if(! $this.jq.is(":hover")) {
$this.hide();
}
}, 100);
});
}
$this.target.off('keydown.ui-overlaypanel keyup.ui-overlaypanel').on('keydown.ui-overlaypanel', function(e) {
var keyCode = $.ui.keyCode, key = e.which;
if(key === keyCode.ENTER||key === keyCode.NUMPAD_ENTER) {
e.preventDefault();
}
})
.on('keyup.ui-overlaypanel', function(e) {
var keyCode = $.ui.keyCode, key = e.which;
if(key === keyCode.ENTER||key === keyCode.NUMPAD_ENTER) {
$this.toggle();
e.preventDefault();
}
});
};
I also added an extra feature which allows the user to move the mouse over the overlay without hiding it. It should hide when you move the mouse out of it then which I accomplished through:
<p:overlayPanel .... onShow="onShowOverlayPanel(this)" ...>
function onShowOverlayPanel(ovr) {
ovr.jq.on("mouseleave", function(e) {
ovr.jq.hide();
});
}
Hope you enjoy!
It's been a long time, but in case anyone bumps into this problem, a showDelay attribute was added to the overlayPanel to solve this problem starting from Primefaces 6.2. However, it is not in the official documentation for some reason.
Hi guys i have posted a similar post before, but that is for another, now i face a strange and odd issue with my Jquery code. Here i was calling a controller method using Jquery but it is calling twice , so that may cause two entries in my db. Here is what i have written in my JQuery
<script type="text/javascript">
$('#btnSubmit').click(function () {
var instructorUrl = '#Url.Action("ApplyToBecomeInstructor", "InstructorApplication")';
var currentUser = '#Model.CurrentUserId';
var user = [];
var educationList = [];
var experience = $('#Experience').val();
var isWilling = $('#WillingToTravel').is(":checked");
$('#editorRows .editorRow').each(function () {
var education = {
UniversityOrCollege: $(this).find('.university').val(),
AreaOfStudy: $(this).find('.area').val(),
Degree: $(this).find('.degree').val(),
YearReceived: $(this).find('.year').val()
}
educationList.push(education);
});
var applicationFromView = {
EducationalBackgrounds: educationList,
CurrentUserId: currentUser,
Experience: experience,
WillingToTravel: isWilling
}
$.ajax({
type: 'POST',
url: instructorUrl,
dataType: 'JSON',
async: false,
data: JSON.stringify(applicationFromView),
contentType: 'application/json; charset=utf-8',
success: function (data) {
return false;
},
error: function (data) {
alert(xhr.status);
alert(thrownError);
alert(xhr.responseText);
return false;
}
});
});
</script>
and my controller action looks like this
[HttpPost]
public ActionResult ApplyToBecomeInstructor(InstructorApplicationViewModel applicationFromView)
{
Student thisStudent = this.db.Students.Where(o => o.StudentID == applicationFromView.CurrentUserId).FirstOrDefault();
List<PaulSchool.Models.EducationalBackground> educationList = new List<EducationalBackground>();
foreach (var educate in applicationFromView.EducationalBackgrounds)
{
var education = new Models.EducationalBackground
{
YearReceived = educate.YearReceived,
Degree = educate.Degree,
AreaOfStudy = educate.AreaOfStudy,
UniversityOrCollege = educate.UniversityOrCollege
};
educationList.Add(education);
}
var instructorApplication = new InstructorApplication
{
BasicInfoGatheredFromProfile = thisStudent,
Experience = applicationFromView.Experience,
EducationalBackground = new List<Models.EducationalBackground>(),
WillingToTravel = applicationFromView.WillingToTravel
};
instructorApplication.EducationalBackground.AddRange(educationList);
this.db.InstructorApplication.Add(instructorApplication);
this.db.SaveChanges();
return this.Redirect("Index");
}
Error message showing is JSON Parsing error.. but it is confusing to me.
I really wondered why this is happening, can anybody please take a look and help me?
This is what your code does:
$('#btnSubmit').click(function () { // attach a click handler for the button.
...
...
// Look for elements inside the button...
UniversityOrCollege: $(this).find('.university').val(),
Change from click to submit:
$('#formId').submit(function (e) {
...
// Now "this" is the form - not the button.
// Look for elements inside the <form>
UniversityOrCollege: $(this).find('.university').val(),
// Prevent the default form submition
return false // Or: e.preventDefault();
Another tip: use jQuery serialize function.
$('#btnSubmit').click() will fire every time the button is pressed. Often users double click buttons even though it only needs a single click or if you don't give any indication that something is happening they get impatient and click it again. You need some way to determine if the request has been made. There's ways to do this client and server side. The easiest client side way is to disable the button to prevent multiple clicks:
$('#btnSubmit').click(function () {
// Disable the button so it can't be clicked twice accidentally
$('#btnSubmit').attr('disabled', 'disabled');
//...
$.ajax({
//...
complete: function() {
// Make sure we re-enable the button on success or failure so it can be used again
$('#btnSubmit').removeAttr('disabled');
}
});
});
Folks,
I'm using Jquery UI - Tab.
I've an edit screen where the main form and tabs have been shown below. Now when I navigate from one record to another the Ajax call goes to the server to fetch new main record.
Now I want to refresh the tab below, with new record id, as well so what I've done is the following:
var jsonTabMetaData = [{"HtmlName":"Notes","Text":"Notes","Url":"../Notes.rl?moduleName=glbModuleName&moduleRecordID=glbModuleRecordID&sessionID=glbSessionID&company=glbCompanyName","Selected":false,"ModuleName":null,"ModuleRecordID":0},{"HtmlName":"AddressTel","Text":"Address & Telephone","Url":"../PhysicalAddress.rl/QuickAddress?moduleName=glbModuleName&moduleRecordID=glbModuleRecordID&sessionID=glbSessionID&company=glbCompanyName","Selected":false,"ModuleName":null,"ModuleRecordID":0},{"HtmlName":"Sendout","Text":"Send outs","Url":"../Sendouts.rl/List?moduleName=glbModuleName&moduleRecordID=glbModuleRecordID","Selected":false,"ModuleName":null,"ModuleRecordID":0},
function fnReboundTabs() {
$('#tabs a').each(function (index) {
var newUrl = jsonTabMetaData[$(this).attr("data-index")].Url;
newUrl = newUrl.replace("glbModuleRecordID", glbModuleRecordID);
newUrl = newUrl.replace("glbModuleName", glbModuleName);
newUrl = newUrl.replace("glbSessionID", glbSessionID);
newUrl = newUrl.replace("glbCompanyName", glbCompanyName);
this.href = newUrl;
});
`
if (firstTimeReboundTabs) {
firstTimeReboundTabs = false;
$("#tabs").tabs({
select: function (event, ui) {
},
cache: true,
event: '<%= (UI.Web.Helper.SessionMaster.OpenTabOnMouseOver) ? "mouseover": "click" %>',
async: false,
ajaxOptions: {
cache: false,
success: function () { },
error: function (xhr, status, index, anchor) {
$(anchor.hash).html(
"Couldn't load this tab. Should you see this error again, please notify admin.");
}
}
});
}
`
Now the problem is this:
When I navigate, the value changes in the URL, but the tab click request is opening into the new screen.
I.e. It is not working as Ajax call.
The Main screen goes and the URL open as a new URL in the browser address bar.
If I'm following this correctly, you want to change the URL of a tab's content when recordId is changed, and reload that tab without reloading the entire page.
This is possible using two methods of your tabs object:
To change the url, use the .tabs("url", index, url) where:
index = the index of the tab you are updating
url = the string of the new URL
To reload the tab's content at any time use .tabs("load", index)
index = the index of the tab you are updating.
Using these together should do what you want. I.e. when you have a new recordId do:
mytabs.tabs("url", i, 'mypage?recordId' + newRecordId)
mytabs.tabs("load", i)
The documentation is here, under the 'methods' tab: jqueryui docs
This is what I've done now:
function fnReboundTabs() {
for (var idx = 0; idx < jsonTabMetaData.length; idx++) {
var newUrl = jsonTabMetaData[idx].Url;
newUrl = newUrl.replace("glbModuleRecordID", glbModuleRecordID);
newUrl = newUrl.replace("glbModuleName", glbModuleName);
newUrl = newUrl.replace("glbSessionID", glbSessionID);
newUrl = newUrl.replace("glbCompanyName", glbCompanyName);
$("#tabs").tabs("url", idx, newUrl)
}
if (isNaN($('#tabs').tabs().tabs('option', 'selected')))
{ }
else {
$("#tabs").tabs("load", $('#tabs').tabs().tabs('option', 'selected'))
}
}
This function will then be called by when the main record has been downloaded at client side - JSON/ AJAX based.