Is there a way to implement keyboard navigation (up, down arrows) in a tablesorter table within a fixed height iframe or div?
Thanks in advance.
This code adds very basic functionality. Adding a tabindex attribute allows the rows to become focusable (demo):
$(function () {
$('table').tablesorter({
theme : 'blue',
widgets : ['stickyHeaders', 'zebra'],
widgetOptions : {
stickyHeaders_attachTo : '.wrapper'
}
});
// make tr focusable
$('table tbody tr').attr('tabindex', 0);
// make arrows keys change row focus
$('body').on('keydown', function(e){
var $tr = $(':focus');
// only alter arrow key default movements when a row is focused
if ( $tr.length && $tr[0].nodeName === 'TR' ) {
if (e.which === 40) {
// prevent arrow causing a scroll
// arrow scrolls 1.5 lines, so it doesn't sync up
e.preventDefault();
$tr.next().focus();
} else if (e.which === 38) {
e.preventDefault();
$tr.prev().focus();
}
}
});
});
I understand that mobile safari has a lot of bugs around fixed elements, but for the most part I've managed to get my layout working correctly until I added a much needed text input to the fixed navigation at the bottom. Now when the user focuses on the text input element and the virtual keyboard appears, my navigation, which is otherwise always fixed at the bottom of the page, jumps up to a really strange spot in the middle of the page.
I'd add some of my code to this post, but I wouldn't be sure where to start. That navigation is fixed at the bottom and positioned to the left and bottom 0, and 100% width. From there, I don't know what's going on, I can only assume it's a mobile safari bug.
It also appears to lose it's position fixed and become relative, only while the text input element is focused on and the virtual keyboard is open.
http://dansajin.com/2012/12/07/fix-position-fixed/ this is one of the solutions proposed. Seems worth a shot.
In short: set fixed elements to position:absolute when any input is focused and reset them when that element is blurred
.header {
position: fixed;
}
.footer {
position: fixed;
}
.fixfixed .header,
.fixfixed .footer {
position: absolute;
}
and
if ('ontouchstart' in window) {
/* cache dom references */
var $body = $('body');
/* bind events */
$(document)
.on('focus', 'input', function() {
$body.addClass('fixfixed');
})
.on('blur', 'input', function() {
$body.removeClass('fixfixed');
});
}
The solutions on the top are some ways to go and fix the problem, but I think adding extra css class or using moderniz we are complicating things.If you want a more simple solution, here is a non-modernizr non-extra-css but pure jquery solution and work on every device and browsers I use this fix on all my projects
if ('ontouchstart' in window) {
$(document).on('focus', 'textarea,input,select', function() {
$('.navbar.navbar-fixed-top').css('position', 'absolute');
}).on('blur', 'textarea,input,select', function() {
$('.navbar.navbar-fixed-top').css('position', '');
});
}
I had a similar problem, but I found a workaround by adding the following css class to the body element on input focus and then removing it again on unfocus:
.u-oh {
overflow: hidden;
height: 100%;
width: 100%;
position: fixed;
}
Taking from what sylowgreen did, the key is to fix the body on entering the input. Thus:
$("#myInput").on("focus", function () {
$("body").css("position", "fixed");
});
$("#myInput").on("blur", function () {
$("body").css("position", "static");
});
Add javascript like this:
$(function() {
var $body;
if ('ontouchstart' in window) {
$body = $("body");
document.addEventListener('focusin', function() {
return $body.addClass("fixfixed");
});
return document.addEventListener('focusout', function() {
$body.removeClass("fixfixed");
return setTimeout(function() {
return $(window).scrollLeft(0);
}, 20);
});
}
});
and add class like this:
.fixfixed header{
position: absolute;
}
you can reference this article: http://dansajin.com/2012/12/07/fix-position-fixed/
I really like the solution above. I packaged it up into a little jQuery plugin so I could:
Set which parent gets the class
Set which elements this applies to (don't forget "textarea" and "select").
Set what the parent class name is
Allow it to be chained
Allow it to be used multiple times
Code example:
$.fn.mobileFix = function (options) {
var $parent = $(this),
$fixedElements = $(options.fixedElements);
$(document)
.on('focus', options.inputElements, function(e) {
$parent.addClass(options.addClass);
})
.on('blur', options.inputElements, function(e) {
$parent.removeClass(options.addClass);
// Fix for some scenarios where you need to start scrolling
setTimeout(function() {
$(document).scrollTop($(document).scrollTop())
}, 1);
});
return this; // Allowing chaining
};
// Only on touch devices
if (Modernizr.touch) {
$("body").mobileFix({ // Pass parent to apply to
inputElements: "input,textarea,select", // Pass activation child elements
addClass: "fixfixed" // Pass class name
});
}
I use this jQuery script:
var focus = 0;
var yourInput = $(".yourInputClass");
yourInput.focusin(function(){
if(!focus) {
yourInput.blur();
$("html, body").scrollTop($(document).height());
focus = 1;
}
if(focus) {
yourInput.focus();
focus = 0;
}
});
Works perfectly for me.
The focusin and focusout events seem to be better suited to this problem than the focus and blur events since the former bubble up to the root element. See this answer on SO.
Personally I use AngularJS, so I implemented it like this:
$window.document.body.addEventListener('focusin', function(event) {
var element = event.target;
var tagName = element.tagName.toLowerCase();
if(!$rootScope.inputOverlay && (tagName === 'input' || tagName === 'textarea' || tagName === 'select')) {
$rootScope.$apply(function() {
$rootScope.inputOverlay = true;
});
}
});
$window.document.body.addEventListener('focusout', function() {
if($rootScope.inputOverlay) {
$rootScope.$apply(function() {
$rootScope.inputOverlay = false;
});
}
});
Note: I am conditionally running this script if this is mobile Safari.
I put an ng-class attribute on my navbar:
<div class="navbar navbar-default navbar-fixed-top" ng-class="{'navbar-absolute': inputOverlay}">
using the following CSS:
.navbar-absolute {
position: absolute !important;
}
You can read more about focusin here and focusout here.
Test this one. It works. I just test it.
$(document).on('focus','input', function() {
setTimeout(function() {
$('#footer1').css('position', 'absolute');
$('#header1').css('position', 'absolute');
}, 0);
});
$(document).on('blur','input', function() {
setTimeout(function() {
$('#footer1').css('position', 'fixed');
$('#header1').css('position', 'fixed');
}, 800);
});
None of these solutions worked for me because my DOM is complicated and I have dynamic infinite scroll pages, so I had to create my own.
Background: I am using a fixed header and an element further down that sticks below it once the user scrolls that far down. This element has a search input field. In addition, I have dynamic pages added during forward and backwards scroll.
Problem: In iOS, anytime the user clicked on the input in the fixed element, the browser would scroll all the way to the top of the page. This not only caused undesired behavior, it also triggered my dynamic page add at the top of the page.
Expected Solution: No scroll in iOS (none at all) when the user clicks on the input in the sticky element.
Solution:
/*Returns a function, that, as long as it continues to be invoked, will not
be triggered. The function will be called after it stops being called for
N milliseconds. If `immediate` is passed, trigger the function on the
leading edge, instead of the trailing.*/
function debounce(func, wait, immediate) {
var timeout;
return function () {
var context = this, args = arguments;
var later = function () {
timeout = null;
if (!immediate) func.apply(context, args);
};
var callNow = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (callNow) func.apply(context, args);
};
};
function is_iOS() {
var iDevices = [
'iPad Simulator',
'iPhone Simulator',
'iPod Simulator',
'iPad',
'iPhone',
'iPod'
];
while (iDevices.length) {
if (navigator.platform === iDevices.pop()) { return true; }
}
return false;
}
$(document).on("scrollstop", debounce(function () {
//console.log("Stopped scrolling!");
if (is_iOS()) {
var yScrollPos = $(document).scrollTop();
if (yScrollPos > 200) { //200 here to offset my fixed header (50px) and top banner (150px)
$('#searchBarDiv').css('position', 'absolute');
$('#searchBarDiv').css('top', yScrollPos + 50 + 'px'); //50 for fixed header
}
else {
$('#searchBarDiv').css('position', 'inherit');
}
}
},250,true));
$(document).on("scrollstart", debounce(function () {
//console.log("Started scrolling!");
if (is_iOS()) {
var yScrollPos = $(document).scrollTop();
if (yScrollPos > 200) { //200 here to offset my fixed header (50px) and top banner (150px)
$('#searchBarDiv').css('position', 'fixed');
$('#searchBarDiv').css('width', '100%');
$('#searchBarDiv').css('top', '50px'); //50 for fixed header
}
}
},250,true));
Requirements: JQuery mobile is required for the startsroll and stopscroll functions to work.
Debounce is included to smooth out any lag created by the sticky element.
Tested in iOS10.
I wasn't having any luck with the solution proposed by Dan Sajin. Perhaps the bug has changed since he wrote that blog post, but on iOS 7.1, the bug will always surface when the position is changed back to fixed after the input is blurred, even if you delay until the software keyboard is hidden completely. The solution I came to involves waiting for a touchstart event rather than the blur event since the fixed element always snaps back into proper position when the page is scrolled.
if (Modernizr.touch) {
var $el, focused;
$el = $('body');
focused = false;
$(document).on('focus', 'input, textarea, select', function() {
focused = true;
$el.addClass('u-fixedFix');
}).on('touchstart', 'input, textarea, select', function() {
// always execute this function after the `focus` handler:
setTimeout(function() {
if (focused) {
return $el.removeClass('u-fixedFix');
}
}, 1);
});
}
HTH
I am currently having issues making iPad work with a :hover event. To clear up what i mean i have uploaded part of the website at http://playing.everythingcreative.co.uk and I have 3 images, that when hovered over a div disappears to show text underneath but this does not work on the iPad at all. I tried:
ontouchstart="touchStart(event);"
But i don't know enough on how it works to use it right.
Any help would be great.
I figured it out anyway using the example on iOS automatic hover fix? and changing:
if(navigator.platform == "iPad") {
to:
if ("ontouchstart" in document.documentElement) {
The final code:
$(document).ready(function() {
if ("ontouchstart" in document.documentElement) {
$("div").each(function() { // have to use an `each` here - either a jQuery `each` or a `for(...)` loop
var onClick; // this will be a function
var firstClick = function() {
onClick = secondClick;
return false;
};
var secondClick = function() {
onClick = firstClick;
return true;
};
onClick = firstClick;
$(this).click(function() {
return onClick();
});
});
}
});
Structure of jQueryUI's Accordion is something like this,
<h2>title</h2><div>content</div>
for each item. What I am going to do is create accordion inside of my backbone view through looping, but backbone create div tag for each item so I have html code like this
<div><h2>title</h2><div>content</div></div>
This makes jQuery Accordion control does not work correctly, collapse and expand is not working.
I think this can be solved if I can set nothing on el or tagname, but I cannot find out.
Is there any way to solve this problem?
I think you'd be better off leaving the accordion to one view and then have a separate view inside each panel. After all, the <h2>s are controls for the accordion as-a-whole rather than for a specific panel.
You'd have some per-panel views like this:
var P = Backbone.View.extend({
render: function() {
// Add the panel's content to this.$el (which is a <div> by default).
return this;
}
});
And then an accordion view like this:
var A = Backbone.View.extend({
render: function() {
var panels = [ ... ];
for(var p, i = 0; i < panels.length; ++i) {
p = new P({ ... });
this.$el.append('<h3><a>' + panels[i] + '</a></h3>');
this.$el.append(p.render().el);
}
// The accordion wants to know the sizes of things so
// we let the DOM sort itself out before binding the
// accordion.
var _this = this;
setTimeout(function() { _this.$el.accordion() }, 0);
return this;
}
});
Then you can simply $('#something').append((new A).render().el) and it all works out nicely while leaving everything where it should be.
You could also add a title method to the P views and then A could ask the panel what its name/title/header should be so that all the per-panel information is nicely contained in the per-panel view.
Demo: http://jsfiddle.net/ambiguous/Y49W8/
I won't to give a different hover colors to my jquery dialog buttons. For example when the user will hover over the "Ok" button the hover color will be blue and when he hovers over the cancel button the hover color will be gray.
Can anyone tell me how can I do it?
$(document).ready(function() {
$(":button").hover(function() {
$(this).css('background', 'url(' / images / buttons / green_26.png ')');
});
$(":button").mouseout(function() {
$(this).css('background', 'url(' / images / buttons / grey_26.png ')');
});
});
Basic theory: use one or more css classes which you add to your html object dynamically on mouse-in, and remove on mouse-out. You can take a look at the jQuery hover event and some examples of how to work with attributes in jQuery to get an idea of how to do it.
In detail: There are two different ways to approach this that I can immediately think of, depending on where you want to make the ok/cancel button "decision".
Add two different classes to your stylesheet with different background colors, and add one class to each element. That means you'll need two very similar jQuery methods, but most of it can be factored out to avoid duplication.
Hard-code different class names on your buttons (or use button id's or someting) and make two different css selectors, for example something like .ok .hover { your style here } and .cancel .hover { your style here }. Then you just need one jQuery call, that hits both buttons with the jQuery selector and adds/removes the hover class.
You can use this function:
function changeButtonClass(buttonIndex, classes) {
var selector = 'div[class^=ui-dialog-buttonpane] > button';
var buttonConcerned;
if (buttonIndex >= 0) {
buttonIndex++;
buttonConcerned = $(selector + ':nth-child(' + buttonIndex + ')');
} else {
return;
}
buttonConcerned.removeClass();
buttonConcerned.addClass(classes[0]);
buttonConcerned.
hover(
function() {
$(this)
.removeClass()
.addClass(
classes[1])
},
function() {
$(this)
.removeClass()
.addClass(
classes[0])
})
.focus(
function() {
$(this)
.removeClass()
.addClass(
classes[2])
})
.blur(
function() {
$(this)
.removeClass()
.addClass(
classes[0])
});
}
And then call your function with this (for a 3 buttons dialog):
var classes = new Array('myClass', 'myClass2', 'myClass2');
changeButtonClass(0, classes);
var classes = new Array('myClass3', 'myClass4', 'myClass4');
changeButtonClass(1, classes);
changeButtonClass(2, classes);
And so it works ;)