Foundation 6 Orbit: Change Slide programatically - javascript

On Foundation 6.
I have an orbit slider that, besides the default behaviour, it also needs to be able to change the slide when an outside button is clicked.
Is there a way to make this work?
I've tried this code:
jQuery('#theslider').foundation('changeSlide', true, slide_id);
//slide_id is the jQuery object's slide ex: jQuery(#slideid);
It kind of works, but it works erratically.
It sometimes works fine for a while, but a some point then the slide goes fast and disappears from the screen, or simply freezes.
I can't seem to find a pattern on what's going on.
I'm not an expert on javascript so I might be missing something really obvious.

My solution as follow:
$('.orbit-external-control').on('click', function () {
var activeIdx = ~~$('.orbit .orbit-bullets .is-active').data('slide')
var changeIdx = ~~$(this).data('slide')
var isLTR = (changeIdx > activeIdx) ? true : false
if (activeIdx === changeIdx)
return
var chosenSlide = $('.orbit .orbit-slide').filter(function (index) {
return index === changeIdx
})
$('.orbit').foundation('changeSlide', isLTR, chosenSlide, changeIdx)
})

Related

How can I trigger jquery event at random time intervals?

I created a header using jquery.flip.js, found at https://github.com/nnattawat/flip. The plugin allows several ways to trigger the flip, the two relevant ones are 'click' and 'hover'. I was hoping to have the div's flip at random intervals automatically. I did find a similar question on stackoverflow that Heretic Monkey suggested using a recursive approach (Trigger mouse click and random intervals)...
var clickHand = function() {
$("[id^='hand_'].handIcon").trigger('click');
setTimeout(clickHand, (Math.random() * 3000) + 32000);
}
clickHand();
EDIT: sorry for not being clear. In the jquery code, the following method (?) handles the flip on click, however what I would like to do is have the divs flip automatically (if possible) without a hover or click to trigger. I tried using a setTimeout inside attachEvents, but it seemed to cause an issue with the styling.
attachEvents: function() {
var self = this;
if (self.setting.trigger === "click") {
self.element.on($.fn.tap ? "tap.flip" : "click.flip", $.proxy(self.clickHandler, self));
} else if (self.setting.trigger === "hover") {
self.element.on('mouseenter.flip', $.proxy(self.hoverHandler, self));
self.element.on('mouseleave.flip', $.proxy(self.unflip, self));
}
},
I am pretty new to javascript and am having a difficult time with this and any help would be appreciated.
I created a simple codepen, demonstrating the 3D flip, https://codepen.io/coeyflyer/pen/eYZGymG.
Thank you for any suggestions,
C

Menu items - onclick FadeInDown and FadeOutUp

I have a menu composed of three options.
Clicking on one causes a container div to "FadeInDown".
Then, its contents "FadeIn".
Clicking on another menu item or anywhere else on the page causes the
contents to "FadeOut" then container div to "FadeOutUp".
Here is the fiddle that I have been testing jsfiddle
$(document).ready(function() {
$('.container').each(function() {
animationHover(this,'.fadeInDown');
});
});
I'm not very familiar with jQuery and have been trying to use animate-css to get me along. Thanks for any help and tips in advance and welcome coding criticism :)
My answer is mainly based on JQuery and its animate function (http://api.jquery.com/animate/) . Here is the fiddle :
http://jsfiddle.net/awmat/7/
I use JavaScript objects like fadeInDown to animate the container.
var fadeInDown = {
opacity:1,
top: "50px"
};
And i use the complete callback function of animate to make the content appear after the container.
To manage several div (one for each menu item), I use id as selectors, but since the "click and display" function remains the same, I used a "builder" : (this uses a closure, so if you're not familiar with JavaScript, you may have to read several times to understand what is going on)
var menuClickCallbackBuilder = function(menuItem){
var container = $('#container' + menuItem);
var content = container.find('.content');
var showContent = function(){
content.animate({opacity:1},{duration:1000});
};
return function() {
var activeContainer = $('.active');
var hideContainer = function(){
activeContainer.animate(fadeOutUp,1000);
};
activeContainer.find('.content').animate({opacity:0},{duration: 1000, complete : hideContainer});
activeContainer.removeClass("active");
if(activeContainer[0] != container[0])
{
var timeout = activeContainer[0] ? 2000 : 0 ;
setTimeout(function(){
container.animate(fadeInDown,{duration : 1000, complete :showContent});
},timeout);
container.addClass("active");
}
}
};
This way, when you add the add the click callbacks, you can just do :
$(document).ready(function(){
// note that menuClickCallbackBuilder(1) returns a function
// again if you're not familiar with JS, you may have to re-read menuClickCallbackBuilder
$('#menuLink1').on('click', menuClickCallbackBuilder(1));
$('#menuLink2').on('click', menuClickCallbackBuilder(2));
$('#menuLink3').on('click', menuClickCallbackBuilder(3));
});
Some improvements you can bring to this :
Factor the durations into a variable (e.g animationDurationInSeconds) so that if you want to change the speed of the animation, you only have 1 thing to change. (#Huangism: and right after you did that, make animation faster so that it gets more dynamic)
(From #Huangism) : stop it from going crazy when people cicks on the menu 10 times really fast
Actually, I think you don't need 3 different containers, you could do it with just one container (though I don't know if it would be considered an improvement)
There is probably a way to use CSS classes instead of fadeInDown and fadeOutUp JS objects. That would be cleaner, I think you should keep styles in CSS as much as you can.
There is no need for different IDs for menu items, you could do the exact same thing with a loop.
Whatever your imagination wants to add

Hammer.js Carousel Start Pane

Heyho,
I´am working on a project in my university and I´d like to use "Hammer.js".
I´ve downloaded the Carousel-Example and it works perfectly for me.
But I would like to start a the middle pane of my code and it´s not so simple I think.
It´s something like this:
http://img203.imageshack.us/img203/6326/schemeas.jpg
so Hammer.js starts always with the green screen. But I like to start with the yellow one.
I´ve added one swipe right to the init function but it looks horrible when the page is loading and could not be the goal ^^
I hope anyone of you have an idea how to solve my problem.
Try calling
carousel.showPane(1);
That will display the second pane instantly. You will want to put this near the bottom, right after where it says.
carousel.init();
If you're feeling adventurous you could try and make it automatically start with that pane as there's a variable inside the Carousel function called current_pane which is set to a default of 0 (the first pane). Altering this may work too but might require more code somewhere else. Experiment!
edit
NULL is right, it does animate it. Here's a more in depth method to set it without animation:
I found that the method responsible for changing which pane is showing was the setContainerOffset mthod which could be passed a variable to animate it. I previously told you to use showPane(2) but that then called
setContainerOffset(offset, true)
which caused the animation occur. What you should do instead is make a slightly different version of showPane...
this.setPane = function( index ) {
// between the bounds
index = Math.max(0, Math.min(index, pane_count-1));
current_pane = index;
var offset = -((100/pane_count)*current_pane);
setContainerOffset(offset, false);
};
You'll find it's almost identical to showPane except for the name and the fact that it calls setContainerOffset with animation: false. This will immediately show the pane of your choice and can be called using
carousel.setPane(index);
What I've done is added this to the init function so that it looks like this:
this.init = function() {
setPaneDimensions();
var c = this;
$(window).on("load resize orientationchange", function() {
setPaneDimensions();
c.setPane(current_pane);
//updateOffset();
})
};
Now you can change
var current_pane = 0;
to whatever you want and the carousel will always start with that pane when it's initialised! simple!

iscroll scrollToElement not updating currPage variable

UPDATE:
I was able to get my scroller working as desired but I feel like I have hacked around the actual issue and would love it if anyone has a more solid answer, I've updated and noted in the snippets below the new jQuery I'm using.
I'm using iScroll-4 (http://cubiq.org/iscroll-4) for an iPad/Android web app, everything's working perfectly with the swipes and scrolling but I have a table of contents at the beginning of the app that allows users to jump to specific areas of the scroller --
I'm using the iScroll function scrollToElement(element, duration) in order to jump to the different areas. Also using scrollToPage(page, duration) to allow the user to manually navigate forward and backward one page at a time.
While watching the console logs the currPageX variable updates when I navigate with the scrollToPage function and when I swipe, but when using the scrollToElement the currPageX variable does not update.
Therefore if I jump to an element and then navigate forward with scrollToPage('next', 0) it will go backwards and navigate me to the next page after the table of contents.
I have tried using the scroll.refresh() function after scrollToElement, before, putting the function inside a timeout, etc. and I can't figure out why the currPageX is not updating.
Here's a snippet of the jQuery code that I'm using the two different functions:
// TO NAVIGATE FORWARD AND BACKWARDS
$('span.control').on('click', function() {
var slideDir = $(this).attr('data-dir');
if (slideDir == 'prev') {
var tehPg = tehScroll.currPageX-1;
} else if (slideDir == 'next') {
var tehPg = tehScroll.currPageX+1;
}
tehScroll.scrollToPage(tehPg, 0);
return false;
});
// TO JUMP FROM CONTENTS
$('li[data-page="toc"] span').on('click', function() {
var toPage = $(this).attr('data-page');
tehScroll.scrollToElement('li[data-page="'+toPage+'"]', 800);
// ADDED THE FOLLOWING LINE TO MANUALLY SET currPageX after scrolling!
tehScroll.currPageX = $('#slides li[data-page="'+toPage+'"]').index();
return false;
});
Did you consider using jquery-mobile-iscrollview widget plug-in? - there is a function scrollToPage(pageX, pageY, time), works well for me...
best
M

javascript - bad algorithm firing concurrent loops

I created a relatively small dynamic banner rotation script with icons at the bottom for bringing a particular banner into focus. Firing a mouseenter over a banner pauses the show, but sometimes when I mouseout from my banner, the delay for certain banners gets shortened. I'd even understand if it just happened once, but the delay is then set for that shorter amount of time every time the banner comes back around in the rotation, and often the shortening happens in one other place in the list of banners, as well. Sometimes this can be corrected by an as yet undetermined set of actions. I'm starting to suspect that my logic is catching the loop in the middle somewhere and so the process branches out, runs two loops, which appear to speed up the calling of the showNextBanner function. Not sure how to solve this. I've put in tests to see if it's currently in play mode, to no avail.
I include what I think are the relevant parts of the code below.
var firstRun = true;
var play = true;
var current = 0;
var banners = $$( '.banner' );
banners.invoke( 'hide' );
var images = $$( '.image' );
var icons = $$( '.icon' );
//dynamically clones an initial icon to match the number of banners
initIcons();
banners.invoke( 'observe', 'mouseenter', function( field ) {
play = false;
});
banners.invoke( 'observe', 'mouseleave', function( field ) {
if( !play ) {
play = true;
showNextBanner().delay(3);
}
});
icons.invoke( 'observe', 'click', function( field ) {
play = false;
hideBanner( current );
showBanner( findObj( icons, field.findElement()));
});
showNextBanner().delay(3);
function hideBanner( which ) {
icons[ which ].src = blankIconSRC;
banners[ which ].hide();
}
function showBanner( which ) {
icons[ which ].src = selectedIconSRC;
banners[ which ].show();
current = which;
}
// loops the hiding and showing of icons
// (mouseenter sets play to false)
function showNextBanner() {
if( play ) {
if( !firstRun ) {
if( ++current == banners.length ) current = 0;
var previous = 0;
( current == 0 )? previous = banners.length - 1: previous = current - 1;
hideBanner( previous );
} else {
icons[0].src = selectedIconSRC;
firstRun = false;
}
showBanner( current );
showNextBanner.delay(3);
}
}
}());
After all that, the client wants a jQuery solution so he can have a slide-in effect not available via scriptaculous. So all that work is down the drain. The good news is that I can just use jCarousel, probably, and tweak the stylesheet. Thanks for the help!
I suspect what is happening is that you've got multiple .delay calls stacking up. So you've got one with less than 3 seconds remaining and showNextBanner is called again, setting another delay timer.
As I read the docs, it appears .delay is intended to put gaps in the jquery event pipeline, rather than actually delay function calls. You may benefit from switching to calling setTimeout instead of delay, so that you get a handle to the timeout, which you can then cancel before setting a new timeout (or cancel if play is set to false, then reset when play is true again) This is mentioned in the JQuery docs for .delay
My guess is that since you don't "cancel" the delay()'ed function, they hang around for too long, but they don't do anything when they fire, because play is false. But once play is true again, the all start having an effect again.
You can save the returned value for delay() and cancel the timer by using clearTimeout() with the value.
However, I'd also suggest that you use a single container for all the banners (and maybe put the the icons in there too), and set the mouseenter/mouseleave events on that, rather than on individual banners. Then there's just a single element that'll start/stop the banner rotation. If you also split everything up in specific functions that play and stop the rotation, and one to show a specific banner, you can possibly get a cleaner code structure.
Here's an example (it's just something I put together for fun rather than an edit of your code, so it's quite different. Sorry. But hopefully you can still use for something)

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