I have a button on a banner at the top of my page that launches several yui2 overlays on to the screen. Each overlay has a close button on it (which just changes the visibility to hidden so it can be reused). After the overlays are launched, there is also a button on the banner that appears will close all overlays if clicked.
This gives the use the option to close all or close each one individually. This is what i am stuck on:
If the user closes an individual overlay, after I close the overlay, I want to check if any other overlay is still open. If they happen to have closed all of them individually, then I need to revert the banner at the top and remove the "close all button".
I can search for all overlays by doing a:
var elements = YAHOO.util.Dom.getElementsByClassName('test');
I cant think of the logic I would need to do to go through that array each time they close an overlay to see all of them are set to visibility if hidden. If so, then execute a function. If there is still any overlays visible on the page, then do nothing.
This is the answer I came up with. Just not sure if it is correct.
var elements = document.getElementsByClassName('test');
var visiblecounter = 0;
for (var i = 0; i < elements.length; i++) {
if(elements[i].style.visibility!='hidden'){
alert("not hidden");
visiblecounter ++;
}
}
if(visiblecounter > 0){
alert("all overlays are closed individually. you can remove close all button");
}
You mention you are reusing those overlays so since you are pooling the overlays for reuse, I assume you have them in an array or something like that. Instead of checking the DOM (which is always expensive) to see if they are visible or not, loop through the array of overlays checking the visible attribute, like:
var anyVisible = false;
for (i = 0; i < myOverlays.length; i+=1) {
anyVisible |= myOverlays[i].cfg.getProperty("visible");
}
If any of them are visible, disable the button.
I am not sure I get the question, but I will try my best to help. Here are some things I would do. I also define an active class, so my HTML elements would be written as this:
<div class="john active"></div>
and in my css I would write.
.john {display: none};
.active {display: block};
So by default the object is hidden! But when you append the "active" class to it, it appears on the screen. So now we can do the following wizardry.
$(".hideButton").click(function() {
$(this).removeClass("active");
});
If I want to hide all the other objects, assuming that they have the same parent in the DOM
$(".hideOthersButton").click(function() {
$(this).siblings().removeClass("active");
});
if I want to hide all objects that share the same parent.
$(".hideEverything").click(function() {
$(".parent").children().removeClass("active");
});
I hope this helps! let me know if you need more help. The solution uses Jquery but you can repurpose the logic for anything else.
Related
So i'm wondering how you can make a div apear at a certain point of the page and stay in the exact same spot untill you reach a specific point of the page
kinda like they have on http://www.squarespace.com where you see a imac screen which stays on the screen until you reach a specific point
can this be done without using js
either way can someone let me know how?
I'm going to assume you mean making a div show up when the user has scrolled to a certain point in the page and then disappear when they scroll to another point.
This isn't technically possible with CSS. There might be a way to make it look like this with other elements covering it up, but I'll focus on doing it with JS for now.
Essentially, you want to
// set up limits for show/hide
var SHOW_Y = 100,
HIDE_Y = 800;
// function to be called every time
// the page is scrolled
function scrolled() {
if(window.scrollTop < SHOW_Y) {
hide(this);
} else if(window.scrollTop < HIDE_Y) {
show(this);
} else {
hide(this);
}
}
// helper function which hides an element
function hide(element) {
element.style.display = 'none';
}
// helper function which shows an element
function show(element) {
element.style.display = 'block';
}
window.addEventListener('load', function() {
var element = document.getElementById('your-element');
window.addEventListener('scroll', scrolled.bind(element));
});
I would probably do this using CSS classes rather than display properties, in order to control the way that the element disappears and reappears, but this should give you some idea.
You could also use a script like Skrollr or ScrollMagic.
I am creating a single page layout portfolio website and one of the features I'd like to include is a fixed button that when clicked will go to the next section (portfolio piece, contact, about, whatever happens to be next) when clicked. Typically for this kind of layout I would use a smooth scroll function and then just have individual anchors targeted from different buttons but I've never tried to make one button that will do it all. Is there a way to change the target anchor of this button on every click or is there a better method for this that I'm not aware of? Apologize, I have no real code to show because I'm not sure how to approach this from the start, any suggestions would be greatly appreciated.
If I understand your question correctly, you can divide your one-pager into separate sections in equal length. Then have a fixed button on the page that scroll to the next section as you click.
i would say that you need to have an array of Targets.
and something like :
var targets = ["asd", "dsa", "123", "321"];
$("#SomeAnchor").click(function(e) {
e.preventDefault(); //prevents firing the event of the <a> tag
var currentTarget = $(this).attr('href'); //takes current anchor target
var nextTarget = null;
for (var i =0; i < Targets.length; i++) { //loop every target
if (Targets[i] === currentTarget ) { //if this is the current target, get next
if (i === Targets.length - 1) { //if i stands for the last position in Targets
nextTarget = Targets[0]; //first target again
} else {
nextTarget = Targets[i + 1]; //take next target
}
}
}
//i dont get what you want to do next, but now you can manage your targets.
//of course that it must not be targets array and it can be array of elements
// like $(".item") <- this will give you an array of elements containing class named 'item'
});
code is not tested n i wrote it here because i need to update my WebStorm first...
While I've done some Javascript coding, I consider myself a more novice, Frankenstein-type coder, basically cutting and pasting with trial and error to see if I can get something to work...just a heads up on my honest assessment of my experience level.
I've got a unique thing I'm developing for, and hoping to get some help with Javascript. Here's what I'm trying / need to do: for a webpage based kiosk presentation, I'm using one HTML webpage, but with multiple sections whose visibility toggles on/off based on a Javascript I currently have that works fine. (I don't want to / can't use regular HTML pages with links because of how it ends up running).
The only problem with the above issue is that there's no easy way to create a 'back' or 'previous page' link for an end page that may have multiple ways to get to it. It won't 'know' where the user came from.
So here's what I'd like to do: pass 2 variables through my OnClick javascript function, the DIV name that needs to toggle on/off ... AND a 2nd variable of the current visible DIV name so that the next DIV that toggles on can 'remember' what the previous (and now invisible) DIV was so that there can be an accurate 'back' button.
Here's some sample code:
Each DIV section that turns on an off is setup like this:
<div id="sectionName" class="content">
</div>
These DIVs have buttons/links that are setup like this:
These run a Javacript:
function toggleVisibility(selectedTab) {
var content = document.getElementsByClassName('content');
for(var i=0; i<content.length; i++) {
if(content[i].id == selectedTab) {
content[i].style.display = 'block';
} else {
content[i].style.display = 'none';
}
}
}
So what I'm hoping is that there is a way to do something like this:
So that when that is clicked, the next DIV that turns on could also include a Javascript generated link based on that passed variable, something like:
Previous<br>Menu
I'm aware that Javascript toggling of DIVs on and off may not allow the generation of a dynamic Javascript link like the one I'm describing above, so I'm throwing this out there for some help from other, far more experienced programmers. Ideally, I'd like to try and fit everything into what I've created so far, so I don't have to start over from scratch. Any ideas?
Please reference this sample page:
www.gs3creative.com/test/
You could use location hashes (mypage.html#mydivid) and then use history.back() to handle 'back' navigation.
To stitch up the div's showing on the correct hash value....
var oldHash = '';
// fires when the hash changes
function hash_changed() {
var hash = location.hash.replace('#', ''); // get the div ID
var div = document.getElementById(hash); // find the content div on the page
var allDivs = document.getElementByClassName('content'); // get all of the content divs
// hide all the content divs
for (var i = 0; i < allDivs.length; i++) {
var thisDiv = allDivs[i];
thisDiv.style.display = 'none';
}
// only show the right one
div.style.display = 'block';
}
// this triggers the event
setInterval(function() {
// if the hash has changed, fire the function
if (oldHash != location.hash) {
oldHash = location.hash;
hash_changed();
}
}, 100); // call every 100 ms so that there is no lag
So if you set the navigation to 'mypage.html#sectionName' it would hide all other div's of the class 'content' and then only show the div with the ID of 'sectionName'.
An easy solution for me would be to render two content pages on a HTML page and show and hide content when needed from a onlick handler via javascript in your CSS add a class:
function showDiv() {
document.getElementById("theObject").className = "visible";
}
CSS:
// Switch between the content adding the classes and removing the old class
.visible{
display:none;
}
.show{
display:block;
}
Another solution using sessions "php" via javascript to hold the variables with in statements.
<?php if (session_status() == PHP_SESSION_NONE) {
session_start();
$_SESSION['user_is where_variable'] = "im on page div 1";
}
This could also be done through js anyways.
javascript have a conditional statement using your $_SESSION vars;
if (variable == "im on page div 1" ){
// your functions
}else if ( variable == "im on page div 1"){
// another function
}
Create your click handler to update the variables in the session.
I have a webpage with images.
A user can click on images to show() or hyde() these images.
Sometimes, the user opens a popup to watch a video.
Then the code hide() all elements previously opened.
When the user closes the video, i need to know which elements was previously opened in order to show only them.
What is the best way to do that ?
What i've done :
I've created an array and i push images names into it.
var arr_popup_open = [];
Then, this function is called when user open a popup and hide all elements :
function toggleAllPopup() {
if( $('#popup_micro_1').is(":visible"))
{
$('#popup_micro_1').hide();
arr_popup_open.push('#popup_micro_1');
}
if( $('#popup_micro_2').is(":visible"))
{
$('#popup_micro_2').hide();
arr_popup_open.push('#popup_micro_2');
}
if( $('#popup_micro_3').is(":visible"))
{
$('#popup_micro_3').hide();
arr_popup_open.push('#popup_micro_3');
}
}
// and so on ... I have 7 images so it seems it's not very well optimized
When i need to show only images previously opened, i execute this code, a loop to show() elements in array.
$('#close_pop_up').click(function() {
for(var i= 0; i < arr_popup_open.length; i++)
{
$(arr_popup_open[i]).show();
}
});
What do you think about that ? Is there a better way to to do it ?
There are a few ways you could go about this with jQuery. Your way should work, but if you want to reduce the amount of code you could do something like:
var visibleDivs = $('div:visible', '#ContainerDiv');
Alternatively you could add a specific class to all visible elements when you show them and use:
var visibleDivs = $('.someClassName');
When hiding them due to your popup, you can store the list in the data of any element. In this case, putting it on #close_pop_up might make sense:
visibleDivs.hide();
$('#close_pop_up').data('myDivs', visibleDivs);
When you want to show them again in your click function:
$('#close_pop_up').click(function() {
$(this).data('myDivs').show();
});
Looks fine to me. Just remember to clear arr_popup_open in the start of the toggleopen function.
The alternative you could do if you really wanted is to keep the information of what is open or closed in Javascript variables that get updated when you open and close things. This way you don't need to depend on complex things such as is(:visible)
I want to add a toolbar button before the firefox search container in my addon. But it is completely clearing my navigation bar.
I suspect the offending code is due to an empty array or something but i cant be certain.
//insert before search container
if(navBar && navBar.currentSet.indexOf("mybutton-id")== -1 )//navBar exist and our button doesnt
{
var arrayCurrentSet= navBar.currentSet.split(',');
var arrayFinalSet= [];//empty at first
if(arrayCurrentSet.indexOf("search-container") != -1)//if search-container exists in current set
{
// check item by item in current set
var i= null;
while(i=arrayCurrentSet.shift() != undefined)
{
if(i == "search-container")//"search-container" found !!
{
/*insert our button after it but only if our button does not already exist*/
if(arrayFinalSet.indexOf("mybutton-id") == -1) arrayFinalSet.push("mybutton-id");
}
arrayFinalSet.push(i);
dump("arrayFinalSet "+ i);
}
}
else //damn search-container doesnt exist
{
arrayFinalSet= arrayCurrentSet;
arrayFinalSet.push("mybutton-id");//add our button to the end of whatever is available in nav bar
}
//set new navBar
navBar.currentSet= arrayFinalSet.join(',');
}
The full code is available
https://builder.addons.mozilla.org/addon/1052494/latest/
http://jsfiddle.net/CQ4wA/
I'm not too sure why the navigation bar has been removed, but I think it would be better to approach this from a different angle. Rather than messing around with an array of strings, try using DOM methods instead.
e.g.
var sC=navBar.querySelector("#search-container");
navBar.insertBefore(btn, sC);
The code you have here seems to work - but the toolbar needs to find your button somehow. Your current code doesn't even insert the button into the document, meaning that the toolbar has no chance to find it by its ID. It should be in the toolbar palette palette however, the palette also determines which buttons the user can choose from when customizing the toolbar. So you probably want to do something like this first:
var toolbox = navBar.toolbox;
toolbox.palette.appendChild(btn);
You might also want to simplify your code:
var arrayCurrentSet = navBar.currentSet.split(',');
var insertionPoint = arrayCurrentSet.indexOf("search-container");
if (insertionPoint >= 0)
arrayCurrentSet.splice(insertionPoint, 0, "mybutton-id");
else
arrayCurrentSet.push("mybutton-id");
navBar.currentSet = arrayCurrentSet.join(',');
And finally, you probably want to make the browser remember the current button set, it doesn't happen automatically:
document.persist(navBar.id, "currentset");
Note that the button that will be inserted into the toolbar is not the same as the button you added to the palette - the toolbar code clones the button, with one copy being left in the palette. So event listeners added via addEventListener will sadly be lost. It is better to use a command attribute and insert a <command> element into the document that you will attach your listener to.
Note: in XUL you usually want the command and not the click event - unless you are really interested in mouse clicks only and want to ignore the button being triggered by keyboard or other means.