Develop Reference

Trouble detecting the correct data value

I am using this function below to find the data value inside of 3 possible DIVs. The data attribute dynamically changes each time that a slide changes position. I am trying to get the correct returned value of false, but it incorrectly returns true for each slide. What might be the problem?
$('.slidelink').on('click', function(e) {
var parent = $(this).parent().parent().parent().parent();
var parent_name = parent[0].nodeName.toLowerCase();
var parent_tagname = $(parent_name);
if (parent_tagname.attr('data-isactiveslide') == 'true') {
alert('working!');
}
});
And the HTML, which represent individual slides in Revolution Slider Wordpress plugin:
<rs-slides>
<rs-slide data-isactiveslide="false">
<rs-layer-wrap>
<rs-loop-wrap>
<rs-mask-wrap>
<rs-layer class="slidelink"></rs-layer>
</rs-mask-wrap>
</rs-loop-wrap>
</rs-layer-wrap>
</rs-slide>
</rs-slides>

You are walking up the tree referencing the element name. Using that to find all the elements in the page with that tag, and looking at the first one.
$('.slidelink').on('click', function(e) {
var parent = $(this).closest("[data-isactiveslide]");
console.log(parent.data('isactiveslide'))
});

get id of dropped div using dragula javascript

I am trying to update a c3.js chart using drag and drops with dragula.js, but I don't know how to get the id of the div that is dragged into a new container. My html is something like this:
<div id="collapse1" class="panel-collapse collapse">
<div id="color1" class="form-inline">1</div>
<div id="color2" class="form-inline">2</div>
<div id="color3" class="form-inline">3</div>
</div>
<div id="collapse2" class="panel-collapse collapse">
</div>
and I'm using dragula.js to drag and drop:
dragula([collapse1,collapse2]);
I am really new to jquery, but following this question, to access the id of the <div> dropped into collapse2 in I was trying to do something like this:
alert($("#collapse1.collapse2 div:first").attr("id"));
But no results. Any help would be really appreciated

Dragula has three Elements One is Source Div, Target Div and Its associated Element. Following Method Works For Me as Charm except i am Not using get() method which has version issue.
You Can Try Both.
Dragula gives you the id of dropped div, Source Div, Target Div.
const dragula = Dragula(['', '']);
dragula.on('drop', (el, target, source, sibling) => {
const elementId = $(el).attr("id");
const targetID = $(target).attr("id");
const sourceId = $(source).attr("id");
}

Can't answer the question directly because I am not familiar with dragula. However, I have used jqueryUI drag drop extensively and its a really good tool. You might want to give that framework a try.
Since you asked for an example, I dug into some of my old code. You might want to go look through the jqueryUI draggable and droppable tutorials to give you some background before looking at this. I have included parts of a function. I put little dots to show you where code has been left out. I have put <<< next the key lines for you. Notice how I use closure to make references available across different parts. Closure is soooo awesome. I abuse the death out of it, so learn how to use it if you can.
Note that once I got my drag object, that is what you are asking for. Notice how I reference the variable to my function later when I register the draggable.
Btw, notice there is also a stop drag function referenced which I don't show the definition of. If you move the declaration of the dragObject outside of startDrag then you can also see it from stopDrag since the definition of the function is "enclosed" in the outside register function.
function tapeChart_registerDraggables(parentObject,scope) {
if ((parentObject==null)||(parentObject==undefined)) {
parentObject=$jq(document.body);
}
var availablesShow = false;
var savingToServer = false;
var dragClone = null;
var startDrag = function(event, ui) {
tapeChartDraggingReservation = true;
var dragObject = event.target; <<<<<<
if (dragObject.getAttribute("unassigned")=="true") {
var is_chrome = window.chrome;
var is_safari = navigator.userAgent.toLowerCase().indexOf('safari/') > -1;
if (!is_chrome && !is_safari) {
$(ui.helper).css("margin-left", event.clientX - $(dragObject).offset().left);
$(ui.helper).css("margin-top", event.clientY - $(dragObject).offset().top);
}
}
...
// assigned rooms
if (scope!="UNBLOCKED") {
// register items in the grid
$(parentObject).find( ".NODRAGHELPER" ).draggable(
{
snap : "true",
revert : "invalid",
start: startDrag, <<<<
stop: stopDrag
}
)
.click(function(){
if ( $(this).is('.NODRAGHELPER-dragging') ) {
return;
}
// seems that the user can drop and click fast
// prevent this
if (!savingToServer) {
tapeChart_getReservation(this);
}
return false;
});
}
...

jQuery slideDown not working on element with dynamically assigned id

EDIT: I cleaned up the code a bit and narrowed down the problem.
So I'm working on a Wordpress site, and I'm trying to incorporate drop-downs into my menu on mobile, which means I have to use jQuery to assign classes and id's to my already existing elements. I have this code that already works on premade HTML, but fails on dynamically created id's.
Here is the code:
...
var menuCount = 0;
var contentCount = 0;
//find the mobile menu items
var submenus = $('[title="submenu"]');
if (submenus.length && submenus.parent('.fusion-mobile-nav-item')) {
console.log(submenus);
submenus.addClass('dropdown-title').append('<i id="dropdown-angle" class="fa fa-angle-down" aria-hidden="true"></i>');
submenus.each(function() {
$(this).attr("href", "#m" + menuCount++);
})
var content = submenus.parent().find('ul.sub-menu');
content.addClass('dropdown-content');
content.each(function() {
$(this).attr("id", "m" + contentCount++);
})
}
$(document).on('click', '.dropdown-title', function(e) {
var currentAttrValue = $(this).attr('href');
if ($(e.target).is('.d-active') || $(e.target).parent('.dropdown-title').is('.d-active')) {
$(this).removeClass('d-active');
$(currentAttrValue).slideUp(300).removeClass('d-open');
} else {
$('.dropdown-title').removeClass('d-active');
$('.dropdown-content').slideUp(300).removeClass('d-open');
$(this).addClass('d-active');
console.log($(currentAttrValue));
//THIS LINE FAILS
$(currentAttrValue).slideDown(300).addClass('d-open');
}
e.preventDefault();
});
I've registered the elements with the class dropdown-title using $(document).on(...) but I can't figure out what I need to do to register the elements with the custom ID's. I've tried putting the event callback inside the .each functions, I've tried making custom events to trigger, but none of them will get the 2nd to last line of code to trigger. There's no errors in the console, and when I console log the selector I get this:
[ul#m0.sub-menu.dropdown-content, context: document, selector: "#m0"]
0
:
ul#m0.sub-menu.dropdown-content
context
:
document
length
:
1
selector
:
"#m0"
proto
:
Object[0]
So jQuery knows the element is there, I just can't figure out how to register it...or maybe it's something I'm not thinking of, I don't know.

If you are creating your elements dynamically, you should be assigning the .on 'click' after creating those elements. Just declare the 'on click' callback code you posted after adding the ids and classes instead of when the page loads, so it gets attached to the elements with .dropdown-title class.
Check this jsFiddle: https://jsfiddle.net/6zayouxc/
EDIT: Your edited JS code works... There also might be some problem with your HTML or CSS, are you hiding your submenus? Make sure you are not making them transparent.

You're trying to call a function for a attribute, instead of the element. You probably want $(this).slideDown(300).addClass('d-active'); (also then you don't need $(this).addClass('d-active'); before)

Inside submenus.each loop add your callback listener.
As you are adding the class dropdown-title dynamically, it was not available at dom loading time, that is why event listener was not attached with those elemnts.
var menuCount = 0;
var contentCount = 0;
//find the mobile menu items
var submenus = $('[title="submenu"]');
if (submenus.length && submenus.parent('.fusion-mobile-nav-item')) {
console.log(submenus);
submenus.addClass('dropdown-title').append('<i id="dropdown-angle" class="fa fa-angle-down" aria-hidden="true"></i>');
submenus.each(function() {
$(this).attr("href", "#m" + menuCount++);
// add callback here
$(this).click( function(e) {
var currentAttrValue = $(this).attr('href');
if ($(e.target).is('.d-active') || $(e.target).parent('.dropdown-title').is('.d-active')) {
$(this).removeClass('d-active');
$(currentAttrValue).slideUp(300).removeClass('d-open');
} else {
$('.dropdown-title').removeClass('d-active');
$('.dropdown-content').slideUp(300).removeClass('d-open');
$(this).addClass('d-active');
console.log($(currentAttrValue));
$(currentAttrValue).slideDown(300).addClass('d-active');
}
e.preventDefault();
});
})
var content = submenus.parent().find('ul.sub-menu');
content.addClass('dropdown-content');
content.each(function() {
$(this).attr("id", "m" + contentCount++);
})
}

Turns out my problem is that jQuery is adding to both the mobile menu and the desktop menu, where the desktop menu is being loaded first when I search for that ID that's the one that jQuery finds. So it turns out I was completely wrong about my suspicions.

Filtering Sigma.Js graph from external events

I have an instance of Sigma.Js 1.0.0 rendering a graph in my Canvas element. (The code is below, but you can simply scroll to Step 2 of Tutorial on the main sigmajs.org page.
As you can see from that code, when the node is clicked, clickNode event occurs, which then applies filtering to the graph, showing only the clicked node and its neighborhood and dimming the others. That's quite clear.
However, how would I make exactly the same thing happen from the outside? Suppose I have the graph rendered already and I have a Tag Cloud next to it. And I want that when I click on a #hashtag, only that node is shown in the graph and the rest are dimmed. How would I do that?
Thanks!
<div id="sigma-container"></div>
<script src="path/to/sigma.js"></script>
<script src="path/to/sigma.parsers.min.gexf.js"></script>
<script>
// Add a method to the graph model that returns an
// object with every neighbors of a node inside:
sigma.classes.graph.addMethod('neighbors', function(nodeId) {
var k,
neighbors = {},
index = this.allNeighborsIndex[nodeId] || {};
for (k in index)
neighbors[k] = this.nodesIndex[k];
return neighbors;
});
sigma.parsers.gexf(
'path/to/les-miserables.gexf',
{
container: 'sigma-container'
},
function(s) {
// We first need to save the original colors of our
// nodes and edges, like this:
s.graph.nodes().forEach(function(n) {
n.originalColor = n.color;
});
s.graph.edges().forEach(function(e) {
e.originalColor = e.color;
});
// When a node is clicked, we check for each node
// if it is a neighbor of the clicked one. If not,
// we set its color as grey, and else, it takes its
// original color.
// We do the same for the edges, and we only keep
// edges that have both extremities colored.
s.bind('clickNode', function(e) {
var nodeId = e.data.node.id,
toKeep = s.graph.neighbors(nodeId);
toKeep[nodeId] = e.data.node;
s.graph.nodes().forEach(function(n) {
if (toKeep[n.id])
n.color = n.originalColor;
else
n.color = '#eee';
});
s.graph.edges().forEach(function(e) {
if (toKeep[e.source] && toKeep[e.target])
e.color = e.originalColor;
else
e.color = '#eee';
});
// Since the data has been modified, we need to
// call the refresh method to make the colors
// update effective.
s.refresh();
});
// When the stage is clicked, we just color each
// node and edge with its original color.
s.bind('clickStage', function(e) {
s.graph.nodes().forEach(function(n) {
n.color = n.originalColor;
});
s.graph.edges().forEach(function(e) {
e.color = e.originalColor;
});
// Same as in the previous event:
s.refresh();
});
}
);
</script>
<!-- [...] -->

I hope this goes some way to answering your question.
You have a tagcloud full of words, and when a word is clicked, you want to trigger the neighbors method on your sigma instance, for which you need the node id.
Simply put, you need the function which is called when the #hashtag is clicked, to be in the same scope as the sigma instantiation.
s= new sigma({
settings: {...}
})
//more code instantiating methods etc
//let's assume your tags are in elements with class='tagword' and have the hashtag stored in a 'name' attribute
$('.tagword').on('click', function(){
var name = this.attr('name');
s.graph.nodes().forEach(function(n){
if (n.label == name){
//use the node to trigger an event in sigma
//i.e. s.graph.neighbors(n.id);
};
};
};

More control when doing animations in Dashcode/Dashboard?

Recently I am giving another shot to Dashcode ;)
It's great. Is just I think is not well documented.
I have a stackLayout object with only two views in it, and a couple of buttons that interchange the views with a transition.(views show data of a large array, list)
Animations and transitions work perfect. The problem is, when I press a button while animating the animation starts again and it looks ugly (If I had n views for a datasource array of length n this should't be a problem, but this is not my case).
I want to disable buttons while animation is taking place.
Is there any callback, delegate, or any way I can get a notification when the animation is finished?
This is what I have done:
function _changeView(transitionDirection, newIndex){
//Create transition
var newTransition = new Transition(Transition.SWAP_TYPE, 0.9, Transition.EASE_TIMING);
newTransition.direction = transitionDirection;
//I only have two views. I use currentView's id to calculate not current view id and change text inside of it.
var stackLayout = document.getElementById('stackLayout').object;//stackLayout object
var nextViewId = (stackLayout.getCurrentView().id == 'view1')? '2':'1'; //
//change the text in the view that is going to appear
document.getElementById('text'+nextViewId).innerHTML = list[curIndex];
stackLayout.setCurrentViewWithTransition('view'+ nextViewId, newTransition, false);
}
function goPrevious(event)
{
curIndex--;
if(curIndex < 0){
curIndex = list.length-1;
}
_changeView(Transition.LEFT_TO_RIGHT_DIRECTION, curIndex);
}
function goNext(event)
{
curIndex++;
if(curIndex >list.length - 1){
curIndex = 0;
}
_changeView(Transition.RIGHT_TO_LEFT_DIRECTION, curIndex);
}

Eventually found the answer to this. Here's how I did it:
document.getElementById('stackLayout').object.endTransitionCallback=function(stackLayout, oldView, newView) {
//PUT CODE HERE USING stackLayout, oldView, newView to show params
}
In fact you can find all the stackLayout methods and properties in the StackLayout.js file in your project!!
Hope this helps