on the http://www.associationtsunami.org/ site if i make a mousedown on the document the cube rotates depending on the direction the user moves the mouse.
the code is:
key code ...
).bind('mousedown touchstart', function (evt) {
delete mouse.last;
if ($(evt.target).is('a, iframe')) {
return true;
}
evt.originalEvent.touches ? evt = evt.originalEvent.touches[0] : null;
mouse.start.x = evt.pageX;
mouse.start.y = evt.pageY;
$(document).bind('mousemove touchmove', function (event) {
dragging = 1;
// Only perform rotation if one touch or mouse (e.g. still scale with pinch and zoom)
if (!touch || !(event.originalEvent && event.originalEvent.touches.length > 1)) {
event.preventDefault();
// Get touch co-ords
event.originalEvent.touches ? event = event.originalEvent.touches[0] : null;
$('.viewport').trigger('move-viewport', { x: event.pageX, y: event.pageY });
}
});
$(document).bind('mouseup touchend', function () {
dragging = 0;
$(document).unbind('mousemove touchmove');
});
});
full code https://github.com/AssociationTsunami/tsunami/blob/gh-pages/js/cube.js#L72
i would like to disable this event if a user makes the mousedown on a scrollbar - for example on the 'ONSONPARLA' page there is a TAB with ACCORDIONS, if you open any of the accordion content you get a scrollbar on the edge or within the accordion and if you try to move the scrollbar, this also moves the cube.
what is the correct way to overwrite this in the cube.js so that the cube does not turn if the event is on a scrollbar element?
It can't be done in such manner.
But there is an alternative solution. Use some custom scroll bar plugin to replace classic scroll bar. You will be able to prevent events on him. I understand this is not an excellent solution, but according to you web page you like to take a chance. :)
Here you can find few good plugins.
Good plugin example is here.
Related
I want the user to be able to scroll left and right by scrolling normally which can be achieved by scrolling with the shift key held. is there a way to run the event with the "shiftKey" variable set to true even when it is not held down?
You have to capture scroll event as wheel event, because scroll event will not work without the actual scrollbar and apply scroll data to the scroll left position.
var variation = 0;
document.addEventListener("wheel", function (e) {
variation += parseInt(e.deltaY);
console.log(variation);
//document.getElementById("body");
document.documentElement.scrollLeft = document.body.scrollLeft = (variation);
return false;
}, true);
Try this jsfiddle link which I have created jsfiddle
Background
I'm trying to achieve something, but it's really driving me crazy. So any help would be appreciated!
I've created a scene in Matter.js that will be placed in a container further down on the page. I want the visitor to be able to interact with the scene, dragging and dropping the bodies. But allowing interaction creates the problem where Matter.js prevents the user from scrolling whenever the mouse is over the canvas.
So to work around this, I'm using the following code:
mouseConstraint.mouse.element.removeEventListener("mousewheel", mouseConstraint.mouse.mousewheel);
mouseConstraint.mouse.element.removeEventListener("DOMMouseScroll", mouseConstraint.mouse.mousewheel);
This makes it possible for the user to scroll through the page and still being able to interact with the scene by clicking and dragging the bodies, as it's only the scroll event listeners that are being removed. At least on desktop.
The problem
However, on mobile, the touch event is the event that makes it possible for the user to scroll on the page, so that would require me to also remove the touchmove, touchstart and touchend event listeners from the mouse constraint in Matter.js. Like this:
mouseConstraint.mouse.element.removeEventListener('touchmove', mouseConstraint.mouse.mousemove);
mouseConstraint.mouse.element.removeEventListener('touchstart', mouseConstraint.mouse.mousedown);
mouseConstraint.mouse.element.removeEventListener('touchend', mouseConstraint.mouse.mouseup);
And here's where the problem occurs. If I remove the touch events, the user can scroll by the canvas, but the user can't interact with the scene as that requires the touch events to be activated.
So I'm wondering if there is any way to have the touch events added but only allow them to work on certain bodies in the scene? I've found that I can use mouseConstraint.body as a boolean in order to know if a body has been clicked/touched or not. Could this be used in some way with this as a base?:
Matter.Events.on(mouseConstraint, "mousedown", function(event) {
if (mouseConstraint.body) {
console.log("Body clicked!");
}
});
This is the solution that I came up with. It's not perfect, but it's better than nothing.
let touchStart;
mouseConstraint.mouse.element.addEventListener('touchstart', (event) => {
if (!mouseConstraint.body) {
touchStart = event;
}
});
mouseConstraint.mouse.element.addEventListener('touchend', (event) => {
if (!mouseConstraint.body) {
const startY = touchStart.changedTouches[0].clientY;
const endY = event.changedTouches[0].clientY;
const delta = Math.abs(startY - endY);
if (delta > 80) {
window.scrollTo(0, 600);
}
}
});
You listen for the touch start event and store that in a variable. Then in the touchend event you check if the swipe is large enough to constitute a scroll, then scroll to the content.
I have managed to implement a simple JavaScript dragging effect to create "panel windows" inside a webpage, in which I can drag the object from any corner or position. I have only used the onmousedown (to indicate a possible dragging), onmousemove (to perform dragging) and onmouseup (to stop dragging) events.
It works well except when I drag the object too near an edge and move the mouse even at a normal speed. When I move the mouse towards an area outside the object, the dragging fails until I move again to the object's area, and I have to click the object to stop dragging it.
It's like the mouse is too fast, but obviously it doesn't happen in native application windows because they are better implemented.
What checks could I add to my current code so it doesn't fail as much? It currently seems to support a little bit of this problem by somehow handling the onmouseout event, but when it happens the window shakes to return the mouse pointer to the object area, and it doesn't look so good.
JavaScript Simple Dragging Effect
<!doctype html>
<html>
<head>
<title>JavaScript Simple Dragging Effect</title>
<style type="text/css">
.moveableRect {
position:absolute;
width:320px;
height:200px;
background-color:rgba(254, 220, 186, 0.8);
}
</style>
</head>
<body bgcolor="#abcdef">
<span id="span0000" class="moveableRect"><b>Drag Me<hr /></b></span>
<textarea id="txt" cols="40" rows="12"></textarea>
<script>
//Custom variable to indicate that we
//must drag the SPAN:
///
document.getElementById("span0000").myDragFlag = false;
//When we click and hold the mouse down,
//we must activate the dragging process:
///
document.getElementById("span0000").onmousedown = function(e)
{
if(e.button==0)
{
//This is the part of the trick that allows us
//to drag the object from any starting position
//that we click on it:
///
this.startX=(e.pageX-this.offsetLeft);
this.startY=(e.pageY-this.offsetTop);
//This flag indicates that we must drag
//when moving the mouse while the button is pressed:
///
this.myDragFlag=true;
}
};
//When we move the mouse, we must follow
//the mouse cursor around:
///
document.getElementById("span0000").onmousemove = function(e)
{
var bcr=this.getBoundingClientRect();
if(this.myDragFlag)
{
//When we start dragging (moving the mouse
//while the mouse button is pressed)
//we will perform the effect of dragging from any
//initial position in the rectangle:
///
this.style.left = (e.pageX-this.startX)+"px";
this.style.top = (e.pageY-this.startY)+"px";
document.getElementById("txt").value=
"getBoundingClientRect.left="+bcr.left+"\n"+
"getBoundingClientRect.top="+bcr.top+"\n"+
"getBoundingClientRect.width="+bcr.width+"\n"+
"getBoundingClientRect.height="+bcr.height+"\n"+
"getBoundingClientRect.bottom="+bcr.bottom+"\n"+
"getBoundingClientRect.right="+bcr.right+"\n"+
"e.pageX="+e.pageX+"\n"+
"e.pageY="+e.pageY+"\n"+
"this.offsetLeft="+this.offsetLeft+"\n"+
"this.offsetTop="+this.offsetTop+"\n"+
"relatX="+(e.pageX-this.offsetLeft)+"\n"+
"relatY="+(e.pageY-this.offsetTop);
}
};
//When we release the mouse button,
//we must finish the dragging process:
///
document.getElementById("span0000").onmouseup = function(e)
{
if(e.button==0)
this.myDragFlag=false;
};
document.getElementById("span0000").onmouseout = function(e)
{
if(this.myDragFlag==true)
{
//In this code, we basically check that
//when the mouse slips out from the object
//area while we are still dragging, we will
//force moving the object back under the mouse
//pointer. Here we will check from a logical
//edge of 48 pixels, and we will move the object
//back to 90% within those pixels, vertically and/or
//horizontally. It makes look the object shaky
//but at least it is minimally functional:
///
var minEdge=48;
var edgeCorrect=0.90;
var minEdgeCorrect=(minEdge*edgeCorrect)|0;
var bcr=this.getBoundingClientRect();
var bcrw=bcr.width;
var bcrh=bcr.height;
if(this.startX<minEdge)
{
this.style.left = (e.pageX-minEdgeCorrect)+"px";
}
else if(this.startX>bcrw-minEdge)
{
this.style.left = (e.pageX-this.startX+minEdgeCorrect)+"px";
}
if(this.startY<minEdge)
{
this.style.top = (e.pageY-minEdgeCorrect)+"px";
}
else if(this.startY>bcrh-minEdge)
{
this.style.top = (e.pageY-this.startY+minEdgeCorrect)+"px";
}
}
};
</script>
</body>
</html>
Your event listener for onmousemove is placed on the draggable div. So if the mouse goes off of it, the event stops firing. And it goes off while dragging because it fires mousemove events at intervals instead of every pixel.
To fix it, put the mousemove listener on the container.
document.body.onmousemove
And you will probably need to change how you get the coordinates.
There are other ways too I imagine. But that's the easiest.
Edit
Started to doubt myself when I tried to fiddle this but eventually got it working:
http://jsfiddle.net/tg33u8mv/3/
document.body.onmousemove = function (e) {
if (myDragFlag) {
var draggable = document.getElementById("span0000");
var bcr = draggable.getBoundingClientRect();
draggable.style.left = (e.pageX - draggable.startX) + "px";
draggable.style.top = (e.pageY - draggable.startY) + "px";
}
};
And I changed myDragFlag to a scoped variable instead of this.myDragFlag.
Bonus
In this version I add a class when it is dragging. http://jsfiddle.net/tg33u8mv/4/
The CSS for this class currently disables highlighting, significantly improving the look. You could also make it change color or add a shadow for a nice effect.
I'm using the FlexSlider jQuery plugin. I'd like to disable any interactions with the slider when the user starts to scroll the page vertically on a touch device, especially when the user starts the touch on the slider and swipes vertically. How can I do that?
What I have tried so far:
Disable vertical scrolling of the page, when the user swipes horizontally on the slider: jQuery(document).on('touchmove', function(event_) { event_.preventDefault(); }) => works
Detect vertical scrolling by using the if (_scrollTop !== jQuery(window).scrollTop()) method => works
Put a layer above the slider to prevent any further touch events on the slider when scrolling vertically: jQuery('#flexslider-touch-blocker').show().focus() => doesn't work
The layer method (step 3) works when it has display: block right from the beginning, so that the touch event is triggered directly on and is being captured by the blocking layer. However the touch events obviously do not arrive on the layer if the user is already scrolling the page and I unhide the blocking layer right below the finger tip of the user. Why? Note: I give a bonus internet point for answering this why-part of the question :D
Any other method to disable FlexSlider interactions when scrolling vertically? Maybe using pure css on the plugin, maybe using overflow: hidden; or something else?
Please do not suggest to use another plugin or to create one myself, since I am using the FlexSlider features extensively.
UPDATE:
As a temporary solution I edited the source code of the plugin:
function onTouchMove(e) {
// START OF LIB EXTRANEOUS CODE
if (jQuery(this).hasClass('disabled')) { return; }
// END OF LIB EXTRANEOUS CODE
Anyway it would be great if you'd come up with a better idea.
I was having the same problem, and found a potential solution from the FlexSlider GitHub:
https://github.com/woothemes/FlexSlider/issues/530
Taking that advice, I managed to get it working by removing the touchmove listener when the user is not scrolling:
el.removeEventListener('touchmove', onTouchMove, false);
So the onTouchMove() class now looks like this:
function onTouchMove(e) {
dx = (vertical) ? startX - e.touches[0].pageY : startX - e.touches[0].pageX;
scrolling = (vertical) ? (Math.abs(dx) < Math.abs(e.touches[0].pageX - startY)) : (Math.abs(dx) < Math.abs(e.touches[0].pageY - startY));
if (!scrolling || Number(new Date()) - startT > 500) {
e.preventDefault();
if (!fade && slider.transitions) {
if (!vars.animationLoop) {
dx = dx/((slider.currentSlide === 0 && dx < 0 || slider.currentSlide === slider.last && dx > 0) ? (Math.abs(dx)/cwidth+2) : 1);
}
slider.setProps(offset + dx, "setTouch");
}
} else {
el.removeEventListener('touchmove', onTouchMove, false);
}
}
I've just created a custom carousel with images and have got previous/next arrows to move the images around.
Does jQuery have an event where I can click on the photo, drag it to the left or right and fire the same action that I currently have on the arrows?
My current code looks like this
$carousel.animate({
left: '+=' + amountToAnimate
}, 800, 'backEaseOut');
I also need to prevent Firefox from 'picking' the image up.
I'm already using jQuery UI if that helps.
You will need to add draggable() to your item and add some custom code the start event.
With more sample code it might be easier to give fuller advice, jsfiddle.net sample is best
EDIT:
You could use events api http://api.jquery.com/category/events/ , mousemove and mousedown, to figure which way to move the image, and call the animate event.
Re-using draggable , with some clever options and event functions may be better
I also need to prevent Firefox from 'picking' the image up.
Use the Mozilla CSS Extensions
-moz-user-focus:ignore;
-moz-user-select:none;
might to do the trick.
This may not be the most elegant solution but I believe it should do the job
// shortcut
var j = jQuery;
// add mouse down listener to the image
j('#image_id').mousedown(function(){
// add mouse move
j('#image_id').mouseMove(function(event){
// declare vars
var previous_x_position;
var previous_y_position;
if(x_position)
{
previous_x_position = x_position;
previous_y_position = y_position;
}
var x_position = event.pageX;
var y_position = event.pageY;
if(previous_x_position < x_position)
{
// we are moving right
}
else
{
// we are moving left
}
if(previous_y_position < y_position)
{
// we are moving down
}
else
{
// we are moving up
}
})
})