I have a draggable function in jquery to make it so I can drag and move elements on a div. Sometimes, when dragging the mouse comes off the div and I am not able to put back down the element.
I'm trying to add a keydown event for the escape button or something so that when pressed, the same thing happens on .on("mouseup", function(event) {
I've tried doing .on("mouseup keydown", function(event) { but it doesn't catch any keys that are being pressed.
Does anyone have any ideas on how I can cancel the drag? Either by a keydown or even on a mouseup regardless of if the mouse is on the div or not that is being dragged?
Just to be clear, the problem I am having is sometimes I will be dragging the element, I will mouseup but the mouse wasn't on the element when mouseup was called. Therefore, the element is still dragging and I no longer have my finger on the mouse and I have no way to stop the element from dragging to get it back on the document.
EDIT: Here is a jsfiddle, notice I am trying to get this to work on a scaled container. youtube video showing drag glitch
(function($) {
$.fn.drags = function(opt, callback) {
opt = $.extend({
handle: "",
cursor: "move"
}, opt);
if (opt.handle === "") {
var $el = this;
} else {
var $el = this.find(opt.handle);
}
return $el.css('cursor', opt.cursor).on("mousedown", function(e) {
if (opt.handle === "") {
var $drag = $(this).addClass('draggable');
} else {
var $drag = $(this).addClass('active-handle').parent().addClass('draggable');
}
var z_idx = $drag.css('z-index'),
drg_h = $drag.outerHeight(),
drg_w = $drag.outerWidth(),
pos_y = $drag.offset().top + drg_h - e.pageY,
pos_x = $drag.offset().left + drg_w - e.pageX;
$drag.css('z-index', 1000).parents().on("mousemove", function(e) {
$('.draggable').offset({
top: e.pageY + pos_y - drg_h,
left: e.pageX + pos_x - drg_w
}).on("mouseup", function() {
$(this).removeClass('draggable').css('z-index', z_idx);
});
});
e.preventDefault();
}).on("mouseup", function(event) {
if (opt.handle === "") {
$(this).removeClass('draggable');
} else {
$(this).removeClass('active-handle').parent().removeClass('draggable');
}
if (typeof callback == 'function') {
alert("this is a callback");
}
});
}
})(jQuery);
Here are a few things that might work:
Instead of listening for mouseup on the target element, listen for it on document.body. That way it will fire regardless of if the cursor is over the dragged element.
If you want to cancel the drag when the cursor wanders out of the page, add an event listener for mouseleave on document.body and use it to cancel the drag.
If you make a code-pen (or similar) test case, I will be happy to dig into the code.
Edit__
Handling mouseleave on the document prevents it from getting stuck in a draggable state. It also fixes the multiplied movement that you were seeing.
$(document.body).on('mouseleave', function(){
$el.removeClass('draggable').css('z-index', z_idx);
});
Edit2__
Previous JSFiddle was incorrect.
https://jsfiddle.net/spk4523t/6/
I have a couple of js queries.
Onclick isn't working on iPhones although its fine elsewhere.
JavaScript:
document.onclick = function(){newTarg(speedS)};
Any ideas on way round this, thinking maybe onchange but not sure how best to implement?
Also I am trying to get coordinates of the touch please help, so far code below.
JavaScript :
event = window.event;
xTarg = event.clientX;
yTarg = event.clientY;
Click events don't work on iOS use the touchstart, touchmove and touchend events to work out if the users tapped the screen.
JavaScript below:
var tap = true;
document.addEventListener('touchstart',function(e) {
tap = true;
});
document.addEventListener('touchmove',function(e) {
tap = false;
});
document.addEventListener('touchend',function(e) {
if(tap) {
//users tapped the screen
}
});
For user coords use the changedTouches object to see where on the page the user has tapped.
JavaScript:
var tap = true;
document.addEventListener('touchstart',function(e) {
tap = true;
});
document.addEventListener('touchmove',function(e) {
tap = false;
});
document.addEventListener('touchend',function(e) {
if(tap) {
var touch = e.changedTouches[0];
var pageX = touch.pageX;
var pageY = touch.pageY;
}
});
hope that helps
I created a Fiddle to demonstrate my situation.
I want to not fire the click event when the user is panning--only if it's just a simple click. I've experimented with different placements of .off() and .on() to no avail.
Thanks in advance for your help.
http://jsfiddle.net/Waxen/syTKq/3/
Updated your fiddle to do what you want. I put the re-binding of the event in a timeout so it wouldn't trigger immediately, and adjusted the mousemove to
In on click event, you can detect whether mouse was pressed DOWN or UP. So let's analyse:
DRAG:
mouse down
mosue position changes
mouse up
CLICK:
mouse down
mouse up
You see - the difference is changed mouse position. You can record click coordinate in mouse down and then compare it when muse goes back up. If it is within some treshold, the action was a click.
The only way to tell between a "click" and a "pan" would be the time the mouse has spent held down. You could create a Date in the mousedown, then another in the mouseup, and only fire your click (zoom) event if the difference between the two dates is greater than some threshold (i would guess 1/10 of a second, but you may want to experiment)
I added a "panning" bool for a solution to your problem:
see http://jsfiddle.net/syTKq/4/
Basically, if the user has mousedown and mousemove, then panning is true. once mouseup panning is false. if just mousedown, panning is false, therefore zoom.
This solution solves your problem:
var bClicking = false,
moved = false;;
var previousX, previousY;
var $slider = $('#slider'),
$wrapper = $slider.find('li.wrapper'),
$img = $slider.find('img.foo');
$img.on('click', function()
{
if(!moved)
{
doZoom();
}
});
$wrapper.mousedown(function(e) {
e.preventDefault();
previousX = e.clientX;
previousY = e.clientY;
bClicking = true;
moved = false;
});
$(document).mouseup(function(e) {
bClicking = false;
});
$wrapper.mousemove(function(e) {
if (bClicking)
{
moved = true;
var directionX = (previousX - e.clientX) > 0 ? 1 : -1;
var directionY = (previousY - e.clientY) > 0 ? 1 : -1;
$(this).scrollLeft($(this).scrollLeft() + 10 * directionX);
$(this).scrollTop($(this).scrollTop() + 10 * directionY);
previousX = e.clientX;
previousY = e.clientY;
}
});
function doZoom() {
$img.animate({
height: '+=300',
width: '+=300'
}, 500, function() {
//animation complete
});
}
Basically, it calls doZoom() only when the mouse has not moved between the mousedown and the mouseup events.
You can use the mousemove/mousedown events to set a flag that can be used in the click event handler to determine if the user was clicking or panning. Something like:
//set a flag for the click event to check
var isClick = false;
//bind to `mousedown` event to set the `isClick` flag to true
$(document).on('mousedown', function (event) {
isClick = true;
//bind to `mousemove` event to set the `isClick` flag to false (since it's not a drag
}).on('mousemove', function () {
isClick = false;
//bind to `click` event, check to see if the `isClick` flag is set to true, if so then this is a click, otherwise this is a drag
}).on('click', function () {
if (isClick) {
console.log('click');
} else {
console.log('drag');
}
});
Here is a demo: http://jsfiddle.net/SU7Ef/
i'm looking for a javascript or jQuery function to execute my function newalert() if the user is not active on the page, ( maybe with some event to check the cursor position or something like this )
i will make it auto check using settimeout , i just want the function to check the availability of user like in gmail chat, when receiving a new IM and you are not watching the gmail page, it plays a bleep sound.
Thanks
Try using the window.onblur event, or you can have a timer that is running continuously and when the mouse position is the same for x amount of milliseconds, execute the function.
Example:
var lastX, lastY = 0;
var act_timeout = null;
function doAction() {
alert( 'not active' );
return false;
}
function move( e ) {
if( e.clientY == lastY && e.clientX == lastX ) {
act_timeout = setTimeout( doAction, 5000 );
return;
}
lastX = e.clientX;
lastY = e.clientY;
act_timeout = clearTimeout( act_timeout );
}
window.onmousemove = move;
window.onblur = doAction;
You first need to identify what it means for the user to be active and in active. Obvious signs of inactivity include the window blur event, but you might want to look at these others
Window blur event
No mouse activity: no scrolling, clicks, or movement
No keyboard activity
A good list of mouse events and their caveats are provided at Quirksmode.
Once you determine what it means to be inactive, you can clear your timer when the opposing events occur (mouse is moved/clicked/scrolled, window is focused, keyboard event is a received, etc).
Is there a way to detect if a mouse button is currently down in JavaScript?
I know about the "mousedown" event, but that's not what I need. Some time AFTER the mouse button is pressed, I want to be able to detect if it is still pressed down.
Is this possible?
Regarding Pax' solution: it doesn't work if user clicks more than one button intentionally or accidentally. Don't ask me how I know :-(.
The correct code should be like that:
var mouseDown = 0;
document.body.onmousedown = function() {
++mouseDown;
}
document.body.onmouseup = function() {
--mouseDown;
}
With the test like this:
if(mouseDown){
// crikey! isn't she a beauty?
}
If you want to know what button is pressed, be prepared to make mouseDown an array of counters and count them separately for separate buttons:
// let's pretend that a mouse doesn't have more than 9 buttons
var mouseDown = [0, 0, 0, 0, 0, 0, 0, 0, 0],
mouseDownCount = 0;
document.body.onmousedown = function(evt) {
++mouseDown[evt.button];
++mouseDownCount;
}
document.body.onmouseup = function(evt) {
--mouseDown[evt.button];
--mouseDownCount;
}
Now you can check what buttons were pressed exactly:
if(mouseDownCount){
// alright, let's lift the little bugger up!
for(var i = 0; i < mouseDown.length; ++i){
if(mouseDown[i]){
// we found it right there!
}
}
}
Now be warned that the code above would work only for standard-compliant browsers that pass you a button number starting from 0 and up. IE uses a bit mask of currently pressed buttons:
0 for "nothing is pressed"
1 for left
2 for right
4 for middle
and any combination of above, e.g., 5 for left + middle
So adjust your code accordingly! I leave it as an exercise.
And remember: IE uses a global event object called … "event".
Incidentally IE has a feature useful in your case: when other browsers send "button" only for mouse button events (onclick, onmousedown, and onmouseup), IE sends it with onmousemove too. So you can start listening for onmousemove when you need to know the button state, and check for evt.button as soon as you got it — now you know what mouse buttons were pressed:
// for IE only!
document.body.onmousemove = function(){
if(event.button){
// aha! we caught a feisty little sheila!
}
};
Of course you get nothing if she plays dead and not moving.
Relevant links:
MouseEvent's button (DOM 2)
MSDN's button
Update #1: I don't know why I carried over the document.body-style of code. It will be better to attach event handlers directly to the document.
This is an old question, and the answers here seem to mostly advocate for using mousedown and mouseup to keep track of whether a button is pressed. But as others have pointed out, mouseup will only fire when performed within the browser, which can lead to losing track of the button state.
However, MouseEvent (now) indicates which buttons are currently pushed:
For all modern browsers (including Safari v11.1+ [v11.3+ on iOS]), use MouseEvent.buttons
For Safari < 11.1 (11.3 on iOS), use MouseEvent.which (buttons will be undefined for Safari) Note: which uses different numbers from buttons for Right and Middle clicks.
When registered on document, mousemove will fire immediately as soon as the cursor reenters the browser, so if the user releases outside then the state will be updated as soon as they mouse back inside.
A simple implementation might look like:
var primaryMouseButtonDown = false;
function setPrimaryButtonState(e) {
var flags = e.buttons !== undefined ? e.buttons : e.which;
primaryMouseButtonDown = (flags & 1) === 1;
}
document.addEventListener("mousedown", setPrimaryButtonState);
document.addEventListener("mousemove", setPrimaryButtonState);
document.addEventListener("mouseup", setPrimaryButtonState);
That code tracks the state of the primary mouse button (typically the left), ignoring the state of other mouse buttons.
If more complicated scenarios are required (different buttons/multiple buttons/control keys), check out the MouseEvent docs.
I think the best approach to this is to keep your own record of the mouse button state, as follows:
var mouseDown = 0;
document.body.onmousedown = function() {
mouseDown = 1;
}
document.body.onmouseup = function() {
mouseDown = 0;
}
and then, later in your code:
if (mouseDown == 1) {
// the mouse is down, do what you have to do.
}
the solution isn't good.
one could "mousedown" on the document, then "mouseup" outside the browser, and on this case the browser would still be thinking the mouse is down.
the only good solution is using IE.event object.
I know this is an old post, but I thought the tracking of mouse button using mouse up/down felt a bit clunky, so I found an alternative that may appeal to some.
<style>
div.myDiv:active {
cursor: default;
}
</style>
<script>
function handleMove( div ) {
var style = getComputedStyle( div );
if (style.getPropertyValue('cursor') == 'default')
{
// You're down and moving here!
}
}
</script>
<div class='myDiv' onmousemove='handleMove(this);'>Click and drag me!</div>
The :active selector handles the mouse click much better than mouse up/down, you just need a way of reading that state in the onmousemove event. For that I needed to cheat and relied on the fact that the default cursor is "auto" and I just change it to "default", which is what auto selects by default.
You can use anything in the object that is returned by getComputedStyle that you can use as a flag without upsetting the look of your page e.g. border-color.
I would have liked to set my own user defined style in the :active section, but I couldn't get that to work. It would be better if it's possible.
If you're working within a complex page with existing mouse event handlers, I'd recommend handling the event on capture (instead of bubble). To do this, just set the 3rd parameter of addEventListener to true.
Additionally, you may want to check for event.which to ensure you're handling actual user interaction and not mouse events, e.g. elem.dispatchEvent(new Event('mousedown')).
var isMouseDown = false;
document.addEventListener('mousedown', function(event) {
if ( event.which ) isMouseDown = true;
}, true);
document.addEventListener('mouseup', function(event) {
if ( event.which ) isMouseDown = false;
}, true);
Add the handler to document (or window) instead of document.body is important b/c it ensures that mouseup events outside of the window are still recorded.
The following snippet will attempt to execute the "doStuff" function 2 seconds after the mouseDown event occurs in document.body. If the user lifts up the button, the mouseUp event will occur and cancel the delayed execution.
I'd advise using some method for cross-browser event attachment - setting the mousedown and mouseup properties explicitly was done to simplify the example.
function doStuff() {
// does something when mouse is down in body for longer than 2 seconds
}
var mousedownTimeout;
document.body.onmousedown = function() {
mousedownTimeout = window.setTimeout(doStuff, 2000);
}
document.body.onmouseup = function() {
window.clearTimeout(mousedownTimeout);
}
In case someone else runs into this, you can use .matches with the :active selector:
function mouseDown() {
return document.body.matches(":active");
}
Using the MouseEvent api, to check the pressed button, if any:
// Mouse buttons
document.addEventListener('mousedown', e => console.log(e.buttons))
// Keyboard keys
document.addEventListener('keydown', e => console.log(e.key))
Return:
A number representing one or more buttons. For more than one button
pressed simultaneously, the values are combined (e.g., 3 is primary +
secondary).
0 : No button or un-initialized
1 : Primary button (usually the left button)
2 : Secondary button (usually the right button)
4 : Auxilary button (usually the mouse wheel button or middle button)
8 : 4th button (typically the "Browser Back" button)
16 : 5th button (typically the "Browser Forward" button)
You can combine #Pax and my answers to also get the duration that the mouse has been down for:
var mousedownTimeout,
mousedown = 0;
document.body.onmousedown = function() {
mousedown = 0;
window.clearInterval(mousedownTimeout);
mousedownTimeout = window.setInterval(function() { mousedown += 200 }, 200);
}
document.body.onmouseup = function() {
mousedown = 0;
window.clearInterval(mousedownTimeout);
}
Then later:
if (mousedown >= 2000) {
// do something if the mousebutton has been down for at least 2 seconds
}
You need to handle the MouseDown and MouseUp and set some flag or something to track it "later down the road"... :(
Short and sweet
I'm not sure why none of the previous answers worked for me, but I came up with this solution during a eureka moment. It not only works, but it is also most elegant:
Add to body tag:
onmouseup="down=0;" onmousedown="down=1;"
Then test and execute myfunction() if down equals 1:
onmousemove="if (down==1) myfunction();"
Using jQuery, the following solution handles even the "drag off the page then release case".
$(document).mousedown(function(e) {
mouseDown = true;
}).mouseup(function(e) {
mouseDown = false;
}).mouseleave(function(e) {
mouseDown = false;
});
I don't know how it handles multiple mouse buttons.
If there were a way to start the click outside the window, then bring the mouse into the window, then this would probably not work properly there either.
As said #Jack, when mouseup happens outside of browser window, we are not aware of it...
This code (almost) worked for me:
window.addEventListener('mouseup', mouseUpHandler, false);
window.addEventListener('mousedown', mouseDownHandler, false);
Unfortunately, I won't get the mouseup event in one of those cases:
user simultaneously presses a keyboard key and a mouse button, releases mouse button outside of browser window then releases key.
user presses two mouse buttons simultaneously, releases one mouse button then the other one, both outside of browser window.
var mousedown = 0;
$(function(){
document.onmousedown = function(e){
mousedown = mousedown | getWindowStyleButton(e);
e = e || window.event;
console.log("Button: " + e.button + " Which: " + e.which + " MouseDown: " + mousedown);
}
document.onmouseup = function(e){
mousedown = mousedown ^ getWindowStyleButton(e);
e = e || window.event;
console.log("Button: " + e.button + " Which: " + e.which + " MouseDown: " + mousedown);
}
document.oncontextmenu = function(e){
// to suppress oncontextmenu because it blocks
// a mouseup when two buttons are pressed and
// the right-mouse button is released before
// the other button.
return false;
}
});
function getWindowStyleButton(e){
var button = 0;
if (e) {
if (e.button === 0) button = 1;
else if (e.button === 1) button = 4;
else if (e.button === 2) button = 2;
}else if (window.event){
button = window.event.button;
}
return button;
}
this cross-browser version works fine for me.
Below jQuery example, when mouse is over $('.element'), color is changing depending on which mouse button is pressed.
var clicableArea = {
init: function () {
var self = this;
('.element').mouseover(function (e) {
self.handlemouseClick(e, $(this));
}).mousedown(function (e) {
self.handlemouseClick(e, $(this));
});
},
handlemouseClick: function (e, element) {
if (e.buttons === 1) {//left button
element.css('background', '#f00');
}
if (e.buttons === 2) { //right buttom
element.css('background', 'none');
}
}
};
$(document).ready(function () {
clicableArea.init();
});
Well, you can't check if it's down after the event, but you can check if it's Up... If it's up.. it means that no longer is down :P lol
So the user presses the button down (onMouseDown event) ... and after that, you check if is up (onMouseUp). While it's not up, you can do what you need.