JavaScript - Maus
Aus Wikizone
Mausposition[Bearbeiten]
http://stackoverflow.com/questions/3234256/find-mouse-position-relative-to-element
Sometimes, when you have nested elements, one of them with the event attached to it, it can be confusing to understand what your browser sees as the parent. Here, you can specify which parent.
You take the mouse position, and then subtract it from the parent element's offset position.
var x = evt.pageX - $('#element').offset().left;
var y = evt.pageY - $('#element').offset().top;
If you're trying to get the mouse position on a page inside a scrolling pane:
var x = (evt.pageX - $('#element').offset().left) + self.frame.scrollLeft();
var y = (evt.pageY - $('#element').offset().top) + self.frame.scrollTop();
Or the position relative to the page:
var x = (evt.pageX - $('#element').offset().left) + $(window).scrollLeft();
var y = (evt.pageY - $('#element').offset().top) + $(window).scrollTop();
Note the following performance optimisation:
var offset = $('#element').offset();
// Then refer to
var x = evt.pageX - offset.left;
In this way, JQuery does not have to look up #element for each line.
Mausrichtung[Bearbeiten]
Mausrichtung - links oder rechts[Bearbeiten]
var direction = "",
oldx = 0,
mousemovemethod = function (e) {
if (e.pageX < oldx) {
direction = "left"
} else if (e.pageX > oldx) {
direction = "right"
}
document.body.innerHTML = direction;
oldx = e.pageX;
}
document.addEventListener('mousemove', mousemovemethod);
Mausrichtung 2[Bearbeiten]
var bodyElement = document.querySelector("body");
bodyElement.addEventListener("mousemove", getMouseDirection, false);
var xDirection = "";
var yDirection = "";
var oldX = 0;
var oldY = 0;
function getMouseDirection(e) {
//deal with the horizontal case
if (oldX < e.pageX) {
xDirection = "right";
} else {
xDirection = "left";
}
//deal with the vertical case
if (oldY < e.pageY) {
yDirection = "down";
} else {
yDirection = "up";
}
oldX = e.pageX;
oldY = e.pageY;
console.log(xDirection + " " + yDirection);
}
Mausrichtung 3 - jQuery Plugin[Bearbeiten]
/**
* jQuery Mouse Direction Plugin
* @version: 1.1
* @author Hasin Hayder [hasin@leevio.com | http://hasin.me]
*/
(function ($) {
var options = {};
var oldx = 0;
var oldy = 0;
var direction="";
$.mousedirection = function (opts) {
var defaults = {
};
options = $.extend(defaults, opts);
$(document).bind("mousemove", function (e) {
var activeElement = e.target || e.srcElement;
if (e.pageX > oldx && e.pageY > oldy) {
direction="bottom-right";
}
else if (e.pageX > oldx && e.pageY < oldy) {
direction="top-right";
}
else if (e.pageX < oldx && e.pageY < oldy) {
direction="top-left";
}
else if (e.pageX < oldx && e.pageY > oldy) {
direction="bottom-left";
}
else if (e.pageX > oldx && e.pageY == oldy) {
direction="right";
}
else if (e.pageX == oldx && e.pageY > oldy) {
direction="down";
}
else if (e.pageX == oldx && e.pageY < oldy) {
direction="up";
}
else if (e.pageX < oldx && e.pageY == oldy) {
direction="left";
}
$(activeElement).trigger(direction);
$(activeElement).trigger({type:"mousedirection",direction:direction});
oldx=e.pageX;
oldy=e.pageY;
});
}
})(jQuery);
Beispiel
<!Doctype html>
<head>
<title>jQuery Mouse Direction Plugin Demo</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<script src="http://code.jquery.com/jquery-latest.js" type="text/javascript" charset="utf-8"></script>
<script src="jquery.mousedirection.js" type="text/javascript" charset="utf-8"></script>
<style type="text/css">
.container {
height: 150px;
margin: 20px;
padding: 20px;
width: 300px;
border: 1px solid #888;
}
</style>
<body>
<div class="container">
Move your mouse over this box
</div>
<script type='text/javascript'>
$(function () {
$.mousedirection();
$(".container").bind("mousedirection", function (e) {
$(this).html("Mouse Direction: <b>"+e.direction+"</b>");
});
});
</script>
</body>
</html>
Mausrichtung 4 - in Grad[Bearbeiten]
http://stackoverflow.com/questions/22977862/calculating-angle-in-degrees-of-mouse-movement (2017-01)
$("canvas").mousemove(function(e) {
getDirection(e);
if (!set) {
x1 = e.pageX, //set starting mouse x
y1 = e.pageY, //set starting mouse y
set = true;
}
clearTimeout(thread);
thread = setTimeout(callback.bind(this, e), 100);
});
function getAngle (x1, y1, x2, y2) {
var distY = Math.abs(y2-y1); //opposite
var distX = Math.abs(x2-x1); //adjacent
var dist = Math.sqrt((distY*distY)+(distX*distX)); //hypotenuse,
//don't know if there is a built in JS function to do the square of a number
var val = distY/dist;
var aSine = Math.asin(val);
return Math.degrees(aSine); //return angle in degrees
}
function callback(e) {
x2 = e.pageX; //new X
y2 = e.pageY; //new Y
log("ANGLE: " + getAngle(x1, y1, x2, y2));
log("mouse has stopped");
set = false;
}
Math.degrees = function(radians)
{
return radians*(180/Math.PI);
}
