liquid_feedback_frontend
view static/js/dragdrop.js @ 145:90520c9fca44
implement area filter in timeline
allows the user to ignore any area in the timeline filter.
better display in javascript off
allows the user to ignore any area in the timeline filter.
better display in javascript off
| author | Daniel Poelzleithner <poelzi@poelzi.org> |
|---|---|
| date | Thu Oct 07 00:35:48 2010 +0200 (2010-10-07) |
| parents | 8d91bccab0bf |
| children | 7492497005bd |
line source
1 window.addEventListener("load", function(event) {
2 var originalElement;
3 var draggedElement;
4 var mouseX;
5 var mouseY;
6 var mouseOffsetX;
7 var mouseOffsetY;
8 var elementOffsetX;
9 var elementOffsetY;
10 var dropFunc;
11 var dragElement = function(element, func) {
12 //if (typeof(element) == "string") element = document.getElementById(element);
13 originalElement = element;
14 draggedElement = originalElement.cloneNode(true);
15 originalElement.style.visibility = "hidden";
16 draggedElement.style.margin = 0;
17 draggedElement.style.position = "absolute";
18 draggedElement.style.left = elementOffsetX = originalElement.offsetLeft;
19 draggedElement.style.top = elementOffsetY = originalElement.offsetTop;
20 draggedElement.style.width = originalElement.clientWidth;
21 draggedElement.style.height = originalElement.clientHeight;
22 draggedElement.style.backgroundColor = "#eee";
23 draggedElement.style.opacity = 0.8;
24 originalElement.offsetParent.appendChild(draggedElement);
25 // workaround for wrong clientWidth and clientHeight information:
26 draggedElement.style.width = 2*originalElement.clientWidth - draggedElement.clientWidth;
27 draggedElement.style.height = 2*originalElement.clientHeight - draggedElement.clientHeight;
28 mouseOffsetX = mouseX;
29 mouseOffsetY = mouseY;
30 dropFunc = func;
31 };
32 window.addEventListener("mousemove", function(event) {
33 mouseX = event.pageX;
34 mouseY = event.pageY;
35 if (draggedElement) {
36 draggedElement.style.left = elementOffsetX + mouseX - mouseOffsetX;
37 draggedElement.style.top = elementOffsetY + mouseY - mouseOffsetY;
38 }
39 }, true);
40 var mouseDrop = function(event) {
41 if (draggedElement) {
42 dropFunc(
43 originalElement,
44 elementOffsetX + mouseX - mouseOffsetX,
45 elementOffsetY + mouseY - mouseOffsetY
46 );
47 originalElement.style.visibility = '';
48 draggedElement.parentNode.removeChild(draggedElement);
49 originalElement = null;
50 draggedElement = null;
51 }
52 };
53 window.addEventListener("mouseup", mouseDrop, true);
54 window.addEventListener("mousedown", mouseDrop, true);
55 var elements = document.getElementsByTagName("*");
56 for (var i=0; i<elements.length; i++) {
57 var element = elements[i];
58 if (element.className == "movable") {
59 element.addEventListener("mousedown", function(event) {
60 event.target.style.cursor = "move";
61 dragElement(event.currentTarget, function(element, dropX, dropY) {
62 event.target.style.cursor = '';
63 elementDropped(element, dropX, dropY);
64 });
65 event.preventDefault();
66 }, false);
67 } else if (element.className == "clickable") {
68 element.addEventListener("mousedown", function(event) {
69 event.stopPropagation();
70 }, false);
71 }
72 }
73 }, false);