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dragdrop.js
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/*
http://simonwillison.net/2003/feb/13/bookmarkletfixed/
Image Drag bookmarklet, by Simon Willison
8th February 2003
Since original link is taken off, the bookmarklet has been uploaded on github @
http://github.com/aleemb/image-drag-bookmarklet/raw/master/dragdrop.js
Bookmarklet URL:
javascript:void(d=document);void(h=d.getElementsByTagName('head')[0]);void((s=d.createElement('script')).setAttribute('src','http://github.com/aleemb/image-drag-bookmarklet/raw/master/dragdrop.js'));void(h.appendChild(s));
*/
/* Find position functions by PPK, see
http://www.xs4all.nl/~ppk/js/index.html?/~ppk/js/findpos.html
*/
function findPosX(obj) {
var curleft = 0;
if (obj.offsetParent) {
while (obj.offsetParent) {
curleft += obj.offsetLeft
obj = obj.offsetParent;
}
} else if (obj.x) {
curleft += obj.x;
}
return curleft;
}
function findPosY(obj) {
var curtop = 0;
if (obj.offsetParent) {
while (obj.offsetParent) {
curtop += obj.offsetTop
obj = obj.offsetParent;
}
} else if (obj.y) {
curtop += obj.y;
}
return curtop;
}
/* DOM-Drag by youngpup, see
http://www.youngpup.net/?request=/components/dom-drag.xml
*/
/**************************************************
* dom-drag.js
* 09.25.2001
* www.youngpup.net
**************************************************
* 10.28.2001 - fixed minor bug where events
* sometimes fired off the handle, not the root.
**************************************************/
var Drag = {
obj : null,
init : function(o, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
{
o.onmousedown = Drag.start;
o.hmode = bSwapHorzRef ? false : true ;
o.vmode = bSwapVertRef ? false : true ;
o.root = oRoot && oRoot != null ? oRoot : o ;
if (o.hmode && isNaN(parseInt(o.root.style.left ))) o.root.style.left = "0px";
if (o.vmode && isNaN(parseInt(o.root.style.top ))) o.root.style.top = "0px";
if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right = "0px";
if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";
o.minX = typeof minX != 'undefined' ? minX : null;
o.minY = typeof minY != 'undefined' ? minY : null;
o.maxX = typeof maxX != 'undefined' ? maxX : null;
o.maxY = typeof maxY != 'undefined' ? maxY : null;
o.xMapper = fXMapper ? fXMapper : null;
o.yMapper = fYMapper ? fYMapper : null;
o.root.onDragStart = new Function();
o.root.onDragEnd = new Function();
o.root.onDrag = new Function();
},
start : function(e)
{
var o = Drag.obj = this;
e = Drag.fixE(e);
var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
o.root.onDragStart(x, y);
o.lastMouseX = e.clientX;
o.lastMouseY = e.clientY;
if (o.hmode) {
if (o.minX != null) o.minMouseX = e.clientX - x + o.minX;
if (o.maxX != null) o.maxMouseX = o.minMouseX + o.maxX - o.minX;
} else {
if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
}
if (o.vmode) {
if (o.minY != null) o.minMouseY = e.clientY - y + o.minY;
if (o.maxY != null) o.maxMouseY = o.minMouseY + o.maxY - o.minY;
} else {
if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
}
document.onmousemove = Drag.drag;
document.onmouseup = Drag.end;
return false;
},
drag : function(e)
{
e = Drag.fixE(e);
var o = Drag.obj;
var ey = e.clientY;
var ex = e.clientX;
var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
var nx, ny;
if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);
nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));
if (o.xMapper) nx = o.xMapper(y)
else if (o.yMapper) ny = o.yMapper(x)
Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";
Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
Drag.obj.lastMouseX = ex;
Drag.obj.lastMouseY = ey;
Drag.obj.root.onDrag(nx, ny);
return false;
},
end : function()
{
document.onmousemove = null;
document.onmouseup = null;
Drag.obj.root.onDragEnd( parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]),
parseInt(Drag.obj.root.style[Drag.obj.vmode ? "top" : "bottom"]));
Drag.obj = null;
},
fixE : function(e)
{
if (typeof e == 'undefined') e = window.event;
if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
return e;
}
};
// Stuff by me
images = document.getElementsByTagName('img');
for (cImage = 0; cImage < images.length; cImage++) {
/* For each image, find the co-ordinates of the image, create a
'clone' of the image absolutely positioned to overlap its
current location, make the clone draggable and change the src
of the original image to a transparent pixel.
*/
img = images[cImage];
// Check this isn't an image we created ourselves
if (img.className == 'dontTouchThis') continue;
width = img.width;
height = img.height;
src = img.src;
left = findPosX(img);
top = findPosY(img);
newimg = document.createElement('img');
newimg.src = src;
newimg.style.position = 'absolute';
// alert('New image at x = '+left+', y = '+top);
newimg.style.width = width;
newimg.style.height = height;
newimg.style.top = top+'px';
newimg.style.left = left+'px';
newimg.className = 'dontTouchThis';
// Add to the document and make draggable
document.getElementsByTagName('body')[0].appendChild(newimg);
Drag.init(newimg);
// Make 'real' image a blank
img.src = 'http://simon.incutio.com/js/pix.gif';
img.width = width;
img.height = height;
}