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/**************************************************
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* dom-drag.js
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* 09.25.2001
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* www.youngpup.net
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**************************************************
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* 10.28.2001 - fixed minor bug where events
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* sometimes fired off the handle, not the root.
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**************************************************
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* 05.30.2005 - added a workaround for firefox
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* activating links when finished dragging.
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* mmosier@astrolabe.com
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**************************************************/
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<?php
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/*
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The DragList drag and drop ordered lists implementation is available under the terms of the new BSD license.
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Copyright (c) 2005, DTLink, LLC
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All rights reserved.
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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* Neither the name of DTLink, LLC nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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?>
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var Drag = {
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obj : null,
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init : function(o, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
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{
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o.onmousedown = Drag.start;
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o.hmode = bSwapHorzRef ? false : true ;
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o.vmode = bSwapVertRef ? false : true ;
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o.root = oRoot && oRoot != null ? oRoot : o ;
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if (o.hmode && isNaN(parseInt(o.root.style.left ))) o.root.style.left = "0px";
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if (o.vmode && isNaN(parseInt(o.root.style.top ))) o.root.style.top = "0px";
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if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right = "0px";
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if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";
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o.minX = typeof minX != 'undefined' ? minX : null;
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o.minY = typeof minY != 'undefined' ? minY : null;
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o.maxX = typeof maxX != 'undefined' ? maxX : null;
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o.maxY = typeof maxY != 'undefined' ? maxY : null;
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o.xMapper = fXMapper ? fXMapper : null;
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o.yMapper = fYMapper ? fYMapper : null;
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o.root.onDragStart = new Function();
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o.root.onDragEnd = new Function();
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o.root.onDrag = new Function();
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},
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start : function(e)
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{
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var o = Drag.obj = this;
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e = Drag.fixE(e);
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var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
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var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
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o.root.onDragStart(x, y);
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o.startX = x;
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o.startY = y;
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o.lastMouseX = e.clientX;
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o.lastMouseY = e.clientY;
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if (o.hmode) {
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if (o.minX != null) o.minMouseX = e.clientX - x + o.minX;
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if (o.maxX != null) o.maxMouseX = o.minMouseX + o.maxX - o.minX;
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} else {
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if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
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if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
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}
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if (o.vmode) {
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if (o.minY != null) o.minMouseY = e.clientY - y + o.minY;
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if (o.maxY != null) o.maxMouseY = o.minMouseY + o.maxY - o.minY;
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} else {
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if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
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if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
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}
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document.onmousemove = Drag.drag;
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document.onmouseup = Drag.end;
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if (o.linkDisabled) {
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var hrefs = o.root.getElementsByTagName("a");
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for (var i = 0; i < hrefs.length; i++) {
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hrefs[i].onclick = hrefs[i].prevOnclick;
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hrefs[i].prevOnclick = null;
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}
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o.linkDisabled = false;
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}
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return false;
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},
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drag : function(e)
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{
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e = Drag.fixE(e);
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var o = Drag.obj;
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var ey = e.clientY;
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var ex = e.clientX;
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var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
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var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
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var nx, ny;
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if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
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if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
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if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
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if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);
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nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
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ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));
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if (o.xMapper) nx = o.xMapper(y)
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else if (o.yMapper) ny = o.yMapper(x)
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Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";
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Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
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Drag.obj.lastMouseX = ex;
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Drag.obj.lastMouseY = ey;
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var threshold = 4;
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if (!o.linkDisabled) {
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if (Math.abs(nx - o.startX) > threshold || Math.abs(ny - o.startY) > threshold) {
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var hrefs = o.root.getElementsByTagName("a");
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for (var i = 0; i < hrefs.length; i++) {
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hrefs[i].prevOnclick = hrefs[i].onclick;
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hrefs[i].onclick = function() { return false; };
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}
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o.linkDisabled = true;
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}
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}
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Drag.obj.root.onDrag(nx, ny, Drag.obj.root);
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return false;
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},
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end : function()
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{
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document.onmousemove = null;
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document.onmouseup = null;
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Drag.obj.root.onDragEnd( parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]),
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parseInt(Drag.obj.root.style[Drag.obj.vmode
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? "top" : "bottom"]), Drag.obj.root);
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Drag.obj = null;
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},
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fixE : function(e)
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{
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if (typeof e == 'undefined') e = window.event;
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if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
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if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
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return e;
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}
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};
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