Dom-drag.js

Dom-drag.js
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/************************************************** * 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;}};