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kaklik |
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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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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.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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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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Drag.obj.root.onDrag(nx, ny); |
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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 ? "top" : "bottom"])); |
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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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}; |