javascript - 拖放表单/上下移动表单？

Question

我使用脚本已经有一段时间了，它允许我上下拖放 div:

<div id="root">
    <div style="position: relative;">
        <input type="text" name="stuff1" value="TEST1" />
    </div>
    <div style="position: relative;">
        <input type="text" name="stuff1" value="TEST2" />
    </div>
    <div style="position: relative;">
        <input type="text" name="stuff1" value="TEST3" />
    </div>
</div>

<script language="javascript">
    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, Drag.obj.root);
            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.root);
            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;
        }
    };

    function recalcOffsets () {
        var offsets = new Array();
        var elems = root.getElementsByTagName("div");
        for (var i = 0; i < elems.length; i++) {
            Drag.init(elems[i], null, 0, 0, null, null);
            elems[i].onDrag = function(x,y,myElem) {
                y = myElem.offsetTop;
                recalcOffsets();
                var pos = whereAmI(myElem);
                var elems = root.getElementsByTagName("div");
                if (pos != elems.length-1 && y > offsets[pos + 1]) { 
                    root.removeChild(myElem);
                    root.insertBefore(myElem, elems[pos+1]);
                    myElem.style["top"] = "0px";
                }
                if (pos != 0 && y < offsets[pos - 1]) { 
                    root.removeChild(myElem);
                    root.insertBefore(myElem, elems[pos-1]);
                    myElem.style["top"] = "0px";
                }
            };
            elems[i].onDragEnd = function(x,y,myElem) {
                myElem.style["top"] = "0px";
            }
        }

        var elems = root.getElementsByTagName("div");
        for (var i = 0; i < elems.length; i++) {
            offsets[i] = elems[i].offsetTop;
        }
    }
    function whereAmI(elem) {
        var elems = root.getElementsByTagName("div");
        for (var i = 0; i < elems.length; i++) {
            if (elems[i] == elem) { return i }
        }
    }
    recalcOffsets()
</script>

不幸的是，我不记得从哪里得到这个代码(如果您碰巧认识它，请告诉我，我将添加链接)。

我现在的问题是我想在这些 div 中包含表单，用户应该能够编辑这些表单。不幸的是，用户无法对表单执行任何操作，我确信脚本必须检查用户是否在 div 内单击，这是一个副作用。如何使表格可编辑？这种设置是否可行？如果不可能，我可以为每个 div 添加按钮(“向上”和“向下”)，这些按钮可以在单击时上下移动 div。我只需要能够在用户需要时在层次结构中向上或向下移动 div。我怎样才能做到这一点？最好的解决方案是什么？

Answer 1

问题是 mousedown 被取消。您需要检查用户点击的内容

类似这样的事情应该可以做到。

start : function(e) {
    if( ["input","select","textarea","button"].indexOf(e.target.nodeName.toLowerCase())!=-1) { 
        return true; 
    }
    /* rest of the code */

你可能必须做类似的事情才能结束。