/** * TableDnD plug-in for JQuery, allows you to drag and drop table rows * You can set up various options to control how the system will work * Copyright (c) Denis Howlett <denish@isocra.com> * Licensed like jQuery, see http://docs.jquery.com/License. * * Configuration options: * * onDragStyle * This is the style that is assigned to the row during drag. There are limitations to the styles that can be * associated with a row (such as you can't assign a border--well you can, but it won't be * displayed). (So instead consider using onDragClass.) The CSS style to apply is specified as * a map (as used in the jQuery css(...) function). * onDropStyle * This is the style that is assigned to the row when it is dropped. As for onDragStyle, there are limitations * to what you can do. Also this replaces the original style, so again consider using onDragClass which * is simply added and then removed on drop. * onDragClass * This class is added for the duration of the drag and then removed when the row is dropped. It is more * flexible than using onDragStyle since it can be inherited by the row cells and other content. The default * is class is tDnD_whileDrag. So to use the default, simply customise this CSS class in your * stylesheet. * onDrop * Pass a function that will be called when the row is dropped. The function takes 2 parameters: the table * and the row that was dropped. You can work out the new order of the rows by using * table.rows. * onDragStart * Pass a function that will be called when the user starts dragging. The function takes 2 parameters: the * table and the row which the user has started to drag. * onAllowDrop * Pass a function that will be called as a row is over another row. If the function returns true, allow * dropping on that row, otherwise not. The function takes 2 parameters: the dragged row and the row under * the cursor. It returns a boolean: true allows the drop, false doesn't allow it. * scrollAmount * This is the number of pixels to scroll if the user moves the mouse cursor to the top or bottom of the * window. The page should automatically scroll up or down as appropriate (tested in IE6, IE7, Safari, FF2, * FF3 beta * dragHandle * This is the name of a class that you assign to one or more cells in each row that is draggable. If you * specify this class, then you are responsible for setting cursor: move in the CSS and only these cells * will have the drag behaviour. If you do not specify a dragHandle, then you get the old behaviour where * the whole row is draggable. * * Other ways to control behaviour: * * Add class="nodrop" to any rows for which you don't want to allow dropping, and class="nodrag" to any rows * that you don't want to be draggable. * * Inside the onDrop method you can also call $.tableDnD.serialize() this returns a string of the form * <tableID>[]=<rowID1>&<tableID>[]=<rowID2> so that you can send this back to the server. The table must have * an ID as must all the rows. * * Other methods: * * $("...").tableDnDUpdate() * Will update all the matching tables, that is it will reapply the mousedown method to the rows (or handle cells). * This is useful if you have updated the table rows using Ajax and you want to make the table draggable again. * The table maintains the original configuration (so you don't have to specify it again). * * $("...").tableDnDSerialize() * Will serialize and return the serialized string as above, but for each of the matching tables--so it can be * called from anywhere and isn't dependent on the currentTable being set up correctly before calling * * Known problems: * - Auto-scoll has some problems with IE7 (it scrolls even when it shouldn't), work-around: set scrollAmount to 0 * * Version 0.2: 2008-02-20 First public version * Version 0.3: 2008-02-07 Added onDragStart option * Made the scroll amount configurable (default is 5 as before) * Version 0.4: 2008-03-15 Changed the noDrag/noDrop attributes to nodrag/nodrop classes * Added onAllowDrop to control dropping * Fixed a bug which meant that you couldn't set the scroll amount in both directions * Added serialize method * Version 0.5: 2008-05-16 Changed so that if you specify a dragHandle class it doesn't make the whole row * draggable * Improved the serialize method to use a default (and settable) regular expression. * Added tableDnDupate() and tableDnDSerialize() to be called when you are outside the table */ jQuery.tableDnD = { /** Keep hold of the current table being dragged */ currentTable: null, /** Keep hold of the current drag object if any */ dragObject: null, /** The current mouse offset */ mouseOffset: null, /** Remember the old value of Y so that we don't do too much processing */ oldY: 0, /** Actually build the structure */ build: function (options) { // Set up the defaults if any this.each(function () { // This is bound to each matching table, set up the defaults and override with user options this.tableDnDConfig = jQuery.extend({ onDragStyle: null, onDropStyle: null, // Add in the default class for whileDragging onDragClass: "tDnD_whileDrag", onDrop: null, onDragStart: null, scrollAmount: 5, serializeRegexp: /[^\-]*$/, // The regular expression to use to trim row IDs serializeParamName: null, // If you want to specify another parameter name instead of the table ID dragHandle: null // If you give the name of a class here, then only Cells with this class will be draggable }, options || {}); // Now make the rows draggable jQuery.tableDnD.makeDraggable(this); }); // Now we need to capture the mouse up and mouse move event // We can use bind so that we don't interfere with other event handlers jQuery(document) .bind('mousemove', jQuery.tableDnD.mousemove) .bind('mouseup', jQuery.tableDnD.mouseup); // Don't break the chain return this; }, /** This function makes all the rows on the table draggable apart from those marked as "NoDrag" */ makeDraggable: function (table) { var config = table.tableDnDConfig; if (table.tableDnDConfig.dragHandle) { // We only need to add the event to the specified cells var cells = jQuery("td." + table.tableDnDConfig.dragHandle, table); cells.each(function () { // The cell is bound to "this" jQuery(this).mousedown(function (ev) { jQuery.tableDnD.dragObject = this.parentNode; jQuery.tableDnD.currentTable = table; jQuery.tableDnD.mouseOffset = jQuery.tableDnD.getMouseOffset(this, ev); if (config.onDragStart) { // Call the onDrop method if there is one config.onDragStart(table, this); } return false; }); }) } else { // For backwards compatibility, we add the event to the whole row var rows = jQuery("tr", table); // get all the rows as a wrapped set rows.each(function () { // Iterate through each row, the row is bound to "this" var row = jQuery(this); if (!row.hasClass("nodrag")) { row.mousedown(function (ev) { if (ev.target.tagName == "TD") { jQuery.tableDnD.dragObject = this; jQuery.tableDnD.currentTable = table; jQuery.tableDnD.mouseOffset = jQuery.tableDnD.getMouseOffset(this, ev); if (config.onDragStart) { // Call the onDrop method if there is one config.onDragStart(table, this); } return false; } }).css("cursor", "move"); // Store the tableDnD object } }); } }, updateTables: function () { this.each(function () { // this is now bound to each matching table if (this.tableDnDConfig) { jQuery.tableDnD.makeDraggable(this); } }) }, /** Get the mouse coordinates from the event (allowing for browser differences) */ mouseCoords: function (ev) { if (ev.pageX || ev.pageY) { return { x: ev.pageX, y: ev.pageY }; } return { x: ev.clientX + document.body.scrollLeft - document.body.clientLeft, y: ev.clientY + document.body.scrollTop - document.body.clientTop }; }, /** Given a target element and a mouse event, get the mouse offset from that element. To do this we need the element's position and the mouse position */ getMouseOffset: function (target, ev) { ev = ev || window.event; var docPos = this.getPosition(target); var mousePos = this.mouseCoords(ev); return { x: mousePos.x - docPos.x, y: mousePos.y - docPos.y }; }, /** Get the position of an element by going up the DOM tree and adding up all the offsets */ getPosition: function (e) { var left = 0; var top = 0; /** Safari fix -- thanks to Luis Chato for this! */ if (e.offsetHeight == 0) { /** Safari 2 doesn't correctly grab the offsetTop of a table row this is detailed here: http://jacob.peargrove.com/blog/2006/technical/table-row-offsettop-bug-in-safari/ the solution is likewise noted there, grab the offset of a table cell in the row - the firstChild. note that firefox will return a text node as a first child, so designing a more thorough solution may need to take that into account, for now this seems to work in firefox, safari, ie */ e = e.firstChild; // a table cell } while (e.offsetParent) { left += e.offsetLeft; top += e.offsetTop; e = e.offsetParent; } left += e.offsetLeft; top += e.offsetTop; return { x: left, y: top }; }, mousemove: function (ev) { if (jQuery.tableDnD.dragObject == null) { return; } var dragObj = jQuery(jQuery.tableDnD.dragObject); var config = jQuery.tableDnD.currentTable.tableDnDConfig; var mousePos = jQuery.tableDnD.mouseCoords(ev); var y = mousePos.y - jQuery.tableDnD.mouseOffset.y; //auto scroll the window var yOffset = window.pageYOffset; if (document.all) { // Windows version //yOffset=document.body.scrollTop; if (typeof document.compatMode != 'undefined' && document.compatMode != 'BackCompat') { yOffset = document.documentElement.scrollTop; } else if (typeof document.body != 'undefined') { yOffset = document.body.scrollTop; } } if (mousePos.y - yOffset < config.scrollAmount) { window.scrollBy(0, -config.scrollAmount); } else { var windowHeight = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.clientHeight; if (windowHeight - (mousePos.y - yOffset) < config.scrollAmount) { window.scrollBy(0, config.scrollAmount); } } if (y != jQuery.tableDnD.oldY) { // work out if we're going up or down... var movingDown = y > jQuery.tableDnD.oldY; // update the old value jQuery.tableDnD.oldY = y; // update the style to show we're dragging if (config.onDragClass) { dragObj.addClass(config.onDragClass); } else { dragObj.css(config.onDragStyle); } // If we're over a row then move the dragged row to there so that the user sees the // effect dynamically var currentRow = jQuery.tableDnD.findDropTargetRow(dragObj, y); if (currentRow) { try { // TODO worry about what happens when there are multiple TBODIES if (movingDown && jQuery.tableDnD.dragObject != currentRow) { jQuery.tableDnD.dragObject.parentNode.insertBefore(jQuery.tableDnD.dragObject, currentRow.nextSibling); } else if (!movingDown && jQuery.tableDnD.dragObject != currentRow) { jQuery.tableDnD.dragObject.parentNode.insertBefore(jQuery.tableDnD.dragObject, currentRow); } } catch (e) { } } } return false; }, /** We're only worried about the y position really, because we can only move rows up and down */ findDropTargetRow: function (draggedRow, y) { var rows = jQuery.tableDnD.currentTable.rows; var averageH = 0; for (var k = 0; k < rows.length; k++) { averageH += parseInt(jQuery(rows[k]).height()) } averageH = averageH / rows.length; var draggedRowHeight = draggedRow.height(); if (draggedRowHeight > averageH * 2) { draggedRowHeight = draggedRowHeight * 0.6 } else { draggedRowHeight = 0 } for (var i = 0; i < rows.length; i++) { var row = rows[i]; var rowY = this.getPosition(row).y; var rowHeight = parseInt(row.offsetHeight) / 2; if (row.offsetHeight == 0) { rowY = this.getPosition(row.firstChild).y; rowHeight = parseInt(row.firstChild.offsetHeight) / 2; } // Because we always have to insert before, we need to offset the height a bit if ((y + draggedRowHeight > rowY - rowHeight) && (y < (rowY + rowHeight))) { // that's the row we're over // If it's the same as the current row, ignore it if (row == draggedRow) { return null; } var config = jQuery.tableDnD.currentTable.tableDnDConfig; if (config.onAllowDrop) { if (config.onAllowDrop(draggedRow, row)) { return row; } else { return null; } } else { // If a row has nodrop class, then don't allow dropping (inspired by John Tarr and Famic) var nodrop = jQuery(row).hasClass("nodrop"); if (!nodrop) { return row; } else { return null; } } return row; } } return null; }, mouseup: function (e) { if (jQuery.tableDnD.currentTable && jQuery.tableDnD.dragObject) { var droppedRow = jQuery.tableDnD.dragObject; var config = jQuery.tableDnD.currentTable.tableDnDConfig; // If we have a dragObject, then we need to release it, // The row will already have been moved to the right place so we just reset stuff if (config.onDragClass) { jQuery(droppedRow).removeClass(config.onDragClass); } else { jQuery(droppedRow).css(config.onDropStyle); } jQuery.tableDnD.dragObject = null; if (config.onDrop) { // Call the onDrop method if there is one config.onDrop(jQuery.tableDnD.currentTable, droppedRow); } jQuery.tableDnD.currentTable = null; // let go of the table too } }, serialize: function () { if (jQuery.tableDnD.currentTable) { return jQuery.tableDnD.serializeTable(jQuery.tableDnD.currentTable); } else { return "Error: No Table id set, you need to set an id on your table and every row"; } }, serializeTable: function (table) { var result = ""; var tableId = table.id; var rows = table.rows; for (var i = 0; i < rows.length; i++) { if (result.length > 0) result += "&"; var rowId = rows[i].id; if (rowId && rowId && table.tableDnDConfig && table.tableDnDConfig.serializeRegexp) { rowId = rowId.match(table.tableDnDConfig.serializeRegexp)[0]; } result += tableId + '[]=' + rowId; } return result; }, serializeTables: function () { var result = ""; this.each(function () { // this is now bound to each matching table result += jQuery.tableDnD.serializeTable(this); }); return result; } } jQuery.fn.extend( { tableDnD: jQuery.tableDnD.build, tableDnDUpdate: jQuery.tableDnD.updateTables, tableDnDSerialize: jQuery.tableDnD.serializeTables } );
使用：
//表格拖动 function TDTabel() { //拖动时，禁止选中文字 $("#diagSuggestTable").tableDnD({//目标表格 //滚动的速度 id="row_1" scrollAmount: 10, onDragClass: 'highlight', //onmousemove : function () { // window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty(); //}, //当拖动排序完成后 onDrop: function (table, row) { //table 表格 row 移动的tr }, onDragStart: function (table, row) { } }); }