--- /dev/null
+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) {
+ // 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);
+ }
+ }
+ }
+
+ 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;
+ 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 > 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++) {
+ var rowId = rows[i].id;
+ if (rowId && rowId && table.tableDnDConfig && table.tableDnDConfig.serializeRegexp) {
+ rowId = rowId.match(table.tableDnDConfig.serializeRegexp)[0];
+ }
+ if (result.length > 0) result += ",";
+ result += 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
+ }
+);
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projects / ipf.git / commitdiff