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#pma/js/jquery/jquery.sortableTable.js
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272
#pma/js/jquery/jquery.sortableTable.js
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* @fileoverview A jquery plugin that allows drag&drop sorting in tables.
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* Coded because JQuery UI sortable doesn't support tables. Also it has no animation
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*
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* @name Sortable Table JQuery plugin
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*
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* @requires jQuery
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*
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*/
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/* Options:
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$('table').sortableTable({
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ignoreRect: { top, left, width, height } - relative coordinates on each element. If the user clicks
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in this area, it is not seen as a drag&drop request. Useful for toolbars etc.
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events: {
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start: callback function when the user starts dragging
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drop: callback function after an element has been dropped
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}
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})
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*/
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/* Commands:
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$('table').sortableTable('init') - equivalent to $('table').sortableTable()
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$('table').sortableTable('refresh') - if the table has been changed, refresh correctly assigns all events again
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$('table').sortableTable('destroy') - removes all events from the table
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*/
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/* Setup:
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Can be applied on any table, there is just one convention.
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Each cell (<td>) has to contain one and only one element (preferably div or span)
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which is the actually draggable element.
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*/
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(function($) {
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jQuery.fn.sortableTable = function(method) {
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var methods = {
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init : function(options) {
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var tb = new sortableTableInstance(this, options);
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tb.init();
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$(this).data('sortableTable',tb);
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},
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refresh : function( ) {
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$(this).data('sortableTable').refresh();
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},
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destroy : function( ) {
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$(this).data('sortableTable').destroy();
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}
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};
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if ( methods[method] ) {
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return methods[method].apply( this, Array.prototype.slice.call( arguments, 1 ));
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} else if ( typeof method === 'object' || ! method ) {
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return methods.init.apply( this, arguments );
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} else {
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$.error( 'Method ' + method + ' does not exist on jQuery.sortableTable' );
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}
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function sortableTableInstance(table, options) {
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var down = false;
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var $draggedEl, oldCell, previewMove, id;
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if(!options) options = {};
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/* Mouse handlers on the child elements */
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var onMouseUp = function(e) {
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dropAt(e.pageX, e.pageY);
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}
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var onMouseDown = function(e) {
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$draggedEl = $(this).children();
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if($draggedEl.length == 0) return;
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if(options.ignoreRect && insideRect({x: e.pageX - $draggedEl.offset().left, y: e.pageY - $draggedEl.offset().top}, options.ignoreRect)) return;
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down = true;
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oldCell = this;
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//move(e.pageX,e.pageY);
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if(options.events && options.events.start)
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options.events.start(this);
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return false;
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}
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var globalMouseMove = function(e) {
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if(down) {
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move(e.pageX,e.pageY);
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if(inside($(oldCell), e.pageX, e.pageY)) {
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if(previewMove != null) {
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moveTo(previewMove);
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previewMove = null;
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}
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} else
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$(table).find('td').each(function() {
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if(inside($(this), e.pageX, e.pageY)) {
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if($(previewMove).attr('class') != $(this).children().first().attr('class')) {
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if(previewMove != null) moveTo(previewMove);
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previewMove = $(this).children().first();
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if(previewMove.length > 0)
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moveTo($(previewMove), { pos: {
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top: $(oldCell).offset().top - $(previewMove).parent().offset().top,
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left: $(oldCell).offset().left - $(previewMove).parent().offset().left
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} });
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}
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return false;
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}
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});
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}
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return false;
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}
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var globalMouseOut = function() {
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if(down) {
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down = false;
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if(previewMove) moveTo(previewMove);
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moveTo($draggedEl);
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previewMove = null;
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}
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}
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// Initialize sortable table
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this.init = function() {
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id = 1;
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// Add some required css to each child element in the <td>s
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$(table).find('td').children().each(function() {
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// Remove any old occurences of our added draggable-num class
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$(this).attr('class',$(this).attr('class').replace(/\s*draggable\-\d+/g,''));
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$(this).addClass('draggable-' + (id++));
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});
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// Mouse events
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$(table).find('td').bind('mouseup',onMouseUp);
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$(table).find('td').bind('mousedown',onMouseDown);
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$(document).mousemove(globalMouseMove);
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$(document).bind('mouseleave', globalMouseOut);
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}
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// Call this when the table has been updated
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this.refresh = function() {
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this.destroy();
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this.init();
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}
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this.destroy = function() {
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// Add some required css to each child element in the <td>s
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$(table).find('td').children().each(function() {
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// Remove any old occurences of our added draggable-num class
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$(this).attr('class',$(this).attr('class').replace(/\s*draggable\-\d+/g,''));
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});
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// Mouse events
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$(table).find('td').unbind('mouseup',onMouseUp)
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$(table).find('td').unbind('mousedown',onMouseDown);
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$(document).unbind('mousemove',globalMouseMove);
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$(document).unbind('mouseleave',globalMouseOut);
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}
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function switchElement(drag, dropTo) {
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var dragPosDiff = {
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left: $(drag).children().first().offset().left - $(dropTo).offset().left,
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top: $(drag).children().first().offset().top - $(dropTo).offset().top
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};
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var dropPosDiff = null;
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if($(dropTo).children().length > 0) {
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dropPosDiff = {
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left: $(dropTo).children().first().offset().left - $(drag).offset().left,
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top: $(dropTo).children().first().offset().top - $(drag).offset().top
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};
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}
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/* I love you append(). It moves the DOM Elements so gracefully <3 */
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// Put the element in the way to old place
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$(drag).append($(dropTo).children().first()).children()
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.stop(true,true)
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.bind('mouseup',onMouseUp);
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if(dropPosDiff)
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$(drag).append($(dropTo).children().first()).children()
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.css('left',dropPosDiff.left + 'px')
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.css('top',dropPosDiff.top + 'px');
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// Put our dragged element into the space we just freed up
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$(dropTo).append($(drag).children().first()).children()
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.bind('mouseup',onMouseUp)
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.css('left',dragPosDiff.left + 'px')
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.css('top',dragPosDiff.top + 'px');
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moveTo($(dropTo).children().first(), { duration: 100 });
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moveTo($(drag).children().first(), { duration: 100 });
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if(options.events && options.events.drop) {
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// Drop event. The drag child element is moved into the drop element
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// and vice versa. So the parameters are switched.
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// Calculate row and column index
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colIdx = $(dropTo).prevAll().length;
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rowIdx = $(dropTo).parent().prevAll().length;
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options.events.drop(drag,dropTo, { col: colIdx, row: rowIdx });
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}
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}
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function move(x,y) {
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$draggedEl.offset({
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top: Math.min($(document).height(), Math.max(0, y - $draggedEl.height()/2)),
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left: Math.min($(document).width(), Math.max(0, x - $draggedEl.width()/2))
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});
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}
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function inside($el, x,y) {
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var off = $el.offset();
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return y >= off.top && x >= off.left && x < off.left + $el.width() && y < off.top + $el.height();
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}
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function insideRect(pos, r) {
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return pos.y > r.top && pos.x > r.left && pos.y < r.top + r.height && pos.x < r.left + r.width;
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}
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function dropAt(x,y) {
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if(!down) return;
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down = false;
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var switched = false;
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$(table).find('td').each(function() {
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if($(this).children().first().attr('class') != $(oldCell).children().first().attr('class') && inside($(this), x, y)) {
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switchElement(oldCell, this);
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switched = true;
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return;
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}
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});
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if(!switched) {
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if(previewMove) moveTo(previewMove);
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moveTo($draggedEl);
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}
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previewMove = null;
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}
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function moveTo(elem, opts) {
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if(!opts) opts = {};
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if(!opts.pos) opts.pos = { left: 0, top: 0 };
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if(!opts.duration) opts.duration = 200;
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$(elem).css('position','relative');
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$(elem).animate({ top: opts.pos.top, left: opts.pos.left }, {
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duration: opts.duration,
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complete: function() {
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if(opts.pos.left == 0 && opts.pos.top == 0) {
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$(elem)
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.css('position','')
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.css('left','')
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.css('top','');
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}
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}
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});
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}
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}
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}
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})( jQuery );
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