From 6a568ed4cf0b50bb82e41d3b1fce28619e49fb03 Mon Sep 17 00:00:00 2001
From: Caleb Harrelson <charrelson@itagroup.com>
Date: Fri, 23 Aug 2013 13:10:11 -0500
Subject: [PATCH] Added plugin to hijack length menu into a length +
 all/selected items.

---
 .../row-based/TableTools.ShowSelectedOnly.js  | 163 ++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 filtering/row-based/TableTools.ShowSelectedOnly.js

diff --git a/filtering/row-based/TableTools.ShowSelectedOnly.js b/filtering/row-based/TableTools.ShowSelectedOnly.js
new file mode 100644
index 0000000..f8dc4ba
--- /dev/null
+++ b/filtering/row-based/TableTools.ShowSelectedOnly.js
@@ -0,0 +1,163 @@
+/**
+ * Used in combination with TableTools and selectable rows, this will allow you to switch between showing all rows and just the selected ones.
+ *  @author <a href="http://stackoverflow.com/users/8507/phloopy">Caleb Harrelson</a>
+ *
+ *  @example
+ *  $('#example').dataTable({
+ *      "sDom": 'T<"clear">Sfrtip',
+ *      "oTableTools": {
+ *          "sRowSelect": "multi",
+ *      },
+ *      "oLanguage": {
+ *          "oFilterSelectedOptions": {
+ *              AllText: "All Widgets",
+ *              SelectedText: "Selected Widgets"
+ *          }
+ *      }
+ *  });
+ */
+
+(function (window, document, $, undefined) {
+
+    $.fn.dataTable.SelectedLengthMenu = function(oSettings) {
+        if (oSettings.oScroll.bInfinite) {
+            return null;
+        }
+
+        /* This can be overruled by not using the _MENU_ var/macro in the language variable */
+        var sName = 'name="' + oSettings.sTableId + '_length"';
+        var sStdMenu = '<select size="1" ' + sName + '>';
+        var i, iLen;
+        var aLengthMenu = oSettings.aLengthMenu;
+
+        if (aLengthMenu.length == 2 && typeof aLengthMenu[0] === 'object' &&
+            typeof aLengthMenu[1] === 'object') {
+            for (i = 0, iLen = aLengthMenu[0].length; i < iLen; i++) {
+                sStdMenu += '<option value="' + aLengthMenu[0][i] + '">' + aLengthMenu[1][i] + '</option>';
+            }
+        } else {
+            for (i = 0, iLen = aLengthMenu.length; i < iLen; i++) {
+                sStdMenu += '<option value="' + aLengthMenu[i] + '">' + aLengthMenu[i] + '</option>';
+            }
+        }
+        sStdMenu += '</select>';
+
+        // select box to show all or only selected items
+        var oFilterSelectedOptions = oSettings.oLanguage.oFilterSelectedOptions;
+        if (!oFilterSelectedOptions)
+            oFilterSelectedOptions = { "AllText": "All Items", "SelectedText": "Selected Items" };
+
+        var sSelectedMenu = '<select name="' + oSettings.sTableId + '_selectedFilter">';
+        if (typeof oFilterSelectedOptions === 'object') {
+            sSelectedMenu += '<option value="All">' + oFilterSelectedOptions.AllText + '</option>';
+            sSelectedMenu += '<option value="Selected">' + oFilterSelectedOptions.SelectedText + '</option>';
+        } else {
+            sSelectedMenu += '<option value="All">' + oFilterSelectedOptions[0] + '</option>';
+            sSelectedMenu += '<option value="Selected">' + oFilterSelectedOptions[1] + '</option>';
+        }
+        sSelectedMenu += '</select>';
+
+
+
+        var nLength = document.createElement('div');
+        if (!oSettings.aanFeatures.l) {
+            nLength.id = oSettings.sTableId + '_length';
+        }
+        nLength.className = oSettings.oClasses.sLength;
+        var sLengthMenu = oSettings.oLanguage.sLengthMenu;
+        if (sLengthMenu == 'Show _MENU_ entries')
+            sLengthMenu = 'Show _MENU_ of _SELECTEDMENU_';
+
+        nLength.innerHTML = '<span>' + sLengthMenu.replace('_MENU_', sStdMenu).replace('_SELECTEDMENU_', sSelectedMenu) + '</span>';
+
+        var $lengthSelect = $('select[name="' + oSettings.sTableId + '_length"]', nLength);
+        if ($lengthSelect.length == 0)
+            $lengthSelect = $('select :eq(0)', nLength);
+        
+        /*
+         * Set the length to the current display length - thanks to Andrea Pavlovic for this fix,
+         * and Stefan Skopnik for fixing the fix!
+         */
+        $lengthSelect.find('option[value="' + oSettings._iDisplayLength + '"]', nLength).attr("selected", true);
+
+
+        $lengthSelect.bind('change.DT', function(e) {
+            var iVal = $(this).val();
+
+            /* Update all other length options for the new display */
+            var n = oSettings.aanFeatures.S;
+            for (i = 0, iLen = n.length; i < iLen; i++) {
+                if (n[i] != this.parentNode) {
+                    $('select', n[i]).val(iVal);
+                }
+            }
+
+            /* Redraw the table */
+            oSettings._iDisplayLength = parseInt(iVal, 10);
+            oSettings.oApi._fnCalculateEnd(oSettings);
+
+            /* If we have space to show extra rows (backing up from the end point - then do so */
+            if (oSettings.fnDisplayEnd() == oSettings.fnRecordsDisplay()) {
+                oSettings._iDisplayStart = oSettings.fnDisplayEnd() - oSettings._iDisplayLength;
+                if (oSettings._iDisplayStart < 0) {
+                    oSettings._iDisplayStart = 0;
+                }
+            }
+
+            if (oSettings._iDisplayLength == -1) {
+                oSettings._iDisplayStart = 0;
+            }
+
+            oSettings.oApi._fnDraw(oSettings);
+        });
+
+
+        var $filterSelectedSelect = $('select[name="' + oSettings.sTableId + '_selectedFilter"]', nLength);
+        if ($filterSelectedSelect.length == 0)
+            $filterSelectedSelect = $('select :eq(1)', nLength);
+
+        $filterSelectedSelect.find('option[value="' + oSettings._sFilterSelected + '"]', nLength).attr('selected', true);
+
+        $filterSelectedSelect.on('change', function () {
+            oSettings._sFilterSelected = $(this).val();
+            $('#' + oSettings.sTableId).dataTable().fnDraw();
+        });
+        
+
+        $('select', nLength).attr('aria-controls', oSettings.sTableId);
+
+        return nLength;
+    };
+
+    $.fn.dataTableExt.afnFiltering.push(
+        function (oSettings, aData, iDataIndex) {
+            var $filterSelectedSelect = $('select[name="' + oSettings.sTableId + '_selectedFilter"]');
+            if ($filterSelectedSelect.length == 0)
+                return true; // feature not enabled
+
+            if ($filterSelectedSelect.val() == 'All')
+                return true; // all items selected
+
+
+            var oTable = $('#' + oSettings.sTableId).dataTable();
+            var row = oTable.fnGetNodes(iDataIndex);
+            var oTableTools = TableTools.fnGetInstance(oSettings.sTableId);
+            var isSelected = oTableTools.fnIsSelected(row);
+
+            return isSelected;
+        }
+    );
+
+
+    // Subscribe the feature plug-in to DataTables, ready for use
+    $.fn.dataTableExt.aoFeatures.push({
+        "fnInit": function (oSettings) {
+            return new $.fn.dataTable.SelectedLengthMenu(oSettings);
+        },
+        "cFeature": "S",
+        "sFeature": "SelectedLengthMenu"
+    });
+    
+
+
+})(window, document, jQuery);
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