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POWijmo override methods
 

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    <p>This is a piece of <strong>jquery.wijmo.wijgrid.js</strong></p> <pre><code>(function ($) { "use strict"; $.extend($.wijmo.wijgrid, { cellEditorHelper: function () { this.currentCellEditStart = function (grid, e) { var result = false, currentCell = grid.currentCell(), view = grid._view(), rowObj, args, $innerDiv, rowType; if (currentCell._isValid() &amp;&amp; !currentCell._isEdit() &amp;&amp; (currentCell.column().dataIndex &gt;= 0)) { rowObj = currentCell._row(); if (rowObj &amp;&amp; rowObj.length) { rowType = view._getRowInfo(rowObj).type; if (rowType &amp; $.wijmo.wijgrid.rowType.data) { args = { cell: currentCell, event: e, handled: false }; if (result = grid._trigger("beforeCellEdit", null, args)) { // todo if (!args.handled) { result = defaultBeforeCellEdit(grid, args); } } if (result) { currentCell._isEdit(true); if (grid.options.showRowHeader) { $innerDiv = $(rowObj[0].cells[0]).children("div.wijmo-wijgrid-innercell"); if ($innerDiv.length) { $innerDiv.empty(); $innerDiv.append($("&lt;div&gt;&amp;nbsp;&lt;/div&gt;").addClass("ui-icon ui-icon-pencil")); } } } } } } return result; }; this.currentCellEditEnd = function (grid, e) { var currentCell = grid.currentCell(), result = false, view = grid._view(), rowObj, rowType, escPressed, args, a, b, domCell; if (!currentCell._isValid() || !currentCell._isEdit()) { return; } rowObj = currentCell._row(); if (rowObj &amp;&amp; rowObj.length) { rowType = view._getRowInfo(rowObj).type; if (!(rowType &amp; $.wijmo.wijgrid.rowType.data)) { return result; } escPressed = (e &amp;&amp; e.which === $.ui.keyCode.ESCAPE); if (!e || (!escPressed)) { args = { cell: currentCell, value: undefined }; if (result = grid._trigger("beforeCellUpdate", null, args)) { if (args.value === undefined) { args.value = getCellValue(grid, currentCell); // get raw value from editor using the default implementation. } a = args.value; // new value try { args.value = grid._parse(currentCell.column(), args.value); // try to parse raw value a = args.value; } catch (ex) { args.value = a; // restore raw value } b = currentCell.value(); // old value if (args.cell.column().dataType === "datetime") { if (a instanceof Date) { a = a.getTime(); } if (b instanceof Date) { b = b.getTime(); } } if (a !== b) { // value is changed // update datasource try { currentCell.value(args.value); } catch (ex) { result = false; grid._trigger("invalidCellValue", null, { cell: currentCell, value: args.value }); } if (result) { grid._trigger("afterCellUpdate", null, { cell: currentCell }); } } } } else { // ESC key result = true; } if (result) { args = { cell: currentCell, event: e, handled: false }; grid._trigger("afterCellEdit", null, args); $(grid._view().focusableElement()).focus(); // move focus from editor to wijgrid before editor element will be deleted. if (!args.handled) { result = defaultAfterCellEdit(grid, args); } if (result) { currentCell._isEdit(false); } if (grid.options.showRowHeader) { $(rowObj[0].cells[0]).children("div.wijmo-wijgrid-innercell").html("&amp;nbsp;"); // remove ui-icon-pencil } window.setTimeout(function () { if (!grid.destroyed) { //grid.element.focus(); currentCell = grid.currentCell(); if (args.cell.isEqual(currentCell) &amp;&amp; (domCell = currentCell.tableCell())) { // same cell? $(domCell).focus(); // restore focus } } }, 50); } } return result; }; // private function defaultBeforeCellEdit(grid, args) { var leafOpt = args.cell.column(), result = false, value, $container, $input, len, kbEvent; if (leafOpt.dataIndex &gt;= 0) { value = args.cell.value(); result = true; try { $container = args.cell.container(); if (leafOpt.dataType === "boolean") { $input = $container.children("input"); $input.focus(); if (args.event &amp;&amp; args.event.type === "keypress") { $input.one("keyup", function (e) { if (e.which === $.ui.keyCode.SPACE) { e.preventDefault(); $input[0].checked = !value; } }); } } else { $input = $("&lt;input /&gt;") .attr("type", "text") .addClass("wijgridinput wijmo-wijinput ui-state-focus") .bind("keydown", grid, checkBoxOrInputKeyDown); //the problem of inputing $input.bind(($.support.selectstart ? "selectstart" : "mousedown"), function (event) { event.stopPropagation(); }); if (args.event &amp;&amp; args.event.type === "keypress" &amp;&amp; args.event.which) { $input.val(String.fromCharCode(args.event.which)); } else { switch (args.cell.column().dataType) { case "currency": case "number": if (value !== null) { $input.val(value); // ignore formatting break; } // fall through default: $input.val(grid._toStr(args.cell.column(), value)); break; } } $container .empty() .append($input); // move caret to the end of the text len = $input.val().length; new $.wijmo.wijgrid.domSelection($input[0]).setSelection({ start: len, end: len }); $input.focus(); if ($.browser.msie) { setTimeout(function () { $input.focus(); }, 0); } // FF issue: text does not track to the new position of the caret if ($.browser.mozilla &amp;&amp; document.createEvent &amp;&amp; $input[0].dispatchEvent) { kbEvent = document.createEvent("KeyboardEvent"); kbEvent.initKeyEvent("keypress", false, true, null, false, false, false, false, 0, $.ui.keyCode.SPACE); $input[0].dispatchEvent(kbEvent); kbEvent = document.createEvent("KeyboardEvent"); kbEvent.initKeyEvent("keypress", false, true, null, false, false, false, false, $.ui.keyCode.BACKSPACE, 0); $input[0].dispatchEvent(kbEvent); } } } catch (ex) { alert(ex.message); result = false; } } return result; } function defaultAfterCellEdit(grid, args) { var leafOpt = args.cell.column(), result = false, $container, cellValue, input, rowInfo, view; if (leafOpt.dataIndex &gt;= 0) { result = true; view = grid._view(); try { $container = args.cell.container(); cellValue = grid._toStr(leafOpt, args.cell.value()); rowInfo = view._getRowInfo(grid._rows().item(args.cell.rowIndex())); if (leafOpt.dataType === "boolean") { input = $container.children("input"); if (cellValue === "true") { input.attr("checked", "checked"); } else { input.removeAttr("checked"); } } else { grid.cellFormatter.format($container, leafOpt, cellValue, rowInfo); } } catch (ex) { console.warn("defaultAfterCellEdit: " + ex.message); result = false; } } return result; } function checkBoxOrInputKeyDown(args) { if (args.which === $.ui.keyCode.ENTER) { // stop editing when Enter key is pressed var grid = args.data; if (grid) { grid._endEditInternal(args); return false; // prevent submit behaviour. } } } function getCellValue(gridView, currentCell) { var $input = currentCell.container().find(":input:first"), result = null; if ($input.length) { result = ($input.attr("type") === "checkbox") ? $input[0].checked : $input.val(); } return result; } // private * } }); })(jQuery); </code></pre> <p>How can I override this private function <code>function defaultAfterCellEdit(grid, args)</code>? Thats because it's nested from cellEditorHelper.currentCellEditStart</p> <p>How can I override that only function without copy almost entire original file?</p>
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    1. COYou can't; the function is not defined on the object; it's defined locally to this script.
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    2. COIt can be considered a design flaw? A large method with private functions, why do somenthing like this?
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    3. COMaybe .. but there must be a reason they don't want you to be able to override that behavior
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