这是 jquery.wijmo.wijgrid.js
的一部分(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() && !currentCell._isEdit() && (currentCell.column().dataIndex >= 0)) {
rowObj = currentCell._row();
if (rowObj && rowObj.length) {
rowType = view._getRowInfo(rowObj).type;
if (rowType & $.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();
$innerDiv.append($("<div> </div>").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 && rowObj.length) {
rowType = view._getRowInfo(rowObj).type;
if (!(rowType & $.wijmo.wijgrid.rowType.data)) {
return result;
}
escPressed = (e && 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(" "); // remove ui-icon-pencil
}
window.setTimeout(function () {
if (!grid.destroyed) {
//grid.element.focus();
currentCell = grid.currentCell();
if (args.cell.isEqual(currentCell) && (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 >= 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 && args.event.type === "keypress") {
$input.one("keyup", function (e) {
if (e.which === $.ui.keyCode.SPACE) {
e.preventDefault();
$input[0].checked = !value;
}
});
}
} else {
$input = $("<input />")
.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 && args.event.type === "keypress" && 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 && document.createEvent && $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 >= 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);
如何覆盖此私有函数function defaultAfterCellEdit(grid, args)？那是因为它嵌套在cellEditorHelper.currentCellEditStart
如何在不复制几乎整个原始文件的情况下覆盖该功能？