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您可以使用Ctrl + Z撤消控件中的操作。 然后,您可以使用Ctrl + Y重做您取消的操作。
您可以撤消以下类型的操作:
以下操作不响应Ctrl + Z:
您可以使用 options.allowUndo 属性阻止或允许代码中的撤消操作。
将allowUndo属性设置为true后,您可以使用 startTransaction() 方法, undoTransaction() 方法 和 endTransaction() 方法。
本示例设置 options.allowUndo 属性并指定一个操作。
spread.options.allowUndo = true;
spread.commandManager().execute({cmd: "outlineRow", sheetName: activeSheet.name(), index: 3, count: 5});
本示例使用 startTransaction() 方法变更单元格的背景颜色, undoTransaction() 方法 和 endTransaction() 方法。
var command = { canUndo: true, execute: function (context, options, isUndo)
{ var Commands = GC.Spread.Sheets.Commands;
if (isUndo)
{
Commands.undoTransaction(context, options);
return true;
}
else
{
Commands.startTransaction(context, options);
var sheet = context.getSheetFromName(options.sheetName);
var cell = sheet.getCell(options.row, options.col);
cell.backColor(options.backColor);
Commands.endTransaction(context, options);
return true;
}
}
};
var spread = GC.Spread.Sheets.findControl(document.getElementById("sampleDiv"));
var commandManager = spread.commandManager();
commandManager.register("changeBackColor", command);
commandManager.execute({ cmd: "changeBackColor", sheetName: spread.getSheet(0).name(), row: 1, col: 2, backColor: "red" });
您可以通过控制撤消和重做堆栈大小来设置撤消和重做操作的数量限制。 undoManager 类中的 maxSize 方法可以用来做同样的事情。 这有助于通过减少内存消耗来提高应用程序的性能。
如果将无效值传递给 maxSize 方法,则返回 undoManager。
注意: 如果将无效值传递给 maxSize 方法,则返回 undoManager。
var spread = GC.Spread.Sheets.findControl(document.getElementById('ss'));
let undoManager = spread.undoManager();
undoManager.maxSize(20); // 设置最大尺寸.
let maxSize = undoManager.maxSize(); // 获取最大尺寸.
您可以使用 getUndoStack 和 getRedoStack 函数来检索撤消和重做堆栈。 这些函数将堆栈作为对象返回,包括工作表名称和命令的字符串值。
function getUndoStackFunction() {
console.log(spread.undoManager().getUndoStack());
}
function getRedoStackFunction() {
console.log(spread.undoManager().getRedoStack());
}
您还可以使用这些功能创建自定义菜单并在电子表格中显示撤消和重做操作的列表。
<body>
<input type="button" value="Get Undo Stack" onclick="getUndoStackFunction()">
<input type="button" value="Get Redo Stack" onclick="getRedoStackFunction()">
</body>
SpreadJS 设计器将撤消和重做堆栈显示为下拉列表中的操作列表。 您可以选择任何操作在该特定点导航电子表格。