如果kendo编辑器主体具有一定的高度(限制编辑器字段的最大高度),我想阻止按ENTER键。但我的尝试都没有奏效。
<textarea data-role="editor"
data-bind="events: { keydown: onEditorKeyDown }">
</textarea>
viewModel.onEditorKeyDown = function (e) {
var key = e.keyCode;
if (key == 13) {
var editor = e.sender;
var body = editor.body;
var height = body.scrollHeight;
if (height > 195) {
?? //tried e.preventDefault(), return false etc.
}
}
};
答案 0 :(得分:1)
我设法找到了两个解决方案。一个是肮脏的黑客,其他不符合您的要求100%。但两者都或多或少地执行所需要的工作。
通过嵌入式编辑器insertParagraph
命令添加新段落,该命令会覆盖默认的keydown逻辑。因此,第一个解决方案是使用keydown
和keyup
事件临时覆盖此命令,如下所示:
<textarea data-role="editor"
data-bind="events: { keydown: onEditorKeyDown, keyup: onEditorKeyUp }">
</textarea>
// this should probably be moved to viewModel, it's here for demo puproses only
var savedCommand;
var viewModel = kendo.observable({
html: null,
isVisible: true,
onChange: function() {
kendoConsole.log("event :: change (" + kendo.htmlEncode(this.get("html")) + ")");
}
});
viewModel.onEditorKeyDown = function (e) {
var key = e.keyCode;
if (key == 13) {
var editor = e.sender;
var body = editor.body;
var height = body.scrollHeight;
if (height > 195) {
savedCommand = editor.toolbar.tools.insertParagraph.command;
editor.toolbar.tools.insertParagraph.command = function() {};
}
}
};
viewModel.onEditorKeyUp = function (e) {
var key = e.keyCode;
if (key == 13) {
if (savedCommand) {
var editor = e.sender;
editor.toolbar.tools.insertParagraph.command = savedCommand;
savedCommand = undefined;
}
}
};
kendo.bind($("#example"), viewModel);
这很好用,但看起来有点难看。
其他解决方案是根据需要执行编辑器撤消命令。它也有效,但空行总是闪烁一下:
<textarea data-role="editor"
data-bind="events: { keyup: onEditorKeyUp }"></textarea>
var viewModel = kendo.observable({
html: null,
isVisible: true,
onChange: function() {
kendoConsole.log("event :: change (" + kendo.htmlEncode(this.get("html")) + ")");
}
});
viewModel.onEditorKeyUp = function (e) {
var key = e.keyCode;
if (key == 13) {
var editor = e.sender;
var body = editor.body;
while (body.scrollHeight > 195) {
editor.exec('undo');
}
}
};
kendo.bind($("#example"), viewModel);
UPD:我发现事件更好的解决方案。您可以使用execute
活动,请参阅http://docs.telerik.com/kendo-ui/api/javascript/ui/editor#events-execute
然后检查条件并按命令名称过滤以取消插入新段落:
execute: function(e) {
alert(e.name);
e.preventDefault();
}