Javascript 如何在不触发更改事件的情况下选中复选框?
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How do you check a checkbox without firing a change event?
提问by Bdfy
I have simple checkbox:
我有简单的复选框:
r = new Ext.form.Checkbox({
listeners: {
check: function(checkbox, checked) {
}
}
}
r.setValue(true);
How to check checkbox without fireevent check ( I want to fireevent check ONLY from mouse click ) ? (setValue doesn't work ).
如何在没有 fireevent 检查的情况下选中复选框(我只想通过鼠标单击来检查 fireevent)?(setValue 不起作用)。
回答by Selmaril
You should suspend events before set the value and resume events after this. For example:
您应该在设置值之前暂停事件并在此之后恢复事件。例如:
myCheckBox.suspendEvents(false); // Stop all events.
//Be careful with it. Dont forget resume events!
myCheckBox.setValue(!myCheckBox.getValue()); // invert value
myCheckBox.resumeEvents(); // resume events
回答by Lev
Why dont you just set
你为什么不设置
r.checked = true,
does that not work? although it should work.
那不行吗?虽然它应该工作。
回答by VadimB
Why dont you just set r.checked = true, does that not work?
你为什么不直接设置 r.checked = true,那不行吗?
Setting checked attributes will have affect only for non-rendered control to assign initial control value. After rendering you can't use this to change value.
设置选中的属性只会影响非渲染控件分配初始控件值。渲染后,您不能使用它来更改值。
Suspend/Resume events is good practice to change control value without sending notifications.
暂停/恢复事件是在不发送通知的情况下更改控制值的好习惯。
Also you can put checked state immedially to dom element:
您也可以立即将检查状态放入 dom 元素:
item.el.dom.checked = true;
item.el.dom.checked = true;
回答by LUKE
I was already trying the accepted answer before googling but it didn't work in 4.1.3. The following did:
在谷歌搜索之前,我已经在尝试接受的答案,但它在 4.1.3 中不起作用。做了以下事情:
myCheckBox.setRawValue(true);
Hope this helps future googlers.
希望这有助于未来的谷歌员工。
回答by Douglas Mendes
Calling suspendEvents(false)
before setting the value and resumeEvents()
afterwards is a more generic approach than setRawValue
because if you're using converters (say, 1
is true
and 0
is false
) they will remain working.
suspendEvents(false)
在设置值之前和resumeEvents()
之后调用是一种更通用的方法,setRawValue
因为如果您使用转换器(例如1
istrue
和0
is false
),它们将继续工作。