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inputevent-handlingtclkeypad

Bind number key (numeric keypad)

I'm trying to make a fancy calculator (using button widget).

It necessary input numberkey (like 1,2,3 or num1,num2).

So i tried like this

bind . <key 1> {multiply $numberKey}

or 

bind . <1> {multiply $numberKey}

But it's not working.

how can i bind the numeric key?

Solution

  • The name of the 1 key is 1, without <…> around it.

    bind . 1 {puts "pressed one"}

    You can also use the full name, which needs to be described as a KeyPress event (which you can shorten to Key if you want):

    bind . <KeyPress-1> {puts "pressed one"}

    To get the name of an arbitrary key, try this little script:

    bind . <KeyPress> {puts "pressed %K (producing character %A)"}

    That prints the name of the key (what you need with a KeyPress prefix as a description) when you press the key. Single character keysyms can be used directly, but numbers cannot be just put in <…> because that's special cased to mean mouse button presses instead (as those are more commonly bound to specifically in most applications).