Re: Copy To Clipboard Highlighted Text From Text Widget

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From	MRAB <python@mrabarnett.plus.com>
Newsgroups	comp.lang.python
Subject	Re: Copy To Clipboard Highlighted Text From Text Widget
Date	Tue, 22 Mar 2016 02:01:53 +0000
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On 2016-03-22 01:47, Chris Angelico wrote:
> On Tue, Mar 22, 2016 at 12:24 PM, Wildman via Python-list
> <python-list@python.org> wrote:
>> I have a gui that has text widget and I want to be able to
>> copy to the clipboard the text that is highlighted or the
>> text widget's entire contents if no text is highlighted.
>
> Fortunately your code reveals that you're using "tk" here, but
> otherwise, please state up-front which GUI library you're using; there
> are quite a few.
>
>> This line of code works for the highlighted text:
>>
>>     text2copy = self.text.get(tk.SEL_FIRST, tk.SEL_LAST)
>>
>> However, this code will generate an exception if no text
>> is highlighted.  So here is what I come up with and it
>> works:
>>
>> def copy_clipboard(self):
>>     try:
>>         text2copy = self.text.get(tk.SEL_FIRST, tk.SEL_LAST)
>>     except:
>>         text2copy = self.text.get()
>>     root.clipboard_clear()
>>     root.clipboard_append(text2copy)
>>
>> My concern is whether or not this approach is acceptable.
>> Is it ok to let the exception occur or would it be better
>> to avoid it?  If the later, I would appreciate suggestions
>> on how to do that, I mean how to determine if any text is
>> highlighted without generating an exception.  My research
>> was not very fruitful.
>
> You're trying to do one of two things:
>
> 1) Copy the selected text to the clipboard
> 2) If there isn't any, copy all the text.
>
> So I would say yes, the basic layout of try/except to get the text is
> perfect. However, DON'T use a bare "except:" clause. You'll get back a
> specific exception; catch that instead. Other than that, sure, your
> code looks fine.
>
It'll raise TclError.

Thread

Copy To Clipboard Highlighted Text From Text Widget Wildman <best_lay@yahoo.com> - 2016-03-21 20:24 -0500
  Re: Copy To Clipboard Highlighted Text From Text Widget Chris Angelico <rosuav@gmail.com> - 2016-03-22 12:47 +1100
    Re: Copy To Clipboard Highlighted Text From Text Widget Wildman <best_lay@yahoo.com> - 2016-03-21 22:36 -0500
      Re: Copy To Clipboard Highlighted Text From Text Widget Chris Angelico <rosuav@gmail.com> - 2016-03-22 14:46 +1100
  Re: Copy To Clipboard Highlighted Text From Text Widget MRAB <python@mrabarnett.plus.com> - 2016-03-22 02:01 +0000
    Re: Copy To Clipboard Highlighted Text From Text Widget Wildman <best_lay@yahoo.com> - 2016-03-21 22:31 -0500

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