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.
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