Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: MRAB Newsgroups: comp.lang.python Subject: Re: Copy To Clipboard Highlighted Text From Text Widget Date: Tue, 22 Mar 2016 02:01:53 +0000 Lines: 46 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: news.uni-berlin.de FVoajw/c58AVFRL3aHJIRg/X5b4LJJ6uuDyFvkXtrItA== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.006 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'except:': 0.07; 'exception.': 0.07; '22,': 0.09; 'exception': 0.13; 'def': 0.13; 'instead.': 0.15; '2016': 0.16; 'clause.': 0.16; 'exception;': 0.16; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; 'highlighted': 0.16; 'message- id:@mrabarnett.plus.com': 0.16; 'perfect.': 0.16; 'received:192.168.1.4': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'subject:Text': 0.16; 'try/except': 0.16; 'wrote:': 0.16; 'any,': 0.18; 'try:': 0.18; 'widget': 0.18; 'gui': 0.18; 'library': 0.20; 'otherwise,': 0.20; 'trying': 0.22; 'header :In-Reply-To:1': 0.24; 'header:User-Agent:1': 0.26; 'chris': 0.26; 'looks': 0.29; 'concern': 0.29; 'sure,': 0.29; 'raise': 0.29; 'code': 0.30; 'tue,': 0.34; 'that,': 0.34; 'text': 0.35; 'text.': 0.35; 'quite': 0.35; "isn't": 0.35; 'but': 0.36; 'there': 0.36; 'basic': 0.36; 'to:addr:python-list': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'two': 0.37; 'say': 0.37; 'mean': 0.38; 'received:192': 0.39; 'to:addr:python.org': 0.40; 'your': 0.60; 'determine': 0.61; "you'll": 0.61; 'avoid': 0.61; 'entire': 0.61; 'back': 0.62; 'research': 0.62; 'mar': 0.65; 'python-list': 0.66; 'here': 0.66; 'fortunately': 0.84; 'few.': 0.91; 'subject:From': 0.97 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.1 cv=K//fZHiI c=1 sm=1 tr=0 a=0nF1XD0wxitMEM03M9B4ZQ==:117 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=L9H7d07YOLsA:10 a=9cW_t1CCXrUA:10 a=s5jvgZ67dGcA:10 a=IkcTkHD0fZMA:10 a=8AHkEIZyAAAA:8 a=v90uTLD8y3-FSl_38jwA:9 a=QEXdDO2ut3YA:10 X-AUTH: mrabarnett@:2500 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.0 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com comp.lang.python:105435 On 2016-03-22 01:47, Chris Angelico wrote: > On Tue, Mar 22, 2016 at 12:24 PM, Wildman via Python-list > 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.