Re: Drawing electronic circuits or schematics with schemdraw Python package in a wxPython GUI

Dietmar Schwertberger <[email protected]> Fri, 26 Nov 2021 17:32:42 +0100
Newsgroups	gmane.comp.python.wxpython
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On 26.11.2021 10:13, Matthias Brennwald wrote:
> Not sure what you mean here. Something else than wxPython? Something 
> else than SVG? Or something else?

Something other than static bitmaps. E.g. if you want to build a 
schematic designer, then you probably need to implement your main window 
in another way, i.e. draw the elements. But from your posting I 
understood that you just want to display some static image.


> The wxPython Demo is a bit tricky to get hold of, at least in my Linux 
> environment. The instructions at 
> https://wxpython.org/pages/downloads/index.html are a bit sketchy when 
> it comes to Linux.

Well, there's the section "Extra Files".
You can just download it from here and unpack it to your user directory 
and run from there by "python demo.py":
https://extras.wxpython.org/wxPython4/extras/4.0.0/wxPython-demo-4.0.0.tar.gz


> That said, I managed to get the schemdraw PNG data to display in a wx 
> panel. I believe the trick is convert the schemdraw PNG data to a 
> stream, which can then feed into wx.ImageFromStream(...). I added a 
> small self-contained example below (code inspired by googling for 
> examples by others). I'd appreciate any thoughts on this.

Your code looks good for me.

Regards,

Dietmar

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    <div class=3D"moz-cite-prefix">On 26.11.2021 10:13, Matthias Brennwald
      wrote:<br>
    </div>
    <blockquote type=3D"cite"
cite=3D"mid:[email protected]=
l.com">
      <meta http-equiv=3D"content-type" content=3D"text/html; charset=3DUTF=
-8">
      <div class=3D"gmail_quote">
        <div>Not sure what you mean here. Something else than wxPython?
          Something else than SVG? Or something else? <br>
        </div>
      </div>
    </blockquote>
    <p>Something other than static bitmaps. E.g. if you want to build a
      schematic designer, then you probably need to implement your main
      window in another way, i.e. draw the elements. But from your
      posting I understood that you just want to display some static
      image.<br>
    </p>
    <br>
    <blockquote type=3D"cite"
cite=3D"mid:[email protected]=
l.com">
      <div dir=3D"ltr">
        <div class=3D"gmail_quote">
          <div>The wxPython Demo is a bit tricky to get hold of, at
            least in my Linux environment. The instructions at <a
              href=3D"https://wxpython.org/pages/downloads/index.html"
              moz-do-not-send=3D"true" class=3D"moz-txt-link-freetext">http=
s://wxpython.org/pages/downloads/index.html</a>
            are a bit sketchy when it comes to Linux.</div>
        </div>
      </div>
    </blockquote>
    <p>Well, there's the section "Extra Files".<br>
      You can just download it from here and unpack it to your user
      directory and run from there by "python demo.py":<br>
<a class=3D"moz-txt-link-freetext" href=3D"https://extras.wxpython.org/wxPy=
thon4/extras/4.0.0/wxPython-demo-4.0.0.tar.gz">https://extras.wxpython.org/=
wxPython4/extras/4.0.0/wxPython-demo-4.0.0.tar.gz</a></p>
    <p><br>
    </p>
    <blockquote type=3D"cite"
cite=3D"mid:[email protected]=
l.com">
      <div dir=3D"ltr">
        <div class=3D"gmail_quote">
          <div>That said, I managed to get the schemdraw PNG data to
            display in a wx panel. I believe the trick is convert the
            schemdraw PNG data to a stream, which can then feed into
            wx.ImageFromStream(...). I added a small self-contained
            example below (code inspired by googling for examples by
            others). I'd appreciate any thoughts on this.<br>
          </div>
        </div>
      </div>
    </blockquote>
    <p>Your code looks good for me.</p>
    <p>Regards,</p>
    <p>Dietmar<br>
    </p>
  </body>
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<p></p>

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