Invert the colors of qcad3 icons
is an open-source 2D CAD program I've already been kind of fond of. It runs on Windows, Mac and Linux, its version 2 has been the base of LibreCAD, and version 3, which is a couple of months old already, is a huge evolution after version 2. Their developers have always struggled between the open-source and closed source worlds, trying to turn QCad into a business, and at the same time keeping the code open. This is a very hard and subtle fight, and their commitment to open-source is really impressive. They basically make the code available on github
, and also sell a Pro version (which costs around 30 euro and has dwg support).
One small issue that I already found an easy way to solve is this: All icons are drawn in black, which, on my white-on-black desktop theme, made them almost invisible and qcad therefore almost unusable. I then wrote this little script, that crawls through the qcad source code, opens all the svg files it finds, and changes black color with white:
print "entering " + path
for entry in os.listdir(path):
if os.path.isdir(path + os.sep + entry):
processdir(path + os.sep + entry)
elif entry[-4:] == ".svg":
print " processing " + path + os.sep + entry
f = open(path + os.sep + entry)
b = f.read()
b = b.replace( 'stroke="#000"','stroke="#fff"' )
b = b.replace( '#000000;','#ffffff;' )
f = open( path + os.sep + entry,'wb' )
To use it, simply paste the above code in a file, save it inside the qcad source folder, make it executable, and run it from there. Not sure if this will work out-of-the-box on Windows, but I believe it should.