def GLcolor(color):
"""Convert a color to an OpenGL RGB color.
The output is a tuple of three RGB float values ranging from 0.0 to 1.0.
The input can be any of the following:
- a QColor
- a string specifying the Xwindow name of the color
- a hex string '#RGB' with 1 to 4 hexadecimal digits per color
- a tuple or list of 3 integer values in the range 0..255
- a tuple or list of 3 float values in the range 0.0..1.0
Any other input may give unpredictable results.
Examples:
>>> GLcolor('indianred')
(0.803921568627451, 0.3607843137254902, 0.3607843137254902)
>>> print(GLcolor('#ff0000'))
(1.0, 0.0, 0.0)
>>> GLcolor(red)
(1.0, 0.0, 0.0)
>>> GLcolor([200,200,255])
(0.7843137254901961, 0.7843137254901961, 1.0)
>>> GLcolor([1.,1.,1.])
(1.0, 1.0, 1.0)
"""
col = color
# as of Qt4.5, QtGui.Qcolor no longer raises an error if given
# erroneous input. Therefore, we check it ourselves
# str or QtCore.Globalcolor: convert to QColor
if (type(col) is str or isinstance(col, QtCore.Qt.GlobalColor)):
try:
col = QtGui.QColor(col)
except:
pass
# QColor: convert to (r,g,b) tuple (0..255)
if isinstance(col, QtGui.QColor):
col = (col.red(), col.green(), col.blue())
# Convert to a list and check length
try:
col = tuple(col)
if len(col) == 3:
if isInt(col[0]):
# convert int values to float
col = [c / 255. for c in col]
col = map(float, col)
# SUCCESS !
return tuple(col)
except:
pass
# No success: raise an error
raise ValueError, "GLcolor: unexpected input of type %s: %s" % (
type(color), color)
def write(self,s,color=None):
"""Write a string to the message board.
If a color is specified, the text is shown in the specified
color, but the default board color remains unchanged.
"""
if color:
savecolor = self.textColor()
self.setTextColor(QtGui.QColor(color))
else:
savecolor = None
# A single blank character seems to be generated by a print
# instruction containing a comma: skip it
if s == ' ':
return
#self.buffer += '[%s:%s]' % (len(s),s)
s = s.rstrip('\n')
if len(s) > 0:
self.append(s)
self.cursor.movePosition(QtGui.QTextCursor.End)
self.setTextCursor(self.cursor)
if savecolor:
self.setTextColor(savecolor)