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title = 'Color spectrum demonstration'
# Import Pmw from this directory tree.
import sys
sys.path[:0] = ['../../..']
import string
import Tkinter
import Pmw
class Demo:
def __init__(self, parent):
parent = Tkinter.Frame(parent)
parent.pack(padx=10, pady=10, fill='both', expand=1)
self.width = 350
self.height = 250
self.canvas = Tkinter.Canvas(parent,
width = self.width, height = self.height)
self.canvas.grid(row = 0, column = 0, columnspan = 2, sticky = 'news')
self.numColors = Pmw.EntryField(parent,
labelpos = 'w',
label_text = 'Number of colors:',
entry_width = 5,
validate = 'numeric',
command = Pmw.busycallback(self.execute))
self.numColors.grid(row = 1, column = 0, sticky = 'ew')
self.correction = Pmw.EntryField(parent,
labelpos = 'w',
label_text = 'Correction:',
validate = 'real',
entry_width = 5,
command = Pmw.busycallback(self.execute))
self.correction.grid(row = 1, column = 1, sticky = 'ew')
self.saturation = Pmw.EntryField(parent,
labelpos = 'w',
label_text = 'Saturation:',
validate = 'real',
entry_width = 5,
command = Pmw.busycallback(self.execute))
self.saturation.grid(row = 2, column = 0, sticky = 'ew')
self.intensity = Pmw.EntryField(parent,
labelpos = 'w',
label_text = 'Intensity:',
validate = 'real',
entry_width = 5,
command = Pmw.busycallback(self.execute))
self.intensity.grid(row = 2, column = 1, sticky = 'ew')
self.extraOrange = Pmw.EntryField(parent,
labelpos = 'w',
label_text = 'Emphasize orange (0 or 1):',
validate = {'validator' : 'numeric', 'min' : 0, 'max' : 1},
entry_width = 5,
command = Pmw.busycallback(self.execute))
self.extraOrange.grid(row = 3, column = 0, sticky = 'ew')
parent.grid_columnconfigure(0, weight = 1)
parent.grid_columnconfigure(1, weight = 1)
parent.grid_rowconfigure(0, weight = 1)
Pmw.alignlabels((self.numColors, self.saturation, self.extraOrange))
Pmw.alignlabels((self.correction, self.intensity))
# Set initial values for all entries.
self.numColors.setentry('64')
self.correction.setentry('1.5')
self.saturation.setentry('1.0')
self.intensity.setentry('1.0')
self.extraOrange.setentry('1')
self.execute()
def execute(self):
try:
numColors = string.atoi(self.numColors.get())
correction = string.atof(self.correction.get())
saturation = string.atof(self.saturation.get())
intensity = string.atof(self.intensity.get())
extraOrange = string.atof(self.extraOrange.get())
except ValueError:
self.numColors.bell()
return
if numColors <= 0:
self.numColors.bell()
return
colorList = Pmw.Color.spectrum(
numColors, correction, saturation, intensity, extraOrange)
extent = 360.0 / numColors
if numColors == 1:
# Special case circle, since create_arc does not work when
# extent is 360.
background = colorList[0]
self.canvas.create_oval(10, 10, self.width - 10, self.height - 10,
fill = background, outline = background)
for index in range(numColors):
start = index * extent - extent / 2
background = colorList[index]
self.canvas.create_arc(10, 10, self.width - 10, self.height - 10,
start = start, extent = extent,
fill = background, outline = background)
######################################################################
# Create demo in root window for testing.
if __name__ == '__main__':
root = Tkinter.Tk()
Pmw.initialise(root, fontScheme = 'pmw1')
root.title(title)
exitButton = Tkinter.Button(root, text = 'Exit', command = root.destroy)
exitButton.pack(side = 'bottom')
widget = Demo(root)
root.mainloop()
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