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Location: light9/Widgets/FlyingFader.py
43aa1ee8b3a9
3.8 KiB
text/x-python
some comments and garbage cleanup
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | from Tkinter import *
from time import time
class FlyingFader(Frame):
def __init__(self, master, variable, label, time=1.5, font=('Arial', 8),
**kw):
Frame.__init__(self, master)
self.name = label
self.variable = variable
self.fadelength = time
self.curfade = None
self.fadetimes = 0, 0
self.config({'bd':1, 'relief':'raised'})
scaleopts = {'variable' : variable, 'showvalue' : 0, 'from' : 100,
'to' : 0, 'res' : 0.1, 'width' : 20, 'length' : 200}
scaleopts.update(kw)
self.scale = Scale(self, scaleopts)
self.vlabel = Label(self, text="0.0", font=font)
self.label = Label(self, text=label, wraplength=40, font=font)
self.oldtrough = self.scale['troughcolor']
self.scale.pack(side=TOP, expand=1, fill=BOTH, anchor='c')
self.vlabel.pack(side=BOTTOM, expand=0, fill=X)
self.label.pack(side=BOTTOM, expand=0, fill=X)
for k in range(1, 10):
self.scale.bind("<Key-%d>" % k,
lambda evt, k=k: self.newfade(k * 10, evt))
self.scale.bind("<Key-0>", lambda evt: self.newfade(100, evt))
self.scale.bind("<grave>", lambda evt: self.newfade(0, evt))
self.scale.bind("<1>", self.cancelfade)
self.scale.bind("<2>", self.cancelfade)
self.scale.bind("<3>", self.mousefade)
self.variable.trace('w', self.updatelabel)
def cancelfade(self, evt):
self.fadetimes = 0, 0
self.curfade = 0, self.variable.get()
self.scale['troughcolor'] = self.oldtrough
def mousefade(self, evt):
target = float(self.tk.call(self.scale, 'get', evt.x, evt.y))
self.newfade(target, evt)
def newfade(self, newlevel, evt=None, length=None):
if length is None:
length = self.fadelength
mult = 1
if evt.state & 8 and evt.state & 4: mult = 0.25 # both
elif evt.state & 8: mult = 0.5 # alt
elif evt.state & 4: mult = 2 # control
now = time()
self.fadetimes = (now, now + (mult * length))
self.curfade = (self.variable.get(), newlevel)
self.scale['troughcolor'] = 'red'
self.gofade()
def gofade(self):
now = time()
start, end = self.fadetimes
lstart, lend = self.curfade
if now > end:
self.fadetimes = 0, 0
self.variable.set(lend)
self.scale['troughcolor'] = self.oldtrough
return
percent = (now - start) / (end - start)
newvalue = (percent * (lend - lstart)) + lstart
self.variable.set(newvalue)
colorfade(self.scale, percent)
self.after(10, self.gofade)
def updatelabel(self, *args):
self.vlabel['text'] = "%.1f" % self.variable.get()
if self.fadetimes[1] == 0: # no fade
self.vlabel['fg'] = 'black'
elif self.curfade[1] > self.curfade[0]:
self.vlabel['fg'] = 'red'
else:
self.vlabel['fg'] = 'blue'
def get(self):
return self.scale.get()
def set(self, val):
self.scale.set(val)
def colorfade(scale, lev):
low = (255, 255, 255)
high = (0, 0, 0)
out = [int(l+lev*(h-l)) for h, l in zip(high,low)]
col="#%02X%02X%02X" % tuple(out)
scale.config(troughcolor=col)
if __name__ == '__main__':
root = Tk()
root.tk_focusFollowsMouse()
FlyingFader(root, variable=DoubleVar(), label="suck").pack(side=LEFT,
expand=1, fill=BOTH)
FlyingFader(root, variable=DoubleVar(), label="moof").pack(side=LEFT,
expand=1, fill=BOTH)
FlyingFader(root, variable=DoubleVar(), label="zarf").pack(side=LEFT,
expand=1, fill=BOTH)
FlyingFader(root, variable=DoubleVar(),
label="long name goes here. got it?").pack(side=LEFT, expand=1,
fill=BOTH)
root.mainloop()
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