Files
@ 626aa2179630
Branch filter:
Location: light9/Widgets/FlyingFader.py
626aa2179630
4.3 KiB
text/x-python
some naming and defaults tweaks
some naming and defaults tweaks
interrupted fades now go to the new destination at the same rate they were traveling.
not very cool
some naming and defaults tweaks
interrupted fades now go to the new destination at the same rate they were traveling.
not very cool
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | from Tkinter import *
from time import time
class FlyingFader(Frame):
def __init__(self, master, variable, label, fadedur=1.5, font=('Arial', 8),
**kw):
Frame.__init__(self, master)
self.name = label
self.variable = variable
self.fadedur = fadedur
self.curfade = None
self.fadetimes = 0, 0
self.config({'bd':1, 'relief':'raised'})
scaleopts = {'variable' : variable, 'showvalue' : 0, 'from' : 1.0,
'to' : 0, 'res' : 0.001, 'width' : 20, 'length' : 200}
scaleopts.update(kw)
self.scale = Scale(self, scaleopts)
self.vlabel = Label(self, text="0.0", width=6, 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 / 10.0, 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 isfading(self):
return self.fadetimes[0] or self.fadetimes[1]
def newfade(self, newlevel, evt=None, length=None):
if length is None:
length = self.fadedur
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()
if not self.isfading():
self.fadetimes = (now, now + (mult * length))
self.curfade = (self.variable.get(), newlevel)
else:
# already fading
t1,t2=self.fadetimes
v1,v2=self.curfade
rate = abs((v2-v1)/(t2-t1))
vnow=self.variable.get()
newdist=abs(newlevel-vnow)
newdur=newdist/rate
self.fadetimes = (now,now+newdur)
self.curfade=(vnow,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(30, self.gofade)
def updatelabel(self, *args):
self.vlabel['text'] = "%.3f" % 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()
|