Genau wie wuf hab ich gestern versucht, ein LCD-ähnliches Ding für Tkinter zu programmieren (Zufälle gibts
). Mein Ansatz ist etwas anders, und ich hab gleich ein Tkinter-Widget daraus gemacht. Hier mal die erste pre-pre-Alpha Version:
Code: Alles auswählen
from Tkinter import *
class TkLCD(Canvas):
def __init__(self,master,width=100,height=50,colors=("cyan","blue"),
digits=0,mask=0,**kw):
Canvas.__init__(self,master,kw,width=width,height=height)
# - b
# | | a c
# - g
# | | f d
# - e
# polygon coordinates for height=50
self.shape = {
'a' : [3.0, 5.0, 5.0, 3.0, 7.0, 5.0, 7.0, 15.0, 5.0, 17.0, 3.0, 15.0],
'b' : [6.3, 2.0, 8.5, 0.0, 18.5, 0.0, 20.3, 2.0, 18.1, 4.0, 8.1, 4.0],
'c' : [19.0, 5.0, 21.2, 3.0, 23.0, 5.0, 23.0, 15.0, 21.2, 17.0, 19.0, 15.0],
'd' : [19.0, 21.0, 21.2, 19.0, 23.0, 21.0, 23.0, 31.0, 21.2, 33.0, 19.0, 31.0],
'e' : [6.3, 34.0, 8.5, 32.0, 18.5, 32.0, 20.3, 34.0, 18.1, 36.0, 8.1, 36.0],
'f' : [3.0, 21.0, 5.0, 19.0, 7.0, 21.0, 7.0, 31.0, 5.0, 33.0, 3.0, 31.0],
'g' : [6.3, 18.0, 8.5, 16.0, 18.5, 16.0, 20.3, 18.0, 18.1, 20.0, 8.1, 20.0],
}
factor = 50.0 / height
# scale the shape
for c in self.shape.keys():
self.shape[c] = [x/factor for x in self.shape[c]]
# scale x and y offset
self.delta_x = 24 / factor
self.delta_y = 10 / factor
# we will need those later
self.digits = digits
self.colors = colors
self.mask = mask
# llcd defines a list of segments to turn on for any particular symbol.
self.llcd = {
'0' : ["a","b","c","d","e","f"],
'1' : ["c","d"],
'2' : ["b","c","e","f","g"],
'3' : ["b","c","d","e","g"],
'4' : ["a","c","d","g"],
'5' : ["a","b","d","e","g"],
'6' : ["a","b","d","e","f","g"],
'7' : ["b","c","d"],
'8' : ["a","b","c","d","e","f","g"],
'9' : ["a","b","c","d","e","g"],
'-' : ["g"],
' ' : ''
}
def clear_lcd(self):
self.delete('lcd')
def change_colors(self, new):
self.colors = new
def reset_colors(self):
self.colors = ("cyan","blue")
def display(self, n):
self.update()
self.clear_lcd()
number = [x for x in str(n)][::-1]
if self.mask == 1:
self.__create("8"*self.digits,1)
self.__create(number)
def __create(self,number,mask=None):
if mask:
out,fill = "white","grey"
else:
out,fill = self.colors
w = self.winfo_width()
b = int(self.cget('bd'))
offset = w - self.delta_x - b - 5
for char in number:
for sign in self.llcd[char]:
new = self.shape[sign][:]
for i in range(len(new)):
# x + offset
if i%2==0: new[i] += offset
# y + offset
else: new[i] += self.delta_y+b
self.create_polygon(new,outline=out,fill=fill,tags='lcd')
offset -= self.delta_x
if __name__ == '__main__':
def show_it(event):
number = scale.get()
if number > 0:
lcd2.change_colors(("blue","red"))
lcd3.change_colors(("blue","red"))
else:
lcd2.reset_colors()
lcd3.reset_colors()
lcd2.display(number)
lcd3.display(number)
root = Tk()
lcd1 = TkLCD(root,width=350,height=60,mask=1,digits=11)
lcd1.pack(anchor=E)
lcd1.display(-1234567890)
f = Frame(root,bd=2,relief=GROOVE)
f.pack()
lcd2 = TkLCD(f,height=100)
lcd2.pack(side=LEFT)
scale = Scale(f,orient=HORIZONTAL,from_=-100,to=100,
showvalue=0,length=200,command=show_it)
scale.pack(side=LEFT)
lcd3 = TkLCD(f,digits=4,mask=1)
lcd3.pack(side=RIGHT)
root.mainloop()
Gruß, mawe
.