7-Segment Grossanzeige
Verfasst: Donnerstag 23. Dezember 2004, 00:25
Hallo Tkinter Freunde
Habe mich einmal näher mit dem Canvas-Polygon
Grafikobjekt von Tkinter beschäftigt. Als Out-
put entstand dieser Prototyp. Eine skalierbare
7-Segment Grossanzeige.
Ein idealer Baustein für Uhrenmacher und Zähler-
bauer.
Slogan: Python & Tkinter are very good companions!
Gruss wuf 
Habe mich einmal näher mit dem Canvas-Polygon
Grafikobjekt von Tkinter beschäftigt. Als Out-
put entstand dieser Prototyp. Eine skalierbare
7-Segment Grossanzeige.
Ein idealer Baustein für Uhrenmacher und Zähler-
bauer.
Slogan: Python & Tkinter are very good companions!
Code: Alles auswählen
#!/usr/bin/env python
# -*- coding: UTF-8 -*-
# Skriptname : fwsSingle7SegDisplay0101.py
# Version : 1.01
# Autor : wuf @ german Python-Forum
# Datum : 12.12.2004
# Geändert : 12.12.2004
# Plattform : OS :SuSE91
# Editor :KWrite
# Debugger :Bash-Shell
# Sprache :Python 2.3.3
# GUI :Tkinter
from Tkinter import*
from math import*
from copy import*
class Digit:
def __init__(self,xpos=0.0,ypos=0.0,factor=10.0,color='red',stipple=''):
#~~ Buffer for Polypoints
self.segmentobj = []
self.points = None
self.polypoints = []
self.coordsegment = []
self.coordpoints = {}
self.segmentkeys = ('A','B','C','D','E','F','G')
self.xp = xpos
self.yp = ypos
self.fill = color
self.stipple = stipple
self.outline = platform['bg']
self.gap = 2
self.factor = factor
self.curval = None
#~~ Koordinaten für die Segmentplatzierung
#~~ Für Segment-A
self.xpos = self.xp + self.gap
self.ypos = self.yp
self.coordsegment = [[self.xpos,self.ypos]]
#~~ Für Segment-B
self.xpos = self.xp + (self.factor * 10.0)-(self.factor * 2.0)+ self.gap*2
self.ypos = self.yp + self.gap
self.coordsegment += [[self.xpos,self.ypos]]
#~~ Für Segment-C
self.xpos = self.xp + (self.factor * 10.0)-(self.factor * 2.0)+self.gap*2
self.ypos = self.yp + (self.factor * 10.0)+(self.factor * 0.0) + self.gap*3
self.coordsegment += [[self.xpos,self.ypos]]
#~~ Für Segment-D
self.xpos = self.xp + self.gap
self.ypos = self.yp + (self.factor * 20.0)-(self.factor * 2.0) + self.gap*4
self.coordsegment += [[self.xpos,self.ypos]]
#~~ Für Segment-E
self.xpos = self.xp
self.ypos = self.yp + (self.factor * 10.0)+ self.gap*3
self.coordsegment += [[self.xpos,self.ypos]]
#~~ Für Segment-F
self.xpos = self.xp
self.ypos = self.yp + self.gap
self.coordsegment += [[self.xpos,self.ypos]]
#~~ Für Segment-G
self.xpos = self.xp + self.gap
self.ypos = self.yp + (self.factor * 10.0)-(self.factor * 1.0) + self.gap*2
self.coordsegment += [[self.xpos,self.ypos]]
#~~ Segment-Pattern für die Nummern 0-9
self.segmentmask = [[1,1,1,1,1,1,0], # 0
[0,1,1,0,0,0,0], # 1
[1,1,0,1,1,0,1], # 2
[1,1,1,1,0,0,1], # 3
[0,1,1,0,0,1,1], # 4
[1,0,1,1,0,1,1], # 5
[1,0,1,1,1,1,1], # 6
[1,1,1,0,0,0,0], # 7
[1,1,1,1,1,1,1], # 8
[1,1,1,1,0,1,1], # 9
]
#~~ Koordinatenpunkte für die Segmente A-G
self.coordpoints = {'A': [[0.0 ,0.0 ,1], # Polygon-Eckpunkte Segment-A
[10.0,0.0 ,2],
[8.0 ,2.0 ,3],
[2.0 ,2.0 ,3],
[0.0 ,0.0 ,1],
],
'B': [[0.0 ,2.0 ,4], # Polygon-Eckpunkte Segment-B
[2.0 ,0.0 ,5],
[2.0 ,10.0,3],
[0.0 ,9.0 ,4],
[0.0 ,2.0 ,4],
],
'C': [[0.0 ,1.0 ,4], # Polygon-Eckpunkte Segment-C
[2.0 ,0.0 ,5],
[2.0 ,10.0,3],
[0.0 ,8.0 ,4],
[0.0 ,2.0 ,4],
],
'D': [[2.0 ,0.0 ,5], # Polygon-Eckpunkte Segment-D
[8.0 ,0.0 ,5],
[10.0,2.0 ,3],
[0.0 ,2.0 ,4],
[2.0 ,0.0 ,5],
],
'E': [[0.0 ,0.0 ,1], # Polygon-Eckpunkte Segment-E
[0.0 ,10.0,4],
[2.0 ,8.0 ,3],
[2.0 ,1.0 ,3],
[0.0 ,0.0 ,1],
],
'F': [[0.0 ,0.0 ,1], # Polygon-Eckpunkte Segment-F
[0.0 ,10.0,4],
[2.0 ,9.0 ,3],
[2.0 ,2.0 ,3],
[0.0 ,0.0 ,1],
],
'G': [[0.0 ,1.0 ,4], # Polygon-Eckpunkte Segment-G
[2.0 ,0.0 ,2],
[8.0 ,0.0 ,2],
[10.0,1.0 ,3],
[8.0 ,2.0 ,3],
[2.0 ,2.0 ,3],
[0.0 ,1.0 ,4],
]
}
#~~ Platziere Segmente
for segnum,segkey in enumerate(self.segmentkeys):
self.xpos,self.ypos = self.coordsegment[segnum]
self.points = deepcopy(self.coordpoints[segkey])
self.DrawSegment(segkey)
self.ShowNumber(0)
def DrawSegment(self,segkey):
self.polypoints = []
for segment in self.coordpoints[segkey]:
self.points = deepcopy(segment)
for x,y,scale in [self.points]:
if scale == 1:
x += self.xpos
y += self.ypos
if scale == 2:
x *= self.factor
x += self.xpos
y += self.ypos
if scale == 3:
x *= self.factor
x += self.xpos
y *= self.factor
y += self.ypos
if scale == 4:
x += self.xpos
y *= self.factor
y += self.ypos
if scale == 5:
x *= self.factor
x += self.xpos
y += self.ypos
#~~ Schreibt die modifizierten Punkte
# in die Segmentliste zurück
self.points[0] = x
self.points[1] = y
#~~ Erzeugt Liste mit Poly-Koordinatenpunkte
self.polypoints += [self.points[0:2]]
self.segmentobj.append(platform.create_polygon(self.polypoints,
fill=self.fill,
outline=self.outline,
stipple=self.stipple
))
def ShowNumber(self,number):
if self.curval == number:
return
self.curval = number
mask = self.segmentmask[number]
for segnum,segflag in enumerate(mask):
if segflag:
platform.itemconfigure(self.segmentobj[segnum],fill=self.fill,stipple=self.stipple)
else:
#platform.itemconfigure(self.segmentobj[segnum],fill=platform['bg'])
platform.itemconfigure(self.segmentobj[segnum],fill=self.fill,stipple='gray12')
def UpdateSegmentColor(self):
mask = self.segmentmask[self.curval]
for segnum,segflag in enumerate(mask):
if segflag:
platform.itemconfigure(self.segmentobj[segnum],fill=self.fill,stipple=self.stipple)
else:
#platform.itemconfigure(self.segmentobj[segnum],fill=platform['bg'])
platform.itemconfigure(self.segmentobj[segnum],fill=self.fill,stipple='gray12')
class SegDisplay0101(Digit):
def __init__(self,xpos=30.0,ypos=30.0,factor=10,color='red',stipple=''):
#~~ Initialisierung
Digit.__init__(self,xpos,ypos,factor,color,stipple)
#**********************************************
#* Test der 7-Segment-Anzeige
#**********************************************
def CountNumber():
global counter
#~~ Zählintervall
strvalue = str(counter)
maxnum = len(strvalue)
digptr = 0
for num in xrange(maxnum,0,-1):
number = int(strvalue[num-1])
digits[digptr].stipple = ''
digits[digptr].ShowNumber(number)
digptr += 1
if counter < 9:
counter += 1
else:
counter = 0
platform.after(reptime,CountNumber)
def ChangeSegmentColor(event,obj):
#~~ Ändert Segmentfarbe
digits[0].fill = fgcolor[obj]
digits[0].UpdateSegmentColor()
def ChangeBoxEnter(event):
#~~ Ändert Kursor-Symbol von Pfeil in Hand um,
# wenn sich die Maus in die Farbauswahlbox
# bewegt.
cursor = platform['cursor']
platform['cursor'] = 'hand1'
def ChangeBoxLeave(event):
#~~ Ändert Kursor-Symbol von Hand in Pfeil um,
# wenn sich die Maus aus der Farbauswahlbox
# bewegt.
platform['cursor'] = root['cursor']
if __name__ == "__main__":
root = Tk()
root.title('7-Seg-Display')
counter = 0 # Zähler
digits = [] # Digit-Objektliste
factor = 20 # Segmentgrösse
digitcolor = 'steelblue3' # Segmentfarbe
reptime = 500 # Zählintervall (ms)
#~~ Symbol: Schraube im base64-Format
# GIF-Datei wurde mit Modul base64.py kodiert
# Kommandozeile in Bash-Shell: python base64.py Schraube.gif
# Die Ausgabe der in das base64-Format kodierte Datei Schraube.gif er-
# folgt in die Bash-Shell. Dann manuell von der Bash-Shell in dieses Script
# unter variable data kopiert
schraube=PhotoImage(
data='R0lGODlhEQASAPcAAAAAAIuLi6ysrMDAwObm5v8A/wAAAAICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC'\
'AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgAAACH5BAkIAAUALAAAAAARABIA'\
'AAhqAAsIHEiwoMGDCAkCWLgwYYGFBCJGbGgQgMSLFgEUtBhxgMcBHAloHMjxI0iJFB92/BgSgMeR'\
'Fk22ZCkw5kuUHwXAZIkz586TE00K0ElypskAI2v2/BgA6UaRR5smVQigqdWUBxlidZgwIAA7')
#~~ Anzeigerahmen
clockframe = Frame(root,relief='raised',bd=8,bg='gray',highlightbackground='black',highlightthickness=1)
clockframe.pack(fill=BOTH,expand=YES)
#~~ Canvas für die Aufnahme des 7-Seg-Digit
platform = Canvas(clockframe,
bg='black',
relief='ridge',
bd=8,
highlightthickness=0,
)
platform.pack(padx=20,pady=40,fill=BOTH)
platform['width'] = 285
platform['height'] = 500
root.update_idletasks()
#~~ Zentriert das Root-Fenster
width,height,left,top = tuple(map(int,root.winfo_geometry().replace("x","+").split("+")))
xpos = (root.winfo_screenwidth()-width)/2
ypos = (root.winfo_screenheight()-height)/2
root.wm_geometry("+%d+%d" % (xpos,ypos))
root.update_idletasks()
#~~ Platziert Schrauben
width,height,left,top = tuple(map(int,platform.winfo_geometry().replace("x","+").split("+")))
platform.create_image(20,20, image=schraube)
platform.create_image(20,height-20, image=schraube)
platform.create_image(width-20,20, image=schraube)
platform.create_image(width-20,height-20, image=schraube)
platform.create_text(65,height-35,anchor=SW,text='Powered by Python & Tkinter',fill='white')
#~~ Farbauswahlliste: Kann durch eigene Farben ergänzt oder
# erweitert verden.
fgcolor = ['red','lightsalmon1','green','blue','steelblue3','yellow','white']
xposptr = 0
fgobj = []
#~~ Erzeuge Farbauswahl-Schaltflächen
for box in xrange(len(fgcolor)):
x1 = 40+xposptr
y1 = height-25
object = platform.create_rectangle(x1,y1,x1+10,y1+10,fill=fgcolor[box],stipple='gray50')
platform.tag_bind(object,"<Button-1>",lambda e,obj=box:ChangeSegmentColor(e,obj))
platform.tag_bind(object,"<Enter>" ,ChangeBoxEnter)
platform.tag_bind(object,"<Leave>" ,ChangeBoxLeave)
fgobj.append(object)
xposptr += 15
#~~ Erzeuge Digit-Objekt
digits.append(SegDisplay0101(xpos = 50,
ypos = 40.0,
factor = factor,
color = digitcolor,
stipple = ''
))
CountNumber()
root = mainloop()