I apologise if I have come to the wrong place here, but 12hrs searching, plus
experimenting, on the WWW for advice on it has not yielded any successful
advice to resolve the issue.
I am am having trouble binding an Entry widget to <Return>
Here is the snippet (butCol is a Frame widget to put buttons,labels and text
entry down LHS)
KS1=StringVar()
KS1.set("Key is ??")
butCol.ks1
=Label(butCol,textvariable=KS1).grid(column=0,row=18,sticky=(N,W))
myKey = [0,2,4,5,7,9,11] #Begin in the key of C
KS2 =StringVar()
KS2.set("C")
butCol.ks2
=Entry(butCol,width=20,textvariable=KS2).grid(column=0,row=19,sticky=(N,W))
The above lines all render correctly, but will not trigger off "entry" of data
at all on <Return>
Adding the following line just crashes.
butCol.ks2.bind("<Return>",chooseKey)
I downloaded the Python 3 package from the recommended site last week to begin
this project (it was previously working OK in Skulptor, but I was not prepared
to develop it any further in that environment, though it was an excellent
starting environment). So I believe the Python language installed is up
todate. I have not previously installed Python so it should be "clean".
If you could give any direct advice I would be very grateful.
One overall observation that has frustrated me is how toi search for
information that relates to Python3 and the latest tkinter modules. I kept
finding old python or old Tkinter or combinations of both. Wrorking my way
through this was very time consuming and rarely productive. Is there any
advice on how to get the "latest" information off the WWW?
Cheers, Rob Ward
PS In my state of eternal optimism I have attached the whole file :-)
PPS I have done some OOP in the past but not keen to jump in at the moment.
from tkinter import *
from tkinter import ttk
def chooseKey(event):
global myKey
global key
ans = KS2.get().lower
keyS="??,E,A,D,G,C,F,Bb,Eb,Ab"
if (ans =="e"): #Key of E, 4 Sharps F,C,G,D
# C D E F G A B
myKey = [1,3,4,6,8,9,11]
keyS="Key: E <F# C# G# D#>"
if (ans =="a"): #Key of A, 3 Sharps F,C,G
myKey = [1,2,4,6,8,9,11]
keyS="Key: A <F# C# G#>"
if (ans =="d"): #key of D, 2 Sharps F,C
myKey = [1,2,4,6,7,9,11]
keyS="Key: D <F# C#>"
if (ans =="g"): #key of G, 1 Sharp F
myKey = [0,2,4,5,7,9,11]
keyS="Key: G <F#>"
if (ans =="c"): #Key of C, root scale
myKey = [0,2,4,5,7,9,11]
keyS="Key: C"
if (ans =="f"): #Key of F, 1 flat B
myKey = [0,2,4,5,7,9,10]
keyS="Key: F <Bb>"
if (ans =="bb"): #Key of Bb, 2 Flats B,E
myKey = [0,2,3,5,7,9,10]
keyS="Key: Bb <Bb Eb>"
if (ans =="ab"): #Key of Eb, 3 Flats B,E,A
myKey = [0,2,3,5,7,8,10]
keyS="Key: Eb <Bb Eb Ab>"
if (ans =="eb"): #Key of Ab, 4 Flats B,E,A,D
myKey = [0,1,3,5,7,8,10]
keyS="Key: Ab <Bb Eb Ab Db>"
loadMidi()
KS1.set(keyS)
#Durations of standard notes
def semiquaver():
print("semiquaver")
global dur
dur = 6
def quaver():
print("quaver")
global dur
dur = 12
def crochet():
print("crochet")
global dur
dur = 24
def semibreve():
print("semibreve")
global dur
dur = 48
def breve():
print("breve")
global dur
dur = 96
def loadMidi():
global myMidi
global myKey
del myMidi[:]
for notes in range(24,106,12): #C1 to C8 in steps of 12
myMidi.append(notes+myKey[0]) #C skip C#,Db
myMidi.append(notes+myKey[1]) #D skip Eb,D#
myMidi.append(notes+myKey[2]) #E half tone
myMidi.append(notes+myKey[3]) #F skip F#, Gb
myMidi.append(notes+myKey[4]) #G skip G#, Ab
myMidi.append(notes+myKey[5]) #A skip Bb
myMidi.append(notes+myKey[6]) #B half tone
#print 'Init loop',myMidi
#This is the handler for mouse click events. Note that it
#must take one parameter, a tuple of the position of the
#mouse click.
def canvas_click(event):
#print ('Mouse x=', event.x," - ",event.y)
global accidental
global aNote
global dotted
global myMidi
aNote = [int((event.x+5)/10)*10,int((event.y+5)/10)*10] #Quantise position,
tuplet for X,Y of current note
Y=int(((785-event.y)/10))
#print ('Y-Coord ',Y)
#print ('Midi = ',myMidi[Y])
dummy =
'"note"'+":["+str(int((aNote[0]-200)/10))+","+str(myMidi[Y]+accidental)+","+str(int(dur*dotted))+"],"
NL1.set(dummy)
#print (dummy)
tune.append(dummy)#Main data list of note information
#Push the Note Grahpic onto a list for redraw and also countback purposes
for erasing notes and bars
noteHist.append(([aNote[0],aNote[1]+10],[aNote[0],aNote[1]-10],[aNote[0]+10*dur*dotted,aNote[1]]))
accidental=0 #reset accidentals
sharpS="Sharpen"
natS="Natural True"
flatS="Flatten"
dotted = 1.0 #reset the dotted effect
dotS="Dotted False"
draw_note(canvas)
def draw_note(canvas):
#Draw the note graphic
canvas.delete("stem","oval1","oval2","flag1","flag2") # remove all items
global dur
global aNote
#Draw history of notes entered
for myNotes in range(0,len(noteHist)): #Nos of subdivisions in a bar
canvas.create_polygon([(noteHist[myNotes][0]), (noteHist[myNotes][1]),
(noteHist[myNotes][2])], width=2, fill="white", tag="noteHist")
#draw where the current note should be
print("duration = ",dur," aNote[",aNote,"]")
canvas.create_oval([aNote[0]-10,aNote[1]-8,aNote[0]+10,aNote[1]+8],
width=3,tag="oval1",outline="black")#Oval filled in white, begin as a breve
if (dur <96):
#Draw a stem in black, all non-breves have a stem
canvas.create_line((aNote[0]+10,aNote[1]), (aNote[0]+10,aNote[1]-60),
width=3, fill="black",tag="stem")
if (dur <48):
#All notes less than sem-breve are filled with black
canvas.create_oval([aNote[0]-10,aNote[1]-8,aNote[0]+10,aNote[1]+8],width=0,
fill="black",tag="oval2")#Oval empty
if (dur <24):
#add one flag for a Quaver
canvas.create_line((aNote[0]+10,aNote[1]-60), (aNote[0]+30,aNote[1]-45),
width=3, fill="black", tag="flag1")
if (dur<12):
#add second line for a semi quaver
canvas.create_line((aNote[0]+10,aNote[1]-45), (aNote[0]+30,aNote[1]-30),
width=3, fill="black",tag="flag2")
def draw_handler(canvas):
#Draw the titles on the canvas
canvas.create_text((20, 400),text="Treble Clef", anchor="nw")
canvas.create_text( (20, 520),text="Bass Clef",anchor="nw")
canvas.create_text( (80, 50),text="Scheduler+Midi",anchor="nw")
#draw the timing lines
for lines in range(200,1180,20): #Nos of subdivisions in a bar
lwidth = 1
if (lines+40)%60 == 0:
lwidth =2
if (lines+40)%240 == 0:
lwidth =3
canvas.create_line((lines,280),(lines,680),width=lwidth,fill="yellow")
#above treble cleff
canvas.create_line((200, 300), (1160, 300), width=1,fill="blue")
canvas.create_line((200, 320), (1160, 320), width=1, fill="blue")
canvas.create_line((200, 340), (1160, 340), width=1, fill="blue")
canvas.create_line((200, 360), (1160, 360), width=1, fill="blue")
canvas.create_line((200, 380), (1160, 380), width=1, fill="blue")
# Treble Clef Lines
canvas.create_line((100, 400), (1180, 400), width=3, fill="black")
canvas.create_line((100, 420), (1180, 420), width=3, fill="black")
canvas.create_line((100, 440), (1180, 440), width=3, fill="black")
canvas.create_line((100, 460), (1180, 460), width=3, fill="black")
canvas.create_line((100, 480), (1180, 480), width=3, fill="black")
#middle "c"
canvas.create_line((200, 500), (1160, 500), width=1, fill="blue")
# Bass Clef Lines
canvas.create_line((100, 520), (1180, 520), width=3, fill="black")
canvas.create_line((100, 540), (1180, 540), width=3, fill="black")
canvas.create_line((100, 560), (1180, 560), width=3, fill="black")
canvas.create_line((100, 580), (1180, 580), width=3, fill="black")
canvas.create_line((100, 600), (1180, 600), width=3, fill="black")
#below the Bass Cleff
canvas.create_line((200, 620), (1160, 620), width=1, fill="blue")
canvas.create_line((200, 640), (1160, 640), width=1, fill="blue")
canvas.create_line((200, 660), (1160, 660), width=1, fill="blue")
#canvas.create_image(self.image, image_center, image_size,
pos, image_size)
#84 across by 232 Tcleff.png
tcleff = PhotoImage(file="Tcleff.gif")
canvas.create_image(110,390,image=tcleff, anchor="nw")
#80 across by 97 Bcleff.png
bcleff = PhotoImage(file="Bcleff.gif")
canvas.create_image(110,523,image=bcleff,anchor="nw" )
draw_note(canvas)
#core Bar editting
def clearBar():
global bar
BN1.set("Bar Cleared:"+str(bar))
if(len(noteHist)>0):
for myNotes in range(0,len(noteHist)):
noteHist.pop(len(noteHist)-1)
tune.pop(len(tune)-1)
def incBar():
global bar
global noteHist
bar=bar+1
#print ('"bar":',str(bar))
tune.append('"bars"'+":"+str(bar)+",")
noteHist=[] #clear the graphics for the next bar
BN1.set('Bar Selected:'+str(bar))
def decBar():
global bar
if (bar>1): #No negative bars please!!!
bar=bar-1
#print('"bar":',str(bar))
BN1.set('Bar Selected:'+str(bar))
def erase(): #Erase the last entered note
if (len(noteHist)>0):#only if the current bar has any history (left?)
tune.pop(len(tune)-1)#removes notes off the main tune list
noteHist.pop(len(noteHist)-1)#removes notes from previous history of
current bar
#Control Accidentals
def sharpen():
global accidental
accidental = 1
AS1.set("Sharpen True")
AS2.set("Natural")
AS3.set("Flatten")
def natural():
global accidental
accidental=0
AS1.set("Sharpen")
AS2.set("Natural True")
AS3.set("Flatten")
def flatten():
global accidental
accidental = -1
AS1.set("Sharpen")
AS2.set("Natural")
AS3.set("Flatten True")
def dot():
global dotted
if (dotted==1.5):
dotted = 1.0
DS1.set("Dotted False")
else:
dotted = 1.5
DS1.set("Dotted True")
#Other functions
def chooseInstrument(temp):
global instrument
IN1.set("Instrument= "+IN2.get())
instrument=int(IN2.get())
def save():
midiWhole.append('"midi":'+str(instrument)+',')
midiWhole.extend(tune)
for myData in range(0,len(midiWhole)): #Nos of subdivisions in a bar
print (midiWhole[myData])
#*****************************************
#******* START OF MAIN PROGRAM *******
#*****************************************
frame = Tk() #Establish main Frame
graphic = Frame(frame) #Master sub-Frame
graphic.grid()#Establish the Layout manager
butCol = Frame(graphic,width=120,height=750)# A sub-sub-Frame to hold all the
buttons down the LHS
canvas = Canvas(graphic,width=1200,height=750,bg='gray')#sub-sub-frame should
allow us to draw inside the frame 'graphic'?
#How to organise widgets within the grid
butCol.grid(column=1, row=1) #Down LHS
butCol.grid(sticky=(N, E, W), pady=5, padx=5 )
canvas.grid(column=2, row=1, sticky=(N, W, E, S)) #Rest of space the RHS
print("Layout widgets and plan established")
#Establish major lists and variables
tune = []
noteHist = []
midiWhole=[]
#Note presets
dur=0 #Length of a note
barNosS = "1"
barNos=str(barNosS)
myKey =[]
myMidi =[]
aNote = [200,500] #Middle C to begin with
noteFill = 'black'
bar = 1 #just to kick the bar nos off :-)
dur =24 #default Crochet note length
accidental = 0
dotted = 1.0 #the multiplier for 'dot'ing 1 = off, 1.5 = on
sharpS="Sharpen"
natS="Natural True"
flatS="Flatten"
dotted = 1.0 #reset the dotted effect
dotS="Dotted False"
print ("Globals established")
#draw the teble and bass cleff stave graphics on the canvas
draw_handler(canvas)
#define/draw the GUI elements to control editting
canvas.bind('<Button-1>', canvas_click)
#frame.bind('<Return>', frame.search)
nameLbl =Label (butCol,text="Scheduler+Midi V1.7").grid(column=0, row=0,
sticky=(N,W))
label1 =Label (butCol,text="Note Selection:??").grid(column=0, row=1,
sticky=(N,W))
semiQaver =Button(butCol,text="SemiQuaver 6",
command=semiquaver).grid(column=0, row=2, sticky=(N,W))
Quaver =Button(butCol,text="Quaver 12", command=quaver).grid(column=0,
row=3, sticky=(N,W))
Crochet =Button(butCol,text="Crochet 24",
command=crochet).grid(column=0,row=4, sticky=(N,W))
Semibreve =Button(butCol,text="SemiBreve 48", command=semibreve).grid(column=0,
row=5, sticky=(N,W))
Breve =Button(butCol,text="Breve 96", command=breve).grid(column=0, row=6,
sticky=(N,W))
DS1 = StringVar()#Creates a special tkinter variable
DS1.set("Dotted False")
Dot
=Button(butCol,command=dot,textvariable=DS1).grid(column=0,row=7,sticky=(N,W))
Erase =Button(butCol,text="Erase last Note", command=erase).grid(column=0,
row=8, sticky=(N,W))
label2 =Label(butCol,text="Accidentals: ").grid(column=0, row=9,
sticky=(N,W))
AS1 = StringVar()
AS1.set("Sharpen")
as1 =Button(butCol, command=sharpen,textvariable=AS1).grid(column=0,
row=10, sticky=(N,W))
AS2 = StringVar()
AS2.set("Natural")
as2 =Button(butCol,text="Natural",
command=natural,textvariable=AS2).grid(column=0, row=12, sticky=(N,W))
AS3 = StringVar()
AS3.set("Flatten")
as3 =Button(butCol,text="Flatten",
command=flatten,textvariable=AS3).grid(column=0, row=13, sticky=(N,W))
BN1 = StringVar()
BN1.set("Bar Selected:"+str(barNos))
BarNos1 =Label(butCol,textvariable= BN1).grid(column=0,row=14,sticky=(N,W))
Incbar =Button(butCol,text="IncBar & Clear",
command=incBar).grid(column=0,row=15,sticky=(N,W))
Decbar =Button(butCol,text="Dec Bar",
command=decBar).grid(column=0,row=16,sticky=(N,W))
Clearbar =Button(butCol,text="Clear Bar",
command=clearBar).grid(column=0,row=17,sticky=(N,W))
KS1=StringVar()
KS1.set("Key is ??")
butCol.ks1
=Label(butCol,textvariable=KS1).grid(column=0,row=18,sticky=(N,W))
myKey = [0,2,4,5,7,9,11] #Begin in the key of C
KS2 =StringVar()
KS2.set("C")
butCol.ks2
=Entry(butCol,width=20,textvariable=KS2).grid(column=0,row=19,sticky=(N,W))
#butCol.ks2.bind("<Return>",chooseKey)
ks2.bind("Return", lambda event: w.focus_set())
IN1 =StringVar()
IN1.set("Instrument is ??")
in1 =Label(butCol,textvariable=IN1).grid(column=0,row=20,sticky=(N,W))
IN2 =StringVar()
in2 =Entry(butCol,textvariable=IN2).grid(column=0,row=21,sticky=(N,W))
#in2.bind('<Return>',butCol.search)
Save =Button(butCol,text="Dump to Debug",
command=save).grid(column=0,row=22,sticky=(N,W))
NL1 =StringVar()
NL1.set("Note entered:")
nl1 =Label (butCol,textvariable=NL1).grid(column=0,row=23,sticky=(N,W))
print("Widgets established")
key='C'
instrumentS = "1" #Variable to interact with the entry widget
instrument = int(instrumentS)
#Establish midi note lookup list for a particular key
#print('myKey = ',myKey)
loadMidi()
#print("myMidi = ",myMidi)
#print("aNote = ",aNote)
print("Begin Event driven GUI")
frame.mainloop()
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