tkinter question

[Eric_Dexter@msn.com]

I saw this (close to this anyway) lieing around on the internet and
was wanting to use it to define a start point exc but I need the
graphics to stay within a set y coords and I am not realy sure how to
do that. I have no idea on how to bind a min/max y to it. (the
concept is inspired by the java csound blue).


#!/usr/bin/python
from Tkinter import *
import csoundroutines as cs


root = Tk()


global canv
xx = {}

def makeFrame(root) :
global canv
test = cs.csdInstrumen tlist3('bay-at-night.csd')
canv = Canvas (root, height = 200, width = 350)

for i in range (0, len(test.instr_ number)):
canv.create_tex t(10, i *10, text=str(test.i nstr_number[i]) +
'...', tags=('movable' ))
xx[i] = canv.tag_bind(' movable', '<B1-Motion>', slide) #B1-motion
is a drag with left button down
canv.pack()


def slide (event):
'''
triggered when something is dragged on the canvas - move thing
under
mouse ('current') to new position
'''
newx = event.x
if event.y < 10 and event.y 0:
newy = event.y
canv.coords('cu rrent', newx, newy)


makeFrame(root)
root.mainloop()

[Chuckk Hubbard]

Re: tkinter question

Hello.
How about this? I changed the if statements so the coordinates are
always updated, but only changed if within the right limits, otherwise
updated to the existing value. Now if you drag outside the limits of
one dimension, it still moves in the other dimension. Not sure if
that's what you want. I'm amazed that this can be so simple, I came
up with an intricate system for my app, not realizing I could bind
events to canvas items!
BTW, I've never come across csoundroutines, can you give me a synopsis
of what it's for? I'm using the Python Csound API. This is why I
commented out all the references to csoundroutines, I don't have it
installed at the moment.
-Chuckk

#!/usr/bin/python
from Tkinter import *
#import csoundroutines as cs


root = Tk()


global canv
xx = {}

def makeFrame(root) :
global canv
# test = cs.csdInstrumen tlist3('bay-at-night.csd')
canv = Canvas (root, height = 200, width = 350)

# for i in range (0, len(test.instr_ number)):
for i in range (0, 4):
# canv.create_tex t(10, i *10, text=str(test.i nstr_number[i]) +
canv.create_tex t(10, i *10, text=str(i) +
'...', tags=('movable' ))
xx[i] = canv.tag_bind(' movable', '<B1-Motion>', slide) #B1-motion
is a drag with left button down
canv.pack()


def slide (event):
'''
triggered when something is dragged on the canvas - move thing
under
mouse ('current') to new position
'''
if 0 < event.x < 200:
newx = event.x
else: newx = canv.coords('cu rrent')[0]
if 0 < event.y < 100:
newy = event.y
else: newy = canv.coords('cu rrent')[1]
canv.coords('cu rrent', newx, newy)


makeFrame(root)
root.mainloop()


On Fri, Oct 3, 2008 at 3:44 PM, Eric_Dexter@msn .com <Eric_Dexter@ms n.comwrote:

I saw this (close to this anyway) lieing around on the internet and
was wanting to use it to define a start point exc but I need the
graphics to stay within a set y coords and I am not realy sure how to
do that. I have no idea on how to bind a min/max y to it. (the
concept is inspired by the java csound blue).
>
>
#!/usr/bin/python
from Tkinter import *
import csoundroutines as cs
>
>
root = Tk()
>
>
global canv
xx = {}
>
def makeFrame(root) :
global canv
test = cs.csdInstrumen tlist3('bay-at-night.csd')
canv = Canvas (root, height = 200, width = 350)
>
for i in range (0, len(test.instr_ number)):
canv.create_tex t(10, i *10, text=str(test.i nstr_number[i]) +
'...', tags=('movable' ))
xx[i] = canv.tag_bind(' movable', '<B1-Motion>', slide) #B1-motion
is a drag with left button down
canv.pack()
>
>
def slide (event):
'''
triggered when something is dragged on the canvas - move thing
under
mouse ('current') to new position
'''
newx = event.x
if event.y < 10 and event.y 0:
newy = event.y
canv.coords('cu rrent', newx, newy)
>
>
makeFrame(root)
root.mainloop()
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>

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