I've gotten curious about the Tkinter canvas widget now. I haven't had
enough time to really play with it but I do have access to some great
examples. Attached is my favorite example from the /demos/tkinter/matt
directory slightly modified to run on WinCE. Also here is a url where you
can get the demos:
http://weblog.cs.uiowa.edu/python-2.3.1/Demo/tkinter/
Unforunatly I couldn't find a zip/tgz containing all the demos, but they do
have fairly discriptive names so the above should work. It might also be
interesting to go through and adjust these so they will all work on WinCE...
import sys
for p in sys.path:
if p[-12:].lower() == "python23.zip":
sys.path.append(p + "\\lib-tk")
break
from Tkinter import *
# this file demonstrates a more sophisticated movement --
# move dots or create new ones if you click outside the dots
class Test(Frame):
###################################################################
###### Event callbacks for THE CANVAS (not the stuff drawn on it)
###################################################################
def mouseDown(self, event):
# see if we're inside a dot. If we are, it
# gets tagged as CURRENT for free by tk.
if not event.widget.find_withtag(CURRENT):
# there is no dot here, so we can make one,
# and bind some interesting behavior to it.
# ------
# create a dot, and mark it as CURRENT
fred = self.draw.create_oval(
event.x - 10, event.y -10, event.x +10, event.y + 10,
fill="green", tags=CURRENT)
self.draw.tag_bind(fred, "<Any-Enter>", self.mouseEnter)
self.draw.tag_bind(fred, "<Any-Leave>", self.mouseLeave)
self.lastx = event.x
self.lasty = event.y
def mouseMove(self, event):
self.draw.move(CURRENT, event.x - self.lastx, event.y - self.lasty)
self.lastx = event.x
self.lasty = event.y
###################################################################
###### Event callbacks for canvas ITEMS (stuff drawn on the canvas)
###################################################################
def mouseEnter(self, event):
# the CURRENT tag is applied to the object the cursor is over.
# this happens automatically.
self.draw.itemconfig(CURRENT, fill="red")
def mouseLeave(self, event):
# the CURRENT tag is applied to the object the cursor is over.
# this happens automatically.
self.draw.itemconfig(CURRENT, fill="blue")
def createWidgets(self):
self.QUIT = Button(self, text='QUIT', foreground='red',
command=self.quit)
self.QUIT.pack(side=LEFT, fill=BOTH)
self.draw = Canvas(self, width="5i", height="5i")
self.draw.pack(side=LEFT)
Widget.bind(self.draw, "<1>", self.mouseDown)
Widget.bind(self.draw, "<B1-Motion>", self.mouseMove)
def __init__(self, master=None):
Frame.__init__(self, master)
#Pack.config(self)
self.pack()
self.createWidgets()
root = Tk()
sizex, sizey = root.wm_maxsize()
root.wm_geometry("%dx%d+0+%d"%(sizex-6,sizey*37/64+1,sizey/90))
test = Test(root)
root.mainloop()
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