71 lines
2.2 KiB
Python
71 lines
2.2 KiB
Python
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", "tag" : "current"})
|
|
|
|
self.draw.bind(fred, "<Any-Enter>", self.mouseEnter)
|
|
self.draw.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',
|
|
'fg': '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.createWidgets()
|
|
|
|
test = Test()
|
|
test.mainloop()
|
|
|
|
|
|
|