diff options
Diffstat (limited to 'Demo/tkinter/matt/canvas-moving-or-creating.py')
| -rw-r--r-- | Demo/tkinter/matt/canvas-moving-or-creating.py | 73 |
1 files changed, 35 insertions, 38 deletions
diff --git a/Demo/tkinter/matt/canvas-moving-or-creating.py b/Demo/tkinter/matt/canvas-moving-or-creating.py index 74729a6..5327c08 100644 --- a/Demo/tkinter/matt/canvas-moving-or-creating.py +++ b/Demo/tkinter/matt/canvas-moving-or-creating.py @@ -1,6 +1,6 @@ from Tkinter import * -# this file demonstrates a more sophisticated movement -- +# this file demonstrates a more sophisticated movement -- # move dots or create new ones if you click outside the dots class Test(Frame): @@ -8,58 +8,55 @@ 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 + # 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 + 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") + # 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") + # 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) + 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) + 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() + Frame.__init__(self, master) + Pack.config(self) + self.createWidgets() test = Test() test.mainloop() - - - |