| from Tkinter import * |
| |
| class Test(Frame): |
| def printit(self): |
| print "hi" |
| |
| def createWidgets(self): |
| self.QUIT = Button(self, text='QUIT', |
| background='red', |
| foreground='white', |
| height=3, |
| command=self.quit) |
| self.QUIT.pack(side=BOTTOM, fill=BOTH) |
| |
| self.canvasObject = Canvas(self, width="5i", height="5i") |
| self.canvasObject.pack(side=LEFT) |
| |
| def mouseDown(self, event): |
| # canvas x and y take the screen coords from the event and translate |
| # them into the coordinate system of the canvas object |
| self.startx = self.canvasObject.canvasx(event.x) |
| self.starty = self.canvasObject.canvasy(event.y) |
| |
| def mouseMotion(self, event): |
| # canvas x and y take the screen coords from the event and translate |
| # them into the coordinate system of the canvas object |
| x = self.canvasObject.canvasx(event.x) |
| y = self.canvasObject.canvasy(event.y) |
| |
| if (self.startx != event.x) and (self.starty != event.y) : |
| self.canvasObject.delete(self.rubberbandBox) |
| self.rubberbandBox = self.canvasObject.create_rectangle( |
| self.startx, self.starty, x, y) |
| # this flushes the output, making sure that |
| # the rectangle makes it to the screen |
| # before the next event is handled |
| self.update_idletasks() |
| |
| def mouseUp(self, event): |
| self.canvasObject.delete(self.rubberbandBox) |
| |
| def __init__(self, master=None): |
| Frame.__init__(self, master) |
| Pack.config(self) |
| self.createWidgets() |
| |
| # this is a "tagOrId" for the rectangle we draw on the canvas |
| self.rubberbandBox = None |
| |
| # and the bindings that make it work.. |
| Widget.bind(self.canvasObject, "<Button-1>", self.mouseDown) |
| Widget.bind(self.canvasObject, "<Button1-Motion>", self.mouseMotion) |
| Widget.bind(self.canvasObject, "<Button1-ButtonRelease>", self.mouseUp) |
| |
| |
| test = Test() |
| |
| test.mainloop() |
