diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Demo/tkinter/matt/canvas-mult-item-sel.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/tkinter/matt/canvas-mult-item-sel.py Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,78 @@ +from Tkinter import * + +# allows moving dots with multiple selection. + +SELECTED_COLOR = "red" +UNSELECTED_COLOR = "blue" + +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): + # we clicked outside of all dots on the canvas. unselect all. + + # re-color everything back to an unselected color + self.draw.itemconfig("selected", fill=UNSELECTED_COLOR) + # unselect everything + self.draw.dtag("selected") + else: + # mark as "selected" the thing the cursor is under + self.draw.addtag("selected", "withtag", CURRENT) + # color it as selected + self.draw.itemconfig("selected", fill=SELECTED_COLOR) + + self.lastx = event.x + self.lasty = event.y + + + def mouseMove(self, event): + self.draw.move("selected", event.x - self.lastx, event.y - self.lasty) + self.lastx = event.x + self.lasty = event.y + + def makeNewDot(self): + # create a dot, and mark it as current + fred = self.draw.create_oval(0, 0, 20, 20, + fill=SELECTED_COLOR, tags=CURRENT) + # and make it selected + self.draw.addtag("selected", "withtag", CURRENT) + + def createWidgets(self): + self.QUIT = Button(self, text='QUIT', foreground='red', + command=self.quit) + + ################ + # make the canvas and bind some behavior to it + ################ + self.draw = Canvas(self, width="5i", height="5i") + Widget.bind(self.draw, "<1>", self.mouseDown) + Widget.bind(self.draw, "", self.mouseMove) + + # and other things..... + self.button = Button(self, text="make a new dot", foreground="blue", + command=self.makeNewDot) + + message = ("%s dots are selected and can be dragged.\n" + "%s are not selected.\n" + "Click in a dot to select it.\n" + "Click on empty space to deselect all dots." + ) % (SELECTED_COLOR, UNSELECTED_COLOR) + self.label = Message(self, width="5i", text=message) + + self.QUIT.pack(side=BOTTOM, fill=BOTH) + self.label.pack(side=BOTTOM, fill=X, expand=1) + self.button.pack(side=BOTTOM, fill=X) + self.draw.pack(side=LEFT) + + def __init__(self, master=None): + Frame.__init__(self, master) + Pack.config(self) + self.createWidgets() + +test = Test() +test.mainloop()