--- /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, "<B1-Motion>", 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()