diff options
Diffstat (limited to 'Demo/tkinter/matt/canvas-mult-item-sel.py')
| -rw-r--r-- | Demo/tkinter/matt/canvas-mult-item-sel.py | 119 |
1 files changed, 58 insertions, 61 deletions
diff --git a/Demo/tkinter/matt/canvas-mult-item-sel.py b/Demo/tkinter/matt/canvas-mult-item-sel.py index 2368733..a4f267c 100644 --- a/Demo/tkinter/matt/canvas-mult-item-sel.py +++ b/Demo/tkinter/matt/canvas-mult-item-sel.py @@ -1,6 +1,6 @@ from Tkinter import * -# allows moving dots with multiple selection. +# allows moving dots with multiple selection. SELECTED_COLOR = "red" UNSELECTED_COLOR = "blue" @@ -10,72 +10,69 @@ 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 - - + # 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 + 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) - + # 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) + self.QUIT = Button(self, text='QUIT', foreground='red', + command=self.quit) - def __init__(self, master=None): - Frame.__init__(self, master) - Pack.config(self) - self.createWidgets() + ################ + # 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) -test = Test() -test.mainloop() + # 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() |