diff options
Diffstat (limited to 'Demo/tkinter/guido/canvasevents.py')
| -rw-r--r-- | Demo/tkinter/guido/canvasevents.py | 230 |
1 files changed, 115 insertions, 115 deletions
diff --git a/Demo/tkinter/guido/canvasevents.py b/Demo/tkinter/guido/canvasevents.py index 60f409659b..74ed76f61b 100644 --- a/Demo/tkinter/guido/canvasevents.py +++ b/Demo/tkinter/guido/canvasevents.py @@ -9,7 +9,7 @@ from Canvas import Oval, Group, CanvasText class Group(Group): def bind(self, sequence=None, command=None): - return self.canvas.tag_bind(self.id, sequence, command) + return self.canvas.tag_bind(self.id, sequence, command) class Object: @@ -33,45 +33,45 @@ class Object: """ def __init__(self, canvas, x=0, y=0, fill='red', text='object'): - self.canvas = canvas - self.x = x - self.y = y - self.pile = None - self.group = Group(self.canvas) - self.createitems(fill, text) + self.canvas = canvas + self.x = x + self.y = y + self.pile = None + self.group = Group(self.canvas) + self.createitems(fill, text) def __str__(self): - return str(self.group) + return str(self.group) def createitems(self, fill, text): - self.__oval = Oval(self.canvas, - self.x-20, self.y-10, self.x+20, self.y+10, - fill=fill, width=3) - self.group.addtag_withtag(self.__oval) - self.__text = CanvasText(self.canvas, - self.x, self.y, text=text) - self.group.addtag_withtag(self.__text) + self.__oval = Oval(self.canvas, + self.x-20, self.y-10, self.x+20, self.y+10, + fill=fill, width=3) + self.group.addtag_withtag(self.__oval) + self.__text = CanvasText(self.canvas, + self.x, self.y, text=text) + self.group.addtag_withtag(self.__text) def moveby(self, dx, dy): - if dx == dy == 0: - return - self.group.move(dx, dy) - self.x = self.x + dx - self.y = self.y + dy + if dx == dy == 0: + return + self.group.move(dx, dy) + self.x = self.x + dx + self.y = self.y + dy def moveto(self, x, y): - self.moveby(x - self.x, y - self.y) + self.moveby(x - self.x, y - self.y) def transfer(self, pile): - if self.pile: - self.pile.delete(self) - self.pile = None - self.pile = pile - if self.pile: - self.pile.add(self) + if self.pile: + self.pile.delete(self) + self.pile = None + self.pile = pile + if self.pile: + self.pile.add(self) def tkraise(self): - self.group.tkraise() + self.group.tkraise() class Bottom(Object): @@ -79,10 +79,10 @@ class Bottom(Object): """An object to serve as the bottom of a pile.""" def createitems(self, *args): - self.__oval = Oval(self.canvas, - self.x-20, self.y-10, self.x+20, self.y+10, - fill='gray', outline='') - self.group.addtag_withtag(self.__oval) + self.__oval = Oval(self.canvas, + self.x-20, self.y-10, self.x+20, self.y+10, + fill='gray', outline='') + self.group.addtag_withtag(self.__oval) class Pile: @@ -90,86 +90,86 @@ class Pile: """A group of graphical objects.""" def __init__(self, canvas, x, y, tag=None): - self.canvas = canvas - self.x = x - self.y = y - self.objects = [] - self.bottom = Bottom(self.canvas, self.x, self.y) - self.group = Group(self.canvas, tag=tag) - self.group.addtag_withtag(self.bottom.group) - self.bindhandlers() + self.canvas = canvas + self.x = x + self.y = y + self.objects = [] + self.bottom = Bottom(self.canvas, self.x, self.y) + self.group = Group(self.canvas, tag=tag) + self.group.addtag_withtag(self.bottom.group) + self.bindhandlers() def bindhandlers(self): - self.group.bind('<1>', self.clickhandler) - self.group.bind('<Double-1>', self.doubleclickhandler) + self.group.bind('<1>', self.clickhandler) + self.group.bind('<Double-1>', self.doubleclickhandler) def add(self, object): - self.objects.append(object) - self.group.addtag_withtag(object.group) - self.position(object) + self.objects.append(object) + self.group.addtag_withtag(object.group) + self.position(object) def delete(self, object): - object.group.dtag(self.group) - self.objects.remove(object) + object.group.dtag(self.group) + self.objects.remove(object) def position(self, object): - object.tkraise() - i = self.objects.index(object) - object.moveto(self.x + i*4, self.y + i*8) + object.tkraise() + i = self.objects.index(object) + object.moveto(self.x + i*4, self.y + i*8) def clickhandler(self, event): - pass + pass def doubleclickhandler(self, event): - pass + pass class MovingPile(Pile): def bindhandlers(self): - Pile.bindhandlers(self) - self.group.bind('<B1-Motion>', self.motionhandler) - self.group.bind('<ButtonRelease-1>', self.releasehandler) + Pile.bindhandlers(self) + self.group.bind('<B1-Motion>', self.motionhandler) + self.group.bind('<ButtonRelease-1>', self.releasehandler) movethis = None def clickhandler(self, event): - tags = self.canvas.gettags('current') - for i in range(len(self.objects)): - o = self.objects[i] - if o.group.tag in tags: - break - else: - self.movethis = None - return - self.movethis = self.objects[i:] - for o in self.movethis: - o.tkraise() - self.lastx = event.x - self.lasty = event.y + tags = self.canvas.gettags('current') + for i in range(len(self.objects)): + o = self.objects[i] + if o.group.tag in tags: + break + else: + self.movethis = None + return + self.movethis = self.objects[i:] + for o in self.movethis: + o.tkraise() + self.lastx = event.x + self.lasty = event.y doubleclickhandler = clickhandler def motionhandler(self, event): - if not self.movethis: - return - dx = event.x - self.lastx - dy = event.y - self.lasty - self.lastx = event.x - self.lasty = event.y - for o in self.movethis: - o.moveby(dx, dy) + if not self.movethis: + return + dx = event.x - self.lastx + dy = event.y - self.lasty + self.lastx = event.x + self.lasty = event.y + for o in self.movethis: + o.moveby(dx, dy) def releasehandler(self, event): - objects = self.movethis - if not objects: - return - self.movethis = None - self.finishmove(objects) + objects = self.movethis + if not objects: + return + self.movethis = None + self.finishmove(objects) def finishmove(self, objects): - for o in objects: - self.position(o) + for o in objects: + self.position(o) class Pile1(MovingPile): @@ -179,29 +179,29 @@ class Pile1(MovingPile): tag = 'p1' def __init__(self, demo): - self.demo = demo - MovingPile.__init__(self, self.demo.canvas, self.x, self.y, self.tag) + self.demo = demo + MovingPile.__init__(self, self.demo.canvas, self.x, self.y, self.tag) def doubleclickhandler(self, event): - try: - o = self.objects[-1] - except IndexError: - return - o.transfer(self.other()) - MovingPile.doubleclickhandler(self, event) + try: + o = self.objects[-1] + except IndexError: + return + o.transfer(self.other()) + MovingPile.doubleclickhandler(self, event) def other(self): - return self.demo.p2 + return self.demo.p2 def finishmove(self, objects): - o = objects[0] - p = self.other() - x, y = o.x, o.y - if (x-p.x)**2 + (y-p.y)**2 < (x-self.x)**2 + (y-self.y)**2: - for o in objects: - o.transfer(p) - else: - MovingPile.finishmove(self, objects) + o = objects[0] + p = self.other() + x, y = o.x, o.y + if (x-p.x)**2 + (y-p.y)**2 < (x-self.x)**2 + (y-self.y)**2: + for o in objects: + o.transfer(p) + else: + MovingPile.finishmove(self, objects) class Pile2(Pile1): @@ -210,26 +210,26 @@ class Pile2(Pile1): tag = 'p2' def other(self): - return self.demo.p1 + return self.demo.p1 class Demo: def __init__(self, master): - self.master = master - self.canvas = Canvas(master, - width=200, height=200, - background='yellow', - relief=SUNKEN, borderwidth=2) - self.canvas.pack(expand=1, fill=BOTH) - self.p1 = Pile1(self) - self.p2 = Pile2(self) - o1 = Object(self.canvas, fill='red', text='o1') - o2 = Object(self.canvas, fill='green', text='o2') - o3 = Object(self.canvas, fill='light blue', text='o3') - o1.transfer(self.p1) - o2.transfer(self.p1) - o3.transfer(self.p2) + self.master = master + self.canvas = Canvas(master, + width=200, height=200, + background='yellow', + relief=SUNKEN, borderwidth=2) + self.canvas.pack(expand=1, fill=BOTH) + self.p1 = Pile1(self) + self.p2 = Pile2(self) + o1 = Object(self.canvas, fill='red', text='o1') + o2 = Object(self.canvas, fill='green', text='o2') + o3 = Object(self.canvas, fill='light blue', text='o3') + o1.transfer(self.p1) + o2.transfer(self.p1) + o3.transfer(self.p2) # Main function, run when invoked as a stand-alone Python program. |