class canvasInterface(interfaceScreen): def __init__(self,master,width,height): interfaceScreen.__init__(self) self.canvas = Canvas(master, width=width, height=height,bg='white') self.canvas.grid(row=0,column=1) """ ---------------Interfaz con objeto dibujante--------------------- """ def deleteFromCanvas(self,id): self.canvas.delete(id) pass def create_rectangle(self,x1, y1, x2, y2,*arg,**kargs): return self.canvas.create_rectangle(x1, y1, x2, y2,*arg,**kargs) pass def create_line(self,x1, y1, x2, y2, *args,**kwargs): return self.canvas.create_line(x1, y1, x2, y2, *args,**kwargs) def create_text(self,x1, y1,*args,**kargs): return self.canvas.create_text(x1, y1,*args,**kargs) def scan_mark(self,x,y): self.canvas.scan_mark(x, y) def scan_dragto(self,x, y, *args,**kwargs): self.canvas.scan_dragto(x, y, *args,**kwargs) def winfo_height(self): return self.canvas.winfo_height() def winfo_width(self): return self.canvas.winfo_width()
class Viewer(Frame): def __init__(self, master,x=600,y=200, onLeft=None, onRight=None, **kwargs): self.root=master self.xsize=x self.ysize=y self.onLeft=onLeft self.onRight=onRight self.ratio=100. Frame.__init__(self, master,width=x,height=y, **kwargs) self.canvas = Canvas(self, width=x, height=y, background="white") self.xsb = Scrollbar(self, orient="horizontal", command=self.canvas.xview) self.ysb = Scrollbar(self, orient="vertical", command=self.canvas.yview) self.canvas.configure(yscrollcommand=self.ysb.set, xscrollcommand=self.xsb.set) self.canvas.configure(scrollregion=(0,0,x,y)) self.xsb.grid(row=1, column=0, sticky="ew") self.ysb.grid(row=0, column=1, sticky="ns") self.canvas.grid(row=0, column=0, sticky="nsew") self.grid_rowconfigure(0, weight=1) self.grid_columnconfigure(0, weight=1) self.canvas.bind("<Button-1>", self.clickL) self.canvas.bind("<Button-3>", self.clickR) # This is what enables using the mouse: self.canvas.bind("<ButtonPress-1>", self.move_start) self.canvas.bind("<B1-Motion>", self.move_move) #linux scroll self.canvas.bind("<Button-4>", self.zoomerP) self.canvas.bind("<Button-5>", self.zoomerM) self.canvas.bind_all("<Prior>", self.zoomerP) self.canvas.bind_all("<Next>", self.zoomerM) self.canvas.bind_all("E", self.zoomExtens) #windows scroll self.canvas.bind_all("<MouseWheel>",self.zoomer) def reset(self): pass def set_title(self, title): self.root.title( title) #move def move_start(self, event): self.canvas.scan_mark(event.x, event.y) return True def move_move(self, event): self.canvas.scan_dragto(event.x, event.y, gain=1) return True #windows zoom def zoomer(self,event): if (event.delta > 0): self.ratio *= 1.1 elif (event.delta < 0): self.ratio *= 0.9 self.redraw() def redraw(self): self.canvas.delete("all") self.canvas.configure(scrollregion = self.canvas.bbox("all")) def zoomExtens(self, *args): x0,y0,x1,y1 = self.canvas.bbox("all") xlen=x1-x0 ylen=y1-y0 height=self.canvas.winfo_height() width=self.canvas.winfo_width() unfit=min(width/float(xlen), height/float(ylen)) self.ratio*=unfit self.redraw() # """" if xlen and ylen: self ratio*= self.canvas.scale("all", xlen/2., ylen/2., float(self.xsize)/xlen, float(self.ysize)/ylen) self.canvas.configure(scrollregion = self.canvas.bbox("all")) """ #linux zoom def zoomerP(self,event): self.canvas.scale("all", event.x, event.y, 1.1, 1.1) self.canvas.configure(scrollregion = self.canvas.bbox("all")) def zoomerM(self,event): self.canvas.scale("all", event.x, event.y, 0.9, 0.9) self.canvas.configure(scrollregion = self.canvas.bbox("all")) def pose2p(self, pose): x,y=pose[:2] return int(x*self.ratio), -int(y*self.ratio) def line2p(self, line): if type(line[0]) in (float, int): line=zip(line[::2],line[1::2]) return map(self.pose2p, line) def p2m(self, x, y): return x/self.ratio, -y/self.ratio def create_line(self, coords, **kwargs): return self.canvas.create_line(self.line2p(coords), **kwargs) def create_polygon(self, coords, **kwargs): return self.canvas.create_polygon(self.line2p(coords), **kwargs) def delete(self, object): self.canvas.delete(object) def clickL(self, event): if self.onLeft: x,y=self.p2m(int(self.canvas.canvasx(event.x)), int(self.canvas.canvasy(event.y))) self.onLeft(x,y) return True def clickR(self, event): if self.onRight: x,y=self.p2m(int(self.canvas.canvasx(event.x)), int(self.canvas.canvasy(event.y))) self.onRight(x,y) return True