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
