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- #
- # The Python Imaging Library
- # $Id: painter.py,v 1.1.1.1 1998/08/18 13:07:58 sjoerd Exp $
- #
- # this demo script illustrates pasting into an already displayed
- # photoimage. note that the current version of Tk updates the whole
- # image everytime we paste, so to get decent performance, we split
- # the image into a set of tiles.
- #
-
- from Tkinter import *
- import Image, ImageTk
- import sys
-
- #
- # painter widget
-
- class PaintCanvas(Canvas):
- def __init__(self, master, image):
- Canvas.__init__(self, master, width=image.size[0], height=image.size[1])
-
- # fill the canvas
- self.tile = {}
- self.tilesize = tilesize = 32
- xsize, ysize = image.size
- for x in range(0, xsize, tilesize):
- for y in range(0, ysize, tilesize):
- box = x, y, min(xsize, x+tilesize), min(ysize, y+tilesize)
- tile = ImageTk.PhotoImage(image.crop(box))
- self.create_image(x, y, image=tile, anchor=NW)
- self.tile[(x,y)] = box, tile
-
- self.image = image
-
- self.bind("<B1-Motion>", self.paint)
-
- def paint(self, event):
- xy = event.x - 10, event.y - 10, event.x + 10, event.y + 10
- im = self.image.crop(xy)
-
- # process the image in some fashion
- im = im.convert("L")
-
- self.image.paste(im, xy)
- self.repair(xy)
-
- def repair(self, box):
- # update canvas
- dx = box[0] % self.tilesize
- dy = box[1] % self.tilesize
- for x in range(box[0]-dx, box[2]+1, self.tilesize):
- for y in range(box[1]-dy, box[3]+1, self.tilesize):
- try:
- xy, tile = self.tile[(x, y)]
- tile.paste(self.image.crop(xy))
- except KeyError:
- pass # outside the image
- self.update_idletasks()
-
- #
- # main
-
- root = Tk()
-
- im = Image.open(sys.argv[1])
-
- if im.mode != "RGB":
- im = im.convert("RGB")
-
- PaintCanvas(root, im).pack()
-
- root.mainloop()
-