复制 Tkinter 画布项目 [英] Copy Tkinter Canvas Items

问题描述

我需要 top 能够创建 tkinter 画布项目的副本，以便可以从原件中拖出图像的副本.我已经为图像拖动工作，但我似乎无法复制图像项目.任何帮助将不胜感激！谢谢.

I need top be able to create a copy of a tkinter canvas item, so that a copy of an image can be dragged off of an original. I have dragging working for the images, but I cannot seem to copy the image item. Any help would be greatly appreciated! Thanks.

抱歉一开始没有包含我的代码.由于给出的答案，我能够解决问题.这是我现在可以使用的代码的精简示例:

Sorry for not including my code at first. I was able to solve the problem thanks to the answer that was given. Here's a trimmed down example of my code that now works:

from tkinter import *
from PIL import Image, ImageTk

def OnBaseButtonPress(event):
    #record the item and its location
    drag_data["item"] = c.find_closest(event.x, event.y)

    i = c.itemcget(drag_data["item"], "image") #finds the image source of the object
    refs.append(i) #keep a reference!
    c.create_image(c.coords(drag_data["item"]), image=i, tags="base") #creates an identical object at the position

    drag_data["x"] = event.x
    drag_data["y"] = event.y

def OnBaseButtonRelease(event):
    #reset drag info
    drag_data["item"] = None
    drag_data["x"] = 0
    drag_data["y"] = 0

def OnBaseMotion(event):
    #calculate how far the item has moved
    delta_x = event.x - drag_data["x"]
    delta_y = event.y - drag_data["y"]
    #move the object that amount
    c.move(drag_data["item"], delta_x, delta_y)
    #record the new position
    drag_data["x"] = event.x
    drag_data["y"] = event.y

#set up canvas and image
root = Tk()
c = Canvas(root, width=800, height=600)
c.pack()
test = ImageTk.PhotoImage(Image.open("test.png"))
c.create_image(400, 300, image=test, tags="base")
refs=[] #used to keep references to images used in functions

#bind mouse keys 
c.tag_bind("base", "<ButtonPress-1>", OnBaseButtonPress)
c.tag_bind("base", "<ButtonRelease-1>", OnBaseButtonRelease)
c.tag_bind("base", "<B1-Motion>", OnBaseMotion)

drag_data={"x": 0, "y": 0, "item": None}

mainloop()

推荐答案

您可以获取项目类型 (canvas.type(item))，项目配置(canvas.itemconfig(item)) 等

You can get item type (canvas.type(item)), item configuration (canvas.itemconfig(item)) and etc.

而且你可以重新创建相同的对象.

And than you can recreate identical object.

另见:Tkinter - 制作第二个画布显示另一个内容

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