Python - Tkinter - Paint:如何平滑地绘制并使用不同的名称保存图像? [英] Python - Tkinter - Paint: How to Paint smoothly and save images with a different names?

问题描述

我制作了一个绘图程序，但我无法流畅地绘制并每次以不同的名称保存图像.请帮忙！

I made a paint program, but I can not draw smoothly and save the images each time with a different names. Please help!

from tkinter import *
# by Canvas I can't save image, so i use PIL
import PIL
from PIL import Image, ImageDraw


def save():
    filename = 'image.png'
    image1.save(filename)

def paint(event):
    x1, y1 = (event.x), (event.y)
    x2, y2 = (event.x + 1), (event.y + 1)
    cv.create_oval((x1, y1, x2, y2), fill='black', width=10)
    #  --- PIL
    draw.line((x1, y1, x2, y2), fill='black', width=10)


root = Tk()

cv = Canvas(root, width=640, height=480, bg='white')
# --- PIL
image1 = PIL.Image.new('RGB', (640, 480), 'white')
draw = ImageDraw.Draw(image1)
# ---- 
cv.bind('<B1-Motion>', paint)
cv.pack(expand=YES, fill=BOTH)

btn_save = Button(text="save", command=save)
btn_save.pack()

root.mainloop()

推荐答案

您可以使用连续绘图而不是单独绘制小圆圈.
下面的示例存储鼠标位置的最后一个值，以绘制一条线到当前值.

You could use continuous drawing instead of drawing separate small circles.
The following example stores the last values of the position of the mouse to draw a line to the current value.

您需要点击，并移动鼠标进行绘制；松开点击停止.

You need to click, and move the mouse to draw; release the click to stop.

图像名称包含一个数字，每次保存时增加 1；因此，您可以在绘制完整图片时保存所有中间图像.

The image name includes a number that is incremented by 1 each time you save; you can therefore save all the intermediate images as you draw the full picture.

from tkinter import *
import PIL
from PIL import Image, ImageDraw


def save():
    global image_number
    filename = f'image_{image_number}.png'   # image_number increments by 1 at every save
    image1.save(filename)
    image_number += 1


def activate_paint(e):
    global lastx, lasty
    cv.bind('<B1-Motion>', paint)
    lastx, lasty = e.x, e.y


def paint(e):
    global lastx, lasty
    x, y = e.x, e.y
    cv.create_line((lastx, lasty, x, y), width=1)
    #  --- PIL
    draw.line((lastx, lasty, x, y), fill='black', width=1)
    lastx, lasty = x, y


root = Tk()

lastx, lasty = None, None
image_number = 0

cv = Canvas(root, width=640, height=480, bg='white')
# --- PIL
image1 = PIL.Image.new('RGB', (640, 480), 'white')
draw = ImageDraw.Draw(image1)

cv.bind('<1>', activate_paint)
cv.pack(expand=YES, fill=BOTH)

btn_save = Button(text="save", command=save)
btn_save.pack()

root.mainloop()

<小时>

据称不比你的更糟糕，但线条是连续的......

---

Allegedly not less terrible than yours, but the lines are continuous...

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