在Python中退出Tks主循环?
我正在使用 Tkinter 编写幻灯片程序,但我不知道如何在不绑定键的情况下转到下一张图像。
import os, sys
import Tkinter
import Image, ImageTk
import time
root = Tkinter.Tk()
w, h = root.winfo_screenwidth(), root.winfo_screenheight()
root.overrideredirect(1)
root.geometry("%dx%d+0+0" % (w, h))
root.focus_set()
root.bind("<Escape>", lambda e: e.widget.quit())
image_path = os.path.join(os.getcwd(), 'images/')
dirlist = os.listdir(image_path)
for f in dirlist:
try:
image = Image.open(image_path+f)
tkpi = ImageTk.PhotoImage(image)
label_image = Tkinter.Label(root, image=tkpi) # ?
label_image.place(x=0,y=0,width=w,height=h)
root.mainloop(0)
except IOError:
pass
root.destroy()
我想添加一个 time.sleep(10) “而不是” root.mainloop(0) ,这样它就会在 10 秒后转到下一个图像。现在当我按 ESC 时它会改变。我怎样才能在那里有一个计时器?
编辑:我应该补充一点,我不希望另一个线程进行睡眠,即使它有效。
I'm writing a slideshow program with Tkinter, but I don't know how to go to the next image without binding a key.
import os, sys
import Tkinter
import Image, ImageTk
import time
root = Tkinter.Tk()
w, h = root.winfo_screenwidth(), root.winfo_screenheight()
root.overrideredirect(1)
root.geometry("%dx%d+0+0" % (w, h))
root.focus_set()
root.bind("<Escape>", lambda e: e.widget.quit())
image_path = os.path.join(os.getcwd(), 'images/')
dirlist = os.listdir(image_path)
for f in dirlist:
try:
image = Image.open(image_path+f)
tkpi = ImageTk.PhotoImage(image)
label_image = Tkinter.Label(root, image=tkpi) # ?
label_image.place(x=0,y=0,width=w,height=h)
root.mainloop(0)
except IOError:
pass
root.destroy()
I would like to add a time.sleep(10) "instead" of the root.mainloop(0) so that it would go to the next image after 10s. Now it changes when I press ESC. How can I have a timer there?
edit: I should add that I don't want another thread that does a sleep even though it works.
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你可以尝试
You can try
无需对图像进行循环 - 您已经在循环(主循环)中运行,因此请充分利用它。执行此操作的典型方法是创建一个方法来绘制某些内容,等待一段时间,然后调用自身。这不是递归,它只是告诉主循环“N秒后,再打电话给我”。
这是一个工作示例:
There's no need to do a loop over your images -- you're already running in a loop (mainloop) so take advantage of it. The typical way to do this is to create a method that draws something, waits for a period of time, then calls itself. This isn't recursion, it's just telling the main loop "after N seconds, call me again".
Here's a working example: