所以，我正在使用python制作图库的在线课程的简单项目。问题是创建3个按钮，一个是Next，Previous和Quit。到目前为止，退出按钮工作，下一个加载一个新的图像，但在不同的窗口，我对Tkinter的python和GUI编程很新，所以这是初学者课程的一个重要部分。
到目前为止，我的代码看起来像这样，一切正常。但是我需要帮助才能创建上一个和下一个按钮，到目前为止我已经使用了新语句，但它在另一个窗口中打开。我只是想显示1张图片，然后用一些简单的文字点击下一张图片。
import Image
import ImageTk
import Tkinter
root = Tkinter.Tk();
text = Tkinter.Text(root, width=50, height=15);
myImage = ImageTk.PhotoImage(file='nesta.png');
def new():
wind = Tkinter.Toplevel()
wind.geometry('600x600')
imageFile2 = Image.open("signori.png")
image2 = ImageTk.PhotoImage(imageFile2)
panel2 = Tkinter.Label(wind , image=image2)
panel2.place(relx=0.0, rely=0.0)
wind.mainloop()
master = Tkinter.Tk()
master.geometry('600x600')
B = Tkinter.Button(master, text = 'Previous picture', command = new).pack()
B = Tkinter.Button(master, text = 'Quit', command = quit).pack()
B = Tkinter.Button(master, text = 'Next picture', command = new).pack()
master.mainloop()
答案 0 :(得分：1)
通过设置图像项目来更改图像：Label['image'] = photoimage_obj
import Image
import ImageTk
import Tkinter
image_list = ['1.jpg', '2.jpg', '5.jpg']
text_list = ['apple', 'bird', 'cat']
current = 0
def move(delta):
global current, image_list
if not (0 <= current + delta < len(image_list)):
tkMessageBox.showinfo('End', 'No more image.')
return
current += delta
image = Image.open(image_list[current])
photo = ImageTk.PhotoImage(image)
label['text'] = text_list[current]
label['image'] = photo
label.photo = photo
root = Tkinter.Tk()
label = Tkinter.Label(root, compound=Tkinter.TOP)
label.pack()
frame = Tkinter.Frame(root)
frame.pack()
Tkinter.Button(frame, text='Previous picture', command=lambda: move(-1)).pack(side=Tkinter.LEFT)
Tkinter.Button(frame, text='Next picture', command=lambda: move(+1)).pack(side=Tkinter.LEFT)
Tkinter.Button(frame, text='Quit', command=root.quit).pack(side=Tkinter.LEFT)
move(0)
root.mainloop()
答案 1 :(得分：-1)
我的用户界面不太好。但我的逻辑运行良好，我测试得很好。你可以改变用户界面。它是如何工作的，首先我们需要浏览文件，当我们点击打开它时，它会显示图像，并且它还会创建一个位于所选图像文件夹中的图像列表。我只提到了“.png”和“.jpg”文件。如果你想添加更多你可以在path_func()中添加它。
from tkinter import *
from PIL import Image, ImageTk
from tkinter import filedialog
import os
class ImageViewer:
def __init__(self, root):
self.root = root
self.root.title("Photo Viewer")
self.root.geometry("1360x750")
self.root.config(bg = "lightblue")
menus = Menu(self.root)
self.root.config(menu = menus)
file_menu = Menu(menus)
menus.add_cascade(label = "File", menu = file_menu)
file_menu.add_command(label = "Open", command = self.open_dialog)
file_menu.add_separator()
file_menu.add_command(label = "Previous", command = self.previous_img)
file_menu.add_command(label = "Next", command = self.next_img)
file_menu.add_separator()
file_menu.add_command(label = "Exit", command = self.root.destroy)
self.label = Label(self.root, text = "Open a image using open menu", font = ("Helvetica", 15), foreground = "#0000FF", background = "lightblue")
self.label.grid(row = 0, column = 0, columnspan = 4)
self.buttons()
def path_func(self, path):
l = []
self.path = path.split('/')
self.path.pop()
self.path = '/'.join([str(x) for x in self.path])
#print(self.path)
for file in os.listdir(self.path):
if file.endswith('.jpg') or file.endswith('.png'):
l.append(file)
#print(l)
def join(file):
os.chdir(self.path)
#print(os.getcwd())
cwd = os.getcwd().replace('\\', '/')
#print(cwd)
f = cwd + '/' + file
#print(f)
return f
global file_list
file_list = list(map(join, l))
#print(file_list)
def open_dialog(self):
global file_name
file_name = filedialog.askopenfilename(initialdir = "C:/Users/elcot/Pictures", title = "Open file")
#print(file_name)
self.view_image(file_name)
self.path_func(file_name)
'''except:
label = Label(self.root, text = "Select a file to open")
label.grid(row = 4, column =1)'''
def view_image(self, filename):
try:
self.label.destroy()
global img
img = Image.open(filename)
img = img.resize((1360, 650))
img = ImageTk.PhotoImage(img)
#print(img)
show_pic = Label(self.root, image = img)
show_pic.grid(row = 1, column = 0, columnspan = 3)
except:
pass
def buttons(self):
open_button = Button(self.root, text = "Browse", command = self.open_dialog, background = "lightblue")
open_button.grid(row = 1, column = 1)
previous_button = Button(self.root, text = "Previous", command = self.previous_img, background = "lightblue", width = 25)
previous_button.grid(row = 3, column = 0, pady = 10)
empty = Label(self.root, text = " ", background = "lightblue")
empty.grid(row = 3, column = 1)
next_button = Button(self.root, text = "Next", command = self.next_img, background = "lightblue", width = 25)
next_button.grid(row = 3, column = 2)
def previous_img(self):
global file_name
#print(file_list)
index = file_list.index(file_name)
#print(index)
curr = file_list[index - 1]
#print(curr)
self.view_image(curr)
file_name = curr
def next_img(self):
global file_name
index = file_list.index(file_name)
#print(index)
if index == len(file_list) - 1:
index = -1
curr = file_list[index + 1]
#print(curr)
self.view_image(curr)
file_name = curr
else:
curr = file_list[index + 1]
#print(curr)
self.view_image(curr)
file_name = curr
if __name__ == "__main__":
root = Tk()
gallery = ImageViewer(root)
root.mainloop()