CODEWITHSUNDEEP
pythontkinter
Данил Скрынник
Данил Скрынник

Reputation: 13

Slide show program, event processing

I need the images to change if the cursor is inside the window without moving, but I managed to make the image changes only if the cursor is moving inside the window, how can I change the code?

from itertools import cycle
import tkinter as tk
from PIL import ImageTk, Image
import glob

image_files = glob.glob("*.jpg")
root = tk.Toplevel()
root.geometry("1600x900")
pictures = cycle((ImageTk.PhotoImage(file=image), image) for image in image_files)                              
picture_display = tk.Label(root)
picture_display.pack()
def show_slides(event):           
    img_object, img_name = next(pictures)
    root.after(500, picture_display.config(image=img_object))  
root.bind("<Motion>", show_slides)
root.mainloop()

Upvotes: 1

Views: 59

Answers (2)

astqx
astqx

Reputation: 2096

You could bind the <Enter> and <Leave> events and use a flag to control the call, followed by using the after method to loop the function.

def show_slides(event=None):    
    global change_slide
    img_object, img_name = next(pictures)
    picture_display.config(image=img_object)
    change_slide=root.after(500,show_slides)  

def stop_slides(event):
    root.after_cancel(change_slide)

root.bind("<Enter>", show_slides)
root.bind("<Leave>", stop_slides)

UPDATE

Using a flag might cause multiple calls being scheduled it the events happen during the 500ms delay, you can use after_cancel to terminate it.

Upvotes: 1

Alderven
Alderven

Reputation: 8270

You can calculate cursor position in loop and show image if it's located within tkinter window:

import glob
import tkinter as tk
from PIL import ImageTk
from itertools import cycle

class App(object):
    def __init__(self):
        self.root = tk.Tk()
        self.root.geometry('900x600')
        self.lbl = tk.Label(self.root)
        self.lbl.pack()
        files = glob.glob('*.jpg')
        self.images = cycle((ImageTk.PhotoImage(file=f), f) for f in files)
        self.show()
        self.root.mainloop()

    def show(self):
        abs_coord_x = self.root.winfo_pointerx() - self.root.winfo_rootx()
        abs_coord_y = self.root.winfo_pointery() - self.root.winfo_rooty()
        if 0 <= abs_coord_x <= self.root.winfo_width() and 0 <= abs_coord_y <= self.root.winfo_height():
            img_object, img_name = next(self.images)
            self.lbl.config(image=img_object)
        self.root.after(1000, self.show)

App()

Upvotes: 0

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