Why my image cannot be displayed?
Hi All, Image display drives me crazy. After I get it displayed, and want to do the job with a class, display failed again. Please take a look at my trial code: from Tkinter import * class imageDisplay: def __init__(self, parent=None): canvas = Canvas(width=400, height=300, bg='beige') canvas.pack() self.canvas = canvas img = PhotoImage(file="xxx.gif") self.canvas.create_image(150, 0, image=img, anchor=NW) if __name__ == '__main__': imageDisplay() mainloop() Result: A blank canvas was displayed. No error message. Can somebody help? Thanks so much! -- https://mail.python.org/mailman/listinfo/python-list
Re: Why my image cannot be displayed?
On Friday, August 12, 2016 at 9:40:15 PM UTC-4, huey.y...@gmail.com wrote: > Hi All, > > Image display drives me crazy. After I get it displayed, and want to do the > job with a class, display failed again. Please take a look at my trial code: > > from Tkinter import * > > class imageDisplay: > def __init__(self, parent=None): > canvas = Canvas(width=400, height=300, bg='beige') > canvas.pack() > self.canvas = canvas > img = PhotoImage(file="xxx.gif") > self.canvas.create_image(150, 0, image=img, anchor=NW) > > if __name__ == '__main__': > imageDisplay() > mainloop() > > Result: A blank canvas was displayed. No error message. > > Can somebody help? Thanks so much! Thanks! it's working. Particularly thanks for your explanation! -- https://mail.python.org/mailman/listinfo/python-list
What is the trick between these?
Hi All, I am trapped by these two funny things: class MyClass(upClass): def start(self): ***do_menu_here self.load_label_image() # ---> this works self.load_canvas_image() # ---> this does not work def load_label_image(self): img = PhotoImage(file="xx.gif") Label(self, image=img).pack(side=BOTTOM, expand=YES, fill=BOTH) return img def load_canvas_image(self): img = PhotoImage(file="xx.gif") self.canvas = Canvas(self, width=500, height=300, bg='white') self.canvas.pack(expand=YES, fill=BOTH) self.canvas.create_image(50, 0, image=img, anchor=NW) if __name__ == '__main__': root = Tk() root.mainloop() load_label_image() works. However, I cannot do BIND with it, because img has no method to do binding. So, I am trying load_canvas_image. Surprise, it does not work. These two defs are so similar, but Python complained that no attribute of load_canvas_image(). It is there, coexisting with load_label_image(). I cannot figure out what is wrong with it, can somebody tell me why? Thanks! -- https://mail.python.org/mailman/listinfo/python-list
How to make a button flashing?
Hi All, I forgot the syntax of making a button flash, and failed to find an example in the web. I use Tkinter, to create a button. Then made it packed, and showed up. Now I am trying to make button b flashing, to make it get better noticed. I checked the docs, and found a method flash() is available, then I tried: b.flash() there was no error message popped out, but there was nothing happened also. I wonder who can give me this help? Thanks! Huey -- https://mail.python.org/mailman/listinfo/python-list
Re: How to make a button flashing?
On Wednesday, June 13, 2018 at 5:23:17 PM UTC+8, huey.y...@gmail.com wrote: > Hi All, > > I forgot the syntax of making a button flash, and failed to find an example > in the web. I use Tkinter, to create a button. Then made it packed, and > showed up. Now I am trying to make button b flashing, to make it get better > noticed. I checked the docs, and found a method flash() is available, then I > tried: > > b.flash() > > there was no error message popped out, but there was nothing happened also. I > wonder who can give me this help? Thanks! > > Huey Thanks, Terry, it works! -- https://mail.python.org/mailman/listinfo/python-list
How to find an object existing?
Hi All, root = Tkinter.Tk() button = Tkinter.Button(root, text="Find me") button.pack() I created a button, Python object. I recall I can check this object existing by using winfo, such as winfo.exists(button). However, I forgot which super class contains this winfo method. I printed out dir(os), dir(sys), dir(Tkinter), but did not find this winfo method. I wonder who will be kindly drop down a few lines? Thanks a lot! Huey -- https://mail.python.org/mailman/listinfo/python-list
Re: Image loading problem
Thanks so much! All of methods works! -- https://mail.python.org/mailman/listinfo/python-list
Is it possible to draw a BUTTON?
Hi Folks, It is common to put a BUTTON on a canvas by the means of coding. However, in my application, I need to draw a circle on canvas, and then make this circle to work as if it is a button. When the circle is clicked, it triggers a new image to be displayed. Somebody can help? Thanks! -- https://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to draw a BUTTON?
On Wednesday, July 27, 2016 at 4:18:29 PM UTC-4, huey.y...@gmail.com wrote: > Hi Folks, > > It is common to put a BUTTON on a canvas by the means of coding. However, in > my application, I need to draw a circle on canvas, and then make this circle > to work as if it is a button. When the circle is clicked, it triggers a new > image to be displayed. Somebody can help? Thanks! ---> By the way, the GUI is TK. -- https://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to draw a BUTTON?
On Wednesday, July 27, 2016 at 4:18:29 PM UTC-4, huey.y...@gmail.com wrote: > Hi Folks, > > It is common to put a BUTTON on a canvas by the means of coding. However, in > my application, I need to draw a circle on canvas, and then make this circle > to work as if it is a button. When the circle is clicked, it triggers a new > image to be displayed. Somebody can help? Thanks! The example works. It is smart to bind a button to a widget, I'v learned. Thanks so much! -- https://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to draw a BUTTON?
On Wednesday, July 27, 2016 at 10:00:47 PM UTC-4, Rick Johnson wrote:
> On Wednesday, July 27, 2016 at 7:15:20 PM UTC-5, MRAB wrote:
> > On 2016-07-28 00:13, huey.y.ji...@gmail.com wrote:
> > > On Wednesday, July 27, 2016 at 4:18:29 PM UTC-4, huey.y...@gmail.com
> > > wrote:
> > >> Hi Folks,
> > >>
> > >> It is common to put a BUTTON on a canvas by the means of coding.
> > >> However, in my application, I need to draw a circle on canvas, and then
> > >> make this circle to work as if it is a button. When the circle is
> > >> clicked, it triggers a new image to be displayed. Somebody can help?
> > >> Thanks!
> > > Yes, Rick's code works great. Well, could you go a little further? I
> > > wish to pop out an image, while clicking the circle button. I mean, when
> > > the circle button was clicked, an image is displayed. Thanks.
> > > ---> By the way, the GUI is TK.
> > >
> > Here's a simple example:
> >
> >
> > #! python3.5
> > # -*- coding: utf-8 -*-
> > import tkinter as tk
> >
> > def mouse_clicked(event):
> > dist_sq = (event.x - circle['x']) ** 2 + (event.y - circle['y']) ** 2
> >
> > if dist_sq <= circle['radius'] ** 2:
> > print('Clicked inside circle')
> >
> > root = tk.Tk()
> >
> > canvas = tk.Canvas(root, width=400, height=200)
> > canvas.pack()
> >
> > circle = dict(x=60, y=60, radius=20)
> >
> > left = circle['x'] - circle['radius']
> > top = circle['y'] - circle['radius']
> > right = circle['x'] + circle['radius']
> > bottom = circle['y'] + circle['radius']
> >
> > canvas.create_oval((left, top, right, bottom), outline='red', fill='red')
> > canvas.bind('', mouse_clicked)
> >
> > root.mainloop()
>
> I didn't try your code, but you can simply it by using some of the core
> functionality provided via "canvas.tag_bind(...)"
>
> ## START CODE ##
> import Tkinter as tk
>
> def cb_canvasButton(event):
> print 'You clicked me using button {0}'.format(event.num)
> canvas.move('button', 10, 10) # Little extra surprise!
>
> root = tk.Tk()
> canvas = tk.Canvas(root)
> canvas.create_oval(10,10,50,50, outline='red', fill='blue',
>tags=('button',)
>)
> canvas.tag_bind('button', '', cb_canvasButton)
> canvas.pack()
>
> root.mainloop()
> ## END CODE ##
--
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How to run an infinite loop on Menu?
Hi Folks, I need to run an infinite loop on a Menu button, like this: from Tkinter import * def run_job(): i = 0 while 1: i = i + 1 if i > 100: break ... root = Tk() menu = Menu(root) root.config(menu=menu) filemenu = Menu(menu) menu.add_cascade(label="Jobs", menu=filemenu) filemenu.add_command(label="Run", command=run_job) mainloop() In fact, the def run_job has more things to do. But, it is an infinite loop in essence. It works. However, when the def run_job is running, the menu will be hang there. I have no way to stop it. Even if I raise it with Key-Interupt, the thing was the same: the infinite loop cannot be stopped nicely. The only way was to wait until the Python interpreter notice the problem, and popped out an error message, then I can kill the running program. Can anybody tell me how to handle this? I wish when variable i reached 100, the run_job will be end, and the Menu "Run" will be free. Thanks in advance. -- https://mail.python.org/mailman/listinfo/python-list
