Thanks Peter - I finally got back to working on this while my dog was having a
panic attack from a thunderstorm about 430 AM. :-) She is asleep as my feet.
Anyway, great example and it showed me exactly what i needed to do, AND what I
was doing wrong.
I appreciate your help!
On May 3, 2012, at 5:30 AM, Peter Otten wrote:
> Chris Hare wrote:
>
>> I have four images in a frame. I want to pop up a menu when the user
>> right clicks on an image, and when they choose an option from the menu,
>> execute the action.
>>
>> I can create the popup menu, and bind it to the image. However, what I
>> can't figure out is how to detect in the popup menu code which image fired
>> the event so I can do the right thing (like display a larger version of
>> the image, etc.)
>>
>> # create a menu
>> self.popup = Menu(self.pictureWindow, tearoff=0)
>> self.popup.add_command(label="Change Picture",
>> command=self.selectPicture) self.popup.add_command(label="Make Primary",
>> command=self.selectPicture) self.popup.add_command(label="Large View",
>> command=self.selectPicture)
>
> You should have a different callback for every menu item:
>
> self.popup.add_command(label="Change Picture", command=self.change_picture)
> ...
> self.popup.add_command(label="Large View", command=self.large_view)
>
>
>> self.picture1.bind("<Button-1>", self.do_popup)
>>
>> def do_popup(self,event):
>> # display the popup menu
>> try:
>> self.popup.tk_popup(event.x_root, event.y_root, 0)
>>
>> finally:
>> # make sure to release the grab (Tk 8.0a1 only)
>> self.popup.grab_release()
>>
>> Thanks for the advice!
>
> You can remember the widget from do_popup()'s event argument
>
> def do_popup(self, event):
> self.current_picture = event.widget
> ...
>
> and later refer to it in the menu callbacks
>
> def select_picture(self):
> picture = self.current_picture
> ...
>
> I got a bit distracted struggling with PIL, therefore my "self-contained
> demo" got rather baroque. You may still find it useful:
>
> $ cat tk_popup_demo.py
> import sys
> import Tkinter as tk
> import ImageTk
> import Image
>
> current_label = None
>
> def do_popup(event):
> global current_label
> current_label = event.widget
> try:
> popup.tk_popup(event.x_root, event.y_root, 0)
> finally:
> popup.grab_release()
>
> def rotate_picture():
> image = current_label.photoimage.image.rotate(90)
> photoimage = ImageTk.PhotoImage(image)
> photoimage.image = image
> current_label.photoimage = current_label["image"] = photoimage
>
> def flip_picture():
> print "flip picture"
>
> def load_image(filename, maxsize=(500, 500), padcolor="#f80"):
> image = Image.open(filename)
> image.thumbnail(maxsize)
> if image.size != maxsize:
> padded_image = Image.new(image.mode, maxsize, color=padcolor)
> maxx, maxy = maxsize
> x, y = image.size
> padded_image.paste(image, ((maxx-x)//2, (maxy-y)//2))
> image = padded_image
> assert image.size == maxsize
> return image
>
> root = tk.Tk()
>
> picturefiles = sys.argv[1:4]
> for i, filename in enumerate(picturefiles):
> image = load_image(filename)
> photoimage = ImageTk.PhotoImage(image)
> photoimage.image = image
>
> label = tk.Label(root, image=photoimage)
> label.photoimage = photoimage
> label.grid(row=0, column=i)
> label.bind("<Button-3>", do_popup)
>
> popup = tk.Menu(root, tearoff=0)
> popup.add_command(label="Rotate", command=rotate_picture)
> popup.add_command(label="Flip", command=flip_picture)
>
> root.mainloop()
>
> Invoke with a few picture names (all but the first three will be ignored):
>
> $ python tk_popup_demo.py *.jpg
>
>
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