[Tutor] events and popup menus

[Prasad, Ramit]

> 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)
> 
> 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()
>

I would probably use a lambda to pass the picture name (where LARGE_VIEW is a module level unique string identifier).

self.popup.add_command(label=LARGE_VIEW, command=lambda event: self.selectPicture( LARGE_VIEW) )

Or if you need the event in selectPicture

self.popup.add_command(label=LARGE_VIEW, command=lambda event: self.selectPicture( LARGE_VIEW, event) )


Ramit


Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology
712 Main Street | Houston, TX 77002
work phone: 713 - 216 - 5423

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