What is this widget? -- again

[88888 Dihedral]

On Thursday, December 15, 2011 11:53:55 PM UTC+8, Rick Johnson wrote:
> On Dec 14, 8:17 pm, Muddy Coder <cosmo_... at yahoo.com> wrote:
> > Hi Folks,
> >
> > Sorry for the unclear question in last post. Well, I am using Tkinter
> > to do GUI, and I just don't know what kind of widget can let me do
> > annotation on an image being displayed. An example is the Paint of
> > Windows: a dotted line box appearing on a image to hold a typed in
> > text. I just can't figure out what widget in Tkinter is equivalent to
> > that dotted line box. Please help, thanks again!
> >
> > Cosmo
> 
> No such widget exists in Tkinter. As Dennis said the code must be
> written. I can assure you that this functionality can be created with
> Tkinter (because i've done it myself) however it requires an in-depth
> knowledge of Tkinter -- which apparently you don't have since you are
> asking the question.
> 
> Waring: NEVER USE ANY MICROSOFT INTERFACE AS INSPIRATION!!!
> 
> Whist you ponder the intricacies professional of image annotation, i
> suggest you follow my advice in your OTHER post (of the same title)
> and use the "canvas.create_text" method to draw text on top of images
> THEN you need to learn how to move "canvas items" around the canvas
> using the mouse THEN you need to intercept right clicks on the text
> item and show a dialog with an entry widget stuffed inside so the user
> can edit the text THEN update the canvas text from user input.  When
> solving a problem you need to follow a linear path. The first step in
> this path is to draw text on a canvas.
> 
> 1. Draw text to a canvas.
> 2. Intercept right click events on a "canvas text".
> 3. Build a custom dialog using tkSimpleDialog (or use a floating
> "canvas window") to display a Tkinter Entry widget so the user can
> edit the current value of the "canvas text".
> 4. Fetch the value of Tkinter "canvas text"
> 5. Load the value into the entry widget.
> 6. Update the value of the canvas text item based on user input
> returned from the dialog.
> 
> Extra Credit:
> * capture mouse drag events and allow user manipulation of "canvas
> text" x-y position.
> 
> http://infohost.nmt.edu/tcc/help/pubs/tkinter/
> http://effbot.org/tkinterbook/
> 
> ...may the source be with you.

Check BOA and wxpython and work out the examples. 

It is kind of boring and not too easy to be accustomed to use. 

A simpler set of the toolkit pygame and pyimg to explore is another way to 
advance. 

Study the source of pyimg is very helpful.