Re: [Programmed Object] Integrate my own Dialog Window in a callback function from right-clic menu

[Lars Clausen <lars raeder dk>]

On Thu, 2005-10-13 at 10:14 +0200, Jonathan CHABOISSIER wrote:
> > The user must select my object and right click on a Connection Box,
> > then there would be in the menu an activated item "Rename
> > ConnectionBox" (in case he clicked well of course) which would
> > create a window where the user could fill the name. 
> >
> > For the moment, I think I must create and define a GtkWidget in the
> > callback function. But in the first hand I wonder if there are
> > somethings like this already exists in Dia (I searched the code
> > corresponding to the properties dialog window with no result), and
> > in the other hand I want to ask if there could be a kinf of "Gtk
> > Conflict problem" if I try to create a pop-up widget by myself...

I must have missed this mail... no, there shouldn't be any conflict.

> I managed to program what I wanted. I finally had to use a GtkDialog
> and I had no problem with this. In the makefile, because I am now
> using Gtk objects in my own code, I added the line : PKG_LINK =
> $(PKG_LINK) $(GTK2_LIBS) to link with Gtk2 libraries.
>
> Example :
>
> !IFDEF OBJ_TEST
> OBJECTS = \
>     TEST.obj \
>     MyFirstObject.obj \
>     MySecondObject.obj \
> PKG_LINK = $(PKG_LINK) $(GTK2_LIBS)
> !ENDIF
>
> Concerning the GtkDialog object, you will find informations at
> http://www.gtk.org/tutorial/x882.html and if you are french like me at
> http://www.gtk-fr.org/wakka.php?wiki=LesBoitesDeDialogue

It's good that you got it working, but could you repeat why you're not
having the name be a property of the object?  That would do away with
any need for Gtk work and be much more integrated?

> However, I have now an new problem which does not come from Gtk.
>
> The dialog window is defined in a right clic callbcack function, and
> this kind of function must return a ChangeObject. In my Dialog, I want
> to allow the user to "Cancel" the operation, and in thtat case, I do
> not change anyhting. If the function returns a NULL value, Dia tells
> me "This object doesn't support Undo/Redo. Undo information erased."
> and thus the previous operations can not be cancelled.
> I could of course create an ObjectChande which would do nothing, but
> the user may think it is strange if when he tries to cancel the first
> time he does not see anything coming back.
>
> What do you think I should do ?

That's an interesting issue.  I hadn't really considered null actions
when doing the ObjectChange thing.  

-Lars

-- 
Lars Clausen <lars raeder dk>