Re: question about design

[Havoc Pennington <hp redhat com>]

apatruduque <apatruduque yahoo es> writes: 
> 1- I don't know what is the best thing to do when I
> want to close the second window: hide it with
> gtk_widget_hide or destroy it with gtk_widget_destroy.
> May be in this example is not very important but what
> would it happen in a program like gimp? There, you can
> finish with a lot of windows in your screen and  if
> every time you close and open a window you have to
> create from scratch, it takes some time. On the other
> hand, if  you keep all the windows hide, you might be
> wasting resources...I guess the answer is "It depends
> on your application."

In nearly all cases, destroy is correct because creating the window
takes no appreciable amount of time, but keeping all your windows
around does use a noticeable amount of memory.

> 2- What to do when it is not only a label but some
> more complicated data structure what two windows or
> widgets share? Is using global variables and data
> structures a solution?

Global variables are fine for simple cases, for a larger program you'd
usually want to use structs or the like and an object-oriented coding
style.

To get data into callbacks, two options are gtk_object_set_data() and
the callback data itself.

Havoc