----- Original Message ----
From: Jason Brisbane <[EMAIL PROTECTED]>
To: JAMES SCOTT <[EMAIL PROTECTED]>
Sent: Monday, April 23, 2007 11:12:49 AM
Subject: Re: Treeview doesnt refresh upon reopenning window
HI,
Just a few issues I have been having with that:
- gtk_widget_destroy doesnt have a return value and another
lookup_widget to check if it exists would generate an error.
Comment: lookup_widget() returns a value or null. its this value that's
sometimes null and causing the error. consider:
...
GtkWidget *widget = NULL;
...
widget = lookup_widget(widget, "treeview4");
if () {
gtk_widget_destroy(widget);
}
...
- Every version of a treeview (from the internet, the GTK devhelp, etc)
I have found says that the liststore cannot be accessed after it is used
to create the model/view. If anyone can let me know how to access a
liststore after the listview is populated with data (ie how to access
the colums/rows and data therein) I'd change my approach.
Comment: These are advanced examples but look at the code in
http://GapcMon.Sourceforge.net/ and http://gfhcm.sourceforge.net/ In them one
or more treeviews are created and continually updated. Here are documentation
links which may shed more light: GTK+2.0 Tutorial
http://scentric.net/tutorial/
- the liststore is created when the window is shown and the window's
other process can all access the treeview access points and get the data
therein. The liststore however, I cannot access for love nor money.
Comment: This will return ptr to the associated liststore.
GtkTreeModel *gtk_tree_view_get_model(GtkTreeView *tree_view);Then with the
gtk_tree_store_{set,remore,insert, insert_before,insert_after,prepend,append}
api you can do everything except 'get' a record; use gtk_tree_model_get() to do
that.
- I'll always know when the database changes - every time I want to
issue the _show command. I could create another function called
"repopulate_treeview" but since the _show is going to do the exact same
thing, at the exact same time, it seemed pointless.
Comment: That would work; Just don't destroy and recreate it everytime. Keep a
ptr to the treeview and use that ptr to rediscovery the liststore for update
operations. If you change the liststore the treeview will automatically
refresh.
-Also, since the database will be sorted on its fields, I dont want to
have to make the program do any sorting. Thus all I need to do is grab
the result_set and repopulate the liststore from the top down with each
row, which will be presorted. Plus the list will only have approx 30
rows in it.
Comment: You can enable the treeview headers to be selectable -- causing a
dynamic column sort; plus a treeview can apply a default sort which you control.
If anyone can point me in the direction of how to re-write the program
to show the treeview's data then I'd be a very happy man!
Comment: Look at my apps and others; read the tutorial, and I hope your using
"DevHelp" and documentation app installed by default on most distributions;
fedora "yum install devhelp".
The only issue you may run into is Glade related; I don't know glade well, so
someone else will need to help you if you have glade issues.
Thanks in advance.
<SNIP>
--
Regards,
Jason Brisbane
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