RE: gtk_tree_view_scroll_to_cell scrolls to the wrong cell.

["Erik Simonsen" <erik pinksheets com>]

On my machine, if I load up 20,000 rows, and then scroll to say, row 10,000,
it will scroll to 10,000 perfectly, but then 5 seconds later (I presume it's
still loading higher rows?), it will scroll back down to around one hundred.
I guess I'll load gtk+2 on another machine to try it there.  Still redhat,
but 7.2 instead of 7.3.

Thanks for your help
Erik

-----Original Message-----
From: Harring Figueiredo [mailto:harringf yahoo com]
Sent: Thursday, October 10, 2002 9:24 AM
To: Erik Simonsen; gtk-app-devel-list gnome org
Subject: RE: gtk_tree_view_scroll_to_cell scrolls to the wrong cell.



 Do you have another machine to try it on ?

 One problem I saw was that with a list of 20,000 it takes a long while for
the
up to come up ( I actually did not have patience and ^C it.)

HArring.
--- Erik Simonsen <erik pinksheets com> wrote:
> This was with GTK+-2.0.6 on Redhat 7.3.  With the code in my last message,
> the list repeatedly scrolls to somewhere between row 50 and 100.  I don't
> know what it could be if you don't see the same behaviour on your system.
> arrg.  I've been fighting this for months.  My application looks
> ridiculous--the lists are jumping all over the place.
>
> -----Original Message-----
> From: Harring Figueiredo [mailto:harringf yahoo com]
> Sent: Wednesday, October 09, 2002 5:56 PM
> To: Erik Simonsen; gtk-app-devel-list gnome org
> Subject: Re: gtk_tree_view_scroll_to_cell scrolls to the wrong cell.
>
>
>
>  Erik,
>
>  What is a high number ?
>
>  I tried:
>
>   i=0;
> while (i < 10000) {
>
>     gchar *rowname = g_strdup_printf("Row %i", i);
>     gtk_tree_store_append (store, &iter, NULL);
>     gtk_tree_store_set (store, &iter, TITLE_COL, rowname,  -1);
>     i++;
> }
> scroll( tree, "Row 1999");
>
>   And could not duplicate the behaviour you describe.
>
> Have you upgraded to the latest ?
>
> HArring.
>
>
>
>
>
> --- Erik Simonsen <erik pinksheets com> wrote:
> > This is not the first time I've posted this question to the list, and
and
> > much as I hate send it out again, I just have to.  I haven't heard any
> > responses and this problem is so critical and obvious in my app that I
> > really need some help.  This time I've attached some compilable code to
> make
> > it easier to show the problem.
> >
> > First, I populate a GtkTreeStore with a some rows.  Then, I iterate
> through
> > the store, looking for an arbitrary row.  When it finds it, it scrolls
to
> > and selects it.  It works like a charm for low-numbered rows.  For
> > high-numbered rows the correct row is selected, but then scroll doesn't
> work
> > correctly.
> >
> > The strange thing is that when you run the program, you see the treeview
> > scroll to the correct row.  It then pauses there for a while and then
> > scrolls back down to some random row.
> >
> > I'll list the code below for those who don't want to deal with
> attachments.
> > Thanks in advance!
>
> --------------------------------------------------------------------------
> --
> > ----------------
> >
> > #include <gtk/gtk.h>
> > #include <stdio.h>
> > #include <string.h>
> >
> >
> > enum {
> >     TITLE_COL,
> >     NUM_COLUMNS
> > };
> >
> > gint delete_event( GtkWidget *widget,
> >                     GdkEvent  *event,
> >                     gpointer   data )
> > {
> >     gtk_main_quit ();
> >     return TRUE;
> > }
> >
> >
> > void
> > scroll(GtkWidget * tree, char * searchtext) {
> >
> >    GtkTreeModel *store = gtk_tree_view_get_model(GTK_TREE_VIEW(tree));
> >    GtkTreeIter iter;
> >    gboolean valid;
> >    char *rowtext;
> >
> >    valid = gtk_tree_model_get_iter_first (store, &iter);
> >
> >    while (valid) {
> >
> >        gtk_tree_model_get (store, &iter, TITLE_COL, &rowtext, -1);
> >        if (rowtext) {
> >             if (strcmp (rowtext, searchtext) == 0) {
> >                    GtkTreePath *treepath = gtk_tree_model_get_path
(store,
> > &iter);
> >                    gtk_tree_view_set_cursor (GTK_TREE_VIEW(tree),
> treepath,
> > NULL, FALSE);
> >                    gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW(tree),
> > treepath, 0, TRUE, 0.3, 0);
> >                    gtk_tree_path_free(treepath);
> >                    return;
> >             }
> >        }
> >         valid = gtk_tree_model_iter_next(store, &iter);
> >    }
> > }
> >
> >
> > int main( int   argc, char *argv[] )
> > {
> >
> > GtkWidget *window;
> > GtkTreeStore *store;
> >
> > GtkTreeSelection *select;
> >
> > GtkCellRenderer *text_renderer;
> > GtkCellRenderer *pixbuf_renderer;
> > GtkTreeViewColumn *column;
> >
> > GdkPixbuf *buf;
> > int i = 1;
> >
> > GtkWidget *tree;
> > gtk_init (&argc, &argv);
> >
> > /*Set up the toplevel window */
> > window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
> > GtkWidget * tree_scroll;
> > gtk_window_set_title (GTK_WINDOW (window), "scroll_to!");
> > g_signal_connect (G_OBJECT (window), "delete_event",
> > G_CALLBACK (delete_event), NULL);
> >
> >
> > /*Set up the scrolled window */
> > tree_scroll = gtk_scrolled_window_new (NULL, NULL);
> > gtk_widget_ref (tree_scroll);
> > gtk_container_add (GTK_CONTAINER (window), tree_scroll);
> > gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (tree_scroll),
> >         GTK_POLICY_NEVER, GTK_POLICY_NEVER);
> >
> >
> > /*make and populate the tree store*/
> > store = gtk_tree_store_new (NUM_COLUMNS,  G_TYPE_STRING);
> > GtkTreeIter iter;
> >
> > /*define the treeview*/
> > tree = gtk_tree_view_new_with_model( GTK_TREE_MODEL (store));
> > select = gtk_tree_view_get_selection (GTK_TREE_VIEW(tree));
> > gtk_tree_selection_set_mode (select, GTK_SELECTION_MULTIPLE);
> >
> > text_renderer = gtk_cell_renderer_text_new();
> >
> > column = gtk_tree_view_column_new();
> >
> > gtk_tree_view_column_pack_end(column, text_renderer, TRUE);
> >
> > gtk_tree_view_column_add_attribute (column, text_renderer, "text",
> > TITLE_COL);
> >
> > gtk_tree_view_append_column (GTK_TREE_VIEW (tree), column);
> > gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(tree), FALSE);
> > gtk_container_add (GTK_CONTAINER (tree_scroll), tree);
> > gtk_widget_set_size_request (tree, 100, 300);
> >
> > gtk_widget_show(tree);
> > gtk_widget_show (tree_scroll);
> > gtk_widget_show (window);
> >
> > i=0;
> > while (i < 150) {
> >
> >     gchar *rowname = g_strdup_printf("Row %i", i);
> >     gtk_tree_store_append (store, &iter, NULL);
> >     gtk_tree_store_set (store, &iter, TITLE_COL, rowname,  -1);
> >     i++;
> > }
> > scroll( tree, "Row 95");
> >
> > gtk_main ();
> >
> > return 0;
> > }
>
> > ATTACHMENT part 2 application/octet-stream name=scroll.c
>
>
>
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