I've been working at this for several days now and I'm hoping someone can guide me down the right path. Let me say TIA now.
I have one treeview that displays system information. Clicking a row in this treeview causes a second listview to be populated with the components that comprise the selected system assembly. For example, if Motherboard were selected in treeview 'sys_tree', then the listview 'part_tree' would be populated with microprocessor, etc.
The first time I select an item in the 'sys_tree' treeview, the 'part_tree' listview populates and all is well. The second, and subsequent, selections in the 'sys_tree' treeview don't populate the 'part_tree' listview.
The following is thrown in the terminal.
Quote:
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_iter: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_iter: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_row_reference_new_proxy: assertion `GTK_IS_TREE_MODEL (model)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_iter: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_value: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_set_property: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_value_unset: assertion `G_IS_VALUE (value)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_get_iter: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_unref_node: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): Gtk-CRITICAL **: gtk_tree_model_iter_next: assertion `GTK_IS_TREE_MODEL (tree_model)' failed
(reliafree:32523): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer
(reliafree:32523): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
(reliafree:32523): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer
(reliafree:32523): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
(reliafree:32523): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer
(reliafree:32523): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
(reliafree:32523): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer
(reliafree:32523): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
(reliafree:32523): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer
(reliafree:32523): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
(reliafree:32523): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Using gdb, I've found that they're not being thrown until the program returns to the main loop function g_main_loop_run in gmain.c at (lines 2880-2881)
Code:
while (loop->is_running)
g_main_context_iterate (loop->context, TRUE, TRUE, self);
and then only after 2 or 3 dozen loops.
This is the callback function for the system treeview:
Code:
void system_tree_clicked_cb( GtkTreeView *tree, GdkEventButton *butt )
{
GtkTreeIter iter;
GtkTreePath *path;
GtkTreeSelection *selection;
SELECTED_TREE = 1;
switch ( butt->button )
{
/* Left mouse button was clicked. */
case (1):
/* Get the selected system item. */
selection = gtk_tree_view_get_selection( GTK_TREE_VIEW( sys_tree ) );
if (gtk_tree_selection_get_selected( selection, NULL, &iter ))
{
path = gtk_tree_model_get_path( GTK_TREE_MODEL( sys_store ), &iter );
/* Get the selected item's information from the tree. */
if (gtk_tree_model_get_iter( GTK_TREE_MODEL( sys_store ), &iter, path ) )
{
read_system_tree( GTK_TREE_MODEL( sys_store ),
&path, &iter, NULL );
if ( ! populate_system_general_tab( pSystemItem ) )
{
printf("Error populating the general tab for Assembly %d.\n", pSystemItem.assemblyID );
}
if ( ! populate_part_tree( pSystemItem.assemblyID ) )
{
printf("Error populating the parts list for Assembly %d.\n", pSystemItem.assemblyID );
}
}
/*if ( gtk_tree_view_row_expanded ( GTK_TREE_VIEW( sys_tree ), path ) )
{
gtk_tree_view_collapse_row ( GTK_TREE_VIEW( sys_tree ), path );
}
else
{
gtk_tree_view_expand_row ( GTK_TREE_VIEW( sys_tree ), path, FALSE );
}*/
}
break;
<SNIP> (Just the other three buttons that are unused ATM)
}
return;
}
This is the function that retrieves the components from the MySQL database and populates the listview:
Code:
gboolean populate_part_tree( gint id )
{
GtkTreeIter iter;
gchar query[60];
MYSQL_RES *result;
MYSQL_ROW row=NULL;
/* Clear the previous tree_store then retrieve the system indenture structure
* information. Almost every field is displayed, so we select them all. There's
* nothing top secret in this table. */
gtk_list_store_clear( GTK_LIST_STORE ( part_store ) );
switch ( SELECTED_TREE )
{
case (1):
sprintf( query,"SELECT * FROM PARTS WHERE AssemblyID=%u \
ORDER BY PartID", id );
break;
default:
printf( "Error: Unknown tree selected!\n" );
break;
}
mysql_real_query( &mysqlconn, query, (unsigned int)strlen( query ) );
result = mysql_store_result( &mysqlconn );
/* Do some error checking on the returned results. */
if( result )
{
printf( "Selected %lu rows for parts list.\n",
(unsigned long)mysql_affected_rows( &mysqlconn ) );
}
else
{
fprintf( stderr, "Error %d: %s\n", mysql_errno( &mysqlconn ),
mysql_error( &mysqlconn ) );
return FALSE;
}
/* If there are no records returned, then set some default values as
* placeholders; it's probably a brand new database. Otherwise append a
* row for each record returned and display the associated data. */
if( mysql_num_rows( result ) == 0 )
{
gtk_list_store_append( GTK_LIST_STORE( part_store ), &iter );
gtk_list_store_set( GTK_LIST_STORE( part_store ), &iter,
COLUMN_PN, "Part Num",
COLUMN_REFDES, "Ref Des",
COLUMN_CLASS, "Class",
COLUMN_SUBCLASS, "Subclass",
COLUMN_QUANT, (gint) 1,
COLUMN_HR, (gdouble) 0.0,
COLUMN_ID, (gint) 0,
-1);
}
else
{
while ( ( row = mysql_fetch_row( result ) ) )
{
gtk_list_store_append ( GTK_LIST_STORE( part_store ), &iter );
gtk_list_store_set( GTK_LIST_STORE( part_store ), &iter,
COLUMN_PN, row[6],
COLUMN_REFDES, row[7],
COLUMN_CLASS, row[3],
COLUMN_SUBCLASS, row[4],
COLUMN_QUANT, atoi( row[19] ),
COLUMN_HR, atof( row[34] ),
COLUMN_ID, atoi( row[0] ),
-1);
}
}
mysql_free_result( result );
part_model = GTK_TREE_MODEL( part_store );
gtk_tree_view_set_model( GTK_TREE_VIEW( part_tree ), part_model );
g_object_unref( part_model );
/* Expand all rows of the tree as the default view. */
gtk_tree_view_expand_all( GTK_TREE_VIEW( part_tree ) );
return TRUE;
These are the applicable sections from the Glade file for the two treeviews. Let me know if you need more.
Code:
<SNIP>
<widget class="GtkScrolledWindow" id="system_tree_scroll_window">
<property name="width_request">600</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="shadow_type">GTK_SHADOW_IN</property>
<child>
<widget class="GtkTreeView" id="tree_System">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="tooltip" translatable="yes">Indentured display of the currently selected system tree...</property>
<property name="enable_tree_lines">True</property>
</widget>
</child>
</widget>
<SNIP>
<widget class="GtkScrolledWindow" id="part_list_scroll_window">
<property name="width_request">250</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="shadow_type">GTK_SHADOW_IN</property>
<child>
<widget class="GtkTreeView" id="tree_Parts">
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="tooltip" translatable="yes">List of parts for the currently selected assembly in the system tree ...</property>
<property name="enable_grid_lines">GTK_TREE_VIEW_GRID_LINES_HORIZONTAL</property>
</widget>
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