On 05-07-2018 11:02, Eduardo M KALINOWSKI wrote:
> Consider the sample attached: it builds a tree model with an item that
> has child items, and uses that model in a ComboBox.
>
> When compiled with Gtk2, when the item with children is selected and
> its children displayed, and extra item representing the parent is
> added to the top, allowing the parent to be selected. The attached
> image should make that clearer.
>
> However, compiled with Gtk3, that item that allows selection of the
> parent is missing, as the other image shows.
>
> So how does one select "Item with children", using the mouse, under
> Gtk3? The item can be selected using the keyboard, but apparently with
> the mouse. Is there a way to get the Gtk2 behaviour back with Gtk3?
The attachments didn't make it, so here's the code:
----
#include <gtk/gtk.h>
GtkTreeModel *create_model()
{
GtkTreeStore *model;
GtkTreeIter iter, child;
model = gtk_tree_store_new(1, G_TYPE_STRING);
gtk_tree_store_append(model, &iter, NULL);
gtk_tree_store_set(model, &iter, 0, "Item with no children", -1);
gtk_tree_store_append(model, &iter, NULL);
gtk_tree_store_set(model, &iter, 0, "Item with children", -1);
gtk_tree_store_append(model, &child, &iter);
gtk_tree_store_set(model, &child, 0, "Child 1", -1);
gtk_tree_store_append(model, &child, &iter);
gtk_tree_store_set(model, &child, 0, "Child 2", -1);
return GTK_TREE_MODEL(model);
}
void on_changed(GtkComboBox *widget, gpointer data)
{
GtkComboBox *combo = widget;
GtkTreeIter iter;
gchar *selected_text;
if (gtk_combo_box_get_active_iter(combo, &iter)) {
gtk_tree_model_get(gtk_combo_box_get_model(combo), &iter,
0, &selected_text, -1);
printf("Selected: %s\n", selected_text);
}
}
GtkWidget *create_combo(GtkTreeModel *model)
{
GtkWidget *combo;
GtkCellRenderer *column;
combo = gtk_combo_box_new_with_model(model);
g_object_unref(model);
column = gtk_cell_renderer_text_new();
gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), column, TRUE);
gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), column,
"text", 0, NULL);
g_signal_connect(combo, "changed", G_CALLBACK(on_changed), NULL);
return combo;
}
int main(int argc, char **argv)
{
GtkWidget *window, *combo;
GtkTreeModel *model;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(window, "delete_event", G_CALLBACK(gtk_main_quit), NULL);
model = create_model();
combo = create_combo(model);
gtk_container_add(GTK_CONTAINER(window), combo);
gtk_widget_show_all(window);
gtk_main();
return 0;
}
---
And the screenshots:
- Gtk2: https://imgur.com/a/kcYx1Wt
- Gtk3: https://imgur.com/a/VsuSz73
--
Kirk to Enterprise -- beam down yeoman Rand and a six-pack.
Eduardo M KALINOWSKI
edua...@kalinowski.com.br
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