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demo: Use the new GtkListiew::focus-item property

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Show the current date in the weather view.

Shows how awkward it is to use the focus-item when scrolling with the
mouse.
This commit is contained in:
Benjamin Otte
2022-02-14 00:28:40 +01:00
parent 17539d9378
commit 5925cd68ce
1 changed files with 37 additions and 3 deletions
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40
demos/gtk-demo/listview_weather.c
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@@ -268,13 +268,31 @@ bind_widget (GtkSignalListItemFactory *factory,
break;
}
child = gtk_widget_get_next_sibling (child);
s = g_strdup_printf ("%d°", info->temperature);
gtk_label_set_text (GTK_LABEL (child), s);
g_free (s);
}
static gboolean
transform_weather_to_date_string (GBinding *binding,
const GValue *from_value,
GValue *to_value,
gpointer unused)
{
GtkWeatherInfo *info;
GDateTime *timestamp;
info = g_value_get_object (from_value);
if (info == NULL)
return TRUE;
timestamp = g_date_time_new_from_unix_utc (info->timestamp);
g_value_take_string (to_value, g_date_time_format (timestamp, "%x"));
g_date_time_unref (timestamp);
return TRUE;
}
static GtkWidget *window = NULL;
GtkWidget *
@@ -300,7 +318,7 @@ do_listview_weather (GtkWidget *do_widget)
{
if (window == NULL)
{
GtkWidget *listview, *sw;
GtkWidget *listview, *sw, *box, *label;
window = gtk_window_new ();
gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);
@@ -310,10 +328,26 @@ do_listview_weather (GtkWidget *do_widget)
gtk_window_set_title (GTK_WINDOW (window), "Weather");
g_object_add_weak_pointer (G_OBJECT (window), (gpointer *) &window);
box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_window_set_child (GTK_WINDOW (window), box);
label = gtk_label_new ("");
gtk_widget_set_halign (label, GTK_ALIGN_END);
gtk_box_append (GTK_BOX (box), label);
sw = gtk_scrolled_window_new ();
gtk_window_set_child (GTK_WINDOW (window), sw);
gtk_widget_set_vexpand (sw, TRUE);
gtk_box_append (GTK_BOX (box), sw);
listview = create_weather_view ();
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), listview);
g_object_bind_property_full (listview, "focus-item",
label, "label",
G_BINDING_SYNC_CREATE,
transform_weather_to_date_string,
NULL,
NULL,
NULL);
}
if (!gtk_widget_get_visible (window))