src/misc/list1.c - main - evo/Gtk4-tutorial

src/misc/list1.c
74 строки3 KB
M0JXD
Add space for all stat =g_application_run
01 ноя 2025, 03:42
01 ноя 2025, 03:424ddec85
#include <gtk/gtk.h>

static void
setup_cb (GtkSignalListItemFactory *self, GtkListItem *listitem, gpointer user_data) {
  GtkWidget *lb = gtk_label_new (NULL);
  gtk_list_item_set_child (listitem, lb);
  /* Because gtk_list_item_set_child sunk the floating reference of lb, releasing (unref) isn't necessary for lb. */
}

static void
bind_cb (GtkSignalListItemFactory *self, GtkListItem *listitem, gpointer user_data) {
  GtkWidget *lb = gtk_list_item_get_child (listitem);
  /* Strobj is owned by the instance. Caller mustn't change or destroy it. */
  GtkStringObject *strobj = gtk_list_item_get_item (listitem);
  /* The string returned by gtk_string_object_get_string is owned by the instance. */
  gtk_label_set_text (GTK_LABEL (lb), gtk_string_object_get_string (strobj));
}

static void
unbind_cb (GtkSignalListItemFactory *self, GtkListItem *listitem, gpointer user_data) {
  /* There's nothing to do here. */
}

static void
teardown_cb (GtkSignalListItemFactory *self, GtkListItem *listitem, gpointer user_data) {
  /* There's nothing to do here. */
  /* GtkListItem instance will be destroyed soon. You don't need to set the child to NULL. */
}

static void
app_activate (GApplication *application) {
  GtkApplication *app = GTK_APPLICATION (application);
  GtkWidget *win = gtk_application_window_new (app);
  gtk_window_set_default_size (GTK_WINDOW (win), 600, 400);
  GtkWidget *scr = gtk_scrolled_window_new ();
  gtk_window_set_child (GTK_WINDOW (win), scr);

  char *array[] = {
    "one", "two", "three", "four", NULL
  };
  /* sl is owned by ns */
  /* ns and factory are owned by lv. */
  /* Therefore, you don't need to care about their destruction. */
  GtkStringList *sl =  gtk_string_list_new ((const char * const *) array);
  GtkNoSelection *ns =  gtk_no_selection_new (G_LIST_MODEL (sl));

  GtkListItemFactory *factory = gtk_signal_list_item_factory_new ();
  g_signal_connect (factory, "setup", G_CALLBACK (setup_cb), NULL);
  g_signal_connect (factory, "bind", G_CALLBACK (bind_cb), NULL);
  /* The following two lines can be left out. The handlers do nothing. */
  g_signal_connect (factory, "unbind", G_CALLBACK (unbind_cb), NULL);
  g_signal_connect (factory, "teardown", G_CALLBACK (teardown_cb), NULL);

  GtkWidget *lv = gtk_list_view_new (GTK_SELECTION_MODEL (ns), factory);
  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scr), lv);
  gtk_window_present (GTK_WINDOW (win));
}

/* ----- main ----- */
#define APPLICATION_ID "com.github.ToshioCP.list1"

int
main (int argc, char **argv) {
  GtkApplication *app;
  int stat;

  app = gtk_application_new (APPLICATION_ID, G_APPLICATION_DEFAULT_FLAGS);

  g_signal_connect (app, "activate", G_CALLBACK (app_activate), NULL);

  stat = g_application_run (G_APPLICATION (app), argc, argv);
  g_object_unref (app);
  return stat;
}