让GtkComboBox条目为Pixbuf或String

#include <gtk/gtk.h>

enum {
  PIXBUF_COLUMN,
  STRING_COLUMN,
  NUM_COLUMNS
};

int main(int argc, char *argv[]) {
  gtk_init(&argc, &argv);

  // 创建一个GtkListStore作为模型
  GtkListStore *store = gtk_list_store_new(NUM_COLUMNS, GDK_TYPE_PIXBUF, G_TYPE_STRING);

  // 添加Pixbuf类型的条目
  GdkPixbuf *pixbuf1 = gdk_pixbuf_new_from_file("image1.png", NULL);
  GtkTreeIter iter1;
  gtk_list_store_append(store, &iter1);
  gtk_list_store_set(store, &iter1, PIXBUF_COLUMN, pixbuf1, -1);

  GdkPixbuf *pixbuf2 = gdk_pixbuf_new_from_file("image2.png", NULL);
  GtkTreeIter iter2;
  gtk_list_store_append(store, &iter2);
  gtk_list_store_set(store, &iter2, PIXBUF_COLUMN, pixbuf2, -1);

  // 添加String类型的条目
  GtkTreeIter iter3;
  gtk_list_store_append(store, &iter3);
  gtk_list_store_set(store, &iter3, STRING_COLUMN, "Item 1", -1);

  GtkTreeIter iter4;
  gtk_list_store_append(store, &iter4);
  gtk_list_store_set(store, &iter4, STRING_COLUMN, "Item 2", -1);

  // 创建GtkComboBox，并设置模型
  GtkWidget *combo_box = gtk_combo_box_new_with_model(GTK_TREE_MODEL(store));

  // 创建用于显示Pixbuf的GtkCellRendererPixbuf
  GtkCellRenderer *renderer_pixbuf = gtk_cell_renderer_pixbuf_new();
  gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo_box), renderer_pixbuf, FALSE);
  gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo_box), renderer_pixbuf, "pixbuf", PIXBUF_COLUMN, NULL);

  // 创建用于显示String的GtkCellRendererText
  GtkCellRenderer *renderer_text = gtk_cell_renderer_text_new();
  gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo_box), renderer_text, TRUE);
  gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo_box), renderer_text, "text", STRING_COLUMN, NULL);

  // 显示窗口和组件
  GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_container_add(GTK_CONTAINER(window), combo_box);
  gtk_widget_show_all(window);

  gtk_main();

  return 0;
}