How to add FileFilter to FileDialog GTK4

Question

Could someone explain me, how to add FileFilter to FileDialog GTK4?

I think, I have a wrong decision, it's not working.

Ive created GTKFileFilter* object and trying to add it to GTKFileDialog* object:

GtkFileDialog* fileDialog=gtk_file_dialog_new();
GtkFileFilter* filefilter = gtk_file_filter_new();
gtk_file_filter_add_suffix(filefilter,"tsc");
gtk_file_filter_set_name(filefilter,"Simple");
gtk_file_dialog_set_filters(fileDialog,filefilter);

But gtk_file_dialog_set_filters() expect a GListModel* as second parameter, so I've got assertion:

Gtk-CRITICAL **: 09:44:48.986: gtk_file_dialog_set_filters: assertion 'filters == NULL || G_IS_LIST_MODEL (filters)' failed

How can I create a right filters?

Answer 1

I tried it out and here is my suggestion.

#include<gtk/gtk.h>


  GtkFileDialog *filedialog = gtk_file_dialog_new();

  GtkFileFilter* filefilter = gtk_file_filter_new();
  gtk_file_filter_add_suffix(filefilter,"txt");
  gtk_file_filter_set_name(filefilter,"Text");

  GtkFileFilter *filefilter1 = gtk_file_filter_new();
  gtk_file_filter_add_suffix(filefilter1,"c");
  gtk_file_filter_set_name(filefilter1,"c-file");

  GListStore* liststore = g_list_store_new (GTK_TYPE_FILE_FILTER);
  g_list_store_append(liststore, filefilter);
  g_list_store_append(liststore, filefilter1);

  gtk_file_dialog_set_filters(filedialog,G_LIST_MODEL(liststore));

  gtk_file_dialog_open(filedialog,GTK_WINDOW(window),NULL,NULL,NULL);

The implementation of a list model can also be found here

https://stackoverflow.com/a/77759424/22768315

https://stackoverflow.com/a/78185115/22768315

https://stackoverflow.com/a/77619798/22768315

Regards