File Selections

GTK+ 2.0 Tutorial
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# File Selections

The file selection widget is a quick and simple way to display a File dialog box. It comes complete with Ok, Cancel, and Help buttons, a great way to cut down on programming time.

To create a new file selection box use:

    GtkWidget *gtk_file_selection_new( const gchar *title );

To set the filename, for example to bring up a specific directory, or give a default filename, use this function:

    void gtk_file_selection_set_filename( GtkFileSelection *filesel,
                                          const gchar      *filename );

To grab the text that the user has entered or clicked on, use this function:

    gchar *gtk_file_selection_get_filename( GtkFileSelection *filesel );

There are also pointers to the widgets contained within the file selection widget. These are:

      dir_list
      file_list
      selection_entry
      selection_text
      main_vbox
      ok_button
      cancel_button
      help_button

Most likely you will want to use the ok_button, cancel_button, and help_button pointers in signaling their use.

Included here is an example stolen from `testgtk.c`, modified to run on its own. As you will see, there is nothing much to creating a file selection widget. While in this example the Help button appears on the screen, it does nothing as there is not a signal attached to it.

    #include <gtk/gtk.h>

    /* Get the selected filename and print it to the console */
    static void file_ok_sel( GtkWidget        *w,
                             GtkFileSelection *fs )
    {
        g_print ("%s\n", gtk_file_selection_get_filename (GTK_FILE_SELECTION (fs)));
    }

    int main( int   argc,
              char *argv[] )
    {
        GtkWidget *filew;

        gtk_init (&argc, &argv);

        /* Create a new file selection widget */
        filew = gtk_file_selection_new ("File selection");

        g_signal_connect (filew, "destroy",
    	              G_CALLBACK (gtk_main_quit), NULL);
        /* Connect the ok_button to file_ok_sel function */
        g_signal_connect (GTK_FILE_SELECTION (filew)->ok_button,
    		      "clicked", G_CALLBACK (file_ok_sel), (gpointer) filew);

        /* Connect the cancel_button to destroy the widget */
        g_signal_connect_swapped (GTK_FILE_SELECTION (filew)->cancel_button,
    	                      "clicked", G_CALLBACK (gtk_widget_destroy),
    			      filew);

        /* Lets set the filename, as if this were a save dialog, and we are giving
         a default filename */
        gtk_file_selection_set_filename (GTK_FILE_SELECTION(filew),
    				     "penguin.png");

        gtk_widget_show (filew);
        gtk_main ();
        return 0;
    }

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