Alvin Delagon

/*
 * File: textedit.c
 * Author: Alvin Delagon
 * Summary: This is a shameful take to learn GTK+ programming in C
 *
 */

#include <gtk/gtk.h>
#include <glade/glade.h>
#include <gio/gio.h>

void on_save(GtkWidget *widget, GtkTextBuffer *txtbuffer)
{
  GtkWindow *window;
  GtkWidget *dialog;
  dialog = gtk_file_chooser_dialog_new("Save File",
                       window,
                       GTK_FILE_CHOOSER_ACTION_SAVE,
                       GTK_STOCK_CANCEL,
                       GTK_RESPONSE_CANCEL,
                       GTK_STOCK_SAVE,
                       GTK_RESPONSE_ACCEPT,
                       NULL);
  if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
    {
      GFile *file = NULL;
      GFileOutputStream *stream = NULL;
      GError *error;
      GtkTextIter start;
      GtkTextIter end;
      GFileCreateFlags flags;
      char *filename;
      gchar *buffer;
      gsize count;
      filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
      file = g_file_new_for_path (filename);
      stream = g_file_replace (file, NULL, TRUE, flags, NULL, &error);
      gtk_text_buffer_get_start_iter (txtbuffer, &start);
      gtk_text_buffer_get_end_iter (txtbuffer, &end);
      buffer = gtk_text_buffer_get_text (txtbuffer,
                     &start,
                     &end,
                     TRUE);
      count = gtk_text_buffer_get_char_count (txtbuffer);
      g_output_stream_write (G_OUTPUT_STREAM (stream), buffer, count, NULL, &error);
    }
  gtk_widget_destroy (dialog);
}


void on_open(GtkWidget *widget, GtkTextBuffer *txtbuffer)
{
  GtkWindow *window;
  GtkWidget *dialog;
  dialog = gtk_file_chooser_dialog_new("Open File",
                       window,
                       GTK_FILE_CHOOSER_ACTION_OPEN,
                       GTK_STOCK_CANCEL,
                       GTK_RESPONSE_CANCEL,
                       GTK_STOCK_OPEN,
                       GTK_RESPONSE_ACCEPT,
                       NULL);
  if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
    {
      char *filename;
      char *buffer;
      filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
      GFile *file = NULL;
      GFileInputStream *stream = NULL;
      GError *error;
      GtkTextIter iter;
      gssize bytes_read;
      gboolean is_reading = TRUE;
      file = g_file_new_for_path (filename);
      stream = g_file_read (file, NULL, &error);
      buffer = g_malloc (1024);
      gtk_text_buffer_set_text (txtbuffer, "", -1);
      while (is_reading)
    {
      bytes_read = g_input_stream_read (G_INPUT_STREAM (stream), buffer, 1024, NULL, &error);
      gtk_text_buffer_get_end_iter (txtbuffer, &iter);
      gtk_text_buffer_insert (txtbuffer, &iter, buffer, bytes_read);
      if (bytes_read == 0)
        is_reading = FALSE;
    }
    }
  gtk_widget_destroy (dialog);
}

void on_exit(GtkWidget *widget, gpointer gdata)
{
  gtk_main_quit();
}

int main(int argc, char *argv[])
{
  GladeXML *main_window;
  GtkWidget *widget;
  GtkTextBuffer *txtbuffer;
  gtk_init (&argc, &argv);
  main_window = glade_xml_new ("data/textedit.glade", NULL, NULL);
  widget = glade_xml_get_widget (main_window, "TextViewMain");
  txtbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (widget));

  /* Main Window Event Handlers */
  widget = glade_xml_get_widget (main_window, "MainWindow");
  g_signal_connect (G_OBJECT (widget),
            "delete_event",
            G_CALLBACK (on_exit),
            NULL);

  /* Menu Item Handlers */
  widget = glade_xml_get_widget (main_window, "OpenItem");
  g_signal_connect (G_OBJECT (widget),
            "activate",
            G_CALLBACK (on_open),
            txtbuffer);
  widget = glade_xml_get_widget (main_window, "SaveItem");
  g_signal_connect (G_OBJECT (widget),
            "activate",
            G_CALLBACK (on_save),
            txtbuffer);
  widget = glade_xml_get_widget (main_window, "ExitItem");
  g_signal_connect (G_OBJECT (widget),
            "activate",
            G_CALLBACK (on_exit),
            NULL);
  gtk_main();
  return 0;
}