Initial revision

src/error.c

@@ -0,0 +1,22 @@
+// SPDX-FileCopyrightText: 2022 Geoffrey D. Bennett <g@b4.vu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "error.h"
+
+void show_error(GtkWindow *w, char *s) {
+  if (!w) {
+    printf("%s\n", s);
+    return;
+  }
+
+  GtkWidget *dialog = gtk_message_dialog_new(
+    w,
+    GTK_DIALOG_DESTROY_WITH_PARENT | GTK_DIALOG_MODAL,
+    GTK_MESSAGE_ERROR,
+    GTK_BUTTONS_CLOSE,
+    s
+  );
+  gtk_widget_show(dialog);
+
+  g_signal_connect(dialog, "response", G_CALLBACK(gtk_window_destroy), NULL);
+}