[no subject]

[Gavin D. Smith]

branch: master
commit 587a878440b753ae1018a83ebcf7088d1ec22e4f
Author: Gavin Smith <gavinsmith0123@gmail.com>
AuthorDate: Tue Oct 22 12:49:33 2019 +0100

    implement help message
---
 js/infog/main.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/js/infog/main.c b/js/infog/main.c
index d516552e6f..3ccfcbad6e 100644
--- a/js/infog/main.c
+++ b/js/infog/main.c
@@ -626,6 +626,29 @@ back_clicked_cb (GtkButton *button, gpointer user_data)
   webkit_web_view_go_back (webView);
 }
 
+void
+help_clicked_cb (GtkButton *button, gpointer user_data)
+{
+  char *help_string =
+    "Summary of key commands\n"
+    "\n"
+    "n\tnext node\n"
+    "p\tprevious node\n"
+    "u\tgo up to parent node\n"
+    "i\tindex search\n"
+    "q\tquit"
+    ;
+
+  GtkDialogFlags flags = GTK_DIALOG_DESTROY_WITH_PARENT;
+  GtkWidget *dialog = gtk_message_dialog_new (GTK_WINDOW(main_window),
+                                  flags,
+                                  GTK_MESSAGE_INFO,
+                                  GTK_BUTTONS_CLOSE,
+                                  "%s", help_string);
+  gtk_dialog_run (GTK_DIALOG (dialog));
+  gtk_widget_destroy (dialog);
+}
+
 void
 build_gui (void)
 {
@@ -647,6 +670,8 @@ build_gui (void)
 
   gtk_header_bar_pack_start (header_bar, back_button);
   help_button = gtk_button_new_with_mnemonic ("_Help");
+  g_signal_connect (help_button, "clicked",
+                    G_CALLBACK(help_clicked_cb), NULL);
   gtk_header_bar_pack_start (header_bar, help_button);
 
   GtkBox *box = GTK_BOX(gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));