X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fgtkmm2ext%2Fprompter.cc;h=03cfb25be41f905a3078fbda1c603c6ad79553c0;hb=4dc63966f0872efe768dad61eb9b8785d06b92d1;hp=508e509868496faeab13afe07b75921d3a0c7ef9;hpb=8ca561f8d322d237d7aaa74ebf82f6892064da94;p=ardour.git

diff --git a/libs/gtkmm2ext/prompter.cc b/libs/gtkmm2ext/prompter.cc
index 508e509868..03cfb25be4 100644
--- a/libs/gtkmm2ext/prompter.cc
+++ b/libs/gtkmm2ext/prompter.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 1999 Paul Barton-Davis 
+    Copyright (C) 1999 Paul Barton-Davis
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -32,12 +32,16 @@ using namespace Gtkmm2ext;
 
 Prompter::Prompter (Gtk::Window& parent, bool modal)
 	: Gtk::Dialog ("", parent, modal)
+	, first_show (true)
+	, can_accept_from_entry (false)
 {
 	init ();
 }
 
 Prompter::Prompter (bool modal)
 	: Gtk::Dialog ("", modal)
+	, first_show (true)
+	, can_accept_from_entry (false)
 {
 	init ();
 }
@@ -48,14 +52,15 @@ Prompter::init ()
 	set_type_hint (Gdk::WINDOW_TYPE_HINT_DIALOG);
 	set_position (Gtk::WIN_POS_MOUSE);
 	set_name ("Prompter");
-
-	set_default_response (Gtk::RESPONSE_ACCEPT);
 	
 	add_button (Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
 
-	/* 
+	/*
 	   Alas a generic 'affirmative' button seems a bit useless sometimes.
 	   You will have to add your own.
+	   After adding, use :
+	   set_response_sensitive (Gtk::RESPONSE_ACCEPT, false)
+	   to prevent the RESPONSE_ACCEPT button from permitting blank strings.
 	*/
 	
 	entryLabel.set_line_wrap (true);
@@ -64,17 +69,32 @@ Prompter::init ()
 	entryBox.set_homogeneous (false);
 	entryBox.set_spacing (5);
 	entryBox.set_border_width (10);
-	entryBox.pack_start (entryLabel);
-	entryBox.pack_start (entry, false, false);
+	entryBox.pack_start (entryLabel, false, false);
+	entryBox.pack_start (entry, true, true);
 
 	get_vbox()->pack_start (entryBox);
 	show_all_children();
-
-	entry.signal_activate().connect (bind (mem_fun (*this, &Prompter::response), Gtk::RESPONSE_ACCEPT));
 }	
 
 void
-Prompter::change_labels (string okstr, string cancelstr)
+Prompter::on_show ()
+{
+	/* don't connect to signals till shown, so that we don't change the
+	   response sensitivity etc. when the setup of the dialog sets the text.
+	*/
+
+	if (first_show) {
+		entry.signal_changed().connect (mem_fun (*this, &Prompter::on_entry_changed));
+		entry.signal_activate().connect (mem_fun (*this, &Prompter::entry_activated));
+		can_accept_from_entry = !entry.get_text().empty();
+		first_show = false;
+	}
+
+	Dialog::on_show ();
+}
+
+void
+Prompter::change_labels (string /*okstr*/, string /*cancelstr*/)
 {
 	// dynamic_cast<Gtk::Label*>(ok.get_child())->set_text (okstr);
 	// dynamic_cast<Gtk::Label*>(cancel.get_child())->set_text (cancelstr);
@@ -85,6 +105,35 @@ Prompter::get_result (string &str, bool strip)
 {
 	str = entry.get_text ();
 	if (strip) {
-		strip_whitespace_edges (str);
+		PBD::strip_whitespace_edges (str);
+	}
+}
+
+void
+Prompter::entry_activated ()
+{
+	if (can_accept_from_entry) {
+		response (Gtk::RESPONSE_ACCEPT);
+	} else {
+		response (Gtk::RESPONSE_CANCEL);
+	}
+}		
+
+void
+Prompter::on_entry_changed ()
+{
+	/*
+	   This is set up so that entering text in the entry
+	   field makes the RESPONSE_ACCEPT button active.
+	   Of course if you haven't added a RESPONSE_ACCEPT
+	   button, nothing will happen at all.
+	*/
+
+	if (!entry.get_text().empty()) {
+		set_response_sensitive (Gtk::RESPONSE_ACCEPT, true);
+		set_default_response (Gtk::RESPONSE_ACCEPT);
+		can_accept_from_entry = true;
+	} else {
+		set_response_sensitive (Gtk::RESPONSE_ACCEPT, false);
 	}
 }