introduce GUIObjectState; massive, pervasive changes in visibility and height management for track displays in the editor

git-svn-id: svn://localhost/ardour2/branches/3.0@9796 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 142 insertions, 0 deletions

diff --git a/gtk2_ardour/gui_object.cc b/gtk2_ardour/gui_object.cc
new file mode 100644
index 0000000000..857ee3a770
--- /dev/null
+++ b/gtk2_ardour/gui_object.cc
@@ -0,0 +1,142 @@
+/*
+    Copyright (C) 2011 Paul 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
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <iostream>
+#include <iomanip>
+#include <sstream>
+
+#include <boost/variant/static_visitor.hpp>
+
+#include "gui_object.h"
+#include "i18n.h"
+
+using std::string;
+
+const string GUIObjectState::xml_node_name (X_("GUIObjectState"));
+
+GUIObjectState::~GUIObjectState ()
+{
+	clear_maps ();
+}
+
+void
+GUIObjectState::clear_maps ()
+{
+	_property_maps.clear ();
+}
+
+class gos_string_vistor : public boost::static_visitor<> {
+  public:
+    gos_string_vistor (std::ostream& o) 
+	    : stream (o) {}
+	    
+    void operator() (const int64_t& i) {
+	    stream << i;
+    }
+#if 0
+    void operator() (const double& d) {
+	    stream << std::setprecision (12) << d;
+    }
+#endif
+
+    void operator() (const std::string& s) {
+	    stream << s;
+    }
+
+  private:
+    std::ostream& stream;
+};
+
+XMLNode&
+GUIObjectState::get_state () const
+{
+	XMLNode* root = new XMLNode (xml_node_name);
+	
+	for (StringPropertyMap::const_iterator i = _property_maps.begin(); i != _property_maps.end(); ++i) {
+
+		const PropertyMap& pmap (i->second);
+		XMLNode* id_node = new XMLNode (X_("Object"));
+		
+		id_node->add_property ("id", i->first);
+		
+		for (PropertyMap::const_iterator p = pmap.begin(); p != pmap.end(); ++p) {
+			std::stringstream ss;
+			gos_string_vistor gsv (ss);
+			boost::apply_visitor (gsv, p->second);
+			id_node->add_property (p->first.c_str(), ss.str());
+		}
+		
+		root->add_child_nocopy (*id_node);
+	}
+
+
+	return *root;
+}
+
+int
+GUIObjectState::set_state (const XMLNode& node)
+{
+	if (node.name() != xml_node_name) {
+		return -1;
+	}
+	
+	clear_maps ();
+	
+	for (XMLNodeList::const_iterator i = node.children().begin(); i != node.children().end(); ++i) {
+		if ((*i)->name() == X_("Object")) {
+
+			XMLNode* child = (*i);
+			const XMLProperty* idp = child->property (X_("id"));
+
+			if (!idp) {
+				continue;
+			}
+
+			string id (idp->value());
+			
+			for (XMLPropertyList::const_iterator p = child->properties().begin(); p != child->properties().end(); ++p) {
+				/* note that this always sets the property with
+				   a string value, and so is not equivalent to
+				   a call made by the program that passed a
+				   scalar.
+				*/
+				if ((*p)->name() != X_("id")) {
+					set (id, (*p)->name(), (*p)->value());
+				}
+			}
+		}
+	}
+
+	return 0;
+}
+
+
+void
+GUIObjectState::load (const XMLNode& node)
+{
+	(void) set_state (node);
+}
+
+GUIObjectState&
+GUIObjectState::operator= (const GUIObjectState& other)
+{
+	_property_maps = other._property_maps;
+
+	return *this;
+}