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diff --git a/src/libs/gui/ControlGroups.hpp b/src/libs/gui/ControlGroups.hpp
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef CONTROLGROUPS_H
+#define CONTROLGROUPS_H
+
+#include <cassert>
+#include <gtkmm.h>
+#include <libglademm/xml.h>
+#include <libglademm.h>
+#include "client/PortModel.hpp"
+#include <raul/SharedPtr.hpp>
+
+namespace Ingen { namespace Client { class PortModel; } }
+using namespace Ingen::Client;
+
+namespace Ingen {
+namespace GUI {
+
+class ControlPanel;
+class PortPropertiesWindow;
+
+
+/** A group of controls (for a single Port) in a NodeControlWindow.
+ *
+ * \ingroup GUI
+ */
+class ControlGroup : public Gtk::VBox
+{
+public:
+	ControlGroup(BaseObjectType* cobject, const Glib::RefPtr<Gnome::Glade::Xml>& glade_xml);
+	virtual ~ControlGroup();
+	
+	void init(ControlPanel* panel, SharedPtr<PortModel> pm);
+	
+	inline const SharedPtr<PortModel> port_model() const { return _port_model; }
+
+protected:
+	friend class PortPropertiesWindow;
+
+	virtual void set_value(float value) = 0;
+	virtual void set_range(float min, float max) {}
+
+	ControlPanel*        _control_panel;
+	SharedPtr<PortModel> _port_model;
+	sigc::connection     _control_connection;
+	bool                 _enable_signal;
+};
+
+
+/** A slider for a continuous control.
+ *
+ * \ingroup GUI
+ */
+class SliderControlGroup : public ControlGroup
+{
+public:
+	SliderControlGroup(BaseObjectType* cobject, const Glib::RefPtr<Gnome::Glade::Xml>& glade_xml);
+	void init(ControlPanel* panel, SharedPtr<PortModel> pm);
+
+	void enable();
+	void disable();
+	
+	void set_min(float val);
+	void set_max(float val);
+
+private:
+	void set_name(const string& name);
+
+	bool clicked(GdkEventButton* ev);
+
+	void set_value(float value);
+	void set_range(float min, float max);
+
+	void update_range();
+	void update_value_from_slider();
+	void update_value_from_spinner();
+
+	void menu_properties();
+	
+	bool slider_pressed(GdkEvent* ev);
+
+	bool _enabled;
+	
+	Gtk::Label*      _name_label;
+	Gtk::SpinButton* _value_spinner;
+	Gtk::HScale*     _slider;
+	
+	Gtk::Menu*      _menu;
+	Gtk::MenuItem*  _menu_properties;
+};
+
+
+#if 0
+
+/** A spinbutton for integer controls.
+ * 
+ * \ingroup GUI
+ */
+class IntegerControlGroup : public ControlGroup
+{
+public:
+	IntegerControlGroup(ControlPanel* panel, SharedPtr<PortModel> pm);
+	
+	void enable();
+	void disable();
+	
+private:
+	void set_name(const string& name);
+	void set_value(float val);
+
+	void update_value();
+	
+	bool            _enable_signal;
+	Gtk::Alignment  _alignment;
+	Gtk::Label      _name_label;
+	Gtk::SpinButton _spinner;
+};
+
+
+/** A radio button for toggle controls.
+ * 
+ * \ingroup GUI
+ */
+class ToggleControlGroup : public ControlGroup
+{
+public:
+	ToggleControlGroup(ControlPanel* panel, SharedPtr<PortModel> pm);
+	
+	void enable();
+	void disable();
+	
+private:
+	void set_name(const string& name);
+	void set_value(float val);
+
+	void update_value();
+	
+	bool             _enable_signal;
+	Gtk::Alignment   _alignment;
+	Gtk::Label       _name_label;
+	Gtk::CheckButton _checkbutton;
+};
+#endif
+
+} // namespace GUI
+} // namespace Ingen
+
+#endif // CONTROLGROUPS_H