FlowCanvas 0.5.1
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00001 /* This file is part of FlowCanvas. 00002 * Copyright (C) 2007 Dave Robillard <http://drobilla.net> 00003 * 00004 * FlowCanvas is free software; you can redistribute it and/or modify it under the 00005 * terms of the GNU General Public License as published by the Free Software 00006 * Foundation; either version 2 of the License, or (at your option) any later 00007 * version. 00008 * 00009 * FlowCanvas is distributed in the hope that it will be useful, but WITHOUT ANY 00010 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 00011 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details. 00012 * 00013 * You should have received a copy of the GNU General Public License along 00014 * with this program; if not, write to the Free Software Foundation, Inc., 00015 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA 00016 */ 00017 00018 #ifndef FLOWCANVAS_CANVAS_HPP 00019 #define FLOWCANVAS_CANVAS_HPP 00020 00021 #include <list> 00022 #include <boost/enable_shared_from_this.hpp> 00023 #include <boost/utility.hpp> 00024 #include <libgnomecanvasmm.h> 00025 #include <flowcanvas/Connection.hpp> 00026 #include <flowcanvas/Module.hpp> 00027 #include <flowcanvas/Item.hpp> 00028 00029 00034 namespace FlowCanvas { 00035 00036 class Port; 00037 class Module; 00038 00039 00053 class Canvas : boost::noncopyable 00054 , public boost::enable_shared_from_this<Canvas> 00055 , public /*CANVASBASE*/Gnome::Canvas::CanvasAA 00056 // (CANVASBASE is a hook for a sed script in configure.ac) 00057 { 00058 public: 00059 Canvas(double width, double height); 00060 virtual ~Canvas(); 00061 00062 void destroy(); 00063 00064 void add_item(boost::shared_ptr<Item> i); 00065 bool remove_item(boost::shared_ptr<Item> i); 00066 00067 boost::shared_ptr<Connection> 00068 get_connection(boost::shared_ptr<Connectable> tail, 00069 boost::shared_ptr<Connectable> head) const; 00070 00071 bool add_connection(boost::shared_ptr<Connectable> tail, 00072 boost::shared_ptr<Connectable> head, 00073 uint32_t color); 00074 00075 bool add_connection(boost::shared_ptr<Connection> connection); 00076 00077 boost::shared_ptr<Connection> remove_connection(boost::shared_ptr<Connectable> tail, 00078 boost::shared_ptr<Connectable> head); 00079 00080 void set_default_placement(boost::shared_ptr<Module> m); 00081 00082 void clear_selection(); 00083 void select_item(boost::shared_ptr<Item> item); 00084 void unselect_ports(); 00085 void unselect_item(boost::shared_ptr<Item> item); 00086 void unselect_connection(Connection* c); 00087 00088 ItemList& items() { return _items; } 00089 ItemList& selected_items() { return _selected_items; } 00090 ConnectionList& connections() { return _connections; } 00091 ConnectionList& selected_connections() { return _selected_connections; } 00092 00093 void lock(bool l); 00094 bool locked() const { return _locked; } 00095 00096 double get_zoom() { return _zoom; } 00097 void set_zoom(double pix_per_unit); 00098 void zoom_full(); 00099 00100 void render_to_dot(const std::string& filename); 00101 virtual void arrange(bool use_length_hints=false); 00102 00103 double width() const { return _width; } 00104 double height() const { return _height; } 00105 00106 void resize(double width, double height); 00107 void resize_all_items(); 00108 00111 ArtVpathDash* select_dash() { return _select_dash; } 00112 00114 virtual void connect(boost::shared_ptr<Connectable> /*tail*/, 00115 boost::shared_ptr<Connectable> /*head*/) {} 00116 00118 virtual void disconnect(boost::shared_ptr<Connectable> /*tail*/, 00119 boost::shared_ptr<Connectable> /*head*/) {} 00120 00121 protected: 00122 ItemList _items; 00123 ConnectionList _connections; 00124 std::list< boost::shared_ptr<Item> > _selected_items; 00125 std::list< boost::shared_ptr<Connection> > _selected_connections; 00126 00127 virtual bool canvas_event(GdkEvent* event); 00128 virtual bool frame_event(GdkEvent* ev); 00129 00130 private: 00131 00132 friend class Module; 00133 bool port_event(GdkEvent* event, boost::weak_ptr<Port> port); 00134 00135 void remove_connection(boost::shared_ptr<Connection> c); 00136 bool are_connected(boost::shared_ptr<const Connectable> tail, 00137 boost::shared_ptr<const Connectable> head); 00138 00139 void select_port(boost::shared_ptr<Port> p, bool unique = false); 00140 void select_port_toggle(boost::shared_ptr<Port> p, int mod_state); 00141 void unselect_port(boost::shared_ptr<Port> p); 00142 void selection_joined_with(boost::shared_ptr<Port> port); 00143 void join_selection(); 00144 00145 boost::shared_ptr<Port> get_port_at(double x, double y); 00146 00147 bool scroll_drag_handler(GdkEvent* event); 00148 virtual bool select_drag_handler(GdkEvent* event); 00149 virtual bool connection_drag_handler(GdkEvent* event); 00150 00151 void ports_joined(boost::shared_ptr<Port> port1, boost::shared_ptr<Port> port2); 00152 bool animate_selected(); 00153 00154 void scroll_to_center(); 00155 void on_parent_changed(Gtk::Widget* old_parent); 00156 sigc::connection _parent_event_connection; 00157 00158 typedef std::list< boost::shared_ptr<Port> > SelectedPorts; 00159 SelectedPorts _selected_ports; 00160 boost::shared_ptr<Port> _connect_port; 00161 boost::shared_ptr<Port> _last_selected_port; 00162 00163 double _zoom; 00164 double _width; 00165 double _height; 00166 00167 enum DragState { NOT_DRAGGING, CONNECTION, SCROLL, SELECT }; 00168 DragState _drag_state; 00169 00170 bool _remove_objects; // flag to avoid removing objects from destructors when unnecessary 00171 bool _locked; 00172 00173 Gnome::Canvas::Rect _base_rect; 00174 Gnome::Canvas::Rect* _select_rect; 00175 ArtVpathDash* _select_dash; 00176 }; 00177 00178 00179 } // namespace FlowCanvas 00180 00181 #endif // FLOWCANVAS_CANVAS_HPP