FlowCanvas 0.7.1
|
00001 /* This file is part of FlowCanvas. 00002 * Copyright (C) 2007-2009 David 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_ITEM_HPP 00019 #define FLOWCANVAS_ITEM_HPP 00020 00021 #include <algorithm> 00022 #include <list> 00023 #include <map> 00024 #include <string> 00025 00026 #include <boost/enable_shared_from_this.hpp> 00027 #include <boost/shared_ptr.hpp> 00028 00029 #include <libgnomecanvasmm.h> 00030 00031 #include "flowcanvas/Port.hpp" 00032 00033 namespace FlowCanvas { 00034 00035 class Canvas; 00036 00037 00042 class Item : public Gnome::Canvas::Group 00043 , public boost::enable_shared_from_this<Item> 00044 { 00045 public: 00046 Item(boost::shared_ptr<Canvas> canvas, 00047 const std::string& name, 00048 double x, 00049 double y, 00050 uint32_t color); 00051 00052 virtual ~Item() {} 00053 00054 bool selected() const { return _selected; } 00055 virtual void set_selected(bool s); 00056 00057 virtual void set_minimum_width(double w) { _minimum_width = w; } 00058 00059 virtual void select_tick() = 0; 00060 00061 virtual void move(double dx, double dy) = 0; 00062 00063 virtual void zoom(double z) {} 00064 boost::weak_ptr<Canvas> canvas() const { return _canvas; } 00065 00066 bool popup_menu(guint button, guint32 activate_time) { 00067 if ( ! _menu) 00068 create_menu(); 00069 if (_menu) { 00070 _menu->popup(button, activate_time); 00071 return true; 00072 } else { 00073 return false; 00074 } 00075 } 00076 00077 virtual void create_menu() {} 00078 00079 Gtk::Menu* menu() const { return _menu; } 00080 void set_menu(Gtk::Menu* m) { delete _menu; _menu = m; } 00081 00082 double width() const { return _width; } 00083 double height() const { return _height; } 00084 00085 virtual void resize() = 0; 00086 00087 virtual void load_location() {} 00088 virtual void store_location() {} 00089 00090 bool is_within(const Gnome::Canvas::Rect& rect) const; 00091 inline bool point_is_within(double x, double y) const; 00092 00093 const std::string& name() const { return _name; } 00094 virtual void set_name(const std::string& n) { _name = n; } 00095 00096 uint32_t base_color() const { return _color; } 00097 virtual void set_border_color(uint32_t c) { _border_color = c; } 00098 virtual void set_base_color(uint32_t c) { _color = c; } 00099 virtual void set_default_base_color() = 0; 00100 00109 void set_partner(boost::shared_ptr<Item> partner) { _partner = partner; } 00110 boost::weak_ptr<Item> partner() { return _partner; } 00111 00112 sigc::signal<void> signal_pointer_entered; 00113 sigc::signal<void> signal_pointer_exited; 00114 sigc::signal<void> signal_selected; 00115 sigc::signal<void> signal_unselected; 00116 00117 sigc::signal<void, GdkEventButton*> signal_clicked; 00118 sigc::signal<void, GdkEventButton*> signal_double_clicked; 00119 00120 sigc::signal<void, double, double> signal_dragged; 00121 sigc::signal<void, double, double> signal_dropped; 00122 00123 protected: 00124 virtual void on_drag(double dx, double dy); 00125 virtual void on_drop(); 00126 virtual void on_click(GdkEventButton* ev); 00127 virtual void on_double_click(GdkEventButton* ev); 00128 00129 virtual void set_height(double h) = 0; 00130 virtual void set_width(double w) = 0; 00131 00132 bool on_event(GdkEvent* event); 00133 00134 const boost::weak_ptr<Canvas> _canvas; 00135 00136 boost::weak_ptr<Item> _partner; 00137 00138 Gtk::Menu* _menu; 00139 std::string _name; 00140 double _minimum_width; 00141 double _width; 00142 double _height; 00143 uint32_t _border_color; 00144 uint32_t _color; 00145 bool _selected :1; 00146 }; 00147 00148 00149 typedef std::list<boost::shared_ptr<Item> > ItemList; 00150 00151 00154 inline bool 00155 Item::point_is_within(double x, double y) const 00156 { 00157 return (x > property_x() && x < property_x() + _width 00158 && y > property_y() && y < property_y() + _height); 00159 } 00160 00161 00162 inline bool 00163 Item::is_within(const Gnome::Canvas::Rect& rect) const 00164 { 00165 const double x1 = rect.property_x1(); 00166 const double y1 = rect.property_y1(); 00167 const double x2 = rect.property_x2(); 00168 const double y2 = rect.property_y2(); 00169 00170 if (x1 < x2 && y1 < y2) { 00171 return (property_x() > x1 00172 && property_y() > y1 00173 && property_x() + width() < x2 00174 && property_y() + height() < y2); 00175 } else if (x2 < x1 && y2 < y1) { 00176 return (property_x() > x2 00177 && property_y() > y2 00178 && property_x() + width() < x1 00179 && property_y() + height() < y1); 00180 } else if (x1 < x2 && y2 < y1) { 00181 return (property_x() > x1 00182 && property_y() > y2 00183 && property_x() + width() < x2 00184 && property_y() + height() < y1); 00185 } else if (x2 < x1 && y1 < y2) { 00186 return (property_x() > x2 00187 && property_y() > y1 00188 && property_x() + width() < x1 00189 && property_y() + height() < y2); 00190 } else { 00191 return false; 00192 } 00193 } 00194 00195 } // namespace FlowCanvas 00196 00197 #endif // FLOWCANVAS_ITEM_HPP 00198