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_ITEM_HPP 00019 #define FLOWCANVAS_ITEM_HPP 00020 00021 #include <string> 00022 #include <map> 00023 #include <algorithm> 00024 #include <boost/shared_ptr.hpp> 00025 #include <boost/enable_shared_from_this.hpp> 00026 #include <libgnomecanvasmm.h> 00027 #include <flowcanvas/Port.hpp> 00028 00029 namespace FlowCanvas { 00030 00031 class Canvas; 00032 00033 00038 class Item : public Gnome::Canvas::Group 00039 , public boost::enable_shared_from_this<Item> 00040 { 00041 public: 00042 Item(boost::shared_ptr<Canvas> canvas, 00043 const std::string& name, 00044 double x, 00045 double y, 00046 uint32_t color); 00047 00048 virtual ~Item() {} 00049 00050 bool selected() const { return _selected; } 00051 virtual void set_selected(bool s); 00052 00053 virtual void set_minimum_width(double w) { _minimum_width = w; } 00054 00055 virtual void select_tick() = 0; 00056 00057 virtual void move(double dx, double dy) = 0; 00058 00059 virtual void zoom(double) {} 00060 boost::weak_ptr<Canvas> canvas() const { return _canvas; } 00061 00062 bool popup_menu(guint button, guint32 activate_time) { 00063 if ( ! _menu) 00064 create_menu(); 00065 if (_menu) { 00066 _menu->popup(button, activate_time); 00067 return true; 00068 } else { 00069 return false; 00070 } 00071 } 00072 00073 virtual void create_menu() {} 00074 00075 Gtk::Menu* menu() const { return _menu; } 00076 void set_menu(Gtk::Menu* m) { delete _menu; _menu = m; } 00077 00078 double width() const { return _width; } 00079 double height() const { return _height; } 00080 00081 virtual void resize() = 0; 00082 00083 virtual void load_location() {} 00084 virtual void store_location() {} 00085 00086 bool is_within(const Gnome::Canvas::Rect& rect) const; 00087 inline bool point_is_within(double x, double y) const; 00088 00089 const std::string& name() const { return _name; } 00090 virtual void set_name(const std::string& n) { _name = n; } 00091 00092 uint32_t base_color() const { return _color; } 00093 virtual void set_border_color(uint32_t c) { _border_color = c; } 00094 virtual void set_base_color(uint32_t c) { _color = c; } 00095 virtual void set_default_base_color() = 0; 00096 00097 sigc::signal<void> signal_pointer_entered; 00098 sigc::signal<void> signal_pointer_exited; 00099 sigc::signal<void> signal_selected; 00100 sigc::signal<void> signal_unselected; 00101 00102 sigc::signal<void, GdkEventButton*> signal_clicked; 00103 sigc::signal<void, GdkEventButton*> signal_double_clicked; 00104 00105 sigc::signal<void, double, double> signal_dragged; 00106 sigc::signal<void, double, double> signal_dropped; 00107 00108 protected: 00109 00110 virtual void on_drag(double dx, double dy); 00111 virtual void on_click(GdkEventButton*); 00112 virtual void on_double_click(GdkEventButton*); 00113 00114 virtual void set_height(double h) = 0; 00115 virtual void set_width(double w) = 0; 00116 00117 const boost::weak_ptr<Canvas> _canvas; 00118 00119 bool on_event(GdkEvent* event); 00120 00121 std::string _name; 00122 double _minimum_width; 00123 double _width; 00124 double _height; 00125 uint32_t _border_color; 00126 uint32_t _color; 00127 bool _selected; 00128 Gtk::Menu* _menu; 00129 }; 00130 00131 00132 typedef std::list<boost::shared_ptr<Item> > ItemList; 00133 00134 00137 inline bool 00138 Item::point_is_within(double x, double y) const 00139 { 00140 return (x > property_x() && x < property_x() + _width 00141 && y > property_y() && y < property_y() + _height); 00142 } 00143 00144 00145 inline bool 00146 Item::is_within(const Gnome::Canvas::Rect& rect) const 00147 { 00148 const double x1 = rect.property_x1(); 00149 const double y1 = rect.property_y1(); 00150 const double x2 = rect.property_x2(); 00151 const double y2 = rect.property_y2(); 00152 00153 if (x1 < x2 && y1 < y2) { 00154 return (property_x() > x1 00155 && property_y() > y1 00156 && property_x() + width() < x2 00157 && property_y() + height() < y2); 00158 } else if (x2 < x1 && y2 < y1) { 00159 return (property_x() > x2 00160 && property_y() > y2 00161 && property_x() + width() < x1 00162 && property_y() + height() < y1); 00163 } else if (x1 < x2 && y2 < y1) { 00164 return (property_x() > x1 00165 && property_y() > y2 00166 && property_x() + width() < x2 00167 && property_y() + height() < y1); 00168 } else if (x2 < x1 && y1 < y2) { 00169 return (property_x() > x2 00170 && property_y() > y1 00171 && property_x() + width() < x1 00172 && property_y() + height() < y2); 00173 } else { 00174 return false; 00175 } 00176 } 00177 00178 } // namespace FlowCanvas 00179 00180 #endif // FLOWCANVAS_ITEM_HPP 00181