gui/canvas.cpp

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2008, 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
   7  *
   8  **************************************************************************
   9  * This file contains implements the canvas functionality through flowcanvas
  10  **************************************************************************
  11  *
  12  * LADI Session Handler is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * LADI Session Handler is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  24  * or write to the Free Software Foundation, Inc.,
  25  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include <flowcanvas/Canvas.hpp>
  29 #include <flowcanvas/Port.hpp>
  30 #include <flowcanvas/Module.hpp>
  31
  32 #include "canvas.h"
  33
  34 class canvas_cls: public FlowCanvas::Canvas
  35 {
  36 public:
  37   canvas_cls(
  38     double width,
  39     double height,
  40     void (* connect_request)(void * port1_context, void * port2_context),
  41     void (* disconnect_request)(void * port1_context, void * port2_context),
  42     void (* module_location_changed)(void * module_context, double x, double y))
  43     : FlowCanvas::Canvas(width, height)
  44     , m_connect_request(connect_request)
  45     , m_disconnect_request(disconnect_request)
  46     , m_module_location_changed(module_location_changed)
  47   {}
  48
  49   virtual ~canvas_cls() {}
  50
  51   virtual void on_realize()
  52   {
  53     log_info("canvas_cls::on_realize");
  54     FlowCanvas::Canvas::on_realize();
  55     scroll_to_center();
  56   }
  57
  58   virtual void on_size_allocate(Gtk::Allocation& allocation)
  59   {
  60     //log_info("canvas_cls::on_size_allocate");
  61     FlowCanvas::Canvas::on_size_allocate(allocation);
  62     if (is_realized())
  63     {
  64       //log_info("... realized");
  65       scroll_to_center();
  66     }
  67   }
  68
  69   virtual void connect(boost::shared_ptr<FlowCanvas::Connectable> port1, boost::shared_ptr<FlowCanvas::Connectable> port2);
  70   virtual void disconnect(boost::shared_ptr<FlowCanvas::Connectable> port1, boost::shared_ptr<FlowCanvas::Connectable> port2);
  71
  72   void (* m_connect_request)(void * port1_context, void * port2_context);
  73   void (* m_disconnect_request)(void * port1_context, void * port2_context);
  74   void (* m_module_location_changed)(void * module_context, double x, double y);
  75 };
  76
  77 class module_cls: public FlowCanvas::Module
  78 {
  79 public:
  80   module_cls(
  81     boost::shared_ptr<FlowCanvas::Canvas> canvas,
  82     const std::string& name,
  83     double x,
  84     double y,
  85     bool show_title,
  86     bool show_port_labels,
  87     void * module_context)
  88     : FlowCanvas::Module(canvas, name, x, y, show_title, show_port_labels)
  89     , m_context(module_context)
  90   {}
  91
  92   virtual ~module_cls() {}
  93
  94   virtual void store_location()
  95   {
  96     boost::dynamic_pointer_cast<canvas_cls>(canvas().lock())->m_module_location_changed(m_context, property_x(), property_y());
  97   }
  98
  99   void * m_context;
 100 };
 101
 102 class port_cls: public FlowCanvas::Port
 103 {
 104 public:
 105   port_cls(
 106     boost::shared_ptr<FlowCanvas::Module> module,
 107     const std::string& name,
 108     bool is_input,
 109     uint32_t color,
 110     void * port_context)
 111     : FlowCanvas::Port(module, name, is_input, color)
 112     , context(port_context)
 113   {}
 114
 115   virtual ~port_cls() {}
 116
 117   void * context;
 118 };
 119
 120 bool
 121 canvas_init(
 122   void)
 123 {
 124   Gnome::Canvas::init();
 125   return true;
 126 }
 127
 128 bool
 129 canvas_create(
 130   double width,
 131   double height,
 132   void (* connect_request)(void * port1_context, void * port2_context),
 133   void (* disconnect_request)(void * port1_context, void * port2_context),
 134   void (* module_location_changed)(void * module_context, double x, double y),
 135   canvas_handle * canvas_handle_ptr)
 136 {
 137   boost::shared_ptr<canvas_cls> * canvas;
 138
 139   canvas = new boost::shared_ptr<canvas_cls>(new canvas_cls(width, height, connect_request, disconnect_request, module_location_changed));
 140
 141   *canvas_handle_ptr = (canvas_handle)canvas;
 142
 143   return true;
 144 }
 145
 146 #define canvas_ptr ((boost::shared_ptr<canvas_cls> *)canvas)
 147
 148 GtkWidget *
 149 canvas_get_widget(
 150   canvas_handle canvas)
 151 {
 152   return ((Gtk::Widget *)canvas_ptr->get())->gobj();
 153 }
 154
 155 void
 156 canvas_destroy(
 157   canvas_handle canvas)
 158 {
 159   delete canvas_ptr;
 160 }
 161
 162 void
 163 canvas_clear(
 164   canvas_handle canvas)
 165 {
 166   FlowCanvas::ItemList modules = canvas_ptr->get()->items(); // copy
 167   for (FlowCanvas::ItemList::iterator m = modules.begin(); m != modules.end(); ++m)
 168   {
 169     boost::shared_ptr<FlowCanvas::Module> module = boost::dynamic_pointer_cast<FlowCanvas::Module>(*m);
 170     if (!module)
 171       continue;
 172
 173     FlowCanvas::PortVector ports = module->ports(); // copy
 174     for (FlowCanvas::PortVector::iterator p = ports.begin(); p != ports.end(); ++p)
 175     {
 176       boost::shared_ptr<FlowCanvas::Port> port = boost::dynamic_pointer_cast<FlowCanvas::Port>(*p);
 177       ASSERT(port != NULL);
 178       module->remove_port(port);
 179       port->hide();
 180     }
 181
 182     ASSERT(module->ports().empty());
 183     canvas_ptr->get()->remove_item(module);
 184   }
 185 }
 186
 187 void
 188 canvas_get_size(
 189   canvas_handle canvas,
 190   double * width_ptr,
 191   double * height_ptr)
 192 {
 193   *width_ptr = canvas_ptr->get()->width();
 194   *height_ptr = canvas_ptr->get()->height();
 195 }
 196
 197 void
 198 canvas_scroll_to_center(
 199   canvas_handle canvas)
 200 {
 201   if (canvas_ptr->get()->is_realized())
 202   {
 203     //log_info("realized");
 204     canvas_ptr->get()->scroll_to_center();
 205   }
 206   else
 207   {
 208     //log_info("NOT realized");
 209   }
 210 }
 211
 212 void
 213 canvas_set_zoom(
 214   canvas_handle canvas,
 215   double pix_per_unit)
 216 {
 217   canvas_ptr->get()->set_zoom(pix_per_unit);
 218 }
 219
 220 void
 221 canvas_arrange(
 222   canvas_handle canvas)
 223 {
 224   Glib::RefPtr<Gdk::Window> win = canvas_ptr->get()->get_window();
 225   if (win)
 226   {
 227     canvas_ptr->get()->arrange();
 228   }
 229 }
 230
 231 bool
 232 canvas_create_module(
 233   canvas_handle canvas,
 234   const char * name,
 235   double x,
 236   double y,
 237   bool show_title,
 238   bool show_port_labels,
 239   void * module_context,
 240   canvas_module_handle * module_handle_ptr)
 241 {
 242   boost::shared_ptr<FlowCanvas::Module> * module;
 243
 244   module = new boost::shared_ptr<FlowCanvas::Module>(new module_cls(*canvas_ptr, name, x, y, show_title, show_port_labels, module_context));
 245   canvas_ptr->get()->add_item(*module);
 246   module->get()->resize();
 247
 248   *module_handle_ptr = (canvas_module_handle)module;
 249
 250   return true;
 251 }
 252
 253 #define module_ptr ((boost::shared_ptr<FlowCanvas::Module> *)module)
 254
 255 bool
 256 canvas_destroy_module(
 257   canvas_handle canvas,
 258   canvas_module_handle module)
 259 {
 260   canvas_ptr->get()->remove_item(*module_ptr);
 261   delete module_ptr;
 262   return true;
 263 }
 264
 265 bool
 266 canvas_create_port(
 267   canvas_handle canvas,
 268   canvas_module_handle module,
 269   const char * name,
 270   bool is_input,
 271   int color,
 272   void * port_context,
 273   canvas_port_handle * port_handle_ptr)
 274 {
 275   boost::shared_ptr<port_cls> * port;
 276
 277   port = new boost::shared_ptr<port_cls>(new port_cls(*module_ptr, name, is_input, color, port_context));
 278
 279   module_ptr->get()->add_port(*port);
 280   module_ptr->get()->resize();
 281
 282   *port_handle_ptr = (canvas_port_handle)port;
 283
 284   return true;
 285 }
 286
 287 #undef module_ptr
 288 #define port_ptr ((boost::shared_ptr<port_cls> *)port)
 289
 290 bool
 291 canvas_destroy_port(
 292   canvas_handle canvas,
 293   canvas_port_handle port)
 294 {
 295   boost::shared_ptr<FlowCanvas::Module> module = port_ptr->get()->module().lock();
 296   module->remove_port(*port_ptr);
 297   delete port_ptr;
 298   module->resize();
 299   return true;
 300 }
 301
 302 int
 303 canvas_get_port_color(
 304   canvas_port_handle port)
 305 {
 306   return port_ptr->get()->color();
 307 }
 308
 309 #undef port_ptr
 310 #define port1_ptr ((boost::shared_ptr<port_cls> *)port1)
 311 #define port2_ptr ((boost::shared_ptr<port_cls> *)port2)
 312
 313 bool
 314 canvas_add_connection(
 315   canvas_handle canvas,
 316   canvas_port_handle port1,
 317   canvas_port_handle port2,
 318   uint32_t color)
 319 {
 320   canvas_ptr->get()->add_connection(*port1_ptr, *port2_ptr, color);
 321   return true;
 322 }
 323
 324 bool
 325 canvas_remove_connection(
 326   canvas_handle canvas,
 327   canvas_port_handle port1,
 328   canvas_port_handle port2)
 329 {
 330   canvas_ptr->get()->remove_connection(*port1_ptr, *port2_ptr);
 331   return true;
 332 }
 333
 334 #undef port1_ptr
 335 #undef port2_ptr
 336
 337 void
 338 canvas_cls::connect(
 339   boost::shared_ptr<FlowCanvas::Connectable> c1,
 340   boost::shared_ptr<FlowCanvas::Connectable> c2)
 341 {
 342   if (m_connect_request != NULL)
 343   {
 344     boost::shared_ptr<port_cls> port1 = boost::dynamic_pointer_cast<port_cls>(c1);
 345     boost::shared_ptr<port_cls> port2 = boost::dynamic_pointer_cast<port_cls>(c2);
 346     m_connect_request(port1->context, port2->context);
 347   }
 348 }
 349
 350 void
 351 canvas_cls::disconnect(
 352   boost::shared_ptr<FlowCanvas::Connectable> c1,
 353   boost::shared_ptr<FlowCanvas::Connectable> c2)
 354 {
 355   if (m_disconnect_request != NULL)
 356   {
 357     boost::shared_ptr<port_cls> port1 = boost::dynamic_pointer_cast<port_cls>(c1);
 358     boost::shared_ptr<port_cls> port2 = boost::dynamic_pointer_cast<port_cls>(c2);
 359     m_disconnect_request(port1->context, port2->context);
 360   }
 361 }
 362
 363 bool
 364 canvas_enum_modules(
 365   canvas_handle canvas,
 366   void * callback_context,
 367   bool (* callback)(void * context, canvas_module_handle module))
 368 {
 369   return false;
 370 }
 371
 372 bool
 373 canvas_enum_module_ports(
 374   canvas_handle canvas,
 375   canvas_module_handle module,
 376   void * callback_context,
 377   bool (* callback)(void * context, canvas_port_handle port))
 378 {
 379   return false;
 380 }