FileInterface.hh 13.2 KB
 Jan Möbius committed Aug 05, 2009 1 /*===========================================================================*\  Jan Möbius committed Nov 25, 2010 2 3 * * * OpenFlipper *  Jan Möbius committed Jan 26, 2011 4 * Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen *  Jan Möbius committed Nov 25, 2010 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 * www.openflipper.org * * * *--------------------------------------------------------------------------- * * This file is part of OpenFlipper. * * * * OpenFlipper is free software: you can redistribute it and/or modify * * it under the terms of the GNU Lesser General Public License as * * published by the Free Software Foundation, either version 3 of * * the License, or (at your option) any later version with the * * following exceptions: * * * * If other files instantiate templates or use macros * * or inline functions from this file, or you compile this file and * * link it with other files to produce an executable, this file does * * not by itself cause the resulting executable to be covered by the * * GNU Lesser General Public License. This exception does not however * * invalidate any other reasons why the executable file might be * * covered by the GNU Lesser General Public License. * * * * OpenFlipper 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 Lesser General Public License for more details. * * * * You should have received a copy of the GNU LesserGeneral Public * * License along with OpenFlipper. If not, * * see . * * *  Jan Möbius committed Aug 05, 2009 33 34 35 \*===========================================================================*/ /*===========================================================================*\  Jan Möbius committed Nov 25, 2010 36 37 38 39 40 * * * $Revision$ * * $LastChangedBy$ * * $Date$ * * *  Jan Möbius committed Aug 05, 2009 41 \*===========================================================================*/  Jan Möbius committed Aug 29, 2008 42 43   Jan Möbius committed Sep 16, 2008 44 45 #ifndef FILEINTERFACE_HH #define FILEINTERFACE_HH  Jan Möbius committed Aug 29, 2008 46 47 48  #include #include  Jan Möbius committed Sep 16, 2008 49   Jan Möbius committed Mar 16, 2011 50 51 52 53 54 55 56 57 58 /** \file FileInterface.hh * * Interface class for file handling.\ref fileInterfacePage */ /** \brief Interface class for file handling. * * \ref fileInterfacePage "Detailed description" * \n  Jan Möbius committed Sep 16, 2008 59  *  Jan Möbius committed Mar 16, 2011 60 61  * Loading and saving of files in OpenFlipper is handled via the file plugins. * These have to implement this class.  Jan Möbius committed Aug 29, 2008 62 63  */ class FileInterface {  Jan Möbius committed Sep 16, 2008 64   Jan Möbius committed Feb 03, 2009 65 66 67 68 //=========================================================================== /** @name Widgets * @{ */ //===========================================================================  Jan Möbius committed Feb 25, 2011 69   Mike Kremer committed Feb 10, 2009 70 71 72 73  public: /// Destructor virtual ~FileInterface() {};  Dirk Wilden committed Sep 15, 2008 74   Jan Möbius committed Feb 03, 2009 75 76 77 78 79  /** You can provide a special widget showing options for saving your file types * depending on the current filter * * _currentFilter: one filter from saveFilters *  Jan Möbius committed Mar 16, 2011 80  * Return 0 when you don't need one  Jan Möbius committed Feb 03, 2009 81  */  Jan Möbius committed Mar 16, 2011 82  virtual QWidget* saveOptionsWidget(QString _currentFilter) = 0;  Dirk Wilden committed Sep 15, 2008 83   Jan Möbius committed Feb 03, 2009 84 85 86 87 88  /** You can provide a special widget showing options for loading your file types * depending on the current filter * * _currentFilter: one filter from loadFilters *  Jan Möbius committed Mar 16, 2011 89  * Return 0 when you don't need one  Jan Möbius committed Feb 03, 2009 90  */  Jan Möbius committed Mar 16, 2011 91  virtual QWidget* loadOptionsWidget(QString _currentFilter) = 0;  Jan Möbius committed Feb 03, 2009 92 93  /** @} */  Jan Möbius committed Sep 16, 2008 94   Jan Möbius committed Feb 03, 2009 95 96 97 98 99 100 101 //=========================================================================== /** @name Supported types * @{ */ //=========================================================================== public:  Jan Möbius committed Nov 30, 2009 102  /** \brief Return your supported object type( e.g. DATA_TRIANGLE_MESH )  Jan Möbius committed Feb 03, 2009 103  *  Jan Möbius committed Mar 16, 2011 104 105 106  * If you support multiple DataTypes you can combine them bitwise here. * The function is used from the load and save code to check if your plugin * can handle an object of a given dataType.  Jan Möbius committed Feb 03, 2009 107 108 109 110  */ virtual DataType supportedType() = 0;  Jan Möbius committed Mar 16, 2011 111  /** Return the Qt Filters for File dialogs when loading files (e.g. "Off files ( *.off )" )  Jan Möbius committed Feb 03, 2009 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127  * */ virtual QString getLoadFilters() = 0; /** Get the Qt Filters for Filedialogs when saving files (e.g. "Off files ( *.off )" ) * */ virtual QString getSaveFilters() = 0; /** @} */ //=========================================================================== /** @name Load Save Implementation * @{ */ //===========================================================================  Jan Möbius committed Feb 25, 2011 128 129 signals:  Jan Möbius committed Feb 25, 2011 130 131 132  /** \brief This signal has to be emitted if an object has been loaded from a file. * * Every time a new object is added to the scene from a file, this signal has to be emitted.  Mike Kremer committed Oct 05, 2011 133  * Emit this signal once each time a file has been completely processed.  Jan Möbius committed Feb 25, 2011 134 135 136  * * @param _id Id of the new object */  Jan Möbius committed Mar 16, 2011 137  virtual void openedFile( int _id ) {};  Jan Möbius committed Feb 25, 2011 138   Jan Möbius committed Sep 16, 2008 139 140 public slots:  Jan Möbius committed Feb 03, 2009 141 142 143 144  /** \brief Load an object from the given file * * The Core will call this slot if you should load a file. The core will * check if you support the given file type depending on the provided  Jan Möbius committed Nov 27, 2009 145 146  * filters and dataTypes ( see supportedType and getLoadFilters )\n *  Jan Möbius committed Jun 06, 2012 147 148 149 150  * If loading fails, you have to return -1. If you created an empty * object and then your load procedure fails, you should remove the newly * generated object.\n *  Jan Möbius committed Nov 27, 2009 151  * if you just opened a file and did not create any object, return 0 here,  Jan Möbius committed Feb 25, 2011 152  * telling the core that it was successfully loaded but no new object  Jan Möbius committed Nov 27, 2009 153  * has been created!  Jan Möbius committed Feb 03, 2009 154  */  Jan Möbius committed Mar 16, 2011 155  virtual int loadObject(QString _filename) = 0;  Jan Möbius committed Sep 16, 2008 156   Dirk Wilden committed Jan 12, 2010 157 158 159 160 161 162 163  /** \brief Load an object from the given file * * The Core will call this slot if you should load a file. The core will * check if you support the given file type depending on the provided * filters and dataTypes ( see supportedType and getLoadFilters )\n * * if you just opened a file and did not create any object, return 0 here,  Jan Möbius committed Feb 25, 2011 164  * telling the core that it was successfully loaded but no new object  Dirk Wilden committed Jan 12, 2010 165 166  * has been created! *  Jan Möbius committed Jun 06, 2012 167 168 169 170  * If loading fails, you have to return -1. If you created an empty * object and then your load procedure fails, you should remove the newly * generated object.\n *  Dirk Wilden committed Jan 12, 2010 171  * If the Plugin is able to open the file in different DataTypes  Jan Möbius committed Sep 05, 2011 172 173 174 175  * one of these DataTypes can be forced with this function. * * This forcing is used for example by the recent files function for * choosing between poly or triangle mesh loading.  Dirk Wilden committed Jan 12, 2010 176 177  * */  Jan Möbius committed Mar 16, 2011 178  virtual int loadObject(QString _filename, DataType _type){ return -1;};  Jan Möbius committed Feb 25, 2011 179   Jan Möbius committed Feb 03, 2009 180 181 182 183 184 185 186  /** \brief Save an object from the given file * * The Core will call this slot if you should save an object to a file. * The core will check if you support the given object depending on the * provided dataTypes ( see supportedType ). * Additionally to the filename you get the id of the object to save */  Jan Möbius committed Mar 16, 2011 187  virtual bool saveObject(int _id, QString _filename) = 0;  Jan Möbius committed Sep 16, 2008 188   Dirk Wilden committed Apr 13, 2010 189 190 191 192 193 194 195  /** \brief Save multiple objects to one file * * The Core will call this slot if the user wants to save multiple files in one file. * The core will check if you support the given object depending on the * provided dataTypes ( see supportedType ). * Additionally to the filename you get ids of the objects to save */  Jan Möbius committed Mar 16, 2011 196  virtual bool saveObjects(IdList _ids, QString _filename){return false;};  Jan Möbius committed Feb 03, 2009 197 /** @} */  Jan Möbius committed Sep 16, 2008 198   Jan Möbius committed Aug 29, 2008 199 200 };  Jan Möbius committed Mar 16, 2011 201 202 203 204 205 206 207 208 209 /** \page fileInterfacePage File Interface * \n \image html FileInterface.png \n \section fileInterface_Functionality Functionality This interface class has to be fully implemented. When you want to support save and load for an object type you have to implement all functions in this class in a file plugin.  Jan Möbius committed Feb 14, 2012 210 The plugin has to be named Plugin-File\. The plugins are loaded directly after the  Jan Möbius committed Mar 16, 2011 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 Type Plugins. OpenFlipper manages loading and saving of files from the core. \section fileInterface_filters Load/Save filters and Type Support In these functions you have to return filters for your supported type. Use the standard format of Qt and return your filters within the functions FileInterface::getLoadFilters() and FileInterface::getSaveFilters(). OpenFlipper will decide based on the filters, if your plugin is used to handle a load or save request. Additionally you have to define, which DataTypes your plugin supports via FileInterface::supportedType(). \code // File types you support when loading files QString ExamplePlugin::getLoadFilters() { return QString( tr("Your FileType ( *.ext )") ); } // File types you support when saving files QString ExamplePlugin::getSaveFilters() { return QString( tr("Your FileType ( *.ext )") ); } // Data types you support in your plugin DataType ExamplePlugin::supportedType() { DataType type = DATA_POLY_MESH | DATA_TRIANGLE_MESH | DATA_GROUP; return type; } \endcode \section fileInterface_widgets Widgets When an object is loaded or saved via your file plugin, you can present an additional dialog, used to control your reader/writer. You have to implement the following functions. If you don't need such a widget, just return a 0. \code // In your plugin initialization void ExamplePlugin::pluginsInitialized() { // Global variable: // QWidget* saveOptionsWidget_; // Create widget saveOptionsWidget_ = new QWidget(0); // Setup widget afterwards // Global variable: // QWidget* loadOptionsWidget_; // Create widget loadOptionsWidget_ = new QWidget(0); // Setup widget afterwards } // Return your widget for save options QWidget* ExamplePlugin::saveOptionsWidget(QString _currentFilter) { // Modify widget based on the filter // ... // Return widget return saveOptionsWidget_; } // Return your widget for load options QWidget* ExamplePlugin::loadOptionsWidget(QString _currentFilter) { // Modify widget based on the filter // ... // Return widget return loadOptionsWidget_; } \endcode \section fileInterface_loading Loading Files The FileInterface defines two functions for loading files. The first one ( FileInterface::loadObject(QString _filename) ) has to be implemented. It has to load the data from the given file. The return value of this function has to be the id of the new object. Additionally you have to \code emit FileInterface::openedFile( int _id ); \endcode with the id of every object you loaded from the file. If the file contains multiple objects, create a GroupObject and add all loaded objects to that group. Than return the id of the group here. Don't forget the FileInterface::openedFile() signal for every newly loaded object from the file. One function that can be implemented is FileInterface::loadObject(QString _filename, DataType _type). This function gets a DataType along with the filename. This can be used to force a specific DataType when loading objects. E.g. A plugin loading obj files which handles triangle and polygonal meshes which can than be forced to triangulate every input data. \section fileInterface_saving Saving Files The FileInterface defines two functions for loading files. The first one ( FileInterface::saveObject(int _id, QString _filename) ) has to be implemented. It has to save the object with the given id to the file specified by the filename. The return value of this function has to be true if it succeeded, otherwise false. OpenFlipper will choose your plugin to save the data if two prerequisites are fulfilled. Your FileInterface::supportedTypes() has to support the DataType of the object and your save filters have to contain the extension of the file to use. These checks are done within OpenFlipper such that you only get information that can be handled by the plugin. Additionally there is a function FileInterface::saveObjects(IdList _ids, QString _filename) which does the same as the above but saves a set of objects to a file. \section fileInterface_usage Usage To use the FileInterface:
TODO: // Deprecated here? In TypeInterface? virtual int addEmpty() { return -1; }; */ Q_DECLARE_INTERFACE(FileInterface,"OpenFlipper.FileInterface/1.0")  Jan Möbius committed Sep 16, 2008 340   Jan Möbius committed Aug 29, 2008 341 #endif // FILEINTERFACE_HH