1 // Copyright (C) 2002-2012 Nikolaus Gebhardt 2 // This file is part of the "Irrlicht Engine". 3 // For conditions of distribution and use, see copyright notice in irrlicht.h 4 5 #ifndef __I_GUI_ENVIRONMENT_H_INCLUDED__ 6 #define __I_GUI_ENVIRONMENT_H_INCLUDED__ 7 8 #include "IReferenceCounted.h" 9 #include "IGUISkin.h" 10 #include "rect.h" 11 #include "EMessageBoxFlags.h" 12 #include "IEventReceiver.h" 13 #include "IXMLReader.h" 14 #include "path.h" 15 16 namespace irr 17 { 18 class IOSOperator; 19 class IEventReceiver; 20 21 namespace io 22 { 23 class IXMLWriter; 24 class IReadFile; 25 class IWriteFile; 26 class IFileSystem; 27 } // end namespace io 28 namespace video 29 { 30 class IVideoDriver; 31 class ITexture; 32 } // end namespace video 33 34 namespace gui 35 { 36 37 class IGUIElement; 38 class IGUIFont; 39 class IGUISpriteBank; 40 class IGUIScrollBar; 41 class IGUIImage; 42 class IGUIMeshViewer; 43 class IGUICheckBox; 44 class IGUIListBox; 45 class IGUITreeView; 46 class IGUIImageList; 47 class IGUIFileOpenDialog; 48 class IGUIColorSelectDialog; 49 class IGUIInOutFader; 50 class IGUIStaticText; 51 class IGUIEditBox; 52 class IGUISpinBox; 53 class IGUITabControl; 54 class IGUITab; 55 class IGUITable; 56 class IGUIContextMenu; 57 class IGUIComboBox; 58 class IGUIToolBar; 59 class IGUIButton; 60 class IGUIWindow; 61 class IGUIElementFactory; 62 63 //! GUI Environment. Used as factory and manager of all other GUI elements. 64 /** \par This element can create the following events of type EGUI_EVENT_TYPE (which are passed on to focused sub-elements): 65 \li EGET_ELEMENT_FOCUS_LOST 66 \li EGET_ELEMENT_FOCUSED 67 \li EGET_ELEMENT_LEFT 68 \li EGET_ELEMENT_HOVERED 69 */ 70 class IGUIEnvironment : public virtual IReferenceCounted 71 { 72 public: 73 74 //! Draws all gui elements by traversing the GUI environment starting at the root node. 75 virtual void drawAll() = 0; 76 77 //! Sets the focus to an element. 78 /** Causes a EGET_ELEMENT_FOCUS_LOST event followed by a 79 EGET_ELEMENT_FOCUSED event. If someone absorbed either of the events, 80 then the focus will not be changed. 81 \param element Pointer to the element which shall get the focus. 82 \return True on success, false on failure */ 83 virtual bool setFocus(IGUIElement* element) = 0; 84 85 //! Returns the element which holds the focus. 86 /** \return Pointer to the element with focus. */ 87 virtual IGUIElement* getFocus() const = 0; 88 89 //! Returns the element which was last under the mouse cursor 90 /** NOTE: This information is updated _after_ the user-eventreceiver 91 received it's mouse-events. To find the hovered element while catching 92 mouse events you have to use instead: 93 IGUIEnvironment::getRootGUIElement()->getElementFromPoint(mousePos); 94 \return Pointer to the element under the mouse. */ 95 virtual IGUIElement* getHovered() const = 0; 96 97 //! Removes the focus from an element. 98 /** Causes a EGET_ELEMENT_FOCUS_LOST event. If the event is absorbed 99 then the focus will not be changed. 100 \param element Pointer to the element which shall lose the focus. 101 \return True on success, false on failure */ 102 virtual bool removeFocus(IGUIElement* element) = 0; 103 104 //! Returns whether the element has focus 105 /** \param element Pointer to the element which is tested. 106 \return True if the element has focus, else false. */ 107 virtual bool hasFocus(IGUIElement* element) const = 0; 108 109 //! Returns the current video driver. 110 /** \return Pointer to the video driver. */ 111 virtual video::IVideoDriver* getVideoDriver() const = 0; 112 113 //! Returns the file system. 114 /** \return Pointer to the file system. */ 115 virtual io::IFileSystem* getFileSystem() const = 0; 116 117 //! returns a pointer to the OS operator 118 /** \return Pointer to the OS operator. */ 119 virtual IOSOperator* getOSOperator() const = 0; 120 121 //! Removes all elements from the environment. 122 virtual void clear() = 0; 123 124 //! Posts an input event to the environment. 125 /** Usually you do not have to 126 use this method, it is used by the engine internally. 127 \param event The event to post. 128 \return True if succeeded, else false. */ 129 virtual bool postEventFromUser(const SEvent& event) = 0; 130 131 //! This sets a new event receiver for gui events. 132 /** Usually you do not have to 133 use this method, it is used by the engine internally. 134 \param evr Pointer to the new receiver. */ 135 virtual void setUserEventReceiver(IEventReceiver* evr) = 0; 136 137 //! Returns pointer to the current gui skin. 138 /** \return Pointer to the GUI skin. */ 139 virtual IGUISkin* getSkin() const = 0; 140 141 //! Sets a new GUI Skin 142 /** You can use this to change the appearance of the whole GUI 143 Environment. You can set one of the built-in skins or implement your 144 own class derived from IGUISkin and enable it using this method. 145 To set for example the built-in Windows classic skin, use the following 146 code: 147 \code 148 gui::IGUISkin* newskin = environment->createSkin(gui::EGST_WINDOWS_CLASSIC); 149 environment->setSkin(newskin); 150 newskin->drop(); 151 \endcode 152 \param skin New skin to use. 153 */ 154 virtual void setSkin(IGUISkin* skin) = 0; 155 156 //! Creates a new GUI Skin based on a template. 157 /** Use setSkin() to set the created skin. 158 \param type The type of the new skin. 159 \return Pointer to the created skin. 160 If you no longer need it, you should call IGUISkin::drop(). 161 See IReferenceCounted::drop() for more information. */ 162 virtual IGUISkin* createSkin(EGUI_SKIN_TYPE type) = 0; 163 164 165 //! Creates the image list from the given texture. 166 /** \param texture Texture to split into images 167 \param imageSize Dimension of each image 168 \param useAlphaChannel Flag whether alpha channel of the texture should be honored. 169 \return Pointer to the font. Returns 0 if the font could not be loaded. 170 This pointer should not be dropped. See IReferenceCounted::drop() for 171 more information. */ 172 virtual IGUIImageList* createImageList( video::ITexture* texture, 173 core::dimension2d<s32> imageSize, 174 bool useAlphaChannel ) = 0; 175 176 //! Returns pointer to the font with the specified filename. 177 /** Loads the font if it was not loaded before. 178 \param filename Filename of the Font. 179 \return Pointer to the font. Returns 0 if the font could not be loaded. 180 This pointer should not be dropped. See IReferenceCounted::drop() for 181 more information. */ 182 virtual IGUIFont* getFont(const io::path& filename) = 0; 183 184 //! Adds an externally loaded font to the font list. 185 /** This method allows to attach an already loaded font to the list of 186 existing fonts. The font is grabbed if non-null and adding was successful. 187 \param name Name the font should be stored as. 188 \param font Pointer to font to add. 189 \return Pointer to the font stored. This can differ from given parameter if the name previously existed. */ 190 virtual IGUIFont* addFont(const io::path& name, IGUIFont* font) = 0; 191 192 //! remove loaded font 193 virtual void removeFont(IGUIFont* font) = 0; 194 195 //! Returns the default built-in font. 196 /** \return Pointer to the default built-in font. 197 This pointer should not be dropped. See IReferenceCounted::drop() for 198 more information. */ 199 virtual IGUIFont* getBuiltInFont() const = 0; 200 201 //! Returns pointer to the sprite bank with the specified file name. 202 /** Loads the bank if it was not loaded before. 203 \param filename Filename of the sprite bank's origin. 204 \return Pointer to the sprite bank. Returns 0 if it could not be loaded. 205 This pointer should not be dropped. See IReferenceCounted::drop() for more information. */ 206 virtual IGUISpriteBank* getSpriteBank(const io::path& filename) = 0; 207 208 //! Adds an empty sprite bank to the manager 209 /** \param name Name of the new sprite bank. 210 \return Pointer to the sprite bank. 211 This pointer should not be dropped. See IReferenceCounted::drop() for more information. */ 212 virtual IGUISpriteBank* addEmptySpriteBank(const io::path& name) = 0; 213 214 //! Returns the root gui element. 215 /** This is the first gui element, the (direct or indirect) parent of all 216 other gui elements. It is a valid IGUIElement, with dimensions the same 217 size as the screen. 218 \return Pointer to the root element of the GUI. The returned pointer 219 should not be dropped. See IReferenceCounted::drop() for more 220 information. */ 221 virtual IGUIElement* getRootGUIElement() = 0; 222 223 //! Adds a button element. 224 /** \param rectangle Rectangle specifying the borders of the button. 225 \param parent Parent gui element of the button. 226 \param id Id with which the gui element can be identified. 227 \param text Text displayed on the button. 228 \param tooltiptext Text displayed in the tooltip. 229 \return Pointer to the created button. Returns 0 if an error occurred. 230 This pointer should not be dropped. See IReferenceCounted::drop() for 231 more information. */ 232 virtual IGUIButton* addButton(const core::rect<s32>& rectangle, 233 IGUIElement* parent=0, s32 id=-1, const wchar_t* text=0, const wchar_t* tooltiptext = 0) = 0; 234 235 //! Adds an empty window element. 236 /** \param rectangle Rectangle specifying the borders of the window. 237 \param modal Defines if the dialog is modal. This means, that all other 238 gui elements which were created before the window cannot be used until 239 it is removed. 240 \param text Text displayed as the window title. 241 \param parent Parent gui element of the window. 242 \param id Id with which the gui element can be identified. 243 \return Pointer to the created window. Returns 0 if an error occurred. 244 This pointer should not be dropped. See IReferenceCounted::drop() for 245 more information. */ 246 virtual IGUIWindow* addWindow(const core::rect<s32>& rectangle, bool modal = false, 247 const wchar_t* text=0, IGUIElement* parent=0, s32 id=-1) = 0; 248 249 //! Adds a modal screen. 250 /** This control stops its parent's members from being able to receive 251 input until its last child is removed, it then deletes itself. 252 \param parent Parent gui element of the modal. 253 \return Pointer to the created modal. Returns 0 if an error occurred. 254 This pointer should not be dropped. See IReferenceCounted::drop() for 255 more information. */ 256 virtual IGUIElement* addModalScreen(IGUIElement* parent) = 0; 257 258 //! Adds a message box. 259 /** \param caption Text to be displayed the title of the message box. 260 \param text Text to be displayed in the body of the message box. 261 \param modal Defines if the dialog is modal. This means, that all other 262 gui elements which were created before the message box cannot be used 263 until this messagebox is removed. 264 \param flags Flags specifying the layout of the message box. For example 265 to create a message box with an OK and a CANCEL button on it, set this 266 to (EMBF_OK | EMBF_CANCEL). 267 \param parent Parent gui element of the message box. 268 \param id Id with which the gui element can be identified. 269 \param image Optional texture which will be displayed beside the text as an image 270 \return Pointer to the created message box. Returns 0 if an error 271 occurred. This pointer should not be dropped. See 272 IReferenceCounted::drop() for more information. */ 273 virtual IGUIWindow* addMessageBox(const wchar_t* caption, const wchar_t* text=0, 274 bool modal = true, s32 flags = EMBF_OK, IGUIElement* parent=0, s32 id=-1, video::ITexture* image=0) = 0; 275 276 //! Adds a scrollbar. 277 /** \param horizontal Specifies if the scroll bar is drawn horizontal 278 or vertical. 279 \param rectangle Rectangle specifying the borders of the scrollbar. 280 \param parent Parent gui element of the scroll bar. 281 \param id Id to identify the gui element. 282 \return Pointer to the created scrollbar. Returns 0 if an error 283 occurred. This pointer should not be dropped. See 284 IReferenceCounted::drop() for more information. */ 285 virtual IGUIScrollBar* addScrollBar(bool horizontal, const core::rect<s32>& rectangle, 286 IGUIElement* parent=0, s32 id=-1) = 0; 287 288 //! Adds an image element. 289 /** \param image Image to be displayed. 290 \param pos Position of the image. The width and height of the image is 291 taken from the image. 292 \param useAlphaChannel Sets if the image should use the alpha channel 293 of the texture to draw itself. 294 \param parent Parent gui element of the image. 295 \param id Id to identify the gui element. 296 \param text Title text of the image. 297 \return Pointer to the created image element. Returns 0 if an error 298 occurred. This pointer should not be dropped. See 299 IReferenceCounted::drop() for more information. */ 300 virtual IGUIImage* addImage(video::ITexture* image, core::position2d<s32> pos, 301 bool useAlphaChannel=true, IGUIElement* parent=0, s32 id=-1, const wchar_t* text=0) = 0; 302 303 //! Adds an image element. 304 /** Use IGUIImage::setImage later to set the image to be displayed. 305 \param rectangle Rectangle specifying the borders of the image. 306 \param parent Parent gui element of the image. 307 \param id Id to identify the gui element. 308 \param text Title text of the image. 309 \param useAlphaChannel Sets if the image should use the alpha channel 310 of the texture to draw itself. 311 \return Pointer to the created image element. Returns 0 if an error 312 occurred. This pointer should not be dropped. See 313 IReferenceCounted::drop() for more information. */ 314 virtual IGUIImage* addImage(const core::rect<s32>& rectangle, 315 IGUIElement* parent=0, s32 id=-1, const wchar_t* text=0, bool useAlphaChannel=true) = 0; 316 317 //! Adds a checkbox element. 318 /** \param checked Define the initial state of the check box. 319 \param rectangle Rectangle specifying the borders of the check box. 320 \param parent Parent gui element of the check box. 321 \param id Id to identify the gui element. 322 \param text Title text of the check box. 323 \return Pointer to the created check box. Returns 0 if an error 324 occurred. This pointer should not be dropped. See 325 IReferenceCounted::drop() for more information. */ 326 virtual IGUICheckBox* addCheckBox(bool checked, const core::rect<s32>& rectangle, 327 IGUIElement* parent=0, s32 id=-1, const wchar_t* text=0) = 0; 328 329 //! Adds a list box element. 330 /** \param rectangle Rectangle specifying the borders of the list box. 331 \param parent Parent gui element of the list box. 332 \param id Id to identify the gui element. 333 \param drawBackground Flag whether the background should be drawn. 334 \return Pointer to the created list box. Returns 0 if an error occurred. 335 This pointer should not be dropped. See IReferenceCounted::drop() for 336 more information. */ 337 virtual IGUIListBox* addListBox(const core::rect<s32>& rectangle, 338 IGUIElement* parent=0, s32 id=-1, bool drawBackground=false) = 0; 339 340 //! Adds a tree view element. 341 /** \param rectangle Position and dimension of list box. 342 \param parent Parent gui element of the list box. 343 \param id Id to identify the gui element. 344 \param drawBackground Flag whether the background should be drawn. 345 \param scrollBarVertical Flag whether a vertical scrollbar should be used 346 \param scrollBarHorizontal Flag whether a horizontal scrollbar should be used 347 \return Pointer to the created list box. Returns 0 if an error occurred. 348 This pointer should not be dropped. See IReferenceCounted::drop() for 349 more information. */ 350 virtual IGUITreeView* addTreeView(const core::rect<s32>& rectangle, 351 IGUIElement* parent=0, s32 id=-1, bool drawBackground=false, 352 bool scrollBarVertical = true, bool scrollBarHorizontal = false) = 0; 353 354 //! Adds a mesh viewer. Not 100% implemented yet. 355 /** \param rectangle Rectangle specifying the borders of the mesh viewer. 356 \param parent Parent gui element of the mesh viewer. 357 \param id Id to identify the gui element. 358 \param text Title text of the mesh viewer. 359 \return Pointer to the created mesh viewer. Returns 0 if an error 360 occurred. This pointer should not be dropped. See 361 IReferenceCounted::drop() for more information. */ 362 virtual IGUIMeshViewer* addMeshViewer(const core::rect<s32>& rectangle, 363 IGUIElement* parent=0, s32 id=-1, const wchar_t* text=0) = 0; 364 365 //! Adds a file open dialog. 366 /** \param title Text to be displayed as the title of the dialog. 367 \param modal Defines if the dialog is modal. This means, that all other 368 gui elements which were created before the message box cannot be used 369 until this messagebox is removed. 370 \param parent Parent gui element of the dialog. 371 \param id Id to identify the gui element. 372 \param restoreCWD If set to true, the current workingn directory will be 373 restored after the dialog is closed in some way. Otherwise the working 374 directory will be the one that the file dialog was last showing. 375 \param startDir Optional path for which the file dialog will be opened. 376 \return Pointer to the created file open dialog. Returns 0 if an error 377 occurred. This pointer should not be dropped. See 378 IReferenceCounted::drop() for more information. */ 379 virtual IGUIFileOpenDialog* addFileOpenDialog(const wchar_t* title=0, 380 bool modal=true, IGUIElement* parent=0, s32 id=-1, 381 bool restoreCWD=false, io::path::char_type* startDir=0) = 0; 382 383 //! Adds a color select dialog. 384 /** \param title The title of the dialog. 385 \param modal Defines if the dialog is modal. This means, that all other 386 gui elements which were created before the dialog cannot be used 387 until it is removed. 388 \param parent The parent of the dialog. 389 \param id The ID of the dialog. 390 \return Pointer to the created file open dialog. Returns 0 if an error 391 occurred. This pointer should not be dropped. See 392 IReferenceCounted::drop() for more information. */ 393 virtual IGUIColorSelectDialog* addColorSelectDialog(const wchar_t* title = 0, 394 bool modal=true, IGUIElement* parent=0, s32 id=-1) = 0; 395 396 //! Adds a static text. 397 /** \param text Text to be displayed. Can be altered after creation by SetText(). 398 \param rectangle Rectangle specifying the borders of the static text 399 \param border Set to true if the static text should have a 3d border. 400 \param wordWrap Enable if the text should wrap into multiple lines. 401 \param parent Parent item of the element, e.g. a window. 402 \param id The ID of the element. 403 \param fillBackground Enable if the background shall be filled. 404 Defaults to false. 405 \return Pointer to the created static text. Returns 0 if an error 406 occurred. This pointer should not be dropped. See 407 IReferenceCounted::drop() for more information. */ 408 virtual IGUIStaticText* addStaticText(const wchar_t* text, const core::rect<s32>& rectangle, 409 bool border=false, bool wordWrap=true, IGUIElement* parent=0, s32 id=-1, 410 bool fillBackground = false) = 0; 411 412 //! Adds an edit box. 413 /** Supports unicode input from every keyboard around the world, 414 scrolling, copying and pasting (exchanging data with the clipboard 415 directly), maximum character amount, marking, and all shortcuts like 416 ctrl+X, ctrl+V, ctrl+C, shift+Left, shift+Right, Home, End, and so on. 417 \param text Text to be displayed. Can be altered after creation 418 by setText(). 419 \param rectangle Rectangle specifying the borders of the edit box. 420 \param border Set to true if the edit box should have a 3d border. 421 \param parent Parent item of the element, e.g. a window. 422 Set it to 0 to place the edit box directly in the environment. 423 \param id The ID of the element. 424 \return Pointer to the created edit box. Returns 0 if an error occurred. 425 This pointer should not be dropped. See IReferenceCounted::drop() for 426 more information. */ 427 virtual IGUIEditBox* addEditBox(const wchar_t* text, const core::rect<s32>& rectangle, 428 bool border=true, IGUIElement* parent=0, s32 id=-1) = 0; 429 430 //! Adds a spin box. 431 /** An edit box with up and down buttons 432 \param text Text to be displayed. Can be altered after creation by setText(). 433 \param rectangle Rectangle specifying the borders of the spin box. 434 \param border Set to true if the spin box should have a 3d border. 435 \param parent Parent item of the element, e.g. a window. 436 Set it to 0 to place the spin box directly in the environment. 437 \param id The ID of the element. 438 \return Pointer to the created spin box. Returns 0 if an error occurred. 439 This pointer should not be dropped. See IReferenceCounted::drop() for 440 more information. */ 441 virtual IGUISpinBox* addSpinBox(const wchar_t* text, const core::rect<s32>& rectangle, 442 bool border=true,IGUIElement* parent=0, s32 id=-1) = 0; 443 444 //! Adds an element for fading in or out. 445 /** \param rectangle Rectangle specifying the borders of the fader. 446 If the pointer is NULL, the whole screen is used. 447 \param parent Parent item of the element, e.g. a window. 448 \param id An identifier for the fader. 449 \return Pointer to the created in-out-fader. Returns 0 if an error 450 occurred. This pointer should not be dropped. See 451 IReferenceCounted::drop() for more information. */ 452 virtual IGUIInOutFader* addInOutFader(const core::rect<s32>* rectangle=0, IGUIElement* parent=0, s32 id=-1) = 0; 453 454 //! Adds a tab control to the environment. 455 /** \param rectangle Rectangle specifying the borders of the tab control. 456 \param parent Parent item of the element, e.g. a window. 457 Set it to 0 to place the tab control directly in the environment. 458 \param fillbackground Specifies if the background of the tab control 459 should be drawn. 460 \param border Specifies if a flat 3d border should be drawn. This is 461 usually not necessary unless you place the control directly into 462 the environment without a window as parent. 463 \param id An identifier for the tab control. 464 \return Pointer to the created tab control element. Returns 0 if an 465 error occurred. This pointer should not be dropped. See 466 IReferenceCounted::drop() for more information. */ 467 virtual IGUITabControl* addTabControl(const core::rect<s32>& rectangle, 468 IGUIElement* parent=0, bool fillbackground=false, 469 bool border=true, s32 id=-1) = 0; 470 471 //! Adds tab to the environment. 472 /** You can use this element to group other elements. This is not used 473 for creating tabs on tab controls, please use IGUITabControl::addTab() 474 for this instead. 475 \param rectangle Rectangle specifying the borders of the tab. 476 \param parent Parent item of the element, e.g. a window. 477 Set it to 0 to place the tab directly in the environment. 478 \param id An identifier for the tab. 479 \return Pointer to the created tab. Returns 0 if an 480 error occurred. This pointer should not be dropped. See 481 IReferenceCounted::drop() for more information. */ 482 virtual IGUITab* addTab(const core::rect<s32>& rectangle, 483 IGUIElement* parent=0, s32 id=-1) = 0; 484 485 //! Adds a context menu to the environment. 486 /** \param rectangle Rectangle specifying the borders of the menu. 487 Note that the menu is resizing itself based on what items you add. 488 \param parent Parent item of the element, e.g. a window. 489 Set it to 0 to place the menu directly in the environment. 490 \param id An identifier for the menu. 491 \return Pointer to the created context menu. Returns 0 if an 492 error occurred. This pointer should not be dropped. See 493 IReferenceCounted::drop() for more information. */ 494 virtual IGUIContextMenu* addContextMenu(const core::rect<s32>& rectangle, 495 IGUIElement* parent=0, s32 id=-1) = 0; 496 497 //! Adds a menu to the environment. 498 /** This is like the menu you can find on top of most windows in modern 499 graphical user interfaces. 500 \param parent Parent item of the element, e.g. a window. 501 Set it to 0 to place the menu directly in the environment. 502 \param id An identifier for the menu. 503 \return Pointer to the created menu. Returns 0 if an 504 error occurred. This pointer should not be dropped. See 505 IReferenceCounted::drop() for more information. */ 506 virtual IGUIContextMenu* addMenu(IGUIElement* parent=0, s32 id=-1) = 0; 507 508 //! Adds a toolbar to the environment. 509 /** It is like a menu that is always placed on top of its parent, and 510 contains buttons. 511 \param parent Parent item of the element, e.g. a window. 512 Set it to 0 to place the tool bar directly in the environment. 513 \param id An identifier for the tool bar. 514 \return Pointer to the created tool bar. Returns 0 if an 515 error occurred. This pointer should not be dropped. See 516 IReferenceCounted::drop() for more information. */ 517 virtual IGUIToolBar* addToolBar(IGUIElement* parent=0, s32 id=-1) = 0; 518 519 //! Adds a combo box to the environment. 520 /** \param rectangle Rectangle specifying the borders of the combo box. 521 \param parent Parent item of the element, e.g. a window. 522 Set it to 0 to place the combo box directly in the environment. 523 \param id An identifier for the combo box. 524 \return Pointer to the created combo box. Returns 0 if an 525 error occurred. This pointer should not be dropped. See 526 IReferenceCounted::drop() for more information. */ 527 virtual IGUIComboBox* addComboBox(const core::rect<s32>& rectangle, 528 IGUIElement* parent=0, s32 id=-1) = 0; 529 530 //! Adds a table to the environment 531 /** \param rectangle Rectangle specifying the borders of the table. 532 \param parent Parent item of the element, e.g. a window. Set it to 0 533 to place the element directly in the environment. 534 \param id An identifier for the table. 535 \param drawBackground Flag whether the background should be drawn. 536 \return Pointer to the created table. Returns 0 if an error occurred. 537 This pointer should not be dropped. See IReferenceCounted::drop() for 538 more information. */ 539 virtual IGUITable* addTable(const core::rect<s32>& rectangle, 540 IGUIElement* parent=0, s32 id=-1, bool drawBackground=false) =0; 541 542 //! Get the default element factory which can create all built-in elements 543 /** \return Pointer to the factory. 544 This pointer should not be dropped. See IReferenceCounted::drop() for 545 more information. */ 546 virtual IGUIElementFactory* getDefaultGUIElementFactory() const = 0; 547 548 //! Adds an element factory to the gui environment. 549 /** Use this to extend the gui environment with new element types which 550 it should be able to create automatically, for example when loading 551 data from xml files. 552 \param factoryToAdd Pointer to new factory. */ 553 virtual void registerGUIElementFactory(IGUIElementFactory* factoryToAdd) = 0; 554 555 //! Get amount of registered gui element factories. 556 /** \return Amount of registered gui element factories. */ 557 virtual u32 getRegisteredGUIElementFactoryCount() const = 0; 558 559 //! Get a gui element factory by index 560 /** \param index Index of the factory. 561 \return Factory at given index, or 0 if no such factory exists. */ 562 virtual IGUIElementFactory* getGUIElementFactory(u32 index) const = 0; 563 564 //! Adds a GUI element by its name 565 /** Each factory is checked if it can create an element of the given 566 name. The first match will be created. 567 \param elementName Name of the element to be created. 568 \param parent Parent of the new element, if not 0. 569 \return New GUI element, or 0 if no such element exists. */ 570 virtual IGUIElement* addGUIElement(const c8* elementName, IGUIElement* parent=0) = 0; 571 572 //! Saves the current gui into a file. 573 /** \param filename Name of the file. 574 \param start The GUIElement to start with. Root if 0. 575 \return True if saving succeeded, else false. */ 576 virtual bool saveGUI(const io::path& filename, IGUIElement* start=0) = 0; 577 578 //! Saves the current gui into a file. 579 /** \param file The file to write to. 580 \param start The GUIElement to start with. Root if 0. 581 \return True if saving succeeded, else false. */ 582 virtual bool saveGUI(io::IWriteFile* file, IGUIElement* start=0) = 0; 583 584 //! Loads the gui. Note that the current gui is not cleared before. 585 /** When a parent is set the elements will be added below the parent, the parent itself does not deserialize. 586 When the file contains skin-settings from the gui-environment those are always serialized into the 587 guienvironment independent of the parent setting. 588 \param filename Name of the file. 589 \param parent Parent for the loaded GUI, root if 0. 590 \return True if loading succeeded, else false. */ 591 virtual bool loadGUI(const io::path& filename, IGUIElement* parent=0) = 0; 592 593 //! Loads the gui. Note that the current gui is not cleared before. 594 /** When a parent is set the elements will be added below the parent, the parent itself does not deserialize. 595 When the file contains skin-settings from the gui-environment those are always serialized into the 596 guienvironment independent of the parent setting. 597 \param file The file to load from. 598 \param parent Parent for the loaded GUI, root if 0. 599 \return True if loading succeeded, else false. */ 600 virtual bool loadGUI(io::IReadFile* file, IGUIElement* parent=0) = 0; 601 602 //! Writes attributes of the gui environment 603 virtual void serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options=0) const =0; 604 605 //! Reads attributes of the gui environment 606 virtual void deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options=0)=0; 607 608 //! writes an element 609 virtual void writeGUIElement(io::IXMLWriter* writer, IGUIElement* node) =0; 610 611 //! reads an element 612 virtual void readGUIElement(io::IXMLReader* reader, IGUIElement* node) =0; 613 }; 614 615 616 } // end namespace gui 617 } // end namespace irr 618 619 #endif 620 621