Using CEGUI with SDL and OpenGL (Latest)
From CEGUI Wiki - Crazy Eddie's GUI System (Open Source)
Written for CEGUI 0.8
Works with versions 0.8.x (stable)
Works with latest CEGUI stable!
SDL (Simple DirectMedia Layer) is an excellent library for writing portable games and other multimedia applications, but as it is a low-level library, it has no native support for GUI interfaces.
Before running I had to symlink/copy these files to current working directory of the binary:
- DejaVuSans-10.font
- DejaVuSans-12.font
- DejaVuSans.ttf
- TaharezLook.imageset
- TaharezLook.looknfeel
- TaharezLook.png
/* * Adapted by: Johnny Souza - johnnysouza.js@gmail.com * Date: 19/01/07 17:00 * Description: Using CEGUI with SDL and OpenGL */ #include <stdio.h> #include <stdlib.h> #include <SDL/SDL.h> #include "CEGUI/CEGUI.h" #include "CEGUI/RendererModules/OpenGL/GLRenderer.h" #include <GL/gl.h> #include <GL/glu.h> std::map<SDLKey, CEGUI::Key::Scan> m_keymap; void initializeKeyMap() { m_keymap[SDLK_1] = CEGUI::Key::One; m_keymap[SDLK_2] = CEGUI::Key::Two; m_keymap[SDLK_3] = CEGUI::Key::Three; m_keymap[SDLK_4] = CEGUI::Key::Four; m_keymap[SDLK_5] = CEGUI::Key::Five; m_keymap[SDLK_6] = CEGUI::Key::Six; m_keymap[SDLK_7] = CEGUI::Key::Seven; m_keymap[SDLK_8] = CEGUI::Key::Eight; m_keymap[SDLK_9] = CEGUI::Key::Nine; m_keymap[SDLK_0] = CEGUI::Key::Zero; m_keymap[SDLK_q] = CEGUI::Key::Q; m_keymap[SDLK_w] = CEGUI::Key::W; m_keymap[SDLK_e] = CEGUI::Key::E; m_keymap[SDLK_r] = CEGUI::Key::R; m_keymap[SDLK_t] = CEGUI::Key::T; m_keymap[SDLK_y] = CEGUI::Key::Y; m_keymap[SDLK_u] = CEGUI::Key::U; m_keymap[SDLK_i] = CEGUI::Key::I; m_keymap[SDLK_o] = CEGUI::Key::O; m_keymap[SDLK_p] = CEGUI::Key::P; m_keymap[SDLK_a] = CEGUI::Key::A; m_keymap[SDLK_s] = CEGUI::Key::S; m_keymap[SDLK_d] = CEGUI::Key::D; m_keymap[SDLK_f] = CEGUI::Key::F; m_keymap[SDLK_g] = CEGUI::Key::G; m_keymap[SDLK_h] = CEGUI::Key::H; m_keymap[SDLK_j] = CEGUI::Key::J; m_keymap[SDLK_k] = CEGUI::Key::K; m_keymap[SDLK_l] = CEGUI::Key::L; m_keymap[SDLK_z] = CEGUI::Key::Z; m_keymap[SDLK_x] = CEGUI::Key::X; m_keymap[SDLK_c] = CEGUI::Key::C; m_keymap[SDLK_v] = CEGUI::Key::V; m_keymap[SDLK_b] = CEGUI::Key::B; m_keymap[SDLK_n] = CEGUI::Key::N; m_keymap[SDLK_m] = CEGUI::Key::M; m_keymap[SDLK_COMMA] = CEGUI::Key::Comma; m_keymap[SDLK_PERIOD] = CEGUI::Key::Period; m_keymap[SDLK_SLASH] = CEGUI::Key::Slash; m_keymap[SDLK_BACKSLASH] = CEGUI::Key::Backslash; m_keymap[SDLK_MINUS] = CEGUI::Key::Minus; m_keymap[SDLK_EQUALS] = CEGUI::Key::Equals; m_keymap[SDLK_SEMICOLON] = CEGUI::Key::Semicolon; m_keymap[SDLK_LEFTBRACKET] = CEGUI::Key::LeftBracket; m_keymap[SDLK_RIGHTBRACKET] = CEGUI::Key::RightBracket; m_keymap[SDLK_QUOTE] = CEGUI::Key::Apostrophe; m_keymap[SDLK_BACKQUOTE] = CEGUI::Key::Grave; m_keymap[SDLK_RETURN] = CEGUI::Key::Return; m_keymap[SDLK_SPACE] = CEGUI::Key::Space; m_keymap[SDLK_BACKSPACE] = CEGUI::Key::Backspace; m_keymap[SDLK_TAB] = CEGUI::Key::Tab; m_keymap[SDLK_ESCAPE] = CEGUI::Key::Escape; m_keymap[SDLK_PAUSE] = CEGUI::Key::Pause; m_keymap[SDLK_SYSREQ] = CEGUI::Key::SysRq; m_keymap[SDLK_POWER] = CEGUI::Key::Power; m_keymap[SDLK_NUMLOCK] = CEGUI::Key::NumLock; m_keymap[SDLK_SCROLLOCK] = CEGUI::Key::ScrollLock; m_keymap[SDLK_F1] = CEGUI::Key::F1; m_keymap[SDLK_F2] = CEGUI::Key::F2; m_keymap[SDLK_F3] = CEGUI::Key::F3; m_keymap[SDLK_F4] = CEGUI::Key::F4; m_keymap[SDLK_F5] = CEGUI::Key::F5; m_keymap[SDLK_F6] = CEGUI::Key::F6; m_keymap[SDLK_F7] = CEGUI::Key::F7; m_keymap[SDLK_F8] = CEGUI::Key::F8; m_keymap[SDLK_F9] = CEGUI::Key::F9; m_keymap[SDLK_F10] = CEGUI::Key::F10; m_keymap[SDLK_F11] = CEGUI::Key::F11; m_keymap[SDLK_F12] = CEGUI::Key::F12; m_keymap[SDLK_F13] = CEGUI::Key::F13; m_keymap[SDLK_F14] = CEGUI::Key::F14; m_keymap[SDLK_F15] = CEGUI::Key::F15; m_keymap[SDLK_LCTRL] = CEGUI::Key::LeftControl; m_keymap[SDLK_LALT] = CEGUI::Key::LeftAlt; m_keymap[SDLK_LSHIFT] = CEGUI::Key::LeftShift; m_keymap[SDLK_LSUPER] = CEGUI::Key::LeftWindows; m_keymap[SDLK_RCTRL] = CEGUI::Key::RightControl; m_keymap[SDLK_RALT] = CEGUI::Key::RightAlt; m_keymap[SDLK_RSHIFT] = CEGUI::Key::RightShift; m_keymap[SDLK_RSUPER] = CEGUI::Key::RightWindows; m_keymap[SDLK_MENU] = CEGUI::Key::AppMenu; m_keymap[SDLK_KP0] = CEGUI::Key::Numpad0; m_keymap[SDLK_KP1] = CEGUI::Key::Numpad1; m_keymap[SDLK_KP2] = CEGUI::Key::Numpad2; m_keymap[SDLK_KP3] = CEGUI::Key::Numpad3; m_keymap[SDLK_KP4] = CEGUI::Key::Numpad4; m_keymap[SDLK_KP5] = CEGUI::Key::Numpad5; m_keymap[SDLK_KP6] = CEGUI::Key::Numpad6; m_keymap[SDLK_KP7] = CEGUI::Key::Numpad7; m_keymap[SDLK_KP8] = CEGUI::Key::Numpad8; m_keymap[SDLK_KP9] = CEGUI::Key::Numpad9; m_keymap[SDLK_KP_PERIOD] = CEGUI::Key::Decimal; m_keymap[SDLK_KP_PLUS] = CEGUI::Key::Add; m_keymap[SDLK_KP_MINUS] = CEGUI::Key::Subtract; m_keymap[SDLK_KP_MULTIPLY] = CEGUI::Key::Multiply; m_keymap[SDLK_KP_DIVIDE] = CEGUI::Key::Divide; m_keymap[SDLK_KP_ENTER] = CEGUI::Key::NumpadEnter; m_keymap[SDLK_UP] = CEGUI::Key::ArrowUp; m_keymap[SDLK_LEFT] = CEGUI::Key::ArrowLeft; m_keymap[SDLK_RIGHT] = CEGUI::Key::ArrowRight; m_keymap[SDLK_DOWN] = CEGUI::Key::ArrowDown; m_keymap[SDLK_HOME] = CEGUI::Key::Home; m_keymap[SDLK_END] = CEGUI::Key::End; m_keymap[SDLK_PAGEUP] = CEGUI::Key::PageUp; m_keymap[SDLK_PAGEDOWN] = CEGUI::Key::PageDown; m_keymap[SDLK_INSERT] = CEGUI::Key::Insert; m_keymap[SDLK_DELETE] = CEGUI::Key::Delete; } void handle_mouse_down(Uint8 button) { CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext(); switch ( button ) { case SDL_BUTTON_LEFT: context.injectMouseButtonDown(CEGUI::LeftButton); break; case SDL_BUTTON_MIDDLE: context.injectMouseButtonDown(CEGUI::MiddleButton); break; case SDL_BUTTON_RIGHT: context.injectMouseButtonDown(CEGUI::RightButton); break; case SDL_BUTTON_WHEELDOWN: context.injectMouseWheelChange( -1 ); break; case SDL_BUTTON_WHEELUP: context.injectMouseWheelChange( +1 ); break; } } void handle_mouse_up(Uint8 button) { CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext(); switch ( button ) { case SDL_BUTTON_LEFT: context.injectMouseButtonUp(CEGUI::LeftButton); break; case SDL_BUTTON_MIDDLE: context.injectMouseButtonUp(CEGUI::MiddleButton); break; case SDL_BUTTON_RIGHT: context.injectMouseButtonUp(CEGUI::RightButton); break; } } void inject_input (bool & must_quit) { CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext(); initializeKeyMap(); SDL_Event e; /* go through all available events */ while (SDL_PollEvent(&e)) { /* we use a switch to determine the event type */ switch (e.type) { /* mouse motion handler */ case SDL_MOUSEMOTION: /* we inject the mouse position directly. */ // CEGUI::System::getSingleton().injectMousePosition(static_cast<float>(e.motion.x),static_cast<float>(e.motion.y)); context.injectMousePosition( static_cast<float>(e.motion.x),static_cast<float>(e.motion.y) ); break; /* mouse down handler */ case SDL_MOUSEBUTTONDOWN: /* let a special function handle the mouse button down event */ handle_mouse_down (e.button.button); break; /* mouse up handler */ case SDL_MOUSEBUTTONUP: /* let a special function handle the mouse button up event */ handle_mouse_up (e.button.button); break; /* key down */ case SDL_KEYDOWN: /* to tell CEGUI that a key was pressed, we inject the scancode. */ //e.key.keysym.scancode context.injectKeyDown(m_keymap[e.key.keysym.sym]); /* as for the character it's a litte more complicated. * we'll use for translated unicode value. * this is described in more detail below. */ if ((e.key.keysym.unicode & 0xFF80) == 0) { context.injectChar(e.key.keysym.unicode & 0x7F); } break; /* key up */ case SDL_KEYUP: /* like before we inject the scancode directly. */ //e.key.keysym.scancode context.injectKeyUp(m_keymap[e.key.keysym.sym]); break; /* WM quit event occured */ case SDL_QUIT: must_quit = true; break; case SDL_VIDEORESIZE: CEGUI::System::getSingleton().notifyDisplaySizeChanged(CEGUI::Sizef(e.resize.w,e.resize.h)); break; } } } void inject_time_pulse(double& last_time_pulse) { /* get current "run-time" in seconds */ double t = 0.001*SDL_GetTicks(); /* inject the time that passed since the last call */ CEGUI::System::getSingleton().injectTimePulse( float(t-last_time_pulse) ); /* store the new time as the last time */ last_time_pulse = t; } void render_gui() { /* clear the colour buffer */ glClear( GL_COLOR_BUFFER_BIT ); /* render the GUI :) */ CEGUI::System::getSingleton().renderAllGUIContexts(); /* Update the screen */ SDL_GL_SwapBuffers(); } void main_loop () { bool must_quit = false; /* get "run-time" in seconds */ double last_time_pulse = 0.001*static_cast<double>(SDL_GetTicks()); while (!must_quit) { inject_input (must_quit); inject_time_pulse (last_time_pulse); render_gui (); } } int main (int argc, char **argv) { SDL_Surface * screen; atexit (SDL_Quit); SDL_Init (SDL_INIT_VIDEO); screen = SDL_SetVideoMode (600, 480, 0, SDL_OPENGL); if (screen == NULL) { /* Se ainda não der, desiste! */ fprintf (stderr, "Impossível ajustar ao vídeo: %s\n", SDL_GetError ()); exit (1); } CEGUI::OpenGLRenderer::bootstrapSystem(); SDL_ShowCursor (SDL_DISABLE); SDL_EnableUNICODE (1); SDL_EnableKeyRepeat (SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL); using namespace CEGUI; SchemeManager::getSingleton().createFromFile( "/opt/cegui-0.8.4/share/cegui-0/schemes/TaharezLook.scheme" ); FontManager::getSingleton().createFromFile( "/opt/cegui-0.8.4/share/cegui-0/fonts/DejaVuSans-10.font" ); System::getSingleton().getDefaultGUIContext().setDefaultFont( "DejaVuSans-10" ); System::getSingleton().getDefaultGUIContext().getMouseCursor().setDefaultImage( "TaharezLook/MouseArrow" ); System::getSingleton().getDefaultGUIContext().setDefaultTooltipType( "TaharezLook/Tooltip" ); WindowManager& wmgr = WindowManager::getSingleton(); Window* myRoot = wmgr.createWindow( "DefaultWindow", "root" ); System::getSingleton().getDefaultGUIContext().setRootWindow( myRoot ); FrameWindow* fWnd = static_cast<FrameWindow*>( wmgr.createWindow( "TaharezLook/FrameWindow", "testWindow" )); myRoot->addChild( fWnd ); // position a quarter of the way in from the top-left of parent. fWnd->setPosition( UVector2( UDim( 0.25f, 0.0f ), UDim( 0.25f, 0.0f ) ) ); // set size to be half the size of the parent fWnd->setSize( USize( UDim( 0.5f, 0.0f ), UDim( 0.5f, 0.0f ) ) ); fWnd->setText( "Hello World!" ); main_loop(); }