130 lines
4.5 KiB
C
130 lines
4.5 KiB
C
// ---------------------------------------------------------------------------
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//
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// @file TwEventSDL13.c
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// @brief Helper:
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// translate and re-send mouse and keyboard events
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// from SDL 1.3 event loop to AntTweakBar
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//
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// @author Philippe Decaudin
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// @license This file is part of the AntTweakBar library.
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// For conditions of distribution and use, see License.txt
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//
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// ---------------------------------------------------------------------------
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#include "MiniSDL13.h" // a subset of SDL.h needed to compile TwEventSDL.c
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// note: AntTweakBar.dll does not need to link with SDL,
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// it just needs some definitions for its helper functions.
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#include <AntTweakBar.h>
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// The way SDL handles keyboard events has changed between version 1.2
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// and 1.3. It is now more difficult to translate SDL keyboard events to
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// AntTweakBar events. The following code is an attempt to do so, but
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// it is rather complex and not always accurate (eg, CTRL+1 is not handled).
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// If someone knows a better and more robust way to do the keyboard events
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// translation, please let me know.
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// TwEventSDL returns zero if msg has not been handled,
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// and a non-zero value if it has been handled by the AntTweakBar library.
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int TW_CALL TwEventSDL13(const void *sdlEvent)
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{
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int handled = 0;
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static int s_KeyMod = 0;
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const SDL_Event *event = (const SDL_Event *)sdlEvent;
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if( event==NULL )
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return 0;
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switch( event->type )
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{
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case SDL_TEXTINPUT:
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if( event->text.text[0]!=0 && event->text.text[1]==0 )
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{
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if( s_KeyMod & TW_KMOD_CTRL && event->text.text[0]<32 )
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handled = TwKeyPressed(event->text.text[0]+'a'-1, s_KeyMod);
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else
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{
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if (s_KeyMod & KMOD_RALT)
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s_KeyMod &= ~KMOD_CTRL;
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handled = TwKeyPressed(event->text.text[0], s_KeyMod);
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}
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}
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s_KeyMod = 0;
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break;
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case SDL_KEYDOWN:
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if( event->key.keysym.sym & SDLK_SCANCODE_MASK )
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{
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int key = 0;
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switch( event->key.keysym.sym )
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{
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case SDLK_UP:
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key = TW_KEY_UP;
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break;
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case SDLK_DOWN:
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key = TW_KEY_DOWN;
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break;
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case SDLK_RIGHT:
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key = TW_KEY_RIGHT;
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break;
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case SDLK_LEFT:
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key = TW_KEY_LEFT;
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break;
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case SDLK_INSERT:
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key = TW_KEY_INSERT;
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break;
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case SDLK_HOME:
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key = TW_KEY_HOME;
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break;
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case SDLK_END:
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key = TW_KEY_END;
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break;
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case SDLK_PAGEUP:
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key = TW_KEY_PAGE_UP;
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break;
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case SDLK_PAGEDOWN:
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key = TW_KEY_PAGE_DOWN;
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break;
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default:
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if( event->key.keysym.sym>=SDLK_F1 && event->key.keysym.sym<=SDLK_F12 )
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key = event->key.keysym.sym + TW_KEY_F1 - SDLK_F1;
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}
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if( key!=0 )
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handled = TwKeyPressed(key, event->key.keysym.mod);
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}
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else if( event->key.keysym.mod & TW_KMOD_ALT )
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handled = TwKeyPressed(event->key.keysym.sym & 0xFF, event->key.keysym.mod);
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else
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s_KeyMod = event->key.keysym.mod;
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break;
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case SDL_KEYUP:
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s_KeyMod = 0;
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break;
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case SDL_MOUSEMOTION:
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handled = TwMouseMotion(event->motion.x, event->motion.y);
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break;
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case SDL_MOUSEBUTTONUP:
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case SDL_MOUSEBUTTONDOWN:
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if( event->type==SDL_MOUSEBUTTONDOWN && (event->button.button==4 || event->button.button==5) ) // mouse wheel
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{
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static int s_WheelPos = 0;
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if( event->button.button==4 )
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++s_WheelPos;
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else
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--s_WheelPos;
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handled = TwMouseWheel(s_WheelPos);
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}
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else
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handled = TwMouseButton((event->type==SDL_MOUSEBUTTONUP)?TW_MOUSE_RELEASED:TW_MOUSE_PRESSED, (TwMouseButtonID)event->button.button);
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break;
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case SDL_VIDEORESIZE:
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// tell the new size to TweakBar
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TwWindowSize(event->resize.w, event->resize.h);
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// do not set 'handled', SDL_VIDEORESIZE may be also processed by the calling application
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break;
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}
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return handled;
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}
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