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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/scummsys.h"
#if defined(SDL_BACKEND)
#include "backends/events/sdl/sdl-events.h"
#include "backends/platform/sdl/sdl.h"
#include "backends/graphics/graphics.h"
#include "common/config-manager.h"
#include "common/textconsole.h"
#include "common/fs.h"
// FIXME move joystick defines out and replace with confile file options
// we should really allow users to map any key to a joystick button
// #define JOY_INVERT_Y
#define JOY_XAXIS 0
#define JOY_YAXIS 1
// buttons
#define JOY_BUT_LMOUSE 0
#define JOY_BUT_RMOUSE 2
#define JOY_BUT_ESCAPE 3
#define JOY_BUT_PERIOD 1
#define JOY_BUT_SPACE 4
#define JOY_BUT_F5 5
#ifdef ENABLE_VKEYBD
#define JOY_BUT_VKEYBOARD 7
#endif
#if SDL_VERSION_ATLEAST(2, 0, 0)
#define GAMECONTROLLERDB_FILE "gamecontrollerdb.txt"
static uint32 convUTF8ToUTF32(const char *src) {
uint32 utf32 = 0;
char *dst = SDL_iconv_string(
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
"UTF-32BE",
#else
"UTF-32LE",
#endif
"UTF-8", src, SDL_strlen(src) + 1);
if (dst) {
utf32 = *((uint32 *)dst);
SDL_free(dst);
}
return utf32;
}
void SdlEventSource::loadGameControllerMappingFile() {
bool loaded = false;
if (ConfMan.hasKey("controller_map_db")) {
Common::FSNode file = Common::FSNode(ConfMan.get("controller_map_db"));
if (file.exists()) {
if (SDL_GameControllerAddMappingsFromFile(file.getPath().c_str()) < 0)
error("File %s not valid: %s", file.getPath().c_str(), SDL_GetError());
else {
loaded = true;
debug("Game controller DB file loaded: %s", file.getPath().c_str());
}
} else
warning("Game controller DB file not found: %s", file.getPath().c_str());
}
if (!loaded && ConfMan.hasKey("extrapath")) {
Common::FSNode dir = Common::FSNode(ConfMan.get("extrapath"));
Common::FSNode file = dir.getChild(GAMECONTROLLERDB_FILE);
if (file.exists()) {
if (SDL_GameControllerAddMappingsFromFile(file.getPath().c_str()) < 0)
error("File %s not valid: %s", file.getPath().c_str(), SDL_GetError());
else
debug("Game controller DB file loaded: %s", file.getPath().c_str());
}
}
}
#endif
SdlEventSource::SdlEventSource()
: EventSource(), _scrollLock(false), _joystick(0), _lastScreenID(0), _graphicsManager(0), _queuedFakeMouseMove(false)
#if SDL_VERSION_ATLEAST(2, 0, 0)
, _queuedFakeKeyUp(false), _fakeKeyUp(), _controller(nullptr)
#endif
{
// Reset mouse state
memset(&_km, 0, sizeof(_km));
int joystick_num = ConfMan.getInt("joystick_num");
if (joystick_num >= 0) {
// Initialize SDL joystick subsystem
if (SDL_InitSubSystem(SDL_INIT_JOYSTICK) == -1) {
error("Could not initialize SDL: %s", SDL_GetError());
}
#if SDL_VERSION_ATLEAST(2, 0, 0)
if (SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER) == -1) {
error("Could not initialize SDL: %s", SDL_GetError());
}
loadGameControllerMappingFile();
#endif
openJoystick(joystick_num);
}
}
SdlEventSource::~SdlEventSource() {
closeJoystick();
}
int SdlEventSource::mapKey(SDLKey sdlKey, SDLMod mod, Uint16 unicode) {
Common::KeyCode key = SDLToOSystemKeycode(sdlKey);
// Keep unicode in case it's regular ASCII text or in case we didn't get a valid keycode
//
// We need to use unicode in those cases, simply because SDL1.x passes us non-layout-adjusted keycodes.
// So unicode is the only way to get layout-adjusted keys.
if (unicode < 0x20) {
// don't use unicode, in case it's control characters
unicode = 0;
} else {
// Use unicode, in case keycode is invalid.
// Umlauts and others will set KEYCODE_INVALID on SDL2, so in such a case always keep unicode.
if (key != Common::KEYCODE_INVALID) {
// keycode is valid, check further also depending on modifiers
if (mod & (KMOD_CTRL | KMOD_ALT)) {
// Ctrl and/or Alt is active
//
// We need to restrict unicode to only up to 0x7E, because on macOS the option/alt key will switch to
// an alternate keyboard, which will cause us to receive Unicode characters for some keys, which are outside
// of the ASCII range (e.g. alt-x will get us U+2248). We need to return 'x' for alt-x, so using unicode
// in that case would break alt-shortcuts.
if (unicode > 0x7E)
unicode = 0; // do not allow any characters above 0x7E
} else {
// We must not restrict as much as when Ctrl/Alt-modifiers are active, otherwise
// we wouldn't let umlauts through for SDL1. For SDL1 umlauts may set for example KEYCODE_QUOTE, KEYCODE_MINUS, etc.
if (unicode > 0xFF)
unicode = 0; // do not allow any characters above 0xFF
}
}
}
// Attention:
// When using SDL1.x, we will get scancodes via sdlKey, that are raw scancodes, so NOT adjusted to keyboard layout/
// mapping. So for example for certain locales, we will get KEYCODE_y, when 'z' is pressed and so on.
// When using SDL2.x however, we will get scancodes based on the keyboard layout.
if (key >= Common::KEYCODE_F1 && key <= Common::KEYCODE_F9) {
return key - Common::KEYCODE_F1 + Common::ASCII_F1;
} else if (key >= Common::KEYCODE_KP0 && key <= Common::KEYCODE_KP9) {
// WORKAROUND: Disable this change for AmigaOS4 as it is breaking numpad usage ("fighting") on that platform.
// This fixes bug #10558.
// The actual issue here is that the SCUMM engine uses ASCII codes instead of keycodes for input.
// See also the relevant FIXME in SCUMM's input.cpp.
#ifndef __amigaos4__
if ((mod & KMOD_NUM) == 0)
return 0; // In case Num-Lock is NOT enabled, return 0 for ascii, so that directional keys on numpad work
#endif
return key - Common::KEYCODE_KP0 + '0';
} else if (key >= Common::KEYCODE_UP && key <= Common::KEYCODE_PAGEDOWN) {
return key;
} else if (unicode) {
// Return unicode in case it's still set and wasn't filtered.
return unicode;
} else if (key >= 'a' && key <= 'z' && (mod & KMOD_SHIFT)) {
return key & ~0x20;
} else if (key >= Common::KEYCODE_NUMLOCK && key <= Common::KEYCODE_EURO) {
return 0;
} else {
return key;
}
}
bool SdlEventSource::processMouseEvent(Common::Event &event, int x, int y) {
event.mouse.x = x;
event.mouse.y = y;
if (_graphicsManager) {
return _graphicsManager->notifyMousePosition(event.mouse);
}
return true;
}
void SdlEventSource::updateKbdMouse() {
uint32 curTime = g_system->getMillis(true);
if (curTime < _km.last_time + _km.delay_time) {
return;
}
_km.last_time = curTime;
if (_km.x_down_count == 1) {
_km.x_down_time = curTime;
_km.x_down_count = 2;
}
if (_km.y_down_count == 1) {
_km.y_down_time = curTime;
_km.y_down_count = 2;
}
if (_km.x_vel || _km.y_vel) {
if (_km.x_down_count) {
if (curTime > _km.x_down_time + 300) {
if (_km.x_vel > 0)
_km.x_vel += MULTIPLIER;
else
_km.x_vel -= MULTIPLIER;
} else if (curTime > _km.x_down_time + 200) {
if (_km.x_vel > 0)
_km.x_vel = 5 * MULTIPLIER;
else
_km.x_vel = -5 * MULTIPLIER;
}
}
if (_km.y_down_count) {
if (curTime > _km.y_down_time + 300) {
if (_km.y_vel > 0)
_km.y_vel += MULTIPLIER;
else
_km.y_vel -= MULTIPLIER;
} else if (curTime > _km.y_down_time + 200) {
if (_km.y_vel > 0)
_km.y_vel = 5 * MULTIPLIER;
else
_km.y_vel = -5 * MULTIPLIER;
}
}
int16 speedFactor = computeJoystickMouseSpeedFactor();
// - The modifier key makes the mouse movement slower
// - The extra factor "delay/speedFactor" ensures velocities
// are independent of the kbdMouse update rate
// - all velocities were originally chosen
// at a delay of 25, so that is the reference used here
// - note: operator order is important to avoid overflow
if (_km.modifier) {
_km.x += ((_km.x_vel / 10) * ((int16)_km.delay_time)) / speedFactor;
_km.y += ((_km.y_vel / 10) * ((int16)_km.delay_time)) / speedFactor;
} else {
_km.x += (_km.x_vel * ((int16)_km.delay_time)) / speedFactor;
_km.y += (_km.y_vel * ((int16)_km.delay_time)) / speedFactor;
}
if (_km.x < 0) {
_km.x = 0;
_km.x_vel = -1 * MULTIPLIER;
_km.x_down_count = 1;
} else if (_km.x > _km.x_max * MULTIPLIER) {
_km.x = _km.x_max * MULTIPLIER;
_km.x_vel = 1 * MULTIPLIER;
_km.x_down_count = 1;
}
if (_km.y < 0) {
_km.y = 0;
_km.y_vel = -1 * MULTIPLIER;
_km.y_down_count = 1;
} else if (_km.y > _km.y_max * MULTIPLIER) {
_km.y = _km.y_max * MULTIPLIER;
_km.y_vel = 1 * MULTIPLIER;
_km.y_down_count = 1;
}
}
}
bool SdlEventSource::handleKbdMouse(Common::Event &event) {
int16 oldKmX = _km.x;
int16 oldKmY = _km.y;
updateKbdMouse();
if (_km.x != oldKmX || _km.y != oldKmY) {
if (_graphicsManager) {
_graphicsManager->getWindow()->warpMouseInWindow((Uint16)(_km.x / MULTIPLIER), (Uint16)(_km.y / MULTIPLIER));
}
event.type = Common::EVENT_MOUSEMOVE;
return processMouseEvent(event, _km.x / MULTIPLIER, _km.y / MULTIPLIER);
}
return false;
}
int16 SdlEventSource::computeJoystickMouseSpeedFactor() const {
int16 speedFactor;
switch (ConfMan.getInt("kbdmouse_speed")) {
// 0.25 keyboard pointer speed
case 0:
speedFactor = 100;
break;
// 0.5 speed
case 1:
speedFactor = 50;
break;
// 0.75 speed
case 2:
speedFactor = 33;
break;
// 1.0 speed
case 3:
speedFactor = 25;
break;
// 1.25 speed
case 4:
speedFactor = 20;
break;
// 1.5 speed
case 5:
speedFactor = 17;
break;
// 1.75 speed
case 6:
speedFactor = 14;
break;
// 2.0 speed
case 7:
speedFactor = 12;
break;
default:
speedFactor = 25;
}
// Scale the mouse cursor speed with the display size so moving across
// the screen takes a reasonable amount of time at higher resolutions.
return speedFactor * 480 / _km.y_max;
}
void SdlEventSource::SDLModToOSystemKeyFlags(SDLMod mod, Common::Event &event) {
event.kbd.flags = 0;
if (mod & KMOD_SHIFT)
event.kbd.flags |= Common::KBD_SHIFT;
if (mod & KMOD_ALT)
event.kbd.flags |= Common::KBD_ALT;
if (mod & KMOD_CTRL)
event.kbd.flags |= Common::KBD_CTRL;
if (mod & KMOD_META)
event.kbd.flags |= Common::KBD_META;
// Sticky flags
if (mod & KMOD_NUM)
event.kbd.flags |= Common::KBD_NUM;
if (mod & KMOD_CAPS)
event.kbd.flags |= Common::KBD_CAPS;
}
Common::KeyCode SdlEventSource::SDLToOSystemKeycode(const SDLKey key) {
switch (key) {
case SDLK_BACKSPACE: return Common::KEYCODE_BACKSPACE;
case SDLK_TAB: return Common::KEYCODE_TAB;
case SDLK_CLEAR: return Common::KEYCODE_CLEAR;
case SDLK_RETURN: return Common::KEYCODE_RETURN;
case SDLK_PAUSE: return Common::KEYCODE_PAUSE;
case SDLK_ESCAPE: return Common::KEYCODE_ESCAPE;
case SDLK_SPACE: return Common::KEYCODE_SPACE;
case SDLK_EXCLAIM: return Common::KEYCODE_EXCLAIM;
case SDLK_QUOTEDBL: return Common::KEYCODE_QUOTEDBL;
case SDLK_HASH: return Common::KEYCODE_HASH;
case SDLK_DOLLAR: return Common::KEYCODE_DOLLAR;
case SDLK_AMPERSAND: return Common::KEYCODE_AMPERSAND;
case SDLK_QUOTE: return Common::KEYCODE_QUOTE;
case SDLK_LEFTPAREN: return Common::KEYCODE_LEFTPAREN;
case SDLK_RIGHTPAREN: return Common::KEYCODE_RIGHTPAREN;
case SDLK_ASTERISK: return Common::KEYCODE_ASTERISK;
case SDLK_PLUS: return Common::KEYCODE_PLUS;
case SDLK_COMMA: return Common::KEYCODE_COMMA;
case SDLK_MINUS: return Common::KEYCODE_MINUS;
case SDLK_PERIOD: return Common::KEYCODE_PERIOD;
case SDLK_SLASH: return Common::KEYCODE_SLASH;
case SDLK_0: return Common::KEYCODE_0;
case SDLK_1: return Common::KEYCODE_1;
case SDLK_2: return Common::KEYCODE_2;
case SDLK_3: return Common::KEYCODE_3;
case SDLK_4: return Common::KEYCODE_4;
case SDLK_5: return Common::KEYCODE_5;
case SDLK_6: return Common::KEYCODE_6;
case SDLK_7: return Common::KEYCODE_7;
case SDLK_8: return Common::KEYCODE_8;
case SDLK_9: return Common::KEYCODE_9;
case SDLK_COLON: return Common::KEYCODE_COLON;
case SDLK_SEMICOLON: return Common::KEYCODE_SEMICOLON;
case SDLK_LESS: return Common::KEYCODE_LESS;
case SDLK_EQUALS: return Common::KEYCODE_EQUALS;
case SDLK_GREATER: return Common::KEYCODE_GREATER;
case SDLK_QUESTION: return Common::KEYCODE_QUESTION;
case SDLK_AT: return Common::KEYCODE_AT;
case SDLK_LEFTBRACKET: return Common::KEYCODE_LEFTBRACKET;
case SDLK_BACKSLASH: return Common::KEYCODE_BACKSLASH;
case SDLK_RIGHTBRACKET: return Common::KEYCODE_RIGHTBRACKET;
case SDLK_CARET: return Common::KEYCODE_CARET;
case SDLK_UNDERSCORE: return Common::KEYCODE_UNDERSCORE;
case SDLK_BACKQUOTE: return Common::KEYCODE_BACKQUOTE;
case SDLK_a: return Common::KEYCODE_a;
case SDLK_b: return Common::KEYCODE_b;
case SDLK_c: return Common::KEYCODE_c;
case SDLK_d: return Common::KEYCODE_d;
case SDLK_e: return Common::KEYCODE_e;
case SDLK_f: return Common::KEYCODE_f;
case SDLK_g: return Common::KEYCODE_g;
case SDLK_h: return Common::KEYCODE_h;
case SDLK_i: return Common::KEYCODE_i;
case SDLK_j: return Common::KEYCODE_j;
case SDLK_k: return Common::KEYCODE_k;
case SDLK_l: return Common::KEYCODE_l;
case SDLK_m: return Common::KEYCODE_m;
case SDLK_n: return Common::KEYCODE_n;
case SDLK_o: return Common::KEYCODE_o;
case SDLK_p: return Common::KEYCODE_p;
case SDLK_q: return Common::KEYCODE_q;
case SDLK_r: return Common::KEYCODE_r;
case SDLK_s: return Common::KEYCODE_s;
case SDLK_t: return Common::KEYCODE_t;
case SDLK_u: return Common::KEYCODE_u;
case SDLK_v: return Common::KEYCODE_v;
case SDLK_w: return Common::KEYCODE_w;
case SDLK_x: return Common::KEYCODE_x;
case SDLK_y: return Common::KEYCODE_y;
case SDLK_z: return Common::KEYCODE_z;
case SDLK_DELETE: return Common::KEYCODE_DELETE;
#if SDL_VERSION_ATLEAST(2, 0, 0)
case SDL_SCANCODE_TO_KEYCODE(SDL_SCANCODE_GRAVE): return Common::KEYCODE_TILDE;
#else
case SDLK_WORLD_16: return Common::KEYCODE_TILDE;
#endif
case SDLK_KP0: return Common::KEYCODE_KP0;
case SDLK_KP1: return Common::KEYCODE_KP1;
case SDLK_KP2: return Common::KEYCODE_KP2;
case SDLK_KP3: return Common::KEYCODE_KP3;
case SDLK_KP4: return Common::KEYCODE_KP4;
case SDLK_KP5: return Common::KEYCODE_KP5;
case SDLK_KP6: return Common::KEYCODE_KP6;
case SDLK_KP7: return Common::KEYCODE_KP7;
case SDLK_KP8: return Common::KEYCODE_KP8;
case SDLK_KP9: return Common::KEYCODE_KP9;
case SDLK_KP_PERIOD: return Common::KEYCODE_KP_PERIOD;
case SDLK_KP_DIVIDE: return Common::KEYCODE_KP_DIVIDE;
case SDLK_KP_MULTIPLY: return Common::KEYCODE_KP_MULTIPLY;
case SDLK_KP_MINUS: return Common::KEYCODE_KP_MINUS;
case SDLK_KP_PLUS: return Common::KEYCODE_KP_PLUS;
case SDLK_KP_ENTER: return Common::KEYCODE_KP_ENTER;
case SDLK_KP_EQUALS: return Common::KEYCODE_KP_EQUALS;
case SDLK_UP: return Common::KEYCODE_UP;
case SDLK_DOWN: return Common::KEYCODE_DOWN;
case SDLK_RIGHT: return Common::KEYCODE_RIGHT;
case SDLK_LEFT: return Common::KEYCODE_LEFT;
case SDLK_INSERT: return Common::KEYCODE_INSERT;
case SDLK_HOME: return Common::KEYCODE_HOME;
case SDLK_END: return Common::KEYCODE_END;
case SDLK_PAGEUP: return Common::KEYCODE_PAGEUP;
case SDLK_PAGEDOWN: return Common::KEYCODE_PAGEDOWN;
case SDLK_F1: return Common::KEYCODE_F1;
case SDLK_F2: return Common::KEYCODE_F2;
case SDLK_F3: return Common::KEYCODE_F3;
case SDLK_F4: return Common::KEYCODE_F4;
case SDLK_F5: return Common::KEYCODE_F5;
case SDLK_F6: return Common::KEYCODE_F6;
case SDLK_F7: return Common::KEYCODE_F7;
case SDLK_F8: return Common::KEYCODE_F8;
case SDLK_F9: return Common::KEYCODE_F9;
case SDLK_F10: return Common::KEYCODE_F10;
case SDLK_F11: return Common::KEYCODE_F11;
case SDLK_F12: return Common::KEYCODE_F12;
case SDLK_F13: return Common::KEYCODE_F13;
case SDLK_F14: return Common::KEYCODE_F14;
case SDLK_F15: return Common::KEYCODE_F15;
case SDLK_NUMLOCK: return Common::KEYCODE_NUMLOCK;
case SDLK_CAPSLOCK: return Common::KEYCODE_CAPSLOCK;
case SDLK_SCROLLOCK: return Common::KEYCODE_SCROLLOCK;
case SDLK_RSHIFT: return Common::KEYCODE_RSHIFT;
case SDLK_LSHIFT: return Common::KEYCODE_LSHIFT;
case SDLK_RCTRL: return Common::KEYCODE_RCTRL;
case SDLK_LCTRL: return Common::KEYCODE_LCTRL;
case SDLK_RALT: return Common::KEYCODE_RALT;
case SDLK_LALT: return Common::KEYCODE_LALT;
case SDLK_LSUPER: return Common::KEYCODE_LSUPER;
case SDLK_RSUPER: return Common::KEYCODE_RSUPER;
case SDLK_MODE: return Common::KEYCODE_MODE;
case SDLK_COMPOSE: return Common::KEYCODE_COMPOSE;
case SDLK_HELP: return Common::KEYCODE_HELP;
case SDLK_PRINT: return Common::KEYCODE_PRINT;
case SDLK_SYSREQ: return Common::KEYCODE_SYSREQ;
#if !SDL_VERSION_ATLEAST(2, 0, 0)
case SDLK_BREAK: return Common::KEYCODE_BREAK;
#endif
case SDLK_MENU: return Common::KEYCODE_MENU;
case SDLK_POWER: return Common::KEYCODE_POWER;
case SDLK_UNDO: return Common::KEYCODE_UNDO;
default: return Common::KEYCODE_INVALID;
}
}
bool SdlEventSource::pollEvent(Common::Event &event) {
#if SDL_VERSION_ATLEAST(2, 0, 0)
// In case we still need to send a key up event for a key down from a
// TEXTINPUT event we do this immediately.
if (_queuedFakeKeyUp) {
event = _fakeKeyUp;
_queuedFakeKeyUp = false;
return true;
}
#endif
// If the screen changed, send an Common::EVENT_SCREEN_CHANGED
int screenID = ((OSystem_SDL *)g_system)->getGraphicsManager()->getScreenChangeID();
if (screenID != _lastScreenID) {
_lastScreenID = screenID;
event.type = Common::EVENT_SCREEN_CHANGED;
return true;
}
if (_queuedFakeMouseMove) {
event = _fakeMouseMove;
_queuedFakeMouseMove = false;
return true;
}
SDL_Event ev;
while (SDL_PollEvent(&ev)) {
preprocessEvents(&ev);
if (dispatchSDLEvent(ev, event))
return true;
}
// Handle mouse control via analog joystick and keyboard
if (handleKbdMouse(event)) {
return true;
}
return false;
}
bool SdlEventSource::dispatchSDLEvent(SDL_Event &ev, Common::Event &event) {
switch (ev.type) {
case SDL_KEYDOWN:
return handleKeyDown(ev, event);
case SDL_KEYUP:
return handleKeyUp(ev, event);
case SDL_MOUSEMOTION:
return handleMouseMotion(ev, event);
case SDL_MOUSEBUTTONDOWN:
return handleMouseButtonDown(ev, event);
case SDL_MOUSEBUTTONUP:
return handleMouseButtonUp(ev, event);
#if SDL_VERSION_ATLEAST(2, 0, 0)
case SDL_MOUSEWHEEL: {
Sint32 yDir = ev.wheel.y;
// HACK: It seems we want the mouse coordinates supplied
// with a mouse wheel event. However, SDL2 does not supply
// these, thus we use whatever we got last time. It seems
// these are always stored in _km.x, _km.y.
if (!processMouseEvent(event, _km.x / MULTIPLIER, _km.y / MULTIPLIER)) {
return false;
}
if (yDir < 0) {
event.type = Common::EVENT_WHEELDOWN;
return true;
} else if (yDir > 0) {
event.type = Common::EVENT_WHEELUP;
return true;
} else {
return false;
}
}
case SDL_TEXTINPUT: {
// When we get a TEXTINPUT event it means we got some user input for
// which no KEYDOWN exists. SDL 1.2 introduces a "fake" key down+up
// in such cases. We will do the same to mimic it's behavior.
event.type = Common::EVENT_KEYDOWN;
event.kbd = Common::KeyState(Common::KEYCODE_INVALID, convUTF8ToUTF32(ev.text.text), 0);
SDLModToOSystemKeyFlags(SDL_GetModState(), event);
// Set the scroll lock sticky flag
if (_scrollLock)
event.kbd.flags |= Common::KBD_SCRL;
// Fake a key up when we have a proper ascii value.
_queuedFakeKeyUp = (event.kbd.ascii != 0);
_fakeKeyUp = event;
_fakeKeyUp.type = Common::EVENT_KEYUP;
return _queuedFakeKeyUp;
}
case SDL_WINDOWEVENT:
switch (ev.window.event) {
case SDL_WINDOWEVENT_EXPOSED:
if (_graphicsManager)
_graphicsManager->notifyVideoExpose();
return false;
// SDL2 documentation indicate that SDL_WINDOWEVENT_SIZE_CHANGED is sent either as a result
// of the size being changed by an external event (for example the user resizing the window
// or going fullscreen) or a call to the SDL API (for example SDL_SetWindowSize). On the
// other hand SDL_WINDOWEVENT_RESIZED is only sent for resize resulting from an external event,
// and is always preceded by a SDL_WINDOWEVENT_SIZE_CHANGED event.
// We need to handle the programmatic resize as well so that the graphics manager always know
// the current size. See comments in SdlWindow::createOrUpdateWindow for details of one case
// where we need to call SDL_SetWindowSize and we need the resulting event to be processed.
// However if the documentation is correct we can ignore SDL_WINDOWEVENT_RESIZED since when we
// get one we should always get a SDL_WINDOWEVENT_SIZE_CHANGED as well.
case SDL_WINDOWEVENT_SIZE_CHANGED:
//case SDL_WINDOWEVENT_RESIZED:
return handleResizeEvent(event, ev.window.data1, ev.window.data2);
default:
return false;
}
case SDL_JOYDEVICEADDED:
return handleJoystickAdded(ev.jdevice);
case SDL_JOYDEVICEREMOVED:
return handleJoystickRemoved(ev.jdevice);
#else
case SDL_VIDEOEXPOSE:
if (_graphicsManager)
_graphicsManager->notifyVideoExpose();
return false;
case SDL_VIDEORESIZE:
return handleResizeEvent(event, ev.resize.w, ev.resize.h);
#endif
case SDL_QUIT:
event.type = Common::EVENT_QUIT;
return true;
}
if (_joystick) {
switch (ev.type) {
case SDL_JOYBUTTONDOWN:
return handleJoyButtonDown(ev, event);
case SDL_JOYBUTTONUP:
return handleJoyButtonUp(ev, event);
case SDL_JOYAXISMOTION:
return handleJoyAxisMotion(ev, event);
}
}
#if SDL_VERSION_ATLEAST(2, 0, 0)
if (_controller) {
switch (ev.type) {
case SDL_CONTROLLERBUTTONDOWN:
return handleControllerButton(ev, event, false);
case SDL_CONTROLLERBUTTONUP:
return handleControllerButton(ev, event, true);
case SDL_CONTROLLERAXISMOTION:
return handleControllerAxisMotion(ev, event);
}
}
#endif
return false;
}
bool SdlEventSource::handleKeyDown(SDL_Event &ev, Common::Event &event) {
SDLModToOSystemKeyFlags(SDL_GetModState(), event);
SDLKey sdlKeycode = obtainKeycode(ev.key.keysym);
// Handle scroll lock as a key modifier
if (sdlKeycode == SDLK_SCROLLOCK)
_scrollLock = !_scrollLock;
if (_scrollLock)
event.kbd.flags |= Common::KBD_SCRL;
// Ctrl-m toggles mouse capture
if (event.kbd.hasFlags(Common::KBD_CTRL) && sdlKeycode == 'm') {
if (_graphicsManager) {
_graphicsManager->getWindow()->toggleMouseGrab();
}
return false;
}
#if defined(MACOSX)
// On Macintosh, Cmd-Q quits
if ((ev.key.keysym.mod & KMOD_META) && sdlKeycode == 'q') {
event.type = Common::EVENT_QUIT;
return true;
}
#elif defined(POSIX)
// On other *nix systems, Control-Q quits
if ((ev.key.keysym.mod & KMOD_CTRL) && sdlKeycode == 'q') {
event.type = Common::EVENT_QUIT;
return true;
}
#else
// Ctrl-z quits
if ((event.kbd.hasFlags(Common::KBD_CTRL) && sdlKeycode == 'z')) {
event.type = Common::EVENT_QUIT;
return true;
}
#ifdef WIN32
// On Windows, also use the default Alt-F4 quit combination
if ((ev.key.keysym.mod & KMOD_ALT) && sdlKeycode == SDLK_F4) {
event.type = Common::EVENT_QUIT;
return true;
}
#endif
#endif
// Ctrl-u toggles mute
if ((ev.key.keysym.mod & KMOD_CTRL) && sdlKeycode == 'u') {
event.type = Common::EVENT_MUTE;
return true;
}
if (remapKey(ev, event))
return true;
event.type = Common::EVENT_KEYDOWN;
event.kbd.keycode = SDLToOSystemKeycode(sdlKeycode);
event.kbd.ascii = mapKey(sdlKeycode, (SDLMod)ev.key.keysym.mod, obtainUnicode(ev.key.keysym));
#if SDL_VERSION_ATLEAST(2, 0, 0)
event.kbdRepeat = ev.key.repeat;
#endif
return true;
}
bool SdlEventSource::handleKeyUp(SDL_Event &ev, Common::Event &event) {
if (remapKey(ev, event))
return true;
SDLKey sdlKeycode = obtainKeycode(ev.key.keysym);
SDLMod mod = SDL_GetModState();
// Check if this is an event handled by handleKeyDown(), and stop if it is
// Check if the Ctrl key is down, so that we can trap cases where the
// user has the Ctrl key down, and has just released a special key
if (mod & KMOD_CTRL) {
if (sdlKeycode == 'm' || // Ctrl-m toggles mouse capture
#if defined(MACOSX)
// Meta - Q, handled below
#elif defined(POSIX)
sdlKeycode == 'q' || // On other *nix systems, Control-Q quits
#else
sdlKeycode == 'z' || // Ctrl-z quit
#endif
sdlKeycode == 'u') // Ctrl-u toggles mute
return false;
}
// Same for other keys (Meta and Alt)
#if defined(MACOSX)
if ((mod & KMOD_META) && sdlKeycode == 'q')
return false; // On Macintosh, Cmd-Q quits
#endif
// If we reached here, this isn't an event handled by handleKeyDown(), thus
// continue normally
event.type = Common::EVENT_KEYUP;
event.kbd.keycode = SDLToOSystemKeycode(sdlKeycode);
event.kbd.ascii = mapKey(sdlKeycode, (SDLMod)ev.key.keysym.mod, 0);
// Ctrl-Alt-<key> will change the GFX mode
SDLModToOSystemKeyFlags(mod, event);
// Set the scroll lock sticky flag
if (_scrollLock)
event.kbd.flags |= Common::KBD_SCRL;
return true;
}
bool SdlEventSource::handleMouseMotion(SDL_Event &ev, Common::Event &event) {
event.type = Common::EVENT_MOUSEMOVE;
// update KbdMouse
_km.x = ev.motion.x * MULTIPLIER;
_km.y = ev.motion.y * MULTIPLIER;
return processMouseEvent(event, ev.motion.x, ev.motion.y);
}
bool SdlEventSource::handleMouseButtonDown(SDL_Event &ev, Common::Event &event) {
if (ev.button.button == SDL_BUTTON_LEFT)
event.type = Common::EVENT_LBUTTONDOWN;
else if (ev.button.button == SDL_BUTTON_RIGHT)
event.type = Common::EVENT_RBUTTONDOWN;
#if defined(SDL_BUTTON_WHEELUP) && defined(SDL_BUTTON_WHEELDOWN)
else if (ev.button.button == SDL_BUTTON_WHEELUP)
event.type = Common::EVENT_WHEELUP;
else if (ev.button.button == SDL_BUTTON_WHEELDOWN)
event.type = Common::EVENT_WHEELDOWN;
#endif
#if defined(SDL_BUTTON_MIDDLE)
else if (ev.button.button == SDL_BUTTON_MIDDLE)
event.type = Common::EVENT_MBUTTONDOWN;
#endif
else
return false;
// update KbdMouse
_km.x = ev.button.x * MULTIPLIER;
_km.y = ev.button.y * MULTIPLIER;
return processMouseEvent(event, ev.button.x, ev.button.y);
}
bool SdlEventSource::handleMouseButtonUp(SDL_Event &ev, Common::Event &event) {
if (ev.button.button == SDL_BUTTON_LEFT)
event.type = Common::EVENT_LBUTTONUP;
else if (ev.button.button == SDL_BUTTON_RIGHT)
event.type = Common::EVENT_RBUTTONUP;
#if defined(SDL_BUTTON_MIDDLE)
else if (ev.button.button == SDL_BUTTON_MIDDLE)
event.type = Common::EVENT_MBUTTONUP;
#endif
else
return false;
// update KbdMouse
_km.x = ev.button.x * MULTIPLIER;
_km.y = ev.button.y * MULTIPLIER;
return processMouseEvent(event, ev.button.x, ev.button.y);
}
void SdlEventSource::openJoystick(int joystickIndex) {
if (SDL_NumJoysticks() > joystickIndex) {
#if SDL_VERSION_ATLEAST(2, 0, 0)
if (SDL_IsGameController(joystickIndex)) {
_controller = SDL_GameControllerOpen(joystickIndex);
debug("Using game controller: %s", SDL_GameControllerName(_controller));
} else
#endif
{
_joystick = SDL_JoystickOpen(joystickIndex);
debug("Using joystick: %s",
#if SDL_VERSION_ATLEAST(2, 0, 0)
SDL_JoystickName(_joystick)
#else
SDL_JoystickName(joystickIndex)
#endif
);
}
} else {
warning("Invalid joystick: %d", joystickIndex);
}
}
void SdlEventSource::closeJoystick() {
#if SDL_VERSION_ATLEAST(2, 0, 0)
if (_controller) {
SDL_GameControllerClose(_controller);
_controller = nullptr;
}
#endif
if (_joystick) {
SDL_JoystickClose(_joystick);
_joystick = nullptr;
}
}
bool SdlEventSource::handleJoyButtonDown(SDL_Event &ev, Common::Event &event) {
if (ev.jbutton.button == JOY_BUT_LMOUSE) {
event.type = Common::EVENT_LBUTTONDOWN;
return processMouseEvent(event, _km.x / MULTIPLIER, _km.y / MULTIPLIER);
} else if (ev.jbutton.button == JOY_BUT_RMOUSE) {
event.type = Common::EVENT_RBUTTONDOWN;
return processMouseEvent(event, _km.x / MULTIPLIER, _km.y / MULTIPLIER);
} else {
event.type = Common::EVENT_KEYDOWN;
switch (ev.jbutton.button) {
case JOY_BUT_ESCAPE:
event.kbd.keycode = Common::KEYCODE_ESCAPE;
event.kbd.ascii = mapKey(SDLK_ESCAPE, (SDLMod)ev.key.keysym.mod, 0);
break;
case JOY_BUT_PERIOD:
event.kbd.keycode = Common::KEYCODE_PERIOD;
event.kbd.ascii = mapKey(SDLK_PERIOD, (SDLMod)ev.key.keysym.mod, 0);
break;
case JOY_BUT_SPACE:
event.kbd.keycode = Common::KEYCODE_SPACE;
event.kbd.ascii = mapKey(SDLK_SPACE, (SDLMod)ev.key.keysym.mod, 0);
break;
case JOY_BUT_F5:
event.kbd.keycode = Common::KEYCODE_F5;
event.kbd.ascii = mapKey(SDLK_F5, (SDLMod)ev.key.keysym.mod, 0);
break;
#ifdef ENABLE_VKEYBD
case JOY_BUT_VKEYBOARD: // Toggles virtual keyboard
event.type = Common::EVENT_VIRTUAL_KEYBOARD;
break;
#endif
}
return true;
}
}
bool SdlEventSource::handleJoyButtonUp(SDL_Event &ev, Common::Event &event) {
if (ev.jbutton.button == JOY_BUT_LMOUSE) {
event.type = Common::EVENT_LBUTTONUP;
return processMouseEvent(event, _km.x / MULTIPLIER, _km.y / MULTIPLIER);
} else if (ev.jbutton.button == JOY_BUT_RMOUSE) {
event.type = Common::EVENT_RBUTTONUP;
return processMouseEvent(event, _km.x / MULTIPLIER, _km.y / MULTIPLIER);
} else {
event.type = Common::EVENT_KEYUP;
switch (ev.jbutton.button) {
case JOY_BUT_ESCAPE:
event.kbd.keycode = Common::KEYCODE_ESCAPE;
event.kbd.ascii = mapKey(SDLK_ESCAPE, (SDLMod)ev.key.keysym.mod, 0);
break;
case JOY_BUT_PERIOD:
event.kbd.keycode = Common::KEYCODE_PERIOD;
event.kbd.ascii = mapKey(SDLK_PERIOD, (SDLMod)ev.key.keysym.mod, 0);
break;
case JOY_BUT_SPACE:
event.kbd.keycode = Common::KEYCODE_SPACE;
event.kbd.ascii = mapKey(SDLK_SPACE, (SDLMod)ev.key.keysym.mod, 0);
break;
case JOY_BUT_F5:
event.kbd.keycode = Common::KEYCODE_F5;
event.kbd.ascii = mapKey(SDLK_F5, (SDLMod)ev.key.keysym.mod, 0);
break;
#ifdef ENABLE_VKEYBD
case JOY_BUT_VKEYBOARD: // Toggles virtual keyboard
// Handled in key down
break;
#endif
}
return true;
}
}
bool SdlEventSource::handleJoyAxisMotion(SDL_Event &ev, Common::Event &event) {
if (ev.jaxis.axis == JOY_XAXIS) {
_km.joy_x = ev.jaxis.value;
return handleAxisToMouseMotion(_km.joy_x, _km.joy_y);
} else if (ev.jaxis.axis == JOY_YAXIS) {
_km.joy_y = ev.jaxis.value;
return handleAxisToMouseMotion(_km.joy_x, _km.joy_y);
}
return false;
}
#if SDL_VERSION_ATLEAST(2, 0, 0)
bool SdlEventSource::handleJoystickAdded(const SDL_JoyDeviceEvent &device) {
debug(5, "SdlEventSource: Received joystick added event for index '%d'", device.which);
int joystick_num = ConfMan.getInt("joystick_num");
if (joystick_num == device.which) {
debug(5, "SdlEventSource: Newly added joystick with index '%d' matches 'joysticky_num', trying to use it", device.which);
closeJoystick();
openJoystick(joystick_num);
}
return false;
}
bool SdlEventSource::handleJoystickRemoved(const SDL_JoyDeviceEvent &device) {
debug(5, "SdlEventSource: Received joystick removed event for instance id '%d'", device.which);
SDL_Joystick *joystick;
if (_controller) {
joystick = SDL_GameControllerGetJoystick(_controller);
} else {
joystick = _joystick;
}
if (!joystick) {
return false;
}
if (SDL_JoystickInstanceID(joystick) == device.which) {
debug(5, "SdlEventSource: Newly removed joystick with instance id '%d' matches currently used joystick, closing current joystick", device.which);
closeJoystick();
}
return false;
}
bool SdlEventSource::handleControllerButton(const SDL_Event &ev, Common::Event &event, bool buttonUp) {
using namespace Common;
struct ControllerEventMapping {
EventType normalType;
KeyState normalKeystate;
EventType modifierType;
KeyState modifierKeystate;
};
static const ControllerEventMapping mapping[] = {
// SDL_CONTROLLER_BUTTON_A: Left mouse button
{ EVENT_LBUTTONDOWN, KeyState(), EVENT_LBUTTONDOWN, KeyState() },
// SDL_CONTROLLER_BUTTON_B: Right mouse button
{ EVENT_RBUTTONDOWN, KeyState(), EVENT_RBUTTONDOWN, KeyState() },
// SDL_CONTROLLER_BUTTON_X: Period (+R_trigger: Space)
{ EVENT_KEYDOWN, KeyState(KEYCODE_PERIOD, '.'), EVENT_KEYDOWN, KeyState(KEYCODE_SPACE, ASCII_SPACE) },
// SDL_CONTROLLER_BUTTON_Y: Escape (+R_trigger: Return)
{ EVENT_KEYDOWN, KeyState(KEYCODE_ESCAPE, ASCII_ESCAPE), EVENT_KEYDOWN, KeyState(KEYCODE_RETURN, ASCII_RETURN) },
// SDL_CONTROLLER_BUTTON_BACK: Virtual keyboard (+R_trigger: Predictive Input Dialog)
#ifdef ENABLE_VKEYBD
{ EVENT_VIRTUAL_KEYBOARD, KeyState(), EVENT_PREDICTIVE_DIALOG, KeyState() },
#else
{ EVENT_INVALID, KeyState(), EVENT_PREDICTIVE_DIALOG, KeyState() },
#endif
// SDL_CONTROLLER_BUTTON_GUIDE: Unmapped
{ EVENT_INVALID, KeyState(), EVENT_INVALID, KeyState() },
// SDL_CONTROLLER_BUTTON_START: ScummVM in game menu
{ EVENT_MAINMENU, KeyState(), EVENT_MAINMENU, KeyState() },
// SDL_CONTROLLER_BUTTON_LEFTSTICK: Unmapped
{ EVENT_INVALID, KeyState(), EVENT_INVALID, KeyState() },
// SDL_CONTROLLER_BUTTON_RIGHTSTICK: Unmapped
{ EVENT_INVALID, KeyState(), EVENT_INVALID, KeyState() },
// SDL_CONTROLLER_BUTTON_LEFTSHOULDER: Game menu
{ EVENT_KEYDOWN, KeyState(KEYCODE_F5, ASCII_F5), EVENT_KEYDOWN, KeyState(KEYCODE_F5, ASCII_F5) },
// SDL_CONTROLLER_BUTTON_RIGHTSHOULDER: Modifier + Shift
{ EVENT_KEYDOWN, KeyState(KEYCODE_INVALID, 0, KBD_SHIFT), EVENT_KEYDOWN, KeyState(KEYCODE_INVALID, 0, 0) },
// SDL_CONTROLLER_BUTTON_DPAD_UP: Up (+R_trigger: Up+Right)
{ EVENT_KEYDOWN, KeyState(KEYCODE_KP8, 0), EVENT_KEYDOWN, KeyState(KEYCODE_KP9, 0) },
// SDL_CONTROLLER_BUTTON_DPAD_DOWN: Down (+R_trigger: Down+Left)
{ EVENT_KEYDOWN, KeyState(KEYCODE_KP2, 0), EVENT_KEYDOWN, KeyState(KEYCODE_KP1, 0) },
// SDL_CONTROLLER_BUTTON_DPAD_LEFT: Left (+R_trigger: Up+Left)
{ EVENT_KEYDOWN, KeyState(KEYCODE_KP4, 0), EVENT_KEYDOWN, KeyState(KEYCODE_KP7, 0) },
// SDL_CONTROLLER_BUTTON_DPAD_RIGHT: Right (+R_trigger: Down+Right)
{ EVENT_KEYDOWN, KeyState(KEYCODE_KP6, 0), EVENT_KEYDOWN, KeyState(KEYCODE_KP3, 0) }
};
if (ev.cbutton.button > SDL_CONTROLLER_BUTTON_DPAD_RIGHT) {
warning("Unknown SDL controller button: '%d'", ev.cbutton.button);
return false;
}
if (!_km.modifier) {
event.type = mapping[ev.cbutton.button].normalType;
event.kbd = mapping[ev.cbutton.button].normalKeystate;
} else {
event.type = mapping[ev.cbutton.button].modifierType;
event.kbd = mapping[ev.cbutton.button].modifierKeystate;
}
// Setting the mouse speed modifier after filling the event structure above
// ensures that the shift key events are correctly handled
if (ev.cbutton.button == SDL_CONTROLLER_BUTTON_RIGHTSHOULDER) {
// Right shoulder is the modifier button that makes the mouse go slower
// and allows access to an extended layout while pressed.
_km.modifier = !buttonUp;
}
if (event.type == EVENT_LBUTTONDOWN || event.type == EVENT_RBUTTONDOWN) {
processMouseEvent(event, _km.x / MULTIPLIER, _km.y / MULTIPLIER);
}
if (buttonUp) {
// The event mapping table is for button down events. If we received a button up event,
// transform the event type to the corresponding up type.
if (event.type == EVENT_KEYDOWN) {
event.type = EVENT_KEYUP;
} else if (event.type == EVENT_LBUTTONDOWN) {
event.type = EVENT_LBUTTONUP;
} else if (event.type == EVENT_RBUTTONDOWN) {
event.type = EVENT_RBUTTONUP;
} else {
// Handled in key down
event.type = EVENT_INVALID;
}
}
return event.type != EVENT_INVALID;
}
bool SdlEventSource::handleControllerAxisMotion(const SDL_Event &ev, Common::Event &event) {
if (ev.caxis.axis == SDL_CONTROLLER_AXIS_LEFTX) {
_km.joy_x = ev.caxis.value;
return handleAxisToMouseMotion(_km.joy_x, _km.joy_y);
} else if (ev.caxis.axis == SDL_CONTROLLER_AXIS_LEFTY) {
_km.joy_y = ev.caxis.value;
return handleAxisToMouseMotion(_km.joy_x, _km.joy_y);
}
return false;
}
#endif
bool SdlEventSource::handleAxisToMouseMotion(int16 xAxis, int16 yAxis) {
#ifdef JOY_INVERT_Y
yAxis = -yAxis;
#endif
// conversion factor between keyboard mouse and joy axis value
int vel_to_axis = (1500 / MULTIPLIER);
// radial and scaled deadzone
float analogX = (float)xAxis;
float analogY = (float)yAxis;
float deadZone = (float)ConfMan.getInt("joystick_deadzone") * 1000.0f;
float magnitude = sqrt(analogX * analogX + analogY * analogY);
if (magnitude >= deadZone) {
_km.x_down_count = 0;
_km.y_down_count = 0;
float scalingFactor = 1.0f / magnitude * (magnitude - deadZone) / (32769.0f - deadZone);
_km.x_vel = (int16)(analogX * scalingFactor * 32768.0f / vel_to_axis);
_km.y_vel = (int16)(analogY * scalingFactor * 32768.0f / vel_to_axis);
} else {
_km.x_vel = 0;
_km.y_vel = 0;
}
return false;
}
bool SdlEventSource::remapKey(SDL_Event &ev, Common::Event &event) {
return false;
}
void SdlEventSource::resetKeyboardEmulation(int16 x_max, int16 y_max) {
_km.x_max = x_max;
_km.y_max = y_max;
_km.delay_time = 12;
_km.last_time = 0;
_km.modifier = false;
_km.joy_x = 0;
_km.joy_y = 0;
}
void SdlEventSource::fakeWarpMouse(const int x, const int y) {
_queuedFakeMouseMove = true;
_fakeMouseMove.type = Common::EVENT_MOUSEMOVE;
_fakeMouseMove.mouse = Common::Point(x, y);
}
bool SdlEventSource::handleResizeEvent(Common::Event &event, int w, int h) {
if (_graphicsManager) {
_graphicsManager->notifyResize(w, h);
// If the screen changed, send an Common::EVENT_SCREEN_CHANGED
int screenID = ((OSystem_SDL *)g_system)->getGraphicsManager()->getScreenChangeID();
if (screenID != _lastScreenID) {
_lastScreenID = screenID;
event.type = Common::EVENT_SCREEN_CHANGED;
return true;
}
}
return false;
}
SDLKey SdlEventSource::obtainKeycode(const SDL_keysym keySym) {
#if !SDL_VERSION_ATLEAST(2, 0, 0) && defined(WIN32) && !defined(_WIN32_WCE)
// WORKAROUND: SDL 1.2 on Windows does not use the user configured keyboard layout,
// resulting in "keySym.sym" values to always be those expected for an US keyboard.
// For example, SDL returns SDLK_Q when pressing the 'A' key on an AZERTY keyboard.
// This defeats the purpose of keycodes which is to be able to refer to a key without
// knowing where it is physically located.
// We work around this issue by querying the currently active Windows keyboard layout
// using the scancode provided by SDL.
if (keySym.sym >= SDLK_0 && keySym.sym <= SDLK_9) {
// The keycode returned by SDL is kept for the number keys.
// Querying the keyboard layout for those would return the base key values
// for AZERTY keyboards, which are not numbers. For example, SDLK_1 would
// map to SDLK_AMPERSAND. This is theoretically correct but practically unhelpful,
// because it makes it impossible to handle key combinations such as "ctrl-1".
return keySym.sym;
}
int vk = MapVirtualKey(keySym.scancode, MAPVK_VSC_TO_VK);
if (vk) {
int ch = (MapVirtualKey(vk, MAPVK_VK_TO_CHAR) & 0x7FFF);
// The top bit of the result of MapVirtualKey with MAPVK_VSC_TO_VK signals
// a dead key was pressed. In that case we keep the value of the accent alone.
if (ch) {
if (ch >= 'A' && ch <= 'Z') {
// Windows returns uppercase ASCII whereas SDL expects lowercase
return (SDLKey)(SDLK_a + (ch - 'A'));
} else {
return (SDLKey)ch;
}
}
}
#endif
return keySym.sym;
}
uint32 SdlEventSource::obtainUnicode(const SDL_keysym keySym) {
#if SDL_VERSION_ATLEAST(2, 0, 0)
SDL_Event events[2];
// Update the event queue here to give SDL a chance to insert TEXTINPUT
// events for KEYDOWN events. Otherwise we have a high chance that on
// Windows the TEXTINPUT event is not in the event queue at this point.
// In this case we will get two events with ascii values due to mapKey
// and dispatchSDLEvent. This results in nasty double input of characters
// in the GUI.
//
// FIXME: This is all a bit fragile because in mapKey we derive the ascii
// value from the key code if no unicode value is given. This is legacy
// behavior and should be removed anyway. If that is removed, we might not
// even need to do this peeking here but instead can rely on the
// SDL_TEXTINPUT case in dispatchSDLEvent to introduce keydown/keyup with
// proper ASCII values (but with KEYCODE_INVALID as keycode).
SDL_PumpEvents();
// In SDL2, the unicode field has been removed from the keysym struct.
// Instead a SDL_TEXTINPUT event is generated on key combinations that
// generates unicode.
// Here we peek into the event queue for the event to see if it exists.
int n = SDL_PeepEvents(events, 2, SDL_PEEKEVENT, SDL_KEYDOWN, SDL_TEXTINPUT);
// Make sure that the TEXTINPUT event belongs to this KEYDOWN
// event and not another pending one.
if ((n > 0 && events[0].type == SDL_TEXTINPUT)
|| (n > 1 && events[0].type != SDL_KEYDOWN && events[1].type == SDL_TEXTINPUT)) {
// Remove the text input event we associate with the key press. This
// makes sure we never get any SDL_TEXTINPUT events which do "belong"
// to SDL_KEYDOWN events.
n = SDL_PeepEvents(events, 1, SDL_GETEVENT, SDL_TEXTINPUT, SDL_TEXTINPUT);
// This is basically a paranoia safety check because we know there
// must be a text input event in the queue.
if (n > 0) {
return convUTF8ToUTF32(events[0].text.text);
} else {
return 0;
}
} else {
return 0;
}
#else
return keySym.unicode;
#endif
}
#endif
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