src/video/windib/SDL_dibevents.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 29 Jan 2006 07:57:13 +0000
changeset 1282 217f5d5a49e5
parent 1280 f61f045343d3
child 1288 ea3888b472bf
permissions -rw-r--r--
Date: Sat, 15 Jan 2005 02:01:51 +0000 (UTC) From: jimrandomh Subject: [SDL] Re: Modifier keys pressed during initialization stick I wrote a simple test program which initializes SDL, prints the SDL version number, then prints any keydown and keyup events with their modifiers. (Source code below). Compilation was done using Visual Studio 6, release mode. My test sequence was: Start a command prompt. Type the name of the test program. shift down enter down (program starts) Wait for window to appear enter up shift up spacebar down spacebar up Under Windows 98, the output was correct: SDL 1.2.8 left shift down shift-return down shift-return up left shift up space down space up Under Windows 2000 and under Windows XP, the output was: SDL 1.2.8 shift-space down shift-space up Since shift was not held at the time space was pressed, this is incorrect. Similar results were observed with launching in different ways (including double-clicking in Windows Explorer), so it does not depend on the launching terminal.

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

#include <stdlib.h>
#include <stdio.h>
#include <windows.h>

#include "SDL_events.h"
#include "SDL_error.h"
#include "SDL_syswm.h"
#include "SDL_sysevents.h"
#include "SDL_events_c.h"
#include "SDL_lowvideo.h"
#include "SDL_dibvideo.h"
#include "SDL_vkeys.h"

#ifndef WM_APP
#define WM_APP	0x8000
#endif

#ifdef _WIN32_WCE
#define NO_GETKEYBOARDSTATE
#endif

/* The translation table from a Microsoft VK keysym to a SDL keysym */
static SDLKey VK_keymap[SDLK_LAST];
static SDL_keysym *TranslateKey(UINT vkey, UINT scancode, SDL_keysym *keysym, int pressed);

/* Masks for processing the windows KEYDOWN and KEYUP messages */
#define REPEATED_KEYMASK	(1<<30)
#define EXTENDED_KEYMASK	(1<<24)

/* DJM: If the user setup the window for us, we want to save his window proc,
   and give him a chance to handle some messages. */
static WNDPROC userWindowProc = NULL;


#ifdef _WIN32_WCE

WPARAM rotateKey(WPARAM key,SDL_ScreenOrientation direction) 
{
	if (direction != SDL_ORIENTATION_LEFT)
		return key;

	switch (key) {
		case 0x26: /* up */
			return 0x27;
		case 0x27: /* right */
			return 0x28;
		case 0x28: /* down */
			return 0x25;
		case 0x25: /* left */
			return 0x26;
	}

	return key;
}

#endif 


/* The main Win32 event handler */
LONG
 DIB_HandleMessage(_THIS, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	extern int posted;

	switch (msg) {
		case WM_SYSKEYDOWN:
		case WM_KEYDOWN: {
			SDL_keysym keysym;

#ifdef _WIN32_WCE
			// Drop GAPI artefacts
			if (wParam == 0x84 || wParam == 0x5B)
				return 0;

			// Rotate key if necessary
			if (this->hidden->orientation != SDL_ORIENTATION_UP)
				wParam = rotateKey(wParam, this->hidden->orientation);	
#endif 
			/* Ignore repeated keys */
			if ( lParam&REPEATED_KEYMASK ) {
				return(0);
			}
			switch (wParam) {
				case VK_CONTROL:
					if ( lParam&EXTENDED_KEYMASK )
						wParam = VK_RCONTROL;
					else
						wParam = VK_LCONTROL;
					break;
				case VK_SHIFT:
					/* EXTENDED trick doesn't work here */
					{
					Uint8 *state = SDL_GetKeyState(NULL);
					if (state[SDLK_LSHIFT] == SDL_RELEASED && (GetKeyState(VK_LSHIFT) & 0x8000)) {
						wParam = VK_LSHIFT;
					} else if (state[SDLK_RSHIFT] == SDL_RELEASED && (GetKeyState(VK_RSHIFT) & 0x8000)) {
						wParam = VK_RSHIFT;
					} else {
						/* Probably a key repeat */
						return(0);
					}
					}
					break;
				case VK_MENU:
					if ( lParam&EXTENDED_KEYMASK )
						wParam = VK_RMENU;
					else
						wParam = VK_LMENU;
					break;
			}
#ifdef NO_GETKEYBOARDSTATE
			/* this is the workaround for the missing ToAscii() and ToUnicode() in CE (not necessary at KEYUP!) */
			if ( SDL_TranslateUNICODE ) {
				MSG m;

				m.hwnd = hwnd;
				m.message = msg;
				m.wParam = wParam;
				m.lParam = lParam;
				m.time = 0;
				if ( TranslateMessage(&m) && PeekMessage(&m, hwnd, 0, WM_USER, PM_NOREMOVE) && (m.message == WM_CHAR) ) {
					GetMessage(&m, hwnd, 0, WM_USER);
			    		wParam = m.wParam;
				}
			}
#endif /* NO_GETKEYBOARDSTATE */
			posted = SDL_PrivateKeyboard(SDL_PRESSED,
				TranslateKey(wParam,HIWORD(lParam),&keysym,1));
		}
		return(0);

		case WM_SYSKEYUP:
		case WM_KEYUP: {
			SDL_keysym keysym;

#ifdef _WIN32_WCE
			// Drop GAPI artefacts
			if (wParam == 0x84 || wParam == 0x5B)
				return 0;

			// Rotate key if necessary
			if (this->hidden->orientation != SDL_ORIENTATION_UP)
				wParam = rotateKey(wParam, this->hidden->orientation);	
#endif

			switch (wParam) {
				case VK_CONTROL:
					if ( lParam&EXTENDED_KEYMASK )
						wParam = VK_RCONTROL;
					else
						wParam = VK_LCONTROL;
					break;
				case VK_SHIFT:
					/* EXTENDED trick doesn't work here */
					{
					Uint8 *state = SDL_GetKeyState(NULL);
					if (state[SDLK_LSHIFT] == SDL_PRESSED && !(GetKeyState(VK_LSHIFT) & 0x8000)) {
						wParam = VK_LSHIFT;
					} else if (state[SDLK_RSHIFT] == SDL_PRESSED && !(GetKeyState(VK_RSHIFT) & 0x8000)) {
						wParam = VK_RSHIFT;
					} else {
						/* Probably a key repeat */
						return(0);
					}
					}
					break;
				case VK_MENU:
					if ( lParam&EXTENDED_KEYMASK )
						wParam = VK_RMENU;
					else
						wParam = VK_LMENU;
					break;
			}
			posted = SDL_PrivateKeyboard(SDL_RELEASED,
				TranslateKey(wParam,HIWORD(lParam),&keysym,0));
		}
		return(0);

#if defined(SC_SCREENSAVE) && defined(SC_MONITORPOWER)
		case WM_SYSCOMMAND: {
			if ((wParam&0xFFF0)==SC_SCREENSAVE ||
				(wParam&0xFFF0)==SC_MONITORPOWER)
					return(0);
		}
		/* Fall through to default processing */
#endif /* SC_SCREENSAVE && SC_MONITORPOWER */

		default: {
			/* Only post the event if we're watching for it */
			if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) {
			        SDL_SysWMmsg wmmsg;

				SDL_VERSION(&wmmsg.version);
				wmmsg.hwnd = hwnd;
				wmmsg.msg = msg;
				wmmsg.wParam = wParam;
				wmmsg.lParam = lParam;
				posted = SDL_PrivateSysWMEvent(&wmmsg);

			/* DJM: If the user isn't watching for private
				messages in her SDL event loop, then pass it
				along to any win32 specific window proc.
			 */
			} else if (userWindowProc) {
				return CallWindowProc(userWindowProc, hwnd, msg, wParam, lParam);
			}
		}
		break;
	}
	return(DefWindowProc(hwnd, msg, wParam, lParam));
}

void DIB_PumpEvents(_THIS)
{
	MSG msg;

	while ( PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) ) {
		if ( GetMessage(&msg, NULL, 0, 0) > 0 ) {
			DispatchMessage(&msg);
		}
	}
}

void DIB_InitOSKeymap(_THIS)
{
	int i;

	/* Map the VK keysyms */
	for ( i=0; i<SDL_TABLESIZE(VK_keymap); ++i )
		VK_keymap[i] = SDLK_UNKNOWN;

	VK_keymap[VK_BACK] = SDLK_BACKSPACE;
	VK_keymap[VK_TAB] = SDLK_TAB;
	VK_keymap[VK_CLEAR] = SDLK_CLEAR;
	VK_keymap[VK_RETURN] = SDLK_RETURN;
	VK_keymap[VK_PAUSE] = SDLK_PAUSE;
	VK_keymap[VK_ESCAPE] = SDLK_ESCAPE;
	VK_keymap[VK_SPACE] = SDLK_SPACE;
	VK_keymap[VK_APOSTROPHE] = SDLK_QUOTE;
	VK_keymap[VK_COMMA] = SDLK_COMMA;
	VK_keymap[VK_MINUS] = SDLK_MINUS;
	VK_keymap[VK_PERIOD] = SDLK_PERIOD;
	VK_keymap[VK_SLASH] = SDLK_SLASH;
	VK_keymap[VK_0] = SDLK_0;
	VK_keymap[VK_1] = SDLK_1;
	VK_keymap[VK_2] = SDLK_2;
	VK_keymap[VK_3] = SDLK_3;
	VK_keymap[VK_4] = SDLK_4;
	VK_keymap[VK_5] = SDLK_5;
	VK_keymap[VK_6] = SDLK_6;
	VK_keymap[VK_7] = SDLK_7;
	VK_keymap[VK_8] = SDLK_8;
	VK_keymap[VK_9] = SDLK_9;
	VK_keymap[VK_SEMICOLON] = SDLK_SEMICOLON;
	VK_keymap[VK_EQUALS] = SDLK_EQUALS;
	VK_keymap[VK_LBRACKET] = SDLK_LEFTBRACKET;
	VK_keymap[VK_BACKSLASH] = SDLK_BACKSLASH;
	VK_keymap[VK_OEM_102] = SDLK_LESS;
	VK_keymap[VK_RBRACKET] = SDLK_RIGHTBRACKET;
	VK_keymap[VK_GRAVE] = SDLK_BACKQUOTE;
	VK_keymap[VK_BACKTICK] = SDLK_BACKQUOTE;
	VK_keymap[VK_A] = SDLK_a;
	VK_keymap[VK_B] = SDLK_b;
	VK_keymap[VK_C] = SDLK_c;
	VK_keymap[VK_D] = SDLK_d;
	VK_keymap[VK_E] = SDLK_e;
	VK_keymap[VK_F] = SDLK_f;
	VK_keymap[VK_G] = SDLK_g;
	VK_keymap[VK_H] = SDLK_h;
	VK_keymap[VK_I] = SDLK_i;
	VK_keymap[VK_J] = SDLK_j;
	VK_keymap[VK_K] = SDLK_k;
	VK_keymap[VK_L] = SDLK_l;
	VK_keymap[VK_M] = SDLK_m;
	VK_keymap[VK_N] = SDLK_n;
	VK_keymap[VK_O] = SDLK_o;
	VK_keymap[VK_P] = SDLK_p;
	VK_keymap[VK_Q] = SDLK_q;
	VK_keymap[VK_R] = SDLK_r;
	VK_keymap[VK_S] = SDLK_s;
	VK_keymap[VK_T] = SDLK_t;
	VK_keymap[VK_U] = SDLK_u;
	VK_keymap[VK_V] = SDLK_v;
	VK_keymap[VK_W] = SDLK_w;
	VK_keymap[VK_X] = SDLK_x;
	VK_keymap[VK_Y] = SDLK_y;
	VK_keymap[VK_Z] = SDLK_z;
	VK_keymap[VK_DELETE] = SDLK_DELETE;

	VK_keymap[VK_NUMPAD0] = SDLK_KP0;
	VK_keymap[VK_NUMPAD1] = SDLK_KP1;
	VK_keymap[VK_NUMPAD2] = SDLK_KP2;
	VK_keymap[VK_NUMPAD3] = SDLK_KP3;
	VK_keymap[VK_NUMPAD4] = SDLK_KP4;
	VK_keymap[VK_NUMPAD5] = SDLK_KP5;
	VK_keymap[VK_NUMPAD6] = SDLK_KP6;
	VK_keymap[VK_NUMPAD7] = SDLK_KP7;
	VK_keymap[VK_NUMPAD8] = SDLK_KP8;
	VK_keymap[VK_NUMPAD9] = SDLK_KP9;
	VK_keymap[VK_DECIMAL] = SDLK_KP_PERIOD;
	VK_keymap[VK_DIVIDE] = SDLK_KP_DIVIDE;
	VK_keymap[VK_MULTIPLY] = SDLK_KP_MULTIPLY;
	VK_keymap[VK_SUBTRACT] = SDLK_KP_MINUS;
	VK_keymap[VK_ADD] = SDLK_KP_PLUS;

	VK_keymap[VK_UP] = SDLK_UP;
	VK_keymap[VK_DOWN] = SDLK_DOWN;
	VK_keymap[VK_RIGHT] = SDLK_RIGHT;
	VK_keymap[VK_LEFT] = SDLK_LEFT;
	VK_keymap[VK_INSERT] = SDLK_INSERT;
	VK_keymap[VK_HOME] = SDLK_HOME;
	VK_keymap[VK_END] = SDLK_END;
	VK_keymap[VK_PRIOR] = SDLK_PAGEUP;
	VK_keymap[VK_NEXT] = SDLK_PAGEDOWN;

	VK_keymap[VK_F1] = SDLK_F1;
	VK_keymap[VK_F2] = SDLK_F2;
	VK_keymap[VK_F3] = SDLK_F3;
	VK_keymap[VK_F4] = SDLK_F4;
	VK_keymap[VK_F5] = SDLK_F5;
	VK_keymap[VK_F6] = SDLK_F6;
	VK_keymap[VK_F7] = SDLK_F7;
	VK_keymap[VK_F8] = SDLK_F8;
	VK_keymap[VK_F9] = SDLK_F9;
	VK_keymap[VK_F10] = SDLK_F10;
	VK_keymap[VK_F11] = SDLK_F11;
	VK_keymap[VK_F12] = SDLK_F12;
	VK_keymap[VK_F13] = SDLK_F13;
	VK_keymap[VK_F14] = SDLK_F14;
	VK_keymap[VK_F15] = SDLK_F15;

	VK_keymap[VK_NUMLOCK] = SDLK_NUMLOCK;
	VK_keymap[VK_CAPITAL] = SDLK_CAPSLOCK;
	VK_keymap[VK_SCROLL] = SDLK_SCROLLOCK;
	VK_keymap[VK_RSHIFT] = SDLK_RSHIFT;
	VK_keymap[VK_LSHIFT] = SDLK_LSHIFT;
	VK_keymap[VK_RCONTROL] = SDLK_RCTRL;
	VK_keymap[VK_LCONTROL] = SDLK_LCTRL;
	VK_keymap[VK_RMENU] = SDLK_RALT;
	VK_keymap[VK_LMENU] = SDLK_LALT;
	VK_keymap[VK_RWIN] = SDLK_RSUPER;
	VK_keymap[VK_LWIN] = SDLK_LSUPER;

	VK_keymap[VK_HELP] = SDLK_HELP;
#ifdef VK_PRINT
	VK_keymap[VK_PRINT] = SDLK_PRINT;
#endif
	VK_keymap[VK_SNAPSHOT] = SDLK_PRINT;
	VK_keymap[VK_CANCEL] = SDLK_BREAK;
	VK_keymap[VK_APPS] = SDLK_MENU;
}

static SDL_keysym *TranslateKey(UINT vkey, UINT scancode, SDL_keysym *keysym, int pressed)
{
	/* Set the keysym information */
	keysym->scancode = (unsigned char) scancode;
	keysym->sym = VK_keymap[vkey];
	keysym->mod = KMOD_NONE;
	keysym->unicode = 0;
	if ( pressed && SDL_TranslateUNICODE ) {
#ifdef NO_GETKEYBOARDSTATE
		/* Uh oh, better hope the vkey is close enough.. */
		keysym->unicode = vkey;
#else
		BYTE	keystate[256];
		Uint16	wchars[2];

		GetKeyboardState(keystate);
		if (SDL_ToUnicode(vkey, scancode, keystate, wchars, sizeof(wchars)/sizeof(wchars[0]), 0) == 1)
		{
			keysym->unicode = wchars[0];
		}
#endif /* NO_GETKEYBOARDSTATE */
	}
	return(keysym);
}

int DIB_CreateWindow(_THIS)
{
	char *windowid = getenv("SDL_WINDOWID");

#ifndef CS_BYTEALIGNCLIENT
#define CS_BYTEALIGNCLIENT	0
#endif
	SDL_RegisterApp("SDL_app", CS_BYTEALIGNCLIENT, 0);

	SDL_windowid = (windowid != NULL);
	if ( SDL_windowid ) {
#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
		/* wince 2.1 does not have strtol */
		wchar_t *windowid_t = malloc((strlen(windowid) + 1) * sizeof(wchar_t));
		MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, windowid, -1, windowid_t, strlen(windowid) + 1);
		SDL_Window = (HWND)wcstol(windowid_t, NULL, 0);
		free(windowid_t);
#else
		SDL_Window = (HWND)strtol(windowid, NULL, 0);
#endif
		if ( SDL_Window == NULL ) {
			SDL_SetError("Couldn't get user specified window");
			return(-1);
		}

		/* DJM: we want all event's for the user specified
			window to be handled by SDL.
		 */
		userWindowProc = (WNDPROC)GetWindowLong(SDL_Window, GWL_WNDPROC);
		SetWindowLong(SDL_Window, GWL_WNDPROC, (LONG)WinMessage);
	} else {
		SDL_Window = CreateWindow(SDL_Appname, SDL_Appname,
                        (WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX),
                        CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, NULL, NULL, SDL_Instance, NULL);
		if ( SDL_Window == NULL ) {
			SDL_SetError("Couldn't create window");
			return(-1);
		}
		ShowWindow(SDL_Window, SW_HIDE);
	}
	return(0);
}

void DIB_DestroyWindow(_THIS)
{
	if ( SDL_windowid ) {
		SetWindowLong(SDL_Window, GWL_WNDPROC, (LONG)userWindowProc);
	} else {
		DestroyWindow(SDL_Window);
	}
}