This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
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SDL_win32events.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
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#if (_WIN32_WINNT < 0x0501)
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0501
#endif
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#include "SDL_config.h"
#include "SDL_win32video.h"
#include "SDL_syswm.h"
#include "SDL_vkeys.h"
#include "../../events/SDL_events_c.h"
/*#define WMMSG_DEBUG*/
#ifdef WMMSG_DEBUG
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#include <stdio.h>
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#include "wmmsg.h"
#endif
/* Masks for processing the windows KEYDOWN and KEYUP messages */
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#define REPEATED_KEYMASK (1<<30)
#define EXTENDED_KEYMASK (1<<24)
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#define VK_ENTER 10 /* Keypad Enter ... no VKEY defined? */
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/* Make sure XBUTTON stuff is defined that isn't in older Platform SDKs... */
#ifndef WM_XBUTTONDOWN
#define WM_XBUTTONDOWN 0x020B
#endif
#ifndef WM_XBUTTONUP
#define WM_XBUTTONUP 0x020C
#endif
#ifndef GET_XBUTTON_WPARAM
#define GET_XBUTTON_WPARAM(w) (HIWORD(w))
#endif
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#ifndef WM_INPUT
#define WM_INPUT 0x00ff
#endif
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extern HCTX *g_hCtx;
extern HANDLE *mice;
extern int total_mice;
extern int tablet;
int pressure = 0; /* the pressure reported by the tablet */
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static WPARAM
RemapVKEY(WPARAM wParam, LPARAM lParam)
{
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int i;
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BYTE scancode = (BYTE) ((lParam >> 16) & 0xFF);
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/* Windows remaps alphabetic keys based on current layout.
We try to provide USB scancodes, so undo this mapping.
*/
if (wParam >= 'A' && wParam <= 'Z') {
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if (scancode != alpha_scancodes[wParam - 'A']) {
for (i = 0; i < SDL_arraysize(alpha_scancodes); ++i) {
if (scancode == alpha_scancodes[i]) {
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wParam = 'A' + i;
break;
}
}
}
}
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/* Keypad keys are a little trickier, we always scan for them. */
for (i = 0; i < SDL_arraysize(keypad_scancodes); ++i) {
if (scancode == keypad_scancodes[i]) {
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wParam = VK_NUMPAD0 + i;
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break;
}
}
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return wParam;
}
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LRESULT CALLBACK
WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
SDL_WindowData *data;
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RAWINPUT *raw;
PACKET packet;
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/* Send a SDL_SYSWMEVENT if the application wants them */
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;
SDL_SendSysWMEvent(&wmmsg);
}
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/* Get the window data for the window */
data = (SDL_WindowData *) GetProp(hwnd, TEXT("SDL_WindowData"));
if (!data) {
return CallWindowProc(DefWindowProc, hwnd, msg, wParam, lParam);
}
#ifdef WMMSG_DEBUG
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{
FILE *log = fopen("wmmsg.txt", "a");
fprintf(log, "Received windows message: %p ", hwnd);
if (msg > MAX_WMMSG) {
fprintf(log, "%d", msg);
} else {
fprintf(log, "%s", wmtab[msg]);
}
fprintf(log, " -- 0x%X, 0x%X\n", wParam, lParam);
fclose(log);
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}
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#endif
switch (msg) {
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case WT_PACKET:
{
/* if we receive such data we need to update the pressure */
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SDL_VideoData *videodata = data->videodata;
if (videodata->wintabDLL
&& videodata->WTPacket((HCTX) lParam, wParam, &packet)) {
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SDL_ChangeEnd(tablet, (int) packet.pkCursor);
pressure = (int) packet.pkNormalPressure;
}
}
break;
case WT_PROXIMITY:
{
/* checking where the proximity message showed up */
int h_context = LOWORD(lParam);
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POINT point;
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GetCursorPos(&point);
ScreenToClient(hwnd, &point);
/* are we in proximity or out of proximity */
if (h_context == 0) {
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SDL_SendProximity(tablet, point.x, point.y, SDL_PROXIMITYOUT);
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} else {
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SDL_SendProximity(tablet, point.x, point.y, SDL_PROXIMITYIN);
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}
}
break;
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case WM_SHOWWINDOW:
{
if (wParam) {
SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_SHOWN, 0,
0);
} else {
SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_HIDDEN, 0,
0);
}
}
break;
case WM_ACTIVATE:
{
int index;
SDL_Keyboard *keyboard;
BOOL minimized;
minimized = HIWORD(wParam);
index = data->videodata->keyboard;
keyboard = SDL_GetKeyboard(index);
if (!minimized && (LOWORD(wParam) != WA_INACTIVE)) {
SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_SHOWN,
0, 0);
SDL_SendWindowEvent(data->windowID,
SDL_WINDOWEVENT_RESTORED, 0, 0);
if (IsZoomed(hwnd)) {
SDL_SendWindowEvent(data->windowID,
SDL_WINDOWEVENT_MAXIMIZED, 0, 0);
}
if (keyboard && keyboard->focus != data->windowID) {
SDL_SetKeyboardFocus(index, data->windowID);
}
/* FIXME: Update keyboard state */
} else {
if (keyboard && keyboard->focus == data->windowID) {
SDL_SetKeyboardFocus(index, 0);
}
if (minimized) {
SDL_SendWindowEvent(data->windowID,
SDL_WINDOWEVENT_MINIMIZED, 0, 0);
}
}
}
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return (0);
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case WM_INPUT: /* mouse events */
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{
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LPBYTE lpb;
int w, h;
const RAWINPUTHEADER *header;
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int index;
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int i;
int size = 0;
const RAWMOUSE *raw_mouse = NULL;
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POINT point;
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USHORT flags;
/* we're collecting data from the mouse */
GetRawInputData((HRAWINPUT) lParam, RID_INPUT, NULL, &size,
sizeof(RAWINPUTHEADER));
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lpb = SDL_stack_alloc(BYTE, size);
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GetRawInputData((HRAWINPUT) lParam, RID_INPUT, lpb, &size,
sizeof(RAWINPUTHEADER));
raw = (RAWINPUT *) lpb;
header = &raw->header;
flags = raw->data.mouse.usButtonFlags;
/* we're checking which mouse generated the event */
for (i = 0; i < total_mice; ++i) {
if (mice[i] == header->hDevice) {
index = i;
break;
}
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}
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GetCursorPos(&point);
ScreenToClient(hwnd, &point);
SDL_GetWindowSize(data->windowID, &w, &h);
SDL_UpdateCoordinates(w, h); /* we're updating the current window size */
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/* if the message was sent by a tablet we have to send also pressure */
if (i == tablet) {
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SDL_SendMouseMotion(index, 0, point.x, point.y, pressure);
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} else {
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SDL_SendMouseMotion(index, 0, point.x, point.y, 0);
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}
/* we're sending mouse buttons messages to check up if sth changed */
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if (flags & RI_MOUSE_LEFT_BUTTON_DOWN) {
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SDL_SendMouseButton(index, SDL_PRESSED, SDL_BUTTON_LEFT);
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} else if (flags & RI_MOUSE_LEFT_BUTTON_UP) {
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SDL_SendMouseButton(index, SDL_RELEASED, SDL_BUTTON_LEFT);
}
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if (flags & RI_MOUSE_MIDDLE_BUTTON_DOWN) {
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SDL_SendMouseButton(index, SDL_PRESSED, SDL_BUTTON_MIDDLE);
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} else if (flags & RI_MOUSE_MIDDLE_BUTTON_UP) {
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SDL_SendMouseButton(index, SDL_RELEASED, SDL_BUTTON_MIDDLE);
}
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if (flags & RI_MOUSE_RIGHT_BUTTON_DOWN) {
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SDL_SendMouseButton(index, SDL_PRESSED, SDL_BUTTON_RIGHT);
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} else if (flags & RI_MOUSE_RIGHT_BUTTON_UP) {
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SDL_SendMouseButton(index, SDL_RELEASED, SDL_BUTTON_RIGHT);
}
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if (flags & RI_MOUSE_BUTTON_4_DOWN) {
SDL_SendMouseButton(index, SDL_PRESSED, SDL_BUTTON_X1);
} else if (flags & RI_MOUSE_BUTTON_4_UP) {
SDL_SendMouseButton(index, SDL_RELEASED, SDL_BUTTON_X1);
}
if (flags & RI_MOUSE_BUTTON_5_DOWN) {
SDL_SendMouseButton(index, SDL_PRESSED, SDL_BUTTON_X2);
} else if (flags & RI_MOUSE_BUTTON_5_UP) {
SDL_SendMouseButton(index, SDL_RELEASED, SDL_BUTTON_X2);
}
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if (flags & RI_MOUSE_WHEEL) {
if (raw->data.mouse.usButtonData != 0) {
SDL_SendMouseWheel(index, 0,
raw->data.mouse.usButtonData);
}
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}
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SDL_stack_free(lpb);
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}
return (0);
case WM_MOUSELEAVE:
{
int index;
SDL_Mouse *mouse;
index = data->videodata->mouse;
mouse = SDL_GetMouse(index);
if (mouse->focus == data->windowID) {
SDL_SetMouseFocus(index, 0);
}
}
return (0);
case WM_SYSKEYDOWN:
case WM_KEYDOWN:
{
int index;
/* Ignore repeated keys */
if (lParam & REPEATED_KEYMASK) {
return (0);
}
index = data->videodata->keyboard;
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wParam = RemapVKEY(wParam, lParam);
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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 */
{
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Uint8 *state = SDL_GetKeyboardState(NULL);
if (state[SDL_SCANCODE_LSHIFT] == SDL_RELEASED
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&& (GetKeyState(VK_LSHIFT) & 0x8000)) {
wParam = VK_LSHIFT;
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} else if (state[SDL_SCANCODE_RSHIFT] == SDL_RELEASED
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&& (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;
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case VK_RETURN:
if (lParam & EXTENDED_KEYMASK)
wParam = VK_ENTER;
break;
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}
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if (wParam < 256) {
SDL_SendKeyboardKey(index, SDL_PRESSED,
data->videodata->key_layout[wParam]);
}
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}
return (0);
case WM_SYSKEYUP:
case WM_KEYUP:
{
int index;
index = data->videodata->keyboard;
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wParam = RemapVKEY(wParam, lParam);
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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 */
{
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Uint8 *state = SDL_GetKeyboardState(NULL);
if (state[SDL_SCANCODE_LSHIFT] == SDL_PRESSED
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&& !(GetKeyState(VK_LSHIFT) & 0x8000)) {
wParam = VK_LSHIFT;
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} else if (state[SDL_SCANCODE_RSHIFT] == SDL_PRESSED
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&& !(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;
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case VK_RETURN:
if (lParam & EXTENDED_KEYMASK)
wParam = VK_ENTER;
break;
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}
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/* Windows only reports keyup for print screen */
if (wParam == VK_SNAPSHOT
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&& SDL_GetKeyboardState(NULL)[SDL_SCANCODE_PRINTSCREEN] ==
SDL_RELEASED) {
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SDL_SendKeyboardKey(index, SDL_PRESSED,
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data->videodata->key_layout[wParam]);
}
if (wParam < 256) {
SDL_SendKeyboardKey(index, SDL_RELEASED,
data->videodata->key_layout[wParam]);
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}
}
return (0);
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case WM_CHAR:
{
char text[4];
/* Convert to UTF-8 and send it on... */
if (wParam <= 0x7F) {
text[0] = (char) wParam;
text[1] = '\0';
} else if (wParam <= 0x7FF) {
text[0] = 0xC0 | (char) ((wParam >> 6) & 0x1F);
text[1] = 0x80 | (char) (wParam & 0x3F);
text[2] = '\0';
} else {
text[0] = 0xE0 | (char) ((wParam >> 12) & 0x0F);
text[1] = 0x80 | (char) ((wParam >> 6) & 0x3F);
text[2] = 0x80 | (char) (wParam & 0x3F);
text[3] = '\0';
}
SDL_SendKeyboardText(data->videodata->keyboard, text);
}
return (0);
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case WM_INPUTLANGCHANGE:
{
WIN_UpdateKeymap(data->videodata->keyboard);
}
return (1);
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case WM_GETMINMAXINFO:
{
MINMAXINFO *info;
RECT size;
int x, y;
int w, h;
int style;
/* If we allow resizing, let the resize happen naturally */
if (SDL_GetWindowFlags(data->windowID) & SDL_WINDOW_RESIZABLE) {
return (0);
}
/* Get the current position of our window */
GetWindowRect(hwnd, &size);
x = size.left;
y = size.top;
/* Calculate current size of our window */
SDL_GetWindowSize(data->windowID, &w, &h);
size.top = 0;
size.left = 0;
size.bottom = h;
size.right = w;
/* DJM - according to the docs for GetMenu(), the
return value is undefined if hwnd is a child window.
Aparently it's too difficult for MS to check
inside their function, so I have to do it here.
*/
style = GetWindowLong(hwnd, GWL_STYLE);
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AdjustWindowRect(&size, style,
style & WS_CHILDWINDOW ? FALSE : GetMenu(hwnd)
!= NULL);
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w = size.right - size.left;
h = size.bottom - size.top;
/* Fix our size to the current size */
info = (MINMAXINFO *) lParam;
info->ptMaxSize.x = w;
info->ptMaxSize.y = h;
info->ptMaxPosition.x = x;
info->ptMaxPosition.y = y;
info->ptMinTrackSize.x = w;
info->ptMinTrackSize.y = h;
info->ptMaxTrackSize.x = w;
info->ptMaxTrackSize.y = h;
}
return (0);
case WM_WINDOWPOSCHANGED:
{
RECT rect;
int x, y;
int w, h;
Uint32 window_flags;
GetClientRect(hwnd, &rect);
ClientToScreen(hwnd, (LPPOINT) & rect);
ClientToScreen(hwnd, (LPPOINT) & rect + 1);
window_flags = SDL_GetWindowFlags(data->windowID);
if ((window_flags & SDL_WINDOW_INPUT_GRABBED) &&
(window_flags & SDL_WINDOW_INPUT_FOCUS)) {
ClipCursor(&rect);
}
x = rect.left;
y = rect.top;
SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_MOVED, x, y);
w = rect.right - rect.left;
h = rect.bottom - rect.top;
SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_RESIZED, w,
h);
}
break;
case WM_SETCURSOR:
{
/*
Uint16 hittest;
hittest = LOWORD(lParam);
if (hittest == HTCLIENT) {
SetCursor(SDL_hcursor);
return (TRUE);
}
*/
}
break;
/* We are about to get palette focus! */
case WM_QUERYNEWPALETTE:
{
/*
WIN_RealizePalette(current_video);
return (TRUE);
*/
}
break;
/* Another application changed the palette */
case WM_PALETTECHANGED:
{
/*
WIN_PaletteChanged(current_video, (HWND) wParam);
*/
}
break;
/* We were occluded, refresh our display */
case WM_PAINT:
{
RECT rect;
if (GetUpdateRect(hwnd, &rect, FALSE)) {
ValidateRect(hwnd, &rect);
SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_EXPOSED,
0, 0);
}
}
return (0);
/* We'll do our own drawing, prevent flicker */
case WM_ERASEBKGND:
{
}
return (1);
case WM_SYSCOMMAND:
{
/* Don't start the screensaver or blank the monitor in fullscreen apps */
if ((wParam & 0xFFF0) == SC_SCREENSAVE ||
(wParam & 0xFFF0) == SC_MONITORPOWER) {
if (SDL_GetWindowFlags(data->windowID) &
SDL_WINDOW_FULLSCREEN) {
return (0);
}
}
}
break;
case WM_CLOSE:
{
SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_CLOSE, 0, 0);
}
return (0);
}
return CallWindowProc(data->wndproc, hwnd, msg, wParam, lParam);
}
void
WIN_PumpEvents(_THIS)
{
MSG msg;
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
static int app_registered = 0;
LPTSTR SDL_Appname = NULL;
Uint32 SDL_Appstyle = 0;
HINSTANCE SDL_Instance = NULL;
/* Register the class for this application */
int
SDL_RegisterApp(char *name, Uint32 style, void *hInst)
{
WNDCLASS class;
/* Only do this once... */
if (app_registered) {
++app_registered;
return (0);
}
if (!name && !SDL_Appname) {
name = "SDL_app";
SDL_Appstyle = (CS_BYTEALIGNCLIENT | CS_OWNDC);
SDL_Instance = hInst ? hInst : GetModuleHandle(NULL);
}
if (name) {
SDL_Appname = WIN_UTF8ToString(name);
SDL_Appstyle = style;
SDL_Instance = hInst ? hInst : GetModuleHandle(NULL);
}
/* Register the application class */
class.hCursor = NULL;
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class.hIcon =
LoadImage(SDL_Instance, SDL_Appname, IMAGE_ICON, 0, 0,
LR_DEFAULTCOLOR);
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class.lpszMenuName = NULL;
class.lpszClassName = SDL_Appname;
class.hbrBackground = NULL;
class.hInstance = SDL_Instance;
class.style = SDL_Appstyle;
class.lpfnWndProc = DefWindowProc;
class.cbWndExtra = 0;
class.cbClsExtra = 0;
if (!RegisterClass(&class)) {
SDL_SetError("Couldn't register application class");
return (-1);
}
app_registered = 1;
return (0);
}
/* Unregisters the windowclass registered in SDL_RegisterApp above. */
void
SDL_UnregisterApp()
{
WNDCLASS class;
/* SDL_RegisterApp might not have been called before */
if (!app_registered) {
return;
}
--app_registered;
if (app_registered == 0) {
/* Check for any registered window classes. */
if (GetClassInfo(SDL_Instance, SDL_Appname, &class)) {
UnregisterClass(SDL_Appname, SDL_Instance);
}
SDL_free(SDL_Appname);
SDL_Appname = NULL;
}
}
/* Sets an error message based on GetLastError() */
void
WIN_SetError(const char *prefix)
{
TCHAR buffer[1024];
char *message;
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FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 0,
buffer, SDL_arraysize(buffer), NULL);
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message = WIN_StringToUTF8(buffer);
SDL_SetError("%s%s%s", prefix ? prefix : "", prefix ? ":" : "", message);
SDL_free(message);
}
/* vi: set ts=4 sw=4 expandtab: */