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SDL_windowsevents.c
712 lines (627 loc) · 20.7 KB
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 Sam Lantinga
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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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#include "SDL_config.h"
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#include "SDL_windowsvideo.h"
#include "SDL_windowsshape.h"
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#include "SDL_syswm.h"
#include "SDL_vkeys.h"
#include "../../events/SDL_events_c.h"
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#include "../../events/SDL_touch_c.h"
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/*#define WMMSG_DEBUG*/
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#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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#ifndef WM_TOUCH
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#define WM_TOUCH 0x0240
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#endif
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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.
Keypad arrow keys have the same scancode as normal arrow keys,
except they don't have the extended bit (0x1000000) set.
*/
if (!(lParam & 0x1000000)) {
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if (wParam == VK_DELETE) {
wParam = VK_DECIMAL;
} else {
for (i = 0; i < SDL_arraysize(keypad_scancodes); ++i) {
if (scancode == keypad_scancodes[i]) {
wParam = VK_NUMPAD0 + i;
break;
}
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}
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}
}
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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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LRESULT returnCode = -1;
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/* Send a SDL_SYSWMEVENT if the application wants them */
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if (SDL_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) {
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SDL_SysWMmsg wmmsg;
SDL_VERSION(&wmmsg.version);
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wmmsg.subsystem = SDL_SYSWM_WINDOWS;
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wmmsg.msg.win.hwnd = hwnd;
wmmsg.msg.win.msg = msg;
wmmsg.msg.win.wParam = wParam;
wmmsg.msg.win.lParam = lParam;
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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);
}
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#ifdef WMMSG_DEBUG
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{
FILE *log = fopen("wmmsg.txt", "a");
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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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}
#endif
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if (IME_HandleMessage(hwnd, msg, wParam, &lParam, data->videodata))
return 0;
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switch (msg) {
case WM_SHOWWINDOW:
{
if (wParam) {
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_SHOWN, 0, 0);
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} else {
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_HIDDEN, 0, 0);
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}
}
break;
case WM_ACTIVATE:
{
BOOL minimized;
minimized = HIWORD(wParam);
if (!minimized && (LOWORD(wParam) != WA_INACTIVE)) {
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_SHOWN, 0, 0);
SDL_SendWindowEvent(data->window,
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SDL_WINDOWEVENT_RESTORED, 0, 0);
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#ifndef _WIN32_WCE /* WinCE misses IsZoomed() */
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if (IsZoomed(hwnd)) {
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SDL_SendWindowEvent(data->window,
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SDL_WINDOWEVENT_MAXIMIZED, 0, 0);
}
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#endif
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if (SDL_GetKeyboardFocus() != data->window) {
SDL_SetKeyboardFocus(data->window);
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}
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/*
* FIXME: Update keyboard state
*/
WIN_CheckClipboardUpdate(data->videodata);
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} else {
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if (SDL_GetKeyboardFocus() == data->window) {
SDL_SetKeyboardFocus(NULL);
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}
if (minimized) {
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SDL_SendWindowEvent(data->window,
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SDL_WINDOWEVENT_MINIMIZED, 0, 0);
}
}
}
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returnCode = 0;
break;
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case WM_MOUSEMOVE:
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#ifdef _WIN32_WCE
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/* transform coords for VGA, WVGA... */
{
SDL_VideoData *videodata = data->videodata;
if(videodata->CoordTransform &&
(videodata->render == RENDER_GAPI || videodata->render == RENDER_RAW))
{
POINT pt;
pt.x = LOWORD(lParam);
pt.y = HIWORD(lParam);
videodata->CoordTransform(data->window, &pt);
SDL_SendMouseMotion(data->window, 0, pt.x, pt.y);
break;
}
}
#endif
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SDL_SendMouseMotion(data->window, 0, LOWORD(lParam), HIWORD(lParam));
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break;
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case WM_LBUTTONDOWN:
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SDL_SendMouseButton(data->window, SDL_PRESSED, SDL_BUTTON_LEFT);
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break;
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case WM_LBUTTONUP:
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SDL_SendMouseButton(data->window, SDL_RELEASED, SDL_BUTTON_LEFT);
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break;
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case WM_RBUTTONDOWN:
SDL_SendMouseButton(data->window, SDL_PRESSED, SDL_BUTTON_RIGHT);
break;
case WM_RBUTTONUP:
SDL_SendMouseButton(data->window, SDL_RELEASED, SDL_BUTTON_RIGHT);
break;
case WM_MBUTTONDOWN:
SDL_SendMouseButton(data->window, SDL_PRESSED, SDL_BUTTON_MIDDLE);
break;
case WM_MBUTTONUP:
SDL_SendMouseButton(data->window, SDL_RELEASED, SDL_BUTTON_MIDDLE);
break;
case WM_XBUTTONDOWN:
SDL_SendMouseButton(data->window, SDL_PRESSED, SDL_BUTTON_X1 + GET_XBUTTON_WPARAM(wParam) - 1);
returnCode = TRUE;
break;
case WM_XBUTTONUP:
SDL_SendMouseButton(data->window, SDL_RELEASED, SDL_BUTTON_X1 + GET_XBUTTON_WPARAM(wParam) - 1);
returnCode = TRUE;
break;
case WM_MOUSEWHEEL:
{
int motion = (short) HIWORD(wParam);
SDL_SendMouseWheel(data->window, 0, motion);
break;
}
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case WM_MOUSELEAVE:
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if (SDL_GetMouseFocus() == data->window) {
SDL_SetMouseFocus(NULL);
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}
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returnCode = 0;
break;
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case WM_SYSKEYDOWN:
case WM_KEYDOWN:
{
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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 */
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wParam = 256;
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}
}
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) {
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SDL_SendKeyboardKey(SDL_PRESSED,
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data->videodata->key_layout[wParam]);
}
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}
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returnCode = 0;
break;
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case WM_SYSKEYUP:
case WM_KEYUP:
{
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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 */
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wParam = 256;
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}
}
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(SDL_PRESSED,
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data->videodata->key_layout[wParam]);
}
if (wParam < 256) {
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SDL_SendKeyboardKey(SDL_RELEASED,
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data->videodata->key_layout[wParam]);
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}
}
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returnCode = 0;
break;
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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';
}
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SDL_SendKeyboardText(text);
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}
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returnCode = 0;
break;
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case WM_INPUTLANGCHANGE:
{
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WIN_UpdateKeymap();
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}
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returnCode = 1;
break;
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case WM_GETMINMAXINFO:
{
MINMAXINFO *info;
RECT size;
int x, y;
int w, h;
int style;
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BOOL menu;
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/* If we allow resizing, let the resize happen naturally */
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if(SDL_IsShapedWindow(data->window))
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Win32_ResizeWindowShape(data->window);
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if (SDL_GetWindowFlags(data->window) & SDL_WINDOW_RESIZABLE) {
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returnCode = 0;
break;
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}
/* Get the current position of our window */
GetWindowRect(hwnd, &size);
x = size.left;
y = size.top;
/* Calculate current size of our window */
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SDL_GetWindowSize(data->window, &w, &h);
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size.top = 0;
size.left = 0;
size.bottom = h;
size.right = w;
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style = GetWindowLong(hwnd, GWL_STYLE);
#ifdef _WIN32_WCE
menu = FALSE;
#else
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/* 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.
*/
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menu = (style & WS_CHILDWINDOW) ? FALSE : (GetMenu(hwnd) != NULL);
#endif
AdjustWindowRectEx(&size, style, menu, 0);
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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;
}
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returnCode = 0;
break;
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case WM_WINDOWPOSCHANGED:
{
RECT rect;
int x, y;
int w, h;
Uint32 window_flags;
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if (!GetClientRect(hwnd, &rect) ||
(rect.right == rect.left && rect.bottom == rect.top)) {
break;
}
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ClientToScreen(hwnd, (LPPOINT) & rect);
ClientToScreen(hwnd, (LPPOINT) & rect + 1);
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window_flags = SDL_GetWindowFlags(data->window);
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if ((window_flags & SDL_WINDOW_INPUT_GRABBED) &&
(window_flags & SDL_WINDOW_INPUT_FOCUS)) {
ClipCursor(&rect);
}
x = rect.left;
y = rect.top;
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_MOVED, x, y);
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w = rect.right - rect.left;
h = rect.bottom - rect.top;
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_RESIZED, w,
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h);
}
break;
case WM_SETCURSOR:
{
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Uint16 hittest;
hittest = LOWORD(lParam);
if (hittest == HTCLIENT) {
/* FIXME: Implement the cursor API */
static HCURSOR cursor;
if (!cursor) {
cursor = LoadCursor(NULL, IDC_ARROW);
}
SetCursor(cursor);
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returnCode = TRUE;
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}
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}
break;
/* We are about to get palette focus! */
case WM_QUERYNEWPALETTE:
{
/*
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WIN_RealizePalette(current_video);
returnCode = TRUE;
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*/
}
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);
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_EXPOSED,
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0, 0);
}
}
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returnCode = 0;
break;
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/* 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) {
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if (SDL_GetVideoDevice()->suspend_screensaver) {
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return (0);
}
}
}
break;
case WM_CLOSE:
{
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_CLOSE, 0, 0);
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}
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returnCode = 0;
break;
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case WM_TOUCH:
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{
UINT i, num_inputs = LOWORD(wParam);
PTOUCHINPUT inputs = SDL_stack_alloc(TOUCHINPUT, num_inputs);
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if (data->videodata->GetTouchInputInfo((HTOUCHINPUT)lParam, num_inputs, inputs, sizeof(TOUCHINPUT))) {
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RECT rect;
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float x, y;
if (!GetClientRect(hwnd, &rect) ||
(rect.right == rect.left && rect.bottom == rect.top)) {
break;
}
ClientToScreen(hwnd, (LPPOINT) & rect);
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ClientToScreen(hwnd, (LPPOINT) & rect + 1);
rect.top *= 100;
rect.left *= 100;
rect.bottom *= 100;
rect.right *= 100;
for (i = 0; i < num_inputs; ++i) {
PTOUCHINPUT input = &inputs[i];
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SDL_TouchID touchId = (SDL_TouchID)input->hSource;
if (!SDL_GetTouch(touchId)) {
SDL_Touch touch;
touch.id = touchId;
touch.x_min = 0;
touch.x_max = 1;
touch.native_xres = touch.x_max - touch.x_min;
touch.y_min = 0;
touch.y_max = 1;
touch.native_yres = touch.y_max - touch.y_min;
touch.pressure_min = 0;
touch.pressure_max = 1;
touch.native_pressureres = touch.pressure_max - touch.pressure_min;
if (SDL_AddTouch(&touch, "") < 0) {
continue;
}
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}
// Get the normalized coordinates for the window
x = (float)(input->x - rect.left)/(rect.right - rect.left);
y = (float)(input->y - rect.top)/(rect.bottom - rect.top);
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if (input->dwFlags & TOUCHEVENTF_DOWN) {
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SDL_SendFingerDown(touchId, input->dwID, SDL_TRUE, x, y, 1);
}
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if (input->dwFlags & TOUCHEVENTF_MOVE) {
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SDL_SendTouchMotion(touchId, input->dwID, SDL_FALSE, x, y, 1);
}
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if (input->dwFlags & TOUCHEVENTF_UP) {
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SDL_SendFingerDown(touchId, input->dwID, SDL_FALSE, x, y, 1);
}
}
}
SDL_stack_free(inputs);
data->videodata->CloseTouchInputHandle((HTOUCHINPUT)lParam);
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return 0;
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}
break;
}
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/* If there's a window proc, assume it's going to handle messages */
if (data->wndproc) {
return CallWindowProc(data->wndproc, hwnd, msg, wParam, lParam);
} else if (returnCode >= 0) {
return returnCode;
} else {
return CallWindowProc(DefWindowProc, hwnd, msg, wParam, lParam);
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}
}
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;
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class.lpfnWndProc = WIN_WindowProc;
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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;
}
}
/* vi: set ts=4 sw=4 expandtab: */