/* Copyright 2012-2020 David Robillard Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /** @file win.c @brief Windows implementation. */ #include "win.h" #include "implementation.h" #include "stub.h" #include "pugl/pugl.h" #include "pugl/stub.h" #include #include #include #include #include #include #include #ifndef WM_MOUSEWHEEL # define WM_MOUSEWHEEL 0x020A #endif #ifndef WM_MOUSEHWHEEL # define WM_MOUSEHWHEEL 0x020E #endif #ifndef WHEEL_DELTA # define WHEEL_DELTA 120 #endif #ifndef GWLP_USERDATA # define GWLP_USERDATA (-21) #endif #define PUGL_LOCAL_CLOSE_MSG (WM_USER + 50) #define PUGL_LOCAL_MARK_MSG (WM_USER + 51) #define PUGL_LOCAL_CLIENT_MSG (WM_USER + 52) #define PUGL_USER_TIMER_MIN 9470 typedef BOOL (WINAPI *PFN_SetProcessDPIAware)(void); LRESULT CALLBACK wndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam); static wchar_t* puglUtf8ToWideChar(const char* const utf8) { const int len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0); if (len > 0) { wchar_t* result = (wchar_t*)calloc((size_t)len, sizeof(wchar_t)); MultiByteToWideChar(CP_UTF8, 0, utf8, -1, result, len); return result; } return NULL; } static char* puglWideCharToUtf8(const wchar_t* const wstr, size_t* len) { int n = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL); if (n > 0) { char* result = (char*)calloc((size_t)n, sizeof(char)); WideCharToMultiByte(CP_UTF8, 0, wstr, -1, result, n, NULL, NULL); *len = (size_t)n; return result; } return NULL; } static bool puglRegisterWindowClass(const char* name) { WNDCLASSEX wc = { 0 }; if (GetClassInfoEx(GetModuleHandle(NULL), name, &wc)) { return true; // Already registered } wc.cbSize = sizeof(wc); wc.style = CS_OWNDC; wc.lpfnWndProc = wndProc; wc.hInstance = GetModuleHandle(NULL); wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); wc.lpszClassName = name; return RegisterClassEx(&wc); } PuglWorldInternals* puglInitWorldInternals(PuglWorldType PUGL_UNUSED(type), PuglWorldFlags PUGL_UNUSED(flags)) { PuglWorldInternals* impl = (PuglWorldInternals*)calloc( 1, sizeof(PuglWorldInternals)); if (!impl) { return NULL; } HMODULE user32 = LoadLibrary("user32.dll"); if (user32) { PFN_SetProcessDPIAware SetProcessDPIAware = (PFN_SetProcessDPIAware)GetProcAddress( user32, "SetProcessDPIAware"); if (SetProcessDPIAware) { SetProcessDPIAware(); } FreeLibrary(user32); } LARGE_INTEGER frequency; QueryPerformanceFrequency(&frequency); impl->timerFrequency = (double)frequency.QuadPart; return impl; } void* puglGetNativeWorld(PuglWorld* PUGL_UNUSED(world)) { return GetModuleHandle(NULL); } PuglInternals* puglInitViewInternals(void) { return (PuglInternals*)calloc(1, sizeof(PuglInternals)); } static PuglStatus puglPollWinEvents(PuglWorld* world, const double timeout) { (void)world; if (timeout < 0) { WaitMessage(); } else { MsgWaitForMultipleObjects( 0, NULL, FALSE, (DWORD)(timeout * 1e3), QS_ALLEVENTS); } return PUGL_SUCCESS; } PuglStatus puglRealize(PuglView* view) { PuglInternals* impl = view->impl; if (impl->hwnd) { return PUGL_FAILURE; } // Getting depth from the display mode seems tedious, just set usual values if (view->hints[PUGL_RED_BITS] == PUGL_DONT_CARE) { view->hints[PUGL_RED_BITS] = 8; } if (view->hints[PUGL_BLUE_BITS] == PUGL_DONT_CARE) { view->hints[PUGL_BLUE_BITS] = 8; } if (view->hints[PUGL_GREEN_BITS] == PUGL_DONT_CARE) { view->hints[PUGL_GREEN_BITS] = 8; } if (view->hints[PUGL_ALPHA_BITS] == PUGL_DONT_CARE) { view->hints[PUGL_ALPHA_BITS] = 8; } // Get refresh rate for resize draw timer DEVMODEA devMode = {0}; EnumDisplaySettingsA(NULL, ENUM_CURRENT_SETTINGS, &devMode); view->hints[PUGL_REFRESH_RATE] = (int)devMode.dmDisplayFrequency; // Register window class if necessary if (!puglRegisterWindowClass(view->world->className)) { return PUGL_REGISTRATION_FAILED; } if (!view->backend || !view->backend->configure) { return PUGL_BAD_BACKEND; } PuglStatus st = PUGL_SUCCESS; if ((st = view->backend->configure(view)) || (st = view->backend->create(view))) { return st; } if (view->title) { puglSetWindowTitle(view, view->title); } view->impl->cursor = LoadCursor(NULL, IDC_ARROW); puglSetFrame(view, view->frame); SetWindowLongPtr(impl->hwnd, GWLP_USERDATA, (LONG_PTR)view); puglDispatchSimpleEvent(view, PUGL_CREATE); return PUGL_SUCCESS; } PuglStatus puglShow(PuglView* view) { PuglInternals* impl = view->impl; ShowWindow(impl->hwnd, SW_SHOWNORMAL); SetFocus(impl->hwnd); return PUGL_SUCCESS; } PuglStatus puglHide(PuglView* view) { PuglInternals* impl = view->impl; ShowWindow(impl->hwnd, SW_HIDE); return PUGL_SUCCESS; } void puglFreeViewInternals(PuglView* view) { if (view) { if (view->backend) { view->backend->destroy(view); } ReleaseDC(view->impl->hwnd, view->impl->hdc); DestroyWindow(view->impl->hwnd); free(view->impl); } } void puglFreeWorldInternals(PuglWorld* world) { UnregisterClass(world->className, NULL); free(world->impl); } static PuglKey keySymToSpecial(WPARAM sym) { // clang-format off switch (sym) { case VK_F1: return PUGL_KEY_F1; case VK_F2: return PUGL_KEY_F2; case VK_F3: return PUGL_KEY_F3; case VK_F4: return PUGL_KEY_F4; case VK_F5: return PUGL_KEY_F5; case VK_F6: return PUGL_KEY_F6; case VK_F7: return PUGL_KEY_F7; case VK_F8: return PUGL_KEY_F8; case VK_F9: return PUGL_KEY_F9; case VK_F10: return PUGL_KEY_F10; case VK_F11: return PUGL_KEY_F11; case VK_F12: return PUGL_KEY_F12; case VK_BACK: return PUGL_KEY_BACKSPACE; case VK_DELETE: return PUGL_KEY_DELETE; case VK_LEFT: return PUGL_KEY_LEFT; case VK_UP: return PUGL_KEY_UP; case VK_RIGHT: return PUGL_KEY_RIGHT; case VK_DOWN: return PUGL_KEY_DOWN; case VK_PRIOR: return PUGL_KEY_PAGE_UP; case VK_NEXT: return PUGL_KEY_PAGE_DOWN; case VK_HOME: return PUGL_KEY_HOME; case VK_END: return PUGL_KEY_END; case VK_INSERT: return PUGL_KEY_INSERT; case VK_SHIFT: case VK_LSHIFT: return PUGL_KEY_SHIFT_L; case VK_RSHIFT: return PUGL_KEY_SHIFT_R; case VK_CONTROL: case VK_LCONTROL: return PUGL_KEY_CTRL_L; case VK_RCONTROL: return PUGL_KEY_CTRL_R; case VK_MENU: case VK_LMENU: return PUGL_KEY_ALT_L; case VK_RMENU: return PUGL_KEY_ALT_R; case VK_LWIN: return PUGL_KEY_SUPER_L; case VK_RWIN: return PUGL_KEY_SUPER_R; case VK_CAPITAL: return PUGL_KEY_CAPS_LOCK; case VK_SCROLL: return PUGL_KEY_SCROLL_LOCK; case VK_NUMLOCK: return PUGL_KEY_NUM_LOCK; case VK_SNAPSHOT: return PUGL_KEY_PRINT_SCREEN; case VK_PAUSE: return PUGL_KEY_PAUSE; } // clang-format on return (PuglKey)0; } static uint32_t getModifiers(void) { // clang-format off return (((GetKeyState(VK_SHIFT) < 0) ? PUGL_MOD_SHIFT : 0u) | ((GetKeyState(VK_CONTROL) < 0) ? PUGL_MOD_CTRL : 0u) | ((GetKeyState(VK_MENU) < 0) ? PUGL_MOD_ALT : 0u) | ((GetKeyState(VK_LWIN) < 0) ? PUGL_MOD_SUPER : 0u) | ((GetKeyState(VK_RWIN) < 0) ? PUGL_MOD_SUPER : 0u)); // clang-format on } static void initMouseEvent(PuglEvent* event, PuglView* view, int button, bool press, LPARAM lParam) { POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) }; ClientToScreen(view->impl->hwnd, &pt); if (press) { SetCapture(view->impl->hwnd); } else { ReleaseCapture(); } event->button.time = GetMessageTime() / 1e3; event->button.type = press ? PUGL_BUTTON_PRESS : PUGL_BUTTON_RELEASE; event->button.x = GET_X_LPARAM(lParam); event->button.y = GET_Y_LPARAM(lParam); event->button.xRoot = pt.x; event->button.yRoot = pt.y; event->button.state = getModifiers(); event->button.button = (uint32_t)button; } static void initScrollEvent(PuglEvent* event, PuglView* view, LPARAM lParam) { POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) }; ScreenToClient(view->impl->hwnd, &pt); event->scroll.time = GetMessageTime() / 1e3; event->scroll.type = PUGL_SCROLL; event->scroll.x = pt.x; event->scroll.y = pt.y; event->scroll.xRoot = GET_X_LPARAM(lParam); event->scroll.yRoot = GET_Y_LPARAM(lParam); event->scroll.state = getModifiers(); event->scroll.dx = 0; event->scroll.dy = 0; } /// Return the code point for buf, or the replacement character on error static uint32_t puglDecodeUTF16(const wchar_t* buf, const int len) { const uint32_t c0 = buf[0]; const uint32_t c1 = buf[0]; if (c0 >= 0xD800 && c0 < 0xDC00) { if (len < 2) { return 0xFFFD; // Surrogate, but length is only 1 } else if (c1 >= 0xDC00 && c1 <= 0xDFFF) { return ((c0 & 0x03FF) << 10) + (c1 & 0x03FF) + 0x10000; } return 0xFFFD; // Unpaired surrogates } return c0; } static void initKeyEvent(PuglEventKey* event, PuglView* view, bool press, WPARAM wParam, LPARAM lParam) { POINT rpos = { 0, 0 }; GetCursorPos(&rpos); POINT cpos = { rpos.x, rpos.y }; ScreenToClient(view->impl->hwnd, &rpos); const unsigned scode = (uint32_t)((lParam & 0xFF0000) >> 16); const unsigned vkey = ((wParam == VK_SHIFT) ? MapVirtualKey(scode, MAPVK_VSC_TO_VK_EX) : (unsigned)wParam); const unsigned vcode = MapVirtualKey(vkey, MAPVK_VK_TO_VSC); const unsigned kchar = MapVirtualKey(vkey, MAPVK_VK_TO_CHAR); const bool dead = kchar >> (sizeof(UINT) * 8 - 1) & 1; const bool ext = lParam & 0x01000000; event->type = press ? PUGL_KEY_PRESS : PUGL_KEY_RELEASE; event->time = GetMessageTime() / 1e3; event->state = getModifiers(); event->xRoot = rpos.x; event->yRoot = rpos.y; event->x = cpos.x; event->y = cpos.y; event->keycode = (uint32_t)((lParam & 0xFF0000) >> 16); event->key = 0; const PuglKey special = keySymToSpecial(vkey); if (special) { if (ext && (special == PUGL_KEY_CTRL || special == PUGL_KEY_ALT)) { event->key = (uint32_t)special + 1u; // Right hand key } else { event->key = (uint32_t)special; } } else if (!dead) { // Translate unshifted key BYTE keyboardState[256] = {0}; wchar_t buf[5] = {0}; event->key = puglDecodeUTF16( buf, ToUnicode(vkey, vcode, keyboardState, buf, 4, 1 << 2)); } } static void initCharEvent(PuglEvent* event, PuglView* view, WPARAM wParam, LPARAM lParam) { const wchar_t utf16[2] = { wParam & 0xFFFF, (wParam >> 16) & 0xFFFF }; initKeyEvent(&event->key, view, true, wParam, lParam); event->type = PUGL_TEXT; event->text.character = puglDecodeUTF16(utf16, 2); if (!WideCharToMultiByte( CP_UTF8, 0, utf16, 2, event->text.string, 8, NULL, NULL)) { memset(event->text.string, 0, 8); } } static bool ignoreKeyEvent(PuglView* view, LPARAM lParam) { return view->hints[PUGL_IGNORE_KEY_REPEAT] && (lParam & (1 << 30)); } static RECT handleConfigure(PuglView* view, PuglEvent* event) { RECT rect; GetClientRect(view->impl->hwnd, &rect); MapWindowPoints(view->impl->hwnd, view->parent ? (HWND)view->parent : HWND_DESKTOP, (LPPOINT)&rect, 2); const LONG width = rect.right - rect.left; const LONG height = rect.bottom - rect.top; view->frame.x = rect.left; view->frame.y = rect.top; event->configure.type = PUGL_CONFIGURE; event->configure.x = view->frame.x; event->configure.y = view->frame.y; event->configure.width = width; event->configure.height = height; if (view->frame.width != width || view->frame.height != height) { view->frame.width = width; view->frame.height = height; } return rect; } static void handleCrossing(PuglView* view, const PuglEventType type, POINT pos) { POINT root_pos = pos; ClientToScreen(view->impl->hwnd, &root_pos); const PuglEventCrossing ev = { type, 0, GetMessageTime() / 1e3, (double)pos.x, (double)pos.y, (double)root_pos.x, (double)root_pos.y, getModifiers(), PUGL_CROSSING_NORMAL, }; puglDispatchEvent(view, (const PuglEvent*)&ev); } static void constrainAspect(const PuglView* const view, RECT* const size, const WPARAM wParam) { const float minA = (float)view->minAspectX / (float)view->minAspectY; const float maxA = (float)view->maxAspectX / (float)view->maxAspectY; const float w = (float)(size->right - size->left); const float h = (float)(size->bottom - size->top); const float a = w / h; switch (wParam) { case WMSZ_TOP: size->top = (a < minA ? (LONG)((float)size->bottom - w * minA) : a > maxA ? (LONG)((float)size->bottom - w * maxA) : size->top); break; case WMSZ_TOPRIGHT: case WMSZ_RIGHT: case WMSZ_BOTTOMRIGHT: size->right = (a < minA ? (LONG)((float)size->left + h * minA) : a > maxA ? (LONG)((float)size->left + h * maxA) : size->right); break; case WMSZ_BOTTOM: size->bottom = (a < minA ? (LONG)((float)size->top + w * minA) : a > maxA ? (LONG)((float)size->top + w * maxA) : size->bottom); break; case WMSZ_BOTTOMLEFT: case WMSZ_LEFT: case WMSZ_TOPLEFT: size->left = (a < minA ? (LONG)((float)size->right - h * minA) : a > maxA ? (LONG)((float)size->right - h * maxA) : size->left); break; } } static LRESULT handleMessage(PuglView* view, UINT message, WPARAM wParam, LPARAM lParam) { PuglEvent event = {{PUGL_NOTHING, 0}}; RECT rect = {0, 0, 0, 0}; POINT pt = {0, 0}; MINMAXINFO* mmi = NULL; void* dummy_ptr = NULL; if (InSendMessageEx(dummy_ptr)) { event.any.flags |= PUGL_IS_SEND_EVENT; } switch (message) { case WM_SETCURSOR: if (LOWORD(lParam) == HTCLIENT) { SetCursor(view->impl->cursor); } else { return DefWindowProc(view->impl->hwnd, message, wParam, lParam); } break; case WM_SHOWWINDOW: if (wParam) { handleConfigure(view, &event); puglDispatchEvent(view, &event); event.type = PUGL_NOTHING; RedrawWindow(view->impl->hwnd, NULL, NULL, RDW_INVALIDATE|RDW_ALLCHILDREN|RDW_INTERNALPAINT); } if ((bool)wParam != view->visible) { view->visible = wParam; event.any.type = wParam ? PUGL_MAP : PUGL_UNMAP; } break; case WM_SIZE: handleConfigure(view, &event); InvalidateRect(view->impl->hwnd, NULL, false); break; case WM_SIZING: if (view->minAspectX) { constrainAspect(view, (RECT*)lParam, wParam); return TRUE; } break; case WM_ENTERSIZEMOVE: case WM_ENTERMENULOOP: puglDispatchSimpleEvent(view, PUGL_LOOP_ENTER); break; case WM_TIMER: if (wParam >= PUGL_USER_TIMER_MIN) { PuglEvent ev = {{PUGL_TIMER, 0}}; ev.timer.id = wParam - PUGL_USER_TIMER_MIN; puglDispatchEvent(view, &ev); } break; case WM_EXITSIZEMOVE: case WM_EXITMENULOOP: puglDispatchSimpleEvent(view, PUGL_LOOP_LEAVE); break; case WM_GETMINMAXINFO: mmi = (MINMAXINFO*)lParam; mmi->ptMinTrackSize.x = view->minWidth; mmi->ptMinTrackSize.y = view->minHeight; if (view->maxWidth > 0 && view->maxHeight > 0) { mmi->ptMaxTrackSize.x = view->maxWidth; mmi->ptMaxTrackSize.y = view->maxHeight; } break; case WM_PAINT: GetUpdateRect(view->impl->hwnd, &rect, false); event.expose.type = PUGL_EXPOSE; event.expose.x = rect.left; event.expose.y = rect.top; event.expose.width = rect.right - rect.left; event.expose.height = rect.bottom - rect.top; break; case WM_ERASEBKGND: return true; case WM_MOUSEMOVE: pt.x = GET_X_LPARAM(lParam); pt.y = GET_Y_LPARAM(lParam); if (!view->impl->mouseTracked) { TRACKMOUSEEVENT tme = {0}; tme.cbSize = sizeof(tme); tme.dwFlags = TME_LEAVE; tme.hwndTrack = view->impl->hwnd; TrackMouseEvent(&tme); handleCrossing(view, PUGL_POINTER_IN, pt); view->impl->mouseTracked = true; } ClientToScreen(view->impl->hwnd, &pt); event.motion.type = PUGL_MOTION; event.motion.time = GetMessageTime() / 1e3; event.motion.x = GET_X_LPARAM(lParam); event.motion.y = GET_Y_LPARAM(lParam); event.motion.xRoot = pt.x; event.motion.yRoot = pt.y; event.motion.state = getModifiers(); break; case WM_MOUSELEAVE: GetCursorPos(&pt); ScreenToClient(view->impl->hwnd, &pt); handleCrossing(view, PUGL_POINTER_OUT, pt); view->impl->mouseTracked = false; break; case WM_LBUTTONDOWN: initMouseEvent(&event, view, 1, true, lParam); break; case WM_MBUTTONDOWN: initMouseEvent(&event, view, 2, true, lParam); break; case WM_RBUTTONDOWN: initMouseEvent(&event, view, 3, true, lParam); break; case WM_LBUTTONUP: initMouseEvent(&event, view, 1, false, lParam); break; case WM_MBUTTONUP: initMouseEvent(&event, view, 2, false, lParam); break; case WM_RBUTTONUP: initMouseEvent(&event, view, 3, false, lParam); break; case WM_MOUSEWHEEL: initScrollEvent(&event, view, lParam); event.scroll.dy = GET_WHEEL_DELTA_WPARAM(wParam) / (double)WHEEL_DELTA; event.scroll.direction = (event.scroll.dy > 0 ? PUGL_SCROLL_UP : PUGL_SCROLL_DOWN); break; case WM_MOUSEHWHEEL: initScrollEvent(&event, view, lParam); event.scroll.dx = GET_WHEEL_DELTA_WPARAM(wParam) / (double)WHEEL_DELTA; event.scroll.direction = (event.scroll.dx > 0 ? PUGL_SCROLL_RIGHT : PUGL_SCROLL_LEFT); break; case WM_KEYDOWN: if (!ignoreKeyEvent(view, lParam)) { initKeyEvent(&event.key, view, true, wParam, lParam); } break; case WM_KEYUP: initKeyEvent(&event.key, view, false, wParam, lParam); break; case WM_CHAR: initCharEvent(&event, view, wParam, lParam); break; case WM_SETFOCUS: event.type = PUGL_FOCUS_IN; break; case WM_KILLFOCUS: event.type = PUGL_FOCUS_OUT; break; case WM_SYSKEYDOWN: initKeyEvent(&event.key, view, true, wParam, lParam); break; case WM_SYSKEYUP: initKeyEvent(&event.key, view, false, wParam, lParam); break; case WM_SYSCHAR: return TRUE; case PUGL_LOCAL_CLIENT_MSG: event.client.type = PUGL_CLIENT; event.client.data1 = (uintptr_t)wParam; event.client.data2 = (uintptr_t)lParam; break; case WM_QUIT: case PUGL_LOCAL_CLOSE_MSG: event.any.type = PUGL_CLOSE; break; default: return DefWindowProc(view->impl->hwnd, message, wParam, lParam); } puglDispatchEvent(view, &event); return 0; } PuglStatus puglGrabFocus(PuglView* view) { SetFocus(view->impl->hwnd); return PUGL_SUCCESS; } bool puglHasFocus(const PuglView* view) { return GetFocus() == view->impl->hwnd; } PuglStatus puglRequestAttention(PuglView* view) { FLASHWINFO info = {sizeof(FLASHWINFO), view->impl->hwnd, FLASHW_ALL|FLASHW_TIMERNOFG, 1, 0}; FlashWindowEx(&info); return PUGL_SUCCESS; } PuglStatus puglStartTimer(PuglView* view, uintptr_t id, double timeout) { const UINT msec = (UINT)floor(timeout * 1000.0); return (SetTimer(view->impl->hwnd, PUGL_USER_TIMER_MIN + id, msec, NULL) ? PUGL_SUCCESS : PUGL_UNKNOWN_ERROR); } PuglStatus puglStopTimer(PuglView* view, uintptr_t id) { return (KillTimer(view->impl->hwnd, PUGL_USER_TIMER_MIN + id) ? PUGL_SUCCESS : PUGL_UNKNOWN_ERROR); } PuglStatus puglSendEvent(PuglView* view, const PuglEvent* event) { if (event->type == PUGL_CLIENT) { PostMessage(view->impl->hwnd, PUGL_LOCAL_CLIENT_MSG, (WPARAM)event->client.data1, (LPARAM)event->client.data2); return PUGL_SUCCESS; } return PUGL_UNSUPPORTED_TYPE; } #ifndef PUGL_DISABLE_DEPRECATED PuglStatus puglWaitForEvent(PuglView* PUGL_UNUSED(view)) { WaitMessage(); return PUGL_SUCCESS; } #endif static PuglStatus puglDispatchViewEvents(PuglView* view) { /* Windows has no facility to process only currently queued messages, which causes the event loop to run forever in cases like mouse movement where the queue is constantly being filled with new messages. To work around this, we post a message to ourselves before starting, record its time when it is received, then break the loop on the first message that was created afterwards. */ long markTime = 0; MSG msg; while (PeekMessage(&msg, view->impl->hwnd, 0, 0, PM_REMOVE)) { if (msg.message == PUGL_LOCAL_MARK_MSG) { markTime = GetMessageTime(); } else { TranslateMessage(&msg); DispatchMessage(&msg); if (markTime != 0 && GetMessageTime() > markTime) { break; } } } return PUGL_SUCCESS; } static PuglStatus puglDispatchWinEvents(PuglWorld* world) { for (size_t i = 0; i < world->numViews; ++i) { PostMessage(world->views[i]->impl->hwnd, PUGL_LOCAL_MARK_MSG, 0, 0); } for (size_t i = 0; i < world->numViews; ++i) { puglDispatchViewEvents(world->views[i]); } return PUGL_SUCCESS; } PuglStatus puglUpdate(PuglWorld* world, double timeout) { const double startTime = puglGetTime(world); PuglStatus st = PUGL_SUCCESS; if (timeout < 0.0) { st = puglPollWinEvents(world, timeout); st = st ? st : puglDispatchWinEvents(world); } else if (timeout == 0.0) { st = puglDispatchWinEvents(world); } else { const double endTime = startTime + timeout - 0.001; for (double t = startTime; t < endTime; t = puglGetTime(world)) { if ((st = puglPollWinEvents(world, endTime - t)) || (st = puglDispatchWinEvents(world))) { break; } } } for (size_t i = 0; i < world->numViews; ++i) { if (world->views[i]->visible) { puglDispatchSimpleEvent(world->views[i], PUGL_UPDATE); } UpdateWindow(world->views[i]->impl->hwnd); } return st; } #ifndef PUGL_DISABLE_DEPRECATED PuglStatus puglProcessEvents(PuglView* view) { return puglUpdate(view->world, 0.0); } #endif LRESULT CALLBACK wndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { PuglView* view = (PuglView*)GetWindowLongPtr(hwnd, GWLP_USERDATA); switch (message) { case WM_CREATE: PostMessage(hwnd, WM_SHOWWINDOW, TRUE, 0); return 0; case WM_CLOSE: PostMessage(hwnd, PUGL_LOCAL_CLOSE_MSG, wParam, lParam); return 0; case WM_DESTROY: return 0; default: if (view && hwnd == view->impl->hwnd) { return handleMessage(view, message, wParam, lParam); } else { return DefWindowProc(hwnd, message, wParam, lParam); } } } double puglGetTime(const PuglWorld* world) { LARGE_INTEGER count; QueryPerformanceCounter(&count); return ((double)count.QuadPart / world->impl->timerFrequency - world->startTime); } PuglStatus puglPostRedisplay(PuglView* view) { InvalidateRect(view->impl->hwnd, NULL, false); return PUGL_SUCCESS; } PuglStatus puglPostRedisplayRect(PuglView* view, const PuglRect rect) { const RECT r = {(long)floor(rect.x), (long)floor(rect.y), (long)ceil(rect.x + rect.width), (long)ceil(rect.y + rect.height)}; InvalidateRect(view->impl->hwnd, &r, false); return PUGL_SUCCESS; } PuglNativeView puglGetNativeWindow(PuglView* view) { return (PuglNativeView)view->impl->hwnd; } PuglStatus puglSetWindowTitle(PuglView* view, const char* title) { puglSetString(&view->title, title); if (view->impl->hwnd) { wchar_t* wtitle = puglUtf8ToWideChar(title); if (wtitle) { SetWindowTextW(view->impl->hwnd, wtitle); free(wtitle); } } return PUGL_SUCCESS; } PuglStatus puglSetFrame(PuglView* view, const PuglRect frame) { view->frame = frame; if (view->impl->hwnd) { RECT rect = { (long)frame.x, (long)frame.y, (long)frame.x + (long)frame.width, (long)frame.y + (long)frame.height }; AdjustWindowRectEx(&rect, puglWinGetWindowFlags(view), FALSE, puglWinGetWindowExFlags(view)); if (!SetWindowPos(view->impl->hwnd, HWND_TOP, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER)) { return PUGL_UNKNOWN_ERROR; } } return PUGL_SUCCESS; } PuglStatus puglSetDefaultSize(PuglView* const view, const int width, const int height) { view->defaultWidth = width; view->defaultHeight = height; return PUGL_SUCCESS; } PuglStatus puglSetMinSize(PuglView* const view, const int width, const int height) { view->minWidth = width; view->minHeight = height; return PUGL_SUCCESS; } PuglStatus puglSetMaxSize(PuglView* const view, const int width, const int height) { view->maxWidth = width; view->maxHeight = height; return PUGL_SUCCESS; } PuglStatus puglSetAspectRatio(PuglView* const view, const int minX, const int minY, const int maxX, const int maxY) { view->minAspectX = minX; view->minAspectY = minY; view->maxAspectX = maxX; view->maxAspectY = maxY; return PUGL_SUCCESS; } PuglStatus puglSetTransientFor(PuglView* view, PuglNativeView parent) { if (view->parent) { return PUGL_FAILURE; } view->transientParent = parent; if (view->impl->hwnd) { SetWindowLongPtr(view->impl->hwnd, GWLP_HWNDPARENT, (LONG_PTR)parent); return GetLastError() == NO_ERROR ? PUGL_SUCCESS : PUGL_FAILURE; } return PUGL_SUCCESS; } const void* puglGetClipboard(PuglView* const view, const char** const type, size_t* const len) { PuglInternals* const impl = view->impl; if (!IsClipboardFormatAvailable(CF_UNICODETEXT) || !OpenClipboard(impl->hwnd)) { return NULL; } HGLOBAL mem = GetClipboardData(CF_UNICODETEXT); wchar_t* wstr = mem ? (wchar_t*)GlobalLock(mem) : NULL; if (!wstr) { CloseClipboard(); return NULL; } free(view->clipboard.data); view->clipboard.data = puglWideCharToUtf8(wstr, &view->clipboard.len); GlobalUnlock(mem); CloseClipboard(); return puglGetInternalClipboard(view, type, len); } PuglStatus puglSetClipboard(PuglView* const view, const char* const type, const void* const data, const size_t len) { PuglInternals* const impl = view->impl; PuglStatus st = puglSetInternalClipboard(view, type, data, len); if (st) { return st; } else if (!OpenClipboard(impl->hwnd)) { return PUGL_UNKNOWN_ERROR; } // Measure string and allocate global memory for clipboard const char* str = (const char*)data; const int wlen = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0); HGLOBAL mem = GlobalAlloc(GMEM_MOVEABLE, (size_t)(wlen + 1) * sizeof(wchar_t)); if (!mem) { CloseClipboard(); return PUGL_UNKNOWN_ERROR; } // Lock global memory wchar_t* wstr = (wchar_t*)GlobalLock(mem); if (!wstr) { GlobalFree(mem); CloseClipboard(); return PUGL_UNKNOWN_ERROR; } // Convert string into global memory and set it as clipboard data MultiByteToWideChar(CP_UTF8, 0, str, (int)len, wstr, wlen); wstr[wlen] = 0; GlobalUnlock(mem); SetClipboardData(CF_UNICODETEXT, mem); CloseClipboard(); return PUGL_SUCCESS; } static const char* const cursor_ids[] = { IDC_ARROW, // ARROW IDC_IBEAM, // CARET IDC_CROSS, // CROSSHAIR IDC_HAND, // HAND IDC_NO, // NO IDC_SIZEWE, // LEFT_RIGHT IDC_SIZENS, // UP_DOWN }; PuglStatus puglSetCursor(PuglView* view, PuglCursor cursor) { PuglInternals* const impl = view->impl; const unsigned index = (unsigned)cursor; const unsigned count = sizeof(cursor_ids) / sizeof(cursor_ids[0]); if (index >= count) { return PUGL_BAD_PARAMETER; } const HCURSOR cur = LoadCursor(NULL, cursor_ids[index]); if (!cur) { return PUGL_FAILURE; } impl->cursor = cur; if (impl->mouseTracked) { SetCursor(cur); } return PUGL_SUCCESS; }