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529 lines
16 KiB
C
529 lines
16 KiB
C
/*
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Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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/* Simple program: Loop, watching keystrokes
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Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to
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pump the event loop and catch keystrokes.
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*/
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#include <SDL3/SDL.h>
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#include <SDL3/SDL_main.h>
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#include <SDL3/SDL_test.h>
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#ifdef SDL_PLATFORM_EMSCRIPTEN
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#include <emscripten/emscripten.h>
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#endif
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#define TEXT_WINDOW_OFFSET_X 2.0f
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#define TEXT_WINDOW_OFFSET_Y (2.0f + FONT_LINE_HEIGHT)
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#define CURSOR_BLINK_INTERVAL_MS 500
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typedef struct
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{
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SDLTest_TextWindow *textwindow;
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char *edit_text;
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int edit_cursor;
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int edit_length;
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} TextWindowState;
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static SDLTest_CommonState *state;
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static TextWindowState *windowstates;
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static bool escape_pressed;
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static bool cursor_visible;
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static Uint64 last_cursor_change;
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static int done;
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static TextWindowState *GetTextWindowStateForWindowID(SDL_WindowID id)
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{
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int i;
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for (i = 0; i < state->num_windows; ++i) {
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if (id == SDL_GetWindowID(state->windows[i])) {
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return &windowstates[i];
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}
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}
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return NULL;
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}
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static SDLTest_TextWindow *GetTextWindowForWindowID(SDL_WindowID id)
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{
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TextWindowState *windowstate = GetTextWindowStateForWindowID(id);
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if (windowstate) {
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return windowstate->textwindow;
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}
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return NULL;
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}
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static void UpdateTextWindowInputRect(SDL_WindowID id)
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{
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int i;
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for (i = 0; i < state->num_windows; ++i) {
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if (id == SDL_GetWindowID(state->windows[i])) {
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SDLTest_TextWindow *textwindow = windowstates[i].textwindow;
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int w, h;
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SDL_Rect rect;
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int cursor = 0;
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int current = textwindow->current;
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const char *current_line = textwindow->lines[current];
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SDL_GetWindowSize(state->windows[i], &w, &h);
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if (current_line) {
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cursor = (int)SDL_utf8strlen(current_line) * FONT_CHARACTER_SIZE;
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}
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rect.x = (int)TEXT_WINDOW_OFFSET_X;
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rect.y = (int)TEXT_WINDOW_OFFSET_Y + current * FONT_LINE_HEIGHT;
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rect.w = (int)(w - (2 * TEXT_WINDOW_OFFSET_X));
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rect.h = FONT_CHARACTER_SIZE;
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SDL_SetTextInputArea(state->windows[i], &rect, cursor);
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return;
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}
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}
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}
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static void print_string(char **text, size_t *maxlen, const char *fmt, ...)
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{
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int len;
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va_list ap;
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va_start(ap, fmt);
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len = SDL_vsnprintf(*text, *maxlen, fmt, ap);
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if (len > 0) {
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*text += len;
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if (((size_t)len) < *maxlen) {
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*maxlen -= (size_t)len;
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} else {
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*maxlen = 0;
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}
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}
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va_end(ap);
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}
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static void print_modifiers(char **text, size_t *maxlen, SDL_Keymod mod)
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{
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print_string(text, maxlen, " modifiers:");
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if (mod == SDL_KMOD_NONE) {
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print_string(text, maxlen, " (none)");
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return;
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}
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if ((mod & SDL_KMOD_SHIFT) == SDL_KMOD_SHIFT) {
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print_string(text, maxlen, " SHIFT");
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} else {
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if (mod & SDL_KMOD_LSHIFT) {
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print_string(text, maxlen, " LSHIFT");
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}
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if (mod & SDL_KMOD_RSHIFT) {
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print_string(text, maxlen, " RSHIFT");
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}
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}
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if ((mod & SDL_KMOD_CTRL) == SDL_KMOD_CTRL) {
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print_string(text, maxlen, " CTRL");
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} else {
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if (mod & SDL_KMOD_LCTRL) {
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print_string(text, maxlen, " LCTRL");
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}
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if (mod & SDL_KMOD_RCTRL) {
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print_string(text, maxlen, " RCTRL");
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}
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}
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if ((mod & SDL_KMOD_ALT) == SDL_KMOD_ALT) {
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print_string(text, maxlen, " ALT");
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} else {
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if (mod & SDL_KMOD_LALT) {
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print_string(text, maxlen, " LALT");
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}
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if (mod & SDL_KMOD_RALT) {
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print_string(text, maxlen, " RALT");
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}
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}
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if ((mod & SDL_KMOD_GUI) == SDL_KMOD_GUI) {
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print_string(text, maxlen, " GUI");
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} else {
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if (mod & SDL_KMOD_LGUI) {
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print_string(text, maxlen, " LGUI");
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}
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if (mod & SDL_KMOD_RGUI) {
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print_string(text, maxlen, " RGUI");
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}
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}
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if (mod & SDL_KMOD_NUM) {
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print_string(text, maxlen, " NUM");
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}
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if (mod & SDL_KMOD_CAPS) {
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print_string(text, maxlen, " CAPS");
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}
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if (mod & SDL_KMOD_MODE) {
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print_string(text, maxlen, " MODE");
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}
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if (mod & SDL_KMOD_SCROLL) {
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print_string(text, maxlen, " SCROLL");
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}
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}
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static void PrintModifierState(void)
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{
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char message[512];
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char *spot;
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size_t left;
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spot = message;
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left = sizeof(message);
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print_modifiers(&spot, &left, SDL_GetModState());
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SDL_Log("Initial state:%s\n", message);
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}
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static void PrintKey(SDL_KeyboardEvent *event)
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{
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char message[512];
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char *spot;
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size_t left;
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spot = message;
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left = sizeof(message);
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/* Print the keycode, name and state */
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if (event->key) {
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print_string(&spot, &left,
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"Key %s: raw 0x%.2x, scancode %d = %s, keycode 0x%08X = %s ",
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event->down ? "pressed " : "released",
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event->raw,
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event->scancode,
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event->scancode == SDL_SCANCODE_UNKNOWN ? "UNKNOWN" : SDL_GetScancodeName(event->scancode),
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event->key, SDL_GetKeyName(event->key));
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} else {
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print_string(&spot, &left,
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"Unknown Key (raw 0x%.2x, scancode %d = %s) %s ",
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event->raw,
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event->scancode,
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event->scancode == SDL_SCANCODE_UNKNOWN ? "UNKNOWN" : SDL_GetScancodeName(event->scancode),
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event->down ? "pressed " : "released");
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}
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print_modifiers(&spot, &left, event->mod);
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if (event->repeat) {
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print_string(&spot, &left, " (repeat)");
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}
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SDL_Log("%s\n", message);
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}
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static void PrintText(const char *eventtype, const char *text)
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{
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const char *spot;
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char expanded[1024];
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expanded[0] = '\0';
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for (spot = text; *spot; ++spot) {
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size_t length = SDL_strlen(expanded);
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(void)SDL_snprintf(expanded + length, sizeof(expanded) - length, "\\x%.2x", (unsigned char)*spot);
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}
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SDL_Log("%s Text (%s): \"%s%s\"\n", eventtype, expanded, *text == '"' ? "\\" : "", text);
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}
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static void CountKeysDown(void)
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{
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int i, count = 0, max_keys = 0;
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const bool *keystate = SDL_GetKeyboardState(&max_keys);
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for (i = 0; i < max_keys; ++i) {
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if (keystate[i]) {
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++count;
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}
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}
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SDL_Log("Keys down: %d\n", count);
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}
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static void DrawCursor(int i)
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{
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SDL_FRect rect;
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TextWindowState *windowstate = &windowstates[i];
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SDLTest_TextWindow *textwindow = windowstate->textwindow;
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int current = textwindow->current;
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const char *current_line = textwindow->lines[current];
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rect.x = TEXT_WINDOW_OFFSET_X;
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if (current_line) {
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rect.x += SDL_utf8strlen(current_line) * FONT_CHARACTER_SIZE;
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}
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if (windowstate->edit_cursor > 0) {
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rect.x += (float)windowstate->edit_cursor * FONT_CHARACTER_SIZE;
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}
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rect.y = TEXT_WINDOW_OFFSET_Y + current * FONT_LINE_HEIGHT;
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rect.w = FONT_CHARACTER_SIZE * 0.75f;
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rect.h = (float)FONT_CHARACTER_SIZE;
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SDL_SetRenderDrawColor(state->renderers[i], 0xAA, 0xAA, 0xAA, 255);
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SDL_RenderFillRect(state->renderers[i], &rect);
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}
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static void DrawEditText(int i)
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{
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SDL_FRect rect;
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TextWindowState *windowstate = &windowstates[i];
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SDLTest_TextWindow *textwindow = windowstate->textwindow;
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int current = textwindow->current;
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const char *current_line = textwindow->lines[current];
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if (windowstate->edit_text == NULL) {
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return;
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}
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/* Draw the highlight under the selected text */
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if (windowstate->edit_length > 0) {
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rect.x = TEXT_WINDOW_OFFSET_X;
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if (current_line) {
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rect.x += SDL_utf8strlen(current_line) * FONT_CHARACTER_SIZE;
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}
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if (windowstate->edit_cursor > 0) {
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rect.x += (float)windowstate->edit_cursor * FONT_CHARACTER_SIZE;
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}
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rect.y = TEXT_WINDOW_OFFSET_Y + current * FONT_LINE_HEIGHT;
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rect.w = (float)windowstate->edit_length * FONT_CHARACTER_SIZE;
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rect.h = (float)FONT_CHARACTER_SIZE;
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SDL_SetRenderDrawColor(state->renderers[i], 0xAA, 0xAA, 0xAA, 255);
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SDL_RenderFillRect(state->renderers[i], &rect);
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}
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/* Draw the edit text */
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rect.x = TEXT_WINDOW_OFFSET_X;
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if (current_line) {
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rect.x += SDL_utf8strlen(current_line) * FONT_CHARACTER_SIZE;
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}
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rect.y = TEXT_WINDOW_OFFSET_Y + current * FONT_LINE_HEIGHT;
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SDL_SetRenderDrawColor(state->renderers[i], 255, 255, 0, 255);
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SDLTest_DrawString(state->renderers[i], rect.x, rect.y, windowstate->edit_text);
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}
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static void loop(void)
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{
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SDL_Event event;
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Uint64 now;
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int i;
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char line[1024];
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while (SDL_PollEvent(&event)) {
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switch (event.type) {
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case SDL_EVENT_KEY_DOWN:
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case SDL_EVENT_KEY_UP:
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PrintKey(&event.key);
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if (event.type == SDL_EVENT_KEY_DOWN) {
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switch (event.key.key) {
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case SDLK_BACKSPACE:
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SDLTest_TextWindowAddText(GetTextWindowForWindowID(event.key.windowID), "\b");
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UpdateTextWindowInputRect(event.key.windowID);
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break;
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case SDLK_RETURN:
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SDLTest_TextWindowAddText(GetTextWindowForWindowID(event.key.windowID), "\n");
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UpdateTextWindowInputRect(event.key.windowID);
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break;
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default:
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break;
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}
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if (event.key.key == SDLK_ESCAPE) {
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/* Pressing escape twice will stop the application */
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if (escape_pressed) {
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done = 1;
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} else {
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escape_pressed = true;
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}
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} else {
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escape_pressed = true;
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}
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}
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CountKeysDown();
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break;
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case SDL_EVENT_TEXT_EDITING:
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{
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TextWindowState *windowstate = GetTextWindowStateForWindowID(event.edit.windowID);
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if (windowstate->edit_text) {
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SDL_free(windowstate->edit_text);
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windowstate->edit_text = NULL;
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}
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if (event.edit.text && *event.edit.text) {
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windowstate->edit_text = SDL_strdup(event.edit.text);
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}
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windowstate->edit_cursor = event.edit.start;
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windowstate->edit_length = event.edit.length;
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SDL_snprintf(line, sizeof(line), "EDIT %" SDL_PRIs32 ":%" SDL_PRIs32, event.edit.start, event.edit.length);
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PrintText(line, event.edit.text);
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break;
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}
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case SDL_EVENT_TEXT_INPUT:
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PrintText("INPUT", event.text.text);
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SDLTest_TextWindowAddText(GetTextWindowForWindowID(event.text.windowID), "%s", event.text.text);
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UpdateTextWindowInputRect(event.text.windowID);
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break;
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case SDL_EVENT_FINGER_DOWN:
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{
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SDL_Window *window = SDL_GetWindowFromEvent(&event);
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if (SDL_TextInputActive(window)) {
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SDL_Log("Stopping text input for window %" SDL_PRIu32 "\n", event.tfinger.windowID);
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SDL_StopTextInput(window);
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} else {
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SDL_Log("Starting text input for window %" SDL_PRIu32 "\n", event.tfinger.windowID);
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SDL_StartTextInput(window);
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}
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break;
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}
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case SDL_EVENT_MOUSE_BUTTON_DOWN:
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if (event.button.button == SDL_BUTTON_RIGHT) {
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SDL_Window *window = SDL_GetWindowFromEvent(&event);
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if (SDL_TextInputActive(window)) {
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SDL_Log("Stopping text input for window %" SDL_PRIu32 "\n", event.button.windowID);
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SDL_StopTextInput(window);
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} else {
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SDL_Log("Starting text input for window %" SDL_PRIu32 "\n", event.button.windowID);
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SDL_StartTextInput(window);
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}
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}
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break;
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case SDL_EVENT_KEYMAP_CHANGED:
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SDL_Log("Keymap changed!\n");
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break;
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case SDL_EVENT_QUIT:
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done = 1;
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break;
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default:
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break;
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}
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}
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now = SDL_GetTicks();
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for (i = 0; i < state->num_windows; i++) {
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char caption[1024];
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/* Clear the window */
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SDL_SetRenderDrawColor(state->renderers[i], 0, 0, 0, 255);
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SDL_RenderClear(state->renderers[i]);
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/* Draw the text */
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SDL_SetRenderDrawColor(state->renderers[i], 255, 255, 255, 255);
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SDL_snprintf(caption, sizeof(caption), "Text input %s (click right mouse button to toggle)\n", SDL_TextInputActive(state->windows[i]) ? "enabled" : "disabled");
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SDLTest_DrawString(state->renderers[i], TEXT_WINDOW_OFFSET_X, TEXT_WINDOW_OFFSET_X, caption);
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SDLTest_TextWindowDisplay(windowstates[i].textwindow, state->renderers[i]);
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/* Draw the cursor */
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if ((now - last_cursor_change) >= CURSOR_BLINK_INTERVAL_MS) {
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cursor_visible = !cursor_visible;
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last_cursor_change = now;
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}
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if (cursor_visible) {
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DrawCursor(i);
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}
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/* Draw the composition text */
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DrawEditText(i);
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SDL_RenderPresent(state->renderers[i]);
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}
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/* Slow down framerate */
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SDL_Delay(100);
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#ifdef SDL_PLATFORM_EMSCRIPTEN
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if (done) {
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emscripten_cancel_main_loop();
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}
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#endif
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}
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int main(int argc, char *argv[])
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{
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int i;
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SDL_SetHint(SDL_HINT_WINDOWS_RAW_KEYBOARD, "1");
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/* Initialize test framework */
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state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
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if (!state) {
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return 1;
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}
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state->window_title = "CheckKeys Test";
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/* Parse commandline */
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if (!SDLTest_CommonDefaultArgs(state, argc, argv)) {
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return 1;
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}
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/* Disable mouse emulation */
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SDL_SetHint(SDL_HINT_TOUCH_MOUSE_EVENTS, "0");
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/* Initialize SDL */
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if (!SDLTest_CommonInit(state)) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return 1;
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}
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windowstates = (TextWindowState *)SDL_calloc(state->num_windows, sizeof(*windowstates));
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if (!windowstates) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't allocate text windows: %s\n", SDL_GetError());
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goto done;
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}
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for (i = 0; i < state->num_windows; ++i) {
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int w, h;
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SDL_FRect rect;
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SDL_GetWindowSize(state->windows[i], &w, &h);
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rect.x = TEXT_WINDOW_OFFSET_X;
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rect.y = TEXT_WINDOW_OFFSET_Y;
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rect.w = w - (2 * TEXT_WINDOW_OFFSET_X);
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rect.h = h - TEXT_WINDOW_OFFSET_Y;
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windowstates[i].textwindow = SDLTest_TextWindowCreate(rect.x, rect.y, rect.w, rect.h);
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}
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#ifdef SDL_PLATFORM_IOS
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{
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/* Creating the context creates the view, which we need to show keyboard */
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for (i = 0; i < state->num_windows; i++) {
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SDL_GL_CreateContext(state->windows[i]);
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}
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}
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#endif
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for (i = 0; i < state->num_windows; ++i) {
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UpdateTextWindowInputRect(SDL_GetWindowID(state->windows[i]));
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SDL_StartTextInput(state->windows[i]);
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}
|
|
|
|
/* Print initial state */
|
|
SDL_PumpEvents();
|
|
PrintModifierState();
|
|
|
|
/* Watch keystrokes */
|
|
done = 0;
|
|
|
|
#ifdef SDL_PLATFORM_EMSCRIPTEN
|
|
emscripten_set_main_loop(loop, 0, 1);
|
|
#else
|
|
while (!done) {
|
|
loop();
|
|
}
|
|
#endif
|
|
|
|
done:
|
|
if (windowstates) {
|
|
for (i = 0; i < state->num_windows; ++i) {
|
|
SDLTest_TextWindowDestroy(windowstates[i].textwindow);
|
|
}
|
|
SDL_free(windowstates);
|
|
}
|
|
SDLTest_CleanupTextDrawing();
|
|
SDLTest_CommonQuit(state);
|
|
return 0;
|
|
}
|