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https://github.com/libsdl-org/SDL.git
synced 2025-06-01 01:17:40 +00:00
Added support for multiple distinct keyboards
This commit is contained in:
Sam Lantinga
parent
78c7834f90
commit
f1f24b173c
5 changed files with 196 additions and 16 deletions
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@ -60,11 +60,56 @@ static const char *arrow[] = {
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"0,0"
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};
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static const char *cross[] = {
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/* width height num_colors chars_per_pixel */
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" 32 32 3 1",
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/* colors */
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"o c #ffffff",
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". c #000000",
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" c None",
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/* pixels */
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" ",
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" ",
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" ",
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" ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oooooooooooooooooooooooo ",
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" oooooooooooooooooooooooo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" oo ",
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" ",
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" ",
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" ",
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" ",
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"0,0"
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};
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static SDLTest_CommonState *state;
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static int done;
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#define PROP_CURSOR_TEXTURE "cursor_texture"
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#define MAX_MICE 3
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#define PROP_ARROW_CURSOR_TEXTURE "arrow_cursor_texture"
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#define PROP_CROSS_CURSOR_TEXTURE "cross_cursor_texture"
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#define MAX_MICE 3
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#define MAX_KEYBOARDS 3
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#define CURSOR_SIZE 48.0f
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#define MAX_TRAIL 500
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#define TRAIL_SIZE 8.0f
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@ -74,7 +119,8 @@ static SDL_Color colors[] = {
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{ 255, 0, 255, 255 }, /* mouse 2, magenta */
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{ 255, 255, 0, 255 }, /* mouse 3, yellow */
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};
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SDL_COMPILE_TIME_ASSERT(colors, SDL_arraysize(colors) == MAX_MICE);
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SDL_COMPILE_TIME_ASSERT(mouse_colors, SDL_arraysize(colors) == MAX_MICE);
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SDL_COMPILE_TIME_ASSERT(keyboard_colors, SDL_arraysize(colors) == MAX_KEYBOARDS);
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typedef struct
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{
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@ -89,7 +135,17 @@ typedef struct
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static MouseState mice[MAX_MICE];
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static SDL_Texture *CreateCursor(const char *image[], SDL_Renderer *renderer)
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typedef struct
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{
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SDL_KeyboardID instance_id;
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SDL_bool active;
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Uint8 button_state;
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SDL_FPoint position;
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} KeyboardState;
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static KeyboardState keyboards[MAX_KEYBOARDS];
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static SDL_Texture *CreateTexture(const char *image[], SDL_Renderer *renderer)
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{
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SDL_Surface *surface;
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SDL_Palette *palette;
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@ -109,6 +165,9 @@ static SDL_Texture *CreateCursor(const char *image[], SDL_Renderer *renderer)
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palette->colors['.'].r = 0xFF;
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palette->colors['.'].g = 0xFF;
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palette->colors['.'].b = 0xFF;
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palette->colors['o'].r = 0xFF;
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palette->colors['o'].g = 0xFF;
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palette->colors['o'].b = 0xFF;
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palette->colors['X'].r = 0x00;
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palette->colors['X'].g = 0x00;
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palette->colors['X'].b = 0x00;
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@ -271,6 +330,115 @@ static void DrawMouseState(SDL_Window *window, SDL_Renderer *renderer, MouseStat
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SDL_RenderTexture(renderer, cursor, NULL, &rect);
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}
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static void HandleKeyboardAdded(SDL_KeyboardID instance_id)
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{
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SDL_Window *window = state->windows[0];
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int i, w = 0, h = 0;
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SDL_GetWindowSize(window, &w, &h);
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for (i = 0; i < SDL_arraysize(keyboards); ++i) {
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KeyboardState *keyboard_state = &keyboards[i];
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if (!keyboard_state->active) {
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keyboard_state->instance_id = instance_id;
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keyboard_state->active = SDL_TRUE;
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keyboard_state->position.x = w * 0.5f;
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keyboard_state->position.y = h * 0.5f;
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return;
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}
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}
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}
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static void HandleKeyboardRemoved(SDL_KeyboardID instance_id)
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{
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int i;
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for (i = 0; i < SDL_arraysize(keyboards); ++i) {
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KeyboardState *keyboard_state = &keyboards[i];
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if (instance_id == keyboard_state->instance_id) {
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SDL_zerop(keyboard_state);
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return;
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}
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}
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}
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static void ActivateKeyboard(SDL_KeyboardID instance_id)
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{
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int i;
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for (i = 0; i < SDL_arraysize(keyboards); ++i) {
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KeyboardState *keyboard_state = &keyboards[i];
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if (keyboard_state->active && instance_id == keyboard_state->instance_id) {
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return;
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}
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}
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HandleKeyboardAdded(instance_id);
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}
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static void HandleKeyboardKeyDown(SDL_KeyboardEvent *event)
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{
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SDL_Window *window = state->windows[0];
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int i, w = 0, h = 0;
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SDL_GetWindowSize(window, &w, &h);
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ActivateKeyboard(event->which);
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for (i = 0; i < SDL_arraysize(keyboards); ++i) {
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KeyboardState *keyboard_state = &keyboards[i];
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if (!keyboard_state->active) {
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continue;
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}
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if (event->which == keyboard_state->instance_id) {
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switch (event->keysym.sym) {
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case SDLK_LEFT:
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keyboard_state->position.x -= CURSOR_SIZE;
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if (keyboard_state->position.x < 0.0f) {
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keyboard_state->position.x = 0.0f;
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}
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break;
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case SDLK_RIGHT:
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keyboard_state->position.x += CURSOR_SIZE;
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if (keyboard_state->position.x > w) {
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keyboard_state->position.x = w;
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}
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break;
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case SDLK_UP:
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keyboard_state->position.y -= CURSOR_SIZE;
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if (keyboard_state->position.y < 0.0f) {
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keyboard_state->position.y = 0.0f;
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}
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break;
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case SDLK_DOWN:
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keyboard_state->position.y += CURSOR_SIZE;
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if (keyboard_state->position.y > h) {
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keyboard_state->position.y = h;
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}
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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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}
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}
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static void DrawKeyboardState(SDL_Window *window, SDL_Renderer *renderer, KeyboardState *keyboard_state, SDL_Texture *cursor, SDL_Color *color)
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{
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SDL_FRect rect;
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if (!keyboard_state->active) {
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return;
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}
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rect.x = keyboard_state->position.x - CURSOR_SIZE / 2;
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rect.y = keyboard_state->position.y - CURSOR_SIZE / 2;
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rect.w = CURSOR_SIZE;
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rect.h = CURSOR_SIZE;
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SDL_SetTextureColorMod(cursor, color->r, color->g, color->b);
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SDL_RenderTexture(renderer, cursor, NULL, &rect);
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}
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static void loop(void)
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{
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int i, j;
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@ -281,6 +449,15 @@ static void loop(void)
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SDLTest_CommonEvent(state, &event, &done);
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switch (event.type) {
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case SDL_EVENT_KEYBOARD_ADDED:
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/* Wait for events before activating this keyboard */
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break;
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case SDL_EVENT_KEYBOARD_REMOVED:
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HandleKeyboardRemoved(event.kdevice.which);
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break;
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case SDL_EVENT_KEY_DOWN:
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HandleKeyboardKeyDown(&event.key);
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break;
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case SDL_EVENT_MOUSE_ADDED:
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/* Wait for events before activating this mouse */
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break;
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@ -302,13 +479,18 @@ static void loop(void)
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for (i = 0; i < state->num_windows; ++i) {
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SDL_Window *window = state->windows[i];
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SDL_Renderer *renderer = state->renderers[i];
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SDL_Texture *cursor = (SDL_Texture *)SDL_GetProperty(SDL_GetRendererProperties(renderer), PROP_CURSOR_TEXTURE, NULL);
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SDL_Texture *arrow_cursor = (SDL_Texture *)SDL_GetProperty(SDL_GetRendererProperties(renderer), PROP_ARROW_CURSOR_TEXTURE, NULL);
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SDL_Texture *cross_cursor = (SDL_Texture *)SDL_GetProperty(SDL_GetRendererProperties(renderer), PROP_CROSS_CURSOR_TEXTURE, NULL);
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SDL_SetRenderDrawColor(renderer, 128, 128, 128, 255);
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SDL_RenderClear(renderer);
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for (j = 0; j < SDL_arraysize(mice); ++j) {
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DrawMouseState(window, renderer, &mice[j], cursor, &colors[j]);
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DrawMouseState(window, renderer, &mice[j], arrow_cursor, &colors[j]);
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}
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for (j = 0; j < SDL_arraysize(keyboards); ++j) {
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DrawKeyboardState(window, renderer, &keyboards[j], cross_cursor, &colors[j]);
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}
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SDL_RenderPresent(renderer);
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@ -349,9 +531,11 @@ int main(int argc, char *argv[])
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/* Create the cursor textures */
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for (i = 0; i < state->num_windows; ++i) {
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SDL_Renderer *renderer = state->renderers[i];
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SDL_Texture *cursor_arrow = CreateTexture(arrow, renderer);
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SDL_Texture *cursor_cross = CreateTexture(cross, renderer);
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SDL_Texture *cursor = CreateCursor(arrow, renderer);
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SDL_SetProperty(SDL_GetRendererProperties(renderer), PROP_CURSOR_TEXTURE, cursor);
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SDL_SetProperty(SDL_GetRendererProperties(renderer), PROP_ARROW_CURSOR_TEXTURE, cursor_arrow);
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SDL_SetProperty(SDL_GetRendererProperties(renderer), PROP_CROSS_CURSOR_TEXTURE, cursor_cross);
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}
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/* We only get mouse motion for distinct devices when relative mode is enabled */
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