bindings pop-up menu

3 files changed, 84 insertions, 3 deletions

diff --git a/demo.c b/demo.c
index 2fa041c..d8238c9 100644
--- a/demo.c
+++ b/demo.c
@@ -1,10 +1,11 @@
 #include "lzr.h"
+#include <SDL2/SDL_scancode.h>
 #include <dx/log.h>
 #include <stdbool.h>
 
 int main(void)
 {
-	LZR_Config cfg = {400, 224, 60, 16, "LZR demo"};
+	LZR_Config cfg = {400, 224, 60, 16, "LZR demo", false};
 	if (LZR_Init(cfg))
 		return 1;
 	LZR_ImageLoad("coucou.bmp");
diff --git a/lzr.c b/lzr.c
index edf9d17..bd48b55 100644
--- a/lzr.c
+++ b/lzr.c
@@ -7,8 +7,10 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <string.h>
+#include <unistd.h>
 
-#define UNPACKED_COLOR color[0], color[1], color[2]
+#define UNPACKED_COLOR  color[0], color[1], color[2]
+#define SCODE_BIND_MENU SDL_SCANCODE_F1
 
 static LZR_Config config = {0};
 static char *basepath = NULL;
@@ -56,6 +58,80 @@ static int _scode_to_button(unsigned int scode)
 	return -1;
 }
 
+static void _draw_btn(SDL_Renderer *ren, int btn, int x, int y,
+                      unsigned int size)
+{
+	const unsigned int size_2thirds = size * 2 / 3;
+	switch (btn) {
+	case LZR_BUTTON_LEFT:
+		filledTrigonRGBA(ren, x - size / 2, y, x + size / 2,
+		                 y + size_2thirds, x + size / 2,
+		                 y - size_2thirds, 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_RIGHT:
+		filledTrigonRGBA(ren, x + size / 2, y, x - size / 2,
+		                 y + size_2thirds, x - size / 2,
+		                 y - size_2thirds, 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_UP:
+		filledTrigonRGBA(ren, x, y - size / 2, x - size_2thirds,
+		                 y + size / 2, x + size_2thirds, y + size / 2,
+		                 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_DOWN:
+		filledTrigonRGBA(ren, x, y + size / 2, x - size_2thirds,
+		                 y - size / 2, x + size_2thirds, y - size / 2,
+		                 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_O:
+		filledCircleRGBA(ren, x, y, size * 2 / 3, 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_X:
+		thickLineRGBA(ren, x - size / 2, y - size / 2, x + size / 2,
+		              y + size / 2, size / 16 + 1, 0, 0, 0, 255);
+		thickLineRGBA(ren, x + size / 2, y - size / 2, x - size / 2,
+		              y + size / 2, size / 16 + 1, 0, 0, 0, 255);
+		break;
+	default:
+		break;
+	}
+}
+
+static void _bind_menu(void)
+{
+	dx_log_trace("entering bind menu");
+	SDL_Window *win = NULL;
+	SDL_Renderer *ren = NULL;
+	if (SDL_CreateWindowAndRenderer(256, 256, 0, &win, &ren) < 0) {
+		dx_log_error("%s", SDL_GetError());
+		return;
+	}
+	int btn = 0;
+	SDL_Event e;
+	while (btn < LZR_BUTTON_COUNT) {
+		while (SDL_PollEvent(&e)) {
+			if (e.type != SDL_KEYDOWN || e.key.repeat ||
+			    e.key.keysym.scancode == SCODE_BIND_MENU)
+				continue;
+			if (e.key.keysym.scancode == SDL_SCANCODE_ESCAPE ||
+			    e.type == SDL_QUIT)
+				goto exit_bind_menu;
+			LZR_ButtonBind(btn, e.key.keysym.scancode);
+			btn++;
+		}
+		SDL_SetRenderDrawColor(ren, 220, 220, 200, 255);
+		SDL_RenderClear(ren);
+		SDL_SetRenderDrawColor(ren, 0, 0, 0, 255);
+		_draw_btn(ren, btn, 128, 128, 104);
+		SDL_RenderPresent(ren);
+		sleep(0);
+	}
+exit_bind_menu:
+	SDL_DestroyRenderer(ren);
+	SDL_DestroyWindow(win);
+	dx_log_trace("leaving bind menu");
+}
+
 int LZR_Init(LZR_Config cfg)
 {
 	memcpy(&config, &cfg, sizeof(config));
@@ -193,6 +269,9 @@ bool LZR_PollEvent(LZR_Event *e)
 			return true;
 		case SDL_KEYDOWN: {
 			const int b = _scode_to_button(se.key.keysym.scancode);
+			if (!config.disable_bind_menu &&
+			    se.key.keysym.scancode == SCODE_BIND_MENU)
+				_bind_menu();
 			if (se.key.repeat || b < 0)
 				break;
 			e->type = LZR_EVENT_BUTTON_DOWN;
@@ -232,7 +311,7 @@ bool LZR_ButtonDown(LZR_Button btn)
 
 void LZR_ButtonBind(LZR_Button btn, unsigned int code)
 {
-	if (btn < LZR_BUTTON_COUNT) {
+	if (btn < LZR_BUTTON_COUNT && code != SCODE_BIND_MENU) {
 		map[btn] = code;
 		dx_log_trace("bound key %s to button %u",
 		             SDL_GetScancodeName(map[btn]), btn);
diff --git a/lzr.h b/lzr.h
index 1d44dbe..b62ca41 100644
--- a/lzr.h
+++ b/lzr.h
@@ -10,6 +10,7 @@ typedef struct LZR_Config {
 	unsigned int target_fps;
 	unsigned int tile_size;
 	const char *title;
+	bool disable_bind_menu;
 } LZR_Config;
 
 typedef enum LZR_EventType {