🛠️🐜 Antkeeper superbuild with dependencies included
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
298 lines
7.8 KiB
298 lines
7.8 KiB
/*
|
|
Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely.
|
|
*/
|
|
|
|
#include "SDL.h"
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
#include <emscripten/emscripten.h>
|
|
#endif
|
|
|
|
#include <stdlib.h> /* exit() */
|
|
|
|
#ifdef __IPHONEOS__
|
|
#define SCREEN_WIDTH 320
|
|
#define SCREEN_HEIGHT 480
|
|
#else
|
|
#define SCREEN_WIDTH 640
|
|
#define SCREEN_HEIGHT 480
|
|
#endif
|
|
|
|
static SDL_Window *window;
|
|
|
|
typedef struct _Object
|
|
{
|
|
struct _Object *next;
|
|
|
|
int x1, y1, x2, y2;
|
|
Uint8 r, g, b;
|
|
|
|
SDL_bool isRect;
|
|
} Object;
|
|
|
|
static Object *active = NULL;
|
|
static Object *objects = NULL;
|
|
static int buttons = 0;
|
|
static SDL_bool isRect = SDL_FALSE;
|
|
|
|
static SDL_bool wheel_x_active = SDL_FALSE;
|
|
static SDL_bool wheel_y_active = SDL_FALSE;
|
|
static float wheel_x = SCREEN_WIDTH * 0.5f;
|
|
static float wheel_y = SCREEN_HEIGHT * 0.5f;
|
|
|
|
static SDL_bool done = SDL_FALSE;
|
|
|
|
void DrawObject(SDL_Renderer *renderer, Object *object)
|
|
{
|
|
SDL_SetRenderDrawColor(renderer, object->r, object->g, object->b, 255);
|
|
|
|
if (object->isRect) {
|
|
SDL_Rect rect;
|
|
|
|
if (object->x1 > object->x2) {
|
|
rect.x = object->x2;
|
|
rect.w = object->x1 - object->x2;
|
|
} else {
|
|
rect.x = object->x1;
|
|
rect.w = object->x2 - object->x1;
|
|
}
|
|
|
|
if (object->y1 > object->y2) {
|
|
rect.y = object->y2;
|
|
rect.h = object->y1 - object->y2;
|
|
} else {
|
|
rect.y = object->y1;
|
|
rect.h = object->y2 - object->y1;
|
|
}
|
|
|
|
/* SDL_RenderDrawRect(renderer, &rect); */
|
|
SDL_RenderFillRect(renderer, &rect);
|
|
} else {
|
|
SDL_RenderDrawLine(renderer, object->x1, object->y1, object->x2, object->y2);
|
|
}
|
|
}
|
|
|
|
void DrawObjects(SDL_Renderer *renderer)
|
|
{
|
|
Object *next = objects;
|
|
while (next != NULL) {
|
|
DrawObject(renderer, next);
|
|
next = next->next;
|
|
}
|
|
}
|
|
|
|
void AppendObject(Object *object)
|
|
{
|
|
if (objects) {
|
|
Object *next = objects;
|
|
while (next->next != NULL) {
|
|
next = next->next;
|
|
}
|
|
next->next = object;
|
|
} else {
|
|
objects = object;
|
|
}
|
|
}
|
|
|
|
void loop(void *arg)
|
|
{
|
|
SDL_Renderer *renderer = (SDL_Renderer *)arg;
|
|
SDL_Event event;
|
|
|
|
/* Check for events */
|
|
while (SDL_PollEvent(&event)) {
|
|
switch (event.type) {
|
|
case SDL_MOUSEWHEEL:
|
|
if (event.wheel.direction == SDL_MOUSEWHEEL_FLIPPED) {
|
|
event.wheel.preciseX *= -1.0f;
|
|
event.wheel.preciseY *= -1.0f;
|
|
event.wheel.x *= -1;
|
|
event.wheel.y *= -1;
|
|
}
|
|
if (event.wheel.preciseX != 0.0f) {
|
|
wheel_x_active = SDL_TRUE;
|
|
/* "positive to the right and negative to the left" */
|
|
wheel_x += event.wheel.preciseX * 10.0f;
|
|
}
|
|
if (event.wheel.preciseY != 0.0f) {
|
|
wheel_y_active = SDL_TRUE;
|
|
/* "positive away from the user and negative towards the user" */
|
|
wheel_y -= event.wheel.preciseY * 10.0f;
|
|
}
|
|
break;
|
|
|
|
case SDL_MOUSEMOTION:
|
|
if (active == NULL) {
|
|
break;
|
|
}
|
|
|
|
active->x2 = event.motion.x;
|
|
active->y2 = event.motion.y;
|
|
break;
|
|
|
|
case SDL_MOUSEBUTTONDOWN:
|
|
if (active == NULL) {
|
|
active = SDL_calloc(1, sizeof(*active));
|
|
active->x1 = active->x2 = event.button.x;
|
|
active->y1 = active->y2 = event.button.y;
|
|
active->isRect = isRect;
|
|
}
|
|
|
|
switch (event.button.button) {
|
|
case SDL_BUTTON_LEFT:
|
|
active->r = 255;
|
|
buttons |= SDL_BUTTON_LMASK;
|
|
break;
|
|
case SDL_BUTTON_MIDDLE:
|
|
active->g = 255;
|
|
buttons |= SDL_BUTTON_MMASK;
|
|
break;
|
|
case SDL_BUTTON_RIGHT:
|
|
active->b = 255;
|
|
buttons |= SDL_BUTTON_RMASK;
|
|
break;
|
|
case SDL_BUTTON_X1:
|
|
active->r = 255;
|
|
active->b = 255;
|
|
buttons |= SDL_BUTTON_X1MASK;
|
|
break;
|
|
case SDL_BUTTON_X2:
|
|
active->g = 255;
|
|
active->b = 255;
|
|
buttons |= SDL_BUTTON_X2MASK;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case SDL_MOUSEBUTTONUP:
|
|
if (active == NULL) {
|
|
break;
|
|
}
|
|
|
|
switch (event.button.button) {
|
|
case SDL_BUTTON_LEFT:
|
|
buttons &= ~SDL_BUTTON_LMASK;
|
|
break;
|
|
case SDL_BUTTON_MIDDLE:
|
|
buttons &= ~SDL_BUTTON_MMASK;
|
|
break;
|
|
case SDL_BUTTON_RIGHT:
|
|
buttons &= ~SDL_BUTTON_RMASK;
|
|
break;
|
|
case SDL_BUTTON_X1:
|
|
buttons &= ~SDL_BUTTON_X1MASK;
|
|
break;
|
|
case SDL_BUTTON_X2:
|
|
buttons &= ~SDL_BUTTON_X2MASK;
|
|
break;
|
|
}
|
|
|
|
if (buttons == 0) {
|
|
AppendObject(active);
|
|
active = NULL;
|
|
}
|
|
break;
|
|
|
|
case SDL_KEYDOWN:
|
|
case SDL_KEYUP:
|
|
switch (event.key.keysym.sym) {
|
|
case SDLK_LSHIFT:
|
|
isRect = (event.key.state == SDL_PRESSED);
|
|
if (active) {
|
|
active->isRect = isRect;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case SDL_QUIT:
|
|
done = SDL_TRUE;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
|
|
SDL_RenderClear(renderer);
|
|
|
|
/* Mouse wheel */
|
|
SDL_SetRenderDrawColor(renderer, 0, 255, 128, 255);
|
|
if (wheel_x_active) {
|
|
SDL_RenderDrawLine(renderer, (int)wheel_x, 0, (int)wheel_x, SCREEN_HEIGHT);
|
|
}
|
|
if (wheel_y_active) {
|
|
SDL_RenderDrawLine(renderer, 0, (int)wheel_y, SCREEN_WIDTH, (int)wheel_y);
|
|
}
|
|
|
|
/* Objects from mouse clicks */
|
|
DrawObjects(renderer);
|
|
if (active) {
|
|
DrawObject(renderer, active);
|
|
}
|
|
|
|
SDL_RenderPresent(renderer);
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
if (done) {
|
|
emscripten_cancel_main_loop();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
SDL_Renderer *renderer;
|
|
|
|
/* Enable standard application logging */
|
|
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
|
|
|
|
/* Initialize SDL (Note: video is required to start event loop) */
|
|
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
|
|
exit(1);
|
|
}
|
|
|
|
/* Create a window to display joystick axis position */
|
|
window = SDL_CreateWindow("Mouse Test", SDL_WINDOWPOS_CENTERED,
|
|
SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH,
|
|
SCREEN_HEIGHT, 0);
|
|
if (window == NULL) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create window: %s\n", SDL_GetError());
|
|
return SDL_FALSE;
|
|
}
|
|
|
|
renderer = SDL_CreateRenderer(window, -1, 0);
|
|
if (renderer == NULL) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create renderer: %s\n", SDL_GetError());
|
|
SDL_DestroyWindow(window);
|
|
return SDL_FALSE;
|
|
}
|
|
|
|
/* Main render loop */
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_set_main_loop_arg(loop, renderer, 0, 1);
|
|
#else
|
|
while (!done) {
|
|
loop(renderer);
|
|
}
|
|
#endif
|
|
|
|
SDL_DestroyRenderer(renderer);
|
|
SDL_DestroyWindow(window);
|
|
|
|
SDL_Quit();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|