test_manymouse_sdl.c
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* A test file for ManyMouse that visualizes input with the SDL library.
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* Simple Directmedia Layer (SDL) can be found at http://libsdl.org/
*
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* Please see the file LICENSE.txt in the source's root directory.
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*
* This file written by Ryan C. Gordon.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include "manymouse.h"
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#include "SDL.h"
#define MAX_MICE 128
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#define SCROLLWHEEL_DISPLAY_TICKS 100
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static int available_mice = 0;
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typedef struct
{
int connected;
int x;
int y;
SDL_Color color;
char name[64];
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Uint32 buttons;
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Uint32 scrolluptick;
Uint32 scrolldowntick;
Uint32 scrolllefttick;
Uint32 scrollrighttick;
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} Mouse;
static Mouse mice[MAX_MICE];
static void update_mice(int screen_w, int screen_h)
{
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ManyMouseEvent event;
while (ManyMouse_PollEvent(&event))
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{
Mouse *mouse;
if (event.device >= (unsigned int) available_mice)
continue;
mouse = &mice[event.device];
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if (event.type == MANYMOUSE_EVENT_RELMOTION)
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{
if (event.item == 0)
mouse->x += event.value;
else if (event.item == 1)
mouse->y += event.value;
}
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else if (event.type == MANYMOUSE_EVENT_ABSMOTION)
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{
float val = (float) (event.value - event.minval);
float maxval = (float) (event.maxval - event.minval);
if (event.item == 0)
mouse->x = (val / maxval) * screen_w;
else if (event.item == 1)
mouse->y = (val / maxval) * screen_h;
}
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else if (event.type == MANYMOUSE_EVENT_BUTTON)
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{
if (event.item < 32)
{
if (event.value)
mouse->buttons |= (1 << event.item);
else
mouse->buttons &= ~(1 << event.item);
}
}
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else if (event.type == MANYMOUSE_EVENT_SCROLL)
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{
if (event.item == 0)
{
if (event.value < 0)
mouse->scrolldowntick = SDL_GetTicks();
else
mouse->scrolluptick = SDL_GetTicks();
}
else if (event.item == 1)
{
if (event.value < 0)
mouse->scrolllefttick = SDL_GetTicks();
else
mouse->scrollrighttick = SDL_GetTicks();
}
}
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else if (event.type == MANYMOUSE_EVENT_DISCONNECT)
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mice[event.device].connected = 0;
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}
}
static void draw_mouse(SDL_Surface *screen, int idx)
{
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int i;
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Uint32 now = SDL_GetTicks();
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Mouse *mouse = &mice[idx];
SDL_Rect r = { mouse->x, mouse->y, 10, 10 };
Uint32 color = SDL_MapRGB(screen->format, mouse->color.r,
mouse->color.g, mouse->color.b);
if (mouse->x < 0) mouse->x = 0;
if (mouse->x >= screen->w) mouse->x = screen->w-1;
if (mouse->y < 0) mouse->y = 0;
if (mouse->y >= screen->h) mouse->y = screen->h-1;
SDL_FillRect(screen, &r, color); /* draw a square for mouse position. */
/* now draw some buttons... */
color = SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF);
for (i = 0; i < 32; i++)
{
if (mouse->buttons & (1 << i)) /* pressed? */
{
r.w = 20;
r.x = i * r.w;
r.h = 20;
r.y = screen->h - ((idx+1) * r.h);
SDL_FillRect(screen, &r, color);
}
}
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/* draw scroll wheels... */
#define DRAW_SCROLLWHEEL(var, item) \
if (var > 0) \
{ \
if ((now - var) > SCROLLWHEEL_DISPLAY_TICKS) \
var = 0; \
else \
{ \
r.w = r.h = 20; \
r.y = idx * r.h; \
r.x = item * r.w; \
SDL_FillRect(screen, &r, color); \
} \
}
DRAW_SCROLLWHEEL(mouse->scrolluptick, 0);
DRAW_SCROLLWHEEL(mouse->scrolldowntick, 1);
DRAW_SCROLLWHEEL(mouse->scrolllefttick, 2);
DRAW_SCROLLWHEEL(mouse->scrollrighttick, 3);
#undef DRAW_SCROLLWHEEL
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}
static void draw_mice(SDL_Surface *screen)
{
int i;
SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0));
for (i = 0; i < available_mice; i++)
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{
if (mice[i].connected)
draw_mouse(screen, i);
}
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SDL_Flip(screen);
}
static void initial_setup(int screen_w, int screen_h)
{
int i;
memset(mice, '\0', sizeof (mice));
/* pick some random colors for each mouse. */
for (i = 0; i < MAX_MICE; i++)
{
Mouse *mouse = &mice[i];
mouse->x = screen_w / 2;
mouse->y = screen_h / 2;
mouse->color.r = (int) (255.0*rand()/(RAND_MAX+1.0));
mouse->color.g = (int) (255.0*rand()/(RAND_MAX+1.0));
mouse->color.b = (int) (255.0*rand()/(RAND_MAX+1.0));
}
}
static void init_mice(void)
{
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available_mice = ManyMouse_Init();
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if (available_mice < 0)
{
printf("Error initializing ManyMouse!\n");
return;
}
printf("ManyMouse driver: %s\n", ManyMouse_DriverName());
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if (available_mice == 0)
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printf("No mice detected!\n");
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return;
}
for (i = 0; i < available_mice; i++)
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const char *name = ManyMouse_DeviceName(i);
printf("#%d: %s\n", i, name);
}
if (available_mice > MAX_MICE)
{
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printf("Clamping to first %d mice.\n", available_mice);
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available_mice = MAX_MICE;
}
for (i = 0; i < available_mice; i++)
{
const char *name = ManyMouse_DeviceName(i);
strncpy(mice[i].name, name, sizeof (mice[i].name));
mice[i].name[sizeof (mice[i].name) - 1] = '\0';
mice[i].connected = 1;
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}
}
int main(int argc, char **argv)
{
int must_quit = 0;
int cursor = 0;
SDL_Surface *screen;
if (SDL_Init(SDL_INIT_VIDEO) == -1)
{
fprintf(stderr, "SDL_Init() failed! %s\n", SDL_GetError());
return 1;
}
screen = SDL_SetVideoMode(640, 480, 0, 0);
if (screen == NULL)
{
fprintf(stderr, "SDL_SetVideoMode() failed! %s\n", SDL_GetError());
SDL_Quit();
return 1;
}
SDL_WM_SetCaption("Move your mice, R to rescan, G to (un)grab, S to show/hide, ESC to quit",
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"manymouse");
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/*SDL_WM_GrabInput(SDL_GRAB_ON);*/
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SDL_ShowCursor(cursor);
initial_setup(screen->w, screen->h);
init_mice();
while (!must_quit)
{
SDL_Event e;
while (SDL_PollEvent(&e))
{
if (e.type == SDL_QUIT)
must_quit = 1;
else if (e.type == SDL_KEYDOWN)
{
if (e.key.keysym.sym == SDLK_ESCAPE)
must_quit = 1;
else if (e.key.keysym.sym == SDLK_g)
{
SDL_GrabMode grab = SDL_WM_GrabInput(SDL_GRAB_QUERY);
grab = (grab == SDL_GRAB_ON) ? SDL_GRAB_OFF : SDL_GRAB_ON;
SDL_WM_GrabInput(grab);
}
else if (e.key.keysym.sym == SDLK_s)
{
cursor = (cursor) ? 0 : 1;
SDL_ShowCursor(cursor);
}
else if (e.key.keysym.sym == SDLK_r)
{
printf("\n\nRESCAN!\n\n");
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ManyMouse_Quit();
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init_mice();
}
}
}
update_mice(screen->w, screen->h);
draw_mice(screen);
}
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ManyMouse_Quit();
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SDL_Quit();
return 0;
}
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/* end of test_manymouse_sdl.c ... */