test/testjoystick.c
changeset 0 74212992fb08
child 1661 281d3f4870e5
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/testjoystick.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,178 @@
+
+/* Simple program to test the SDL joystick routines */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL.h"
+
+#define SCREEN_WIDTH	640
+#define SCREEN_HEIGHT	480
+
+void WatchJoystick(SDL_Joystick *joystick)
+{
+	SDL_Surface *screen;
+	const char *name;
+	int i, done;
+	SDL_Event event;
+	int x, y, draw;
+	SDL_Rect axis_area[2];
+
+	/* Set a video mode to display joystick axis position */
+	screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, 16, 0);
+	if ( screen == NULL ) {
+		fprintf(stderr, "Couldn't set video mode: %s\n",SDL_GetError());
+		return;
+	}
+
+	/* Print info about the joystick we are watching */
+	name = SDL_JoystickName(SDL_JoystickIndex(joystick));
+	printf("Watching joystick %d: (%s)\n", SDL_JoystickIndex(joystick),
+	       name ? name : "Unknown Joystick");
+	printf("Joystick has %d axes, %d hats, %d balls, and %d buttons\n",
+	       SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick),
+	       SDL_JoystickNumBalls(joystick),SDL_JoystickNumButtons(joystick));
+
+	/* Initialize drawing rectangles */
+	memset(axis_area, 0, (sizeof axis_area));
+	draw = 0;
+
+	/* Loop, getting joystick events! */
+	done = 0;
+	while ( ! done ) {
+		while ( SDL_PollEvent(&event) ) {
+			switch (event.type) {
+			    case SDL_JOYAXISMOTION:
+				printf("Joystick %d axis %d value: %d\n",
+				       event.jaxis.which,
+				       event.jaxis.axis,
+				       event.jaxis.value);
+				break;
+			    case SDL_JOYHATMOTION:
+				printf("Joystick %d hat %d value:",
+				       event.jhat.which,
+				       event.jhat.hat);
+				if ( event.jhat.value == SDL_HAT_CENTERED )
+					printf(" centered");
+				if ( event.jhat.value & SDL_HAT_UP )
+					printf(" up");
+				if ( event.jhat.value & SDL_HAT_RIGHT )
+					printf(" right");
+				if ( event.jhat.value & SDL_HAT_DOWN )
+					printf(" down");
+				if ( event.jhat.value & SDL_HAT_LEFT )
+					printf(" left");
+				printf("\n");
+				break;
+			    case SDL_JOYBALLMOTION:
+				printf("Joystick %d ball %d delta: (%d,%d)\n",
+				       event.jball.which,
+				       event.jball.ball,
+				       event.jball.xrel,
+				       event.jball.yrel);
+				break;
+			    case SDL_JOYBUTTONDOWN:
+				printf("Joystick %d button %d down\n",
+				       event.jbutton.which,
+				       event.jbutton.button);
+				break;
+			    case SDL_JOYBUTTONUP:
+				printf("Joystick %d button %d up\n",
+				       event.jbutton.which,
+				       event.jbutton.button);
+				break;
+			    case SDL_KEYDOWN:
+				if ( event.key.keysym.sym != SDLK_ESCAPE ) {
+					break;
+				}
+				/* Fall through to signal quit */
+			    case SDL_QUIT:
+				done = 1;
+				break;
+			    default:
+				break;
+			}
+		}
+		/* Update visual joystick state */
+		for ( i=0; i<SDL_JoystickNumButtons(joystick); ++i ) {
+			SDL_Rect area;
+
+			area.x = i*34;
+			area.y = SCREEN_HEIGHT-34;
+			area.w = 32;
+			area.h = 32;
+			if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) {
+				SDL_FillRect(screen, &area, 0xFFFF);
+			} else {
+				SDL_FillRect(screen, &area, 0x0000);
+			}
+			SDL_UpdateRects(screen, 1, &area);
+		}
+
+		/* Erase previous axes */
+		SDL_FillRect(screen, &axis_area[draw], 0x0000);
+
+		/* Draw the X/Y axis */
+		draw = !draw;
+		x = (((int)SDL_JoystickGetAxis(joystick, 0))+32768);
+		x *= SCREEN_WIDTH;
+		x /= 65535;
+		if ( x < 0 ) {
+			x = 0;
+		} else
+		if ( x > (SCREEN_WIDTH-16) ) {
+			x = SCREEN_WIDTH-16;
+		}
+		y = (((int)SDL_JoystickGetAxis(joystick, 1))+32768);
+		y *= SCREEN_HEIGHT;
+		y /= 65535;
+		if ( y < 0 ) {
+			y = 0;
+		} else
+		if ( y > (SCREEN_HEIGHT-16) ) {
+			y = SCREEN_HEIGHT-16;
+		}
+		axis_area[draw].x = (Sint16)x;
+		axis_area[draw].y = (Sint16)y;
+		axis_area[draw].w = 16;
+		axis_area[draw].h = 16;
+		SDL_FillRect(screen, &axis_area[draw], 0xFFFF);
+
+		SDL_UpdateRects(screen, 2, axis_area);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	const char *name;
+	int i;
+	SDL_Joystick *joystick;
+
+	/* Initialize SDL (Note: video is required to start event loop) */
+	if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK) < 0 ) {
+		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
+		exit(1);
+	}
+
+	/* Print information about the joysticks */
+	printf("There are %d joysticks attached\n", SDL_NumJoysticks());
+	for ( i=0; i<SDL_NumJoysticks(); ++i ) {
+		name = SDL_JoystickName(i);
+		printf("Joystick %d: %s\n",i,name ? name : "Unknown Joystick");
+	}
+
+	if ( argv[1] ) {
+		joystick = SDL_JoystickOpen(atoi(argv[1]));
+		if ( joystick == NULL ) {
+			printf("Couldn't open joystick %d: %s\n", atoi(argv[1]),
+			       SDL_GetError());
+		} else {
+			WatchJoystick(joystick);
+			SDL_JoystickClose(joystick);
+		}
+	}
+	SDL_QuitSubSystem(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK);
+
+	return(0);
+}