| [AD] Updated exjoy.c (joystick example) |
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Hello,
I updated exjoy.c to show all joystick axis in analog mode.
Previously, only Stick 0 Axis 0 and 1 values were shown.
Also made cosmetic and positionning changes to save space on
screen due to the additionnal printing (eg: buttons are now all
printed on the same line).
Omar Cornut
(I made this modification to help debugging a DirectInput
driver bug, about which I'll submit another patch soon).
--- exjoy.c.old 2003-11-09 19:43:08.000000000 +0000
+++ exjoy.c 2004-02-10 17:26:34.000000000 +0000
@@ -18,6 +18,7 @@
int x=160, y=100; /* these will be used to show the target sight */
int analogmode;
AL_CONST char *msg;
+ char buf[MAX_JOYSTICK_BUTTONS * 4 + 1];
int c;
if (allegro_init() != 0)/* you NEED this man! ;-) */
@@ -123,6 +124,7 @@
textout_centre_ex(bmp, font, joystick_driver->name, 160, 150, palette_color[255], 0);
+ /* display bottom information */
if (analogmode)
textout_centre_ex(bmp, font, "Analog mode selected", 160, 160, palette_color[255], 0);
else
@@ -132,62 +134,95 @@
textout_centre_ex(bmp, font, "Press any key to exit", 160, 180, palette_color[255], 0);
textout_centre_ex(bmp, font, "Made by Grzegorz Adam Hankiewicz", 160, 190, palette_color[255], 0);
- /* if we detect any buttons, we print a message on the screen */
+ /* create a message showing all pressed buttons, by appending them all
+ * into a string buffer, then print the message on the screen
+ */
+ buf[0] = '\0';
for (c=0; c<joy[0].num_buttons; c++) {
- if (joy[0].button[c].b)
- textprintf_centre_ex(bmp, font, 160, c*10, palette_color[15], 0, "%s pressed", joy[0].button[c].name);
+ if (joy[0].button[c].b) {
+ char buf_button[16];
+ sprintf(buf_button, "%d ", c);
+ strcat(buf, buf_button);
+ }
}
+ textprintf_ex(bmp, font, 0, 10, palette_color[15], 0, "Buttons pressed:");
+ textprintf_ex(bmp, font, 0, 20, palette_color[15], 0, " %s", (buf[0] != '\0') ? buf : "none");
if (!analogmode) {
- /* now we have to check individually every possible movement
+ /* draw cross (this is one ugly drawing) */
+ textout_centre_ex(bmp, font, "|", 160, 70, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "---", 160, 80, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "|", 160, 90, palette_color[255], 0);
+
+ /* now we have to check individually every possible movement
* and actualize the coordinates of the target sight.
*/
if (joy[0].stick[0].axis[0].d1) {
if (x > 0)
x--;
- textout_centre_ex(bmp, font, "Left", 120, 100, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "Left", 120, 80, palette_color[255], 0);
}
if (joy[0].stick[0].axis[0].d2) {
if (x < 319)
x++;
- textout_centre_ex(bmp, font, "Right", 200, 100, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "Right", 200, 80, palette_color[255], 0);
}
if (joy[0].stick[0].axis[1].d1) {
if (y > 0)
y--;
- textout_centre_ex(bmp, font, "Up", 160, 70, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "Up", 160, 50, palette_color[255], 0);
}
if (joy[0].stick[0].axis[1].d2) {
if (y < 199)
y++;
- textout_centre_ex(bmp, font, "Down", 160, 130, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "Down", 160, 110, palette_color[255], 0);
}
}
else {
+ int stick_n;
+ int line_n;
+
/* yeah! Remember the 'ifs' of the digital part? This looks
* much better, only 2 lines.
+ * note that only the standard horizontal/vertical axis of stick 0 are shown here.
*/
x += joy[0].stick[0].axis[0].pos/40;
y += joy[0].stick[0].axis[1].pos/40;
- /* for informational purposes, show the input values on screen */
- textprintf_ex(bmp, font, 0, 0, palette_color[255], 0, "Axis 0: %d", joy[0].stick[0].axis[0].pos);
- textprintf_ex(bmp, font, 0, 10, palette_color[255], 0, "Axis 1: %d", joy[0].stick[0].axis[1].pos);
+ /* for informational purposes, show the input values on screen.
+ * all sticks, and then all their axis values are displayed.
+ */
+ textprintf_ex(bmp, font, 0, 30, palette_color[15], 0, "Axis:");
+ line_n = 0;
+ for (stick_n = 0; stick_n < joy[0].num_sticks; stick_n++) {
+ JOYSTICK_STICK_INFO *stick = &joy[0].stick[stick_n];
+ int axis_n;
+ for (axis_n = 0; axis_n < stick->num_axis; axis_n++) {
+ JOYSTICK_AXIS_INFO *axis = &stick->axis[axis_n];
+ textprintf_ex(bmp, font, 0, 40 + (line_n * 10), palette_color[255], 0, " stick %d axis %d: %d", stick_n, axis_n, axis->pos);
+ line_n++;
+ }
+ }
+
+ /* draw cross (this is one ugly drawing) */
+ textout_centre_ex(bmp, font, "|", 240, 40, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "---", 240, 50, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "|", 240, 60, palette_color[255], 0);
/* by checking if the values were positive or negative, we
* can know in which the direction the user pulled the joy.
*/
- if (joy[0].stick[0].axis[0].pos/40 < 0)
- textout_centre_ex(bmp, font, "Left", 120, 100, palette_color[255], 0);
+ if (joy[0].stick[0].axis[0].pos/40 < 0)
+ textout_centre_ex(bmp, font, "Left", 200, 50, palette_color[255], 0);
if (joy[0].stick[0].axis[0].pos/40 > 0)
- textout_centre_ex(bmp, font, "Right", 200, 100, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "Right", 280, 50, palette_color[255], 0);
if (joy[0].stick[0].axis[1].pos/40 < 0)
- textout_centre_ex(bmp, font, "Up", 160, 70, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "Up", 240, 20, palette_color[255], 0);
if (joy[0].stick[0].axis[1].pos/40 > 0)
- textout_centre_ex(bmp, font, "Down", 160, 130, palette_color[255], 0);
+ textout_centre_ex(bmp, font, "Down", 240, 80, palette_color[255], 0);
/* WARNING! An analog joystick can move more than 1 pixel at
* a time and the checks we did with the digital part don't