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General / SFML and Raw Mouse

« on: April 10, 2009, 06:15:22 pm »

Hi!
We are currently working on a game where we need several mice inputs, and we have planned to do this via rawmouse.
But we have encountered problems in getting the LPARAM needed for the function add_to_raw_mouse_x_and_y(HANDLE in_device_handle).

Code: [Select]

BOOL add_to_raw_mouse_x_and_y(HANDLE in_device_handle)
{
// When the WM_INPUT message is received, the lparam must be passed to this function to keep a running tally of
//     every mouse moves to maintain accurate results for get_raw_mouse_?_delta().
// This function will take the HANDLE of the device and find the device in the raw_mice arrayand add the
//      x and y mousemove values according to the information stored in the RAWINPUT structure.

LPBYTE lpb;
int dwSize;

if (/* GetRawInputData */(*_GRID)((HRAWINPUT)in_device_handle, RID_INPUT, NULL, &dwSize, sizeof(RAWINPUTHEADER)) == -1) {
fprintf(stderr, "ERROR: Unable to add to get size of raw input header.\n");
return 0;
}

lpb = (LPBYTE)malloc(sizeof(LPBYTE) * dwSize);
if (lpb == NULL) {
fprintf(stderr, "ERROR: Unable to allocate memory for raw input header.\n");
return 0;
}
 
if (/* GetRawInputData */(*_GRID)((HRAWINPUT)in_device_handle, RID_INPUT, lpb, &dwSize, sizeof(RAWINPUTHEADER)) != dwSize ) {
fprintf(stderr, "ERROR: Unable to add to get raw input header.\n");
return 0;
}

read_raw_input((RAWINPUT*)lpb);

free(lpb);

return 1;
}

We think that we need a device handle to pass to the function, we have tried the window handle and the LPARAM from the mouse event.

Does anybody know how to get it to work?