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/*
SCREENShowCursorHelper.c
AUTHORS:
Allen.Ingling@nyu.edu awi
mario.kleiner@tuebingen.mpg.de mk
PLATFORMS:
All.
HISTORY:
12/14/02 awi Created.
10/12/04 awi Changed "SCREEN" to "Screen" in useString. Added ShowCursor to see also. Fixed inappropriate "HideCursor" in this file.
11/16/04 awi Added "Helper" suffix.
DESCRIPTION:
Hides the mouse pointer
TO DO:
The showcursor.m script should be modified to invoke hidecursor through screen only on OS X. Otherwise it is a
separate mex file.
If we store a pointer to the window and screen lists in shared memory (accessible between mex files) then
we could implement this a a seperate mex file. Seems more natural to do it from SCREEN though. Let's wait and
see what Windows and Linux are like before changeing it to a separate mex file.
*/
#include "Screen.h"
#if PSYCH_SYSTEM == PSYCH_LINUX
#include <X11/X.h>
#include <X11/cursorfont.h>
#endif
// If you change the useString then also change the corresponding synopsis string in ScreenSynopsis.c
static char useString[] = "Screen('ShowCursorHelper', screenIndex [, cursorshapeid][, mouseIndex]);";
// 1 2
static char synopsisString[] =
"This is a helper function called by ShowCursor. Do not call Screen(\'ShowCursorHelper\'), use "
"ShowCursor instead.\n"
"Show the mouse pointer. If optional 'cursorshapeid' is given, select a specific cursor shape as well.\n"
"If optional 'mouseIndex' is given, setup cursor for given master mouseIndex device (Linux only).\n";
static char seeAlsoString[] = "HideCursorHelper";
PsychError SCREENShowCursorHelper(void)
{
int screenNumber, cursorid, mouseIdx;
#if PSYCH_SYSTEM == PSYCH_LINUX
Cursor mycursor;
#endif
//all subfunctions should have these two lines.
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
PsychErrorExit(PsychCapNumInputArgs(3)); //The maximum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(0)); //The maximum number of outputs
PsychCopyInScreenNumberArg(1, TRUE, &screenNumber);
mouseIdx = -1;
PsychCopyInIntegerArg(3, FALSE, &mouseIdx);
PsychShowCursor(screenNumber, mouseIdx);
// Copy in optional cursor shape id argument: The default of -1 means to
// not change cursor appearance. Any other positive value changes to an
// OS dependent shape (== the mapping of numbers to shapes is OS dependent).
cursorid = -1;
PsychCopyInIntegerArg(2, FALSE, &cursorid);
// Cursor change request?
if (cursorid!=-1) {
// Yes.
#if PSYCH_SYSTEM == PSYCH_OSX
// OS/X:
SetThemeCursor((ThemeCursor) cursorid);
#endif
#if PSYCH_SYSTEM == PSYCH_LINUX
// GNU/Linux with X11 windowing system:
// Map screenNumber to X11 display handle and screenid:
CGDirectDisplayID dpy;
PsychGetCGDisplayIDFromScreenNumber(&dpy, screenNumber);
// Create cursor spec from passed cursorid:
mycursor = XCreateFontCursor(dpy, (unsigned int) cursorid);
if (mouseIdx < 0) {
// Set cursor for our window:
PsychOSDefineX11Cursor(screenNumber, -1, mycursor);
} else {
// XInput cursor: Master pointers only.
int nDevices;
XIDeviceInfo* indevs = PsychGetInputDevicesForScreen(screenNumber, &nDevices);
// Sanity check:
if (NULL == indevs) PsychErrorExitMsg(PsychError_user, "Sorry, your system does not support individual mouse pointers.");
if (mouseIdx >= nDevices) PsychErrorExitMsg(PsychError_user, "Invalid 'mouseIndex' provided. No such cursor pointer.");
if (indevs[mouseIdx].use != XIMasterPointer) PsychErrorExitMsg(PsychError_user, "Invalid 'mouseIndex' provided. No such master cursor pointer.");
PsychOSDefineX11Cursor(screenNumber, indevs[mouseIdx].deviceid, mycursor);
}
XFlush(dpy);
// Done (hopefully).
#endif
#if PSYCH_SYSTEM == PSYCH_WINDOWS
// Microsoft Windows:
LPCTSTR lpCursorName;
#ifndef IDC_HAND
#define IDC_HAND MAKEINTRESOURCE(32649)
#endif
// Map provided cursor id to a Windows system id for such a cursor:
switch(cursorid) {
case 0:
// Standard arrow cursor:
lpCursorName = IDC_ARROW;
break;
case 1:
// haircross cursor:
lpCursorName = IDC_CROSS;
break;
case 2:
// hand cursor:
lpCursorName = IDC_HAND;
break;
case 3:
// Arrows in all 4 directions cursor:
lpCursorName = IDC_SIZEALL;
break;
case 4:
// north-south cursor:
lpCursorName = IDC_SIZENS;
break;
case 5:
// east-west cursor:
lpCursorName = IDC_SIZEWE;
break;
case 6:
// hourglass cursor:
lpCursorName = IDC_WAIT;
break;
case 7:
// No cursor:
lpCursorName = IDC_NO;
break;
default:
// Default for unknown id is the standard arrow cursor:
lpCursorName = IDC_ARROW;
}
// Load and set a cursor, based on the selected lpCursorName cursor id string:
SetCursor(LoadCursor(NULL, lpCursorName));
#endif
// End of cursor shape setup.
}
return(PsychError_none);
}
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