glut_input.c

来自「mesa-6.5-minigui源码」· C语言 代码 · 共 640 行 · 第 1/2 页

  if (been_here) {
    return support;
  }
  been_here = True;

#if !defined(_WIN32)
  version = XGetExtensionVersion(__glutDisplay, "XInputExtension");
  /* Ugh.  XInput extension API forces annoying cast of a pointer
     to a long so it can be compared with the NoSuchExtension
     value (#defined to 1). */
  if (version == NULL || ((long) version) == NoSuchExtension) {
    support = 0;
    return support;
  }
  XFree(version);
  device_info = XListInputDevices(__glutDisplay, &num_dev);
  if (device_info) {
    for (i = 0; i < num_dev; i++) {
      /* XXX These are SGI names for these devices;
         unfortunately, no good standard exists for standard
         types of X input extension devices. */

      device = &device_info[i];
      any = (XAnyClassPtr) device->inputclassinfo;

      if (!__glutSpaceball && !strcmp(device->name, "spaceball")) {
        v = NULL;
        b = NULL;
        for (j = 0; j < device->num_classes; j++) {
#if defined(__cplusplus) || defined(c_plusplus)
          switch (any->c_class) {
#else
          switch (any->class) {
#endif
          case ButtonClass:
            b = (XButtonInfoPtr) any;
            btns = b->num_buttons;
            break;
          case ValuatorClass:
            v = (XValuatorInfoPtr) any;
            /* Sanity check: at least 6 valuators? */
            if (v->num_axes < NUM_SPACEBALL_AXIS)
              goto skip_device;
            a = (XAxisInfoPtr) ((char *) v + sizeof(XValuatorInfo));
            for (k = 0; k < NUM_SPACEBALL_AXIS; k++, a++) {
              __glutSpaceballRange[k].min = a->min_value;
              __glutSpaceballRange[k].range = a->max_value - a->min_value;
            }
            break;
          }
          any = (XAnyClassPtr) ((char *) any + any->length);
        }
        if (v) {
          __glutSpaceball = XOpenDevice(__glutDisplay, device->id);
          if (__glutSpaceball) {
            __glutNumSpaceballButtons = btns;
            addDeviceEventParser();
          }
        }
      } else if (!__glutDials && !strcmp(device->name, "dial+buttons")) {
        v = NULL;
        b = NULL;
        for (j = 0; j < device->num_classes; j++) {
#if defined(__cplusplus) || defined(c_plusplus)
          switch (any->c_class) {
#else
          switch (any->class) {
#endif
          case ButtonClass:
            b = (XButtonInfoPtr) any;
            btns = b->num_buttons;
            break;
          case ValuatorClass:
            v = (XValuatorInfoPtr) any;
            /* Sanity check: at least 8 valuators? */
            if (v->num_axes < NUM_DIALS_AXIS)
              goto skip_device;
            dials = v->num_axes;
            __glutDialsResolution = (int *) malloc(sizeof(int) * dials);
            a = (XAxisInfoPtr) ((char *) v + sizeof(XValuatorInfo));
            for (k = 0; k < dials; k++, a++) {
              __glutDialsResolution[k] = a->resolution;
            }
            break;
          }
          any = (XAnyClassPtr) ((char *) any + any->length);
        }
        if (v) {
          __glutDials = XOpenDevice(__glutDisplay, device->id);
          if (__glutDials) {
            __glutNumButtonBoxButtons = btns;
            __glutNumDials = dials;
            addDeviceEventParser();
          }
        }
      } else if (!__glutTablet && !strcmp(device->name, "tablet")) {
        v = NULL;
        b = NULL;
        for (j = 0; j < device->num_classes; j++) {
#if defined(__cplusplus) || defined(c_plusplus)
          switch (any->c_class) {
#else
          switch (any->class) {
#endif
          case ButtonClass:
            b = (XButtonInfoPtr) any;
            btns = b->num_buttons;
            break;
          case ValuatorClass:
            v = (XValuatorInfoPtr) any;
            /* Sanity check: exactly 2 valuators? */
            if (v->num_axes != NUM_TABLET_AXIS)
              goto skip_device;
            a = (XAxisInfoPtr) ((char *) v + sizeof(XValuatorInfo));
            for (k = 0; k < NUM_TABLET_AXIS; k++, a++) {
              __glutTabletRange[k].min = a->min_value;
              __glutTabletRange[k].range = a->max_value - a->min_value;
            }
            break;
          }
          any = (XAnyClassPtr) ((char *) any + any->length);
        }
        if (v) {
          __glutTablet = XOpenDevice(__glutDisplay, device->id);
          if (__glutTablet) {
            __glutNumTabletButtons = btns;
            addDeviceEventParser();
          }
        }
      } else if (!strcmp(device->name, "mouse")) {
        for (j = 0; j < device->num_classes; j++) {
#if defined(__cplusplus) || defined(c_plusplus)
          if (any->c_class == ButtonClass) {
#else
          if (any->class == ButtonClass) {
#endif
            b = (XButtonInfoPtr) any;
            __glutNumMouseButtons = b->num_buttons;
          }
          any = (XAnyClassPtr) ((char *) any + any->length);
        }
      }
    skip_device:;
    }
    XFreeDeviceList(device_info);
  }
#else /* _WIN32 */
  __glutNumMouseButtons = GetSystemMetrics(SM_CMOUSEBUTTONS);
#endif /* !_WIN32 */
  /* X Input extension might be supported, but only if there is
     a tablet, dials, or spaceball do we claim devices are
     supported. */
  support = __glutTablet || __glutDials || __glutSpaceball;
  return support;
}

void
__glutUpdateInputDeviceMask(GLUTwindow * window)
{
#if !defined(_WIN32)
  /* 5 (dial and buttons) + 5 (tablet locator and buttons) + 5
     (Spaceball buttons and axis) = 15 */
  XEventClass eventList[15];
  int rc, numEvents;

  rc = probeDevices();
  if (rc) {
    numEvents = 0;
    if (__glutTablet) {
      if (window->tabletMotion) {
        DeviceMotionNotify(__glutTablet, __glutDeviceMotionNotify,
          eventList[numEvents]);
        numEvents++;
      }
      if (window->tabletButton) {
        DeviceButtonPress(__glutTablet, __glutDeviceButtonPress,
          eventList[numEvents]);
        numEvents++;
        DeviceButtonPressGrab(__glutTablet, __glutDeviceButtonPressGrab,
          eventList[numEvents]);
        numEvents++;
        DeviceButtonRelease(__glutTablet, __glutDeviceButtonRelease,
          eventList[numEvents]);
        numEvents++;
      }
      if (window->tabletMotion || window->tabletButton) {
        DeviceStateNotify(__glutTablet, __glutDeviceStateNotify,
          eventList[numEvents]);
        numEvents++;
      }
    }
    if (__glutDials) {
      if (window->dials) {
        DeviceMotionNotify(__glutDials, __glutDeviceMotionNotify,
          eventList[numEvents]);
        numEvents++;
      }
      if (window->buttonBox) {
        DeviceButtonPress(__glutDials, __glutDeviceButtonPress,
          eventList[numEvents]);
        numEvents++;
        DeviceButtonPressGrab(__glutDials, __glutDeviceButtonPressGrab,
          eventList[numEvents]);
        numEvents++;
        DeviceButtonRelease(__glutDials, __glutDeviceButtonRelease,
          eventList[numEvents]);
        numEvents++;
      }
      if (window->dials || window->buttonBox) {
        DeviceStateNotify(__glutDials, __glutDeviceStateNotify,
          eventList[numEvents]);
        numEvents++;
      }
    }
    if (__glutSpaceball) {
      if (window->spaceMotion || window->spaceRotate) {
        DeviceMotionNotify(__glutSpaceball, __glutDeviceMotionNotify,
          eventList[numEvents]);
        numEvents++;
      }
      if (window->spaceButton) {
        DeviceButtonPress(__glutSpaceball, __glutDeviceButtonPress,
          eventList[numEvents]);
        numEvents++;
        DeviceButtonPressGrab(__glutSpaceball, __glutDeviceButtonPressGrab,
          eventList[numEvents]);
        numEvents++;
        DeviceButtonRelease(__glutSpaceball, __glutDeviceButtonRelease,
          eventList[numEvents]);
        numEvents++;
      }
      if (window->spaceMotion || window->spaceRotate || window->spaceButton) {
        DeviceStateNotify(__glutSpaceball, __glutDeviceStateNotify,
          eventList[numEvents]);
        numEvents++;
      }
    }
#if 0
    if (window->children) {
      GLUTwindow *child = window->children;

      do {
        XChangeDeviceDontPropagateList(__glutDisplay, child->win,
          numEvents, eventList, AddToList);
        child = child->siblings;
      } while (child);
    }
#endif
    XSelectExtensionEvent(__glutDisplay, window->win,
      eventList, numEvents);
    if (window->overlay) {
      XSelectExtensionEvent(__glutDisplay, window->overlay->win,
        eventList, numEvents);
    }
  } else {
    /* X Input extension not supported; no chance for exotic
       input devices. */
  }
#endif /* !_WIN32 */
}

/* CENTRY */
int GLUTAPIENTRY
glutDeviceGet(GLenum param)
{
  probeDevices();
  switch (param) {
  case GLUT_HAS_KEYBOARD:
  case GLUT_HAS_MOUSE:
    /* Assume window system always has mouse and keyboard. */
    return 1;
  case GLUT_HAS_SPACEBALL:
    return __glutSpaceball != NULL;
  case GLUT_HAS_DIAL_AND_BUTTON_BOX:
    return __glutDials != NULL;
  case GLUT_HAS_TABLET:
    return __glutTablet != NULL;
  case GLUT_NUM_MOUSE_BUTTONS:
    return __glutNumMouseButtons;
  case GLUT_NUM_SPACEBALL_BUTTONS:
    return __glutNumSpaceballButtons;
  case GLUT_NUM_BUTTON_BOX_BUTTONS:
    return __glutNumButtonBoxButtons;
  case GLUT_NUM_DIALS:
    return __glutNumDials;
  case GLUT_NUM_TABLET_BUTTONS:
    return __glutNumTabletButtons;
  case GLUT_DEVICE_IGNORE_KEY_REPEAT:
    return __glutCurrentWindow->ignoreKeyRepeat;
#ifndef _WIN32
  case GLUT_DEVICE_KEY_REPEAT:
    {
      XKeyboardState state;

      XGetKeyboardControl(__glutDisplay, &state);
      return state.global_auto_repeat;
    }
  case GLUT_JOYSTICK_POLL_RATE:
    return 0;
#else
  case GLUT_DEVICE_KEY_REPEAT:
    /* Win32 cannot globally disable key repeat. */
    return GLUT_KEY_REPEAT_ON;
  case GLUT_JOYSTICK_POLL_RATE:
    return __glutCurrentWindow->joyPollInterval;
#endif
  case GLUT_HAS_JOYSTICK:
    return __glutHasJoystick;
  case GLUT_JOYSTICK_BUTTONS:
    return __glutNumJoystickButtons;
  case GLUT_JOYSTICK_AXES:
    return __glutNumJoystickAxes;
  default:
    __glutWarning("invalid glutDeviceGet parameter: %d", param);
    return -1;
  }
}
/* ENDCENTRY */