glutSpaceballButtonFunc.man
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上传日期:2007-05-28
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GIS编程
开发平台:
Visual C++
- ."
- ." Copyright (c) Mark J. Kilgard, 1996.
- ."
- .TH glutSpaceballButtonFunc 3GLUT "3.7" "GLUT" "GLUT"
- .SH NAME
- glutSpaceballButtonFunc - sets the Spaceball button callback for the current window.
- .SH SYNTAX
- .nf
- .LP
- void glutSpaceballButtonFunc(void (*func)(int button, int state));
- .fi
- .SH ARGUMENTS
- .IP fIfuncfP 1i
- The new spaceball button callback function.
- .SH DESCRIPTION
- glutSpaceballButtonFunc sets the Spaceball button callback for the
- current window. The Spaceball button callback for a window is called
- when the window has Spaceball input focus (normally, when the mouse
- is in the window) and the user generates Spaceball button presses. The
- button parameter will be the button number (starting at one). The
- number of available Spaceball buttons can be determined with
- glutDeviceGet(GLUT_NUM_SPACEBALL_BUTTONS). The state is
- either GLUT_UP or GLUT_DOWN indicating whether the callback was due
- to a release or press respectively.
- Registering a Spaceball button callback when a Spaceball device is not
- available is ineffectual and not an error. In this case, no Spaceball button
- callbacks will be generated.
- Passing NULL to glutSpaceballButtonFunc disables the generation
- of Spaceball button callbacks. When a new window is created, no
- Spaceball button callback is initially registered.
- .SH SEE ALSO
- glutSpaceballMotionFunc, glutSpaceballRotateFunc, glutMouseFunc, glutButtonBoxFunc, glutTabletButtonFunc, glutJoystickFunc, glutDeviceGet
- .SH AUTHOR
- Mark J. Kilgard (mjk@nvidia.com)