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glutKeyboardUpFunc(3GLUT) GLUT glutKeyboardUpFunc(3GLUT) NAME glutKeyboardUpFunc - sets the keyboard up (key release) callback for the current window. SYNTAX void glutKeyboardUpFunc(void (*func)(unsigned char key, int x, int y)); ARGUMENTS func The new keyboard up callback function. DESCRIPTION glutKeyboardFunc sets the keyboard up (key release) callback for the current window. When a user types into the window, each key release matching an ASCII character will generate a keyboard up callback. The key callback parameter is the generated ASCII character. The state of modifier keys such as Shift cannot be determined directly; their only effect will be on the returned ASCII data. The x and y callback parame- ters indicate the mouse location in window relative coordinates when the key was pressed. When a new window is created, no keyboard callback is initially registered, and ASCII key strokes in the window are ig- nored. Passing NULL to glutKeyboardFunc disables the generation of key- board callbacks. During a keyboard up callback, glutGetModifiers may be called to deter- mine the state of modifier keys when the keystroke generating the call- back occurred. To avoid the reporting of key release/press pairs due to auto repeat, use glutIgnoreKeyRepeat to ignore auto repeated keystrokes. There is no guarantee that the keyboard press callback will match the exact ASCII character as the keyboard up callback. For example, the key down may be for a lowercase b, but the key release may report an uppercase B if the shift state has changed. The same applies to sym- bols and control characters. The precise behavior is window system de- pendent. Use glutSpecialUpFunc for a means to detect non-ASCII key releases. SEE ALSO glutKeyboardFunc, glutSpecialUpFunc, glutSpecialFunc, glutCreateWindow, glutMouseFunc, glutSpaceballButtonFunc, glutButtonBoxFunc, glutTablet- ButtonFunc, glutGetModifiers, glutIgnoreKeyRepeat AUTHOR Mark J. Kilgard (mjk@nvidia.com) GLUT 3.7 glutKeyboardUpFunc(3GLUT)
NAME | SYNTAX | ARGUMENTS | DESCRIPTION | SEE ALSO | AUTHOR
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