xchangepointercontrol(3x) [hpux man page]
XChangePointerControl() XChangePointerControl() Name XChangePointerControl - change the pointer preferences. Synopsis XChangePointerControl(display, do_accel, do_threshold, accel_numerator, accel_denominator, threshold) Display *display; Bool do_accel, do_threshold; int accel_numerator, accel_denominator; int threshold; Arguments display Specifies a connection to an X server; returned from XOpenDisplay(). do_accel Specifies a boolean value that controls whether the values for the accel_numerator or accel_denominator are set. You can pass one of these constants: True or False. do_threshold Specifies a boolean value that controls whether the value for the threshold is set. You can pass one of these constants: True or False. accel_numerator Specifies the numerator for the acceleration multiplier. accel_denominator Specifies the denominator for the acceleration multiplier. threshold Specifies the acceleration threshold. True or False. Description XChangePointerControl() defines how the pointing device functions. The acceleration is a fraction (accel_numerator/accel_denominator) which specifies how many times faster than normal the sprite on the screen moves for a given pointer movement. Acceleration takes effect only when a particular pointer motion is greater than threshold pixels at once, and only applies to the motion beyond threshold pixels. The values for do_accel and do_threshold must be True for the pointer values to be set; otherwise, the parameters will be unchanged. Set- ting any of the last three arguments to -1 restores the default for that argument. The fraction may be rounded arbitrarily by the server. Errors BadValue accel_denominator is 0. Negative value for do_accel or do_threshold. See Also XChangeActivePointerGrab(), XGetPointerControl(), XGetPointerMapping(), XGrabPointer(), XQueryPointer(), XSetPointerMapping(), XUngrab- Pointer(), XWarpPointer(). Xlib - Pointers XChangePointerControl()
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XChangePointerControl(3) XLIB FUNCTIONS XChangePointerControl(3) NAME
XChangePointerControl, XGetPointerControl - control pointer SYNTAX
int XChangePointerControl(Display *display, Bool do_accel, Bool do_threshold, int accel_numerator, int accel_denominator, int threshold); int XGetPointerControl(Display *display, int *accel_numerator_return, int *accel_denominator_return, int *threshold_return); ARGUMENTS
accel_denominator Specifies the denominator for the acceleration multiplier. accel_denominator_return Returns the denominator for the acceleration multiplier. accel_numerator Specifies the numerator for the acceleration multiplier. accel_numerator_return Returns the numerator for the acceleration multiplier. display Specifies the connection to the X server. do_accel Specifies a Boolean value that controls whether the values for the accel_numerator or accel_denominator are used. do_threshold Specifies a Boolean value that controls whether the value for the threshold is used. threshold Specifies the acceleration threshold. threshold_return Returns the acceleration threshold. DESCRIPTION
The XChangePointerControl function defines how the pointing device moves. The acceleration, expressed as a fraction, is a multiplier for movement. For example, specifying 3/1 means the pointer moves three times as fast as normal. The fraction may be rounded arbitrarily by the X server. Acceleration only takes effect if the pointer moves more than threshold pixels at once and only applies to the amount beyond the value in the threshold argument. Setting a value to -1 restores the default. The values of the do_accel and do_threshold arguments must be True for the pointer values to be set, or the parameters are unchanged. Negative values (other than -1) generate a BadValue error, as does a zero value for the accel_denominator argument. XChangePointerControl can generate a BadValue error. The XGetPointerControl function returns the pointer's current acceleration multiplier and acceleration threshold. DIAGNOSTICS
BadValue Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argu- ment, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error. SEE ALSO
Xlib - C Language X Interface X Version 11 libX11 1.5.0 XChangePointerControl(3)