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IRIX Base Documentation 1998 November
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IRIX 6.5.2 Base Documentation November 1998.img
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catman
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cat3
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Xi
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XGetFeedbackControl.z
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XGetFeedbackControl
Wrap
Text File
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1998-10-30
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16KB
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397 lines
XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))XXXX VVVVeeeerrrrssssiiiioooonnnn 11111111 ((((RRRReeeelllleeeeaaaasssseeee 6666....3333))))XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))
NNNNAAAAMMMMEEEE
XGetFeedbackControl, XChangeFeedbackControl - query and
change input device feedbacks
SSSSYYYYNNNNTTTTAAAAXXXX
XFeedbackState * XGetFeedbackControl(_d_i_s_p_l_a_y, _d_e_v_i_c_e,
_n_u_m__f_e_e_d_b_a_c_k_s)
Display *_d_i_s_p_l_a_y;
XDevice *_d_e_v_i_c_e;
int *_n_u_m__f_e_e_d_b_a_c_k_s;
int XChangeFeedbackControl(_d_i_s_p_l_a_y, _d_e_v_i_c_e, _m_a_s_k, _c_o_n_t_r_o_l)
Display *_d_i_s_p_l_a_y;
XDevice *_d_e_v_i_c_e;
Mask _m_a_s_k;
XFeedbackControl *_c_o_n_t_r_o_l;
AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
_d_i_s_p_l_a_y Specifies the connection to the X server.
_d_e_v_i_c_e Specifies the device whose feedbacks are to
be queried or modified.
_n_u_m__f_e_e_d_b_a_c_k_s Specifies an address into which the number of
feedbacks supported by the device is to be
returned.
_m_a_s_k Specifies a mask specific to each type of
feedback that describes how the feedback is
to be modified.
_c_o_n_t_r_o_l Specifies the address of an _X_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l
structure that contains the new values for
the feedback.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
These requests are provided to manipulate those input
devices that support feedbacks. A _B_a_d_M_a_t_c_h error will be
generated if the requested device does not support
feedbacks. Whether or not a given device supports feedbacks
can be determined by examining the information returned by
the _X_O_p_e_n_D_e_v_i_c_e request. For those devices that support
feedbacks, _X_O_p_e_n_D_e_v_i_c_e will return an _X_I_n_p_u_t_C_l_a_s_s_I_n_f_o
structure with the input_class field equal to the constant
_F_e_e_d_b_a_c_k_C_l_a_s_s (defined in the file _X_I._h).
The _X_G_e_t_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l request returns a pointer to a list
of _X_F_e_e_d_b_a_c_k_S_t_a_t_e structures. Each item in this list
describes one of the feedbacks supported by the device. The
items are variable length, so each contains its length to
allow traversal to the next item in the list.
Page 1 (printed 4/30/98)
XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))XXXX VVVVeeeerrrrssssiiiioooonnnn 11111111 ((((RRRReeeelllleeeeaaaasssseeee 6666....3333))))XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))
The feedback classes that are currently defined are:
_K_b_d_F_e_e_d_b_a_c_k_C_l_a_s_s, _P_t_r_F_e_e_d_b_a_c_k_C_l_a_s_s, _S_t_r_i_n_g_F_e_e_d_b_a_c_k_C_l_a_s_s,
_I_n_t_e_g_e_r_F_e_e_d_b_a_c_k_C_l_a_s_s, _L_e_d_F_e_e_d_b_a_c_k_C_l_a_s_s, and
_B_e_l_l_F_e_e_d_b_a_c_k_C_l_a_s_s. These constants are defined in the file
_X_I._h. An input device may support zero or more classes of
feedback, and may support multiple feedbacks of the same
class. Each feedback contains a class identifier and an id
that is unique within that class for that input device. The
id is used to identify the feedback when making an
_X_C_h_a_n_g_e_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l request.
_X_G_e_t_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l can generate a _B_a_d_D_e_v_i_c_e or _B_a_d_M_a_t_c_h
error.
The _X_C_h_a_n_g_e_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l request modifies the values of
one feedback on the specified device. The feedback is
identified by the id field of the _X_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l structure
that is passed with the request. The fields of the feedback
that are to be modified are identified by the bits of the
mask that is passed with the request.
_X_C_h_a_n_g_e_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l can generate a _B_a_d_D_e_v_i_c_e, _B_a_d_M_a_t_c_h,
or _B_a_d_V_a_l_u_e error.
SSSSTTTTRRRRUUUUCCCCTTTTUUUURRRREEEESSSS
Each class of feedback is described by a structure specific
to that class. These structures are defined in the file
_X_I_n_p_u_t._h. _X_F_e_e_d_b_a_c_k_S_t_a_t_e and _X_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l are generic
structures that contain three fields that are at the
beginning of each class of feedback:
typedef struct {
XID class;
int length;
XID id;
} XFeedbackState, XFeedbackControl;
The _X_K_b_d_F_e_e_d_b_a_c_k_S_t_a_t_e structure defines the attributes that
are returned for feedbacks equivalent to those on the X
keyboard.
typedef struct {
XID class;
int length;
XID id;
int click;
int percent;
int pitch;
int duration;
int led_mask;
int global_auto_repeat;
char auto_repeats[32];
Page 2 (printed 4/30/98)
XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))XXXX VVVVeeeerrrrssssiiiioooonnnn 11111111 ((((RRRReeeelllleeeeaaaasssseeee 6666....3333))))XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))
} XKbdFeedbackState;
The _X_P_t_r_F_e_e_d_b_a_c_k_S_t_a_t_e structure defines the attributes that
are returned for feedbacks equivalent to those on the the X
pointer.
typedef struct {
XID class;
int length;
XID id;
int accelNum;
int accelDenom;
int threshold;
} XPtrFeedbackState;
The _X_I_n_t_e_g_e_r_F_e_e_d_b_a_c_k_S_t_a_t_e structure defines attributes that
are returned for integer feedbacks.
typedef struct {
XID class;
int length;
XID id;
int resolution;
int minVal;
int maxVal;
} XIntegerFeedbackState;
The _X_S_t_r_i_n_g_F_e_e_d_b_a_c_k_S_t_a_t_e structure defines the attributes
that are returned for string feedbacks.
typedef struct {
XID class;
int length;
XID id;
int max_symbols;
int num_syms_supported;
KeySym *syms_supported;
} XStringFeedbackState;
The _X_B_e_l_l_F_e_e_d_b_a_c_k_S_t_a_t_e structure defines the attributes that
are returned for bell feedbacks.
typedef struct {
XID class;
int length;
XID id;
int percent;
int pitch;
int duration;
} XBellFeedbackState;
The _X_L_e_d_F_e_e_d_b_a_c_k_S_t_a_t_e structure defines the attributes that
Page 3 (printed 4/30/98)
XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))XXXX VVVVeeeerrrrssssiiiioooonnnn 11111111 ((((RRRReeeelllleeeeaaaasssseeee 6666....3333))))XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))
are returned for LED feedbacks.
typedef struct {
XID class;
int length;
XID id;
int led_values;
} XLedFeedbackState;
The _X_P_r_t_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l structure defines the attributes
that can be controlled for pointer feedbacks.
typedef struct {
XID class;
int length;
XID id;
int accelNum;
int accelDenom;
int threshold;
} XPtrFeedbackControl;
The _X_K_b_d_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l structure defines the attributes
that can be controlled for keyboard feedbacks.
typedef struct {
XID class;
int length;
XID id;
int click;
int percent;
int pitch;
int duration;
int led_mask;
int led_value;
int key;
int auto_repeat_mode;
} XKbdFeedbackControl;
The _X_S_t_r_i_n_g_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l structure defines the attributes
that can be controlled for string feedbacks.
typedef struct {
XID class;
int length;
XID id;
int num_keysyms;
KeySym *syms_to_display;
} XStringFeedbackControl;
The _X_I_n_t_e_g_e_r_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l structure defines the attributes
that can be controlled for integer feedbacks.
Page 4 (printed 4/30/98)
XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))XXXX VVVVeeeerrrrssssiiiioooonnnn 11111111 ((((RRRReeeelllleeeeaaaasssseeee 6666....3333))))XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))
typedef struct {
XID class;
int length;
XID id;
int int_to_display;
} XIntegerFeedbackControl;
The _X_B_e_l_l_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l structure defines the attributes
that can be controlled for bell feedbacks.
typedef struct {
XID class;
int length;
XID id;
int percent;
int pitch;
int duration;
} XBellFeedbackControl;
The _X_L_e_d_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l structure defines the attributes
that can be controlled for LED feedbacks.
typedef struct {
XID class;
int length;
XID id;
int led_mask;
int led_values;
} XLedFeedbackControl;
DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS
_B_a_d_D_e_v_i_c_e An invalid device was specified. The specified
device does not exist or has not been opened by
this client via _X_O_p_e_n_I_n_p_u_t_D_e_v_i_c_e. This error
may also occur if some other client has caused
the specified device to become the X keyboard or
X pointer device via the _X_C_h_a_n_g_e_K_e_y_b_o_a_r_d_D_e_v_i_c_e
or _X_C_h_a_n_g_e_P_o_i_n_t_e_r_D_e_v_i_c_e requests.
_B_a_d_M_a_t_c_h This error may occur if an _X_G_e_t_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l
request was made specifying a device that has no
feedbacks, or an _X_C_h_a_n_g_e_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l request
was made with an _X_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l structure that
contains an invalid feedback type. It may also
occur if an invalid combination of mask bits is
specified (_D_v_K_e_y but no _D_v_A_u_t_o_R_e_p_e_a_t_M_o_d_e for
keyboard feedbacks), or if an invalid KeySym is
specified for a string feedback.
_B_a_d_V_a_l_u_e Some numeric value falls outside the range of
values accepted by the _X_C_h_a_n_g_e_F_e_e_d_b_a_c_k_C_o_n_t_r_o_l
request. Unless a specific range is specified
Page 5 (printed 4/30/98)
XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))XXXX VVVVeeeerrrrssssiiiioooonnnn 11111111 ((((RRRReeeelllleeeeaaaasssseeee 6666....3333))))XXXXGGGGeeeettttFFFFeeeeeeeeddddbbbbaaaacccckkkkCCCCoooonnnnttttrrrroooollll((((3333XXXX11111111))))
for an argument, the full range defined by the
argument's type is accepted. Any argument
defined as a set of alternatives can generate
this error.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
_P_r_o_g_r_a_m_m_i_n_g _W_i_t_h _X_l_i_b
Page 6 (printed 4/30/98)