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UF_UI_ask_lock_status函数实例代码演示：
这是使用改变状态的机制一个完整的例子。 在此方案是创建一个自定义对话框，启动一个UIStyler对话。当该对话框启动的按钮启动UIStyler对话框变成灰色。
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#include <Xm/XmAll.h>
#include <uf.h>
#include <uf_ui.h>
#include <uf_ui_xt.h>
#include <uf_styler.h>
/* Local Function Prototypes */
static void ok_cb( Widget w, XtPointer client_data,
XtPointer call_data);
static void back_cb( Widget w, XtPointer client_data,
XtPointer call_data);
static void cancel_cb( Widget w, XtPointer client_data,
XtPointer call_data);
static void launch_da2_cb( Widget w, XtPointer button_state,
XtPointer client_data);
static UF_UI_change_state_fn_t lock_change_state(int new_state);
static int initialize_uf( void );
static void call_end_dialog_xt( XtPointer call_data,
XtIntervalId *id );
static void call_end_dialog ( void );
static void create_custom_dialog(Position x, Position y,
Widget parent);
/* Defines */
#define UFUN_INITIALIZED 0
#define UFUN_NOT_INITIALIZED 1
/* Global Variables */
static Widget custom_dialog;
static Widget push_button;
extern void
ufusr(char *param, int *retcod, int param_len)
{
int rcode;
Widget ug_parent;
Position x, y;
if( initialize_uf() == UFUN_NOT_INITIALIZED )
return;
/* Use NX parent and standard dialog area 2 location for */
/* the custom dialog location */
ug_parent = (Widget)UF_UI_get_default_parent();
UF_UI_get_DA2_coords(&x, &y);
create_custom_dialog(x, y, ug_parent);
rcode = UF_UI_register_change_state_fn(
(UF_UI_change_state_fn_t)lock_change_state,
"locktest_change_state");
if (rcode == UF_UI_FAILURE)
UF_UI_set_status("Could not register a change state
function");
XtManageChild (custom_dialog);
UF_terminate();
}
static void create_custom_dialog(Position x, Position y,
Widget parent)
{
int i;
Arg args[20];
Widget form;
XmString canstr, helpstr, okstr;
canstr = XmStringCreate(" Back ", XmSTRING_DEFAULT_CHARSET);
helpstr = XmStringCreate("Cancel", XmSTRING_DEFAULT_CHARSET);
okstr = XmStringCreate(" OK ", XmSTRING_DEFAULT_CHARSET);
/* Create the specified dialog. */
i = 0;
XtSetArg(args[i], XmNcancelLabelString, canstr); i++;
XtSetArg(args[i], XmNhelpLabelString, helpstr); i++;
XtSetArg(args[i], XmNokLabelString, okstr); i++;
XtSetArg(args[i], XmNx, x); i++;
XtSetArg(args[i], XmNy, y); i++;
XtSetArg(args[i], XmNdefaultPosition, False); i++;
XtSetArg(args[i], XmNautoUnmanage, False); i++;
XtSetArg(args[i], XmNdeleteResponse, XmDO_NOTHING); i++;
XtSetArg(args[i], XmNmarginHeight, 10); i++;
XtSetArg(args[i], XmNmarginWidth, 0); i++;
XtSetArg(args[i], XmNdialogType, XmDIALOG_WORKING); i++;
custom_dialog = XmCreateMessageDialog (parent,
"Launch Styler Dialog ",
args, i);
XtUnmanageChild( XmMessageBoxGetChild(custom_dialog,
XmDIALOG_MESSAGE_LABEL) );
XtAddCallback (custom_dialog, XmNcancelCallback, back_cb, NULL);
XtAddCallback (custom_dialog, XmNokCallback, ok_cb, NULL);
XtAddCallback (custom_dialog, XmNhelpCallback, cancel_cb, NULL);
/* Turn the default button off. */
XtVaSetvalues(custom_dialog,
XmNdefaultButton, NULL,
NULL);
form = XtVaCreateManagedWidget("grp",
xmFormWidgetClass,
custom_dialog,
NULL);
push_button = XtVaCreateManagedWidget( "Launch DA2",
xmPushButtonWidgetClass, form,
XmNleftAttachment, XmATTACH_FORM,
XmNrightAttachment, XmATTACH_FORM,
NULL );
XtAddCallback(push_button,
XmNactivateCallback,
(XtCallbackProc) launch_da2_cb,
NULL);
}
/*************************************************************
Name: lock_change_state
Description: This is called whenever the state changes. It
is used to grey out the push button on the
custom dialog.
*************************************************************/
static UF_UI_change_state_fn_t lock_change_state(int new_state)
{
if (custom_dialog != NULL)
{
if (new_state == UF_UI_LOCK)
{
XtSetSensitive(push_button, FALSE);
}
else if (new_state == UF_UI_UNLOCK)
{
XtSetSensitive(push_button, TRUE);
}
}
return(NULL);
} /* end locktest_change_state */
/* The following three functions are the navigation button */
/* callbacks for the custom dialog */
/*************************************************************
Function: ok_cb
Description: This is called whenever the OK button is
pressed on the custom dialog.
Input: w - the widget with the action
client_data - any data the user wants to
pass on.
Output: N/A
Return: N/A
**************************************************************/
static void
ok_cb( Widget w, XtPointer client_data, XtPointer call_data)
{
printf("In ok callback... Not doing anything special\n");
}
/*************************************************************
Function: back_cb
Description: This is called whenever the Back button is
pressed on the custom dialog.
Input: w - the widget with the action
client_data - any data the user wants to
pass on.
Output: N/A
Return: N/A
**************************************************************/
static void
back_cb( Widget w, XtPointer client_data, XtPointer call_data)
{
printf("In back callback... Not doing anything special\n");
}
/*************************************************************
Function: cancel_cb
Description: This is called whenever the Cancel button is
pressed on the custom dialog.
Input: w - the widget with the action
client_data - any data the user wants to
pass on.
Output: N/A
Return: N/A
**************************************************************/
static void
cancel_cb( Widget w, XtPointer client_data, XtPointer call_data)
{
int rcode;
if (initialize_uf() == UFUN_NOT_INITIALIZED)
return;
/* Check the lock status to see if the person is */
/* cancelling when they still have either their */
/* NX Open dialog or UIStyler dialog still up */
if (UF_UI_ask_lock_status() == UF_UI_LOCK)
{
/* Because the NX Open dialog or UIStyler dialog is */
/* still up then you need to send a cancel message */
/* to Unigraphics to cancel this presentation dialog */
/* It is imperative that you cancel the dialog BEFORE */
/* unlocking Unigraphics */
rcode = UF_UI_cancel_uf_dialog (UF_UI_FROM_CUSTOM);
if (rcode == UF_UI_FAILURE)
{
UF_UI_set_status("Could not Cancel the dialog");
/* You still want to destroy your custom dialog */
call_end_dialog();
}
else
XtAppAddTimeOut(XtWidgetToApplicationContext(custom_dialog),
10,
(XtTimerCallbackProc) call_end_dialog_xt,
(XtPointer) NULL);
}
else
call_end_dialog();
UF_terminate();
}
static void call_end_dialog_xt( XtPointer call_data,
XtIntervalId *id )
{
call_end_dialog();
}
static void call_end_dialog ( void )
{
int rcode;
if (initialize_uf() == UFUN_NOT_INITIALIZED)
return;
/* You must unregister your change state function when */
/* your custom dialog is dismissed. If you dismiss your */
/* dialog in the ok and back callback then this should */
/* be done there as well */
rcode = UF_UI_register_change_state_fn(
NULL, "locktest_change_state");
XtDestroyWidget(custom_dialog);
UF_terminate();
}
/**************************************************************
Name: launch_da2_cb
Description: This is called when the user presses the button
in the custom dialog. It launches a UIStyler
dialog.
**************************************************************/
static void
launch_da2_cb( Widget w, XtPointer button_state, XtPointer
client_data)
{
int rcode, response;
int client;
char msg[132];
if (initialize_uf() == UFUN_NOT_INITIALIZED)
return;
/* Because this is being launched from a custom dialog you must */
/* lock Unigraphics before calling a UIStyler dialog or a */
/* NX Open dialog to be displayed */
rcode = UF_UI_lock_ug_access (UF_UI_FROM_CUSTOM);
if (rcode == UF_UI_LOCK_SET)
{
/* Calling the UIStyler dialog */
rcode = UF_STYLER_create_dialog("/mydir/da2_test.dlg",
NULL,
0,
(void *)&client,
&response
);
if (rcode != 0)
{
UF_get_fail_message(rcode,msg);
UF_UI_set_status(msg);
}
rcode == UF_UI_unlock_ug_access (UF_UI_FROM_CUSTOM);
if (rcode == UF_UI_NO_LOCK_EXISTED)
UF_UI_set_status("No lock existed");
}
else
{
UF_UI_set_status("Can not lock NX at this time");
}
UF_terminate();
}
static int initialize_uf( void )
{
int uf_is_initialized;
int initialize_rcode;
uf_is_initialized = UF_is_initialized();
if( uf_is_initialized == 0 )
{
initialize_rcode = UF_initialize();
if( initialize_rcode != 0 )
{
printf("Could not initialize User Function\n");
return (UFUN_NOT_INITIALIZED);
}
}
return (UFUN_INITIALIZED);
}
int ufusr_ask_unload(void)
{
/* Want to only unregister the callback during the */
/* unloading of the NX Open program */
return ( UF_UNLOAD_SEL_DIALOG );
}

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