45 lines
1.3 KiB
Scheme
45 lines
1.3 KiB
Scheme
;;; -*-Scheme-*-
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(define-widget-type 'stripchart "StripChart.h")
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(prolog
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"static void Get_Value (w, client_data, value) Widget w;
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XtPointer client_data; XtPointer value; {
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Object ret;
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ret = Funcall (Get_Function ((int)client_data), Null, 0);
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switch (TYPE(ret)) {
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case T_Fixnum: *(double *)value = (double)FIXNUM(ret); break;
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case T_Flonum: *(double *)value = FLONUM(ret)->val; break;
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case T_Bignum: *(double *)value = Bignum_To_Double (ret); break;
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default: Primitive_Error (\"stripchart sampler must return number\");
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}
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}")
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(define-widget-class 'stripchart 'stripChartWidgetClass)
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(define-primitive 'stripchart-set-sampler '(w p)
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" int i;
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Arg a[1];
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XtCallbackList c;
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Check_Widget_Class (w, stripChartWidgetClass);
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Check_Procedure (p);
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XtSetArg (a[0], XtNgetValue, &c);
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XtGetValues (WIDGET(w)->widget, a, 1);
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if (c[0].callback)
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Primitive_Error (\"stripchart already has a sampler\");
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i = Register_Function (p);
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XtAddCallback (WIDGET(w)->widget, XtNgetValue, Get_Value, (XtPointer)i);
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return Make_Id ('s', (XtPointer)WIDGET(w)->widget, i);")
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(define-primitive 'stripchart-remove-sampler '(i)
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" Widget w;
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w = (Widget)Use_Id (i, 's');
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XtRemoveCallback (w, XtNgetValue, Get_Value,
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(XtPointer)IDENTIFIER(i)->num);
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Deregister_Function (IDENTIFIER(i)->num);
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return Void;")
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