HDIAL(1) HDIAL(1)
12 March 1992
NAME
Hdial - Hdial Widget (Half Dial Widget)
DESCRIPTION
#include "Hdial.h"
The dial widget is an X toolkit compatible widget that displays a
semi-circle dial, an arrow pointer, and a label indicating it's
current value.
WIDGET CLASS
hdialWidgetClass
RESOURCES
XtNforeground
foreground pixel of the widget, default is XtDefaultForeground.
XtNlabelForeground
foreground pixel of the label, default is XtDefaultForeground.
XtNminimum
minimum value of dial (int), default is 0.
XtNmaximum
maximum value of dial (int), default is 65535.
XtNvalue
value of dial (int), default is 0.
XtNfont
font of label (XFontStruct), default is XtDefaultFont.
XtNmargin
minimum margin around widget (int), default is 5.
XtNincrementCallback
increment callback, default is NULL.
XtNdecrementCallback
decrement callback, default is NULL.
XtNvalueChangeCallback
value change callback, default is NULL.
ACTIONS
increment()
will receive a key/button event to increment the value of the
dial, can send an integer as an incrmental value.
decrement()
will receive a key/button event to decrement the value of the
- 1 - Formatted: December 13, 2025
HDIAL(1) HDIAL(1)
12 March 1992
dial, can send an integer as a decremental value.
set()
will receive a key/button event to set the dial arm to the
current pointer position.
drag()
will receive a motion event to set the dial arm to the current
pointer position.
DEFAULT TRANSLATIONS
<key>+: increment(1)
Shift<key>+: increment(100)
<key>-: decrement(1)
Shift<key>-: decrement(100)
<Btn1Down>: set()
<Btn1Motion>: set() drag()
CALLBACK STRUCTURE
typedef struct _HdialCallbackStruct
{
int reason;
XEvent *event;
int value;
} HdialCallbackStruct, *HdialCallbackPtr;
REASONS
HDIAL_INCREMENT
HDIAL_DECREMENT
HDIAL_SET
AUTHOR
John L. Cwikla, 1992
Materials Research Laboratory Center for Computation
University of Illinois, Champaign
- 2 - Formatted: December 13, 2025
