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/* Gauge Widget for XEmacs.
Copyright (C) 1999 Edward A. Falk
This file is part of XEmacs.
XEmacs is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
XEmacs is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with XEmacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Synched up with: Gauge.c 1.2 */
/*
* Gauge.c - Gauge widget
*
* Author: Edward A. Falk
* falk@falconer.vip.best.com
*
* Date: July 9, 1997
*
* Note: for fun and demonstration purposes, I have added selection
* capabilities to this widget. If you select the widget, you create
* a primary selection containing the current value of the widget in
* both integer and string form. If you copy into the widget, the
* primary selection is converted to an integer value and the gauge is
* set to that value.
*/
/* TODO: display time instead of value
*/
#define DEF_LEN 50 /* default width (or height for vertical gauge) */
#define MIN_LEN 10 /* minimum reasonable width (height) */
#define TIC_LEN 6 /* length of tic marks */
#define GA_WID 3 /* width of gauge */
#define MS_PER_SEC 1000
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <X11/IntrinsicP.h>
#include <X11/Xatom.h>
#include <X11/StringDefs.h>
#include ATHENA_XawInit_h_
#include "xlwgaugeP.h"
#include "../src/xmu.h"
#ifdef HAVE_XMU
#include <X11/Xmu/Atoms.h>
#include <X11/Xmu/Drawing.h>
#include <X11/Xmu/StdSel.h>
#endif
/****************************************************************
*
* Gauge resources
*
****************************************************************/
static char defaultTranslations[] =
"<Btn1Up>: select()\n\
<Key>F1: select(CLIPBOARD)\n\
<Btn2Up>: paste()\n\
<Key>F2: paste(CLIPBOARD)" ;
#define offset(field) XtOffsetOf(GaugeRec, field)
static XtResource resources[] = {
{XtNvalue, XtCValue, XtRInt, sizeof(int),
offset(gauge.value), XtRImmediate, (XtPointer)0},
{XtNminValue, XtCMinValue, XtRInt, sizeof(int),
offset(gauge.v0), XtRImmediate, (XtPointer)0},
{XtNmaxValue, XtCMaxValue, XtRInt, sizeof(int),
offset(gauge.v1), XtRImmediate, (XtPointer)100},
{XtNntics, XtCNTics, XtRInt, sizeof(int),
offset(gauge.ntics), XtRImmediate, (XtPointer) 0},
{XtNnlabels, XtCNLabels, XtRInt, sizeof(int),
offset(gauge.nlabels), XtRImmediate, (XtPointer) 0},
{XtNlabels, XtCLabels, XtRStringArray, sizeof(String *),
offset(gauge.labels), XtRStringArray, NULL},
{XtNautoScaleUp, XtCAutoScaleUp, XtRBoolean, sizeof(Boolean),
offset(gauge.autoScaleUp), XtRImmediate, FALSE},
{XtNautoScaleDown, XtCAutoScaleDown, XtRBoolean, sizeof(Boolean),
offset(gauge.autoScaleDown), XtRImmediate, FALSE},
{XtNorientation, XtCOrientation, XtROrientation, sizeof(XtOrientation),
offset(gauge.orientation), XtRImmediate, (XtPointer)XtorientHorizontal},
{XtNupdate, XtCInterval, XtRInt, sizeof(int),
offset(gauge.update), XtRImmediate, (XtPointer)0},
{XtNgetValue, XtCCallback, XtRCallback, sizeof(XtPointer),
offset(gauge.getValue), XtRImmediate, (XtPointer)NULL},
};
#undef offset
/* member functions */
static void GaugeClassInit (void);
static void GaugeInit (Widget, Widget, ArgList, Cardinal *);
static void GaugeDestroy (Widget);
static void GaugeResize (Widget);
static void GaugeExpose (Widget, XEvent *, Region);
static Boolean GaugeSetValues (Widget, Widget, Widget, ArgList, Cardinal *);
static XtGeometryResult GaugeQueryGeometry (Widget, XtWidgetGeometry *,
XtWidgetGeometry *);
/* action procs */
static void GaugeSelect (Widget, XEvent *, String *, Cardinal *);
static void GaugePaste (Widget, XEvent *, String *, Cardinal *);
/* internal privates */
static void GaugeSize (GaugeWidget, Dimension *, Dimension *, Dimension);
static void MaxLabel (GaugeWidget, Dimension *, Dimension *,
Dimension *, Dimension *);
static void AutoScale (GaugeWidget);
static void EnableUpdate (GaugeWidget);
static void DisableUpdate (GaugeWidget);
static void GaugeGetValue (XtPointer, XtIntervalId *);
static void GaugeMercury (Display *, Window, GC, GaugeWidget, int, int);
static Boolean GaugeConvert (Widget, Atom *, Atom *, Atom *,
XtPointer *, unsigned long *, int *);
static void GaugeLoseSel (Widget, Atom *);
static void GaugeDoneSel (Widget, Atom *, Atom *);
static void GaugeGetSelCB (Widget, XtPointer, Atom *, Atom *,
XtPointer, unsigned long *, int *);
static GC Get_GC (GaugeWidget, Pixel);
static XtActionsRec actionsList[] =
{
{"select", GaugeSelect},
{"paste", GaugePaste},
} ;
/****************************************************************
*
* Full class record constant
*
****************************************************************/
GaugeClassRec gaugeClassRec = {
{
/* core_class fields */
/* superclass */ (WidgetClass) &labelClassRec,
/* class_name */ "Gauge",
/* widget_size */ sizeof(GaugeRec),
/* class_initialize */ GaugeClassInit,
/* class_part_initialize */ NULL,
/* class_inited */ FALSE,
/* initialize */ GaugeInit,
/* initialize_hook */ NULL,
/* realize */ XtInheritRealize, /* TODO? */
/* actions */ actionsList,
/* num_actions */ XtNumber(actionsList),
/* resources */ resources,
/* num_resources */ XtNumber(resources),
/* xrm_class */ NULLQUARK,
/* compress_motion */ TRUE,
/* compress_exposure */ TRUE,
/* compress_enterleave */ TRUE,
/* visible_interest */ FALSE,
/* destroy */ GaugeDestroy,
/* resize */ GaugeResize,
/* expose */ GaugeExpose,
/* set_values */ GaugeSetValues,
/* set_values_hook */ NULL,
/* set_values_almost */ XtInheritSetValuesAlmost,
/* get_values_hook */ NULL,
/* accept_focus */ NULL,
/* version */ XtVersion,
/* callback_private */ NULL,
/* tm_table */ defaultTranslations,
/* query_geometry */ GaugeQueryGeometry,
/* display_accelerator */ XtInheritDisplayAccelerator,
/* extension */ NULL
},
/* Simple class fields initialization */
{
/* change_sensitive */ XtInheritChangeSensitive
},
#ifdef _ThreeDP_h
/* ThreeD class fields initialization */
{
XtInheritXaw3dShadowDraw /* shadowdraw */
},
#endif
/* Label class fields initialization */
{
/* ignore */ 0
},
/* Gauge class fields initialization */
{
/* extension */ NULL
},
};
WidgetClass gaugeWidgetClass = (WidgetClass)&gaugeClassRec;
/****************************************************************
*
* Member Procedures
*
****************************************************************/
static void
GaugeClassInit (void)
{
XawInitializeWidgetSet();
#ifdef HAVE_XMU
XtAddConverter(XtRString, XtROrientation, XmuCvtStringToOrientation,
NULL, 0) ;
#endif
}
/* ARGSUSED */
static void
GaugeInit (Widget request,
Widget new,
ArgList args,
Cardinal *num_args)
{
GaugeWidget gw = (GaugeWidget) new;
if( gw->gauge.v0 == 0 && gw->gauge.v1 == 0 ) {
gw->gauge.autoScaleUp = gw->gauge.autoScaleDown = TRUE ;
AutoScale(gw) ;
}
/* If size not explicitly set, set it to our preferred size now. */
if( request->core.width == 0 || request->core.height == 0 )
{
Dimension w,h ;
GaugeSize(gw, &w,&h, DEF_LEN) ;
if( request->core.width == 0 )
new->core.width = w ;
if( request->core.height == 0 )
new->core.height = h ;
gw->core.widget_class->core_class.resize(new) ;
}
gw->gauge.selected = None ;
gw->gauge.selstr = NULL ;
if( gw->gauge.update > 0 )
EnableUpdate(gw) ;
gw->gauge.inverse_GC = Get_GC(gw, gw->core.background_pixel) ;
}
static void
GaugeDestroy (Widget w)
{
GaugeWidget gw = (GaugeWidget)w;
if( gw->gauge.selstr != NULL )
XtFree(gw->gauge.selstr) ;
if( gw->gauge.selected != None )
XtDisownSelection(w, gw->gauge.selected, CurrentTime) ;
XtReleaseGC(w, gw->gauge.inverse_GC) ;
if( gw->gauge.update > 0 )
DisableUpdate(gw) ;
}
/* React to size change from manager. Label widget will compute some
* internal stuff, but we need to override.
*/
static void
GaugeResize (Widget w)
{
GaugeWidget gw = (GaugeWidget)w;
int size ; /* height (width) of gauge */
int vmargin ; /* vertical (horizontal) margin */
int hmargin ; /* horizontal (vertical) margin */
vmargin = gw->gauge.orientation == XtorientHorizontal ?
gw->label.internal_height : gw->label.internal_width ;
hmargin = gw->gauge.orientation == XtorientHorizontal ?
gw->label.internal_width : gw->label.internal_height ;
/* TODO: need to call parent resize proc? I don't think so since
* we're recomputing everything from scratch anyway.
*/
/* find total height (width) of contents */
size = GA_WID+2 ; /* gauge itself + edges */
if( gw->gauge.ntics > 1 ) /* tic marks */
size += vmargin + TIC_LEN ;
if( gw->gauge.nlabels > 1 )
{
Dimension lwm, lw0, lw1 ; /* width of max, left, right labels */
Dimension lh ;
MaxLabel(gw,&lwm,&lh, &lw0,&lw1) ;
if( gw->gauge.orientation == XtorientHorizontal )
{
gw->gauge.margin0 = lw0 / 2 ;
gw->gauge.margin1 = lw1 / 2 ;
size += lh + vmargin ;
}
else
{
gw->gauge.margin0 =
gw->gauge.margin1 = lh / 2 ;
size += lwm + vmargin ;
}
}
else
gw->gauge.margin0 = gw->gauge.margin1 = 0 ;
gw->gauge.margin0 += hmargin ;
gw->gauge.margin1 += hmargin ;
/* Now distribute height (width) over components */
if( gw->gauge.orientation == XtorientHorizontal )
gw->gauge.gmargin = (gw->core.height-size)/2 ;
else
gw->gauge.gmargin = (gw->core.width-size)/2 ;
gw->gauge.tmargin = gw->gauge.gmargin + GA_WID+2 + vmargin ;
if( gw->gauge.ntics > 1 )
gw->gauge.lmargin = gw->gauge.tmargin + TIC_LEN + vmargin ;
else
gw->gauge.lmargin = gw->gauge.tmargin ;
}
/*
* Repaint the widget window
*/
/* ARGSUSED */
static void
GaugeExpose (Widget w,
XEvent *event,
Region region)
{
GaugeWidget gw = (GaugeWidget) w;
register Display *dpy = XtDisplay(w) ;
register Window win = XtWindow(w) ;
GC gc; /* foreground, background */
GC gctop, gcbot ; /* dark, light shadows */
int len ; /* length (width or height) of widget */
int hgt ; /* height (width) of widget */
int e0,e1 ; /* ends of the gauge */
int x ;
int y ; /* vertical (horizontal) position */
int i ;
int v0 = gw->gauge.v0 ;
int v1 = gw->gauge.v1 ;
int value = gw->gauge.value ;
gc = XtIsSensitive(w) ? gw->label.normal_GC : gw->label.gray_GC ;
#ifdef _ThreeDP_h
gctop = gw->threeD.bot_shadow_GC ;
gcbot = gw->threeD.top_shadow_GC ;
#else
gctop = gcbot = gc ;
#endif
if( gw->gauge.orientation == XtorientHorizontal ) {
len = gw->core.width ;
hgt = gw->core.height ;
} else {
len = gw->core.height ;
hgt = gw->core.width ;
}
/* if the gauge is selected, signify by drawing the background
* in a contrasting color.
*/
if( gw->gauge.selected )
{
XFillRectangle(dpy,win, gc, 0,0, w->core.width,w->core.height) ;
gc = gw->gauge.inverse_GC ;
}
e0 = gw->gauge.margin0 ; /* left (top) end */
e1 = len - gw->gauge.margin1 -1 ; /* right (bottom) end */
/* Draw the Gauge itself */
y = gw->gauge.gmargin ;
if( gw->gauge.orientation == XtorientHorizontal ) /* horizontal */
{
XDrawLine(dpy,win,gctop, e0+1,y, e1-1,y) ;
XDrawLine(dpy,win,gctop, e0,y+1, e0,y+GA_WID) ;
XDrawLine(dpy,win,gcbot, e0+1, y+GA_WID+1, e1-1, y+GA_WID+1) ;
XDrawLine(dpy,win,gcbot, e1,y+1, e1,y+GA_WID) ;
}
else /* vertical */
{
XDrawLine(dpy,win,gctop, y,e0+1, y,e1-1) ;
XDrawLine(dpy,win,gctop, y+1,e0, y+GA_WID,e0) ;
XDrawLine(dpy,win,gcbot, y+GA_WID+1,e0+1, y+GA_WID+1, e1-1) ;
XDrawLine(dpy,win,gcbot, y+1,e1, y+GA_WID,e1) ;
}
/* draw the mercury */
GaugeMercury(dpy, win, gc, gw, 0,value) ;
if( gw->gauge.ntics > 1 )
{
y = gw->gauge.tmargin ;
for(i=0; i<gw->gauge.ntics; ++i)
{
x = e0 + i*(e1-e0-1)/(gw->gauge.ntics-1) ;
if( gw->gauge.orientation == XtorientHorizontal ) {
XDrawLine(dpy,win,gcbot, x,y+1, x,y+TIC_LEN-2) ;
XDrawLine(dpy,win,gcbot, x,y, x+1,y) ;
XDrawLine(dpy,win,gctop, x+1,y+1, x+1,y+TIC_LEN-2) ;
XDrawLine(dpy,win,gctop, x,y+TIC_LEN-1, x+1,y+TIC_LEN-1) ;
}
else {
XDrawLine(dpy,win,gcbot, y+1,x, y+TIC_LEN-2,x) ;
XDrawLine(dpy,win,gcbot, y,x, y,x+1) ;
XDrawLine(dpy,win,gctop, y+1,x+1, y+TIC_LEN-2,x+1) ;
XDrawLine(dpy,win,gctop, y+TIC_LEN-1,x, y+TIC_LEN-1,x+1) ;
}
}
}
/* draw labels */
if( gw->gauge.nlabels > 1 )
{
char label[20], *s = label ;
int xlen, wd,h =0 ;
if( gw->gauge.orientation == XtorientHorizontal )
y = gw->gauge.lmargin + gw->label.font->max_bounds.ascent - 1 ;
else {
y = gw->gauge.lmargin ;
h = gw->label.font->max_bounds.ascent / 2 ;
}
for(i=0; i<gw->gauge.nlabels; ++i)
{
if( gw->gauge.labels == NULL )
sprintf(label, "%d", v0+i*(v1 - v0)/(gw->gauge.nlabels - 1)) ;
else
s = gw->gauge.labels[i] ;
if( s != NULL ) {
x = e0 + i*(e1-e0-1)/(gw->gauge.nlabels-1) ;
xlen = strlen(s) ;
if( gw->gauge.orientation == XtorientHorizontal ) {
wd = XTextWidth(gw->label.font, s, xlen) ;
XDrawString(dpy,win,gc, x-wd/2,y, s,xlen) ;
}
else {
XDrawString(dpy,win,gc, y,x+h, s,xlen) ;
}
}
}
}
}
/*
* Set specified arguments into widget
*/
static Boolean
GaugeSetValues (Widget old,
Widget request,
Widget new,
ArgList args,
Cardinal *num_args)
{
GaugeWidget oldgw = (GaugeWidget) old;
GaugeWidget gw = (GaugeWidget) new;
Boolean was_resized = False;
if( gw->gauge.selected != None ) {
XtDisownSelection(new, gw->gauge.selected, CurrentTime) ;
gw->gauge.selected = None ;
}
/* Changes to v0,v1,labels, ntics, nlabels require resize & redraw. */
/* Change to value requires redraw and possible resize if autoscale */
was_resized =
gw->gauge.v0 != oldgw->gauge.v0 ||
gw->gauge.v1 != oldgw->gauge.v1 ||
gw->gauge.ntics != oldgw->gauge.ntics ||
gw->gauge.nlabels != oldgw->gauge.nlabels ||
gw->gauge.labels != oldgw->gauge.labels ;
if( (gw->gauge.autoScaleUp && gw->gauge.value > gw->gauge.v1) ||
(gw->gauge.autoScaleDown && gw->gauge.value < gw->gauge.v1/3 ))
{
AutoScale(gw) ;
was_resized = TRUE ;
}
if( was_resized ) {
if( gw->label.resize )
GaugeSize(gw, &gw->core.width, &gw->core.height, DEF_LEN) ;
else
GaugeResize(new) ;
}
if( gw->gauge.update != oldgw->gauge.update )
{
if( gw->gauge.update > 0 )
EnableUpdate(gw) ;
else
DisableUpdate(gw) ;
}
if( gw->core.background_pixel != oldgw->core.background_pixel )
{
XtReleaseGC(new, gw->gauge.inverse_GC) ;
gw->gauge.inverse_GC = Get_GC(gw, gw->core.background_pixel) ;
}
return was_resized || gw->gauge.value != oldgw->gauge.value ||
XtIsSensitive(old) != XtIsSensitive(new);
}
static XtGeometryResult
GaugeQueryGeometry (Widget w,
XtWidgetGeometry *intended,
XtWidgetGeometry *preferred)
{
register GaugeWidget gw = (GaugeWidget)w;
if( intended->width == w->core.width &&
intended->height == w->core.height )
return XtGeometryNo ;
preferred->request_mode = CWWidth | CWHeight;
GaugeSize(gw, &preferred->width, &preferred->height, DEF_LEN) ;
if( (!(intended->request_mode & CWWidth) ||
intended->width >= preferred->width) &&
(!(intended->request_mode & CWHeight) ||
intended->height >= preferred->height) )
return XtGeometryYes;
else
return XtGeometryAlmost;
}
/****************************************************************
*
* Action Procedures
*
****************************************************************/
static void
GaugeSelect (Widget w,
XEvent *event,
String *params,
Cardinal *num_params)
{
GaugeWidget gw = (GaugeWidget)w ;
Atom seln = XA_PRIMARY ;
if( gw->gauge.selected != None ) {
XtDisownSelection(w, gw->gauge.selected, CurrentTime) ;
gw->gauge.selected = None ;
}
if( *num_params > 0 ) {
seln = XInternAtom(XtDisplay(w), params[0], False) ;
printf("atom %s is %ld\n", params[0], seln) ;
}
if( ! XtOwnSelection(w, seln, event->xbutton.time, GaugeConvert,
GaugeLoseSel, GaugeDoneSel) )
{
/* in real code, this error message would be replaced by
* something more elegant, or at least deleted
*/
fprintf(stderr, "Gauge failed to get selection, try again\n") ;
}
else
{
gw->gauge.selected = TRUE ;
gw->gauge.selstr = (String)XtMalloc(4*sizeof(int)) ;
sprintf(gw->gauge.selstr, "%d", gw->gauge.value) ;
GaugeExpose(w,0,0) ;
}
}
static Boolean
GaugeConvert (Widget w,
Atom *selection, /* usually XA_PRIMARY */
Atom *target, /* requested target */
Atom *type, /* returned type */
XtPointer *value, /* returned value */
unsigned long *length, /* returned length */
int *format) /* returned format */
{
GaugeWidget gw = (GaugeWidget)w ;
XSelectionRequestEvent *req ;
printf( "requesting selection %s:%s\n",
XGetAtomName(XtDisplay(w),*selection),
XGetAtomName(XtDisplay(w),*target));
#ifdef HAVE_XMU
if( *target == XA_TARGETS(XtDisplay(w)) )
{
Atom *rval, *stdTargets ;
unsigned long stdLength ;
/* XmuConvertStandardSelection can handle this. This function
* will return a list of standard targets. We prepend TEXT,
* STRING and INTEGER to the list and return it.
*/
req = XtGetSelectionRequest(w, *selection, NULL) ;
XmuConvertStandardSelection(w, req->time, selection, target,
type, (XPointer*)&stdTargets, &stdLength, format) ;
*type = XA_ATOM ; /* TODO: needed? */
*length = stdLength + 3 ;
rval = (Atom *) XtMalloc(sizeof(Atom)*(stdLength+3)) ;
*value = (XtPointer) rval ;
*rval++ = XA_INTEGER ;
*rval++ = XA_STRING ;
*rval++ = XA_TEXT(XtDisplay(w)) ;
memcpy((char *)rval, (char *)stdTargets, stdLength*sizeof(Atom)) ;
XtFree((char*) stdTargets) ;
*format = 8*sizeof(Atom) ; /* TODO: needed? */
return True ;
}
else
#endif
if( *target == XA_INTEGER )
{
*type = XA_INTEGER ;
*length = 1 ;
*value = (XtPointer) &gw->gauge.value ;
*format = 8*sizeof(int) ;
return True ;
}
else if( *target == XA_STRING
#ifdef HAVE_XMU
||
*target == XA_TEXT(XtDisplay(w))
#endif
)
{
*type = *target ;
*length = strlen(gw->gauge.selstr)*sizeof(char) ;
*value = (XtPointer) gw->gauge.selstr ;
*format = 8 ;
return True ;
}
else
{
/* anything else, we just give it to XmuConvertStandardSelection() */
#ifdef HAVE_XMU
req = XtGetSelectionRequest(w, *selection, NULL) ;
if( XmuConvertStandardSelection(w, req->time, selection, target,
type, (XPointer *) value, length, format) )
return True ;
else
#endif
{
printf(
"Gauge: requestor is requesting unsupported selection %s:%s\n",
XGetAtomName(XtDisplay(w),*selection),
XGetAtomName(XtDisplay(w),*target));
return False ;
}
}
}
static void
GaugeLoseSel (Widget w,
Atom *selection) /* usually XA_PRIMARY */
{
GaugeWidget gw = (GaugeWidget)w ;
Display *dpy = XtDisplay(w) ;
Window win = XtWindow(w) ;
if( gw->gauge.selstr != NULL ) {
XtFree(gw->gauge.selstr) ;
gw->gauge.selstr = NULL ;
}
gw->gauge.selected = False ;
XClearWindow(dpy,win) ;
GaugeExpose(w,0,0) ;
}
static void
GaugeDoneSel (Widget w,
Atom *selection, /* usually XA_PRIMARY */
Atom *target) /* requested target */
{
/* selection done, anything to do? */
}
static void
GaugePaste (Widget w,
XEvent *event,
String *params,
Cardinal *num_params)
{
Atom seln = XA_PRIMARY ;
if( *num_params > 0 ) {
seln = XInternAtom(XtDisplay(w), params[0], False) ;
printf("atom %s is %ld\n", params[0], seln) ;
}
/* try for integer value first */
XtGetSelectionValue(w, seln, XA_INTEGER,
GaugeGetSelCB, (XtPointer)XA_INTEGER,
event->xbutton.time) ;
}
static void
GaugeGetSelCB (Widget w,
XtPointer client,
Atom *selection,
Atom *type,
XtPointer value,
unsigned long *length,
int *format)
{
Display *dpy = XtDisplay(w) ;
Atom target = (Atom)client ;
int *iptr ;
char *cptr ;
if( *type == XA_INTEGER ) {
iptr = (int *)value ;
XawGaugeSetValue(w, *iptr) ;
}
else if( *type == XA_STRING
#ifdef HAVE_XMU
||
*type == XA_TEXT(dpy)
#endif
)
{
cptr = (char *)value ;
XawGaugeSetValue(w, atoi(cptr)) ;
}
/* failed, try string */
else if( *type == None && target == XA_INTEGER )
XtGetSelectionValue(w, *selection, XA_STRING,
GaugeGetSelCB, (XtPointer)XA_STRING,
CurrentTime) ;
}
/****************************************************************
*
* Public Procedures
*
****************************************************************/
/* Change gauge value. Only undraw or draw what needs to be
* changed.
*/
void
XawGaugeSetValue (Widget w, int value)
{
GaugeWidget gw = (GaugeWidget)w ;
int oldvalue ;
GC gc ;
if( gw->gauge.selected != None ) {
XtDisownSelection(w, gw->gauge.selected, CurrentTime) ;
gw->gauge.selected = None ;
}
if( !XtIsRealized(w) ) {
gw->gauge.value = value ;
return ;
}
/* need to rescale? */
if(( gw->gauge.autoScaleUp && value > gw->gauge.v1) ||
(gw->gauge.autoScaleDown && value < gw->gauge.v1/3 ))
{
XtVaSetValues(w, XtNvalue, value, 0) ;
return ;
}
oldvalue = gw->gauge.value ;
gw->gauge.value = value ;
gc = XtIsSensitive(w) ? gw->label.normal_GC : gw->label.gray_GC ;
GaugeMercury(XtDisplay(w), XtWindow(w), gc, gw, oldvalue,value) ;
}
int
XawGaugeGetValue (Widget w)
{
GaugeWidget gw = (GaugeWidget)w ;
return gw->gauge.value ;
}
/****************************************************************
*
* Private Procedures
*
****************************************************************/
/* draw the mercury over a specific region */
static void
GaugeMercury (Display *dpy,
Window win,
GC gc,
GaugeWidget gw,
int val0,
int val1)
{
int v0 = gw->gauge.v0 ;
int v1 = gw->gauge.v1 ;
int vd = v1 - v0 ;
Dimension len ; /* length (width or height) of gauge */
Position e0, e1 ; /* gauge ends */
Position p0, p1 ; /* mercury ends */
int y ; /* vertical (horizontal) position */
Boolean undraw = FALSE ;
len = gw->gauge.orientation == XtorientHorizontal ?
gw->core.width : gw->core.height ;
e0 = gw->gauge.margin0 ; /* left (top) end */
e1 = len - gw->gauge.margin1 -1 ; /* right (bottom) end */
if( vd <= 0 ) vd = 1 ;
if( val0 < v0 ) val0 = v0 ;
else if( val0 > v1 ) val0 = v1 ;
if( val1 < v0 ) val1 = v0 ;
else if( val1 > v1 ) val1 = v1 ;
p0 = (val0-v0)*(e1-e0-1)/vd ;
p1 = (val1-v0)*(e1-e0-1)/vd ;
if( p1 == p0 )
return ;
y = gw->gauge.gmargin ;
if( p1 < p0 )
{
Position tmp = p0 ;
p0 = p1 ;
p1 = tmp ;
gc = gw->label.normal_GC ;
XSetForeground(dpy,gc, gw->core.background_pixel) ;
undraw = TRUE ;
}
if( gw->gauge.orientation == XtorientHorizontal )
XFillRectangle(dpy,win,gc, e0+p0+1,y+1, p1-p0,GA_WID) ;
else
XFillRectangle(dpy,win,gc, y+1,e1-p1, GA_WID,p1-p0) ;
if( undraw )
XSetForeground(dpy,gc, gw->label.foreground) ;
}
/* Search the labels, find the largest one. */
/* TODO: handle vertical fonts? */
static void
MaxLabel (GaugeWidget gw,
Dimension *wid, /* max label width */
Dimension *hgt, /* max label height */
Dimension *w0, /* width of first label */
Dimension *w1) /* width of last label */
{
char lstr[80], *lbl ;
int w ;
XFontStruct *font = gw->label.font ;
int i ;
int lw = 0;
int v0 = gw->gauge.v0 ;
int dv = gw->gauge.v1 - v0 ;
int n = gw->gauge.nlabels ;
if( n > 0 )
{
if( --n <= 0 ) {n = 1 ; v0 += dv/2 ;}
/* loop through all labels, figure out how much room they
* need.
*/
w = 0 ;
for(i=0; i<gw->gauge.nlabels; ++i)
{
if( gw->gauge.labels == NULL ) /* numeric labels */
sprintf(lbl = lstr,"%d", v0 + i*dv/n) ;
else
lbl = gw->gauge.labels[i] ;
if( lbl != NULL ) {
lw = XTextWidth(font, lbl, strlen(lbl)) ;
w = Max( w, lw ) ;
}
else
lw = 0 ;
if( i == 0 && w0 != NULL ) *w0 = lw ;
}
if( w1 != NULL ) *w1 = lw ;
*wid = w ;
*hgt = font->max_bounds.ascent + font->max_bounds.descent ;
}
else
*wid = *hgt = 0 ;
}
/* Determine the preferred size for this widget. choose 100x100 for
* debugging.
*/
static void
GaugeSize (GaugeWidget gw,
Dimension *wid,
Dimension *hgt,
Dimension min_len)
{
int w,h ; /* width, height of gauge */
int vmargin ; /* vertical margin */
int hmargin ; /* horizontal margin */
hmargin = gw->label.internal_width ;
vmargin = gw->label.internal_height ;
/* find total height (width) of contents */
/* find minimum size for undecorated gauge */
if( gw->gauge.orientation == XtorientHorizontal )
{
w = min_len ;
h = GA_WID+2 ; /* gauge itself + edges */
}
else
{
w = GA_WID+2 ;
h = min_len ;
}
if( gw->gauge.ntics > 0 )
{
if( gw->gauge.orientation == XtorientHorizontal )
{
w = Max(w, gw->gauge.ntics*3) ;
h += vmargin + TIC_LEN ;
}
else
{
w += hmargin + TIC_LEN ;
h = Max(h, gw->gauge.ntics*3) ;
}
}
/* If labels are requested, this gets a little interesting.
* We want the end labels centered on the ends of the gauge and
* the centers of the labels evenly spaced. The labels at the ends
* will not be the same width, meaning that the gauge itself need
* not be centered in the widget.
*
* First, determine the spacing. This is the width of the widest
* label, plus the internal margin. Total length of the gauge is
* spacing * (nlabels-1). To this, we add half the width of the
* left-most label and half the width of the right-most label
* to get the entire desired width of the widget.
*/
if( gw->gauge.nlabels > 0 )
{
Dimension lwm, lw0, lw1 ; /* width of max, left, right labels */
Dimension lh ;
MaxLabel(gw,&lwm,&lh, &lw0,&lw1) ;
if( gw->gauge.orientation == XtorientHorizontal )
{
lwm = (lwm+hmargin) * (gw->gauge.nlabels-1) + (lw0+lw1)/2 ;
w = Max(w, lwm) ;
h += lh + vmargin ;
}
else
{
lh = lh*gw->gauge.nlabels + (gw->gauge.nlabels - 1)*vmargin ;
h = Max(h, lh) ;
w += lwm + hmargin ;
}
}
w += hmargin*2 ;
h += vmargin*2 ;
*wid = w ;
*hgt = h ;
}
static void
AutoScale (GaugeWidget gw)
{
static int scales[3] = {1,2,5} ;
int sptr = 0, smult=1 ;
if( gw->gauge.autoScaleDown )
gw->gauge.v1 = 0 ;
while( gw->gauge.value > gw->gauge.v1 )
{
if( ++sptr > 2 ) {
sptr = 0 ;
smult *= 10 ;
}
gw->gauge.v1 = scales[sptr] * smult ;
}
}
static void
EnableUpdate (GaugeWidget gw)
{
gw->gauge.intervalId =
XtAppAddTimeOut(XtWidgetToApplicationContext((Widget)gw),
gw->gauge.update * MS_PER_SEC, GaugeGetValue,
(XtPointer)gw) ;
}
static void
DisableUpdate (GaugeWidget gw)
{
XtRemoveTimeOut(gw->gauge.intervalId) ;
}
static void
GaugeGetValue (XtPointer clientData,
XtIntervalId *intervalId)
{
GaugeWidget gw = (GaugeWidget)clientData ;
int value ;
if( gw->gauge.update > 0 )
EnableUpdate(gw) ;
if( gw->gauge.getValue != NULL )
{
XtCallCallbackList((Widget)gw, gw->gauge.getValue, (XtPointer)&value);
XawGaugeSetValue((Widget)gw, value) ;
}
}
static GC
Get_GC (GaugeWidget gw,
Pixel fg)
{
XGCValues values ;
#define vmask GCForeground
#define umask (GCBackground|GCSubwindowMode|GCGraphicsExposures|GCDashOffset\
|GCFont|GCDashList|GCArcMode)
values.foreground = fg ;
return XtAllocateGC((Widget)gw, 0, vmask, &values, 0L, umask) ;
}
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