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/*
* Remote Laboratory Seven Segment Display Widget
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* (c) 2012 - 2015 Timothy Pearson
* Raptor Engineering
* http://www.raptorengineeringinc.com
*/
#include <stdlib.h>
#include <tqpainter.h>
#include "sevensegment.h"
Display7Segment::Display7Segment( TQWidget *parent, const char *name )
: TQFrame( parent, name )
{
init();
}
Display7Segment::~Display7Segment() {
free(m_prevSegments);
free(m_currentSegments);
}
void Display7Segment::init() {
setFrameStyle(TQFrame::Box | TQFrame::Raised);
prevSegments = 0;
val = 0;
smallPoint = TRUE;
setSegmentStyle(Flat);
m_prevSegments = (char*)malloc(sizeof(char)*9);
m_currentSegments = (char*)malloc(sizeof(char)*9);
m_prevSegments[0] = 99;
m_currentSegments[0] = 99;
setSizePolicy(TQSizePolicy(TQSizePolicy::Minimum, TQSizePolicy::Minimum));
}
void Display7Segment::setLitSegments(unsigned char segs) {
// This produces an array of up to 10 chars, with each char being the number of a lit segment, and the list being terminated with the number 99
// The bit input in segs is active high
// The bit sequence, MSB to LSB, is dp a b c d e f g
// Segment letters are taken from ug130.pdf
if (prevSegments != segs) {
int i = 0;
if (segs & 0x80) { m_currentSegments[i] = 7; i++; }
if (segs & 0x40) { m_currentSegments[i] = 0; i++; }
if (segs & 0x20) { m_currentSegments[i] = 2; i++; }
if (segs & 0x10) { m_currentSegments[i] = 5; i++; }
if (segs & 0x08) { m_currentSegments[i] = 6; i++; }
if (segs & 0x04) { m_currentSegments[i] = 4; i++; }
if (segs & 0x02) { m_currentSegments[i] = 1; i++; }
if (segs & 0x01) { m_currentSegments[i] = 3; i++; }
m_currentSegments[i] = 99;
update();
}
prevSegments = segs;
}
void Display7Segment::drawContents( TQPainter *p )
{
// Draw all segments
TQPoint pos;
int digitSpace = smallPoint ? 2 : 1;
int xSegLen = width()*5/(1*(5 + digitSpace) + digitSpace);
int ySegLen = height()*5/12;
int segLen = ySegLen > xSegLen ? xSegLen : ySegLen;
int xAdvance = segLen*( 5 + 1 )/5;
int xOffset = ( width() - xAdvance + segLen/5 )/2;
int yOffset = ( height() - segLen*2 )/2;
pos = TQPoint(xOffset, yOffset);
drawDigit(pos, *p, segLen, m_currentSegments);
}
TQSize Display7Segment::sizeHint() const {
return TQSize(10 + 9 * (1 + (smallPoint ? 0 : 1)), 23);
}
void Display7Segment::setSegmentStyle( SegmentStyle s ) {
fill = (s == Flat || s == Filled);
shadow = (s == Outline || s == Filled);
update();
}
Display7Segment::SegmentStyle Display7Segment::segmentStyle() const {
Q_ASSERT(fill || shadow);
if (!fill && shadow) {
return Outline;
}
if (fill && shadow) {
return Filled;
}
return Flat;
}
static void addPoint( TQPointArray &a, const TQPoint &p ) {
uint n = a.size();
a.resize(n + 1);
a.setPoint(n, p);
}
void Display7Segment::drawDigit(const TQPoint &pos, TQPainter &p, int segLen, const char *newSegs) {
char updates[20][2]; // Can hold 2 times number of segments, only
// first 10 used if segment table is correct
int nErases;
int nUpdates;
const char *segs;
int i,j;
const char erase = 0;
const char draw = 1;
// const char leaveAlone = 2;
segs = m_prevSegments;
for ( nErases=0; segs[nErases] != 99; nErases++ ) {
updates[nErases][0] = erase; // Get segments to erase to
updates[nErases][1] = segs[nErases]; // remove old char
}
nUpdates = nErases;
segs = newSegs;
for(i = 0 ; segs[i] != 99 ; i++) {
for ( j=0; j<nErases; j++ ) {
if ( segs[i] == updates[j][1] ) { // Same segment ?
// FIXME
// Always redraw segments for now, as dragging windows in front of the LED display currently erases the occluded portion(s) of the display!
#if 0
updates[j][0] = leaveAlone; // yes, already on screen
break;
#endif
}
}
if ( j == nErases ) { // If not already on screen
updates[nUpdates][0] = draw;
updates[nUpdates][1] = segs[i];
nUpdates++;
}
}
for ( i=0; i<nUpdates; i++ ) {
if ( updates[i][0] == draw ) {
drawSegment( pos, updates[i][1], p, segLen );
}
if (updates[i][0] == erase) {
drawSegment( pos, updates[i][1], p, segLen, TRUE );
}
}
memcpy(m_prevSegments, newSegs, sizeof(char)*9);
}
void Display7Segment::drawSegment(const TQPoint &pos, char segmentNo, TQPainter &p, int segLen, bool erase) {
TQPoint pt = pos;
int width = segLen/5;
const TQColorGroup & g = colorGroup();
TQColor lightColor,darkColor,fgColor;
if (erase) {
lightColor = backgroundColor();
darkColor = lightColor;
fgColor = lightColor;
}
else {
lightColor = g.light();
darkColor = g.dark();
fgColor = g.foreground();
}
#define LINETO(X,Y) addPoint( a, TQPoint(pt.x() + (X),pt.y() + (Y)))
#define LIGHT
#define DARK
if ( fill ) {
TQPointArray a(0);
//The following is an exact copy of the switch below.
//don't make any changes here
switch ( segmentNo ) {
case 0 :
p.moveTo(pt);
LIGHT;
LINETO(segLen - 1,0);
DARK;
LINETO(segLen - width - 1,width);
LINETO(width,width);
LINETO(0,0);
break;
case 1 :
pt += TQPoint(0 , 1);
p.moveTo(pt);
LIGHT;
LINETO(width,width);
DARK;
LINETO(width,segLen - width/2 - 2);
LINETO(0,segLen - 2);
LIGHT;
LINETO(0,0);
break;
case 2 :
pt += TQPoint(segLen - 1 , 1);
p.moveTo(pt);
DARK;
LINETO(0,segLen - 2);
LINETO(-width,segLen - width/2 - 2);
LIGHT;
LINETO(-width,width);
LINETO(0,0);
break;
case 3 :
pt += TQPoint(0 , segLen);
p.moveTo(pt);
LIGHT;
LINETO(width,-width/2);
LINETO(segLen - width - 1,-width/2);
LINETO(segLen - 1,0);
DARK;
if (width & 1) { // adjust for integer division error
LINETO(segLen - width - 3,width/2 + 1);
LINETO(width + 2,width/2 + 1);
} else {
LINETO(segLen - width - 1,width/2);
LINETO(width,width/2);
}
LINETO(0,0);
break;
case 4 :
pt += TQPoint(0 , segLen + 1);
p.moveTo(pt);
LIGHT;
LINETO(width,width/2);
DARK;
LINETO(width,segLen - width - 2);
LINETO(0,segLen - 2);
LIGHT;
LINETO(0,0);
break;
case 5 :
pt += TQPoint(segLen - 1 , segLen + 1);
p.moveTo(pt);
DARK;
LINETO(0,segLen - 2);
LINETO(-width,segLen - width - 2);
LIGHT;
LINETO(-width,width/2);
LINETO(0,0);
break;
case 6 :
pt += TQPoint(0 , segLen*2);
p.moveTo(pt);
LIGHT;
LINETO(width,-width);
LINETO(segLen - width - 1,-width);
LINETO(segLen - 1,0);
DARK;
LINETO(0,0);
break;
case 7 :
if ( smallPoint ) // if smallpoint place'.' between other digits
pt += TQPoint(segLen + width/2 , segLen*2);
else
pt += TQPoint(segLen/2 , segLen*2);
p.moveTo(pt);
DARK;
LINETO(width,0);
LINETO(width,-width);
LIGHT;
LINETO(0,-width);
LINETO(0,0);
break;
case 8 :
pt += TQPoint(segLen/2 - width/2 + 1 , segLen/2 + width);
p.moveTo(pt);
DARK;
LINETO(width,0);
LINETO(width,-width);
LIGHT;
LINETO(0,-width);
LINETO(0,0);
break;
case 9 :
pt += TQPoint(segLen/2 - width/2 + 1 , 3*segLen/2 + width);
p.moveTo(pt);
DARK;
LINETO(width,0);
LINETO(width,-width);
LIGHT;
LINETO(0,-width);
LINETO(0,0);
break;
#if defined(QT_CHECK_RANGE)
default :
tqWarning( "Display7Segment::drawSegment: (%s) Internal error."
" Illegal segment id: %d\n",
name( "unnamed" ), segmentNo );
#endif
}
// End exact copy
p.setPen( fgColor );
p.setBrush( fgColor );
p.drawPolygon( a );
p.setBrush( NoBrush );
pt = pos;
}
#undef LINETO
#undef LIGHT
#undef DARK
#define LINETO(X,Y) p.lineTo(TQPoint(pt.x() + (X),pt.y() + (Y)))
#define LIGHT p.setPen(lightColor)
#define DARK p.setPen(darkColor)
if ( shadow ) {
switch ( segmentNo ) {
case 0 :
p.moveTo(pt);
LIGHT;
LINETO(segLen - 1,0);
DARK;
LINETO(segLen - width - 1,width);
LINETO(width,width);
LINETO(0,0);
break;
case 1 :
pt += TQPoint(0,1);
p.moveTo(pt);
LIGHT;
LINETO(width,width);
DARK;
LINETO(width,segLen - width/2 - 2);
LINETO(0,segLen - 2);
LIGHT;
LINETO(0,0);
break;
case 2 :
pt += TQPoint(segLen - 1 , 1);
p.moveTo(pt);
DARK;
LINETO(0,segLen - 2);
LINETO(-width,segLen - width/2 - 2);
LIGHT;
LINETO(-width,width);
LINETO(0,0);
break;
case 3 :
pt += TQPoint(0 , segLen);
p.moveTo(pt);
LIGHT;
LINETO(width,-width/2);
LINETO(segLen - width - 1,-width/2);
LINETO(segLen - 1,0);
DARK;
if (width & 1) { // adjust for integer division error
LINETO(segLen - width - 3,width/2 + 1);
LINETO(width + 2,width/2 + 1);
} else {
LINETO(segLen - width - 1,width/2);
LINETO(width,width/2);
}
LINETO(0,0);
break;
case 4 :
pt += TQPoint(0 , segLen + 1);
p.moveTo(pt);
LIGHT;
LINETO(width,width/2);
DARK;
LINETO(width,segLen - width - 2);
LINETO(0,segLen - 2);
LIGHT;
LINETO(0,0);
break;
case 5 :
pt += TQPoint(segLen - 1 , segLen + 1);
p.moveTo(pt);
DARK;
LINETO(0,segLen - 2);
LINETO(-width,segLen - width - 2);
LIGHT;
LINETO(-width,width/2);
LINETO(0,0);
break;
case 6 :
pt += TQPoint(0 , segLen*2);
p.moveTo(pt);
LIGHT;
LINETO(width,-width);
LINETO(segLen - width - 1,-width);
LINETO(segLen - 1,0);
DARK;
LINETO(0,0);
break;
case 7 :
if ( smallPoint ) // if smallpoint place'.' between other digits
pt += TQPoint(segLen + width/2 , segLen*2);
else
pt += TQPoint(segLen/2 , segLen*2);
p.moveTo(pt);
DARK;
LINETO(width,0);
LINETO(width,-width);
LIGHT;
LINETO(0,-width);
LINETO(0,0);
break;
case 8 :
pt += TQPoint(segLen/2 - width/2 + 1 , segLen/2 + width);
p.moveTo(pt);
DARK;
LINETO(width,0);
LINETO(width,-width);
LIGHT;
LINETO(0,-width);
LINETO(0,0);
break;
case 9 :
pt += TQPoint(segLen/2 - width/2 + 1 , 3*segLen/2 + width);
p.moveTo(pt);
DARK;
LINETO(width,0);
LINETO(width,-width);
LIGHT;
LINETO(0,-width);
LINETO(0,0);
break;
#if defined(QT_CHECK_RANGE)
default :
tqWarning( "Display7Segment::drawSegment: (%s) Internal error."
" Illegal segment id: %d\n",
name( "unnamed" ), segmentNo );
#endif
}
}
#undef LINETO
#undef LIGHT
#undef DARK
}
#include "sevensegment.moc"
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