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ILI9341_t3_Controls.cpp
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ILI9341_t3_Controls.cpp
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/*
The MIT License (MIT)
library writen by Kris Kasprzak
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
On a personal note, if you develop an application or product using this library
and make millions of dollars, I'm happy for you!
rev date author change
1.0 9/2019 kasprzak initial code
2.0 9/2020 kasprzak added shapes and sizes for handles
3.0 10/2020 kasprzak fixed some repaint issues in CGraph, added marker support, added Button class with tons of methods
4.0 11/2020 kasprzak fixed bugs added Button, Checkbox, OptionButton classes
5.0 11/2020 kasprzak modified sliders, option and check to return true/false if pressed, and actual value stored in value property
5.1 11/2020 kasprzak added automatic "blank out" old handle support insided draw() method in sliderH and SliderV (really needed when a slide is redrawn based on input other than a finger slide (encoder)
5.4 12/2021 kasprzak added ring sliders
5.5 11/2022 kasprzak added better text centering control
*/
#include "ILI9341_t3_Controls.h"
#include <ILI9341_t3.h> // fast display driver lib
float degtorad = .0174532778;
/*//////////////////////////////////////////////////////////////////////////////////////////////////////////
horizontal bar chart
*///////////////////////////////////////////////////////////////////////////////////////////////////////////
BarChartH::BarChartH(ILI9341_t3 *Display){
d = Display;
}
void BarChartH::init(float GraphXLoc, float GraphYLoc, float GraphWidth, float GraphHeight, float ScaleLow, float ScaleHigh, float ScaleInc, const char *Title, uint16_t TextColor, uint16_t BorderColor, uint16_t BarColor, uint16_t BarBColor, uint16_t BackColor, const ILI9341_t3_font_t &TitleFont , const ILI9341_t3_font_t &ScaleFont ){
Low = ScaleLow;
High = ScaleHigh;
Inc = ScaleInc;
gx = GraphXLoc;
gy = GraphYLoc;
gw = GraphWidth;
gh = GraphHeight;
strncpy(ti, Title, 20);
tf = TitleFont;
sf = ScaleFont;
tc = TextColor;
oc = BorderColor;
rc = BarColor;
ac = BarBColor;
bc = BackColor;
redraw = true;
}
void BarChartH::draw(float val){
if (redraw == true) {
redraw = false;
// step val basically scales the hival and low val to the height
// deducting a small value to eliminate round off errors
// this val may need to be adjusted
if (ss){
d->setFont(sf);
stepval = MapFloat(Inc, Low, High, 0, gw);
// paint over previous y scale
tHi = sf.cap_height * 2 + 8;
d->fillRect(gx-10, gy + gh + 1, gw+30, tHi, bc);
d->setTextColor(tc, bc);
for (i = 0; i <= gw; i += stepval) {
d->drawFastVLine(i + gx, gy + gh+ 1, 5, tc);
// draw lables
if (High < .1) {
Dec = 3;
}
else if (High <= 1) {
Dec = 2;
}
else if (High <= 10) {
Dec = 1;
}
else {
Dec = 0;
}
data = i * (Inc / stepval);
dtostrf(data, 0, Dec,text);
tLen = d->strPixelLen(text) * 1.2;
tHi =sf.cap_height;
d->setCursor(i + gx - (tLen / 2) , gy + gh + 10);
d->print(text);
}
}
if(st){
d->setTextColor(tc, bc);
d->setFont(tf);
tHi = sf.cap_height * 2 + 8;
d->setCursor(gx , gy -tHi );
d->print(ti);
}
}
// compute level of bar graph that is scaled to the height and the hi and low vals
if (val >= High) {
val = High;
}
if (val <= Low) {
val = Low;
}
level = MapFloat( val, Low, High, gx, gx+gw);
// draw the bar graph
// write a upper and lower bar to minimize flicker cause by blanking out bar and redraw on update
d->fillRect(level, gy + 1, gx+gw - level, gh - 2,ac);
d->fillRect(gx, gy + 1 , level - gx, gh - 2, rc);
d->drawRect(gx , gy, gw, gh, oc);
}
void BarChartH::setBarColor(uint16_t BarColor){
rc = BarColor;
}
void BarChartH::setScale(float ScaleLow, float ScaleHigh, float ScaleInc){
Low = ScaleLow;
High = ScaleHigh;
Inc = ScaleInc;
redraw = true;
}
void BarChartH::showTitle(bool val){
st = val;
}
void BarChartH::showScale(bool val){
ss = val;
}
/*//////////////////////////////////////////////////////////////////////////////////////////////////////////
vertical bar chart
*///////////////////////////////////////////////////////////////////////////////////////////////////////////
BarChartV::BarChartV(ILI9341_t3 *Display){
d = Display;
}
void BarChartV::init(float GraphXLoc, float GraphYLoc, float GraphWidth, float GraphHeight, float ScaleLow, float ScaleHigh, float ScaleInc, const char *Title, uint16_t TextColor,uint16_t BorderColor, uint16_t BarColor, uint16_t BarBlankColor,uint16_t BackgroundColor, const ILI9341_t3_font_t &TitleFont , const ILI9341_t3_font_t &ScaleFont ){
Low = ScaleLow;
High = ScaleHigh;
Inc = ScaleInc;
gx = GraphXLoc;
gy = GraphYLoc;
gw = GraphWidth;
gh = GraphHeight;
strncpy(ti, Title, 20);
tf = TitleFont;
sf = ScaleFont;
tc = TextColor;
oc = BorderColor;
rc = BarColor;
ac = BarBlankColor;
bc = BackgroundColor;
redraw = true;
}
void BarChartV::draw(float val){
if (redraw == true) {
redraw = false;
if (ss) {
d->setFont(sf);
stepval = (High - Low) / Inc;
// paint over previous y scale
d->fillRect(gx + gw, gy - gh - 15, 70, gh + 30, bc);
d->setTextColor(tc, bc);
for (i = 0; i <= stepval; i++) {
TempY = gy - ((gh / stepval) * i);
d->drawFastHLine(gx + gw , TempY, 5, tc);
data = Low + (Inc * i);
// draw lables
if (Inc < .1) {
Dec = 3;
}
else if (Inc < 1) {
Dec = 2;
}
else if (Inc < 10) {
Dec = 1;
}
else {
Dec = 0;
}
dtostrf(data, 0, Dec,text);
tLen = d->strPixelLen(text) * 1.2;
tHi =sf.cap_height;
d->setCursor(gx + gw + 12, TempY - (tHi / 2) );
d->print(text);
}
}
if (st){
d->setTextColor(tc, bc);
d->setFont(tf);
tHi =sf.cap_height * 2 + 5;
d->setCursor(gx , gy - gh -tHi );
d->print(ti);
}
}
// compute level of bar graph that is scaled to the height and the hi and low vals
// this is needed to accompdate for +/- range
if (val >= High) {
val = High;
}
if (val <= Low) {
val = Low;
}
level = (gh * (((val - Low) / (High - Low))));
// draw the bar graph
// write a upper and lower bar to minimize flicker cause by blanking out bar and redraw on update
d->fillRect(gx+1, gy - gh, gw - 2, gh - level, ac);
d->fillRect(gx+1, gy - level , gw - 2, level, rc);
d->drawRect(gx , gy - gh - 1 , gw, gh+2, oc);
}
/*
void BarChartV::draw(float val){
if (redraw == true) {
redraw = false;
// step val basically scales the hival and low val to the height
// deducting a small value to eliminate round off errors
// this val may need to be adjusted
if (ss) {
d->setFont(sf);
stepval = MapFloat( Inc,Low, High,gy - gh, gy);
//stepval = MapFloat(y, YHigh, YLow, gy - gh, gy);
Serial.print("239: "); Serial.println(stepval);
// paint over previous y scale
d->fillRect(gx + gw, gy - gh - 15, 70, gh + 30, bc);
d->setTextColor(tc, bc);
for (i = 0; i <= gh; i += stepval) {
TempY = gy - gh + i;
d->drawFastHLine(gx + gw , TempY, 5, tc);
// draw lables
//Serial.print("247: "); Serial.println(TempY);
if (High < .1) {
Dec = 3;
}
else if (High <= 1) {
Dec = 2;
}
else if (High <= 10) {
Dec = 1;
}
else {
Dec = 0;
}
data = High - ( i * (Inc / stepval));
dtostrf(data, 0, Dec,text);
tLen = d->strPixelLen(text) * 1.2;
tHi =sf.cap_height;
d->setCursor(gx + gw + 12, TempY - (tHi / 2) );
d->print(text);
}
}
if (st){
d->setTextColor(tc, bc);
d->setFont(tf);
tHi =sf.cap_height * 2 + 5;
d->setCursor(gx , gy - gh -tHi );
d->print(ti);
}
}
// compute level of bar graph that is scaled to the height and the hi and low vals
// this is needed to accompdate for +/- range
if (val >= High) {
val = High;
}
if (val <= Low) {
val = Low;
}
level = (gh * (((val - Low) / (High - Low))));
// draw the bar graph
// write a upper and lower bar to minimize flicker cause by blanking out bar and redraw on update
d->fillRect(gx+1, gy - gh, gw - 2, gh - level, ac);
d->fillRect(gx+1, gy - level , gw - 2, level, rc);
d->drawRect(gx , gy - gh - 1 , gw, gh+2, oc);
}
*/
void BarChartV::refresh(){
redraw = true;
}
void BarChartV::setBarColor(uint16_t BarColor){
rc = BarColor;
}
void BarChartV::showTitle(bool val){
st = val;
}
void BarChartV::showScale(bool val){
ss = val;
}
void BarChartV::setScale(float ScaleLow, float ScaleHigh, float ScaleInc){
Low = ScaleLow;
High = ScaleHigh;
Inc = ScaleInc;
redraw = true;
}
/*//////////////////////////////////////////////////////////////////////////////////////////////////////////
cartesian style graphing functions
*///////////////////////////////////////////////////////////////////////////////////////////////////////////
CGraph::CGraph(ILI9341_t3 *disp, float GraphXLoc, float GraphYLoc, float GraphWidth, float GraphHeight, float XAxisLow, float XAxisHigh, float XAxisInc, float YAxisLow, float YAxisHigh, float YAxisInc){
d = disp;
XLow = XAxisLow;
XHigh = XAxisHigh;
XInc = XAxisInc;
YLow = YAxisLow;
YHigh = YAxisHigh;
YInc = YAxisInc;
gx = GraphXLoc;
gy = GraphYLoc;
gw = GraphWidth;
gh = GraphHeight;
}
void CGraph::init(const char *Title, const char *XAxis, const char *YAxis, uint16_t TextColor, uint16_t GridColor, uint16_t AxisColor, uint16_t BackColor, uint16_t PlotColor, const ILI9341_t3_font_t &TitleFont , const ILI9341_t3_font_t &AxisFont ){
strncpy(title, Title, 40);
strncpy(xatitle, XAxis, 40);
strncpy(yatitle, YAxis, 40);
tf = TitleFont;
af = AxisFont;
tc = TextColor;
gc = GridColor;
ac = AxisColor;
bc = BackColor;
pc = PlotColor;
st = true;
sl = true;
sal = true;
sxs = true;
sys = true;
XScaleOffset = 5;
YScaleOffset = 40;
XTextScale = 1.0;
YlegendOffset = 0;
Delta = XHigh - XLow;
RedrawGraph = true;
TextHeight = tf.cap_height;
}
int CGraph::add(const char *name, uint16_t color){
// max number of plots is 10
if (ID >= 10){
return -1;
}
pdia[ID] = 0;
linet[ID] = 1;
strncpy(dl[ID], name, 30);
dc[ID] = color;
HaveFirstPoint[ID] = false;
ID++;
return ID-1;
}
void CGraph::setX(float xpoint){
x = xpoint;
}
void CGraph::setYLegendOffset(int val){
YlegendOffset = val;
}
void CGraph::showAxisLabels(bool val){
sal = val;
}
void CGraph::plot(int cID, float y){
if (RedrawGraph){
RedrawGraph = false;
drawGraph();
}
// plot the data
XPoint = MapFloat(x, XLow, XHigh, gx, gx + gw);
YPoint = MapFloat(y, YHigh, YLow, gy - gh, gy);
if ((YPoint > gy)) {
YPoint = gy;
}
if (YPoint < (gy - gh)) {
YPoint = gy - gh;
}
if ((XPoint > gx) && (XPoint < gx + gw)) {
if (HaveFirstPoint[cID]){
for(j = 0; j < linet[cID]; j++){
d->drawLine(oXPoint[cID], oYPoint[cID]+j, XPoint, YPoint+j, dc[cID]);
}
// d->drawLine(oXPoint[cID], oYPoint[cID], XPoint, YPoint, dc[cID]);
if ( pdia[cID] > 1){
d->fillCircle(XPoint, YPoint, pdia[cID], dc[cID]);
// d->fillRect(XPoint - pdia[cID]/2, YPoint- pdia[cID]/2, pdia[cID], pdia[cID], dc[cID]);
}
}
}
HaveFirstPoint[cID] = true;
oYPoint[cID] = YPoint;
oXPoint[cID] = XPoint;
// test to see if we need to redraw
if (XPoint + 2 > gx + gw) {
Delta = XHigh - (XLow);
XLow = XHigh;
XHigh = XHigh + Delta;
RedrawGraph = true;
HaveFirstPoint[cID] = false;
}
}
void CGraph::setMarkerSize(int cID, byte val){
pdia[cID] = val;
}
void CGraph::setLineThickness(int cID, byte val){
linet[cID] = val;
}
void CGraph::setTitle(const char *Title){
strncpy(title, Title, 40);
}
void CGraph::setXAxisName(const char *XAxis){
strncpy(xatitle, XAxis, 40);
}
void CGraph::setXTextOffset(int val){
XScaleOffset = val;
}
void CGraph::setYTextOffset(int val){
YScaleOffset = val;
}
void CGraph::setXTextScale(float val){
XTextScale = val;
}
void CGraph::setYAxisName(const char *YAxis){
strncpy(yatitle, YAxis, 40);
}
void CGraph::resetStart(int ID){
HaveFirstPoint[ID] = false;
}
void CGraph::drawLegend(byte Location){
tl = Location;
}
void CGraph::drawGraph() {
RedrawGraph = false;
float xDiv = ((XHigh-XLow)/XInc);
float yDiv = ((YHigh-YLow)/YInc);
float ylen = gh / yDiv;
float xlen = gw / xDiv;
d->setTextColor(tc, bc);
// draw title
if (st){
d->setFont(tf);
d->setCursor(gx, gy - gh - TextHeight-10);
d->print(title);
}
// draw grid lines
// first blank out xscale for redrawing
d->fillRect(gx-10, gy+2, gw+20,25, bc);
d->setFont(af);
d->fillRect(gx, gy - gh-4, gw, gh+8, bc);
d->fillRect(gx, gy - gh, gw, gh, pc);
// draw vertical lines
for (j = 0; j <= xDiv; j++) {
if(j > 0){
d->drawFastVLine(gx + ((0+j) * xlen), gy - gh, gh, gc);
}
if (xDiv < .1) {
XDec = 2;
}
else if (xDiv < 1) {
XDec = 1;
}
else {
XDec = 0;
}
//get text offsets
if (sxs){
dtostrf((XLow+(XInc*j)) * XTextScale, 0, XDec,text);
d->setCursor(gx + (j * xlen)- (d->measureTextWidth(text)/2), gy+XScaleOffset);
d->print(text);
}
}
d->fillRect(gx-30, gy -gh-TextHeight+4, 27, gh+TextHeight, bc);
// draw horizontal lines
for (i = 0; i <= yDiv; i++) {
d->drawFastHLine(gx, gy - (ylen * (0+i)), gw, gc);
if (YInc < .1) {
YDec = 2;
}
else if (YInc < 1) {
YDec = 1;
}
else {
YDec = 0;
}
if (sys){
dtostrf(YLow+(YInc*i), 0, YDec,text);
d->setCursor(gx-YScaleOffset, gy - (ylen * i)-(d->measureTextHeight(text)/2));
//d->setCursor(gx + (j * xlen)- (d->measureTextWidth(text)/2), gy+XScaleOffset);
d->print(text);
}
}
// put the y axis at the zero point
if ((YLow < 0) && (YHigh > 0)) {
YPoint = MapFloat(0, YHigh, YLow, gy - gh, gy);
}
else {
YPoint = MapFloat(YLow, YHigh, YLow, gy - gh, gy);
}
d->drawFastHLine(gx, YPoint, gw, ac);
d->drawFastHLine(gx, YPoint-1, gw, ac);
d->drawFastVLine(gx-1, gy - gh, gh+1, ac);
d->drawFastVLine(gx-2, gy - gh, gh+1, ac);
// draw legend
if (sal){
// draw y label
oOrientation = d->getRotation();
d->setTextColor(tc, bc);
d->setRotation(oOrientation - 1);
d->setCursor(d->width()-gy,gx-44);
d->print(yatitle);
d->setRotation(oOrientation);
//Serial.println(yatitle);
// draw x label
d->setTextColor(tc, bc);
d->setCursor(gx,gy+ TextHeight + 5);
d->print(xatitle);
//Serial.println(xatitle);
}
if (sl) {
// draw legend
StartPointX = gx-20;
StartPointX = gx + d->measureTextWidth(xatitle) + 10;
if (tl == LOCATION_TOP){
StartPointY = gy - gh;
}
else if (tl == LOCATION_BOTTOM) {
StartPointY = gy+ TextHeight + YlegendOffset;
}
for (k = 0; k <= ID; k++){
d->setCursor(StartPointX, StartPointY);
d->print(dl[k]);
StartPointX = d->getCursorX();
d->fillRect(StartPointX+3, StartPointY+TextHeight/4 , 20, linet[k], dc[k]);
StartPointX += 30;
}
}
}
void CGraph::setYAxis(float Ylow, float Yhigh, float Yinc){
YLow = Ylow;
YHigh = Yhigh;
YInc = Yinc;
RedrawGraph = true;
}
void CGraph::setXAxis(float XAxisLow, float XAxisHigh, float XAxisInc){
XLow = XAxisLow;
XHigh = XAxisHigh;
XInc = XAxisInc;
RedrawGraph = true;
}
void CGraph::showTitle(bool val){
st = val;
}
void CGraph::showLegend(bool val){
sl = val;
}
void CGraph::showXScale(bool val){
sxs = val;
}
void CGraph::showYScale(bool val){
sys = val;
}
/*//////////////////////////////////////////////////////////////////////////////////////////////////////////
dial type control
*///////////////////////////////////////////////////////////////////////////////////////////////////////////
Dial::Dial(ILI9341_t3 *disp, int CenterX, int CenterY, int DialRadius, float LowVal , float HiVal , float ValInc, float SweepAngle){
degtorad = .0174532778;
d = disp;
cx = CenterX;
cy = CenterY;
dr = DialRadius;
lv = LowVal;
hv = HiVal;
inc = ValInc;
sa = SweepAngle;
// store initial values
// this looks silly but we don't have needle size calculated yet but to keep needle from first draw being weird, just make a dot at the center
px = CenterX;
py = CenterY;
pix = CenterX;
piy = CenterY;
plx = CenterX;
ply = CenterY;
prx = CenterX;
pry = CenterY;
Redraw = true;
}
void Dial::init(uint16_t NeedleColor, uint16_t DialColor, uint16_t TextColor, uint16_t TickColor, const char *Title, const ILI9341_t3_font_t &TitleFont , const ILI9341_t3_font_t &DataFont ) {
tf = TitleFont;
df = DataFont;
strncpy(t, Title, 10);
nc = NeedleColor;
dc = DialColor;
tc = TextColor;
ic = TickColor;
}
void Dial::draw(float Val) {
// draw the dial only one time--this will minimize flicker
if ( Redraw == true) {
Redraw = false;
d->fillCircle(cx, cy, dr , dc);
d->drawCircle(cx, cy, dr, ic);
d->drawCircle(cx, cy, dr - 1, ic);
}
// draw the current value
d->setFont(df);
d->setTextColor(tc, dc);
d->setCursor(cx - 25, cy + 20 );
//disp.println(Format(curval, dig, dec));
// center the scale about the vertical axis--and use this to offset the needle, and scale text
offset = (270 + (sa / 2)) * degtorad;
// find hte scale step value based on the hival low val and the scale sweep angle
// deducting a small value to eliminate round off errors
// this val may need to be adjusted
stepval = (inc) * (sa / (float (hv - lv)));
// draw the scale and numbers
// note draw this each time to repaint where the needle was
// first draw the previous needle in dial color to hide it
d->fillTriangle (pix, piy,plx, ply, prx, pry, dc);
for (i = 0.0; i <= (sa + 0.0001); i += stepval) {
angle = ( i * degtorad);
angle = offset - angle ;
ox = (float) (dr - 2) * cos(angle) + cx;
oy = (float) (dr - 2) * sin(angle) + cy;
ix = (float) (dr - 10) * cos(angle) + cx;
iy = (float) (dr - 10) * sin(angle) + cy;
tx = (float) (dr - 30) * cos(angle) + cx;
ty = (float) (dr - 30) * sin(angle) + cy;
dx = (float) (dr - 20) * cos(angle) + cx;
dy = (float) (dr - 20) * sin(angle) + cy;
d->drawLine(ox, oy, ix, iy, ic);
if (hv < .1) {
dec = 3;
}
else if (hv <= 1) {
dec = 2;
}
else if (hv <= 10) {
dec = 1;
}
else {
dec = 0;
}
data = hv - ( i * (inc / stepval)) ;
dtostrf(data, 0, dec,buf);
tLen = d->strPixelLen(buf);
tHi = df.cap_height;
d->setCursor(dx - (tLen/2), dy - (tHi/2));
d->print(buf);
}
// compute and draw the needle
angle = (sa * (1.0 - (((Val - lv) / (hv - lv)))));
angle = angle * degtorad;
angle = offset - angle ;
// draw a triangle for the needle (compute and store 3 vertiticies)
// 5.0 is width of needle at center
ix = (float)(dr - 10.0) * cos(angle) + cx;
iy = (float)(dr - 10.0) * sin(angle) + cy;
lx = 6.0 * cos(angle - 90.0 * degtorad) + cx;
ly = 6.0 * sin(angle - 90.0 * degtorad) + cy;
rx = 6.0 * cos(angle + 90.0 * degtorad) + cx;
ry = 6.0 * sin(angle + 90.0 * degtorad) + cy;
// then draw the new needle in need color to display it
d->fillTriangle (ix, iy, lx, ly, rx, ry, nc);
// draw a cute little dial center
d->fillCircle(cx, cy, 8, tc);
// print the title
d->setTextColor(tc, dc);
d->setFont(tf);
tLen = d->strPixelLen(t);
d->setCursor(cx - tLen/2, cy + 10);
d->println(t);
//save all current to old so the previous dial can be hidden
pix = ix;
piy = iy;
plx = lx;
ply = ly;
prx = rx;
pry = ry;
}
/*
class for a vertical type slider, you pass in the coordinates for placement and colors, we'll pass in scale during initilization as scale may depend on some computed value
*/
SliderV::SliderV(ILI9341_t3 *Display)
{
// map arguements to class variables
d =Display;
}
/*
initializer for the vertical slider, here we pass in the scale values
note user can specify a scale (0 for none), and a snap capability (0 for none). You can draw a 0-100 scale with tick marks every 25 but snap to each integer (1,2,3...)
*/
void SliderV::init(uint16_t SliderX, uint16_t SliderY, uint16_t SliderH, float ScaleLow, float ScaleHi, float ScaleSize, float SnapSize,uint16_t SliderColor, uint16_t BackgroundColor, uint16_t HandleColor ) {
// map arguements to class variables
sl = ScaleLow;
sh = ScaleHi;
sc = 0.0;
sn = 0.0;
oy = -1;
colorscale = true;
handlesize = SLIDER_HANDLE_SIZE;
handlewidth = handlesize / 2;
handleshape = HANDLE_CIRCLE;
enabled = true;
visible = true;
l = SliderX;
t = SliderY;
h = SliderH;
bt = 3;
sColor = SliderColor;
bColor = BackgroundColor;
hColor = HandleColor;
debounce = TFT_DEBOUNCE;
dsColor = C_DISABLE_MED;
dhColor = C_DISABLE_LIGHT;
// compute scale increments and snap increments
if (ScaleSize != 0) {