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gpstrek - Cache some values and draw less often

master
Martin Boonk 2022-11-02 18:02:47 +01:00
parent fff2e41874
commit 8f2fcf38ca
1 changed files with 25 additions and 12 deletions
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37
apps/gpstrek/app.js
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@ -109,9 +109,15 @@ let matchFontSize = function(graphics, text, height, width){
let getDoubleLineSlice = function(title1,title2,provider1,provider2,refreshTime){
let lastDrawn = Date.now() - Math.random()*refreshTime;
let lastValue1 = 0;
let lastValue2 = 0;
return {
refresh: function (){
return Date.now() - lastDrawn > (Bangle.isLocked()?(refreshTime?refreshTime:5000):(refreshTime?refreshTime*2:10000));
let bigChange1 = (Math.abs(lastValue1 - provider1()) > 1);
let bigChange2 = (Math.abs(lastValue2 - provider2()) > 1);
let refresh = (Bangle.isLocked()?(refreshTime?refreshTime*5:10000):(refreshTime?refreshTime*2:1000));
let old = (Date.now() - lastDrawn) > refresh;
return (bigChange1 || bigChange2) && old;
},
draw: function (graphics, x, y, height, width){
lastDrawn = Date.now();
@ -119,19 +125,19 @@ let getDoubleLineSlice = function(title1,title2,provider1,provider2,refreshTime)
if (typeof title2 == "function") title2 = title2();
graphics.clearRect(x,y,x+width,y+height);
let value = provider1();
matchFontSize(graphics, title1 + value, Math.floor(height*0.5), width);
lastValue1 = provider1();
matchFontSize(graphics, title1 + lastValue1, Math.floor(height*0.5), width);
graphics.setFontAlign(-1,-1);
graphics.drawString(title1, x+2, y);
graphics.setFontAlign(1,-1);
graphics.drawString(value, x+width, y);
graphics.drawString(lastValue1, x+width, y);
value = provider2();
matchFontSize(graphics, title2 + value, Math.floor(height*0.5), width);
lastValue2 = provider2();
matchFontSize(graphics, title2 + lastValue2, Math.floor(height*0.5), width);
graphics.setFontAlign(-1,-1);
graphics.drawString(title2, x+2, y+(height*0.5));
graphics.setFontAlign(1,-1);
graphics.drawString(value, x+width, y+(height*0.5));
graphics.drawString(lastValue2, x+width, y+(height*0.5));
}
};
};
@ -141,7 +147,7 @@ let getTargetSlice = function(targetDataSource){
let lastDrawn = Date.now() - Math.random()*3000;
return {
refresh: function (){
return Date.now() - lastDrawn > (Bangle.isLocked()?10000:3000);
return Date.now() - lastDrawn > (Bangle.isLocked()?3000:10000);
},
draw: function (graphics, x, y, height, width){
lastDrawn = Date.now();
@ -225,10 +231,15 @@ let drawCompass = function(graphics, x, y, height, width, increment, start){
let getCompassSlice = function(compassDataSource){
let lastDrawn = Date.now() - Math.random()*2000;
let lastDrawnValue = 0;
const buffers = 4;
let buf = [];
return {
refresh : function (){return Bangle.isLocked()?(Date.now() - lastDrawn > 2000):true;},
refresh : function (){
let bigChange = (Math.abs(lastDrawnValue - compassDataSource.getCourse()) > 2);
let old = (Bangle.isLocked()?(Date.now() - lastDrawn > 2000):true);
return bigChange && old;
},
draw: function (graphics, x,y,height,width){
lastDrawn = Date.now();
const max = 180;
@ -236,8 +247,10 @@ let getCompassSlice = function(compassDataSource){
graphics.clearRect(x,y,x+width,y+height);
let start = compassDataSource.getCourse() - 90;
if (isNaN(compassDataSource.getCourse())) start = -90;
lastDrawnValue = compassDataSource.getCourse();
var start = lastDrawnValue - 90;
if (isNaN(lastDrawnValue)) start = -90;
if (start<0) start+=360;
start = start % 360;
@ -250,7 +263,7 @@ let getCompassSlice = function(compassDataSource){
if (compassDataSource.getPoints){
for (let p of compassDataSource.getPoints()){
let bpos = p.bearing - compassDataSource.getCourse();
var bpos = p.bearing - lastDrawnValue;
if (bpos>180) bpos -=360;
if (bpos<-180) bpos +=360;
bpos+=120;