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barclock: simplify redraw logic

master
Richard de Boer 2021-10-02 15:11:32 +02:00
parent 346eb8f77b
commit de3feaff45
1 changed files with 10 additions and 27 deletions
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37
apps/barclock/clock-bar.js
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@ -110,19 +110,17 @@ const drawBar = function(date) {
g.setColor(g.theme.fg2).fillRect(0, b.top, width, b.top+b.thickness);
};
const clearScreen = function() {
const timeTop = settings.time.middle-(settings.time.size*4);
g.clearRect(0, timeTop, screen.width, screen.height);
};
let lastSeconds, tTick;
const tick = function() {
let lastSeconds;
const draw = function(redraw) {
if (!Bangle.isLCDOn()) {return;}
g.reset();
const date = new Date();
const seconds = date.getSeconds();
if (lastSeconds>seconds) {
// new minute
clearScreen();
if (redraw||lastSeconds>seconds) {
// force redraw at start of new minute
g.clear();
Bangle.drawWidgets();
drawDateTime(date);
}
// the bar only gets larger, so drawing on top of the previous one is fine
@ -130,32 +128,17 @@ const tick = function() {
lastSeconds = seconds;
// schedule next update
const millis = date.getMilliseconds();
tTick = setTimeout(tick, 1000-millis);
setTimeout(draw, 1000-millis);
};
const start = function() {
lastSeconds = 99; // force redraw
tick();
};
const stop = function() {
if (tTick) {
clearTimeout(tTick);
tTick = undefined;
}
};
// clean app screen
g.clear();
Bangle.loadWidgets();
Bangle.drawWidgets();
// Show launcher when button pressed
Bangle.setUI("clock");
Bangle.on("lcdPower", function(on) {
if (on) {
start();
} else {
stop();
draw(true);
}
});
start();
draw(true);