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libslider: refactor to split logic and graphics

master
thyttan 2023-08-08 20:38:22 +02:00
parent 91055f17cc
commit d25f09d7ca
1 changed files with 26 additions and 23 deletions
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47
apps/libslider/lib.js
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@ -1,33 +1,47 @@
exports.interface = function(cb, useMap, useIncr) {
// TODO: make configurable
// Constants for the indicator:
const X_START = 87;
const X_START = 176-55;
const WIDTH = 50;
const Y_START = 5;
const HEIGHT = 165;
const STEPS = 30; //Currently corresponds to my phones volume range, from 0 to 30. Maybe it should be 31. Math is hard sometimes...
const STEP_SIZE = HEIGHT/STEPS;
const OVERSIZE = 0.5;
const OVERSIZE = 0.65;
// Initialize the level
let level = 0; // TODO: Depend on parameter.
let lastLevel;
let level; // TODO: Depend on parameter.
let lastLevel=10;
let levelHeight;
let continDrag = (e)=>{
let continDrag = e=>{
"ram";
if (timeout) {clearTimeout(timeout); timeout = setTimeout(remove, 1000*1);}
let input = Math.min(e.y,170);
input = Math.round(input/STEP_SIZE);
// If draging on the indicator, adjust one-to-one.
if (useMap && e.x>X_START-OVERSIZE*WIDTH && e.x<X_START+OVERSIZE*WIDTH) {
draw('map', e.y);
} else if (useIncr) {
level = Math.min(Math.max(STEPS-input,0),STEPS);
cb("map",level);
draw(level);
} else if (useIncr) { // Heavily inspired by "updown" mode of setUI.
dy += e.dy;
//if (!e.b) dy=0;
let incr;
while (Math.abs(dy)>32) {
if (dy>0) { dy-=32; draw('incr',1); cb("incr",1); }
else { dy+=32; draw('incr',-1); cb("incr",-1); }
if (dy>0) { dy-=32; incr = 1;}
else { dy+=32; incr = -1;}
Bangle.buzz(20);
level = Math.min(Math.max(lastLevel-incr,0),STEPS);
cb("incr",incr);
draw(level);
}
}
E.stopEventPropagation&&E.stopEventPropagation();
@ -35,9 +49,8 @@ let continDrag = (e)=>{
let ovr = Graphics.createArrayBuffer(WIDTH,HEIGHT,1,{msb:true});
let draw = (mode, input)=>{
let draw = (level)=>{
"ram";
input = Math.min(input,170);
// Draw the indicator.
// Should be displayed when a relevant drag event is detected.
// Should time out.
@ -45,16 +58,7 @@ let draw = (mode, input)=>{
// Pauses and resets the time out when interacted with.
// TODO: Lazy, keep track of last level and only draw again if it changed.
if (mode=='incr') {
level = Math.min(Math.max(level-input,0),STEPS);
}
if (mode=='map') {
input = Math.round(input/STEP_SIZE);
level = Math.min(Math.max(STEPS-input,0),STEPS);
if (level == lastLevel) return;
cb("map",level);
}
if (level == lastLevel) {print("hi"); return;}
levelHeight = level==0?WIDTH:level*STEP_SIZE; // Math.max(level*STEP_SIZE,STEP_SIZE);
lastLevel = level;
@ -86,5 +90,4 @@ let timeout = setTimeout(remove, 1000*1);
let dy = 0;
g.reset();
Bangle.prependListener('drag', continDrag);
}