BangleApps/apps/dtlaunch/app-b2.js

{ // must be inside our own scope here so that when we are unloaded everything disappears

/* Desktop launcher
*
*/

let settings = Object.assign({
  showClocks: true,
  showLaunchers: true,
  direct: false,
  oneClickExit:false,
  swipeExit: false,
  fastload: false,
}, require('Storage').readJSON("dtlaunch.json", true) || {});

if( settings.oneClickExit)
  setWatch(_=> returnToClock, BTN1);
  
let s = require("Storage");
  var apps = s.list(/\.info$/).map(app=>{
  let a=s.readJSON(app,1);
  return a && {
    name:a.name, type:a.type, icon:a.icon, sortorder:a.sortorder, src:a.src
  };}).filter(
    app=>app && (app.type=="app" || (app.type=="clock" && settings.showClocks) || (app.type=="launch" && settings.showLaunchers) || !app.type));
  
apps.sort((a,b)=>{
  let n=(0|a.sortorder)-(0|b.sortorder);
  if (n) return n; // do sortorder first
  if (a.name<b.name) return -1;
  if (a.name>b.name) return 1;
  return 0;
});
apps.forEach(app=>{
    if (app.icon)
      app.icon = s.read(app.icon); // should just be a link to a memory area
  });

let Napps = apps.length;
let Npages = Math.ceil(Napps/4);
let maxPage = Npages-1;
let selected = -1;
let oldselected = -1;
let page = 0;
const XOFF = 24;
const YOFF = 30;

function draw_icon(p,n,selected) {
    let x = (n%2)*72+XOFF; 
    let y = n>1?72+YOFF:YOFF;
    (selected?g.setColor(g.theme.fgH):g.setColor(g.theme.bg)).fillRect(x+11,y+3,x+60,y+52);
    g.clearRect(x+12,y+4,x+59,y+51);
    g.setColor(g.theme.fg);
    try{g.drawImage(apps[p*4+n].icon,x+12,y+4);} catch(e){}
    g.setFontAlign(0,-1,0).setFont("6x8",1);
    let txt =  apps[p*4+n].name.replace(/([a-z])([A-Z])/g, "$1 $2").split(" ");
    let lineY = 0;
    let line = "";
    while (txt.length > 0){      
      let c = txt.shift();
      
      if (c.length + 1 + line.length > 13){
        if (line.length > 0){
          g.drawString(line.trim(),x+36,y+54+lineY*8);
          lineY++;
        }
        line = c;
      } else {
        line += " " + c;
      }
    }
    g.drawString(line.trim(),x+36,y+54+lineY*8);
}

function drawPage(p){
    g.reset();
    g.clearRect(0,24,175,175);
    let O = 88+YOFF/2-12*(Npages/2);
    for (let j=0;j<Npages;j++){
        let y = O+j*12;
        g.setColor(g.theme.fg);
        if (j==page) g.fillCircle(XOFF/2,y,4);
        else g.drawCircle(XOFF/2,y,4);
    }
    for (let i=0;i<4;i++) {
        if (!apps[p*4+i]) return i;
        draw_icon(p,i,selected==i && !settings.direct);
    }
    g.flip();
}

function swipeListenerDt(dirLeftRight, dirUpDown){
    selected = 0;
    oldselected=-1;
    if(settings.swipeExit && dirLeftRight==1) returnToClock();
    if (dirUpDown==-1||dirLeftRight==-1){
        ++page; if (page>maxPage) page=0;
        drawPage(page);
    } else if (dirUpDown==1||(dirLeftRight==1 && !settings.swipeExit)){
        --page; if (page<0) page=maxPage;
        drawPage(page);
    }
}
Bangle.on("swipe",swipeListenerDt);

function isTouched(p,n){
    if (n<0 || n>3) return false;
    let x1 = (n%2)*72+XOFF;  let y1 =  n>1?72+YOFF:YOFF;
    let x2 = x1+71; let y2 = y1+81;
    return (p.x>x1 && p.y>y1 && p.x<x2 && p.y<y2);
}

function touchListenerDt(_,p){
    let i;
    for (i=0;i<4;i++){
        if((page*4+i)<Napps){
            if (isTouched(p,i)) {
                draw_icon(page,i,true && !settings.direct);
                if (selected>=0 || settings.direct) {
                    if (selected!=i && !settings.direct){
                        draw_icon(page,selected,false);
                    } else {
                        loadApp(apps[page*4+i].src);
                    }
                }
                selected=i;
                break;
            }
        }
    }
    if ((i==4 || (page*4+i)>Napps) && selected>=0) {
        draw_icon(page,selected,false);
        selected=-1;
    }
}
Bangle.on("touch",touchListenerDt);
  
const returnToClock = function() { // Delete virtually everything, don't know if some deletes are unnecessary. 
  Bangle.setUI();
  if (watch) clearWatch(watch);
  delete s;
  delete a;
  delete n;
  delete Napps;
  delete Npages;
  delete maxPage;
  delete selected;
  delete oldselected;
  delete page;
  delete XOFF;
  delete YOFF;
  delete x;
  delete y;
  delete txt;
  delete lineY;
  delete line;
  delete c;
  delete O;
  delete x1;
  delete x2;
  delete i;
  Bangle.removeListener("swipe", swipeListenerDt);
  Bangle.removeListener("touch", touchListenerDt);
  var apps = [];
  delete apps;
  delete returnToClock;
  delete settings;
  delete watch;
  delete loadApp;
  setTimeout(eval, 0, s.read(".bootcde"));
  };
  
  let watch;
  let loadApp;
  loadApp = function(name) {
    load(name);
  };

Bangle.loadWidgets();
g.clear();
Bangle.drawWidgets();
drawPage(0);
  
} // end of app scope