UI Example - Slider for Pixl.js
Source Code
// ----- setup lon and log() (considering emulating _eConsole)
var lon = true // logging is on / off
, log = function() { if (lon) { var lgr;(lgr=(typeof _eConsole
=="object")?_eConsole:console).log.apply(lgr,arguments);}};
// ----- pull in ui base and ui element(s) - (..._U = uncommented)
var ui = require("ui") // basic module _U(ncommented)
.adx(require("uiExt")) // basic extension
.adx(require("uiEBC")) // button controlled ui extension
.adx(require("uiSli")) // ui radio button element
.adx(require("Font6x8"),-2,"Font6x8") // pixl suitable small bitmap font
;
//------- uiPBt - push button vs touch screen---------------------------
// define Pixl Button 'clazz'
var uiPBt = function(btn,downCb,upCb,debounce) {
var t=0;
setWatch( function(e){ if (! t) { t=Math.round(e.time*1000); if (downCb) downCb(t); }}
, btn, {edge:"rising" ,repeat:true, debounce:debounce} );
setWatch( function(e){ if ( t) { upCb(Math.round(e.time*1000)-t); t=0; }}
, btn, {edge:"falling",repeat:true,debounce:debounce} );
};
// ----- define callback(s): preferred (untouch) / generic (all) touch event(s)
var cb = function(id, v, _, e, t) { log( "id:",id,"val:",v
,(t)?((t.t)?"":"un")+"touch focused":t); }
, ca = ( (typeof ca === "undefined")
? function(id, v, _, e, t) { var s=(t.f|65536).toString(2); // log flags
log("c:",e[1],"c:",e[1],"id:",id,"v:",v,"f:",[s.substr(5,4),s.substr(9,4),s.substr(13,4)].join(" "),t.f); }
: ca )
, backlite = function(id, v, e, t) { // turn backlight on / off w/ label change
digitalWrite(LED,v); // e[11][4]=(v)?"off":"on"; // set LED and label
return false; } // return true/y in callback redraws ui elt & label(s)
, u; // for space / memory / var saving value of * undefined *
// ----- define UI (in level 0 - built to be saved)
//---------- Slider examples ----------
//
//....0 1 2 3 4 5 6 7 8 9 10 11 12
//.flgs clazz id x y w h bc fcs value cb, ls (arr of label ([[...],..]))
// sli ->x2->y2 [0] fs tc x y txt fmt
ui.c( 3,"sli","s1" , 26, 23,103, 9, 0,[0,7], 0, cb, u, u, u, u, u, u,
// min max si
-10, 10,[0]);
//
var s2 = // hold on to "s2" slider ui element for direct access app later on.
//....0 1 2 3 4 5 6 7 8 9 10 11 12
//.flgs clazz id x y w h bc fcs value cb, ls (arr of label ([[...],..]))
// sli ->x2->y2 [0] fs tc x y txt fmt
ui.c( 3,"sli","s2" , 26, 32,103, 13, 0,[0,7], 33, ca, [[ 0, u, 40, 4, u // formater
,function(v,_,l){ // val,ui,labl
var s="", f=_.te.f; return (!(f===0 || f&184)) ? s : ((v<1)?"0":"") // 128+32+16+8
+(s=_.mr(v*10)+"%").substr(0,s.length-2)+"."+s.substr(-2); } // val label
// _.mr()=Math.round min max si o a flgs
, 0,100,[3],0,1, 168]
]);
//....0 1 2 3 4 5 6 7 8 9 10 11 12
//.flgs clazz id x y w h bc fcs value cb, ls (arr of label ([[...],..]))
// sli ->x2->y2 [0] fs tc x y txt fmt
ui.c( 3,"sli","s3" , 26, 48,103, 16, 0,[0,7], 66, ca, [[ 0, u, 28, 7, u // formatter
,function(v,_,l){ // val,ui,labl
var s="", f=_.te.f; return (!(f===0 || f&184)) ? s : ((v<1)?"0":"") // 128+32+16+8
+(s=_.mr(v*10)+"%").substr(0,s.length-2)+"."+s.substr(-2); } // val label
// _.mr()=Math.round min max s o a flgs
, 0,100,[3],0,1, 168
// left top right bot margins
, 13, 3, 13, 0]
// [>0] fs tc x y txt
,[ 0, 0, 2, 7, "%:0"] // frnt
,[ 0, 0, 89, 7, "100"] // back
]);
//....0 1 2 3 4 5 6 7 8 9 10 11 12
//.flgs clazz id x y w h bc fcs value cb, ls (arr of labels [[...],..])
//.......sli ->x2->y2 [0] fs tc x y txt fmt
ui.c( 3,"sli","s4" , 0, 1, 21, 63, 0,[ 0, 7], 6, cb, [[ 0, u, 3, u, "" // y val dep
,function(v,_,l){ // val,ui,labl
var s="",y, f=_.te.f; if (f===0 || f&184) { // 128+32+16+8
s=((_.mu(s=_.mr(v))<10)?" ":"")+((s<0)?s:"+"+s)+l[4]; l[1]=0; // ./ clr+pos val dependnt:
if ((l[3]=_.mr(62/2-v*(62-2-2)/(10-(-10)))-6)<2+3) { l[1]=7; l[3]+=8; } } return s; }
// min max si o a flgs
,-10, 10,[3],1,0, 168
// left top right bot margins
, 0, 0, 2, 0]
// [>0] fs tc x y txt fmt
,[ 0, 0, 29, 0, "v max $&*@"]
,[ 0, 0, 21, 45, "m"]
,[ 0, 0, 21, 51, "i"]
,[ 0, 0, 21, 57, "n"]
]);
//---------- extra drawings ----------
//
// function for extra / complementary drawings on initial and re-drawings
// of display, such as:
var xDs = function(ui) { // e (2nd arg of no use on draw all)
var d = ui.dsp, e; // display - Espruino Graphics object
// - ticks for slider ui elts (that have margins to put them)
ticks_s3(ui,d,ui.e("s3")); // get slider w/ id s3 as ui element e
ticks_s4(ui,d,ui.e("s4")); // get slider w/ id s4 as ui element e
// ui.ld([0,0,40,10,"*@"]); ui.ld([-1,0,64,8,"#$%&*@"]); // suggested 4x6 and 6x8 font changes...
// ...more extra drawings...
// ..
// .
};
function ticks_s3(ui,d,e) { if (e) { // horizontal slider
var x = e[3] // get e's left - x
, m = e[11][0] // to access margins 12,13,14/left,top,right
, b = x+2+m[12] // start of slider bar (border, value 0)
, l = e[4]+2+m[13] // get e's top-1=y-1=lower y of tick (1 pixel above bar)
, w = e[5]-b-2-1-m[14] // get e's slider bar width (right border (-1?), val 100)
, v = w/100 // pixels per 1% (100% = w pixels)
, u = l-3 // upper y of tick, use all 4 margin pixels betw. bar & sel/focus line
, t // tick pos
;
ui.clr(e[7]); // same as slider bar's border color
for (var i=0;i<=100;i+=10) {
t = ui.mc(b + i * v) + 0.5; // weird +0.5, only in emulation / canvas
d.drawLine(t,l-((i % 50)?1:0),t,u-((i % 50)?0:2)); // short (2px) and long (4px) ticks
} } }
function ticks_s4(ui,d,e) { if (e) { // vertical slider
var y = e[4] // get e's top - y
, m = e[11][0] // to access margins 13,14,15/top,right,bottom and min and max
, b = e[6]-2-m[15] // start of slider bar (bottom border value -10)
, l = e[5]-1-m[14] // get e's right-1=y-1=left x of tick (1 pixel right to the bar)
, w = b-y-2-m[13] // get e's slider bar height (top border (-1?), val +10)
, v = w/20 // pixels per unit - v pixels)
, r = l+2 // right x of tick, use all 4 margin pixels betw. bar & bounding box rect
, mn = m[6] // minimum value
, mx = m[7] // maximum value
, t // tick pos
;
for (var i=mn;i<=mx;i+=5) {
t = ui.mr(b - (i - mn) * v) + 0.5; // weird +0.5, only in emulation / canvas
ui.clr(e[7]); d.drawLine(l,t,r-((i % 10)?1:0),t); // ticks
if (i>=0) ui.ld([0,0,r+2,t-2,i]); // numbers where space is available
} } }
//----- Pixl sepcifics
var dsp = g, dspW=128, dspH=64 // ...to keep var names as usual
;
ui.bc=7; // set ui background color to white
ui.tc=0; // set ui touch color to black
ui.clrs= // set white to pixl color
[function(c,i){ var v=(i)?c^7:c; return (v&&4)?[0,0,0]:[1,1,1]; }.bind(ui)
];
var flp;
// ----- run UI
function onInit() {
dsp.clear(); LED.set(); // display clear and turn back light on
setTimeout(function(){
// connect ui to dsp and display it
ui.connect(dsp)
.w(0,0,dspW-1,dspH-1) // wipe screen (rect) w/ default / bg color
.d(u,xDs) // display all elements
.di = true // set display changes to immediate
;
flp = function(){ dsp.flip(); };
flp();
new uiPBt(BTN1,0,function(t){ui.sp();flp();}); // sel prev on BTN1
new uiPBt(BTN4,0,function(t){ui.sn();flp();}); // sel next on BTN4
new uiPBt(BTN3,0,function(t){ui.st(t+70,t);setTimeout(flp,t+140);}); // tap on BTN3
},1000);
}
setTimeout(onInit,999); // for dev only, remove before upload for save()
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