libslider: new library with conf. slider

apps/libslider/ChangeLog

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+0.01: New App!

apps/libslider/README.md

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+# App Name
+
+More information on making apps:
+
+* http://www.espruino.com/Bangle.js+First+App
+* http://www.espruino.com/Bangle.js+App+Loader
+
+Describe the app...
+
+Add screen shots (if possible) to the app folder and link then into this file with ![](<name>.png)
+
+## Usage
+
+Describe how to use it
+
+## Features
+
+Name the function
+
+## Controls
+
+Name the buttons and what they are used for
+
+## Requests
+
+Name who should be contacted for support/update requests
+
+## Creator
+
+Your name

apps/libslider/app-icon.js

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+require("heatshrink").decompress(atob("mEwwJC/AH4A/AH4AgA=="))

apps/libslider/lib.js

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+// Constants for the indicator:
+const X_START = 87;
+const WIDTH = 50;
+const Y_START = 5;
+const HEIGHT = 165;
+const STEPS = 10;
+const STEP_SIZE = HEIGHT/STEPS;
+const OVERSIZE = 0.5;
+
+// Initialize the level
+let level = 0; // TODO: Depend on parameter.
+let lastLevel;
+let levelHeight;
+let smoothpastedge = true;
+
+let continDrag = (e)=>{
+  // If draging on the indicator, adjust one-to-one.
+    if (e.x>X_START-OVERSIZE*WIDTH && e.x<X_START+OVERSIZE*WIDTH) {
+      draw('map', e.y);
+    } else if (true) {
+
+      dy += e.dy;
+      //if (!e.b) dy=0;
+      while (Math.abs(dy)>32) {
+        if (dy>0) { dy-=32; draw('incr',1) }
+        else { dy+=32; draw('incr',-1) }
+        Bangle.buzz(20);
+      }
+    }
+ E.stopEventPropagation&&E.stopEventPropagation();
+};
+
+let ovr = Graphics.createArrayBuffer(WIDTH,HEIGHT,1,{msb:true});
+
+let draw = (mode, input)=>{
+  input = Math.min(input,170);
+  // Draw the indicator.
+    // Should be displayed when a relevant drag event is detected.
+    // Should time out.
+    // If user drags directly on the draw area, adjust level one-to-one.
+    // 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;
+  }
+
+  levelHeight = level==0?WIDTH:level*STEP_SIZE; 
+  //levelHeight = Math.max(level*STEP_SIZE,STEP_SIZE);
+  lastLevel = level;
+
+  ovr.clear().setColor(1).
+    fillRect({x:0,y:0,w:WIDTH,y2:ovr.getHeight(),r:30}). // To get outer border...
+    setColor(0).
+    fillRect({x:2,y:2,w:WIDTH-5,y2:ovr.getHeight()-2,r:30}). // ... and here it's made hollow.
+    setColor(0==level?0:1).
+    fillRect({x:4,y:ovr.getHeight()-levelHeight+4,w:WIDTH-9,y2:ovr.getHeight()-4,r:30}); // Here the bar is drawn.
+    Bangle.setLCDOverlay({
+      width:ovr.getWidth(), height:ovr.getHeight(),
+      bpp:1, transparent:0,
+      buffer:ovr.buffer
+    },X_START,Y_START);
+
+  print(level, input);
+  //print(process.memory().usage);
+};
+
+let dy = 0;
+Bangle.prependListener('drag', continDrag);
+g.setColor(1,0,0).fillRect(Bangle.appRect).reset();

apps/libslider/metadata.json

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+{ "id": "libslider",
+  "name": "My app's human readable name",
+  "shortName":"Short Name",
+  "version":"0.01",
+  "description": "A detailed description of my great app",
+  "icon": "app.png",
+  "tags": "",
+  "supports" : ["BANGLEJS2"],  
+  "readme": "README.md",
+  "storage": [
+    {"name":"7chname.img","url":"app-icon.js","evaluate":true}
+  ]
+}