From ce4b8dabac5be4e28ba1316fb97783ffeee3c633 Mon Sep 17 00:00:00 2001
From: Blue Fox <bluefox@privacynerd.de>
Date: Tue, 7 Mar 2023 17:13:36 +0100
Subject: [PATCH] Added a new Module: a spirit level

---
 speed.trailsense.js       |  1 +
 spiritlevel.trailsense.js | 59 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 spiritlevel.trailsense.js

diff --git a/speed.trailsense.js b/speed.trailsense.js
index 042b6bd..a32af96 100644
--- a/speed.trailsense.js
+++ b/speed.trailsense.js
@@ -21,6 +21,7 @@ function drawFace() {
 
   // Some initialization
   Bangle.setGPSPower(true);
+  g.setFontAlign(0,0);
   g.setColor(g.theme.bg);
   g.fillRect(0,0,g.getWidth(), g.getHeight());
   g.setColor(g.theme.fg2);
diff --git a/spiritlevel.trailsense.js b/spiritlevel.trailsense.js
new file mode 100644
index 0000000..a5bfa85
--- /dev/null
+++ b/spiritlevel.trailsense.js
@@ -0,0 +1,59 @@
+(() => {
+  old = { 'x':0, 'y':0 };
+
+
+  function drawSpiritLevel(v,W,H,offsetX,offsetY) {  
+    /* ---------------------------------
+    v is the current velocity given when the
+    event 'accel' fires - W,H and the offsets
+    are width, height, and offsets of the 
+    displayed spirit level
+    --------------------------------- */
+    
+    // calculate sizes of forms
+    var outlineRectULCx = offsetX+W/2-(W-40)/2;  // upper left corner (ULC) of the outline rect
+    var outlineRectULCy = offsetY+H/2-(H-40)/2;  // upper left corner of the outline rect
+    var outlineRectLRCx = offsetX+W/2+(W-40)/2;  // lower right corner (LRC) of the outline rect
+    var outlineRectLRCy = offsetY+H/2+(H-40)/2;  // lower right corner of the outline rect
+
+    // draw outlines (cross and circle
+    g.setColor(g.theme.fg2);
+    g.drawRect(outlineRectULCx,outlineRectULCy,  outlineRectLRCx,outlineRectLRCy);
+    g.fillRect(offsetX+W/2-20,offsetY+H/2-3, offsetX+W/2+20,offsetY+H/2+3); // horizontal line of the cross
+    g.fillRect(offsetX+W/2-3,offsetY+H/2-20, offsetX+W/2+3,offsetY+H/2+20); // vertical line of the cross
+
+    var n = { x:E.clip(W/2+v.x*256,29,W-29),
+              y:E.clip(H/2+v.y*256,29,H-29), };
+    var dX = v.x*90;
+    var dY = v.y*90;
+
+    g.reset();
+    g.clearRect(offsetX,offsetY,offsetX+W,offsetY+16); // clear behind text
+    g.clearRect(offsetX+W-16,offsetY,offsetX+W,offsetY+H); // clear behind text
+    g.setFont("Vector",15).setFontAlign(0,-1).drawString("Y: " + dY.toFixed(1), offsetX+W/2,offsetY+2);
+    g.setFont("Vector",15).setFontAlign(0,-1,1).drawString("X: " + dX.toFixed(1), offsetX+W-2,offsetY+H/2);
+    g.setColor(g.theme.bg).fillCircle(offsetX+old.x,offsetY+old.y, 8); // clear old marker
+    g.setColor(g.theme.fg).fillCircle(offsetX+n.x,offsetY+n.y, 8); // draw new marker
+
+    // vibrate if it's nearly flat
+    if(Math.abs(v.x)<0.015 && Math.abs(v.y)<0.015) {
+      Bangle.beep(20,440);
+    }
+
+    old = n;
+  }
+
+  function drawFace() {
+    Bangle.setLCDTimeout(60);
+    g.clear();
+    Bangle.on('accel', (v) => { drawSpiritLevel(v,240,240,0,0); });
+  }
+
+  function stop() {
+    Bangle.removeAllListeners();
+    Bangle.setLCDTimeout(10);
+    g.clear();
+  }
+
+  return { drawFace:drawFace,stop:stop };
+})();