swscroll: pull in changes from showScroller_Q3

apps/swscroll/ChangeLog

@@ -1,4 +1,5 @@
 0.01: Inital release.
 0.02: Rebasing on latest changes to showScroller_Q3 (https://github.com/espruino/Espruino/commit/2d3c34ef7c2b9fe2118e816aacd2e096adb99596).
 0.03: Rebasing on latest changes to showScroller_Q3 (https://github.com/espruino/Espruino/commit/b6f8105b6348bb6f7cd03ac11efc1f3585c6ad79). Ensure that changing a menu item when half-scrolled off screen doesn't overwrite widgets.
+0.04: Rebasing on latest changes to showScroller_Q3 (https://github.com/espruino/Espruino/commit/a0e2d9231df709849f81abf572a742b0fceab85b). Fixes missing `isActive` function that caused an error.
 

apps/swscroll/boot.js

@@ -10,12 +10,25 @@ E.showScroller = (function(options) {
   }
 
   returns {
-    draw  = draw all
-    drawItem(idx) = draw specific item
+    scroll: int                // current scroll amount
+    draw: function()           // draw all
+    drawItem : function(idx)   // draw specific item
+    isActive : function()      // is this scroller still active?
   }
+
   */
 if (!options) return Bangle.setUI(); // remove existing handlers
 
+var touchHandler = (_,e)=>{
+  if (e.y<R.y-4) return;
+  var i = YtoIdx(e.y);
+  if ((menuScrollMin<0 || i>=0) && i<options.c){
+    let yAbs = (e.y + rScroll - R.y);
+    let yInElement = yAbs - i*options.h;
+    options.select(i, {x:e.x, y:yInElement});
+  }
+};
+
 Bangle.setUI({
   mode : "custom",
   back : options.back,
@@ -57,17 +70,9 @@ Bangle.setUI({
       }
     }
     g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1);
-  }, touch : (_,e)=>{
-    if (e.y<R.y-4) return;
-    var i = YtoIdx(e.y);
-    if ((menuScrollMin<0 || i>=0) && i<options.c){
-      let yAbs = (e.y + rScroll - R.y);
-      let yInElement = yAbs - i*options.h;
-      options.select(i, {x:e.x, y:yInElement});
-    }
-  }
-});  
-  
+  }, touch : touchHandler
+});
+
 var menuShowing = false;
 var R = Bangle.appRect;
 var Y = R.y;
@@ -82,8 +87,8 @@ function idxToY(i) {
 function YtoIdx(y) {
   return Math.floor((y + rScroll - R.y)/options.h);
 }
-  
-var s = {  
+ 
+var s = {
   scroll : E.clip(0|options.scroll,menuScrollMin,menuScrollMax),
   draw : () => {
   g.reset().clearRect(R.x,R.y,R.x2,R.y2);
@@ -98,7 +103,8 @@ var s = {
   g.reset().setClipRect(R.x,Math.max(y,R.y),R.x2,Math.min(y+options.h,R.y2));
   options.draw(i, {x:R.x,y:y,w:R.w,h:options.h});
   g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1);
-}};
+    }, isActive : () => Bangle.touchHandler == touchHandler
+  };
 var rScroll = s.scroll&~1; // rendered menu scroll (we only shift by 2 because of dither)
 s.draw(); // draw the full scroller
 g.flip(); // force an update now to make this snappier

apps/swscroll/metadata.json

@@ -1,7 +1,7 @@
 {
   "id": "swscroll",
   "name": "Swipe menus",
-  "version": "0.03",
+  "version": "0.04",
   "description": "Replace built in E.showScroller to act on swipe instead of drag. Navigate menus in discrete steps instead of a continuous motion.",
   "readme": "README.md",
   "icon": "app.png",