swscroll: fix check boxes not behaving

... by more properly rebasing on latest E_showScroller_Q3.js from
Espruino.

apps/swscroll/ChangeLog

@@ -2,4 +2,4 @@
 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.
-
+0.05: Fix for the rebase in ver 0.04. Check boxes didn't behave but now they do.

apps/swscroll/boot.js

@@ -1,4 +1,4 @@
-E.showScroller = (function(options) {    
+E.showScroller = (function(options) {
   /* options = {
     h = height
     c = # of items
@@ -19,20 +19,20 @@ E.showScroller = (function(options) {
   */
 if (!options) return Bangle.setUI(); // remove existing handlers
 
-var touchHandler = (_,e)=>{
+var draw = () => {
-  if (e.y<R.y-4) return;
+  g.reset().clearRect(R).setClipRect(R.x,R.y,R.x2,R.y2);
-  var i = YtoIdx(e.y);
+  var a = YtoIdx(R.y);
-  if ((menuScrollMin<0 || i>=0) && i<options.c){
+  var b = Math.min(YtoIdx(R.y2),options.c-1);
-    let yAbs = (e.y + rScroll - R.y);
+  for (var i=a;i<=b;i++)
-    let yInElement = yAbs - i*options.h;
+    options.draw(i, {x:R.x,y:idxToY(i),w:R.w,h:options.h});
-    options.select(i, {x:e.x, y:yInElement});
+  g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1);
-  }
 };
 
 Bangle.setUI({
   mode : "custom",
   back : options.back,
   remove : options.remove,
+  redraw : draw,
   swipe : (_,UD)=>{
     pixels = 120;
     var dy = UD*pixels;
@@ -45,13 +45,13 @@ Bangle.setUI({
     rScroll = s.scroll &~1;
     dy = oldScroll-rScroll;
     if (!dy || options.c<=3) return; //options.c<=3 should maybe be dynamic, so 3 would be replaced by a variable dependent on R=Bangle.appRect. It's here so we don't try to scroll if all entries fit in the app rectangle.
-    g.reset().setClipRect(R.x,R.y,R.x2,R.y2);
+    g.reset().setClipRect(R.x,R.y,R.x2,R.y2).scroll(0,dy);
-    g.scroll(0,dy);
     var d = UD*pixels;
     if (d < 0) {
-      g.setClipRect(R.x,R.y2-(1-d),R.x2,R.y2);
+      let y = Math.max(R.y2-(1-d), R.y);
-      let i = YtoIdx(R.y2-(1-d));
+      g.setClipRect(R.x,y,R.x2,R.y2);
-      let y = idxToY(i);
+      let i = YtoIdx(y);
+      y = idxToY(i);
       //print(i, options.c, options.c-i); //debugging info
       while (y < R.y2 - (options.h*((options.c-i)<=0)) ) { //- (options.h*((options.c-i)<=0)) makes sure we don't go beyond the menu entries in the menu object "options". This has to do with "dy = s.scroll - menuScrollMax-8" above.
         options.draw(i, {x:R.x,y:y,w:R.w,h:options.h});
@@ -59,10 +59,10 @@ Bangle.setUI({
         y += options.h;
       }
     } else { // d>0
-      g.setClipRect(R.x,R.y,R.x2,R.y+d);
+      let y = Math.min(R.y+d, R.y2);
-      let i = YtoIdx(R.y+d);
+      g.setClipRect(R.x,R.y,R.x2,y);
-      let y = idxToY(i);
+      let i = YtoIdx(y);
-      //print(i, options.c, options.c-i); //debugging info
+      y = idxToY(i);
       while (y > R.y-options.h) {
         options.draw(i, {x:R.x,y:y,w:R.w,h:options.h});
         y -= options.h;
@@ -70,7 +70,15 @@ Bangle.setUI({
       }
     }
     g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1);
-  }, touch : touchHandler
+  }, 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});
+    }
+  }
 });
 
 var menuShowing = false;
@@ -87,24 +95,16 @@ function idxToY(i) {
 function YtoIdx(y) {
   return Math.floor((y + rScroll - R.y)/options.h);
 }
- 
+
 var s = {
   scroll : E.clip(0|options.scroll,menuScrollMin,menuScrollMax),
-  draw : () => {
+  draw : draw, drawItem : i => {
-  g.reset().clearRect(R.x,R.y,R.x2,R.y2);
+    var y = idxToY(i);
-  g.setClipRect(R.x,R.y,R.x2,R.y2);
+    g.reset().setClipRect(R.x,Math.max(y,R.y),R.x2,Math.min(y+options.h,R.y2));
-  var a = YtoIdx(R.y);
+    options.draw(i, {x:R.x,y:y,w:R.w,h:options.h});
-  var b = Math.min(YtoIdx(R.y2),options.c-1);
+    g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1);
-  for (var i=a;i<=b;i++)
+  }, isActive : () => Bangle.uiRedraw == draw
-    options.draw(i, {x:R.x,y:idxToY(i),w:R.w,h:options.h});
+};
-  g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1);
-}, drawItem : i => {
-  var y = idxToY(i);
-  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": "0.04",
+  "version": "0.05",
   "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",