bump version to 1.4

LICENSE.md

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+                  GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

flake.lock

@@ -113,6 +113,20 @@
       }
     },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1765270179,
+        "narHash": "sha256-g2a4MhRKu4ymR4xwo+I+auTknXt/+j37Lnf0Mvfl1rE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "677fbe97984e7af3175b6c121f3c39ee5c8d62c9",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1734649271,
         "narHash": "sha256-4EVBRhOjMDuGtMaofAIqzJbg4Ql7Ai0PSeuVZTHjyKQ=",
@@ -133,24 +147,26 @@
         "commit-hooks": "commit-hooks",
         "flake-compat": "flake-compat_2",
         "flake-utils": "flake-utils_2",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "dirtyRev": "3fe382c507afd73a2c6a51ece280c3fb567ac53a-dirty",
-        "dirtyShortRev": "3fe382c-dirty",
         "lastModified": 1764961369,
-        "narHash": "sha256-TE0XcWkJNwMVKonZ8y/c4kVLEp71A+45T5Fys2Jv2uI=",
+        "narHash": "sha256-FPMMcBAoeQgA/W92XTOAmTdDMmhbpNgsuSia7BMOBUs=",
-        "type": "git",
+        "owner": "diomidova",
-        "url": "file:///home/diomidova/Pebble/pebble.nix"
+        "repo": "pebble.nix",
+        "rev": "3fe382c507afd73a2c6a51ece280c3fb567ac53a",
+        "type": "github"
       },
       "original": {
-        "type": "git",
+        "owner": "diomidova",
-        "url": "file:///home/diomidova/Pebble/pebble.nix"
+        "repo": "pebble.nix",
+        "type": "github"
       }
     },
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
         "pebble": "pebble"
       }
     },

flake.nix

@@ -3,15 +3,24 @@
 
   inputs = {
     # pebble.url = "github:pebble-dev/pebble.nix";
-    pebble.url = "github:diomidov/pebble.nix";
+    pebble.url = "github:diomidova/pebble.nix";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
   outputs =
-    { pebble, flake-utils, ... }:
+    { pebble, flake-utils, nixpkgs, ... }:
-    flake-utils.lib.eachDefaultSystem (system: {
+    flake-utils.lib.eachDefaultSystem (system:
+    let pkgs = import nixpkgs {
+      overlays = [ ];
+      inherit system;
+    };
+    in
+    {
       devShell = pebble.pebbleEnv.${system} {
         withCoreDevices = true;
+        packages = [
+          pkgs.python312Packages.ipython
+        ];
       };
     });
 }

package-lock.json

@@ -1,21 +1,29 @@
 {
   "name": "cryptic-clock",
-  "version": "1.1",
+  "version": "1.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cryptic-clock",
-      "version": "1.1",
+      "version": "1.4",
+      "license": "GPL-3.0-or-later",
       "dependencies": {
-        "@smallstoneapps/utils": "^1.3.0",
+        "@rebble/sdk-c-utils": "^1.2.3",
+        "pebble-clay": "^1.0.4",
         "pebble-cpp": "^0.3.1"
       }
     },
-    "node_modules/@smallstoneapps/utils": {
+    "node_modules/@rebble/sdk-c-utils": {
-      "version": "1.3.0",
+      "version": "1.2.3",
-      "resolved": "https://registry.npmjs.org/@smallstoneapps/utils/-/utils-1.3.0.tgz",
+      "resolved": "https://registry.npmjs.org/@rebble/sdk-c-utils/-/sdk-c-utils-1.2.3.tgz",
-      "integrity": "sha512-2XSH7umjEtXqdBTil8yhdLRjw259ZgUhn/c6f/4vW5RlM/jo4J+Hoygc+tr4z8Wv5ymnFvxfNq2MpqTqNM+TTg==",
+      "integrity": "sha512-24b/qtVpviGJyVhvQYTsFojRn30YcVSepeCVbi7AqrNPfitGNC2EqwLLpKZuH1QTnE6UcTgjLrh6yda7p6UvAg==",
+      "license": "MIT"
+    },
+    "node_modules/pebble-clay": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/pebble-clay/-/pebble-clay-1.0.4.tgz",
+      "integrity": "sha512-/rXxmltdW8JyohDzXINdea+d2wnFJVNFiTXfuZsKpySURZSCFMMucX9sZPZvbHnEA4xFINM4iicyhBbvY4ALfw==",
       "license": "MIT"
     },
     "node_modules/pebble-cpp": {

package.json

@@ -1,13 +1,15 @@
 {
   "name": "cryptic-clock",
   "author": "jennyaa",
-  "version": "1.1",
+  "version": "1.4",
+  "license": "GPL-3.0-or-later",
   "keywords": [
     "pebble-app"
   ],
   "private": true,
   "dependencies": {
-    "@smallstoneapps/utils": "^1.3.0",
+    "@rebble/sdk-c-utils": "^1.2.3",
+    "pebble-clay": "^1.0.4",
     "pebble-cpp": "^0.3.1"
   },
   "pebble": {
@@ -23,25 +25,34 @@
     "watchapp": {
       "watchface": true
     },
-    "messageKeys": [
+    "messageKeys": {
-      "dummy"
+      "BACKGROUND_COLOR": 10000,
-    ],
+      "DIGIT_COLOR": 10001,
+      "FRAME_COLOR": 10002,
+      "TIME_FORMAT_OVERRIDE": 10010,
+      "12H_START": 10011,
+      "24H_START": 10012
+    },
+    "capabilities": [ "configurable" ],
     "resources": {
       "media": [
         {
           "type": "bitmap",
           "name": "DIGITS",
-          "file": "digits.png"
+          "file": "digits.png",
+          "memoryFormat": "1BitPalette"
         },
         {
           "type": "bitmap",
           "name": "FRAME",
-          "file": "frame.png"
+          "file": "frame.png",
+          "memoryFormat": "1BitPalette"
         },
         {
           "type": "bitmap",
           "name": "MENU_ICON",
           "file": "icon.png",
+          "memoryFormat": "2BitPalette",
           "menuIcon": true
         }
       ]

src/c/bitmaps.cpp

@@ -0,0 +1,100 @@
+#include "bitmaps.hpp"
+#include <@rebble/sdk-c-utils/macros.h>
+
+using namespace Pebble;
+
+// TODO move this to pebble-cpp
+bool operator==(const GColor& lhs, const GColor& rhs) { return gcolor_equal(lhs, rhs); }
+bool operator!=(const GColor& lhs, const GColor& rhs) { return !gcolor_equal(lhs, rhs); }
+
+namespace bitmaps {
+  namespace {
+    GOwnedBitmap digitsBitmap;
+    GOwnedBitmap digitBitmaps[10];
+    GOwnedBitmap frameBitmap;
+
+    GColor* digitColor;
+    GColor* frameColor;
+
+
+    int GetPaletteSize(GBitmapBase& bitmap){
+      switch (bitmap.GetFormat()) {
+        case GBitmapFormat1BitPalette: return 2;
+        case GBitmapFormat2BitPalette: return 4;
+        case GBitmapFormat4BitPalette: return 16;
+        default: return 0;
+      }
+    }
+
+    GColor* FindColor(GBitmapBase& bitmap, GColor color) {
+      GColor* palette = bitmap.GetPalette();
+      if (palette == nullptr) {
+        ERROR("Palette is null");
+        return nullptr;
+      }
+
+      int paletteSize = GetPaletteSize(bitmap);
+      if (paletteSize == 0) {
+        ERROR("Expected GBitmapFormat[124]BitPalette, got: %d", digitsBitmap.GetFormat());
+        return nullptr;
+      }
+      for (int i = 0; i < paletteSize; i++) {
+        if (palette[i] == color) {
+          DEBUG("Found color 0x%02X at index %d", color, i);
+          return &palette[i];
+        }
+      }
+      ERROR("Color 0x%02X not found in the palette", color);
+      return nullptr;
+    }
+  }
+
+  void Init() {
+    digitsBitmap = GOwnedBitmap::CreateWithResource(RESOURCE_ID_DIGITS);
+    auto size = digitsBitmap.GetBounds().size;
+    uint16_t w = size.w / 10;
+    uint16_t h = size.h;
+    for (int i = 0; i < 10; i++) {
+      digitBitmaps[i] = GOwnedBitmap::CreateSubBitmap(digitsBitmap, Pebble::GRect(i * w, 0, w, h));
+    }
+
+    frameBitmap = GOwnedBitmap::CreateWithResource(RESOURCE_ID_FRAME);
+
+    digitColor = FindColor(digitsBitmap, GColorBlack);
+    frameColor = FindColor(frameBitmap, GColorBlack);
+  }
+
+  void DeInit() {
+    for (int i = 0; i < 10; i++) {
+      digitBitmaps[i] = GOwnedBitmap();
+    }
+    digitsBitmap = GOwnedBitmap();
+    frameBitmap = GOwnedBitmap();
+    digitColor = nullptr;
+    frameColor = nullptr;
+  }
+
+  GBitmapBase& GetDigitBitmap(uint16_t digit) {return digitBitmaps[digit];}
+  GBitmapBase& GetFrameBitmap() {return frameBitmap;}
+
+
+  void SetDigitColor(GColor color) {
+    if (digitColor != nullptr) *digitColor = color;
+  }
+  void SetFrameColor(GColor color) {
+    if (frameColor != nullptr) *frameColor = color;
+  }
+
+  void PrintPalette(GBitmapBase& bitmap) {
+    int paletteSize = GetPaletteSize(bitmap);
+    if (paletteSize == 0) {
+      ERROR("Expected GBitmapFormat[124]BitPalette, got: %d", digitsBitmap.GetFormat());
+      return;
+    }
+    DEBUG("%d colors:", paletteSize);
+    GColor* palette = bitmap.GetPalette();
+    for (int i = 0; i < paletteSize; i++) {
+      DEBUG("* 0x%02X = argb(%d,%d,%d,%d)", palette[i].argb, palette[i].a, palette[i].r, palette[i].g, palette[i].b);
+    }
+  }
+}

src/c/bitmaps.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <pebble-cpp/pebble.hpp>
+
+namespace bitmaps {
+  void Init();
+  void DeInit();
+  Pebble::GBitmapBase& GetDigitBitmap(uint16_t digit);
+  Pebble::GBitmapBase& GetFrameBitmap();
+  void SetDigitColor(GColor color);
+  void SetFrameColor(GColor color);
+  void PrintPalette(Pebble::GBitmapBase& bitmap);
+}

src/c/cryptic_clock.cpp

@@ -1,72 +0,0 @@
-#include <pebble-cpp/pebble.hpp>
-#include "pebble_bitmap_layer.hpp"
-#include <@smallstoneapps/utils/macros.h>
-#include "digit_layer.hpp"
-
-using namespace Pebble;
-
-#undef DEBUG
-
-class MainWindow : public AppWindow, public TickTimer {
-  DigitLayer digitLayers[4];
-  GOwnedBitmap frameBitmap;
-  Pebble::BitmapLayer frameLayer;
-protected:
-  void OnLoad() {
-    auto bounds = this->GetBounds();
-    int16_t w2 = bounds.size.w / 2;
-    int16_t h = bounds.size.h;
-
-    digitLayers[0].SetFrame(Pebble::GRect(w2-68, 0, 32, h));
-    digitLayers[1].SetFrame(Pebble::GRect(w2-36, 0, 32, h));
-    digitLayers[2].SetFrame(Pebble::GRect(w2+4, 0, 32, h));
-    digitLayers[3].SetFrame(Pebble::GRect(w2+36, 0, 32, h));
-    digitLayers[0].SetDigitCount(clock_is_24h_style() ? 3 : 2);
-    digitLayers[1].SetDigitCount(clock_is_24h_style() ? 24 : 12);
-    digitLayers[2].SetDigitCount(6);
-    digitLayers[3].SetDigitCount(10);
-    for (size_t i = 0; i < 4; i++) {
-      this->digitLayers[i].UpdateLayout();
-      this->AddChild(this->digitLayers[i]);
-    }
-
-    this->frameBitmap = Pebble::GOwnedBitmap::CreateWithResource(RESOURCE_ID_FRAME);
-    this->frameLayer.SetBitmap(this->frameBitmap);
-    this->frameLayer.SetFrame(bounds);
-    this->frameLayer.SetCompositingMode(GCompOpSet);
-    this->AddChild(this->frameLayer);
-
-#ifdef DEBUG
-    TickTimerStart(SECOND_UNIT);
-#else
-    TickTimerStart(MINUTE_UNIT);
-#endif
-    UpdateTime(false);
-  }
-
-  void UpdateTime(bool animate=true) {
-    DateTime date = DateTime::Now();
-    int hour = date.GetHour();
-#ifdef DEBUG
-    int minute = date.GetSecond();
-#else
-    int minute = date.GetMinute();
-#endif
-    if (!clock_is_24h_style()) hour %= 12;
-    this->digitLayers[0].RotateTo(hour / 10, animate);
-    this->digitLayers[1].RotateTo(hour, animate);
-    this->digitLayers[2].RotateTo(minute / 10, animate);
-    this->digitLayers[3].RotateTo(minute, animate);
-  }
-
-  void OnTick(tm &tick_time, TimeUnits units_changed) {
-    UpdateTime(true);
-  }
-};
-
-MAIN {
-  MainWindow window;
-  window.StackPush(true);
-  app_event_loop();
-  return 0;
-}

src/c/digit_layer.cpp

@@ -1,41 +1,31 @@
 #include "digit_layer.hpp"
-#include <@smallstoneapps/utils/macros.h>
+#include <@rebble/sdk-c-utils/macros.h>
+#include "bitmaps.hpp"
 
 using namespace Pebble;
 
 namespace {
-  // NOTE: technically a memory leak, destructor will never be called.
+  static constexpr int16_t extraDigits = 6;
-  // Can't make it a static variable in draw_digit, because `atexit` is broken on Pebble.
+  static constexpr int16_t digitHeight = 56;
-  static GOwnedBitmap digitBitmaps[10];
+  static constexpr int16_t digitCount = 10;
-  static bool bitmapsInitialized = false;
 
-  static void draw_digit(const Pebble::GContext& ctx, const Pebble::GRect& bounds, const uint16_t digit) {
+  void draw_digit(const Pebble::GContext& ctx, const Pebble::GRect& bounds, const uint16_t digit) {
-    if (!bitmapsInitialized) {
+    Pebble::GBitmapBase& bitmap = bitmaps::GetDigitBitmap(digit);
-      auto bitmap = GOwnedBitmap::CreateWithResource(RESOURCE_ID_DIGITS);
+    auto rect = bitmap.GetBounds();
-      auto size = bitmap.GetBounds().size;
-      uint16_t w = size.w / 10;
-      uint16_t h = size.h;
-      for (int i = 0; i < 10; i++) {
-        digitBitmaps[i] = GOwnedBitmap::CreateSubBitmap(bitmap, Pebble::GRect(i * w, 0, w, h));
-      }
-      bitmapsInitialized = true;
-    }
-
-    auto bitmap = &digitBitmaps[digit];
-    auto rect = bitmap->GetBounds();
     rect.Align(bounds, GAlignCenter, false);
-    ctx.DrawBitmapInRect(*bitmap, rect);
+    ctx.DrawBitmapInRect(bitmap, rect);
   }
 }
 
 void DigitLayerInner::OnUpdate(const Pebble::GContext& ctx) {
   auto bounds = this->GetBounds();
+  // LOG("Digit layer update. %d digits", digitCount);
 
-  ctx.SetFillColor(GColorBlack);
   ctx.SetCompositingMode(GCompOpSet);
-  for (int i = 0; i <= this->digitCount + 2 * this->extraDigits; i++) {
+  for (int i = 0; i <= digitCount + 2 * extraDigits; i++) {
-    Pebble::GRect rect(0, i * this->digitHeight, bounds.size.w, this->digitHeight);
+    Pebble::GRect rect(0, i * digitHeight, bounds.size.w, digitHeight);
-    uint16_t digit = ((i - this->extraDigits) % this->digitCount + this->digitCount) % this->digitCount % 10;
+    uint16_t digit = ((i - extraDigits) % digitCount + digitCount) % digitCount;
+    // LOG("Digit %d -> %d", i - extraDigits, digit);
     draw_digit(ctx, rect, digit);
   }
 }
@@ -49,7 +39,7 @@ DigitLayer::DigitLayer() : Pebble::SimpleLayer(Pebble::GRect()) {
 void DigitLayer::UpdateLayout() {
   auto bounds = this->GetBounds();
   this->scrollLayer.SetFrame(bounds);
-  bounds.size.h = (this->innerLayer.digitCount + 2 * this->innerLayer.extraDigits) * this->innerLayer.digitHeight;
+  bounds.size.h = (digitCount + 2 * extraDigits) * digitHeight;
   this->innerLayer.SetFrame(bounds);
   this->scrollLayer.SetContentSize(bounds.size);
 }
@@ -57,17 +47,21 @@ void DigitLayer::UpdateLayout() {
 
 int16_t DigitLayer::ComputeOffset(uint16_t digit) {
   auto bounds = this->GetBounds();
-  return bounds.size.h / 2 - this->innerLayer.digitHeight / 2
+  return bounds.size.h / 2 - digitHeight / 2 - (digit + extraDigits) * digitHeight;
-      - (digit + this->innerLayer.extraDigits) * this->innerLayer.digitHeight;
 }
 
 void DigitLayer::RotateTo(uint16_t digit, bool animate) {
-  digit %= innerLayer.digitCount;
+  // LOG("Digit %d, out of %d", digit, digitCount);
+  digit %= digitCount;
   auto currentOffset = this->scrollLayer.GetContentOffset();
-  if (digit == 0 && currentOffset.y <= ComputeOffset(this->innerLayer.digitCount / 2)) {
+  if (digit > this->currentDigit + digitCount / 2) {
-    currentOffset.y += this->innerLayer.digitCount * this->innerLayer.digitHeight;
+    currentOffset.y -= digitCount * digitHeight;
+    this->scrollLayer.SetContentOffset(currentOffset, false);
+  } else if (digit < this->currentDigit - digitCount / 2) {
+    currentOffset.y += digitCount * digitHeight;
     this->scrollLayer.SetContentOffset(currentOffset, false);
   }
 
   this->scrollLayer.SetContentOffset(this->ComputeOffset(digit), animate);
+  this->currentDigit = digit;
 }

src/c/digit_layer.hpp

@@ -1,20 +1,10 @@
 #pragma once
 
 #include <pebble-cpp/pebble.hpp>
-#include <@smallstoneapps/utils/macros.h>
 
 class DigitLayerInner : public Pebble::CustomLayer {
-  static constexpr int16_t extraDigits = 2;
-  static constexpr int16_t digitHeight = 56;
-  int16_t digitCount = 10;
-
   DigitLayerInner() : Pebble::CustomLayer(Pebble::GRect()) {}
 
-  void SetDigitCount(uint16_t cnt = 10) {
-    this->digitCount = cnt;
-    this->MarkDirty();
-  }
-
   static void DrawDigit(const Pebble::GContext& ctx, const Pebble::GRect& bounds, const uint16_t digit);
 
   friend class DigitLayer;
@@ -26,13 +16,10 @@ protected:
 class DigitLayer : public Pebble::SimpleLayer {
   DigitLayerInner innerLayer;
   Pebble::ScrollLayer scrollLayer;
+  int16_t currentDigit = 0;
 public:
   DigitLayer();
 
-  void SetDigitCount(uint16_t cnt = 10) {
-    this->innerLayer.SetDigitCount(cnt);
-    this->MarkDirty();
-  }
   void UpdateLayout();
   void RotateTo(uint16_t digit, bool animate=true);
 private:

src/c/main.cpp

@@ -0,0 +1,95 @@
+#include <pebble-cpp/pebble.hpp>
+#include <@rebble/sdk-c-utils/macros.h>
+#include "pebble_bitmap_layer.hpp"
+#include "digit_layer.hpp"
+#include "bitmaps.hpp"
+#include "settings.hpp"
+
+using namespace Pebble;
+
+// For debugging
+constexpr bool USE_SECONDS_INSTEAD_OF_MINUTES = false;
+
+class MainWindow : public AppWindow, public TickTimer {
+  DigitLayer digitLayers[4];
+  Pebble::BitmapLayer frameLayer;
+protected:
+  void OnLoad() {
+    auto bounds = this->GetBounds();
+    int16_t w2 = bounds.size.w / 2;
+    int16_t h = bounds.size.h;
+
+    digitLayers[0].SetFrame(Pebble::GRect(w2-68, 0, 32, h));
+    digitLayers[1].SetFrame(Pebble::GRect(w2-36, 0, 32, h));
+    digitLayers[2].SetFrame(Pebble::GRect(w2+4, 0, 32, h));
+    digitLayers[3].SetFrame(Pebble::GRect(w2+36, 0, 32, h));
+    for (size_t i = 0; i < 4; i++) {
+      this->digitLayers[i].UpdateLayout();
+      this->AddChild(this->digitLayers[i]);
+    }
+
+    this->frameLayer.SetBitmap(bitmaps::GetFrameBitmap());
+    this->frameLayer.SetFrame(bounds);
+    this->frameLayer.SetCompositingMode(GCompOpSet);
+    this->AddChild(this->frameLayer);
+
+    // MINUTE_UNIT doesn't seem to be called if only the hours change
+    // This can happen when time zone changes or in tests
+    // So we also update time on HOUR_UNIT
+    TickTimerStart(HOUR_UNIT);
+    TickTimerStart(USE_SECONDS_INSTEAD_OF_MINUTES ? SECOND_UNIT : MINUTE_UNIT);
+    UpdateTime(false);
+    ApplySettings();
+  }
+
+  void UpdateTime(bool animate=true) {
+    DateTime dateTime = DateTime::Now();
+    int hour = settings::FormatHour(dateTime.GetHour());
+    int minute = USE_SECONDS_INSTEAD_OF_MINUTES ? dateTime.GetSecond() : dateTime.GetMinute();
+
+    // digitLayers[0].SetDigitCount(is_24h ? 3 : 2);
+    // digitLayers[1].SetDigitCount(is_24h ? 24 : 12);
+    // digitLayers[2].SetDigitCount(6);
+    // digitLayers[3].SetDigitCount(10);
+    this->digitLayers[0].RotateTo(hour / 10, animate);
+    this->digitLayers[1].RotateTo(hour, animate);
+    this->digitLayers[2].RotateTo(minute / 10, animate);
+    this->digitLayers[3].RotateTo(minute, animate);
+  }
+
+  void OnTick(tm &tick_time, TimeUnits units_changed) {
+    UpdateTime(true);
+  }
+  
+public:
+  void ApplySettings() {
+    this->SetBackgroundColor(settings::GetBackgroundColor());
+    bitmaps::SetDigitColor(settings::GetDigitColor());
+    bitmaps::SetFrameColor(settings::GetFrameColor());
+    this->UpdateTime(false);
+    this->MarkDirty();
+  }
+};
+
+namespace {
+  void HandleMsg(DictionaryIterator* iter, void* context) {
+    settings::HandleMsg(iter);
+    static_cast<MainWindow*>(context)->ApplySettings();
+  }
+}
+
+MAIN {
+  bitmaps::Init();
+  settings::Load();
+  MainWindow window;
+  window.StackPush(true);
+
+  app_message_set_context(&window);
+  app_message_register_inbox_received(HandleMsg);
+  app_message_open(64, 64); // inbox, outbox
+
+  app_event_loop();
+
+  bitmaps::DeInit();
+  return 0;
+}

src/c/settings.cpp

@@ -0,0 +1,65 @@
+#include <@rebble/sdk-c-utils/macros.h>
+#include "settings.hpp"
+
+// Built-in GColorFromRGBA doesn't seem to work in C++11 :(
+#undef GColorFromRGBA
+GColor8 GColorFromRGBA(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha) {
+  GColor8 res;
+  res.a = alpha >> 6;
+  res.r = red >> 6;
+  res.g = green >> 6;
+  res.b = blue >> 6;
+  return res;
+}
+
+namespace settings {
+  namespace {
+    GColor backgroundColor = GColorWhite;
+    GColor digitColor = GColorBlack;
+    GColor frameColor = GColorBlack;
+    int time_format_override = 0;
+    int time_12h_start = 1;
+    int time_24h_start = 0;
+  }
+
+  void Save() {
+    persist_write_data(MESSAGE_KEY_BACKGROUND_COLOR, &backgroundColor, sizeof(GColor));
+    persist_write_data(MESSAGE_KEY_DIGIT_COLOR, &digitColor, sizeof(GColor));
+    persist_write_data(MESSAGE_KEY_FRAME_COLOR, &frameColor, sizeof(GColor));
+    persist_write_data(MESSAGE_KEY_TIME_FORMAT_OVERRIDE, &time_format_override, sizeof(int));
+    persist_write_data(MESSAGE_KEY_12H_START, &time_12h_start, sizeof(int));
+    persist_write_data(MESSAGE_KEY_24H_START, &time_24h_start, sizeof(int));
+  }
+
+  void Load() {
+    persist_read_data(MESSAGE_KEY_BACKGROUND_COLOR, &backgroundColor, sizeof(GColor));
+    persist_read_data(MESSAGE_KEY_DIGIT_COLOR, &digitColor, sizeof(GColor));
+    persist_read_data(MESSAGE_KEY_FRAME_COLOR, &frameColor, sizeof(GColor));
+    persist_read_data(MESSAGE_KEY_TIME_FORMAT_OVERRIDE, &time_format_override, sizeof(int));
+    persist_read_data(MESSAGE_KEY_12H_START, &time_12h_start, sizeof(int));
+    persist_read_data(MESSAGE_KEY_24H_START, &time_24h_start, sizeof(int));
+  }
+
+  void HandleMsg(DictionaryIterator* iter) {
+    if (auto tuple = dict_find(iter, MESSAGE_KEY_BACKGROUND_COLOR)) backgroundColor = GColorFromHEX(tuple->value->int32);
+    if (auto tuple = dict_find(iter, MESSAGE_KEY_DIGIT_COLOR)) digitColor = GColorFromHEX(tuple->value->int32);
+    if (auto tuple = dict_find(iter, MESSAGE_KEY_FRAME_COLOR)) frameColor = GColorFromHEX(tuple->value->int32);
+    if (auto tuple = dict_find(iter, MESSAGE_KEY_TIME_FORMAT_OVERRIDE)) time_format_override = tuple->value->int8;
+    if (auto tuple = dict_find(iter, MESSAGE_KEY_12H_START)) time_12h_start = tuple->value->int8;
+    if (auto tuple = dict_find(iter, MESSAGE_KEY_24H_START)) time_24h_start = tuple->value->int8;
+    Save();
+  }
+
+  GColor GetBackgroundColor() {return backgroundColor;}
+  GColor GetDigitColor() {return digitColor;}
+  GColor GetFrameColor() {return frameColor;}
+
+  int FormatHour(int hour) {
+    const bool is_24h = time_format_override ? time_format_override == 24 : clock_is_24h_style();
+    if (is_24h) {
+      return (hour + 24 - time_24h_start) % 24 + time_24h_start;
+    } else {
+      return (hour + 12 - time_12h_start) % 12 + time_12h_start;
+    }
+  }
+}

src/c/settings.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <pebble-cpp/pebble.hpp>
+
+namespace settings {
+  void Save();
+  void Load();
+  void HandleMsg(DictionaryIterator* iter);
+  GColor GetBackgroundColor();
+  GColor GetDigitColor();
+  GColor GetFrameColor();
+  int FormatHour(int hours);
+}

src/pkjs/config.js

@@ -0,0 +1,72 @@
+module.exports = [
+  { 
+    type: "section", 
+    items: [ 
+      {
+        type: "heading", 
+        defaultValue: "Colors",
+      },
+      {
+        label: "Background Color",
+        messageKey: "BACKGROUND_COLOR",
+        type: "color",
+        defaultValue: "#FFFFFF",
+        allowGray: true,
+      },
+      {
+        label: "Digit Color",
+        messageKey: "DIGIT_COLOR",
+        type: "color",
+        defaultValue: "#000000",
+        allowGray: true,
+      },
+      {
+        label: "Frame Color",
+        messageKey: "FRAME_COLOR",
+        type: "color",
+        defaultValue: "#00000",
+        allowGray: true,
+      },
+    ]
+  },
+  { 
+    type: "section", 
+    items: [ 
+      {
+        type: "heading", 
+        defaultValue: "Time Format",
+      },
+      {
+        label: "Time Format",
+        messageKey: "TIME_FORMAT_OVERRIDE",
+        type: "select",
+        options: [
+          {label: "Use system", value: 0},
+          {label: "12 hour", value: 12},
+          {label: "24 hour", value: 24},
+        ],
+        defaultValue: 0,
+      },
+      {
+        label: "12h Range",
+        description: "Most people want '1:00 to 12:59'. Some countries use '0:00 to 11:59' instead.",
+        messageKey: "12H_START",
+        type: "select",
+        options: Array.from({length: 12}, (_, i) => ({value: i, label: `${i}:00 to ${i + 11}:59`})),
+        defaultValue: 1,
+      },
+      {
+        label: "24h Range",
+        description: "Most people want '0:00 to 23:59'.",
+        messageKey: "24H_START",
+        type: "select",
+        options: Array.from({length: 24}, (_, i) => ({value: i, label: `${i}:00 to ${i + 23}:59`})),
+        defaultValue: 0,
+      },
+    ]
+  },
+  {
+    type: "submit",
+    defaultValue: "Save Settings",
+  },
+];

src/pkjs/index.js

@@ -0,0 +1,48 @@
+var Clay = require('pebble-clay');
+var clayConfig = require('./config');
+var clay = new Clay(clayConfig);
+
+
+// Patch `select` to return integers instead of strings
+
+function disable() {
+  if (this.$manipulatorTarget.get('disabled')) { return this; }
+  this.$element.set('+disabled');
+  this.$manipulatorTarget.set('disabled', true);
+  return this.trigger('disabled');
+}
+
+function enable() {
+  if (!this.$manipulatorTarget.get('disabled')) { return this; }
+  this.$element.set('-disabled');
+  this.$manipulatorTarget.set('disabled', false);
+  return this.trigger('enabled');
+}
+
+function hide() {
+  if (this.$element[0].classList.contains('hide')) { return this; }
+  this.$element.set('+hide');
+  return this.trigger('hide');
+}
+
+function show() {
+  if (!this.$element[0].classList.contains('hide')) { return this; }
+  this.$element.set('-hide');
+  return this.trigger('show');
+}
+
+clay.components.select.manipulator = {
+  get: function() {
+    return parseInt(this.$manipulatorTarget.get('value'));
+  },
+  set: function(value) {
+    if (this.get() === value) { return this; }
+    this.$manipulatorTarget.set('value', value);
+    return this.trigger('change');
+  },
+  disable: disable,
+  enable: enable,
+  hide: hide,
+  show: show
+};
+  

take_screenshots.py

@@ -0,0 +1,141 @@
+# A simple script to automatically take app screenshots
+# Hopefully some day it'll grow into an actual testing framework
+
+from uuid import UUID
+from datetime import datetime, timezone
+from time import sleep
+import os
+import png
+import json
+
+from pebble_tool.util.logs import PebbleLogPrinter
+from pebble_tool.sdk.emulator import ManagedEmulatorTransport
+from pebble_tool.commands.emucontrol import send_data_to_qemu
+from libpebble2.communication import PebbleConnection
+from libpebble2.communication.transports.qemu.protocol import QemuButton, QemuTimeFormat
+from libpebble2.services.install import AppInstaller
+from libpebble2.services.appmessage import AppMessageService, Uint32
+from libpebble2.services.screenshot import Screenshot
+from libpebble2.protocol.system import TimeMessage, SetUTC
+
+package_json = None
+with open('package.json', 'r') as file:
+  package_json = json.load(file)
+
+app_uuid = UUID(package_json['pebble']['uuid'])
+appname = package_json['name']
+target_platforms = package_json['pebble']['targetPlatforms']
+msg_keys = {
+  key: 10000 + i
+  for i, key in enumerate(package_json['pebble']['messageKeys'])
+}
+
+def emulator(platform):
+  print(f'Launching `{platform}` emulator')
+  pebble = PebbleConnection(ManagedEmulatorTransport(platform))
+  pebble.connect()
+  pebble.run_async()
+  print(f'Installing `{appname}.pbw`')
+  AppInstaller(pebble, f'./build/{appname}.pbw').install()
+  sleep(1)
+  return pebble
+
+def for_all_platforms(fn, logs=True):
+  for platform in target_platforms:
+    pebble = emulator(platform)
+    if logs:
+      logger = PebbleLogPrinter(pebble)
+      fn(pebble)
+      logger.stop()
+    else:
+      fn(pebble)
+
+
+def is_color(pebble):
+  return pebble.watch_platform in ['basalt', 'chalk', 'emery']
+
+def send_app_message(pebble, msg):
+  ams = AppMessageService(pebble)
+  tid = ams.send_message(app_uuid, msg)
+
+  # unfortunately the following doesn't work
+  # wait_for_event assumes only one value is returned
+  # but ack returns 2 :(
+
+  # tid2, uuid = ams.wait_for_event('ack')
+  # assert uuid == app_uuid
+  # assert tid2 == tid
+
+def set_time(pebble, hour, minute, year=2013, month=1, day=23, tzinfo=timezone.utc):
+  dt = int(datetime(year, month, day, hour, minute, tzinfo=tzinfo).timestamp())
+  pebble.send_packet(TimeMessage(message=SetUTC(unix_time=dt, utc_offset=0, tz_name="UTC")))
+
+def press_buttons(pebble, buttons, duration=0.1):
+  send_data_to_qemu(pebble.transport, QemuButton(state=buttons))
+  sleep(duration)
+  send_data_to_qemu(pebble.transport, QemuButton(state=0))
+  sleep(0.1)
+
+def press_back(pebble, duration=0.1):
+  press_buttons(pebble, QemuButton.Button.Back, duration)
+def press_up(pebble, duration=0.1):
+  press_buttons(pebble, QemuButton.Button.Up, duration)
+def press_select(pebble, duration=0.1):
+  press_buttons(pebble, QemuButton.Button.Select, duration)
+def press_down(pebble, duration=0.1):
+  press_buttons(pebble, QemuButton.Button.Down, duration)
+
+def set_24_hour_mode(pebble, is_24_hour=True):
+  send_data_to_qemu(pebble.transport, QemuTimeFormat(is_24_hour=is_24_hour))
+
+def screenshot(pebble, name):
+  filename = f'{pebble.watch_platform}/{name}.png'
+  path = './screenshots/' + filename
+  print(f'Taking screenshot `{filename}`')
+  os.makedirs(os.path.dirname(path), exist_ok=True)
+  image = Screenshot(pebble).grab_image()
+  png.from_array(image, 'RGB').save(path)
+
+# ============================================================
+# Code above this line is not specific to the watchface and
+# should probably be eventually split off into its own library
+# ============================================================
+
+def set_colors(pebble, background, digits, frame):
+  def wrap_color(color):
+    if isinstance(color, int):
+      color = hex(color)
+    color = color.removeprefix('0x').removeprefix('#')
+    if len(color) == 3:
+      r, g, b = color
+      color = r + r + g + g + b + b
+    return Uint32(int(color, 16))
+  send_app_message(pebble, {
+    msg_keys["BACKGROUND_COLOR"]: wrap_color(background),
+    msg_keys["DIGIT_COLOR"]: wrap_color(digits),
+    msg_keys["FRAME_COLOR"]: wrap_color(frame),
+  })
+
+def run(pebble):
+  set_24_hour_mode(pebble, True)
+  set_time(pebble, 12, 34)
+  set_colors(pebble, 'FFF', '000', '000')
+  sleep(1.5)
+  screenshot(pebble, '01_white-black-black')
+
+  set_24_hour_mode(pebble, False)
+  set_time(pebble, 16, 59)
+  set_colors(pebble, '000', 'FFF', 'AAA')
+  sleep(1.5)
+  screenshot(pebble, '02_black-white-gray')
+
+  if is_color(pebble):
+    set_24_hour_mode(pebble, True)
+    set_time(pebble, 4, 20)
+    set_colors(pebble, 'FF5', '00F', '00A')
+    sleep(1.5)
+    screenshot(pebble, '03_yellow-blue-blue')
+
+
+if __name__ == '__main__':
+  for_all_platforms(run)