add timer

frontend/config.py

@@ -13,4 +13,5 @@ MOV_AVG_DEFAULTS = {
 
 class DISPLAY_TYPES(Flag):
     NUMBER = 1
-    CIRCLE = 2
+    CIRCLE = 2
+    TIMER = 4

frontend/views/__init__.py

@@ -1,3 +1,4 @@
 from .number import NumberView
 from .circle import CircleView
+from .timer import TimerView
 from .combined_view import CombinedView

frontend/views/circle.py

@@ -6,6 +6,10 @@ from .base import View
 
 class CircleView(View):
 
+    def __init__(self, parent, size, center, radius_offset=10, **kwargs):
+        self.target_radius = min(center) - radius_offset
+        super().__init__(parent, size, center, **kwargs)
+
     def init_ui(self, parent):
         self.ui = tk.Frame(parent)
         self.ui.pack()
@@ -18,8 +22,7 @@ class CircleView(View):
     def _init_im(self):
         im = Image.new('1', self.size, 'white')
         draw = ImageDraw.Draw(im)
-        self.target_r = min(self.center)-10
+        draw.circle(self.center, self.target_radius,
-        draw.circle(self.center, self.target_r,
                      outline="#000000")
         return im
     
@@ -28,7 +31,7 @@ class CircleView(View):
         bkg_im = self.bkg_im.copy()
         try:
             target = float(self.target.get())
-            weight_radius = weight / target * self.target_r
+            weight_radius = weight / target * self.target_radius
 
             im = Image.new('1', self.size, 'black')
             draw = ImageDraw.Draw(im)

frontend/views/combined_view.py

@@ -5,7 +5,7 @@ from tkinter import Frame, Canvas, ttk, PhotoImage
 from PIL import Image, ImageChops
 
 from ..config import DISPLAY_TYPES
-from . import NumberView, CircleView
+from . import NumberView, CircleView, TimerView
 
 class CombinedView(tk.Frame):
     def __init__(self, parent,
@@ -13,6 +13,7 @@ class CombinedView(tk.Frame):
                  **kwargs):
         super().__init__(parent, **kwargs)
         self.views = []
+        self.timer_view = None  # Timer view is always active
         self.tare_command = tare_command
         self.calibrate_command = calibrate_command
         
@@ -26,12 +27,16 @@ class CombinedView(tk.Frame):
         self.im_size = (168, 144)
         self.center = (168 // 2, 144 // 2)
 
+        # Create timer view that's always active
+        self.timer_view = TimerView(self.actions, self.im_size, self.center)
+
         self.canvas = Canvas(self, width=168, height=144, background='white',
                              highlightthickness=1, highlightbackground="black")
         self.canvas.pack()
 
 
     def update_views(self, selected_types: DISPLAY_TYPES):
+        # Clear only the selectable views, not the timer
         for v in self.views:
             if v.ui is not None:
                 v.ui.destroy()
@@ -48,6 +53,13 @@ class CombinedView(tk.Frame):
 
     def refresh(self, weight: float):
         ims = []
+        
+        # Always include timer view
+        if self.timer_view:
+            timer_im = self.timer_view.update_weight(weight)
+            ims.append(timer_im)
+        
+        # Add other selected views
         for view in self.views:
             im = view.update_weight(weight)
             ims.append(im)

frontend/views/timer.py

@@ -0,0 +1,126 @@
+import tkinter as tk
+from tkinter import ttk
+from PIL import Image, ImageDraw, ImageChops
+import time
+import math
+
+from .base import View
+
+class TimerView(View):
+    def __init__(self, parent, size, center, width=5, **kwargs):
+        self.start_time = None
+        self.elapsed_time = 0
+        self.is_running = False
+        self.goal_minutes = 0  # 0 means no goal set
+        self.radius = min(center)-width
+        self.width = width
+        super().__init__(parent, size, center, **kwargs)
+
+    def init_ui(self, parent):
+        self.ui = tk.Frame(parent)
+        self.ui.pack(pady=10)
+        
+        # Goal input
+        self.goal_label = ttk.Label(self.ui, text="Goal (sec):")
+        self.goal_label.pack()
+        self.goal_entry = ttk.Entry(self.ui, width=8)
+        self.goal_entry.insert(0, "0")
+        self.goal_entry.pack()
+        
+        # Timer buttons
+        self.start_stop_button = ttk.Button(self.ui, text="Start", command=self.toggle_timer)
+        self.start_stop_button.pack(side=tk.LEFT, padx=2)
+        
+        self.reset_button = ttk.Button(self.ui, text="Reset", command=self.reset_timer)
+        self.reset_button.pack(side=tk.LEFT, padx=2)
+
+    def toggle_timer(self):
+        if self.is_running:
+            # Stop timer
+            self.is_running = False
+            if self.start_time:
+                self.elapsed_time += time.time() - self.start_time
+            self.start_stop_button.config(text="Start")
+        else:
+            # Start timer
+            self.is_running = True
+            self.start_time = time.time()
+            self.start_stop_button.config(text="Stop")
+
+    def reset_timer(self):
+        self.is_running = False
+        self.start_time = None
+        self.elapsed_time = 0
+        self.start_stop_button.config(text="Start")
+
+    def get_current_time(self):
+        """Get current elapsed time in seconds"""
+        if self.is_running and self.start_time:
+            return self.elapsed_time + (time.time() - self.start_time)
+        return self.elapsed_time
+
+    def update_weight(self, weight):
+        """Override to update timer display instead of weight"""
+        current_time = self.get_current_time()
+        
+        # Create base image
+        im = self.bkg_im.copy()
+        draw = ImageDraw.Draw(im)
+        
+        # Format time display (MM:SS)
+        minutes = int(current_time // 60)
+        seconds = int(current_time % 60)
+        time_text = f"{minutes:02d}:{seconds:02d}"
+
+        if time_text != "00:00" or self.is_running:
+            # Draw timer text in center
+            # Estimate text size for centering
+            text_width = len(time_text) * 10  # Rough estimate
+            text_height = 20
+            text_x = self.center[0] - text_width // 2
+            text_y = self.center[1] - text_height // 2
+            
+            draw.text((text_x, text_y), time_text, fill='black')
+        
+        # Draw progress circle if goal is set
+        try:
+            goal_sec = float(self.goal_entry.get())
+            if goal_sec > 0:
+                progress = current_time / goal_sec
+            else:
+                progress = current_time / 60
+
+            if progress > 0:
+                inverted = int(progress) % 2 == 1
+                progress = progress % 1.0  # Loop every full circle
+
+                start = self.center[0] - self.radius, self.center[1] - self.radius
+                end = self.center[0] + self.radius, self.center[1] + self.radius
+
+                if inverted:
+                    draw.arc((start, end), 360 * progress - 90, 270, fill='black', width=self.width)
+                else:
+                    draw.arc((start, end), 270, 360 * progress - 90, fill='black', width=self.width)
+    
+        except (ValueError, tk.TclError):
+            # Invalid goal value, just show time without progress
+            pass
+            
+        return im
+
+    def _draw_progress_arc(self, draw, progress):
+        """Draw a progress arc around the outer circle"""
+        if progress <= 0:
+            return
+            
+        # Draw filled arc by drawing multiple lines from center to circumference
+        center_x, center_y = self.center
+        # Start from top (270 degrees) and go clockwise
+        start_angle = 270
+        num_steps = max(1, int(360 * progress))
+        
+        for i in range(num_steps):
+            angle = math.radians(start_angle + i)
+            end_x = center_x + self.outer_radius * math.cos(angle)
+            end_y = center_y + self.outer_radius * math.sin(angle)
+            draw.line([(center_x, center_y), (end_x, end_y)], fill='black', width=1)