import tkinter as tk from tkinter import ttk, messagebox, filedialog import json import os from datetime import datetime class App061: """体重記録アプリ: 日付と体重を記録し、Canvas で折れ線グラフを描画""" DEFAULT_FILE = "weight_records.json" def __init__(self, root): self.root = root self.root.title("体重記録アプリ") self.root.geometry("800x600") self.root.configure(bg="#f8f9fc") # records: [{"date":"YYYY-MM-DD","weight":float}, ...] self.records = [] self._build_ui() self._refresh() def _build_ui(self): """UI を構築する""" # タイトル title_frame = tk.Frame(self.root, bg="#3776ab", pady=12) title_frame.pack(fill=tk.X) tk.Label( title_frame, text="体重記録アプリ", font=("Noto Sans JP", 16, "bold"), bg="#3776ab", fg="white" ).pack() main = tk.Frame(self.root, bg="#f8f9fc", padx=15, pady=15) main.pack(fill=tk.BOTH, expand=True) # 入力フォーム form = ttk.LabelFrame(main, text="記録を追加", padding=10) form.pack(fill=tk.X) ttk.Label(form, text="日付 (YYYY-MM-DD)").grid(row=0, column=0, sticky="w") self.date_var = tk.StringVar(value=datetime.now().strftime("%Y-%m-%d")) ttk.Entry(form, textvariable=self.date_var, width=14).grid(row=0, column=1, padx=8) ttk.Label(form, text="体重 (kg)").grid(row=0, column=2, sticky="w") self.weight_var = tk.StringVar() ttk.Entry(form, textvariable=self.weight_var, width=10).grid(row=0, column=3, padx=8) ttk.Button(form, text="追加", command=self.add_record).grid(row=0, column=4, padx=4) ttk.Button(form, text="選択削除", command=self.remove_selected).grid(row=0, column=5, padx=4) # ファイル操作 file_frame = tk.Frame(main, bg="#f8f9fc") file_frame.pack(fill=tk.X, pady=4) ttk.Button(file_frame, text="JSONに保存", command=self.save).pack(side=tk.LEFT, padx=4) ttk.Button(file_frame, text="JSONから読込", command=self.load).pack(side=tk.LEFT, padx=4) # 中段: グラフ + リスト body = tk.Frame(main, bg="#f8f9fc") body.pack(fill=tk.BOTH, expand=True, pady=4) # グラフ graph_frame = ttk.LabelFrame(body, text="体重推移グラフ", padding=4) graph_frame.grid(row=0, column=0, sticky="nsew", padx=(0, 6)) self.canvas = tk.Canvas(graph_frame, width=460, height=300, bg="white", highlightthickness=1, highlightbackground="#ccc") self.canvas.pack(fill=tk.BOTH, expand=True) # リスト list_frame = ttk.LabelFrame(body, text="記録一覧", padding=4) list_frame.grid(row=0, column=1, sticky="nsew") cols = ("date", "weight") self.tree = ttk.Treeview(list_frame, columns=cols, show="headings", height=12) self.tree.heading("date", text="日付") self.tree.heading("weight", text="体重(kg)") self.tree.column("date", width=110) self.tree.column("weight", width=80, anchor="e") self.tree.pack(fill=tk.BOTH, expand=True) body.columnconfigure(0, weight=2) body.columnconfigure(1, weight=1) body.rowconfigure(0, weight=1) def add_record(self): """記録を追加する""" date_str = self.date_var.get().strip() try: datetime.strptime(date_str, "%Y-%m-%d") except ValueError: messagebox.showwarning("入力エラー", "日付は YYYY-MM-DD 形式で入力してください") return try: weight = float(self.weight_var.get()) if weight <= 0 or weight > 500: raise ValueError except ValueError: messagebox.showwarning("入力エラー", "体重は妥当な数値を入力してください") return # 同日の記録は上書き for r in self.records: if r["date"] == date_str: r["weight"] = weight break else: self.records.append({"date": date_str, "weight": weight}) self.records.sort(key=lambda r: r["date"]) self.weight_var.set("") self._refresh() def remove_selected(self): """選択行を削除する""" sel = self.tree.selection() if not sel: return for item in sel: vals = self.tree.item(item, "values") if vals: self.records = [r for r in self.records if r["date"] != vals[0]] self._refresh() def _refresh(self): """リストとグラフを再描画する""" # リスト更新 for item in self.tree.get_children(): self.tree.delete(item) for r in self.records: self.tree.insert("", tk.END, values=(r["date"], f"{r['weight']:.1f}")) # グラフ更新 self._draw_graph() def _draw_graph(self): """折れ線グラフを Canvas に描画する""" c = self.canvas c.delete("all") w = int(c.winfo_width() or 460) h = int(c.winfo_height() or 300) margin = 40 if not self.records: c.create_text(w / 2, h / 2, text="記録がありません", fill="#999", font=("Noto Sans JP", 12)) return weights = [r["weight"] for r in self.records] wmin, wmax = min(weights), max(weights) if wmin == wmax: wmin -= 1 wmax += 1 # 軸 c.create_line(margin, h - margin, w - margin, h - margin, fill="#666", width=1) c.create_line(margin, margin, margin, h - margin, fill="#666", width=1) # ラベル c.create_text(margin - 5, margin, text=f"{wmax:.1f}", anchor="e", font=("Arial", 9)) c.create_text(margin - 5, h - margin, text=f"{wmin:.1f}", anchor="e", font=("Arial", 9)) # データ点と線 n = len(self.records) plot_w = (w - 2 * margin) plot_h = (h - 2 * margin) points = [] for i, r in enumerate(self.records): x = margin + (plot_w * (i / max(1, n - 1))) y = h - margin - (plot_h * ((r["weight"] - wmin) / (wmax - wmin))) points.append((x, y)) # 線 if len(points) >= 2: for i in range(len(points) - 1): c.create_line(*points[i], *points[i + 1], fill="#3776ab", width=2) # 点 for (x, y), r in zip(points, self.records): c.create_oval(x - 4, y - 4, x + 4, y + 4, fill="#3776ab", outline="white", width=2) c.create_text(x, y - 12, text=f"{r['weight']:.1f}", font=("Arial", 8), fill="#333") # X 軸ラベル: 始点と終点の日付 c.create_text(margin, h - margin + 12, text=self.records[0]["date"], anchor="n", font=("Arial", 8)) c.create_text(w - margin, h - margin + 12, text=self.records[-1]["date"], anchor="n", font=("Arial", 8)) def save(self): """JSON に保存する""" path = filedialog.asksaveasfilename( defaultextension=".json", filetypes=[("JSONファイル", "*.json")], initialfile=self.DEFAULT_FILE, ) if not path: return try: with open(path, "w", encoding="utf-8") as f: json.dump(self.records, f, ensure_ascii=False, indent=2) messagebox.showinfo("保存完了", f"保存しました: {path}") except Exception as e: messagebox.showerror("エラー", f"保存失敗: {e}") def load(self): """JSON から読み込む""" path = filedialog.askopenfilename(filetypes=[("JSONファイル", "*.json")]) if not path or not os.path.exists(path): return try: with open(path, "r", encoding="utf-8") as f: data = json.load(f) self.records = [r for r in data if "date" in r and "weight" in r] self.records.sort(key=lambda r: r["date"]) self._refresh() messagebox.showinfo("読込完了", f"{len(self.records)} 件読み込みました") except Exception as e: messagebox.showerror("エラー", f"読み込み失敗: {e}") if __name__ == "__main__": root = tk.Tk() app = App061(root) root.mainloop()