Versió inicial: CLI i GUI Tk per a fonts bitmap
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#!/usr/bin/env python3
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"""Interfaz gráfica Tk para font_gen.
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Selecciona un TTF, ajusta el tamaño y propiedades de la cuadrícula, ve un
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preview en vivo del GIF resultante, y genera los ficheros .gif/.fnt junto
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a este script al pulsar GENERAR.
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"""
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from __future__ import annotations
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import os
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import tkinter as tk
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from tkinter import filedialog, messagebox, ttk
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from PIL import Image, ImageTk
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import font_gen
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SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
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PREVIEW_MAX_W = 720
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PREVIEW_MAX_H = 320
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PREVIEW_DEBOUNCE_MS = 200
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AUTO_MAX_SCALE = 8 # techo del fit automático
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MANUAL_MAX_SCALE = 16 # techo cuando el usuario pulsa +
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class FontGenApp(tk.Tk):
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def __init__(self) -> None:
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super().__init__()
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self.title("font-gen")
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self.minsize(640, 480)
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self._preview_job: str | None = None
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# Mantener una referencia viva a la PhotoImage; si no, Tk la libera
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# en cuanto sale del scope local y el preview aparece en blanco.
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self._preview_img_tk: ImageTk.PhotoImage | None = None
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self._last_result: font_gen.FontBitmapResult | None = None
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self._zoom: int | None = None # None = auto-fit; int = escala explícita
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self.ttf_var = tk.StringVar()
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self.size_var = tk.IntVar(value=8)
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self.output_var = tk.StringVar()
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self.columns_var = tk.IntVar(value=15)
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self.bw_var = tk.StringVar() # "" = auto
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self.bh_var = tk.StringVar() # "" = auto
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self._adv_visible = False
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self._build_ui()
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for v in (self.ttf_var, self.size_var, self.columns_var, self.bw_var, self.bh_var):
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v.trace_add("write", lambda *_: self._schedule_preview())
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# ------------------------------------------------------------------ UI
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def _build_ui(self) -> None:
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root = ttk.Frame(self, padding=8)
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root.pack(fill="both", expand=True)
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row = ttk.Frame(root)
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row.pack(fill="x", pady=(0, 4))
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ttk.Label(row, text="TTF:", width=8).pack(side="left")
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ttk.Entry(row, textvariable=self.ttf_var).pack(side="left", fill="x", expand=True, padx=(0, 4))
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ttk.Button(row, text="Examinar…", command=self._browse_ttf).pack(side="left")
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row = ttk.Frame(root)
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row.pack(fill="x", pady=4)
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ttk.Label(row, text="Tamaño:", width=8).pack(side="left")
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ttk.Spinbox(row, from_=4, to=128, width=5, textvariable=self.size_var).pack(side="left")
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ttk.Label(row, text="Salida:").pack(side="left", padx=(16, 4))
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ttk.Entry(row, textvariable=self.output_var, width=24).pack(side="left")
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self.adv_btn = ttk.Button(root, text="▸ Opciones avanzadas", command=self._toggle_advanced)
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self.adv_btn.pack(anchor="w", pady=(8, 0))
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self.adv_frame = ttk.Frame(root)
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for label, var, w in [
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("Columnas:", self.columns_var, 5),
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("box_width (auto):", self.bw_var, 6),
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("box_height (auto):", self.bh_var, 6),
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]:
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ttk.Label(self.adv_frame, text=label).pack(side="left", padx=(8, 2))
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ttk.Entry(self.adv_frame, textvariable=var, width=w).pack(side="left")
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prev = ttk.LabelFrame(root, text="Preview", padding=8)
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prev.pack(fill="both", expand=True, pady=8)
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# Controles de zoom
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zoom_row = ttk.Frame(prev)
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zoom_row.pack(fill="x", pady=(0, 6))
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ttk.Button(zoom_row, text="−", width=3, command=self._zoom_out).pack(side="left")
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self.zoom_label = ttk.Label(zoom_row, text="Auto", width=6, anchor="center")
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self.zoom_label.pack(side="left", padx=4)
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ttk.Button(zoom_row, text="+", width=3, command=self._zoom_in).pack(side="left")
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ttk.Button(zoom_row, text="Auto", command=self._zoom_auto).pack(side="left", padx=(8, 0))
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# Canvas con scrollbars: deja ver previews mayores que el área visible.
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canvas_frame = ttk.Frame(prev)
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canvas_frame.pack(fill="both", expand=True)
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self.preview_canvas = tk.Canvas(
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canvas_frame, background="#dddddd", highlightthickness=0,
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width=PREVIEW_MAX_W, height=PREVIEW_MAX_H,
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)
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hbar = ttk.Scrollbar(canvas_frame, orient="horizontal", command=self.preview_canvas.xview)
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vbar = ttk.Scrollbar(canvas_frame, orient="vertical", command=self.preview_canvas.yview)
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self.preview_canvas.configure(xscrollcommand=hbar.set, yscrollcommand=vbar.set)
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self.preview_canvas.grid(row=0, column=0, sticky="nsew")
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vbar.grid(row=0, column=1, sticky="ns")
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hbar.grid(row=1, column=0, sticky="ew")
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canvas_frame.rowconfigure(0, weight=1)
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canvas_frame.columnconfigure(0, weight=1)
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self.preview_canvas.create_text(
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10, 10, anchor="nw", fill="#666666",
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text="Selecciona un TTF para ver el preview.",
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tags=("placeholder",),
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)
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self.info_label = ttk.Label(prev, text="", foreground="#555555")
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self.info_label.pack(anchor="w", pady=(4, 0))
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row = ttk.Frame(root)
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row.pack(fill="x")
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self.status_var = tk.StringVar()
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ttk.Label(row, textvariable=self.status_var, foreground="#006600").pack(side="left")
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ttk.Button(row, text="GENERAR", command=self._generate).pack(side="right")
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def _toggle_advanced(self) -> None:
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if self._adv_visible:
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self.adv_frame.pack_forget()
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self.adv_btn.configure(text="▸ Opciones avanzadas")
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else:
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self.adv_frame.pack(fill="x", pady=(4, 0), after=self.adv_btn)
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self.adv_btn.configure(text="▾ Opciones avanzadas")
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self._adv_visible = not self._adv_visible
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def _browse_ttf(self) -> None:
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path = filedialog.askopenfilename(
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title="Selecciona TTF",
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filetypes=[("TrueType / OpenType", "*.ttf *.otf"), ("Todos los archivos", "*.*")],
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)
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if not path:
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return
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self.ttf_var.set(path)
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if not self.output_var.get().strip():
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self.output_var.set(os.path.splitext(os.path.basename(path))[0])
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# ---------------------------------------------------------- Preview flow
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def _schedule_preview(self) -> None:
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# Cualquier cambio en los inputs invalida el último "guardado correcto".
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self.status_var.set("")
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if self._preview_job is not None:
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self.after_cancel(self._preview_job)
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self._preview_job = self.after(PREVIEW_DEBOUNCE_MS, self._update_preview)
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def _update_preview(self) -> None:
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self._preview_job = None
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ttf = self.ttf_var.get().strip()
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if not ttf:
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self._show_preview_error("Selecciona un TTF.")
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return
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if not os.path.isfile(ttf):
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self._show_preview_error(f"No se encuentra el archivo:\n{ttf}")
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return
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# IntVar.get() lanza TclError si el campo está vacío durante la edición.
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try:
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size = self.size_var.get()
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except tk.TclError:
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self._show_preview_error("Tamaño no válido.")
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return
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if not (4 <= size <= 256):
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self._show_preview_error("Tamaño fuera de rango (4–256).")
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return
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try:
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columns = self.columns_var.get()
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except tk.TclError:
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columns = 15
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if columns <= 0:
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columns = 15
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bw = _parse_optional_positive_int(self.bw_var.get())
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bh = _parse_optional_positive_int(self.bh_var.get())
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try:
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result = font_gen.build_font_bitmap(ttf, size, columns, bw, bh)
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except Exception as e:
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self._show_preview_error(f"Error: {e}")
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return
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self._last_result = result
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self._render_preview(result)
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def _render_preview(self, result: font_gen.FontBitmapResult) -> None:
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# Paleta legible para humanos: 0 = blanco (fondo), 1 = negro (glifo).
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# No afecta al GIF que se guardará; este copy es solo para display.
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preview = result.img.copy()
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preview.putpalette([255, 255, 255, 0, 0, 0] + [0] * (768 - 6))
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preview = preview.convert("RGB")
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base_w, base_h = preview.size
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scale = self._effective_scale_for(base_w, base_h)
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if scale > 1:
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preview = preview.resize((base_w * scale, base_h * scale), Image.NEAREST)
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self._preview_img_tk = ImageTk.PhotoImage(preview)
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self.preview_canvas.delete("all")
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self.preview_canvas.configure(background="#ffffff")
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self.preview_canvas.create_image(0, 0, anchor="nw", image=self._preview_img_tk)
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self.preview_canvas.configure(scrollregion=(0, 0, preview.width, preview.height))
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info = (f"{len(result.chars)} chars · "
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f"caja {result.box_width}×{result.box_height} px · "
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f"bitmap {base_w}×{base_h} px (×{scale})")
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if result.fallback_used:
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info += f" · {len(result.fallback_used)} fallback"
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if result.truly_skipped:
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info += f" · {len(result.truly_skipped)} omitidos"
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self.info_label.configure(text=info)
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def _show_preview_error(self, msg: str) -> None:
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self._preview_img_tk = None
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self._last_result = None
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self.preview_canvas.delete("all")
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self.preview_canvas.configure(background="#dddddd")
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self.preview_canvas.create_text(10, 10, anchor="nw", fill="#aa0000", text=msg)
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self.preview_canvas.configure(scrollregion=(0, 0, 0, 0))
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self.info_label.configure(text="")
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# -------------------------------------------------------------- Zoom
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def _effective_scale_for(self, w: int, h: int) -> int:
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if self._zoom is not None:
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return self._zoom
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return max(1, min(AUTO_MAX_SCALE,
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PREVIEW_MAX_W // max(w, 1),
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PREVIEW_MAX_H // max(h, 1)))
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def _zoom_in(self) -> None:
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if self._last_result is None:
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return
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w, h = self._last_result.img.size
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self._zoom = min(MANUAL_MAX_SCALE, self._effective_scale_for(w, h) + 1)
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self._update_zoom_label()
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self._render_preview(self._last_result)
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def _zoom_out(self) -> None:
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if self._last_result is None:
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return
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w, h = self._last_result.img.size
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self._zoom = max(1, self._effective_scale_for(w, h) - 1)
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self._update_zoom_label()
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self._render_preview(self._last_result)
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def _zoom_auto(self) -> None:
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self._zoom = None
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self._update_zoom_label()
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if self._last_result is not None:
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self._render_preview(self._last_result)
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def _update_zoom_label(self) -> None:
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self.zoom_label.configure(text="Auto" if self._zoom is None else f"×{self._zoom}")
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# -------------------------------------------------------------- Generar
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def _generate(self) -> None:
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if self._last_result is None:
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messagebox.showwarning("font-gen", "No hay un preview válido todavía.")
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return
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name = self.output_var.get().strip()
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if not name:
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messagebox.showwarning("font-gen", "Indica un nombre base de salida.")
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return
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ttf = self.ttf_var.get().strip()
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try:
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gif_path, fnt_path = font_gen.save_font_files(
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self._last_result, name, SCRIPT_DIR,
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source_desc=f"{os.path.basename(ttf)} size {self.size_var.get()}",
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)
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except Exception as e:
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messagebox.showerror("font-gen", f"Error al guardar:\n{e}")
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return
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self.status_var.set(
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f"✓ {os.path.basename(gif_path)} y {os.path.basename(fnt_path)} guardados"
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)
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def _parse_optional_positive_int(s: str) -> int | None:
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s = s.strip()
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if not s:
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return None
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try:
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v = int(s)
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return v if v > 0 else None
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except ValueError:
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return None
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def run_gui() -> None:
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app = FontGenApp()
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app.mainloop()
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if __name__ == "__main__":
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run_gui()
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