Gracious
dfe26919ad
- Items (text blocks, emoji) are placed freely: click to select, drag to move, arrow-key nudge, rotate to any angle, resize, duplicate, fit/center - Emoji picker now covers the full emoji set via emoji-data-python (~1,900, 9 categories, name search, hover shows the name); thumbnails are rendered by Pillow with Noto Color Emoji so ZWJ sequences and flags display exactly as they print - Designs save/open as JSON; last design restored on launch
906 lines
33 KiB
Python
906 lines
33 KiB
Python
"""Label designer for Niimbot printers.
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Items (text blocks and emoji) are placed freely on the label canvas: click to
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select, drag to move, arrow keys to nudge, rotate/resize from the side panel.
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"""
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import json
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import re
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import threading
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import tkinter as tk
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from dataclasses import asdict, dataclass, field
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from pathlib import Path
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from tkinter import filedialog, messagebox, ttk
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import emoji_data_python
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from PIL import Image, ImageDraw, ImageFont, ImageOps, ImageTk
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from niimprint import (
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MODELS,
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BluetoothTransport,
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PrinterClient,
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PrinterError,
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SerialTransport,
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prepare_print,
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)
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PX_PER_MM = 8
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SETTINGS_PATH = Path.home() / ".config" / "niimprint-label" / "settings.json"
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DEFAULT_ADDR = "94:11:02:66:16:4D" # your D101 — change in the app, it is remembered
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TEXT_FONTS = {
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"bold": "/usr/share/fonts/TTF/DejaVuSans-Bold.ttf",
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"regular": "/usr/share/fonts/TTF/DejaVuSans.ttf",
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}
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EMOJI_FONT = "/usr/share/fonts/noto/NotoColorEmoji.ttf"
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EMOJI_FONT_SIZE = 109 # Noto Color Emoji is a bitmap font; only this size loads
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EMOJI_GAMMA = 3.0 # >1 darkens emoji so they survive 1-bit dithering
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EMOJI_SCALE = 1.15 # emoji height relative to text size
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PICKER_PX = 26 # thumbnail size in the emoji picker
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# (name, width mm, length mm) — width is the short side (tape width)
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LABEL_PRESETS = [
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("12 x 40 mm", 12, 40),
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("12 x 30 mm", 12, 30),
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("12 x 22 mm", 12, 22),
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("15 x 30 mm", 15, 30),
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("Custom", None, None),
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]
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EMOJI_CATEGORIES = [
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("Smileys", "Smileys & Emotion"),
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("People", "People & Body"),
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("Animals", "Animals & Nature"),
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("Food", "Food & Drink"),
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("Travel", "Travel & Places"),
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("Activities", "Activities"),
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("Objects", "Objects"),
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("Symbols", "Symbols"),
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("Flags", "Flags"),
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]
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def _rng(a: int, b: int) -> str:
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return f"{chr(a)}-{chr(b)}"
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# Matches one emoji cluster: base + optional VS16 / skin tone + ZWJ continuations
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_EMOJI_BASE = (
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"["
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+ _rng(0x1F000, 0x1FAFF)
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+ _rng(0x2600, 0x27BF)
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+ _rng(0x2B00, 0x2BFF)
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+ _rng(0x2300, 0x23FF)
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+ _rng(0x2190, 0x21FF)
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+ _rng(0x25A0, 0x25FF)
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+ _rng(0x2900, 0x297F)
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+ "".join(chr(c) for c in (0x3030, 0x303D, 0x3297, 0x3299, 0xA9, 0xAE, 0x2122))
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+ "]"
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)
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_VS = f"[{chr(0xFE0F)}{chr(0xFE0E)}]?"
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_SKIN = f"[{_rng(0x1F3FB, 0x1F3FF)}]?"
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_ZWJ = chr(0x200D)
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EMOJI_RE = re.compile(f"(?:{_EMOJI_BASE}{_VS}{_SKIN}(?:{_ZWJ}{_EMOJI_BASE}{_VS})*)")
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# --------------------------------------------------------------------------- emoji db
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def load_emoji_db():
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"""Return {category label: [(char, name), ...]} ordered like the emoji keyboard."""
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by_cat = {label: [] for label, _ in EMOJI_CATEGORIES}
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cat_label = {full: label for label, full in EMOJI_CATEGORIES}
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for e in sorted(emoji_data_python.emoji_data, key=lambda e: e.sort_order):
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label = cat_label.get(e.category)
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if label and not e.obsoleted_by:
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by_cat[label].append((e.char, e.name.title()))
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return by_cat
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# --------------------------------------------------------------------------- render
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_emoji_font = None
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_emoji_cache: dict[tuple[str, int], Image.Image] = {}
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_text_font_cache: dict[tuple[bool, int], ImageFont.FreeTypeFont] = {}
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def text_font(bold: bool, size: int) -> ImageFont.FreeTypeFont:
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key = (bold, size)
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if key not in _text_font_cache:
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path = TEXT_FONTS["bold" if bold else "regular"]
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_text_font_cache[key] = ImageFont.truetype(path, size)
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return _text_font_cache[key]
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def _emoji_rgba(cluster: str) -> Image.Image:
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"""Render one emoji cluster with Noto Color Emoji, tightly cropped, RGBA."""
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global _emoji_font
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if _emoji_font is None:
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_emoji_font = ImageFont.truetype(EMOJI_FONT, EMOJI_FONT_SIZE)
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left, top, right, bottom = _emoji_font.getbbox(cluster)
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tile = Image.new("RGBA", (max(right, 1), max(bottom, 1)), (255, 255, 255, 0))
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ImageDraw.Draw(tile).text((0, 0), cluster, font=_emoji_font, embedded_color=True)
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return tile.crop((left, top, right, bottom))
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def render_emoji(cluster: str, height: int) -> Image.Image:
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"""Render one emoji cluster as a grayscale tile of the given height."""
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key = (cluster, height)
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if key in _emoji_cache:
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return _emoji_cache[key]
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tile = _emoji_rgba(cluster)
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# Flatten alpha onto white, then scale to line height
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bg = Image.new("RGB", tile.size, "white")
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bg.paste(tile, mask=tile.split()[3])
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scale = height / tile.height
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tile = bg.resize((max(1, round(tile.width * scale)), height), Image.LANCZOS)
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# Thermal print is 1-bit: darken mid-tones so pale colours don't dither away
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gray = tile.convert("L").point(lambda v: round(255 * (v / 255) ** EMOJI_GAMMA))
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_emoji_cache[key] = gray
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return gray
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def emoji_thumbnail(cluster: str, px: int = PICKER_PX) -> Image.Image:
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"""Colour thumbnail for the picker, rendered by the same font that prints."""
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tile = _emoji_rgba(cluster)
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tile.thumbnail((px, px), Image.LANCZOS)
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return tile
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def _tokenize(line: str):
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"""Split a line into ("text", str) and ("emoji", str) runs."""
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pos = 0
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for m in EMOJI_RE.finditer(line):
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if m.start() > pos:
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yield ("text", line[pos : m.start()])
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yield ("emoji", m.group())
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pos = m.end()
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if pos < len(line):
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yield ("text", line[pos:])
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def render_text_block(text: str, size: int, bold: bool, align: str) -> Image.Image:
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"""Render multi-line text (with inline emoji) as a tight grayscale block."""
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font = text_font(bold, size)
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ascent, descent = font.getmetrics()
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emoji_h = round(size * EMOJI_SCALE)
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line_h = max(ascent + descent, emoji_h)
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rows = []
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for line in text.splitlines() or [""]:
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runs, width = [], 0
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for kind, s in _tokenize(line):
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if kind == "text":
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w = round(font.getlength(s))
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runs.append(("text", s, w))
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else:
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tile = render_emoji(s, emoji_h)
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w = tile.width + 2
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runs.append(("emoji", tile, w))
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width += w
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rows.append((width, runs))
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block_w = max(1, max(w for w, _ in rows))
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block_h = line_h * len(rows)
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img = Image.new("L", (block_w, block_h), 255)
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draw = ImageDraw.Draw(img)
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y = 0
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for row_w, runs in rows:
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if align == "left":
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x = 0
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elif align == "right":
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x = block_w - row_w
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else:
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x = (block_w - row_w) // 2
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for kind, obj, w in runs:
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if kind == "text":
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draw.text((x, y + (line_h - ascent) // 2), obj, font=font, fill=0)
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else:
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img.paste(obj, (x + 1, y + (line_h - obj.height) // 2))
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x += w
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y += line_h
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return img
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@dataclass
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class Item:
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kind: str # "text" | "emoji"
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text: str
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x: int # centre, label px
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y: int
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size: int = 40
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angle: int = 0 # degrees clockwise
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bold: bool = True
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align: str = "center"
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def sprite(self) -> Image.Image:
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if self.kind == "emoji":
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img = render_emoji(self.text, max(8, round(self.size * EMOJI_SCALE)))
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else:
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img = render_text_block(self.text, max(8, self.size), self.bold, self.align)
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if self.angle % 360:
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img = img.rotate(
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-self.angle, expand=True, fillcolor=255, resample=Image.BICUBIC
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)
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return img
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@dataclass
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class Design:
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width_mm: int = 12
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length_mm: int = 40
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preset: str = "12 x 40 mm"
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items: list[Item] = field(default_factory=list)
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@property
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def size_px(self) -> tuple[int, int]:
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"""Landscape (width, height): length along x, tape width along y."""
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return self.length_mm * PX_PER_MM, self.width_mm * PX_PER_MM
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def render(self):
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"""Return (grayscale image, [bbox per item])."""
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w, h = self.size_px
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img = Image.new("L", (w, h), 255)
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boxes = []
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for item in self.items:
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sprite = item.sprite()
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x0 = item.x - sprite.width // 2
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y0 = item.y - sprite.height // 2
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img.paste(sprite, (x0, y0), mask=ImageOps.invert(sprite))
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boxes.append((x0, y0, x0 + sprite.width, y0 + sprite.height))
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return img, boxes
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def to_dict(self) -> dict:
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return {
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"width_mm": self.width_mm,
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"length_mm": self.length_mm,
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"preset": self.preset,
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"items": [asdict(i) for i in self.items],
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}
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@classmethod
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def from_dict(cls, d: dict) -> "Design":
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return cls(
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width_mm=int(d.get("width_mm", 12)),
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length_mm=int(d.get("length_mm", 40)),
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preset=d.get("preset", "12 x 40 mm" if not d else "Custom"),
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items=[Item(**i) for i in d.get("items", [])],
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)
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# --------------------------------------------------------------------------- app
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class LabelApp(tk.Tk):
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def __init__(self):
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super().__init__()
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self.title("Niimbot Label Designer")
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self.minsize(1100, 640)
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self.settings = self._load_settings()
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self.design = Design.from_dict(self.settings.get("design", {}))
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if not self.design.items and "text" in self.settings: # migrate old settings
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w, h = self.design.size_px
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self.design.items.append(
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Item("text", self.settings["text"], w // 2, h // 2)
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)
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self.emoji_db = load_emoji_db()
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self.selected: Item | None = None
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self._boxes: list[tuple[int, int, int, int]] = []
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self._render_job = None
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self._printer = None
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self._photo = None
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self._syncing = False
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self._drag = None
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self.zoom = 2
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self.preset = tk.StringVar(value=self.design.preset)
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self.width_mm = tk.IntVar(value=self.design.width_mm)
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self.length_mm = tk.IntVar(value=self.design.length_mm)
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self.model = tk.StringVar(value=self.settings.get("model", "d101"))
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self.conn = tk.StringVar(value=self.settings.get("conn", "bluetooth"))
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self.addr = tk.StringVar(value=self.settings.get("addr", DEFAULT_ADDR))
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self.density = tk.IntVar(value=self.settings.get("density", 3))
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self.copies = tk.IntVar(value=1)
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self.status = tk.StringVar(value="Ready")
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self.search = tk.StringVar()
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# selected-item properties
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self.p_size = tk.IntVar(value=40)
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self.p_angle = tk.IntVar(value=0)
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self.p_bold = tk.BooleanVar(value=True)
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self.p_align = tk.StringVar(value="center")
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self.p_x = tk.IntVar(value=0)
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self.p_y = tk.IntVar(value=0)
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self._build_ui()
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self.preset.trace_add("write", lambda *_: self._apply_preset())
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for var in (self.width_mm, self.length_mm):
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var.trace_add("write", lambda *_: self._size_changed())
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for var in (
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self.p_size, self.p_angle, self.p_bold, self.p_align, self.p_x, self.p_y
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): # fmt: skip
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var.trace_add("write", lambda *_: self._props_changed())
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self.search.trace_add("write", lambda *_: self._search_changed())
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for var in (self.model, self.conn, self.addr):
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var.trace_add("write", lambda *_: self._disconnect())
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self._apply_preset()
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if not self.design.items:
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self.add_text("Hello 👋")
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self._select(self.design.items[-1])
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self.protocol("WM_DELETE_WINDOW", self._on_close)
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# ---- UI construction
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def _build_ui(self):
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root = ttk.Frame(self, padding=8)
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root.pack(fill="both", expand=True)
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root.columnconfigure(1, weight=1)
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root.rowconfigure(0, weight=1)
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left = ttk.Frame(root)
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left.grid(row=0, column=0, sticky="nsw", padx=(0, 8))
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right = ttk.Frame(root)
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right.grid(row=0, column=1, sticky="nsew")
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right.columnconfigure(0, weight=1)
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right.rowconfigure(2, weight=1)
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self._build_size_box(left)
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self._build_emoji_picker(left)
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self._build_printer_box(left)
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self._build_toolbar(right)
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self._build_canvas(right)
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self._build_props(right)
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self._build_actions(right)
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def _build_size_box(self, parent):
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box = ttk.LabelFrame(parent, text="Label", padding=6)
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box.pack(fill="x")
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ttk.Combobox(
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box,
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textvariable=self.preset,
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values=[p[0] for p in LABEL_PRESETS],
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state="readonly",
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width=12,
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).grid(row=0, column=0, columnspan=2, sticky="w")
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ttk.Label(box, text="W mm").grid(row=0, column=2, sticky="e", padx=(8, 2))
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self.width_spin = ttk.Spinbox(
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box, from_=6, to=60, textvariable=self.width_mm, width=4
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)
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self.width_spin.grid(row=0, column=3)
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ttk.Label(box, text="L mm").grid(row=0, column=4, sticky="e", padx=(6, 2))
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self.length_spin = ttk.Spinbox(
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box, from_=10, to=200, textvariable=self.length_mm, width=4
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)
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self.length_spin.grid(row=0, column=5)
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def _build_emoji_picker(self, parent):
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box = ttk.LabelFrame(parent, text="Emoji — click to add to label", padding=4)
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box.pack(fill="both", expand=True, pady=(8, 0))
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top = ttk.Frame(box)
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top.pack(fill="x")
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ttk.Label(top, text="Search").pack(side="left")
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ttk.Entry(top, textvariable=self.search, width=24).pack(
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side="left", fill="x", expand=True, padx=(4, 0)
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)
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self.hover_name = ttk.Label(box, text=" ", foreground="#555")
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self.hover_name.pack(fill="x")
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self.nb = ttk.Notebook(box, width=420, height=260)
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self.nb.pack(fill="both", expand=True)
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self.emoji_index: dict[tk.Text, list[tuple[str, str]]] = {}
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for label, _ in EMOJI_CATEGORIES:
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self._make_emoji_tab(label, self.emoji_db[label])
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self.search_tab = self._make_emoji_tab("Search", [])
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self.nb.hide(self.search_tab.master)
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def _make_emoji_tab(self, label, entries) -> tk.Text:
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frame = ttk.Frame(self.nb)
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self.nb.add(frame, text=label)
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txt = tk.Text(
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frame,
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wrap="char",
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cursor="hand2",
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spacing1=2,
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spacing3=2,
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padx=4,
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relief="flat",
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highlightthickness=0,
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)
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sb = ttk.Scrollbar(frame, command=txt.yview)
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txt.configure(yscrollcommand=sb.set)
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sb.pack(side="right", fill="y")
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txt.pack(side="left", fill="both", expand=True)
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txt.bind("<Button-1>", self._picker_click)
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txt.bind("<Motion>", self._picker_hover)
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txt.bind("<Leave>", lambda e: self.hover_name.configure(text=" "))
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self._fill_emoji_tab(txt, entries)
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return txt
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def _fill_emoji_tab(self, txt: tk.Text, entries):
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txt.configure(state="normal")
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txt.delete("1.0", "end")
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photos = []
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for i, (char, _name) in enumerate(entries):
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photo = ImageTk.PhotoImage(emoji_thumbnail(char))
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photos.append(photo) # keep references alive
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txt.image_create("end", image=photo, padx=3, pady=1)
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txt.tag_add(f"e{i}", "end-2c", "end-1c")
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txt.configure(state="disabled")
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txt.photos = photos
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self.emoji_index[txt] = list(entries)
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def _picker_entry(self, event):
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txt = event.widget
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for tag in txt.tag_names(f"@{event.x},{event.y}"):
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if tag.startswith("e") and tag[1:].isdigit():
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return self.emoji_index[txt][int(tag[1:])]
|
|
return None
|
|
|
|
def _picker_hover(self, event):
|
|
entry = self._picker_entry(event)
|
|
self.hover_name.configure(text=entry[1] if entry else " ")
|
|
|
|
def _picker_click(self, event):
|
|
entry = self._picker_entry(event)
|
|
if entry:
|
|
self.add_emoji(entry[0])
|
|
return "break"
|
|
|
|
def _search_changed(self):
|
|
q = self.search.get().strip().lower()
|
|
if not q:
|
|
self.nb.hide(self.search_tab.master)
|
|
return
|
|
hits = [
|
|
(c, n)
|
|
for entries in self.emoji_db.values()
|
|
for c, n in entries
|
|
if q in n.lower()
|
|
][:300]
|
|
self._fill_emoji_tab(self.search_tab, hits)
|
|
self.nb.add(self.search_tab.master, text=f"Search ({len(hits)})")
|
|
self.nb.select(self.search_tab.master)
|
|
|
|
def _build_printer_box(self, parent):
|
|
box = ttk.LabelFrame(parent, text="Printer", padding=6)
|
|
box.pack(fill="x", pady=(8, 0))
|
|
ttk.Label(box, text="Model").grid(row=0, column=0, sticky="w")
|
|
ttk.Combobox(
|
|
box, textvariable=self.model, values=list(MODELS), state="readonly", width=6
|
|
).grid(row=0, column=1, sticky="w")
|
|
ttk.Label(box, text="Via").grid(row=0, column=2, sticky="w", padx=(8, 0))
|
|
ttk.Combobox(
|
|
box,
|
|
textvariable=self.conn,
|
|
values=["bluetooth", "usb"],
|
|
state="readonly",
|
|
width=9,
|
|
).grid(row=0, column=3, sticky="w")
|
|
ttk.Label(box, text="Address").grid(row=1, column=0, sticky="w")
|
|
ttk.Entry(box, textvariable=self.addr, width=22).grid(
|
|
row=1, column=1, columnspan=3, sticky="we", pady=(4, 0)
|
|
)
|
|
ttk.Label(box, text="Density").grid(row=2, column=0, sticky="w")
|
|
ttk.Spinbox(box, from_=1, to=5, textvariable=self.density, width=4).grid(
|
|
row=2, column=1, sticky="w", pady=(4, 0)
|
|
)
|
|
ttk.Label(box, text="Copies").grid(row=2, column=2, sticky="w", padx=(8, 0))
|
|
ttk.Spinbox(box, from_=1, to=20, textvariable=self.copies, width=4).grid(
|
|
row=2, column=3, sticky="w", pady=(4, 0)
|
|
)
|
|
|
|
def _build_toolbar(self, parent):
|
|
bar = ttk.Frame(parent)
|
|
bar.grid(row=0, column=0, sticky="we")
|
|
|
|
def btn(text, cmd, **kw):
|
|
ttk.Button(bar, text=text, command=cmd, **kw).pack(side="left", padx=(0, 4))
|
|
|
|
def sep():
|
|
ttk.Separator(bar, orient="vertical").pack(side="left", fill="y", padx=6)
|
|
|
|
btn("+ Text", lambda: self.add_text("Text"))
|
|
btn("Duplicate", self.duplicate_selected)
|
|
btn("Delete", self.delete_selected)
|
|
sep()
|
|
btn("⟲ 90°", lambda: self.rotate(-90), width=6)
|
|
btn("⟳ 90°", lambda: self.rotate(90), width=6)
|
|
sep()
|
|
btn("Center H", lambda: self.center("h"))
|
|
btn("Center V", lambda: self.center("v"))
|
|
btn("Fit", self.fit_selected)
|
|
sep()
|
|
btn("Open…", self.open_design)
|
|
btn("Save…", self.save_design)
|
|
btn("New", self.new_design)
|
|
|
|
def _build_canvas(self, parent):
|
|
ttk.Label(
|
|
parent,
|
|
text="Drag items to move · arrow keys nudge (Shift = 10px) · Delete removes",
|
|
foreground="#555",
|
|
).grid(row=1, column=0, sticky="w", pady=(6, 2))
|
|
holder = tk.Frame(parent, bg="#777")
|
|
holder.grid(row=2, column=0, sticky="nsew")
|
|
self.canvas = tk.Canvas(holder, bg="#777", highlightthickness=0)
|
|
self.canvas.place(relx=0.5, rely=0.5, anchor="center")
|
|
self.canvas.bind("<ButtonPress-1>", self._canvas_press)
|
|
self.canvas.bind("<B1-Motion>", self._canvas_drag)
|
|
self.canvas.bind("<ButtonRelease-1>", lambda e: setattr(self, "_drag", None))
|
|
for key, dx, dy in (
|
|
("Left", -1, 0),
|
|
("Right", 1, 0),
|
|
("Up", 0, -1),
|
|
("Down", 0, 1),
|
|
):
|
|
self.canvas.bind(f"<{key}>", lambda e, dx=dx, dy=dy: self.nudge(dx, dy))
|
|
self.canvas.bind(
|
|
f"<Shift-{key}>", lambda e, dx=dx, dy=dy: self.nudge(dx * 10, dy * 10)
|
|
)
|
|
self.canvas.bind("<Delete>", lambda e: self.delete_selected())
|
|
self.canvas.bind("<BackSpace>", lambda e: self.delete_selected())
|
|
self.size_label = ttk.Label(parent, text="")
|
|
self.size_label.grid(row=3, column=0, sticky="w")
|
|
|
|
def _build_props(self, parent):
|
|
box = ttk.LabelFrame(parent, text="Selected item", padding=6)
|
|
box.grid(row=4, column=0, sticky="we", pady=(6, 0))
|
|
box.columnconfigure(0, weight=1)
|
|
self.prop_text = tk.Text(box, height=3, width=40, font=("DejaVu Sans", 12))
|
|
self.prop_text.grid(row=0, column=0, sticky="we")
|
|
self.prop_text.bind("<<Modified>>", self._prop_text_modified)
|
|
|
|
grid = ttk.Frame(box)
|
|
grid.grid(row=0, column=1, sticky="n", padx=(10, 0))
|
|
ttk.Label(grid, text="Size").grid(row=0, column=0, sticky="w")
|
|
ttk.Spinbox(grid, from_=8, to=300, textvariable=self.p_size, width=5).grid(
|
|
row=0, column=1, sticky="w"
|
|
)
|
|
ttk.Label(grid, text="Angle").grid(row=0, column=2, sticky="w", padx=(10, 0))
|
|
ttk.Spinbox(
|
|
grid, from_=-180, to=359, increment=15, textvariable=self.p_angle, width=5
|
|
).grid(row=0, column=3, sticky="w")
|
|
ttk.Label(grid, text="X").grid(row=1, column=0, sticky="w", pady=(4, 0))
|
|
ttk.Spinbox(grid, from_=-500, to=2000, textvariable=self.p_x, width=5).grid(
|
|
row=1, column=1, sticky="w", pady=(4, 0)
|
|
)
|
|
ttk.Label(grid, text="Y").grid(row=1, column=2, sticky="w", padx=(10, 0))
|
|
ttk.Spinbox(grid, from_=-500, to=2000, textvariable=self.p_y, width=5).grid(
|
|
row=1, column=3, sticky="w", pady=(4, 0)
|
|
)
|
|
style = ttk.Frame(grid)
|
|
style.grid(row=2, column=0, columnspan=4, sticky="w", pady=(4, 0))
|
|
self.bold_check = ttk.Checkbutton(style, text="Bold", variable=self.p_bold)
|
|
self.bold_check.pack(side="left")
|
|
self.align_btns = []
|
|
for a in ("left", "center", "right"):
|
|
b = ttk.Radiobutton(style, text=a.title(), value=a, variable=self.p_align)
|
|
b.pack(side="left", padx=(6, 0))
|
|
self.align_btns.append(b)
|
|
|
|
def _build_actions(self, parent):
|
|
bar = ttk.Frame(parent)
|
|
bar.grid(row=5, column=0, sticky="we", pady=(8, 0))
|
|
self.print_btn = ttk.Button(bar, text="Print", command=self.print_label)
|
|
self.print_btn.pack(side="left")
|
|
ttk.Button(bar, text="Save PNG…", command=self.save_png).pack(
|
|
side="left", padx=(6, 0)
|
|
)
|
|
ttk.Label(bar, textvariable=self.status).pack(side="right")
|
|
|
|
# ---- label size
|
|
|
|
def _apply_preset(self):
|
|
for name, w, length in LABEL_PRESETS:
|
|
if name == self.preset.get() and w is not None:
|
|
self.width_mm.set(w)
|
|
self.length_mm.set(length)
|
|
state = "disabled"
|
|
break
|
|
else:
|
|
state = "normal"
|
|
self.width_spin.configure(state=state)
|
|
self.length_spin.configure(state=state)
|
|
self.design.preset = self.preset.get()
|
|
self._size_changed()
|
|
|
|
def _size_changed(self):
|
|
try:
|
|
self.design.width_mm = max(1, self.width_mm.get())
|
|
self.design.length_mm = max(1, self.length_mm.get())
|
|
except tk.TclError:
|
|
return
|
|
w, h = self.design.size_px
|
|
self.zoom = max(1, min(4, 720 // w))
|
|
self.canvas.configure(width=w * self.zoom, height=h * self.zoom)
|
|
self.schedule_render()
|
|
|
|
# ---- items
|
|
|
|
def add_text(self, text: str):
|
|
w, h = self.design.size_px
|
|
item = Item("text", text, w // 2, h // 2, size=min(40, h // 2))
|
|
self.design.items.append(item)
|
|
self._select(item)
|
|
|
|
def add_emoji(self, char: str):
|
|
w, h = self.design.size_px
|
|
n = sum(1 for i in self.design.items if i.kind == "emoji")
|
|
x = min(w - 20, 30 + n * 20) if n else w // 2
|
|
size = min(40, round(h / EMOJI_SCALE) - 8)
|
|
item = Item("emoji", char, x, h // 2, size=size)
|
|
self.design.items.append(item)
|
|
self._select(item)
|
|
|
|
def duplicate_selected(self):
|
|
if self.selected:
|
|
copy = Item(**asdict(self.selected))
|
|
copy.x += 10
|
|
copy.y += 10
|
|
self.design.items.append(copy)
|
|
self._select(copy)
|
|
|
|
def delete_selected(self):
|
|
if self.selected in self.design.items:
|
|
self.design.items.remove(self.selected)
|
|
self._select(self.design.items[-1] if self.design.items else None)
|
|
|
|
def rotate(self, delta: int):
|
|
if self.selected:
|
|
self.p_angle.set((self.selected.angle + delta) % 360)
|
|
|
|
def center(self, axis: str):
|
|
if self.selected:
|
|
w, h = self.design.size_px
|
|
if axis == "h":
|
|
self.p_x.set(w // 2)
|
|
else:
|
|
self.p_y.set(h // 2)
|
|
|
|
def fit_selected(self):
|
|
"""Resize the selected item to fill the label, and centre it."""
|
|
item = self.selected
|
|
if not item:
|
|
return
|
|
w, h = self.design.size_px
|
|
size = 300
|
|
while size > 8:
|
|
item.size = size
|
|
sp = item.sprite()
|
|
if sp.width <= w - 8 and sp.height <= h - 8:
|
|
break
|
|
size -= max(1, size // 20)
|
|
self.p_size.set(item.size)
|
|
self.p_x.set(w // 2)
|
|
self.p_y.set(h // 2)
|
|
|
|
def nudge(self, dx: int, dy: int):
|
|
if self.selected:
|
|
self.p_x.set(self.selected.x + dx)
|
|
self.p_y.set(self.selected.y + dy)
|
|
|
|
def _select(self, item: Item | None):
|
|
self.selected = item
|
|
self._syncing = True
|
|
try:
|
|
self.prop_text.configure(state="normal")
|
|
self.prop_text.delete("1.0", "end")
|
|
if item:
|
|
self.prop_text.insert("1.0", item.text)
|
|
self.p_size.set(item.size)
|
|
self.p_angle.set(item.angle)
|
|
self.p_bold.set(item.bold)
|
|
self.p_align.set(item.align)
|
|
self.p_x.set(item.x)
|
|
self.p_y.set(item.y)
|
|
self.prop_text.edit_modified(False)
|
|
is_text = bool(item and item.kind == "text")
|
|
self.prop_text.configure(state="normal" if is_text else "disabled")
|
|
self.bold_check.configure(state="normal" if is_text else "disabled")
|
|
for b in self.align_btns:
|
|
b.configure(state="normal" if is_text else "disabled")
|
|
finally:
|
|
self._syncing = False
|
|
self.schedule_render()
|
|
|
|
def _props_changed(self):
|
|
if self._syncing or not self.selected:
|
|
return
|
|
try:
|
|
self.selected.size = self.p_size.get()
|
|
self.selected.angle = self.p_angle.get()
|
|
self.selected.bold = self.p_bold.get()
|
|
self.selected.align = self.p_align.get()
|
|
self.selected.x = self.p_x.get()
|
|
self.selected.y = self.p_y.get()
|
|
except tk.TclError:
|
|
return # spinbox mid-edit
|
|
self.schedule_render()
|
|
|
|
def _prop_text_modified(self, _event=None):
|
|
if self.prop_text.edit_modified():
|
|
self.prop_text.edit_modified(False)
|
|
if not self._syncing and self.selected and self.selected.kind == "text":
|
|
self.selected.text = self.prop_text.get("1.0", "end-1c")
|
|
self.schedule_render()
|
|
|
|
# ---- canvas
|
|
|
|
def _canvas_press(self, event):
|
|
self.canvas.focus_set()
|
|
x, y = event.x / self.zoom, event.y / self.zoom
|
|
hit = None
|
|
for item, box in reversed(list(zip(self.design.items, self._boxes))):
|
|
if box[0] - 3 <= x <= box[2] + 3 and box[1] - 3 <= y <= box[3] + 3:
|
|
hit = item
|
|
break
|
|
if hit is not self.selected:
|
|
self._select(hit)
|
|
if hit:
|
|
self._drag = (event.x, event.y, hit.x, hit.y)
|
|
|
|
def _canvas_drag(self, event):
|
|
if not self._drag or not self.selected:
|
|
return
|
|
sx, sy, ox, oy = self._drag
|
|
self.p_x.set(ox + round((event.x - sx) / self.zoom))
|
|
self.p_y.set(oy + round((event.y - sy) / self.zoom))
|
|
|
|
def schedule_render(self):
|
|
if self._render_job:
|
|
self.after_cancel(self._render_job)
|
|
self._render_job = self.after(30, self.render_canvas)
|
|
|
|
def render_canvas(self):
|
|
self._render_job = None
|
|
try:
|
|
img, self._boxes = self.design.render()
|
|
except (ValueError, OSError) as exc:
|
|
self.status.set(f"Render error: {exc}")
|
|
return
|
|
preview = img.convert("1").convert("L") # dithered, as the printer sees it
|
|
z = self.zoom
|
|
self._photo = ImageTk.PhotoImage(
|
|
preview.resize((img.width * z, img.height * z), Image.NEAREST)
|
|
)
|
|
self.canvas.delete("all")
|
|
self.canvas.create_image(0, 0, image=self._photo, anchor="nw")
|
|
if self.selected in self.design.items:
|
|
x0, y0, x1, y1 = self._boxes[self.design.items.index(self.selected)]
|
|
self.canvas.create_rectangle(
|
|
x0 * z - 2, y0 * z - 2, x1 * z + 2, y1 * z + 2,
|
|
outline="#1e88e5", width=2, dash=(4, 3),
|
|
) # fmt: skip
|
|
w, h = img.size
|
|
model = MODELS[self.model.get()]
|
|
warn = ""
|
|
if h > model.max_width_px:
|
|
warn = f" ⚠ too wide for {model.name.upper()} (max {model.max_width_px}px)"
|
|
self.size_label.configure(
|
|
text=f"{w} x {h} px ({self.design.length_mm} x {self.design.width_mm} mm)"
|
|
f" · {len(self.design.items)} items{warn}"
|
|
)
|
|
|
|
# ---- designs
|
|
|
|
def new_design(self):
|
|
if self.design.items and not messagebox.askyesno(
|
|
"New label", "Clear all items?"
|
|
):
|
|
return
|
|
self.design.items.clear()
|
|
self._select(None)
|
|
|
|
def save_design(self):
|
|
path = filedialog.asksaveasfilename(
|
|
defaultextension=".json", filetypes=[("Label design", "*.json")]
|
|
)
|
|
if path:
|
|
Path(path).write_text(json.dumps(self.design.to_dict(), indent=2))
|
|
self.status.set(f"Saved {Path(path).name}")
|
|
|
|
def open_design(self):
|
|
path = filedialog.askopenfilename(filetypes=[("Label design", "*.json")])
|
|
if not path:
|
|
return
|
|
try:
|
|
self.design = Design.from_dict(json.loads(Path(path).read_text()))
|
|
except (OSError, ValueError, TypeError) as exc:
|
|
messagebox.showerror("Cannot open", str(exc))
|
|
return
|
|
self.preset.set(self.design.preset)
|
|
self.width_mm.set(self.design.width_mm)
|
|
self.length_mm.set(self.design.length_mm)
|
|
self._select(self.design.items[-1] if self.design.items else None)
|
|
|
|
def save_png(self):
|
|
path = filedialog.asksaveasfilename(
|
|
defaultextension=".png", filetypes=[("PNG image", "*.png")]
|
|
)
|
|
if path:
|
|
self.design.render()[0].convert("1").save(path)
|
|
self.status.set(f"Saved {Path(path).name}")
|
|
|
|
# ---- printing
|
|
|
|
def _connect(self) -> PrinterClient:
|
|
if self._printer is None:
|
|
addr = self.addr.get().strip()
|
|
if self.conn.get() == "bluetooth":
|
|
if not re.fullmatch(r"([0-9A-Fa-f]{2}:){5}[0-9A-Fa-f]{2}", addr):
|
|
raise ValueError("Enter the printer's Bluetooth MAC address")
|
|
transport = BluetoothTransport(addr.upper())
|
|
else:
|
|
transport = SerialTransport(port=addr or "auto")
|
|
self._printer = PrinterClient(transport)
|
|
return self._printer
|
|
|
|
def _disconnect(self):
|
|
self._printer = None
|
|
|
|
def print_label(self):
|
|
try:
|
|
image = self.design.render()[0].convert("1")
|
|
image, density = prepare_print(
|
|
self.model.get(), image, self.density.get(), rotate=90
|
|
)
|
|
except (ValueError, tk.TclError) as exc:
|
|
messagebox.showerror("Cannot print", str(exc))
|
|
return
|
|
copies = max(1, self.copies.get())
|
|
self.print_btn.configure(state="disabled")
|
|
self.status.set("Connecting…")
|
|
self._save_settings()
|
|
|
|
def work():
|
|
try:
|
|
printer = self._connect()
|
|
for i in range(copies):
|
|
self.after(0, self.status.set, f"Printing {i + 1}/{copies}…")
|
|
printer.print_image(image, density=density, model=self.model.get())
|
|
self.after(0, self._print_done, None)
|
|
except Exception as exc: # noqa: BLE001 — surface everything to the UI
|
|
self._disconnect()
|
|
self.after(0, self._print_done, exc)
|
|
|
|
threading.Thread(target=work, daemon=True).start()
|
|
|
|
def _print_done(self, exc):
|
|
self.print_btn.configure(state="normal")
|
|
if exc is None:
|
|
self.status.set("Printed")
|
|
else:
|
|
self.status.set("Print failed")
|
|
is_prn = isinstance(exc, PrinterError)
|
|
kind = "Printer error" if is_prn else type(exc).__name__
|
|
messagebox.showerror(kind, str(exc) or repr(exc))
|
|
|
|
# ---- settings
|
|
|
|
def _load_settings(self) -> dict:
|
|
try:
|
|
return json.loads(SETTINGS_PATH.read_text())
|
|
except (OSError, ValueError):
|
|
return {}
|
|
|
|
def _save_settings(self):
|
|
data = {
|
|
"model": self.model.get(),
|
|
"conn": self.conn.get(),
|
|
"addr": self.addr.get(),
|
|
"density": self.density.get(),
|
|
"design": self.design.to_dict(),
|
|
}
|
|
try:
|
|
SETTINGS_PATH.parent.mkdir(parents=True, exist_ok=True)
|
|
SETTINGS_PATH.write_text(json.dumps(data, indent=2))
|
|
except (OSError, tk.TclError):
|
|
pass
|
|
|
|
def _on_close(self):
|
|
self._save_settings()
|
|
self.destroy()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
LabelApp().mainloop()
|