如何使用Python现有包制作按键可独立上色的键盘图形

方案1：基于keyboardlayout包修改 #

keyboardlayout底层依赖Pillow绘图，我们可以通过重写Key类的绘制逻辑来支持自定义按键颜色，步骤如下：

1. 安装依赖

pip install keyboardlayout pillow

2. 自定义带颜色支持的按键并渲染

from keyboardlayout import Layout, Key
from PIL import ImageDraw, Image

# 定义按键-颜色映射（键名对应RGB颜色值）
key_colors = {
    "Q": (255, 0, 0),
    "W": (0, 255, 0),
    "E": (0, 0, 255),
    "A": (255, 255, 0),
    "S": (255, 0, 255),
    "D": (0, 255, 255),
    # 可继续添加其他按键的颜色
}

# 重写Key类，新增颜色参数并修改绘制逻辑
class ColoredKey(Key):
    def __init__(self, *args, color=(200, 200, 200), **kwargs):
        super().__init__(*args, **kwargs)
        self.color = color

    def draw(self, draw: ImageDraw.ImageDraw) -> None:
        # 绘制按键背景（用自定义颜色）
        draw.rectangle(self.rect, fill=self.color, outline=(0,0,0), width=2)
        # 绘制按键文本
        draw.text(self.center, self.label, fill=(0,0,0), font=self.font, anchor="mm")

# 创建布局时指定自定义Key类
layout = Layout(
    layout_name="ansi",  # 可选布局：ansi, iso, etc.
    key_class=ColoredKey,
    key_size=(60, 60),   # 调整按键大小
    key_spacing=(5, 5)   # 调整按键间距
)

# 为每个按键分配颜色（未指定的用默认灰色）
for key in layout.keys:
    key.color = key_colors.get(key.label, (200, 200, 200))

# 渲染并保存图像
img = layout.render()
img.save("colored_keyboard.png")
img.show()

方案2：用Pillow完全自定义绘制 #

如果需要更灵活的布局控制，直接用Pillow手动绘制键盘，无需依赖keyboardlayout：

from PIL import Image, ImageDraw, ImageFont

# 键盘基础参数
key_width = 60
key_height = 60
spacing = 5
margin = 20

# 定义键盘布局（可按需修改）
keyboard_layout = [
    ["Esc", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "F10", "F11", "F12"],
    ["~", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "=", "Backspace"],
    ["Tab", "Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P", "[", "]", "\\"],
    ["Caps", "A", "S", "D", "F", "G", "H", "J", "K", "L", ";", "'", "Enter"],
    ["Shift", "Z", "X", "C", "V", "B", "N", "M", ",", ".", "/", "Shift"],
    ["Ctrl", "Win", "Alt", "Space", "Alt", "Win", "Menu", "Ctrl"]
]

# 按键颜色映射
key_colors = {
    "Q": (255, 0, 0), "W": (0, 255, 0), "E": (0, 0, 255),
    "A": (255, 255, 0), "S": (255, 0, 255), "D": (0, 255, 255)
}

# 计算图像尺寸
max_cols = max(len(row) for row in keyboard_layout)
img_width = margin * 2 + max_cols * key_width + (max_cols - 1) * spacing
img_height = margin * 2 + len(keyboard_layout) * key_height + (len(keyboard_layout) - 1) * spacing

# 创建空白图像
img = Image.new("RGB", (img_width, img_height), (255, 255, 255))
draw = ImageDraw.Draw(img)
# 替换为你系统中存在的字体路径
font = ImageFont.truetype("arial.ttf", 20)

# 遍历绘制每个按键
y = margin
for row in keyboard_layout:
    x = margin
    for key_label in row:
        # 计算按键矩形区域
        rect = (x, y, x + key_width, y + key_height)
        # 获取颜色（默认灰色）
        color = key_colors.get(key_label, (200, 200, 200))
        # 绘制按键背景
        draw.rectangle(rect, fill=color, outline=(0,0,0), width=2)
        # 绘制居中按键文本
        text_bbox = draw.textbbox((0,0), key_label, font=font)
        text_x = x + (key_width - (text_bbox[2]-text_bbox[0])) // 2
        text_y = y + (key_height - (text_bbox[3]-text_bbox[1])) // 2
        draw.text((text_x, text_y), key_label, fill=(0,0,0), font=font)
        # 更新x坐标
        x += key_width + spacing
    # 更新y坐标
    y += key_height + spacing

# 保存并显示图像
img.save("custom_colored_keyboard.png")
img.show()

内容的提问来源于stack exchange，提问作者ranlot