79 lines
1.7 KiB
Python
79 lines
1.7 KiB
Python
"""
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图片加载工具
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用于从URL加载图片并转换为PIL/CTkImage格式
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"""
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import io
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import requests
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from PIL import Image
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from typing import Optional
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import customtkinter as ctk
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def load_image_from_url(
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url: str,
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size: tuple = (150, 150),
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timeout: int = 10
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) -> Optional[ctk.CTkImage]:
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"""
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从URL加载图片
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Args:
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url: 图片URL
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size: 目标尺寸 (width, height)
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timeout: 超时时间（秒）
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Returns:
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CTkImage对象，失败返回None
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"""
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try:
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# 下载图片
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response = requests.get(url, timeout=timeout)
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response.raise_for_status()
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# 转换为PIL Image
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image_data = io.BytesIO(response.content)
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pil_image = Image.open(image_data)
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# 转换为RGB（防止RGBA等格式问题）
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if pil_image.mode != 'RGB':
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pil_image = pil_image.convert('RGB')
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# 创建CTkImage
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ctk_image = ctk.CTkImage(
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light_image=pil_image,
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dark_image=pil_image,
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size=size
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)
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return ctk_image
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except Exception as e:
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print(f"加载图片失败 {url}: {e}")
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return None
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def create_placeholder_image(
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size: tuple = (150, 150),
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text: str = "加载失败"
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) -> ctk.CTkImage:
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"""
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创建占位图片
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Args:
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size: 图片尺寸
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text: 显示文字
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Returns:
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CTkImage对象
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"""
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# 创建灰色背景图片
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pil_image = Image.new('RGB', size, color=(200, 200, 200))
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ctk_image = ctk.CTkImage(
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light_image=pil_image,
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dark_image=pil_image,
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size=size
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)
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return ctk_image
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