ee0b4187d7
When content overflows in the Production ID text input, the scrollbar now automatically appears. When content fits within the visible area, the scrollbar is hidden. - Changed layout from pack to grid for dynamic scrollbar control - Added yview-based overflow detection (last < 1.0 indicates overflow) - Added debounce mechanism to prevent excessive checks - Bound events: KeyRelease, ButtonRelease, Configure, Paste Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
148 lines
5.2 KiB
Python
148 lines
5.2 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Production ID 输入控件
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多行文本输入框，用于输入 Production ID 列表。
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支持内容溢出时自动显示滚动条。
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"""
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import tkinter as tk
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from tkinter import ttk, font
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class ProductionIdInput(ttk.Frame):
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"""Production ID 输入控件"""
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def __init__(self, parent, placeholder="每行输入一个 Production ID", **kwargs):
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super().__init__(parent, **kwargs)
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self.placeholder = placeholder
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self._scrollbar_visible = False
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self._check_pending = False
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# 创建文本框
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self.text_widget = tk.Text(self, wrap=tk.WORD, padx=5, pady=5)
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# 创建滚动条
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self.scrollbar = ttk.Scrollbar(self, orient=tk.VERTICAL, command=self.text_widget.yview)
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self.text_widget.configure(yscrollcommand=self._on_scroll)
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# 布局 - 使用 grid 以便动态显示/隐藏滚动条
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self.text_widget.grid(row=0, column=0, sticky="nsew")
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self.scrollbar.grid(row=0, column=1, sticky="ns")
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# 配置行列权重
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self.grid_rowconfigure(0, weight=1)
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self.grid_columnconfigure(0, weight=1)
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# 绑定事件
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self.text_widget.bind("<FocusIn>", self._on_focus_in)
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self.text_widget.bind("<FocusOut>", self._on_focus_out)
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# 监听内容变化事件
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self.text_widget.bind("<KeyRelease>", self._schedule_check)
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self.text_widget.bind("<ButtonRelease-1>", self._schedule_check)
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self.text_widget.bind("<ButtonRelease-3>", self._schedule_check)
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self.text_widget.bind("<Configure>", self._schedule_check)
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# 绑定粘贴事件
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self.text_widget.bind("<<Paste>>", self._schedule_check)
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# 初始隐藏滚动条
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self.scrollbar.grid_remove()
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# 显示占位符
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self._show_placeholder()
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# 延迟检查初始状态
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self.after(100, self._check_scrollbar_needed)
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def _on_focus_in(self, event):
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"""获得焦点时隐藏占位符"""
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if self.text_widget.get("1.0", "end-1c") == self.placeholder:
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self.text_widget.delete("1.0", tk.END)
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def _on_focus_out(self, event):
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"""失去焦点时显示占位符"""
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content = self.text_widget.get("1.0", "end-1c")
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if not content:
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self._show_placeholder()
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def _show_placeholder(self):
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"""显示占位符"""
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self.text_widget.delete("1.0", tk.END)
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self.text_widget.insert("1.0", self.placeholder)
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self.text_widget.configure(foreground="gray")
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def _hide_placeholder(self):
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"""隐藏占位符"""
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if self.text_widget.get("1.0", "end-1c") == self.placeholder:
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self.text_widget.delete("1.0", tk.END)
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self.text_widget.configure(foreground="black")
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def get(self) -> list[str]:
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"""获取 Production ID 列表"""
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self._hide_placeholder()
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content = self.text_widget.get("1.0", "end-1c").strip()
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return [line.strip() for line in content.split("\n") if line.strip()]
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def set(self, production_ids: list[str]):
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"""设置 Production ID 列表"""
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self.text_widget.delete("1.0", tk.END)
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if production_ids:
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self.text_widget.insert("1.0", "\n".join(production_ids))
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self.text_widget.configure(foreground="black")
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else:
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self._show_placeholder()
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self._schedule_check()
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def clear(self):
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"""清空内容"""
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self.text_widget.delete("1.0", tk.END)
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self._show_placeholder()
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self._schedule_check()
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def append(self, production_ids: list[str]):
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"""追加 Production ID 列表"""
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self._hide_placeholder()
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if production_ids:
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current_content = self.text_widget.get("1.0", "end-1c")
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if current_content.strip():
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self.text_widget.insert(tk.END, "\n" + "\n".join(production_ids))
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else:
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self.text_widget.insert("1.0", "\n".join(production_ids))
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self._schedule_check()
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def apply_font(self, font_family: str, font_size: int):
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"""应用字体设置"""
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font_spec = font.Font(family=font_family, size=font_size)
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self.text_widget.configure(font=font_spec)
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def _on_scroll(self, first, last):
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"""滚动回调，更新滚动条位置"""
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self.scrollbar.set(first, last)
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def _schedule_check(self, event=None):
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"""调度滚动条检查（防抖）"""
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if not self._check_pending:
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self._check_pending = True
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self.after(50, self._check_scrollbar_needed)
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def _check_scrollbar_needed(self):
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"""检查是否需要显示滚动条"""
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self._check_pending = False
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# 更新界面以确保获取准确的尺寸
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self.text_widget.update_idletasks()
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# 使用 yview() 返回值判断
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first, last = self.text_widget.yview()
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# last < 1.0 表示内容超出了可见区域（需要滚动条）
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needs_scrollbar = last < 1.0
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if needs_scrollbar != self._scrollbar_visible:
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if needs_scrollbar:
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self.scrollbar.grid()
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self._scrollbar_visible = True
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else:
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self.scrollbar.grid_remove()
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self._scrollbar_visible = False
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