from PyQt6.QtWidgets import (QWidget, QVBoxLayout, QHBoxLayout, QPushButton, QFileDialog, QGroupBox, QTableWidget, QAbstractItemView, QHeaderView, QTableWidgetItem, QProgressBar, QLabel) from PyQt6.QtCore import pyqtSignal, QDateTime, Qt class FileReceiveWidget(QWidget): """ 专门用于文件接收的UI (带进度条和速率显示) """ # 信号: (bool) enable_reception_changed = pyqtSignal(bool) def __init__(self, parent = None): super().__init__(parent) self.is_enabled = False self.received_files = [] # 存储 (filename, timestamp, file_data) self.init_ui() def init_ui(self): group = QGroupBox("接收文件") layout = QVBoxLayout(group) # --- 启用/禁用 切换按钮 --- self.btn_toggle_receive = QPushButton("启用文件接收") self.btn_toggle_receive.setCheckable(True) self.btn_toggle_receive.toggled.connect(self.on_toggle_receive) layout.addWidget(self.btn_toggle_receive) # === 进度区域（保持不变）=== self.progress_group = QGroupBox("接收进度") self.progress_group.setVisible(False) progress_layout = QVBoxLayout(self.progress_group) progress_layout.setSpacing(8) progress_layout.setContentsMargins(10, 10, 10, 10) self.lbl_current_file = QLabel("等待接收...") self.lbl_current_file.setStyleSheet("font-weight: bold; color: #333;") progress_layout.addWidget(self.lbl_current_file) self.progress_bar = QProgressBar() self.progress_bar.setMinimum(0) self.progress_bar.setMaximum(100) self.progress_bar.setValue(0) self.progress_bar.setTextVisible(True) self.progress_bar.setFormat("%p%") progress_layout.addWidget(self.progress_bar) info_layout = QHBoxLayout() self.lbl_progress_info = QLabel("等待数据...") self.lbl_progress_info.setStyleSheet("color: #555;") info_layout.addWidget(self.lbl_progress_info) info_layout.addStretch() self.lbl_speed = QLabel("速率: -- Mbps") self.lbl_speed.setStyleSheet("color: #0066cc; font-weight: bold;") info_layout.addWidget(self.lbl_speed) progress_layout.addLayout(info_layout) time_layout = QHBoxLayout() self.lbl_time_remaining = QLabel("预计剩余: --") self.lbl_time_remaining.setStyleSheet("color: #666;") time_layout.addWidget(self.lbl_time_remaining) time_layout.addStretch() progress_layout.addLayout(time_layout) layout.addWidget(self.progress_group) # --- 文件列表（修改部分）--- self.table_files = QTableWidget() self.table_files.setColumnCount(3) self.table_files.setHorizontalHeaderLabels(["文件名", "大小", "接收时间"]) # 简化标题 self.table_files.setSelectionBehavior(QAbstractItemView.SelectionBehavior.SelectRows) self.table_files.setEditTriggers(QAbstractItemView.EditTrigger.NoEditTriggers) # 🔥 关键修改：设置列宽 # 文件名：自动拉伸填充剩余空间 self.table_files.horizontalHeader().setSectionResizeMode(0, QHeaderView.ResizeMode.Stretch) # 大小：固定宽度 100 像素（足够显示数字） self.table_files.horizontalHeader().setSectionResizeMode(1, QHeaderView.ResizeMode.Fixed) self.table_files.setColumnWidth(1, 100) # 接收时间：固定宽度 160 像素（显示完整时间戳） self.table_files.horizontalHeader().setSectionResizeMode(2, QHeaderView.ResizeMode.Fixed) self.table_files.setColumnWidth(2, 160) layout.addWidget(self.table_files) # --- 保存按钮（保持不变）--- self.btn_save = QPushButton("保存选中的文件") self.btn_save.setEnabled(False) self.btn_save.setMinimumHeight(35) layout.addWidget(self.btn_save) # 设置主布局 main_layout = QVBoxLayout(self) main_layout.addWidget(group) # 连接信号 self.table_files.itemSelectionChanged.connect( lambda: self.btn_save.setEnabled(len(self.table_files.selectedItems()) > 0) ) self.btn_save.clicked.connect(self.save_selected_file) self.set_enabled(False) def on_toggle_receive(self, checked): if checked: self.btn_toggle_receive.setText("文件接收中 (点击停止)") self.enable_reception_changed.emit(True) else: self.btn_toggle_receive.setText("启用文件接收") self.enable_reception_changed.emit(False) self.reset_progress() def add_received_file(self, filename, file_data): """[公共槽] 由 MainWindow 连接到 Worker 的信号""" timestamp = QDateTime.currentDateTime() file_size = len(file_data) # 1. 存储数据 self.received_files.append((filename, timestamp, file_data)) # 2. 更新表格 row = self.table_files.rowCount() self.table_files.insertRow(row) self.table_files.setItem(row, 0, QTableWidgetItem(filename)) self.table_files.setItem(row, 1, QTableWidgetItem(str(file_size))) self.table_files.setItem(row, 2, QTableWidgetItem(timestamp.toString("yyyy-MM-dd hh:mm:ss"))) self.table_files.scrollToBottom() def save_selected_file(self): selected_rows = self.table_files.selectionModel().selectedRows() if not selected_rows: return row_index = selected_rows[0].row() if row_index >= len(self.received_files): return filename, timestamp, file_data = self.received_files[row_index] save_path, _ = QFileDialog.getSaveFileName(self, "保存文件", filename, "所有文件 (*)") if save_path: try: with open(save_path, 'wb') as f: f.write(file_data) except Exception as e: print(f"File save error: {e}") def set_enabled(self, enabled): """由主窗口调用,在连接后启用""" self.is_enabled = enabled self.btn_toggle_receive.setEnabled(enabled) self.btn_save.setEnabled(enabled and len(self.table_files.selectedItems()) > 0) self.table_files.setEnabled(enabled) if not enabled: self.btn_toggle_receive.setChecked(False) self.reset_progress() # === 新增: 进度控制方法 === def start_receiving(self, filename, total_size): """开始接收文件时调用""" self.progress_group.setVisible(True) self.lbl_current_file.setText(f"正在接收: {filename}") self.progress_bar.setValue(0) size_str = self.format_file_size(total_size) self.lbl_progress_info.setText(f"0 B / {size_str}") self.lbl_speed.setText("速率: -- Mbps") self.lbl_time_remaining.setText("预计剩余: 计算中...") def update_progress(self, received_bytes, total_bytes, speed_mbps): """ 更新接收进度 :param received_bytes: 已接收字节数 :param total_bytes: 总字节数 :param speed_mbps: 实时速率 (Mbps) """ if total_bytes == 0: return # 更新进度条 progress = int((received_bytes / total_bytes) * 100) self.progress_bar.setValue(progress) # 更新已接收信息 recv_str = self.format_file_size(received_bytes) total_str = self.format_file_size(total_bytes) self.lbl_progress_info.setText(f"{recv_str} / {total_str}") # 更新速率 (显示为 Mbps) self.lbl_speed.setText(f"速率: {speed_mbps:.2f} Mbps") # 计算预计剩余时间 if speed_mbps > 0: remaining_bytes = total_bytes - received_bytes remaining_bits = remaining_bytes * 8 remaining_seconds = remaining_bits / (speed_mbps * 1_000_000) if remaining_seconds < 60: time_str = f"{remaining_seconds:.1f} 秒" elif remaining_seconds < 3600: time_str = f"{remaining_seconds / 60:.1f} 分钟" else: time_str = f"{remaining_seconds / 3600:.1f} 小时" self.lbl_time_remaining.setText(f"预计剩余: {time_str}") else: self.lbl_time_remaining.setText("预计剩余: 计算中...") def finish_receiving(self, success = True, message = ""): """接收完成时调用""" if success: self.progress_bar.setValue(100) self.lbl_current_file.setText("接收完成!") self.lbl_current_file.setStyleSheet("font-weight: bold; color: green;") self.lbl_progress_info.setText("文件已保存到列表") self.lbl_progress_info.setStyleSheet("color: green;") self.lbl_time_remaining.setText("已完成") else: self.lbl_current_file.setText(f"接收失败: {message}") self.lbl_current_file.setStyleSheet("font-weight: bold; color: red;") self.lbl_time_remaining.setText("已中断") def reset_progress(self): """重置进度显示""" self.progress_group.setVisible(False) self.progress_bar.setValue(0) self.lbl_current_file.setText("等待接收...") self.lbl_current_file.setStyleSheet("font-weight: bold; color: #333;") self.lbl_progress_info.setText("等待数据...") self.lbl_progress_info.setStyleSheet("color: #555;") self.lbl_speed.setText("速率: -- Mbps") self.lbl_time_remaining.setText("预计剩余: --") def format_file_size(self, size_bytes): """格式化文件大小""" for unit in ['B', 'KB', 'MB', 'GB', 'TB']: if size_bytes < 1024.0: return f"{size_bytes:.2f} {unit}" size_bytes /= 1024.0 return f"{size_bytes:.2f} PB" # === 结束新增 ===