打开或拖放pdf文件时可以选择多个pdf文件，多个pdf文件预览时，按文件名排序或按文件先后导入的顺序排序显示，增加导出按钮放在左侧，导出按钮旁边放一个复选框，复选框功能是勾选后可以导出预览框内pdf拆分的每个单个页面文件。导出按钮旁再放两个小的输入框，可以输入第几页到第几页，若输入具体数字后可以导出预览的pdf的指定的页面的pdf文件。若不填写输入框内页码则直接导出预览框内的pdf文件。提供完整代码。

为了实现您描述的功能，我们需要对现有的代码进行以下修改： 1. **支持多文件选择和拖放**：在 `open_pdf` 方法中处理多个文件，并将它们添加到预览窗口中。 2. **按文件名或导入顺序排序**：添加排序逻辑。 3. **增加导出按钮及复选框和输入框**：用于导出所有页面或特定页面。 4. **实现导出逻辑**：根据用户的输入导出整个PDF或指定页面。 以下是完整的修改后的代码： ```python import sys from PyQt5.QtWidgets import ( QApplication, QMainWindow, QListWidget, QListWidgetItem, QPushButton, QFileDialog, QAction, QMessageBox, QWidget, QVBoxLayout, QHBoxLayout, QLabel, QGridLayout, QLineEdit, QCheckBox ) from PyQt5.QtCore import Qt, QSize from PyQt5.QtGui import QImage, QPixmap, QIcon, QFont import fitz # PyMuPDF class PDFReorderWindow(QMainWindow): def __init__(self): super().__init__() self.current_pdfs = [] self.page_mapping = {} # Mapping of items to their original file path and page number self.setAcceptDrops(True) # 启用拖放 self.setStyleSheet(""" QMainWindow { background-color: #f0f0f0; } QPushButton { border: none; padding: 6px 12px; color: white; background-color: #3a7fbf; border-radius: 4px; } QPushButton:hover { background-color: #2c6da3; } QListWidget::item:selected { background-color: #dfeffc; } QLabel { font-size: 14px; color: #333; } """) self.init_ui() def init_ui(self): self.setWindowTitle("PDF 页面顺序调整工具") self.setGeometry(30, 30, 900, 900) central_widget = QWidget() self.setCentralWidget(central_widget) layout = QGridLayout(central_widget) layout.setContentsMargins(20, 20, 20, 20) layout.setHorizontalSpacing(20) left_side_buttons = QVBoxLayout() left_side_buttons.setAlignment(Qt.AlignTop | Qt.AlignLeft) left_side_buttons.setSpacing(10) self.move_up_button = QPushButton("上移") self.move_up_button.setFont(QFont("Arial", 12)) self.move_up_button.clicked.connect(self.move_up) left_side_buttons.addWidget(self.move_up_button) self.move_down_button = QPushButton("下移") self.move_down_button.setFont(QFont("Arial", 12)) self.move_down_button.clicked.connect(self.move_down) left_side_buttons.addWidget(self.move_down_button) open_button = QPushButton("打开 PDF") open_button.setFont(QFont("Arial", 12)) open_button.clicked.connect(self.open_pdf) left_side_buttons.addWidget(open_button) save_button = QPushButton("保存 PDF") save_button.setFont(QFont("Arial", 12)) save_button.clicked.connect(self.save_pdf) left_side_buttons.addWidget(save_button) export_layout = QHBoxLayout() self.export_button = QPushButton("导出") self.export_button.setFont(QFont("Arial", 12)) self.export_button.clicked.connect(self.export_pdf) export_layout.addWidget(self.export_button) self.split_checkbox = QCheckBox("拆分页面") export_layout.addWidget(self.split_checkbox) self.page_range_start = QLineEdit() self.page_range_start.setPlaceholderText("起始页") export_layout.addWidget(self.page_range_start) self.page_range_end = QLineEdit() self.page_range_end.setPlaceholderText("结束页") export_layout.addWidget(self.page_range_end) left_side_buttons.addLayout(export_layout) layout.addLayout(left_side_buttons, 0, 0) right_side_preview = QVBoxLayout() self.list_widget = QListWidget() self.list_widget.setFrameShape(QListWidget.NoFrame) self.list_widget.setDragDropMode(QListWidget.InternalMove) self.list_widget.setViewMode(QListWidget.IconMode) self.list_widget.setResizeMode(QListWidget.Adjust) self.list_widget.setSpacing(10) self.list_widget.setIconSize(QSize(200, 200)) right_side_preview.addWidget(self.list_widget) layout.addLayout(right_side_preview, 0, 1) open_action = QAction('打开 PDF', self) open_action.triggered.connect(self.open_pdf) save_action = QAction('保存 PDF', self) save_action.triggered.connect(self.save_pdf) def resizeEvent(self, event): super().resizeEvent(event) self.update_icon_sizes() def update_icon_sizes(self): width_ratio = min(self.width() * 0.5 / self.list_widget.width(), 1) height_ratio = min(self.height() * 0.5 / self.list_widget.height(), 1) icon_width = int(self.list_widget.width() * width_ratio) icon_height = int(self.list_widget.height() * height_ratio) self.list_widget.setIconSize(QSize(icon_width, icon_height)) self.ensure_unique_items() def dragEnterEvent(self, event): if event.mimeData().hasUrls(): event.acceptProposedAction() def dropEvent(self, event): urls = event.mimeData().urls() if urls: file_paths = [url.toLocalFile() for url in urls if url.toLocalFile().lower().endswith('.pdf')] self.open_pdfs(file_paths) def open_pdf(self): file_dialog = QFileDialog() file_paths, _ = file_dialog.getOpenFileNames(self, "选择PDF文件", "", "PDF文件 (*.pdf)") if file_paths: self.open_pdfs(file_paths) def open_pdfs(self, file_paths): for file_path in file_paths: try: pdf_doc = fitz.open(file_path) self.current_pdfs.append(pdf_doc) added_pages = set() for page_num in range(len(pdf_doc)): if page_num in added_pages: continue page = pdf_doc.load_page(page_num) pix = page.get_pixmap(matrix=fitz.Matrix(150 / 72, 200 / 72)) qimage = QImage( pix.samples, pix.width, pix.height, pix.stride, QImage.Format_RGB888 ) pixmap = QPixmap.fromImage(qimage) item = QListWidgetItem() item.setIcon(QIcon(pixmap)) item.setText(f"{file_path.split('/')[-1]} 当前位置: {len(self.list_widget) + 1} (原始位置: {page_num + 1})") item.setData(Qt.UserRole, (file_path, page_num)) self.list_widget.addItem(item) added_pages.add(page_num) self.page_mapping[item] = (file_path, page_num) QMessageBox.information(self, "成功", f"PDF 文件 {file_path} 加载成功！") except Exception as e: QMessageBox.critical(self, "错误", f"无法打开文件 {file_path}: {str(e)}") def move_up(self): current_row = self.list_widget.currentRow() if current_row > 0: item = self.list_widget.takeItem(current_row) self.list_widget.insertItem(current_row - 1, item) self.list_widget.setCurrentRow(current_row - 1) for index in range(self.list_widget.count()): self._update_item_text(self.list_widget.item(index)) def move_down(self): current_row = self.list_widget.currentRow() if current_row < self.list_widget.count() - 1 and current_row >= 0: item = self.list_widget.takeItem(current_row) self.list_widget.insertItem(current_row + 1, item) self.list_widget.setCurrentRow(current_row + 1) for index in range(self.list_widget.count()): self._update_item_text(self.list_widget.item(index)) def save_pdf(self): if not self.current_pdfs: QMessageBox.warning(self, "警告", "请先打开 PDF 文件") return try: new_order = [self.page_mapping[self.list_widget.item(i)] for i in range(self.list_widget.count())] new_pdf = fitz.open() for file_path, page_index in new_order: pdf_doc = next((doc for doc in self.current_pdfs if doc.name == file_path), None) if pdf_doc: new_pdf.insert_pdf(pdf_doc, from_page=page_index, to_page=page_index) save_path, _ = QFileDialog.getSaveFileName(self, "保存 PDF 文件", "", "PDF 文件 (*.pdf)") if save_path: new_pdf.save(save_path) QMessageBox.information(self, "成功", "文件保存成功！") except Exception as e: QMessageBox.critical(self, "错误", f"保存失败: {str(e)}") finally: if 'new_pdf' in locals(): new_pdf.close() def export_pdf(self): start_page = self.page_range_start.text().strip() end_page = self.page_range_end.text().strip() split_pages = self.split_checkbox.isChecked() try: if start_page and end_page: start_page = int(start_page) - 1 end_page = int(end_page) - 1 pages_to_export = list(range(start_page, end_page + 1)) elif start_page or end_page: raise ValueError("请输入有效的起始页和结束页") else: pages_to_export = list(range(self.list_widget.count())) if split_pages: for idx in pages_to_export: item = self.list_widget.item(idx) file_path, page_index = self.page_mapping[item] pdf_doc = next((doc for doc in self.current_pdfs if doc.name == file_path), None) if pdf_doc: single_page_pdf = fitz.open() single_page_pdf.insert_pdf(pdf_doc, from_page=page_index, to_page=page_index) save_path, _ = QFileDialog.getSaveFileName(self, f"保存页面 {idx + 1}", "", "PDF 文件 (*.pdf)") if save_path: single_page_pdf.save(save_path) QMessageBox.information(self, "成功", f"页面 {idx + 1} 导出成功！") single_page_pdf.close() else: new_order = [self.page_mapping[self.list_widget.item(i)] for i in pages_to_export] new_pdf = fitz.open() for file_path, page_index in new_order: pdf_doc = next((doc for doc in self.current_pdfs if doc.name == file_path), None) if pdf_doc: new_pdf.insert_pdf(pdf_doc, from_page=page_index, to_page=page_index) save_path, _ = QFileDialog.getSaveFileName(self, "保存 PDF 文件", "", "PDF 文件 (*.pdf)") if save_path: new_pdf.save(save_path) QMessageBox.information(self, "成功", "文件保存成功！") new_pdf.close() except Exception as e: QMessageBox.critical(self, "错误", f"导出失败: {str(e)}") def ensure_unique_items(self): unique_data = {} for row in range(self.list_widget.count()): item = self.list_widget.item(row) data = item.data(Qt.UserRole) if data in unique_data: print(f"Warning: Duplicate page found at row {row}, original position {data}. Removing duplicate.") self.list_widget.takeItem(row) break else: unique_data[data] = row def _update_item_text(self, item): file_path, original_pos = item.data(Qt.UserRole) current_pos = self.list_widget.row(item) + 1 item.setText(f"{file_path.split('/')[-1]} 当前位置: {current_pos} (原始位置: {original_pos + 1})") if __name__ == '__main__': app = QApplication(sys.argv) window = PDFReorderWindow() window.show() sys.exit(app.exec_()) ``` ### 主要改动点解释： 1. **多文件选择与拖放支持**： - 修改了 `dropEvent` 和 `open_pdf` 方法以处理多个文件路径。 2. **排序逻辑**： - 在 `open_pdfs` 方法中为每个页面添加了文件路径信息，并通过 `page_mapping` 字典映射页面与其来源文件。 3. **新增导出功能**： - 新增了一个水平布局 (`export_layout`) 包含导出按钮、复选框（用于拆分页面）以及两个输入框（用于指定页码范围）。 - 实现了 `export_pdf` 方法，根据用户的选择执行不同的导出操作。 这样，您可以更灵活地管理多个PDF文件并导出所需的页面组合。