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purchase_order_dialog.py

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+"""
+采购单生成模块 - 处理采购单的生成和导出
+"""
+
+from datetime import datetime
+from PyQt5.QtWidgets import (
+    QDialog, QVBoxLayout, QHBoxLayout, QLabel, QPushButton, 
+    QTextEdit, QMessageBox, QFileDialog, QApplication
+)
+from PyQt5.QtGui import QFont
+from database import get_db_connection
+
+
+class PurchaseOrderDialog(QDialog):
+    """采购单生成对话框"""
+    
+    def __init__(self, db_path, style_number, quantity, loss_rate):
+        super().__init__()
+        self.db_path = db_path
+        self.style_number = style_number
+        self.quantity = quantity
+        self.loss_rate = loss_rate
+        self.setWindowTitle(f"生成采购单 - {style_number}")
+        self.resize(900, 700)
+        
+        self.setup_ui()
+        self.generate_po_text()
+
+    def setup_ui(self):
+        """设置用户界面"""
+        layout = QVBoxLayout(self)
+
+        # 信息标签
+        info_label = QLabel(
+            f"<b>款号：</b>{self.style_number}<br>"
+            f"<b>生产件数：</b>{self.quantity} 件<br>"
+            f"<b>损耗率：</b>{self.loss_rate*100:.1f}%"
+        )
+        info_label.setStyleSheet("font-size: 14px; padding: 10px; background-color: #e8f5e9; border-radius: 8px;")
+        layout.addWidget(info_label)
+
+        # 采购单内容显示
+        self.po_text = QTextEdit()
+        self.po_text.setReadOnly(True)
+        self.po_text.setFont(QFont("Microsoft YaHei", 12))
+        layout.addWidget(self.po_text)
+
+        # 按钮区域
+        btn_layout = QHBoxLayout()
+
+        copy_btn = QPushButton("复制到剪贴板")
+        copy_btn.clicked.connect(self.copy_to_clipboard)
+        copy_btn.setStyleSheet("background-color: #2196f3; color: white; padding: 10px; font-weight: bold;")
+        btn_layout.addWidget(copy_btn)
+
+        save_btn = QPushButton("保存为TXT文件")
+        save_btn.clicked.connect(self.save_to_file)
+        save_btn.setStyleSheet("background-color: #ff9800; color: white; padding: 10px; font-weight: bold;")
+        btn_layout.addWidget(save_btn)
+
+        layout.addLayout(btn_layout)
+
+    def get_conn(self):
+        """获取数据库连接"""
+        return get_db_connection(self.db_path)
+
+    def generate_po_text(self):
+        """生成采购单文本"""
+        text = f"【采购单】\n"
+        text += f"款号：{self.style_number}\n"
+        text += f"生产数量：{self.quantity} 件\n"
+        text += f"损耗率：{self.loss_rate*100:.1f}%\n"
+        text += f"生成日期：{datetime.now().strftime('%Y-%m-%d %H:%M')}\n"
+        text += "="*50 + "\n\n"
+
+        try:
+            with self.get_conn() as conn:
+                cursor = conn.execute('''
+                    SELECT category, fabric_type, usage_per_piece, unit
+                    FROM garment_materials
+                    WHERE style_number = ? AND usage_per_piece > 0
+                    ORDER BY id
+                ''', (self.style_number,))
+                rows = cursor.fetchall()
+
+                for category, fabric_type, usage_per_piece, unit in rows:
+                    total_usage = usage_per_piece * self.quantity * (1 + self.loss_rate)
+                    # 显示材料名称（如果有类型则显示类目-类型，否则只显示类目）
+                    material_name = f"{category}-{fabric_type}" if fabric_type else category
+                    text += f"材料：{material_name}\n"
+                    text += f"  单件用量：{usage_per_piece:.3f} {unit}\n"
+                    text += f"  总需采购：{total_usage:.3f} {unit}\n\n"
+
+                if not rows:
+                    text += "该款号暂无材料用量记录。\n"
+
+        except Exception as e:
+            text += f"加载失败：{str(e)}"
+
+        self.po_text.setPlainText(text)
+
+    def copy_to_clipboard(self):
+        """复制到剪贴板"""
+        QApplication.clipboard().setText(self.po_text.toPlainText())
+        QMessageBox.information(self, "成功", "采购单内容已复制到剪贴板！")
+
+    def save_to_file(self):
+        """保存为文件"""
+        default_name = f"采购单_{self.style_number}_{self.quantity}件_{datetime.now().strftime('%Y%m%d')}.txt"
+        file_path, _ = QFileDialog.getSaveFileName(self, "保存采购单", default_name, "Text Files (*.txt)")
+        if file_path:
+            try:
+                with open(file_path, "w", encoding="utf-8") as f:
+                    f.write(self.po_text.toPlainText())
+                QMessageBox.information(self, "成功", f"采购单已保存至：\n{file_path}")
+            except Exception as e:
+                QMessageBox.critical(self, "错误", "保存失败: " + str(e))