674 lines
25 KiB
Python
674 lines
25 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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SQLite数据库查看器 - 基于PySide6
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功能：打开product目录下的product.db的sqlite文件，显示表和数据的界面
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"""
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import sys
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import os
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import sqlite3
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from loguru import logger
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from PySide6.QtWidgets import (QApplication, QMainWindow, QVBoxLayout, QHBoxLayout,
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QWidget, QPushButton, QTableWidget, QTableWidgetItem,
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QListWidget, QListWidgetItem, QSplitter, QFileDialog,
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QLabel, QStatusBar, QMessageBox, QHeaderView, QComboBox,
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QLineEdit, QGroupBox, QTextEdit, QStyledItemDelegate, QMenu)
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from PySide6.QtCore import Qt, QSize
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from PySide6.QtGui import QAction, QFontMetrics
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class MultiLineDelegate(QStyledItemDelegate):
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"""多行文本委托，支持自动调整行高"""
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def __init__(self, parent=None):
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super().__init__(parent)
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self.min_height = 30 # 最小行高
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self.max_height = 200 # 最大行高
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def paint(self, painter, option, index):
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"""自定义绘制，支持多行文本"""
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# 保存原始选项
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opt = option
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# 获取文本内容
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text = index.data(Qt.DisplayRole)
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if text is None:
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text = ""
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# 设置文本换行
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text = str(text)
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# 计算文本高度
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metrics = QFontMetrics(option.font)
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rect = option.rect
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# 计算需要的行数
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lines = text.count('\n') + 1
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line_height = metrics.lineSpacing()
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text_height = lines * line_height + 10 # 添加一些边距
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# 限制高度在最小和最大值之间
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if text_height < self.min_height:
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text_height = self.min_height
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elif text_height > self.max_height:
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text_height = self.max_height
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# 调整绘制区域高度
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opt.rect.setHeight(text_height)
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# 调用父类绘制方法
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super().paint(painter, opt, index)
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def sizeHint(self, option, index):
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"""返回建议的单元格大小"""
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# 获取文本内容
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text = index.data(Qt.DisplayRole)
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if text is None:
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text = ""
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text = str(text)
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# 计算文本尺寸
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metrics = QFontMetrics(option.font)
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# 计算行数
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lines = text.count('\n') + 1
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line_height = metrics.lineSpacing()
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text_height = lines * line_height + 10 # 添加边距
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# 计算文本宽度（考虑换行）
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if '\n' in text:
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# 多行文本，计算最长行的宽度
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max_width = 0
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for line in text.split('\n'):
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line_width = metrics.horizontalAdvance(line) + 20
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max_width = max(max_width, line_width)
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else:
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# 单行文本
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max_width = metrics.horizontalAdvance(text) + 20
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# 限制高度
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if text_height < self.min_height:
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text_height = self.min_height
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elif text_height > self.max_height:
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text_height = self.max_height
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# 最小宽度设置为100像素
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max_width = max(max_width, 100)
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return QSize(max_width, text_height)
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class SQLiteViewer(QMainWindow):
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"""SQLite数据库查看器主窗口"""
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def __init__(self):
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super().__init__()
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logger.info("初始化SQLite数据库查看器")
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self.db_connection = None
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self.current_table = None
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self.init_ui()
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def init_ui(self):
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"""初始化用户界面"""
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logger.info("设置主窗口界面")
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self.setWindowTitle("SQLite数据库查看器")
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self.setGeometry(100, 100, 1200, 800)
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# 创建中央部件
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central_widget = QWidget()
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self.setCentralWidget(central_widget)
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# 创建主布局
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main_layout = QVBoxLayout(central_widget)
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# 创建顶部按钮布局
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self.create_top_buttons(main_layout)
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# 创建筛选控件区域
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self.create_filter_section(main_layout)
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# 创建分割器（左侧表列表，右侧数据表格）
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self.create_splitter(main_layout)
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# 创建状态栏
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self.create_status_bar()
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# 创建菜单栏
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self.create_menubar()
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logger.info("界面初始化完成")
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def create_top_buttons(self, layout):
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"""创建顶部按钮布局"""
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logger.info("创建顶部按钮")
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button_layout = QHBoxLayout()
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# 打开数据库按钮
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self.open_button = QPushButton("打开SQLite数据库")
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self.open_button.clicked.connect(self.open_database)
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button_layout.addWidget(self.open_button)
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# 刷新按钮
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self.refresh_button = QPushButton("刷新")
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self.refresh_button.clicked.connect(self.refresh_data)
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self.refresh_button.setEnabled(False)
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button_layout.addWidget(self.refresh_button)
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# 数据库路径显示
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self.db_path_label = QLabel("未打开数据库")
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button_layout.addWidget(self.db_path_label)
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button_layout.addStretch()
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layout.addLayout(button_layout)
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def create_filter_section(self, layout):
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"""创建筛选控件区域"""
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logger.info("创建筛选控件区域")
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# 创建筛选分组框
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filter_group = QGroupBox("数据筛选")
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filter_layout = QHBoxLayout(filter_group)
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# 字段选择标签
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filter_layout.addWidget(QLabel("筛选字段:"))
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# 字段选择下拉框
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self.field_combo = QComboBox()
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self.field_combo.setMinimumWidth(150)
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filter_layout.addWidget(self.field_combo)
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# 筛选条件标签
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filter_layout.addWidget(QLabel("筛选条件:"))
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# 筛选条件输入框
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self.filter_input = QLineEdit()
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self.filter_input.setPlaceholderText("输入筛选条件，如：<75 或 name='test' 或 created_at>'2024-01-01'")
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self.filter_input.setMinimumWidth(300)
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filter_layout.addWidget(self.filter_input)
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# 筛选按钮
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self.filter_button = QPushButton("筛选")
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self.filter_button.clicked.connect(self.apply_filter)
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filter_layout.addWidget(self.filter_button)
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# 清除筛选按钮
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self.clear_filter_button = QPushButton("清除筛选")
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self.clear_filter_button.clicked.connect(self.clear_filter)
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self.clear_filter_button.setEnabled(False)
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filter_layout.addWidget(self.clear_filter_button)
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filter_layout.addStretch()
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# 初始状态下禁用筛选控件
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self.field_combo.setEnabled(False)
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self.filter_input.setEnabled(False)
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self.filter_button.setEnabled(False)
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layout.addWidget(filter_group)
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def create_splitter(self, layout):
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"""创建分割器界面"""
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logger.info("创建分割器界面")
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splitter = QSplitter(Qt.Horizontal)
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# 左侧：表列表
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left_widget = QWidget()
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left_layout = QVBoxLayout(left_widget)
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left_layout.addWidget(QLabel("数据库表列表:"))
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self.table_list = QListWidget()
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self.table_list.itemClicked.connect(self.on_table_selected)
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left_layout.addWidget(self.table_list)
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# 右侧：数据表格
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right_widget = QWidget()
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right_layout = QVBoxLayout(right_widget)
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right_layout.addWidget(QLabel("表数据:"))
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self.data_table = QTableWidget()
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self.data_table.setAlternatingRowColors(True)
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# 设置表格支持多行内容和可调整列宽
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self.data_table.setItemDelegate(MultiLineDelegate(self.data_table))
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self.data_table.setWordWrap(True) # 启用自动换行
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self.data_table.setTextElideMode(Qt.ElideNone) # 不省略文本
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# 设置列头支持拖拽调整大小
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header = self.data_table.horizontalHeader()
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header.setSectionsMovable(True) # 允许移动列
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header.setStretchLastSection(False) # 不自动拉伸最后一列
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# 设置行头自动调整高度
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self.data_table.verticalHeader().setSectionResizeMode(QHeaderView.ResizeToContents)
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# 添加右键菜单支持
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self.data_table.setContextMenuPolicy(Qt.CustomContextMenu)
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self.data_table.customContextMenuRequested.connect(self.show_table_context_menu)
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right_layout.addWidget(self.data_table)
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splitter.addWidget(left_widget)
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splitter.addWidget(right_widget)
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splitter.setSizes([300, 900])
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layout.addWidget(splitter)
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def create_status_bar(self):
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"""创建状态栏"""
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logger.info("创建状态栏")
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self.status_bar = QStatusBar()
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self.setStatusBar(self.status_bar)
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self.status_bar.showMessage("就绪")
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def create_menubar(self):
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"""创建菜单栏"""
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logger.info("创建菜单栏")
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menubar = self.menuBar()
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# 文件菜单
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file_menu = menubar.addMenu("文件")
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open_action = QAction("打开数据库", self)
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open_action.triggered.connect(self.open_database)
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file_menu.addAction(open_action)
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exit_action = QAction("退出", self)
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exit_action.triggered.connect(self.close)
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file_menu.addAction(exit_action)
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def open_database(self):
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"""打开SQLite数据库文件"""
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logger.info("打开数据库文件对话框")
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# 默认打开product目录下的product.db
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default_path = os.path.join('product', 'product.db')
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if os.path.exists(default_path):
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file_path, _ = QFileDialog.getOpenFileName(
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self, "打开SQLite数据库", default_path, "SQLite数据库文件 (*.db *.sqlite *.sqlite3)"
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)
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else:
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file_path, _ = QFileDialog.getOpenFileName(
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self, "打开SQLite数据库", "", "SQLite数据库文件 (*.db *.sqlite *.sqlite3)"
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)
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if file_path:
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logger.info(f"打开数据库文件: {file_path}")
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self.connect_to_database(file_path)
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def connect_to_database(self, file_path):
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"""连接到指定的SQLite数据库"""
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try:
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if self.db_connection:
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self.db_connection.close()
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self.db_connection = sqlite3.connect(file_path)
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logger.info("数据库连接成功")
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self.db_path_label.setText(f"数据库: {os.path.basename(file_path)}")
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self.status_bar.showMessage(f"已连接到数据库: {os.path.basename(file_path)}")
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self.refresh_button.setEnabled(True)
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# 加载表列表
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self.load_table_list()
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except sqlite3.Error as e:
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logger.error(f"数据库连接失败: {e}")
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QMessageBox.critical(self, "错误", f"无法打开数据库: {e}")
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def load_table_list(self):
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"""加载数据库表列表"""
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if not self.db_connection:
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return
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try:
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cursor = self.db_connection.cursor()
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cursor.execute("SELECT name FROM sqlite_master WHERE type='table'")
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tables = cursor.fetchall()
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self.table_list.clear()
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for table in tables:
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item = QListWidgetItem(table[0])
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self.table_list.addItem(item)
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logger.info(f"加载了 {len(tables)} 个表")
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self.status_bar.showMessage(f"已加载 {len(tables)} 个表")
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except sqlite3.Error as e:
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logger.error(f"加载表列表失败: {e}")
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QMessageBox.critical(self, "错误", f"加载表列表失败: {e}")
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def on_table_selected(self, item):
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"""当表被选中时加载表数据和字段列表"""
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table_name = item.text()
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logger.info(f"选中表: {table_name}")
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self.current_table = table_name
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self.load_table_data(table_name)
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self.update_field_combo(table_name)
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def load_table_data(self, table_name):
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"""加载指定表的数据"""
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if not self.db_connection:
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return
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try:
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cursor = self.db_connection.cursor()
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# 获取表结构
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cursor.execute(f"PRAGMA table_info({table_name})")
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columns = cursor.fetchall()
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column_names = [col[1] for col in columns]
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# 获取数据
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cursor.execute(f"SELECT * FROM {table_name}")
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data = cursor.fetchall()
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# 设置表格
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self.data_table.setRowCount(len(data))
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self.data_table.setColumnCount(len(column_names))
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self.data_table.setHorizontalHeaderLabels(column_names)
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# 填充数据
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for row_idx, row_data in enumerate(data):
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for col_idx, cell_data in enumerate(row_data):
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# 处理None值和格式化数据
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if cell_data is None:
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display_text = ""
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elif isinstance(cell_data, (int, float)):
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# 数字类型保持原样，但转换为字符串
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display_text = str(cell_data)
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else:
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# 文本类型，保留原始格式，包括换行符
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display_text = str(cell_data)
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item = QTableWidgetItem(display_text)
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item.setToolTip(display_text) # 添加悬停提示
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self.data_table.setItem(row_idx, col_idx, item)
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# 调整列宽 - 使用Interactive模式让用户可以手动调整
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header = self.data_table.horizontalHeader()
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header.setSectionResizeMode(QHeaderView.Interactive)
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# 设置初始列宽为内容宽度，但有最大宽度限制
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for col in range(len(column_names)):
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# 计算该列内容的最大宽度
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max_width = 0
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for row in range(min(100, len(data))): # 只检查前100行，避免性能问题
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item = self.data_table.item(row, col)
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if item and item.text():
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text_width = self.data_table.fontMetrics().horizontalAdvance(item.text()) + 20
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max_width = max(max_width, text_width)
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# 设置列宽，最小100像素，最大400像素
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column_width = min(max(max_width, 100), 400)
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self.data_table.setColumnWidth(col, column_width)
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logger.info(f"加载表 {table_name} 数据完成，共 {len(data)} 行")
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self.status_bar.showMessage(f"表 {table_name}: {len(data)} 行数据")
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except sqlite3.Error as e:
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logger.error(f"加载表数据失败: {e}")
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QMessageBox.critical(self, "错误", f"加载表数据失败: {e}")
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def update_field_combo(self, table_name):
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"""更新字段选择下拉框"""
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if not self.db_connection:
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return
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try:
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cursor = self.db_connection.cursor()
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cursor.execute(f"PRAGMA table_info({table_name})")
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columns = cursor.fetchall()
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# 清空当前字段列表
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self.field_combo.clear()
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# 添加所有字段到下拉框
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for column in columns:
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field_name = column[1] # 字段名在第二个位置
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self.field_combo.addItem(field_name)
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# 启用筛选控件
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self.field_combo.setEnabled(True)
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self.filter_input.setEnabled(True)
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self.filter_button.setEnabled(True)
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logger.info(f"更新字段下拉框: {table_name}, 共 {len(columns)} 个字段")
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except sqlite3.Error as e:
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logger.error(f"获取表字段信息失败: {e}")
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QMessageBox.warning(self, "错误", f"获取表字段信息失败: {e}")
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def apply_filter(self):
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"""应用筛选条件"""
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if not self.db_connection or not self.current_table:
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return
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selected_field = self.field_combo.currentText()
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filter_condition = self.filter_input.text().strip()
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if not selected_field or not filter_condition:
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QMessageBox.warning(self, "警告", "请选择筛选字段并输入筛选条件")
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return
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try:
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cursor = self.db_connection.cursor()
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# 检查是否为数值比较（支持 <, >, <=, >=, =, != 操作符）
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import re
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numeric_pattern = r'^\s*([><]=?|!=|=)\s*([\d.]+)\s*$'
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match = re.match(numeric_pattern, filter_condition)
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if match:
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# 数值比较
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operator = match.group(1)
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value = match.group(2)
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query = f"SELECT * FROM {self.current_table} WHERE {selected_field} {operator} ?"
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filter_value = float(value)
|
||
else:
|
||
# 文本模糊匹配
|
||
query = f"SELECT * FROM {self.current_table} WHERE {selected_field} LIKE ?"
|
||
filter_value = f"%{filter_condition}%"
|
||
|
||
# 执行查询
|
||
cursor.execute(query, (filter_value,))
|
||
data = cursor.fetchall()
|
||
|
||
# 获取表结构
|
||
cursor.execute(f"PRAGMA table_info({self.current_table})")
|
||
columns = cursor.fetchall()
|
||
column_names = [col[1] for col in columns]
|
||
|
||
# 更新表格显示
|
||
self.data_table.setRowCount(len(data))
|
||
self.data_table.setColumnCount(len(column_names))
|
||
self.data_table.setHorizontalHeaderLabels(column_names)
|
||
|
||
# 填充筛选后的数据
|
||
for row_idx, row_data in enumerate(data):
|
||
for col_idx, cell_data in enumerate(row_data):
|
||
# 处理None值和格式化数据
|
||
if cell_data is None:
|
||
display_text = ""
|
||
elif isinstance(cell_data, (int, float)):
|
||
# 数字类型保持原样，但转换为字符串
|
||
display_text = str(cell_data)
|
||
else:
|
||
# 文本类型，保留原始格式，包括换行符
|
||
display_text = str(cell_data)
|
||
|
||
item = QTableWidgetItem(display_text)
|
||
item.setToolTip(display_text) # 添加悬停提示
|
||
self.data_table.setItem(row_idx, col_idx, item)
|
||
|
||
# 调整列宽 - 使用Interactive模式让用户可以手动调整
|
||
header = self.data_table.horizontalHeader()
|
||
header.setSectionResizeMode(QHeaderView.Interactive)
|
||
|
||
# 设置初始列宽为内容宽度，但有最大宽度限制
|
||
for col in range(len(column_names)):
|
||
# 计算该列内容的最大宽度
|
||
max_width = 0
|
||
for row in range(min(100, len(data))): # 只检查前100行，避免性能问题
|
||
item = self.data_table.item(row, col)
|
||
if item and item.text():
|
||
text_width = self.data_table.fontMetrics().horizontalAdvance(item.text()) + 20
|
||
max_width = max(max_width, text_width)
|
||
|
||
# 设置列宽，最小100像素，最大400像素
|
||
column_width = min(max(max_width, 100), 400)
|
||
self.data_table.setColumnWidth(col, column_width)
|
||
|
||
# 启用清除筛选按钮
|
||
self.clear_filter_button.setEnabled(True)
|
||
|
||
if match:
|
||
logger.info(f"应用数值筛选条件: {selected_field} {operator} {value}, 匹配到 {len(data)} 行数据")
|
||
self.status_bar.showMessage(f"筛选结果: {len(data)} 行数据 (条件: {selected_field} {operator} {value})")
|
||
else:
|
||
logger.info(f"应用文本筛选条件: {selected_field} LIKE '%{filter_condition}%', 匹配到 {len(data)} 行数据")
|
||
self.status_bar.showMessage(f"筛选结果: {len(data)} 行数据 (条件: {selected_field} 包含 '{filter_condition}')")
|
||
|
||
except sqlite3.Error as e:
|
||
logger.error(f"筛选数据失败: {e}")
|
||
QMessageBox.critical(self, "错误", f"筛选数据失败: {e}")
|
||
|
||
def clear_filter(self):
|
||
"""清除筛选条件，显示所有数据"""
|
||
if not self.current_table:
|
||
return
|
||
|
||
try:
|
||
# 重新加载完整数据
|
||
self.load_table_data(self.current_table)
|
||
|
||
# 清空筛选条件
|
||
self.filter_input.clear()
|
||
|
||
# 禁用清除筛选按钮
|
||
self.clear_filter_button.setEnabled(False)
|
||
|
||
logger.info("清除筛选条件，显示所有数据")
|
||
self.status_bar.showMessage("已清除筛选条件，显示所有数据")
|
||
|
||
except Exception as e:
|
||
logger.error(f"清除筛选失败: {e}")
|
||
QMessageBox.critical(self, "错误", f"清除筛选失败: {e}")
|
||
|
||
def refresh_data(self):
|
||
"""刷新当前数据"""
|
||
logger.info("刷新数据")
|
||
if self.current_table:
|
||
self.load_table_data(self.current_table)
|
||
else:
|
||
self.load_table_list()
|
||
|
||
def show_table_context_menu(self, position):
|
||
"""显示表格右键菜单"""
|
||
menu = QMenu()
|
||
|
||
# 添加菜单项
|
||
auto_resize_action = menu.addAction("自动调整列宽")
|
||
auto_resize_rows_action = menu.addAction("自动调整行高")
|
||
copy_action = menu.addAction("复制选中内容")
|
||
|
||
# 显示菜单
|
||
action = menu.exec(self.data_table.mapToGlobal(position))
|
||
|
||
if action == auto_resize_action:
|
||
self.auto_resize_columns()
|
||
elif action == auto_resize_rows_action:
|
||
self.auto_resize_rows()
|
||
elif action == copy_action:
|
||
self.copy_selected_content()
|
||
|
||
def auto_resize_columns(self):
|
||
"""自动调整所有列宽"""
|
||
logger.info("自动调整列宽")
|
||
|
||
# 遍历所有列
|
||
for col in range(self.data_table.columnCount()):
|
||
# 计算该列内容的最大宽度
|
||
max_width = 0
|
||
for row in range(min(100, self.data_table.rowCount())): # 只检查前100行
|
||
item = self.data_table.item(row, col)
|
||
if item and item.text():
|
||
text_width = self.data_table.fontMetrics().horizontalAdvance(item.text()) + 20
|
||
max_width = max(max_width, text_width)
|
||
|
||
# 设置列宽，最小100像素，最大500像素
|
||
column_width = min(max(max_width, 100), 500)
|
||
self.data_table.setColumnWidth(col, column_width)
|
||
|
||
self.status_bar.showMessage("已自动调整列宽")
|
||
|
||
def auto_resize_rows(self):
|
||
"""自动调整所有行高"""
|
||
logger.info("自动调整行高")
|
||
|
||
# 触发重新计算行高
|
||
self.data_table.resizeRowsToContents()
|
||
|
||
self.status_bar.showMessage("已自动调整行高")
|
||
|
||
def copy_selected_content(self):
|
||
"""复制选中的内容"""
|
||
selected_items = self.data_table.selectedItems()
|
||
if not selected_items:
|
||
return
|
||
|
||
# 按行列组织数据
|
||
rows = {}
|
||
for item in selected_items:
|
||
row = item.row()
|
||
col = item.column()
|
||
if row not in rows:
|
||
rows[row] = {}
|
||
rows[row][col] = item.text()
|
||
|
||
# 构建复制的文本
|
||
text_lines = []
|
||
for row in sorted(rows.keys()):
|
||
row_data = []
|
||
for col in sorted(rows[row].keys()):
|
||
row_data.append(rows[row][col])
|
||
text_lines.append('\t'.join(row_data))
|
||
|
||
# 复制到剪贴板
|
||
clipboard = QApplication.clipboard()
|
||
clipboard.setText('\n'.join(text_lines))
|
||
|
||
self.status_bar.showMessage(f"已复制 {len(selected_items)} 个单元格的内容")
|
||
|
||
def closeEvent(self, event):
|
||
"""关闭事件处理"""
|
||
logger.info("关闭应用程序")
|
||
if self.db_connection:
|
||
self.db_connection.close()
|
||
event.accept()
|
||
|
||
|
||
def main():
|
||
"""主函数"""
|
||
logger.info("启动SQLite数据库查看器")
|
||
|
||
# 配置日志
|
||
logger.add("sqlite_viewer.log", rotation="10 MB", level="INFO")
|
||
|
||
app = QApplication(sys.argv)
|
||
|
||
# 设置应用程序信息
|
||
app.setApplicationName("SQLite数据库查看器")
|
||
app.setApplicationVersion("1.0.0")
|
||
|
||
viewer = SQLiteViewer()
|
||
viewer.show()
|
||
|
||
logger.info("应用程序启动完成")
|
||
sys.exit(app.exec())
|
||
|
||
|
||
if __name__ == "__main__":
|
||
main() |