满足条件时更改 PyQt5 QTableWidget 行样式表答案

【问题标题】：change PyQt5 QTableWidget row stylesheet when a condition is met满足条件时更改 PyQt5 QTableWidget 行样式表
【发布时间】：2021-01-30 10:52:08
【问题描述】：

在下图中，我有一个 QTableWidget 来查看一对多关系 sqlite 数据库中的数据，我设法合并一些列输出以正确显示数据，使用 setspan 功能和 @eyllanesc 的 answer 的帮助。

我现在想要实现的是用背景颜色（交替颜色）为每个订单着色以提高可读性，尝试了 table.setAlternatingRowColors(True) 但是当订单包含多个项目时它会失败！如何实现条件行样式？

import sys
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import *

query_result = [(683, 18, 765, 1.73, '1 ring ruby ring', 685.71, 'vincent percy', 'john joseph croft'), (684, 14, 900, 4.48, '1 earring ear drop', 534.86, 'Ben Otten', 'Anne Cooksley Beltrame'), (684, 14, 900, 2.1, '1 ring cluster ring', 534.86, 'Ben Otten', 'Anne Cooksley Beltrame'), (684, 18, 900, 1.3, '1 ring eternity band', 685.71, 'Ben Otten', 'Anne Cooksley Beltrame'), (685, 14, 200, 3.26, '1 ring promise ring', 534.86, 'raymond bob', 'owen george taylor'), (686, 24, 450, 10.0, '1 bullion Gold bar', 914.28, 'vincent percy', 'owen george taylor'), (687, 14, 345, 4.75, '1 earring Dangles Earring', 534.86, 'Ben Otten', 'dan justin balmers'), (688, 18, 810, 3.1, '1 earring fish hookEarring', 677.14, 'raymond bob', 'jeff david steve'), (688, 21, 810, 2.6, '1 ring ANTIQUE RING', 790, 'raymond bob', 'jeff david steve')]


class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("mini_ui")
        self.setGeometry(300, 150, 800, 600)
        self.Ui()

    def Ui(self):
        vbox = QVBoxLayout()
        btn_show_table = QPushButton("view sample data")
        btn_show_table.clicked.connect(self.today_sales_table)
        self.viewTodayTable = QTableWidget()
        self.viewTodayTable.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
        self.viewTodayTable.setObjectName("viewTodayTable")
        self.viewTodayTable.setColumnCount(8)
        self.viewTodayTable.setRowCount(0)
        self.viewTodayTable.setHorizontalHeaderItem(0, QtWidgets.QTableWidgetItem("Order ID"))
        self.viewTodayTable.setHorizontalHeaderItem(1, QtWidgets.QTableWidgetItem("Karat"))
        self.viewTodayTable.setHorizontalHeaderItem(2, QtWidgets.QTableWidgetItem("Price"))
        self.viewTodayTable.setHorizontalHeaderItem(3, QtWidgets.QTableWidgetItem("Weight"))
        self.viewTodayTable.setHorizontalHeaderItem(4, QtWidgets.QTableWidgetItem("Description"))
        self.viewTodayTable.setHorizontalHeaderItem(5, QtWidgets.QTableWidgetItem("Gram price"))
        self.viewTodayTable.setHorizontalHeaderItem(6, QtWidgets.QTableWidgetItem("Employee"))
        self.viewTodayTable.setHorizontalHeaderItem(7, QtWidgets.QTableWidgetItem("Client"))
        self.viewTodayTable.horizontalHeader().setDefaultSectionSize(130)
        self.viewTodayTable.horizontalHeader().setSortIndicatorShown(True)
        self.viewTodayTable.horizontalHeader().setStretchLastSection(True)
        vbox.addWidget(btn_show_table)
        vbox.addWidget(self.viewTodayTable)
        self.setLayout(vbox)
        self.show()

    def apply_span_to_sales_table(self, row, nrow):
        if nrow <= 1:
            return
        for c in (0, 2, 6, 7):
            self.viewTodayTable.setSpan(row, c, nrow, 1)
            for r in range(row + 1, row + nrow):
                t = self.viewTodayTable.takeItem(r, c)
                del t

    def today_sales_table(self):
        today_result = query_result
        self.viewTodayTable.setRowCount(0)

        last_id = -1
        start_row = 0
        for row_number, row_data in enumerate(today_result):
            self.viewTodayTable.insertRow(row_number)
            current_id, *other_values = row_data
            for column_number, data in enumerate(row_data):
                it = QtWidgets.QTableWidgetItem(str(data))
                self.viewTodayTable.setItem(row_number, column_number, it)
            if last_id != current_id and last_id != -1:
                self.apply_span_to_sales_table(start_row, row_number - start_row)
                start_row = row_number
            last_id = current_id
            if start_row != row_number:
                self.apply_span_to_sales_table(start_row, self.viewTodayTable.rowCount() - start_row)


def main():
    App = QApplication(sys.argv)
    window = Window()
    sys.exit(App.exec())


if __name__ == '__main__':
    main()

【问题讨论】：

请提供minimal reproducible example
@eyllanesc 完成，链接中还提供了一个示例数据库数据用于测试

标签： python pyqt5 qtablewidget

【解决方案1】：

经过一番搜索，设法以这种方式解决了问题：

如果订单号是奇数，则用颜色1着色，如果是偶数，用颜色2着色

这是工作代码

import sys
from PyQt5 import QtWidgets, QtGui, Qt
from PyQt5.QtGui import QColor
from PyQt5.QtWidgets import *


prev_day = "2020-10-15"
query_result = [(683, 18, 765, 1.73, '1 ring ruby ring', 685.71, 'vincent percy', 'john joseph croft'), (684, 14, 900, 4.48, '1 earring ear drop', 534.86, 'Ben Otten', 'Anne Cooksley Beltrame'), (684, 14, 900, 2.1, '1 ring cluster ring', 534.86, 'Ben Otten', 'Anne Cooksley Beltrame'), (684, 18, 900, 1.3, '1 ring eternity band', 685.71, 'Ben Otten', 'Anne Cooksley Beltrame'), (685, 14, 200, 3.26, '1 ring promise ring', 534.86, 'raymond bob', 'owen george taylor'), (686, 24, 450, 10.0, '1 bullion Gold bar', 914.28, 'vincent percy', 'owen george taylor'), (687, 14, 345, 4.75, '1 earring Dangles Earring', 534.86, 'Ben Otten', 'dan justin balmers'), (688, 18, 810, 3.1, '1 earring fish hookEarring', 677.14, 'raymond bob', 'jeff david steve'), (688, 21, 810, 2.6, '1 ring ANTIQUE RING', 790, 'raymond bob', 'jeff david steve')]


class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("mini_ui")
        self.setGeometry(300, 150, 800, 600)
        self.Ui()

    def Ui(self):
        vbox = QVBoxLayout()
        btn_show_table = QPushButton("view sample data")
        btn_show_table.clicked.connect(self.today_sales_table)
        self.viewTodayTable = QTableWidget()
        self.viewTodayTable.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
        self.viewTodayTable.setObjectName("viewTodayTable")
        self.viewTodayTable.setColumnCount(8)
        self.viewTodayTable.setRowCount(0)
        self.viewTodayTable.setHorizontalHeaderItem(0, QtWidgets.QTableWidgetItem("Order ID"))
        self.viewTodayTable.setHorizontalHeaderItem(1, QtWidgets.QTableWidgetItem("Karat"))
        self.viewTodayTable.setHorizontalHeaderItem(2, QtWidgets.QTableWidgetItem("Price"))
        self.viewTodayTable.setHorizontalHeaderItem(3, QtWidgets.QTableWidgetItem("Weight"))
        self.viewTodayTable.setHorizontalHeaderItem(4, QtWidgets.QTableWidgetItem("Description"))
        self.viewTodayTable.setHorizontalHeaderItem(5, QtWidgets.QTableWidgetItem("Gram price"))
        self.viewTodayTable.setHorizontalHeaderItem(6, QtWidgets.QTableWidgetItem("Employee"))
        self.viewTodayTable.setHorizontalHeaderItem(7, QtWidgets.QTableWidgetItem("Client"))
        self.viewTodayTable.horizontalHeader().setDefaultSectionSize(130)
        self.viewTodayTable.horizontalHeader().setSortIndicatorShown(True)
        self.viewTodayTable.horizontalHeader().setStretchLastSection(True)

        vbox.addWidget(btn_show_table)
        vbox.addWidget(self.viewTodayTable)
        self.setLayout(vbox)

        self.show()

    def apply_span_to_sales_table(self, row, nrow):
        if nrow <= 1:
            return
        for c in (0, 2, 6, 7):
            self.viewTodayTable.setSpan(row, c, nrow, 1)
            for r in range(row + 1, row + nrow):
                t = self.viewTodayTable.takeItem(r, c)
                del t

    def today_sales_table(self):
        today_result = query_result
        self.viewTodayTable.setRowCount(0)

        last_id = -1
        start_row = 0
        for row_number, row_data in enumerate(today_result):
            self.viewTodayTable.insertRow(row_number)
            current_id, *other_values = row_data

            for column_number, data in enumerate(row_data):
                it = QtWidgets.QTableWidgetItem(str(data))

                self.viewTodayTable.setItem(row_number, column_number, it)

                if current_id % 2 == 1:
                    self.viewTodayTable.item(row_number, column_number).setBackground(QColor(185, 206, 172))
                    print("whats up")
                elif current_id % 2 == 0:
                    self.viewTodayTable.item(row_number, column_number).setBackground(QColor(193, 171, 206))
                    print("whats up 2")

                if last_id != current_id and last_id != -1:
                    self.apply_span_to_sales_table(start_row, row_number - start_row)
                    start_row = row_number

                last_id = current_id
                if start_row != row_number:
                    self.apply_span_to_sales_table(start_row, self.viewTodayTable.rowCount() - start_row)


def main():
    App = QApplication(sys.argv)
    window = Window()
    sys.exit(App.exec())


if __name__ == '__main__':
    main()

【讨论】：