pyqt5 - 如何用鼠标点击父窗口的Qtablewidget中的某个单元格获取值，然后填充到子窗口的QlineEdit中？
问题描述
我想做一个函数，有点像 Excel 中的插入函数，就像这样：
现在我很困惑如何使用鼠标在父窗口（Qtablewidget）中获取数据并将数据填充到鼠标光标停留在子窗口中的lineEdit中。换句话说，我如何知道光标是哪个组件在。
这是 MainWindow.py：
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(1191, 941)
self.verticalLayout_3 = QtWidgets.QVBoxLayout(Form)
self.verticalLayout_3.setObjectName("verticalLayout_3")
self.verticalLayout_2 = QtWidgets.QVBoxLayout()
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.frame = QtWidgets.QFrame(Form)
self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame.setObjectName("frame")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.frame)
self.horizontalLayout.setObjectName("horizontalLayout")
self.pushButton = QtWidgets.QPushButton(self.frame)
self.pushButton.setObjectName("pushButton")
self.horizontalLayout.addWidget(self.pushButton)
self.pushButton_2 = QtWidgets.QPushButton(self.frame)
self.pushButton_2.setObjectName("pushButton_2")
self.horizontalLayout.addWidget(self.pushButton_2)
spacerItem = QtWidgets.QSpacerItem(940, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
self.horizontalLayout.addItem(spacerItem)
self.verticalLayout_2.addWidget(self.frame)
self.tabWidget = QtWidgets.QTabWidget(Form)
self.tabWidget.setTabPosition(QtWidgets.QTabWidget.West)
self.tabWidget.setObjectName("tabWidget")
self.tab = QtWidgets.QWidget()
self.tab.setObjectName("tab")
self.verticalLayout = QtWidgets.QVBoxLayout(self.tab)
self.verticalLayout.setObjectName("verticalLayout")
self.tableWidget = QtWidgets.QTableWidget(self.tab)
self.tableWidget.setRowCount(5)
self.tableWidget.setObjectName("tableWidget")
self.tableWidget.setColumnCount(4)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(0, item)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(1, item)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(2, item)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(3, item)
self.verticalLayout.addWidget(self.tableWidget)
self.tabWidget.addTab(self.tab, "")
self.tab_2 = QtWidgets.QWidget()
self.tab_2.setObjectName("tab_2")
self.tabWidget.addTab(self.tab_2, "")
self.verticalLayout_2.addWidget(self.tabWidget)
self.verticalLayout_3.addLayout(self.verticalLayout_2)
self.retranslateUi(Form)
self.tabWidget.setCurrentIndex(0)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Form"))
self.pushButton.setText(_translate("Form", "PushButton"))
self.pushButton_2.setText(_translate("Form", "PushButton"))
item = self.tableWidget.horizontalHeaderItem(0)
item.setText(_translate("Form", "A"))
item = self.tableWidget.horizontalHeaderItem(1)
item.setText(_translate("Form", "B"))
item = self.tableWidget.horizontalHeaderItem(2)
item.setText(_translate("Form", "C"))
item = self.tableWidget.horizontalHeaderItem(3)
item.setText(_translate("Form", "D"))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate("Form", "Tab 1"))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("Form", "Tab 2"))
这是 ChildWindow.py：
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(558, 331)
self.verticalLayout_2 = QtWidgets.QVBoxLayout(Dialog)
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.frame = QtWidgets.QFrame(Dialog)
self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame.setObjectName("frame")
self.verticalLayout = QtWidgets.QVBoxLayout(self.frame)
self.verticalLayout.setObjectName("verticalLayout")
self.groupBox = QtWidgets.QGroupBox(self.frame)
self.groupBox.setObjectName("groupBox")
self.gridLayout = QtWidgets.QGridLayout(self.groupBox)
self.gridLayout.setObjectName("gridLayout")
self.label = QtWidgets.QLabel(self.groupBox)
self.label.setObjectName("label")
self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
self.lineEdit = QtWidgets.QLineEdit(self.groupBox)
self.lineEdit.setObjectName("lineEdit")
self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 1)
self.label_2 = QtWidgets.QLabel(self.groupBox)
self.label_2.setObjectName("label_2")
self.gridLayout.addWidget(self.label_2, 1, 0, 1, 1)
self.lineEdit_2 = QtWidgets.QLineEdit(self.groupBox)
self.lineEdit_2.setObjectName("lineEdit_2")
self.gridLayout.addWidget(self.lineEdit_2, 1, 1, 1, 1)
self.label_3 = QtWidgets.QLabel(self.groupBox)
self.label_3.setObjectName("label_3")
self.gridLayout.addWidget(self.label_3, 2, 0, 1, 1)
self.lineEdit_3 = QtWidgets.QLineEdit(self.groupBox)
self.lineEdit_3.setObjectName("lineEdit_3")
self.gridLayout.addWidget(self.lineEdit_3, 2, 1, 1, 1)
self.verticalLayout.addWidget(self.groupBox)
self.frame_2 = QtWidgets.QFrame(self.frame)
self.frame_2.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame_2.setFrameShadow(QtWidgets.QFrame.Sunken)
self.frame_2.setObjectName("frame_2")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.frame_2)
self.horizontalLayout.setObjectName("horizontalLayout")
spacerItem = QtWidgets.QSpacerItem(88, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
self.horizontalLayout.addItem(spacerItem)
self.pushButton_3 = QtWidgets.QPushButton(self.frame_2)
self.pushButton_3.setObjectName("pushButton_3")
self.horizontalLayout.addWidget(self.pushButton_3)
spacerItem1 = QtWidgets.QSpacerItem(87, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
self.horizontalLayout.addItem(spacerItem1)
self.verticalLayout.addWidget(self.frame_2)
self.verticalLayout_2.addWidget(self.frame)
self.line = QtWidgets.QFrame(Dialog)
self.line.setFrameShape(QtWidgets.QFrame.HLine)
self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
self.line.setObjectName("line")
self.verticalLayout_2.addWidget(self.line)
self.frame_3 = QtWidgets.QFrame(Dialog)
self.frame_3.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame_3.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame_3.setObjectName("frame_3")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.frame_3)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
spacerItem2 = QtWidgets.QSpacerItem(150, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
self.horizontalLayout_2.addItem(spacerItem2)
self.pushButton_4 = QtWidgets.QPushButton(self.frame_3)
self.pushButton_4.setObjectName("pushButton_4")
self.horizontalLayout_2.addWidget(self.pushButton_4)
self.pushButton_5 = QtWidgets.QPushButton(self.frame_3)
self.pushButton_5.setObjectName("pushButton_5")
self.horizontalLayout_2.addWidget(self.pushButton_5)
spacerItem3 = QtWidgets.QSpacerItem(149, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
self.horizontalLayout_2.addItem(spacerItem3)
self.verticalLayout_2.addWidget(self.frame_3)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "IF_1"))
self.groupBox.setTitle(_translate("Dialog", "IF"))
self.label.setText(_translate("Dialog", "Logical_text"))
self.label_2.setText(_translate("Dialog", "True_value"))
self.label_3.setText(_translate("Dialog", "Flase_value"))
self.pushButton_3.setToolTip(_translate("Dialog", "<html><head/><body><p>打开下一级嵌套</p></body></html>"))
self.pushButton_3.setText(_translate("Dialog", "Nested"))
self.pushButton_4.setText(_translate("Dialog", "Save"))
self.pushButton_5.setText(_translate("Dialog", "Close"))
这是逻辑文件：
import sys, traceback
from PyQt5 import QtCore
from PyQt5.QtWidgets import QApplication, QMenu, QTableWidgetItem, QWidget, QDialog, QMessageBox
from PyQt5.QtCore import QObject, Qt, pyqtSignal
from UI.test import test
from UI.test.IF_1 import Ui_Dialog
class IF_window(QDialog, Ui_Dialog):
Signal = pyqtSignal(str)
def __init__(self):
super(IF_window, self).__init__()
self.setupUi(self)
#self.pushButton_3.clicked.connect(self.btnclick)
self.pushButton_4.clicked.connect(self.trans_data)
self.pushButton_5.clicked.connect(self.close)
def trans_data(self):
a = self.lineEdit.text()
b = self.lineEdit_2.text()
c = self.lineEdit_3.text()
d = 'IF(' + a + ',' + b + ',' + c + ')'
self.Signal.emit(d)
QMessageBox.information(self, "notice", "Save success！", QMessageBox.Yes)
def btnclick(self):
try:
self.form = IF_window_2()
#styleFile = 'E:\Development\Study\Qss\qss.css'
#qssStyle = CommonHelper.readQss(styleFile)
#self.form.setStyleSheet(qssStyle)
self.form.Signal_1.connect(self.signal_text_1)
self.form.Signal_2.connect(self.signal_text_2)
self.form.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)
self.form.show()
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
a = repr(traceback.format_exception(exc_type, exc_value,
exc_traceback))
QMessageBox.information(self, "notice", a, QMessageBox.Yes)
def signal_text_1(self, d):
self.lineEdit_2.setText(d)
def signal_text_2(self, d):
self.lineEdit_3.setText(d)
class MyMainWindow(QWidget, test.Ui_Form):
def __init__(self):
super(MyMainWindow, self).__init__()
self.setupUi(self)
self.tableWidget.setContextMenuPolicy(Qt.CustomContextMenu)
self.tableWidget.customContextMenuRequested.connect(self.generateMenu)
def generateMenu(self, pos):
try:
column_num = -1
row_sum = []
column_sum = []
for i in self.tableWidget.selectionModel().selection().indexes():
row_num = i.row()
column_num = i.column()
row_sum.append(row_num)
column_sum.append(column_num)
if column_num != -1:
menu = QMenu()
item1 = menu.addAction(u"IF_function")
action = menu.exec_(self.tableWidget.mapToGlobal(pos))
if action == item1:
self.form = IF_window()
#styleFile = 'E:\Development\Study\Qss\qss.css'
#qssStyle = CommonHelper.readQss(styleFile)
#self.form.setStyleSheet(qssStyle)
self.form.Signal.connect(self.get_data)
self.form.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)
self.form.show()
else:
return
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
a = repr(traceback.format_exception(exc_type, exc_value,
exc_traceback))
QMessageBox.information(self, "notice", a, QMessageBox.Yes)
def get_data(self, d):
try:
row_sum = []
column_sum = []
for i in self.tableWidget.selectionModel().selection().indexes():
row_num = i.row()
column_num = i.column()
row_sum.append(row_num)
column_sum.append(column_num)
data = QTableWidgetItem(d)
self.tableWidget.setItem(row_sum[0], column_sum[0], data)
print(row_sum[0], column_sum[0])
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
a = repr(traceback.format_exception(exc_type, exc_value,
exc_traceback))
QMessageBox.information(self, "notice", a, QMessageBox.Yes)
class CommonHelper:
def __init__(self):
pass
@staticmethod
def readQss(style):
with open(style, 'r', encoding='UTF-8') as f:
return f.read()
if __name__ == "__main__":
app = QApplication(sys.argv)
win = MyMainWindow()
#styleFile = 'E:\Development\Study\Qss\qss.css'
#qssStyle = CommonHelper.readQss(styleFile)
#win.setStyleSheet(qssStyle)
win.show()
sys.exit(app.exec_())
解决方案
我通过向子窗口的 LineEdit 添加一个 clicked 信号来解决这个问题，该信号会触发一个文本信号。父窗口接收信号并使用文本来确定单击了哪个子窗口的 LineEdit，然后获取父窗口的单击单元格的值，并且简单设置文本（）。
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