[英]Qt5 QComboBox focusOutEvent
我已经构建了一个 GUI,除此之外,我正在使用一个 QComboBox(下拉菜单),其中包含三个条目。 我想启用/禁用 GUI 中的其他一些框和标签,具体取决于在 QComboBox 中选择了哪个条目。 到目前为止,我已经设法做到了。
我的问题是,只有当我按下执行应用程序的“运行”按钮时,所有更改才会生效。
我想要做的是启用/禁用相关框的操作,一旦我从下拉菜单中选择了条目,而不是等到我按下“运行”按钮。
有没有办法做这样的事情? 我可以使用 focusOutEvent 来检查用户何时单击了下拉菜单以外的任何位置并在其他框/标签中应用更改?
我把“控制”我的 GUI 的类放在下面,但我没有发布生成 GUI 的实际类,因为它太长了。 如果你认为它是相关的,我可以发布它。 我发布了一张 GUI 的图片。 GUI当“Measuring Mode”下拉框设置为“Cable loss”或“Amplifier”时,黑色圆圈中的框和标签应该被禁用。 当它设置为“混合器”时,它们应该被启用。 我在 Window 类的 user_input 函数中使用 if 语句启用/禁用框和标签。 想要的下拉菜单由“mode_select”变量表示。
编辑:如果没有实际的 gui 代码,我认为我的解释不是很直观,所以我把它贴在下面。
from PyQt5 import QtWidgets, QtCore
from converter import convert_ui
import sys
import os
import time
class Window(QtWidgets.QMainWindow):
def __init__(self):
from transfer_function_gui import Ui_MainWindow
QtWidgets.QMainWindow.__init__(self)
self.ui = Ui_MainWindow()
self.ui.setupUi(self) # setup GUI
self.ui.run_button_PM_tab.clicked.connect(self.user_input)
def user_input(self):
test_mode = self.ui.mode_select.currentText() # type: str
if test_mode == "Mixer":
self.ui.LO_Power_input.setEnabled(True)
self.ui.LO_Power_lbl.setEnabled(True)
self.ui.LO_freq_input.setEnabled(True)
self.ui.LO_freq_lbl.setEnabled(True)
else:
self.ui.LO_Power_input.setEnabled(False)
self.ui.LO_Power_lbl.setEnabled(False)
self.ui.LO_freq_input.setEnabled(False)
self.ui.LO_freq_lbl.setEnabled(False)
############################### Main ###############################
if __name__=='__main__':
convert_ui('transfer_function_gui.ui')
app = QtWidgets.QApplication(sys.argv)
app.setStyle('Fusion')
window = Window()
window.show()
sys.exit(app.exec_())
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setEnabled(True)
MainWindow.resize(770, 613)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
self.progressBar.setGeometry(QtCore.QRect(10, 520, 630, 30))
self.progressBar.setProperty("value", 0)
self.progressBar.setObjectName("progressBar")
self.Dev_address_frame = QtWidgets.QGroupBox(self.centralwidget)
self.Dev_address_frame.setGeometry(QtCore.QRect(10, 10, 371, 140))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.Dev_address_frame.sizePolicy().hasHeightForWidth())
self.Dev_address_frame.setSizePolicy(sizePolicy)
self.Dev_address_frame.setMinimumSize(QtCore.QSize(0, 100))
font = QtGui.QFont()
font.setPointSize(8)
self.Dev_address_frame.setFont(font)
self.Dev_address_frame.setFlat(False)
self.Dev_address_frame.setCheckable(False)
self.Dev_address_frame.setObjectName("Dev_address_frame")
self.SigGen_label = QtWidgets.QLabel(self.Dev_address_frame)
self.SigGen_label.setGeometry(QtCore.QRect(20, 30, 100, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Maximum, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.SigGen_label.sizePolicy().hasHeightForWidth())
self.SigGen_label.setSizePolicy(sizePolicy)
self.SigGen_label.setObjectName("SigGen_label")
self.PM_label = QtWidgets.QLabel(self.Dev_address_frame)
self.PM_label.setGeometry(QtCore.QRect(20, 70, 100, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.PM_label.sizePolicy().hasHeightForWidth())
self.PM_label.setSizePolicy(sizePolicy)
self.PM_label.setObjectName("PM_label")
self.SigGen_addr_input = QtWidgets.QLineEdit(self.Dev_address_frame)
self.SigGen_addr_input.setGeometry(QtCore.QRect(120, 30, 180, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.SigGen_addr_input.sizePolicy().hasHeightForWidth())
self.SigGen_addr_input.setSizePolicy(sizePolicy)
self.SigGen_addr_input.setObjectName("SigGen_addr_input")
self.PM_addr_input = QtWidgets.QLineEdit(self.Dev_address_frame)
self.PM_addr_input.setGeometry(QtCore.QRect(120, 70, 180, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.PM_addr_input.sizePolicy().hasHeightForWidth())
self.PM_addr_input.setSizePolicy(sizePolicy)
self.PM_addr_input.setObjectName("PM_addr_input")
self.PM_cnct_checkBox = QtWidgets.QCheckBox(self.Dev_address_frame)
self.PM_cnct_checkBox.setEnabled(False)
self.PM_cnct_checkBox.setGeometry(QtCore.QRect(240, 105, 16, 20))
self.PM_cnct_checkBox.setText("")
self.PM_cnct_checkBox.setObjectName("PM_cnct_checkBox")
self.PM_cnct_lbl = QtWidgets.QLabel(self.Dev_address_frame)
self.PM_cnct_lbl.setEnabled(False)
self.PM_cnct_lbl.setGeometry(QtCore.QRect(20, 105, 210, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.PM_cnct_lbl.sizePolicy().hasHeightForWidth())
self.PM_cnct_lbl.setSizePolicy(sizePolicy)
self.PM_cnct_lbl.setObjectName("PM_cnct_lbl")
self.Freq_setup_frame = QtWidgets.QGroupBox(self.centralwidget)
self.Freq_setup_frame.setGeometry(QtCore.QRect(10, 200, 370, 181))
font = QtGui.QFont()
font.setPointSize(8)
self.Freq_setup_frame.setFont(font)
self.Freq_setup_frame.setFlat(False)
self.Freq_setup_frame.setCheckable(False)
self.Freq_setup_frame.setObjectName("Freq_setup_frame")
self.Start_freq_lbl = QtWidgets.QLabel(self.Freq_setup_frame)
self.Start_freq_lbl.setEnabled(True)
self.Start_freq_lbl.setGeometry(QtCore.QRect(20, 30, 100, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.Start_freq_lbl.sizePolicy().hasHeightForWidth())
self.Start_freq_lbl.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setPointSize(8)
self.Start_freq_lbl.setFont(font)
self.Start_freq_lbl.setMidLineWidth(0)
self.Start_freq_lbl.setText("Start freq. ")
self.Start_freq_lbl.setObjectName("Start_freq_lbl")
self.Stop_freq_lbl = QtWidgets.QLabel(self.Freq_setup_frame)
self.Stop_freq_lbl.setGeometry(QtCore.QRect(20, 70, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.Stop_freq_lbl.setFont(font)
self.Stop_freq_lbl.setObjectName("Stop_freq_lbl")
self.Step_freq_lbl = QtWidgets.QLabel(self.Freq_setup_frame)
self.Step_freq_lbl.setGeometry(QtCore.QRect(20, 110, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.Step_freq_lbl.setFont(font)
self.Step_freq_lbl.setObjectName("Step_freq_lbl")
self.StopFreq_input = QtWidgets.QLineEdit(self.Freq_setup_frame)
self.StopFreq_input.setGeometry(QtCore.QRect(120, 70, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.StopFreq_input.setFont(font)
self.StopFreq_input.setText("")
self.StopFreq_input.setObjectName("StopFreq_input")
self.Start_freq_input = QtWidgets.QLineEdit(self.Freq_setup_frame)
self.Start_freq_input.setGeometry(QtCore.QRect(120, 30, 180, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.Start_freq_input.sizePolicy().hasHeightForWidth())
self.Start_freq_input.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setPointSize(8)
self.Start_freq_input.setFont(font)
self.Start_freq_input.setText("")
self.Start_freq_input.setObjectName("Start_freq_input")
self.StepFreq_input = QtWidgets.QLineEdit(self.Freq_setup_frame)
self.StepFreq_input.setGeometry(QtCore.QRect(120, 110, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.StepFreq_input.setFont(font)
self.StepFreq_input.setText("")
self.StepFreq_input.setObjectName("StepFreq_input")
self.freq_units_select = QtWidgets.QComboBox(self.Freq_setup_frame)
self.freq_units_select.setGeometry(QtCore.QRect(310, 29, 51, 141))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.freq_units_select.sizePolicy().hasHeightForWidth())
self.freq_units_select.setSizePolicy(sizePolicy)
self.freq_units_select.setMinimumSize(QtCore.QSize(0, 70))
font = QtGui.QFont()
font.setPointSize(8)
self.freq_units_select.setFont(font)
self.freq_units_select.setInsertPolicy(QtWidgets.QComboBox.InsertAtBottom)
self.freq_units_select.setSizeAdjustPolicy(QtWidgets.QComboBox.AdjustToContentsOnFirstShow)
self.freq_units_select.setFrame(True)
self.freq_units_select.setObjectName("freq_units_select")
self.freq_units_select.addItem("")
self.freq_units_select.addItem("")
self.freq_units_select.addItem("")
self.LO_freq_lbl = QtWidgets.QLabel(self.Freq_setup_frame)
self.LO_freq_lbl.setGeometry(QtCore.QRect(20, 150, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_freq_lbl.setFont(font)
self.LO_freq_lbl.setObjectName("LO_freq_lbl")
self.LO_freq_input = QtWidgets.QLineEdit(self.Freq_setup_frame)
self.LO_freq_input.setGeometry(QtCore.QRect(120, 150, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_freq_input.setFont(font)
self.LO_freq_input.setText("")
self.LO_freq_input.setObjectName("LO_freq_input")
self.Power_setup_frame = QtWidgets.QGroupBox(self.centralwidget)
self.Power_setup_frame.setGeometry(QtCore.QRect(10, 390, 370, 111))
font = QtGui.QFont()
font.setPointSize(8)
self.Power_setup_frame.setFont(font)
self.Power_setup_frame.setFlat(False)
self.Power_setup_frame.setCheckable(False)
self.Power_setup_frame.setObjectName("Power_setup_frame")
self.DUT_input_lbl = QtWidgets.QLabel(self.Power_setup_frame)
self.DUT_input_lbl.setGeometry(QtCore.QRect(20, 30, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.DUT_input_lbl.setFont(font)
self.DUT_input_lbl.setObjectName("DUT_input_lbl")
self.LO_Power_lbl = QtWidgets.QLabel(self.Power_setup_frame)
self.LO_Power_lbl.setGeometry(QtCore.QRect(20, 70, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_Power_lbl.setFont(font)
self.LO_Power_lbl.setObjectName("LO_Power_lbl")
self.DUT_Input_power_input = QtWidgets.QLineEdit(self.Power_setup_frame)
self.DUT_Input_power_input.setGeometry(QtCore.QRect(120, 30, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.DUT_Input_power_input.setFont(font)
self.DUT_Input_power_input.setText("")
self.DUT_Input_power_input.setObjectName("DUT_Input_power_input")
self.LO_Power_input = QtWidgets.QLineEdit(self.Power_setup_frame)
self.LO_Power_input.setGeometry(QtCore.QRect(120, 70, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_Power_input.setFont(font)
self.LO_Power_input.setText("")
self.LO_Power_input.setObjectName("LO_Power_input")
self.LO_dBm = QtWidgets.QLabel(self.Power_setup_frame)
self.LO_dBm.setGeometry(QtCore.QRect(320, 70, 20, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_dBm.setFont(font)
self.LO_dBm.setObjectName("LO_dBm")
self.DUT_dBm = QtWidgets.QLabel(self.Power_setup_frame)
self.DUT_dBm.setGeometry(QtCore.QRect(320, 30, 20, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.DUT_dBm.setFont(font)
self.DUT_dBm.setObjectName("DUT_dBm")
self.mode_label = QtWidgets.QLabel(self.centralwidget)
self.mode_label.setGeometry(QtCore.QRect(30, 165, 100, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.mode_label.sizePolicy().hasHeightForWidth())
self.mode_label.setSizePolicy(sizePolicy)
self.mode_label.setBaseSize(QtCore.QSize(0, 0))
self.mode_label.setObjectName("mode_label")
self.mode_select = QtWidgets.QComboBox(self.centralwidget)
self.mode_select.setGeometry(QtCore.QRect(130, 165, 180, 20))
self.mode_select.setObjectName("mode_select")
self.mode_select.addItem("")
self.mode_select.addItem("")
self.mode_select.addItem("")
self.run_button_PM_tab = QtWidgets.QPushButton(self.centralwidget)
self.run_button_PM_tab.setEnabled(True)
self.run_button_PM_tab.setGeometry(QtCore.QRect(650, 520, 100, 30))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.run_button_PM_tab.sizePolicy().hasHeightForWidth())
self.run_button_PM_tab.setSizePolicy(sizePolicy)
self.run_button_PM_tab.setMinimumSize(QtCore.QSize(0, 0))
self.run_button_PM_tab.setLayoutDirection(QtCore.Qt.LeftToRight)
self.run_button_PM_tab.setObjectName("run_button_PM_tab")
self.S21_table = QtWidgets.QTableWidget(self.centralwidget)
self.S21_table.setGeometry(QtCore.QRect(400, 10, 360, 490))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Minimum)
sizePolicy.setHorizontalStretch(33)
sizePolicy.setVerticalStretch(25)
sizePolicy.setHeightForWidth(self.S21_table.sizePolicy().hasHeightForWidth())
self.S21_table.setSizePolicy(sizePolicy)
self.S21_table.setMinimumSize(QtCore.QSize(15, 35))
self.S21_table.setSizeIncrement(QtCore.QSize(0, 0))
self.S21_table.setBaseSize(QtCore.QSize(0, 0))
self.S21_table.setObjectName("S21_table")
self.S21_table.setColumnCount(2)
self.S21_table.setRowCount(1)
item = QtWidgets.QTableWidgetItem()
self.S21_table.setVerticalHeaderItem(0, item)
item = QtWidgets.QTableWidgetItem()
item.setTextAlignment(QtCore.Qt.AlignCenter)
self.S21_table.setHorizontalHeaderItem(0, item)
item = QtWidgets.QTableWidgetItem()
self.S21_table.setHorizontalHeaderItem(1, item)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 770, 21))
self.menubar.setObjectName("menubar")
self.menuFile = QtWidgets.QMenu(self.menubar)
self.menuFile.setObjectName("menuFile")
self.menuAbout = QtWidgets.QMenu(self.menubar)
self.menuAbout.setObjectName("menuAbout")
self.menuPreferences = QtWidgets.QMenu(self.menubar)
self.menuPreferences.setObjectName("menuPreferences")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.actionSave_as = QtWidgets.QAction(MainWindow)
self.actionSave_as.setObjectName("actionSave_as")
self.actionExit = QtWidgets.QAction(MainWindow)
self.actionExit.setObjectName("actionExit")
self.menuFile.addAction(self.actionSave_as)
self.menuFile.addAction(self.actionExit)
self.menubar.addAction(self.menuFile.menuAction())
self.menubar.addAction(self.menuPreferences.menuAction())
self.menubar.addAction(self.menuAbout.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "Transfer Function Calculator v0.5"))
self.Dev_address_frame.setTitle(_translate("MainWindow", "Device addresses (GPIB, USB, TCPIP)"))
self.SigGen_label.setText(_translate("MainWindow", "Signal Generator"))
self.PM_label.setText(_translate("MainWindow", "Power Meter"))
self.PM_cnct_lbl.setText(_translate("MainWindow", "If PM is connected to SigGen check the box"))
self.Freq_setup_frame.setTitle(_translate("MainWindow", "Frequency setup"))
self.Stop_freq_lbl.setText(_translate("MainWindow", "Stop freq."))
self.Step_freq_lbl.setText(_translate("MainWindow", "Step freq."))
self.freq_units_select.setCurrentText(_translate("MainWindow", "kHz"))
self.freq_units_select.setItemText(0, _translate("MainWindow", "kHz"))
self.freq_units_select.setItemText(1, _translate("MainWindow", "MHz"))
self.freq_units_select.setItemText(2, _translate("MainWindow", "GHz"))
self.LO_freq_lbl.setText(_translate("MainWindow", "LO freq."))
self.Power_setup_frame.setTitle(_translate("MainWindow", "Power setup"))
self.DUT_input_lbl.setText(_translate("MainWindow", "DUT Input power"))
self.LO_Power_lbl.setText(_translate("MainWindow", "LO Power"))
self.LO_dBm.setText(_translate("MainWindow", "dBm"))
self.DUT_dBm.setText(_translate("MainWindow", "dBm"))
self.mode_label.setText(_translate("MainWindow", "Measuring mode"))
self.mode_select.setItemText(0, _translate("MainWindow", "Cable loss"))
self.mode_select.setItemText(1, _translate("MainWindow", "Amplifier"))
self.mode_select.setItemText(2, _translate("MainWindow", "Mixer"))
self.run_button_PM_tab.setText(_translate("MainWindow", "Run"))
item = self.S21_table.verticalHeaderItem(0)
item.setText(_translate("MainWindow", "New Row"))
item = self.S21_table.horizontalHeaderItem(0)
item.setText(_translate("MainWindow", "New Column"))
item = self.S21_table.horizontalHeaderItem(1)
item.setText(_translate("MainWindow", "New Column"))
self.menuFile.setTitle(_translate("MainWindow", "File"))
self.menuAbout.setTitle(_translate("MainWindow", "About"))
self.menuPreferences.setTitle(_translate("MainWindow", "Settings..."))
self.actionSave_as.setText(_translate("MainWindow", "Save as..."))
self.actionExit.setText(_translate("MainWindow", "Exit"))
QComboBox 在此处使用这些信号,您可以使用信号和插槽进行连接。
我认为您想要使用的是 currentTextChanged 或 currentIndexChanged。 所以你可以在你的初始化中做这样的事情:
class Window(QtWidgets.QMainWindow):
def __init__(self):
from transfer_function_gui import Ui_MainWindow
QtWidgets.QMainWindow.__init__(self)
self.ui = Ui_MainWindow()
self.ui.setupUi(self) # setup GUI
self.ui.run_button_PM_tab.clicked.connect(self.user_input)
self.ui.freq_units_select.currentIndexChanged.connect(self.user_input)
self.ui.mode_select.currentIndexChanged.connect(self.user_input)
这会将 QComboBox 更改其选定索引的事件连接到名为 self.user_input 的方法。
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