Question

我想做的是从主窗口菜单中打开一个对话框，在该对话框中，有一些输入，即linetextedit或spinbox或comboboxes ...，还有一个按钮可以关闭对话框并将数据传递到主窗口。在主窗口中，进行了一些操作。在我制作的示例中，操作是将对话框中的两个数字加在一起显示在主窗口中，将txt文件写入本地磁盘，然后使用QDesktopServices打开文件。

即使不是很优雅，我也能做到这一点，但是我发现，即使我使用右上角的'x'来关闭对话框，在对话框中的仍会执行添加和显示以及打开的外部文件< / strong>。我只想将功能链接到按钮，而不是关闭事件。

在这里，我将从ui粘贴转换后的py文件以及主文件。

mainwindowui.py

from PySide2 import QtCore, QtGui, QtWidgets class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName("MainWindow") MainWindow.resize(486, 497) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName("centralwidget") self.gridLayout = QtWidgets.QGridLayout(self.centralwidget) self.gridLayout.setObjectName("gridLayout") self.label = QtWidgets.QLabel(self.centralwidget) self.label.setObjectName("label") self.gridLayout.addWidget(self.label, 0, 0, 1, 1) self.lineEdit = QtWidgets.QLineEdit(self.centralwidget) self.lineEdit.setObjectName("lineEdit") self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 1) MainWindow.setCentralWidget(self.centralwidget) self.menubar = QtWidgets.QMenuBar(MainWindow) self.menubar.setGeometry(QtCore.QRect(0, 0, 486, 22)) self.menubar.setObjectName("menubar") self.menuFile = QtWidgets.QMenu(self.menubar) self.menuFile.setObjectName("menuFile") MainWindow.setMenuBar(self.menubar) self.statusbar = QtWidgets.QStatusBar(MainWindow) self.statusbar.setObjectName("statusbar") MainWindow.setStatusBar(self.statusbar) self.actionOpenLocal = QtWidgets.QAction(MainWindow) self.actionOpenLocal.setObjectName("actionOpenLocal") self.menuFile.addAction(self.actionOpenLocal) self.menubar.addAction(self.menuFile.menuAction()) self.retranslateUi(MainWindow) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): MainWindow.setWindowTitle(QtWidgets.QApplication.translate("MainWindow", "MainWindow", None, -1)) self.label.setText(QtWidgets.QApplication.translate("MainWindow", "Summation", None, -1)) self.menuFile.setTitle(QtWidgets.QApplication.translate("MainWindow", "File", None, -1)) self.actionOpenLocal.setText(QtWidgets.QApplication.translate("MainWindow", "OpenLocal", None, -1))

dialogui.py

from PySide2 import QtCore, QtGui, QtWidgets class Ui_Dialog(object): def setupUi(self, Dialog): Dialog.setObjectName("Dialog") Dialog.resize(320, 237) self.gridLayout = QtWidgets.QGridLayout(Dialog) self.gridLayout.setObjectName("gridLayout") self.labelA = QtWidgets.QLabel(Dialog) self.labelA.setObjectName("labelA") self.gridLayout.addWidget(self.labelA, 0, 0, 1, 1) self.alineEdit = QtWidgets.QLineEdit(Dialog) self.alineEdit.setObjectName("alineEdit") self.gridLayout.addWidget(self.alineEdit, 0, 1, 1, 1) self.labelB = QtWidgets.QLabel(Dialog) self.labelB.setObjectName("labelB") self.gridLayout.addWidget(self.labelB, 1, 0, 1, 1) self.blineEdit = QtWidgets.QLineEdit(Dialog) self.blineEdit.setObjectName("blineEdit") self.gridLayout.addWidget(self.blineEdit, 1, 1, 1, 1) self.pushButton = QtWidgets.QPushButton(Dialog) self.pushButton.setObjectName("pushButton") self.gridLayout.addWidget(self.pushButton, 2, 0, 1, 2) self.retranslateUi(Dialog) QtCore.QMetaObject.connectSlotsByName(Dialog) def retranslateUi(self, Dialog): Dialog.setWindowTitle(QtWidgets.QApplication.translate("Dialog", "Dialog", None, -1)) self.labelA.setText(QtWidgets.QApplication.translate("Dialog", "inputA", None, -1)) self.labelB.setText(QtWidgets.QApplication.translate("Dialog", "inputB", None, -1)) self.pushButton.setText(QtWidgets.QApplication.translate("Dialog", "OpenPdf", None, -1))

和main.py

import sys import os from PySide2 import QtCore, QtGui, QtWidgets from mainwindowui import Ui_MainWindow from dialogui import Ui_Dialog class fileDialog(QtWidgets.QDialog,Ui_Dialog): def __init__(self,parent): super().__init__(parent) self.setupUi(self) self.setWindowTitle("Open File") QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL("clicked()"), self.close) class MainWindow(QtWidgets.QMainWindow,Ui_MainWindow): def __init__(self): super().__init__() self.setupUi(self) self.actionOpenLocal.triggered.connect(self.startDialog) self.show() def startDialog(self): dlg = fileDialog(self) dlg.exec_() dlg.pushButton.clicked.connect(self.getDialogInfo(dlg)) def getDialogInfo(self,dialogue): self.avalue = float(dialogue.alineEdit.text()) self.bvalue = float(dialogue.blineEdit.text()) sum = str(self.avalue+self.bvalue) self.lineEdit.setText(sum) file = open("result.txt","w") file.write(sum) file.close() QtGui.QDesktopServices.openUrl(QtCore.QUrl.fromLocalFile(currentdir +"/result.txt")) if __name__=='__main__': app = QtWidgets.QApplication(sys.argv) currentdir = os.getcwd() mainWin = MainWindow() ret = app.exec_() sys.exit(ret)

如果有人可以纠正似乎不太标准的零件，我也将不胜感激。

Answer 1

您的代码有几个错误：

第dlg.pushButton.clicked.connect(self.getDialogInfo(dlg))行没有意义，让我们分析一下，什么结果self.getDialogInfo(dlg)，函数getDialogInfo执行任务，但不返回等于return的值None，因此初始代码等于dlg.pushButton.clicked.connect(None)，它可以执行您想要的任务，但是不需要连接。
当您调用exec_()时，该对话框将返回一个代码，该代码用于区分是否接受该任务，因为这是对话框的任务。该代码仅在您调用关闭窗口的accept()或reject()方法时返回，因此必须调用close()而不是按钮调用accept()，因此当您关闭窗口时使用X按钮的窗口将在内部调用reject()，因此您可以区分每个按钮。
请勿使用sum，因为sum是函数的名称，并且被视为保留字，否则将来可能会引起问题。
用于打开文件，因为它在退出时会自动关闭。
不要手动连接路径，因为连接取决于平台，因此最好使用库os提供的功能。
使用新的连接语法，更具可读性

考虑到上述情况，可获得以下解决方案：

import os
import sys

from PySide2 import QtCore, QtGui, QtWidgets

from mainwindowui import Ui_MainWindow
from dialogui import Ui_Dialog


class fileDialog(QtWidgets.QDialog, Ui_Dialog):
    def __init__(self,parent):
        super().__init__(parent)
        self.setupUi(self)
        self.setWindowTitle("Open File")
        self.pushButton.clicked.connect(self.accept)


class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.actionOpenLocal.triggered.connect(self.startDialog)
        self.show()

    def startDialog(self):
        dlg = fileDialog(self)
        if dlg.exec_() == QtWidgets.QDialog.Accepted:
            self.getDialogInfo(dlg)

    def getDialogInfo(self, dialogue):
        self.avalue = float(dialogue.alineEdit.text())
        self.bvalue = float(dialogue.blineEdit.text())
        res = str(self.avalue+self.bvalue)
        self.lineEdit.setText(res)
        with open("result.txt","w") as file:
            file.write(res)
        QtGui.QDesktopServices.openUrl(QtCore.QUrl.fromLocalFile(os.path.join(currentdir,"result.txt")))


if __name__=='__main__':
    app = QtWidgets.QApplication(sys.argv)
    currentdir = os.getcwd()
    mainWin = MainWindow()
    ret = app.exec_()
    sys.exit(ret)

Answer 2

您可以使用信号和插槽。

import sys
import os

from PySide2 import QtCore, QtGui, QtWidgets
from mainwindowui import Ui_MainWindow
from dialogui import Ui_Dialog


class fileDialog(QtWidgets.QDialog,Ui_Dialog):
    sig_complete = QtCore.Signal(dict)
    def __init__(self,parent):
        super().__init__(parent)
        self.setupUi(self)
        self.setWindowTitle("Open File")
        QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL("clicked()"), self.slt_save)

    def slt_save(self):
        self.sig_complete.emit({"aline": self.alineEdit.text(), "bline": self.blineEdit.text()})
        self.close()

class MainWindow(QtWidgets.QMainWindow,Ui_MainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.actionOpenLocal.triggered.connect(self.startDialog)
        self.show()

    def startDialog(self):
        dlg = fileDialog(self)
        dlg.sig_complete.connect(self.getDialogInfo)
        dlg.exec_()

    def getDialogInfo(self,data_dict):
        self.avalue = float(data_dict["aline"])
        self.bvalue = float(data_dict["bline"])
        sum = str(self.avalue+self.bvalue)
        self.lineEdit.setText(sum)
        file = open("result.txt","w")
        file.write(sum)
        file.close()
        QtGui.QDesktopServices.openUrl(QtCore.QUrl.fromLocalFile(currentdir +"/result.txt"))


if __name__=='__main__':
    app = QtWidgets.QApplication(sys.argv)
    currentdir = os.getcwd()
    mainWin = MainWindow()
    ret = app.exec_()
    sys.exit(ret)

如何将对话框按钮链接到主窗口功能以及如何使关闭事件与功能分开

2 个答案: