Question

我制作了一个非常简单的python脚本，将sqlite3数据库读入QtTableWidget。

delimiter = Word(printables, exact=1)
text = Forward() #(Word(printables) + ~delimiter)
def setTextExcludingDelimiter(s,l,t):
    # define Word as all printable characters, excluding the delimiter character
    # the excludeChars argument for Word is how this is done
    text_word = Word(printables, excludeChars=t[0]).setName("text")
    # use '<<' operator to assign the text_word definition to the 
    # previously defined text expression
    text << text_word
# attach parse action to delimiter, so that once it is matched, 
# it will define the correct expression for text
delimiter.setParseAction(setTextExcludingDelimiter)

# make the text expressions Optional with default value of '' to satisfy 3rd test case
parser = delimiter + Optional(text,'') + delimiter + Optional(text,'') + delimiter

工作正常。我现在的问题是：

有没有办法在运行时动态更改窗口标题？

setWindowTitle（）不会动态更新标题栏，也不会更新（）或重绘（）。

非常感谢您宝贵的时间！

Answer 1

另一种解决方案：

class UiDialog(object):
    def setupUi(self, datadb):
        datadb.setObjectName("Dialog")
        datadb.resize(404, 304)
        datadb.setWindowTitle("Database results")
        sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Fixed, QtGui.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(datadb.sizePolicy().hasHeightForWidth())
        datadb.setSizePolicy(sizePolicy)
        datadb.setMinimumSize(QtCore.QSize(404, 304))
        datadb.setMaximumSize(QtCore.QSize(404, 304))
        self.table = QtGui.QTableWidget(datadb)
        self.table.setGeometry(QtCore.QRect(2, 2, 400, 261))
        self.table.setObjectName("table")
        self.show = QtGui.QPushButton(datadb)
        self.show.setGeometry(QtCore.QRect(2, 270, 400, 31))
        self.show.setObjectName("show")
        self.show.setText("Show results")
        QtCore.QObject.connect(self.show, QtCore.SIGNAL("clicked()"), lambda: self.populate(datadb)) ### Using LAMBDA function to pass datadb object to the method
        #self.show.pressed.connect(lambda: self.populate(datadb)) ### Another syntax for the same operation
        QtCore.QMetaObject.connectSlotsByName(datadb)

    def populate(self, mainWindow):
        self.table.setRowCount(len(all_data))
        self.table.setColumnCount(4)
        self.table.setHorizontalHeaderLabels(['Number', 'Keys', 'Time', 'Tries'])
        for i, item in enumerate(all_data):
            number = QtGui.QTableWidgetItem(str(item[0]))
            keys = QtGui.QTableWidgetItem(item[1])
            time = QtGui.QTableWidgetItem(str(item[2]))
            tries = QtGui.QTableWidgetItem(str(item[3]))
            self.table.setItem(i, 0, number)
            self.table.setItem(i, 1, keys)
            self.table.setItem(i, 2, time)
            self.table.setItem(i, 3, tries)
        mainWindow.setWindowTitle("ANOTHER TITLE")

如果您使用.ui文件中生成的代码，则可以将MAIN代码写入另一个文件，然后将生成的ui文件导入MAIN代码，以便将来的更改不会影响或更改您的主要代码代码...所以我选择的最佳解决方案是：

from PyQt4 import QtCore, QtGui
from pyUI import UiDialog ### your UI file, pyUI is the file name and UiDialog is the Ui Class name
import sys

class GUI(QtGui.QDialog):

    def __init__(self):
        QtGui.QDialog.__init__(self)
        self.ui = UiDialog()
        self.ui.setupUi(self)
        self.ui.show.pressed.connect(self.populate)

    def populate(self):
        self.ui.table.setRowCount(len(all_data))
        self.ui.table.setColumnCount(4)
        self.ui.table.setHorizontalHeaderLabels(['Number', 'Keys', 'Time', 'Tries'])
        for i, item in enumerate(all_data):
            number = QtGui.QTableWidgetItem(str(item[0]))
            keys =   QtGui.QTableWidgetItem(item[1])
            time =   QtGui.QTableWidgetItem(str(item[2]))
            tries =  QtGui.QTableWidgetItem(str(item[3]))
            self.ui.table.setItem(i, 0, number)
            self.ui.table.setItem(i, 1, keys)
            self.ui.table.setItem(i, 2, time)
            self.ui.table.setItem(i, 3, tries)
        self.setWindowTitle("ANOTHER TITLE")

con = db.connect('results.db', isolation_level=None)
cur = con.cursor()
cur.execute("SELECT * FROM Results")
all_data = cur.fetchall()

app = QtGui.QApplication(sys.argv)
dailog = GUI()
dailog.show()
sys.exit(app.exec_())

Answer 2

def setupUi(self, datadb):
    [...]
    self.datadb = datadb

def populate(self):
    [...]
    self.datadb.setWindowTitle('new title')

这很有效。但是你正在以一种奇怪而不方便的方式构建你的小部件。更常规的是使用继承：

class DatabaseUi(QtGui.QDialog):
    def __init__(self):
        QtGui.QDialog.__init__(self)

        self.table = QtGui.QTableWidget()

        self.button = QtGui.QPushButton()
        self.button.setText("Show results")
        self.button.clicked.connect(self.populate)

        vlay = QtGui.QVBoxLayout()
        vlay.addWidget(self.table)
        vlay.addWidget(self.button)

        self.setLayout(vlay)
        self.setFixedSize(404, 304)
        self.setWindowTitle("Database results")

    def populate(self):
        self.setWindowTitle('new title')
        self.table.setColumnCount(4)
        self.table.setHorizontalHeaderLabels(['Number', 'Keys', 'Time', 'Tries'])
        [...]


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)

    ui = DatabaseUi()
    ui.show()

    sys.exit(app.exec_())

Answer 3

self.ui.btn_close.clicked.connect（self.btn_close_clicked）

def btn_close_clicked（self）： self.close（）

PyQT动态改变QMainWindow标题

3 个答案: