使用QThread定期更新QTableWidget pyqt

Question

在我的应用程序中,我使用API​​调用获取记录,然后我动态地将数据添加到QTableWidget.到目前为止,这是我的代码片段:

class TriageUI(QtGui.QMainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        self.ui = Ui_TriageWindow()
        self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)
        self.move(QtGui.QApplication.desktop().screen().rect().center()- self.rect().center())
        self.ui.setupUi(self)
        self.update_records()        

    def update_records(self):
        #items are the results from the API fetch
        items = json.loads(get_triage_queue(COOKIES, SERVER, PORT))
        rows = len(items['objects'])
        self.ui.tableWidget.setColumnCount(5)
        self.ui.tableWidget.setRowCount(rows)
        index = 0
        column = 0
        for j in items['objects']:
            for key, value in j.iteritems():
                f = QtGui.QTableWidgetItem(str(value))
                self.ui.tableWidget.setItem(index, column, QtGui.QTableWidgetItem(f))
                column = column + 1

但是,我希望能够定期(例如15秒后)对数据进行API调用,然后将结果中的任何新数据项添加到表中.我怎样才能做到这一点.

先感谢您.

Answer 1

这里有一个使用a对类成员函数(可能是你的update_records函数)进行重复调用的例子PyQt4.QtCore.QTimer.有时问题的解决方案比我们想象的更容易.

注意功能start和stop.此功能使您可以随意启动和停止计时器.

from PyQt4 import QtGui as gui
from PyQt4 import QtCore as core


class Blinker(gui.QWidget):
    def __init__(self, parent=None):
        super(Blinker, self).__init__(parent)

        self.label = gui.QLabel(self)
        self.label.setFixedSize(200, 200)
        self.layout = gui.QHBoxLayout(self)
        self.layout.addWidget(self.label)

        self.timer  = core.QTimer(self)
        self.timer.setInterval(1000)          # Throw event timeout with an interval of 1000 milliseconds
        self.timer.timeout.connect(self.blink) # each time timer counts a second, call self.blink
        self.color_flag = True

    def start(self):
        self.timer.start()

    def stop(self):
        self.timer.stop()

    @core.pyqtSlot()
    def blink(self):
        if self.color_flag:
            self.label.setStyleSheet("background-color: blue;")
        else:
            self.label.setStyleSheet("background-color: yellow;")
        self.color_flag = not self.color_flag


if __name__ == '__main__':
    import sys
    app = gui.QApplication(sys.argv)

    w = Blinker()
    w.show()
    w.start()

    sys.exit(app.exec_())