Python 如何使用pyqt4刷新小部件中的内容?
在我的程序中,我从API获取数据。如果有人订购了我希望在我的窗口中看到的数据,而不重新打开应用程序。在这里,当我按下刷新按钮时,我声明了这个函数,我想更新数据,但相同的数据,但当我按下刷新按钮时,相同的数据被添加了两次。下面给出的是我的示例代码,我在这里用字典代替API。如何更新数据Python 如何使用pyqt4刷新小部件中的内容?,python,pyqt4,Python,Pyqt4,在我的程序中,我从API获取数据。如果有人订购了我希望在我的窗口中看到的数据,而不重新打开应用程序。在这里,当我按下刷新按钮时,我声明了这个函数,我想更新数据,但相同的数据,但当我按下刷新按钮时,相同的数据被添加了两次。下面给出的是我的示例代码,我在这里用字典代替API。如何更新数据 from PyQt4 import QtCore, QtGui import sys, collections from functools import partial class InfoWidget(QtGu
from PyQt4 import QtCore, QtGui
import sys, collections
from functools import partial
class InfoWidget(QtGui.QWidget):
clicked = QtCore.pyqtSignal()
def __init__(self, info, parent=None):
super(InfoWidget, self).__init__(parent)
self._info = info
date_label = QtGui.QLabel("{} {}".format(info["Date"], info["Id"]), alignment= QtCore.Qt.AlignCenter, objectName="small")
amount_label = QtGui.QLabel("Amount:{}".format(info["Amount"]))
shopping_label = QtGui.QLabel("Shopping :{}".format(info["Shopping"]))
ordercity_label = QtGui.QLabel("Order City :{}".format(info["Order_City"]))
orderstate_label = QtGui.QLabel("Order State :{}".format(info["Order_State"]))
hline = QtGui.QFrame(frameShape=QtGui.QFrame.HLine)
lay = QtGui.QVBoxLayout(self)
lay.addWidget(date_label)
lay.addWidget(amount_label)
lay.addWidget(shopping_label)
lay.addWidget(ordercity_label)
lay.addWidget(orderstate_label)
lay.addWidget(hline)
@property
def info(self):
return self._info
def mousePressEvent(self, event):
self.clicked.emit()
super(InfoWidget, self).mousePressEvent(event)
class Orders(QtGui.QMainWindow):
def __init__(self, parent=None):
super(Orders, self).__init__(parent)
self.Online_order_dict = [
{"Date" : "jan-24-2019", "Id" : "#175", "Amount" : "191 rs", "Shopping" : "Online", "Order_City" : "Hyderbad", "Order_State" : "TELANGANA"},
{"Date" : "jan-25-2019", "Id" : "#186", "Amount" : "200 Rs", "Shopping" : "Online", "Order_City" : "Hyderbad", "Order_State" : "TELANGANA"},
{"Date" : "jan-29-2019", "Id" : "#188", "Amount" : "250 Rs", "Shopping" : "Online", "Order_City" : "Hyderbad", "Order_State" : "TELANGANA"},
{"Date" : "jan-25-2019", "Id" : "#176", "Amount" : "200 Rs", "Shopping" : "Online", "Order_City" : "Hyderbad", "Order_State" : "TELANGANA"},
{"Date" : "jan-28-2019", "Id" : "#201", "Amount" : "250 Rs", "Shopping" : "Online", "Order_City" : "Hyderbad", "Order_State" : "TELANGANA"}
]
self.qvw1 = QtGui.QWidget()
self.scrollArea = QtGui.QScrollArea(widgetResizable=True)
self.scrollArea.setWidget(self.qvw1)
self.online_order_hbox = QtGui.QVBoxLayout(self.qvw1)
self.online_label = QtGui.QPushButton("Online Order")
self.refreshlabel = QtGui.QPushButton("Refresh")
self.refreshlabel.setStyleSheet("QPushButton{ background-color: #FF8C00; color: white;outline : None;}")
self.refreshlabel.clicked.connect(self.refresh_orders)
self.online_label.setStyleSheet("QPushButton{ background-color: #FF8C00; color: white;outline : None;}")
self.online_order_hbox.addWidget(self.online_label,QtCore.Qt.AlignTop)
self.online_order_hbox.addWidget(self.refreshlabel,QtCore.Qt.AlignBottom)
self.qvw1.setFixedWidth(550)
self.refresh_orders()
def refresh_orders(self):
for i in self.Online_order_dict:
w = InfoWidget(i)
w.clicked.connect(self.on_info_clicked)
self.online_order_hbox.addWidget(w)
self.setCentralWidget(self.scrollArea)
#self.Online_order_dict = self.result_data[1]
# for j in self.Online_order_dict:
# l=j['created'].split("T")
# self.online = {"Date": str(l[0]),"Id" : "#"+str(j['pk']),"Total Amount":str(j['totalAmount']),"Order City":j['billingCity'],"Order State":j['billingState']}
# onlineList.append(self.online)
#
# for index, i in enumerate(onlineList):
# w = InfoWidget1(index, i)
# w.clicked.connect(partial(self.on_info_clicked,"online"))
# self.online_order_hbox.addWidget(w)
@QtCore.pyqtSlot()
def on_info_clicked(self):
w = self.sender()
print(w.info)
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
settingobj= Orders()
settingobj.showFullScreen()
sys.exit(app.exec_())
在这种情况下,最简单的解决方案是在添加新的InfoWidget之前删除InfoWidget,为此,我们可以通过
findChildren()
方法获得它们:
def refresh_orders(self):
for w in self.online_order_hbox.parentWidget().findChildren(InfoWidget):
w.deleteLater()
for i in self.Online_order_dict:
w = InfoWidget(i)
w.clicked.connect(self.on_info_clicked)
self.online_order_hbox.addWidget(w)
self.setCentralWidget(self.scrollArea)
@navyasri问你的问题,尝试没有什么损失。实际上我想每10秒调用一次这个函数,所以我把这个函数放在线程类中,但它显示的错误gui不安全,我可以;我不明白为什么我不能称之为class@navyasri为什么要在一个线程中执行此操作?GUI不能从另一个线程进行修改,您应该做的是通过一个信号将数据发送到GUI线程,在GUI线程中,调用刷新命令method@navyasri如果我的答案有帮助,请不要忘记将我的答案标记为正确,先生,我不想单击另一个按钮查看我的新订单,这就是为什么我想将该函数放入线程,但它不起作用,所以我选择这种方式