是否有方法可以将消息从QWidget发送到PySide2中的QStatusBar?当发生某件事时发出消息的方法,另一个对象接收消息并相应地更改消息的方法。
我一直在尝试使用QObject.emit()和QObject.connect()传递字符串并在QStatusBar上显示但没有结果,它们都在不同的类中。
我只使用了发射和连接来进行简单的操作,例如与父窗口一起关闭子窗口,因此,如果发射和连接不是处理此问题的正确方法,请提出另一种传递消息的方法。
import os
import shutil
from PySide2 import QtWidgets
from PySide2.QtCore import SIGNAL, SLOT
class ChildWidget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ChildWidget, self).__init__(parent)
self.initUI()
def initUI(self):
self.setLayout(QtWidgets.QGridLayout())
label_A = QtWidgets.QLabel("Path A: ", self)
self.text_A = QtWidgets.QLineEdit(self)
label_B = QtWidgets.QLabel("Path B: ", self)
self.text_B = QtWidgets.QLineEdit(self)
button_A = QtWidgets.QPushButton("Copy", self)
button_A.clicked.connect(self.copy_function)
self.layout().addWidget(label_A, 0, 0)
self.layout().addWidget(self.text_A, 0, 1)
self.layout().addWidget(label_B, 1, 0)
self.layout().addWidget(self.text_B, 1, 1)
self.layout().addWidget(button_A, 1, 2)
self.layout().setColumnStretch(1, 1)
self.layout().setColumnMinimumWidth(2, 72)
def copy_function(self):
source = self.text_A.text()
destination = self.text_B.text()
self.message = ''; count = 0
file_list = os.listdir(source)
for item in file_list:
count = count + 1
source_path = source +'/'+ item
destination_path = destination +'/'+ item
if os.path.isfile(source_path):
shutil.copyfile(source_path, destination_path)
# message
self.message = 'Transferred {0} out of {1} files...'.format(
count, len(file_list)
)
class ParentWidget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ParentWidget, self).__init__(parent)
self.initUI()
def initUI(self):
self.child = ChildWidget()
self.setLayout(QtWidgets.QGridLayout())
self.status_bar = QtWidgets.QStatusBar(self)
self.status_bar.setSizeGripEnabled(False)
self.h_line = QtWidgets.QFrame(self)
self.h_line.setFrameShape(self.h_line.HLine)
self.h_line.setFrameShadow(self.h_line.Sunken)
# self.status_bar.showMessage(message)
self.layout().addWidget(self.child, 0, 0)
self.layout().addWidget(self.h_line, 1, 0)
self.layout().addWidget(self.status_bar, 2, 0)
self.layout().setContentsMargins(0, 0, 0, 0)
self.setWindowTitle("Copy Window")
self.resize(600, 60)
self.show()
widget_window = ParentWidget()
我在PyQt文档之一中找到了它。这有效。
import os
import shutil
from PySide2 import QtWidgets
from PySide2.QtCore import Signal, Slot
class ChildWidget(QtWidgets.QWidget):
status_update = Signal(str)
def __init__(self, parent=None):
super(ChildWidget, self).__init__(parent)
self.initUI()
def initUI(self):
self.setLayout(QtWidgets.QGridLayout())
label_A = QtWidgets.QLabel("Path A: ", self)
self.text_A = QtWidgets.QLineEdit(self)
label_B = QtWidgets.QLabel("Path B: ", self)
self.text_B = QtWidgets.QLineEdit(self)
button_A = QtWidgets.QPushButton("Copy", self)
button_A.clicked.connect(self.copy_function)
self.layout().addWidget(label_A, 0, 0)
self.layout().addWidget(self.text_A, 0, 1)
self.layout().addWidget(label_B, 1, 0)
self.layout().addWidget(self.text_B, 1, 1)
self.layout().addWidget(button_A, 1, 2)
self.layout().setColumnStretch(1, 1)
self.layout().setColumnMinimumWidth(2, 72)
def copy_function(self):
source = self.text_A.text()
destination = self.text_B.text()
count = 0
file_list = os.listdir(source)
for item in file_list:
count = count + 1
source_path = source +'/'+ item
destination_path = destination +'/'+ item
if os.path.isfile(source_path):
shutil.copyfile(source_path, destination_path)
message = 'Transferred {0} out of {1} files...'.format(
count, len(file_list)
)
self.status_update.emit(message)
class ParentWidget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ParentWidget, self).__init__(parent)
self.initUI()
def initUI(self):
self.child = ChildWidget()
self.setLayout(QtWidgets.QGridLayout())
self.status_bar = QtWidgets.QStatusBar(self)
self.status_bar.setSizeGripEnabled(False)
self.h_line = QtWidgets.QFrame(self)
self.h_line.setFrameShape(self.h_line.HLine)
self.h_line.setFrameShadow(self.h_line.Sunken)
self.child.status_update.connect(self.status_message)
self.layout().addWidget(self.child, 0, 0)
self.layout().addWidget(self.h_line, 1, 0)
self.layout().addWidget(self.status_bar, 2, 0)
self.layout().setContentsMargins(0, 0, 0, 0)
self.setWindowTitle("Copy Window")
self.resize(600, 60)
self.show()
@Slot()
def status_message(self, message):
self.status_bar.showMessage(message)
widget_window = ParentWidget()