我有一个自定义小部件,它有一个与之关联的按钮。有没有办法在单击自定义小部件上的按钮时,我可以找到QListWidget中当前自定义小部件所在的行?
档
main_GUI.朋友
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(353, 237)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.listWidget = QtWidgets.QListWidget(self.centralwidget)
self.listWidget.setObjectName("listWidget")
self.gridLayout.addWidget(self.listWidget, 0, 0, 1, 1)
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setObjectName("pushButton")
self.gridLayout.addWidget(self.pushButton, 1, 0, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 353, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "Add Item"))
custom widget_GUI.朋友
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Table_Widget_Insert(object):
def setupUi(self, Table_Widget_Insert):
Table_Widget_Insert.setObjectName("Table_Widget_Insert")
Table_Widget_Insert.resize(278, 66)
self.horizontalLayout = QtWidgets.QHBoxLayout(Table_Widget_Insert)
self.horizontalLayout.setObjectName("horizontalLayout")
self.label = QtWidgets.QLabel(Table_Widget_Insert)
self.label.setObjectName("label")
self.horizontalLayout.addWidget(self.label)
self.line = QtWidgets.QFrame(Table_Widget_Insert)
self.line.setFrameShape(QtWidgets.QFrame.VLine)
self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
self.line.setObjectName("line")
self.horizontalLayout.addWidget(self.line)
self.pushButton = QtWidgets.QPushButton(Table_Widget_Insert)
self.pushButton.setObjectName("pushButton")
self.horizontalLayout.addWidget(self.pushButton)
self.retranslateUi(Table_Widget_Insert)
QtCore.QMetaObject.connectSlotsByName(Table_Widget_Insert)
def retranslateUi(self, Table_Widget_Insert):
_translate = QtCore.QCoreApplication.translate
Table_Widget_Insert.setWindowTitle(_translate("Table_Widget_Insert", "Form"))
self.label.setText(_translate("Table_Widget_Insert", "TextLabel"))
self.pushButton.setText(_translate("Table_Widget_Insert", "Row Number"))
custom widget.朋友
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from CustomWidget_GUI import *
class SignalsObject(QObject):
listWidgetCurrentIndex = pyqtSignal(str)
class CustomListEntry(QWidget):
def __init__(self, parent=None):
QWidget.__init__(self,parent)
self.CustomUi = Ui_Table_Widget_Insert()
self.CustomUi.setupUi(self)
self.setUpMainUiFunction()
self.signals = SignalsObject()
def setUpMainUiFunction(self):
self.CustomUi.pushButton.clicked.connect(self.rowNumber)
def setlabel(self,label):
self.CustomUi.label.setText(label)
def setButtonName(self,name):
self.CustomUi.pushButton.setObjectName(name)
def rowNumber(self):
sender = self.sender()
name = sender.objectName().split("__")
entryNumber = name[1]
self.signals.listWidgetCurrentIndex.emit(entryNumber)
main.朋友
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from Main_GUI import *
from CustomWidget import *
class MainWindow(QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
QWidget.__init__(self, parent)
self.MainUi = Ui_MainWindow()
self.MainUi.setupUi(self)
self.setUpMainUiFunction()
self.listEntryNumber = 0
def setUpMainUiFunction(self):
self.MainUi.pushButton.clicked.connect(self.addCustomEntry)
def addCustomEntry(self):
self.listEntryNumber = self.listEntryNumber + 1
CustomWidget = CustomListEntry()
CustomWidget.setObjectName("entry"+str(self.listEntryNumber))
CustomWidget.setlabel("Entry Number= "+str(self.listEntryNumber))
CustomWidget.signals.listWidgetCurrentIndex.connect(self.findListIndex)
CustomWidget.setButtonName("button__"+ str(self.listEntryNumber))
myQListWidgetItem = QListWidgetItem(self.MainUi.listWidget)
#pdb.set_trace()
myQListWidgetItem.setSizeHint(CustomWidget.sizeHint())
self.MainUi.listWidget.addItem(myQListWidgetItem)
self.MainUi.listWidget.setItemWidget(myQListWidgetItem, CustomWidget)
def findListIndex(self,entryNumber):
print(entryNumber)
# items = self.MainUi.feederSchedule_listWidget.findItems("entry"+entryNumber,Qt.MatchExactly)
items = self.MainUi.listWidget.findChildren(CustomListEntry,"entry"+entryNumber)
# item = self.MainUi.feederSchedule_listWidget.findItems(items, Qt.MatchRegExp)
if len(items) > 0:
for item in items:
print ("row number of found item =",self.MainUi.listWidget.row(item))
if __name__ == "__main__":
#os.environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1"
app = QtWidgets.QApplication(sys.argv)
MainWindow = MainWindow()
MainWindow.show()
sys.exit(app.exec_())
我可以看到它能够找到QListWidget
中的所有项目,但我似乎无法将我的自定义对象与列出的其中一个匹配。这是我遇到能够找到行的地方。另外在我的实际程序中,我将删除行。条目号必须与行号分开
在这种情况下,最好实现一个允许您获取行的自定义QListWidget,该窗口小部件不应该知道它属于哪一行,但是listwidget应该知道它。
所以我将创建以下是自定义QListWidget,它发出clicked_widget信号,指示发出点击信号的小部件的行号:
click able list widget.朋友
from PyQt5 import QtCore, QtWidgets
class ClickableListWidget(QtWidgets.QListWidget):
clicked_widget = QtCore.pyqtSignal(int)
def append_widget(self, widget_clickable):
item = QtWidgets.QListWidgetItem()
self.addItem(item)
item.setSizeHint(widget_clickable.sizeHint())
self.setItemWidget(item, widget_clickable)
if hasattr(widget_clickable, "clicked"):
if isinstance(widget_clickable.clicked, QtCore.pyqtBoundSignal):
widget_clickable.clicked.connect(self.on_clicked)
@QtCore.pyqtSlot()
def on_clicked(self):
widget = self.sender()
gp = widget.mapToGlobal(QtCore.QPoint())
lp = self.viewport().mapFromGlobal(gp)
item = self.itemAt(lp)
row = self.row(item)
self.clicked_widget.emit(row)
然后修改Main_GUI.py文件以将QListWidget替换为新类:
main_GUI.朋友
from PyQt5 import QtCore, QtGui, QtWidgets
from clickablelistwidget import ClickableListWidget
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(353, 237)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.listWidget = ClickableListWidget(self.centralwidget) # <---
self.listWidget.setObjectName("listWidget")
self.gridLayout.addWidget(self.listWidget, 0, 0, 1, 1)
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setObjectName("pushButton")
self.gridLayout.addWidget(self.pushButton, 1, 0, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 353, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "Add Item"))
您的自定义窗口小部件已修改,以便在按下按钮时发出单击的信号:
custom widget.朋友
import sys
from PyQt5 import QtCore, QtWidgets
from CustomWidget_GUI import Ui_Table_Widget_Insert
class CustomListEntry(QtWidgets.QWidget, Ui_Table_Widget_Insert):
clicked = QtCore.pyqtSignal()
def __init__(self, parent=None):
super(CustomListEntry, self).__init__(parent)
self.setupUi(self)
self.setUpMainUiFunction()
def setUpMainUiFunction(self):
self.pushButton.clicked.connect(self.clicked)
def setlabel(self,label):
self.label.setText(label)
现在它可以在主文件中使用:
main.朋友
import sys
from PyQt5 import QtCore, QtWidgets
from Main_GUI import Ui_MainWindow
from CustomWidget import CustomListEntry
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
self.setUpMainUiFunction()
def setUpMainUiFunction(self):
self.pushButton.clicked.connect(self.addCustomEntry)
self.listWidget.clicked_widget.connect(self.on_clicked_widget)
@QtCore.pyqtSlot()
def addCustomEntry(self):
listEntryNumber = self.listWidget.count()
custom_widget = CustomListEntry()
custom_widget.setlabel("Entry Number= {}".format(listEntryNumber))
self.listWidget.append_widget(custom_widget)
@QtCore.pyqtSlot(int)
def on_clicked_widget(self, row):
print("row number of found item = {}".format(row))
if __name__ == "__main__":
#os.environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1"
app = QtWidgets.QApplication(sys.argv)
MainWindow = MainWindow()
MainWindow.show()
sys.exit(app.exec_())
最后,您的文件夹必须具有以下结构:
├── clickablelistwidget.py
├── CustomListWidget.py
├── CustomWidget_GUI.py
├── CustomWidget.py
├── Main_GUI.py
└── Main.py
这种方法的优点是它可以解耦类,使其易于重用。如果我们有许多类型的小部件,您不必诉诸于objectName或将QListWidgetItem注入到可能很乏味的小部件中。 :-)。