我有以下玩具界面：from PyQt5 import QtWidgets, QtGui, QtCoreclass MainWindow(QtWidgets.QMainWindow): def __init__(self): super(MainWindow, self).__init__() w = QtWidgets.QWidget() layout = QtWidgets.QVBoxLayout() w.setLayout(layout) self.setCentralWidget(w) my_tree = QtWidgets.QTreeWidget() layout.addWidget(my_tree) alpha = QtWidgets.QTreeWidgetItem(my_tree, ['Alpha']) beta = QtWidgets.QTreeWidgetItem(my_tree, ['Beta']) alpha.addChild(QtWidgets.QTreeWidgetItem(['one'])) alpha.addChild(QtWidgets.QTreeWidgetItem(['two'])) beta.addChild(QtWidgets.QTreeWidgetItem(['first'])) beta.addChild(QtWidgets.QTreeWidgetItem(['second'])) my_tree.expandAll() alpha.child(0).setSelected(True) scroll = QtWidgets.QScrollArea() layout.addWidget(scroll) scrollLayout = QtWidgets.QVBoxLayout() scrollW = QtWidgets.QWidget() scroll.setWidget(scrollW) scrollW.setLayout(scrollLayout) scrollLayout.setAlignment(QtCore.Qt.AlignTop) scroll.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn) scroll.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff) scroll.setWidgetResizable(True) self.show()app = QtWidgets.QApplication([])window = MainWindow()app.exec_()如何使用戶可以選擇和單擊滾動(dòng)區(qū)域中的每個(gè)組？到目前為止，我已嘗試在循環(huán)中添加以下代碼：def onFooGroupClick(): print("Group") fooGroup.clicked.connect(onFooGroupClick)和（根據(jù)這篇文章）：def onFooGroupClick(): print("Group") def f(): return onFooGroupClick()fooGroup.mousePressEvent = f()然而，我所有的努力都沒有成功，我似乎無法讓它發(fā)揮作用。
1 回答
慕標(biāo)5832272
TA貢獻(xiàn)1966條經(jīng)驗(yàn) 獲得超4個(gè)贊
創(chuàng)建一個(gè)繼承自QGroupBox. 在其中定義clicked信號(hào)并覆蓋該mousePressEvent方法。
from PyQt5 import QtWidgets, QtGui, QtCore
class GroupBox(QtWidgets.QGroupBox): # +++ !!!
clicked = QtCore.pyqtSignal(str, object) # +++
def __init__(self, title):
super(GroupBox, self).__init__()
self.title = title
self.setTitle(self.title)
def mousePressEvent(self, event):
child = self.childAt(event.pos())
if not child:
child = self
self.clicked.emit(self.title, child) # +++
class MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
w = QtWidgets.QWidget()
layout = QtWidgets.QVBoxLayout()
w.setLayout(layout)
self.setCentralWidget(w)
my_tree = QtWidgets.QTreeWidget()
layout.addWidget(my_tree)
alpha = QtWidgets.QTreeWidgetItem(my_tree, ['Alpha'])
beta = QtWidgets.QTreeWidgetItem(my_tree, ['Beta'])
alpha.addChild(QtWidgets.QTreeWidgetItem(['one']))
alpha.addChild(QtWidgets.QTreeWidgetItem(['two']))
beta.addChild(QtWidgets.QTreeWidgetItem(['first']))
beta.addChild(QtWidgets.QTreeWidgetItem(['second']))
my_tree.expandAll()
alpha.child(0).setSelected(True)
scroll = QtWidgets.QScrollArea()
layout.addWidget(scroll)
scrollLayout = QtWidgets.QVBoxLayout()
scrollW = QtWidgets.QWidget()
scroll.setWidget(scrollW)
scrollW.setLayout(scrollLayout)
scrollLayout.setAlignment(QtCore.Qt.AlignTop)
scroll.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
scroll.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
scroll.setWidgetResizable(True)
for _ in range(5):
fooGroup = GroupBox(f'GroupBox_{_}') # - QtWidgets.QGroupBox()
fooGroup.setObjectName(f'fooGroup {_}')
fooGroup.clicked.connect(self.onFooGroupClick) # +++
fooLayout = QtWidgets.QVBoxLayout()
fooGroup.setLayout(fooLayout)
fooItem1 = QtWidgets.QLabel("fooItem1", objectName="fooItem1")
fooItem1.setStyleSheet('background: #44ffff')
fooItem2 = QtWidgets.QLabel("fooItem2", objectName="fooItem2")
fooItem2.setStyleSheet('background: #ffff56;')
fooItem3 = QtWidgets.QLabel("fooItem3", objectName="fooItem3")
fooItem3.setStyleSheet('background: #ff42ff;')
fooLayout.addWidget(fooItem1)
fooLayout.addWidget(fooItem2)
fooLayout.addWidget(fooItem3)
scrollLayout.addWidget(fooGroup)
def onFooGroupClick(self, title, obj): # +++
print(f"Group: {title}; objectName=`{obj.objectName()}`")
if __name__ == '__main__':
app = QtWidgets.QApplication([])
window = MainWindow()
window.show()
app.exec_()
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