事實證明，我在 PyQT5 中為 Qtreewidget 發出信號是一個問題。當您單擊“增加”時，您需要增加 QTreeWidget 的大小，并在再次單擊時減少 QTreeWidget 的大?。ň拖?Excel 中的過濾器），如下所示代碼： self.tree_countries.setGeometry(QRect(1050, 100, 200, 250)) self.tree_countries.setHeaderHidden(True) self.tree_countries.setStyleSheet("QTreeWidget {\n" "border: 1px solid #3b3838;\n" "font: 57 12pt \"Google Sans Medium\";\n" "color: white;\n" "background-color: #3b3838\n" "}\n") sql = filter_sql() parent = QTreeWidgetItem(self.tree_countries) parent.setText(0, "Страна") parent.setFlags(parent.flags() | Qt.ItemIsTristate | Qt.ItemIsUserCheckable) for country in sql.all_countries(): country = str(country) child = QTreeWidgetItem(parent) child.setFlags(child.flags() | Qt.ItemIsUserCheckable) child.setText(0, country[2:-3]) child.setCheckState(0, Qt.Unchecked) self.tree_countries.show()
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TA貢獻1802條經驗 獲得超10個贊
如果您想根據子項是展開還是折疊來更改 QTreeWidget 的高度，則必須使用展開和折疊信號。您還必須計算所需的高度。
from PyQt5 import QtCore, QtWidgets
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super().__init__(parent)
self.tree = QtWidgets.QTreeWidget()
self.tree.header().hide()
root_item = QtWidgets.QTreeWidgetItem(self.tree)
root_item.setText(0, "root")
root_item.setFlags(
root_item.flags() | QtCore.Qt.ItemIsTristate | QtCore.Qt.ItemIsUserCheckable
)
for i in range(10):
child = QtWidgets.QTreeWidgetItem(root_item)
child.setFlags(child.flags() | QtCore.Qt.ItemIsUserCheckable)
child.setText(0, "Child-{}".format(i))
child.setCheckState(0, QtCore.Qt.Unchecked)
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
lay = QtWidgets.QVBoxLayout(central_widget)
lay.addWidget(self.tree)
lay.addStretch(1)
self.tree.collapsed.connect(self.handle_collapsed)
self.tree.expanded.connect(self.handle_expanded)
def handle_collapsed(self, index):
h = self.tree.rowHeight(index) + self.tree.header().height() + 1
self.adjust_height(h)
def handle_expanded(self):
h = self.tree.sizeHint().height()
self.adjust_height(h)
def adjust_height(self, height):
self.tree.setFixedHeight(height)
def showEvent(self, event):
index = self.tree.indexFromItem(self.tree.topLevelItem(0))
if self.tree.isExpanded(index):
QtCore.QTimer.singleShot(0, self.handle_expanded)
else:
QtCore.QTimer.singleShot(
0, lambda index=index: self.handle_collapsed(index)
)
super().showEvent(event)
app = QtWidgets.QApplication([])
w = MainWindow()
w.show()
app.exec_()
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