我有一个QTreeView，它显示来自SQLite数据库的数据。 QTreeView启用了过滤器和排序。为了进行过滤，我在列标题中显示了QLineEdit。
问题：为了启用QLineEdit过滤，列布局似乎已通过修改而固定。
问题：是否有一种方法可以重新启用列布局的设置-通过拖动列，就像在标准QTreeView布局中一样。
我希望用户能够以所需的方式重新排列他的列。
完整的工作代码示例：
import sys
import re
from PyQt5 import QtWidgets, QtGui, QtCore, QtSql
COUNT_PERS_COLS = 3
col_persID, col_persLAST_NAME, col_persFIRST_NAME = range(COUNT_PERS_COLS)
db = QtSql.QSqlDatabase.addDatabase("QSQLITE")
db.setDatabaseName(':memory:')
modelQuery = QtSql.QSqlQueryModel()
modelTable = QtSql.QSqlRelationalTableModel()
def _human_key(key):
parts = re.split(r'(\d*\.\d+|\d+)', key)
return tuple((e.swapcase() if i % 2 == 0 else float(e))
for i, e in enumerate(parts))
class FilterHeader(QtWidgets.QHeaderView):
filterActivated = QtCore.pyqtSignal()
def __init__(self, parent):
super().__init__(QtCore.Qt.Horizontal, parent)
self._editors = []
self._padding = 4
self.setStretchLastSection(True)
self.setSectionResizeMode(QtWidgets.QHeaderView.Stretch)
self.setDefaultAlignment(QtCore.Qt.AlignLeft | QtCore.Qt.AlignVCenter)
self.setSortIndicatorShown(False)
self.sectionResized.connect(self.adjustPositions)
parent.horizontalScrollBar().valueChanged.connect(self.adjustPositions)
def setFilterBoxes(self, count):
while self._editors:
editor = self._editors.pop()
editor.deleteLater()
for index in range(count):
editor = QtWidgets.QLineEdit(self.parent())
editor.setPlaceholderText('Filter')
editor.setClearButtonEnabled(True)
editor.returnPressed.connect(self.filterActivated.emit)
self._editors.append(editor)
self.adjustPositions()
def sizeHint(self):
size = super().sizeHint()
if self._editors:
height = self._editors[0].sizeHint().height()
size.setHeight(size.height() + height + self._padding)
return size
def updateGeometries(self):
if self._editors:
height = self._editors[0].sizeHint().height()
self.setViewportMargins(0, 0, 0, height + self._padding)
else:
self.setViewportMargins(0, 0, 0, 0)
super().updateGeometries()
self.adjustPositions()
def adjustPositions(self):
for index, editor in enumerate(self._editors):
height = editor.sizeHint().height()
editor.move(
self.sectionPosition(index) - self.offset() + 2,
height + (self._padding // 2))
editor.resize(self.sectionSize(index), height)
def filterText(self, index):
if 0 <= index < len(self._editors):
return self._editors[index].text()
return ''
def setFilterText(self, index, text):
if 0 <= index < len(self._editors):
self._editors[index].setText(text)
def clearFilters(self):
for editor in self._editors:
editor.clear()
class HumanProxyModel(QtCore.QSortFilterProxyModel):
def lessThan(self, source_left, source_right):
data_left = source_left.data()
data_right = source_right.data()
if type(data_left) == type(data_right) == str:
return _human_key(data_left) < _human_key(data_right)
return super(HumanProxyModel, self).lessThan(source_left, source_right)
@property
def filters(self):
if not hasattr(self, "_filters"):
self._filters = []
return self._filters
@filters.setter
def filters(self, filters):
print(f"filters() called.")
self._filters = filters
self.invalidateFilter()
def filterAcceptsRow(self, sourceRow, sourceParent):
for i, text in self.filters:
if 0 <= i < self.columnCount():
ix = self.sourceModel().index(sourceRow, i, sourceParent)
data = ix.data()
if text not in data:
return False
return True
class winMain(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super().__init__(parent)
self.setupUi()
self.setGeometry(300,200,700,500)
self.show()
def createPersonModel(self,parent):
model = QtGui.QStandardItemModel(0, COUNT_PERS_COLS, parent)
model.setHorizontalHeaderLabels(['ID', 'Last Name', 'First Name'])
return model
def addPerson(self, model, id, last_name, first_name):
model.insertRow(0)
model.setData(model.index(0, col_persID), id)
model.setData(model.index(0, col_persLAST_NAME), last_name)
model.setData(model.index(0, col_persFIRST_NAME), first_name)
def handleFilterActivated(self):
header = self.treeView.header()
filters = []
for i in range(header.count()):
text = header.filterText(i)
if text:
filters.append((i, text))
proxy = self.treeView.model()
proxy.filters = filters
def setupUi(self):
self.centralwidget = QtWidgets.QWidget(self)
self.horizontalLayout = QtWidgets.QHBoxLayout(self.centralwidget)
self.treeView = QtWidgets.QTreeView(self.centralwidget)
self.treeView.setSortingEnabled(True)
self.treeView.setAlternatingRowColors(True)
self.treeView.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.treeView.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
self.treeView.setAnimated(True)
self.treeView.setItemsExpandable(True)
self.horizontalLayout.addWidget(self.treeView)
self.setCentralWidget(self.centralwidget)
header = FilterHeader(self.treeView)
self.treeView.setHeader(header)
self.statusBar = QtWidgets.QStatusBar()
self.setStatusBar(self.statusBar)
modelTable.setTable("person")
self.treeView.setModel(modelTable)
proxy = HumanProxyModel(self)
proxy.setSourceModel(modelTable)
self.treeView.setModel(proxy)
header.setFilterBoxes(modelTable.columnCount())
header.filterActivated.connect(self.handleFilterActivated)
def create_sample_data():
modelQuery.setQuery("""CREATE TABLE IF NOT EXISTS country (
id INTEGER PRIMARY KEY UNIQUE NOT NULL,
name TEXT
)""")
modelQuery.setQuery("""CREATE TABLE IF NOT EXISTS person (
id INTEGER PRIMARY KEY UNIQUE NOT NULL,
persId TEXT,
lastName TEXT,
firstName TEXT,
country_id INTEGER NOT NULL DEFAULT 3,
FOREIGN KEY (country_id) REFERENCES country(id)
)""")
modelQuery.setQuery("INSERT INTO country (id, name) VALUES (0, 'None')")
modelQuery.setQuery("INSERT INTO country (id, name) VALUES (1, 'Angola')")
modelQuery.setQuery("INSERT INTO country (id, name) VALUES (2, 'Serbia')")
modelQuery.setQuery("INSERT INTO country (id, name) VALUES (3, 'Georgia')")
modelQuery.setQuery("INSERT INTO person (id, persId, lastName, firstName, country_id) VALUES (1, '1001', 'Martin', 'Robert', 1)")
modelQuery.setQuery("INSERT INTO person (id, persId, lastName, firstName, country_id) VALUES (2, '1002', 'Smith', 'Brad', 2)")
modelQuery.setQuery("INSERT INTO person (id, persId, lastName, firstName, country_id) VALUES (3, '1003', 'Smith', 'Angelina', 3)")
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
create_sample_data()
window = winMain()
sys.exit(app.exec_())
答案 0 :(得分：0)
您必须使用setSectionsMovable()的QHeaderView方法启用该功能：
class FilterHeader(QtWidgets.QHeaderView):
filterActivated = QtCore.pyqtSignal()
def __init__(self, parent):
super().__init__(QtCore.Qt.Horizontal, parent)
self.setSectionsMovable(True) # <---
# ...