问题描述
关于@ekhumoro的answer和@ Oak_3260548和@eyllanesc的modification非常好，我想首先拥有一个普通视图，该视图在QHeaderView下面没有过滤器，并且有一个用于激活（显示）过滤器的按钮：
单击“过滤器”按钮（具有属性button.setCheckable（True））后，我要获取：
注意：按下“过滤器”按钮。现在，当我再次单击“过滤器”按钮（将其取消按下）时，我希望QHeaderView下带有过滤器的行消失：
我该怎么做，换句话说，如何使QTableView的QHeaderView成为旧的普通的？在应用程序中具有这种功能非常方便，用户可以在需要时使用按钮（或任何其他方式）在QHeaderView下面的过滤器行之间切换。该应用程序的行为是在未按下按钮且过滤器行消失时取消视图中的所有过滤器，但这对这个问题并不重要。
修改： 这是MRE：
import sys
from PyQt5.QtCore import pyqtSignal,Qt
from PyQt5.QtGui import QStandardItemmodel,QStandardItem
from PyQt5.QtWidgets import (
QHeaderView,QWidget,QLineEdit,QApplication,QTableView,QVBoxLayout,QHBoxLayout,QComboBox,QPushButton,QCheckBox,QMessageBox,)
class Widget(QWidget):
def __init__(self,parent=None):
super().__init__(parent)
self.btn = QPushButton()
self.btn.setText("=")
self.btn.setFixedWidth(20)
self.linee = QLineEdit()
self.linee.setPlaceholderText("Filter")
lay = QHBoxLayout(self)
lay.setContentsMargins(0,0)
lay.setSpacing(0)
lay.addWidget(self.btn)
lay.addWidget(self.linee)
class FilterHeader(QHeaderView):
filteractivated = pyqtSignal()
def __init__(self,parent):
super().__init__(Qt.Horizontal,parent)
self._editors = []
self._padding = 4
self.setStretchLastSection(True)
# self.setResizeMode(QHeaderView.Stretch)
self.setDefaultAlignment(Qt.AlignLeft | 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 = self.create_editor(self.parent(),index)
self._editors.append(editor)
self.adjustPositions()
def create_editor(self,parent,index):
if index == 1: # Empty
editor = QWidget()
elif index == 2: # Number filter (>|=|<)
editor = Widget(parent)
editor.linee.returnpressed.connect(self.filteractivated)
editor.btn.clicked.connect(self.changebuttonsymbol)
elif index == 3:
editor = QComboBox(parent)
editor.addItems(["","Combo","One","Two","Three"])
editor.currentIndexChanged.connect(self.filteractivated)
elif index == 4:
editor = QPushButton(parent)
editor.clicked.connect(self.filteractivated)
editor.setText("Button")
elif index == 5:
editor = QCheckBox(parent)
editor.clicked.connect(self.filteractivated)
editor.setTristate(True)
editor.setCheckState(Qt.Checked)
editor.setText("CheckBox")
else:
editor = QLineEdit(parent)
editor.setPlaceholderText("Filter")
editor.returnpressed.connect(self.filteractivated)
return editor
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,height + self._padding)
else:
self.setViewportMargins(0,0)
super().updateGeometries()
self.adjustPositions()
def adjustPositions(self):
for index,editor in enumerate(self._editors):
if not isinstance(editor,QWidget):
continue
height = editor.sizeHint().height()
compensate_y = 0
compensate_x = 0
if type(editor) is QComboBox:
compensate_y = +2
elif type(editor) in (QWidget,Widget):
compensate_y = -1
elif type(editor) is QPushButton:
compensate_y = -1
elif type(editor) is QCheckBox:
compensate_y = 4
compensate_x = 4
editor.move(
self.sectionPosition(index) - self.offset() + 1 + compensate_x,height + (self._padding // 2) + 2 + compensate_y,)
editor.resize(self.sectionSize(index),height)
def filterText(self,index):
for editor in self._editors:
if hasattr(editor,"text") and callable(editor.text):
return editor.text()
return ""
def setFilterText(self,index,text):
for editor in self._editors:
if hasattr(editor,"setText") and callable(editor.setText):
editor.setText(text)
def clearFilters(self):
for editor in self._editors:
editor.clear()
def changebuttonsymbol(self):
nbtn = self.sender()
if nbtn.text() == "=":
nbtn.setText(">")
elif nbtn.text() == ">":
nbtn.setText("<")
else:
nbtn.setText("=")
class Window(QWidget):
def __init__(self):
super(Window,self).__init__()
self.filter_button = QPushButton("Filter")
self.filter_button.setCheckable(True)
self.filter_button.setChecked(True)
self.filter_button.clicked.connect(self.on_button_clicked)
self.view = QTableView()
self.view.horizontalHeader().setStretchLastSection(True)
button_layout = QHBoxLayout()
button_layout.addStretch()
button_layout.addWidget(self.filter_button)
layout = QVBoxLayout(self)
layout.addLayout(button_layout)
layout.addWidget(self.view)
header = FilterHeader(self.view)
self.view.setHorizontalHeader(header)
self.view.verticalHeader().setVisible(False)
#model = QStandardItemmodel(self.view)
model = QStandardItemmodel(5,7,self.view)
for i in range(5):
for j in range(7):
item = QStandardItem(str(i+j))
model.setItem(i,j,item)
model.setHorizontalHeaderLabels("One Two Three Four Five Six Seven".split())
self.view.setModel(model)
header.setFilterBoxes(model.columnCount())
header.filteractivated.connect(self.handleFilteractivated)
def handleFilteractivated(self):
header = self.view.horizontalHeader()
print()
for index in range(header.count()):
if index != 4:
print(index,header.filterText(index))
else:
print("Button")
def on_button_clicked(self):
if self.filter_button.isChecked():
QMessageBox.information(None,"","Now I want the row with filters below the QHeaderView to appear again.")
else:
QMessageBox.information(None,"Now I want the row with filters below the QHeaderView to disappear.")
if __name__ == "__main__":
app = QApplication(sys.argv)
window = Window()
#window.setGeometry(800,100,600,300)
window.resize(950,220)
window.show()
sys.exit(app.exec_())
编辑：可接受的解决方案在许多情况下都可以正常工作，但是在某些情况下，当关闭窗口时，它冻结了GUI，所以我找到了一种解决方法：
def closeEvent(self,event):
self.view.horizontalHeader().visible_editors = False
解决方法
您必须创建一个处理编辑器可见性的属性：
class FilterHeader(QHeaderView):
filterActivated = pyqtSignal()
def __init__(self,parent):
super().__init__(Qt.Horizontal,parent)
self._visible_editors = False
self._editors = []
self._padding = 4
self.setStretchLastSection(True)
# self.setResizeMode(QHeaderView.Stretch)
self.setDefaultAlignment(Qt.AlignLeft | Qt.AlignVCenter)
self.setSortIndicatorShown(False)
self.sectionResized.connect(self.adjustPositions)
parent.horizontalScrollBar().valueChanged.connect(self.adjustPositions)
@property
def visible_editors(self):
return self._visible_editors
@visible_editors.setter
def visible_editors(self,is_visible):
self._visible_editors = is_visible
for editor in self._editors:
editor.setVisible(self.visible_editors)
self.updateGeometries()
def setFilterBoxes(self,count):
while self._editors:
editor = self._editors.pop()
editor.deleteLater()
for index in range(count):
editor = self.create_editor(self.parent(),index)
editor.setVisible(self.visible_editors)
self._editors.append(editor)
self.adjustPositions()
def create_editor(self,parent,index):
if index == 1: # Empty
editor = QWidget()
elif index == 2: # Number filter (>|=|<)
editor = Widget(parent)
editor.linee.returnPressed.connect(self.filterActivated)
editor.btn.clicked.connect(self.changebuttonsymbol)
elif index == 3:
editor = QComboBox(parent)
editor.addItems(["","Combo","One","Two","Three"])
editor.currentIndexChanged.connect(self.filterActivated)
elif index == 4:
editor = QPushButton(parent)
editor.clicked.connect(self.filterActivated)
editor.setText("Button")
elif index == 5:
editor = QCheckBox(parent)
editor.clicked.connect(self.filterActivated)
editor.setTristate(True)
editor.setCheckState(Qt.Checked)
editor.setText("CheckBox")
else:
editor = QLineEdit(parent)
editor.setPlaceholderText("Filter")
editor.returnPressed.connect(self.filterActivated)
return editor
def sizeHint(self):
size = super().sizeHint()
if self._editors and self.visible_editors:
height = self._editors[0].sizeHint().height()
size.setHeight(size.height() + height + self._padding)
return size
def updateGeometries(self):
if self._editors and self.visible_editors:
height = self._editors[0].sizeHint().height()
self.setViewportMargins(0,height + self._padding)
else:
self.setViewportMargins(0,0)
super().updateGeometries()
self.adjustPositions()
def adjustPositions(self):
for index,editor in enumerate(self._editors):
if not isinstance(editor,QWidget):
continue
height = editor.sizeHint().height()
compensate_y = 0
compensate_x = 0
if type(editor) is QComboBox:
compensate_y = +2
elif type(editor) in (QWidget,Widget):
compensate_y = -1
elif type(editor) is QPushButton:
compensate_y = -1
elif type(editor) is QCheckBox:
compensate_y = 4
compensate_x = 4
editor.move(
self.sectionPosition(index) - self.offset() + 1 + compensate_x,height + (self._padding // 2) + 2 + compensate_y,)
editor.resize(self.sectionSize(index),height)
def filterText(self,index):
for editor in self._editors:
if hasattr(editor,"text") and callable(editor.text):
return editor.text()
return ""
def setFilterText(self,index,text):
for editor in self._editors:
if hasattr(editor,"setText") and callable(editor.setText):
editor.setText(text)
def clearFilters(self):
for editor in self._editors:
editor.clear()
def changebuttonsymbol(self):
nbtn = self.sender()
if nbtn.text() == "=":
nbtn.setText(">")
elif nbtn.text() == ">":
nbtn.setText("<")
else:
nbtn.setText("=")
class Window(QWidget):
def __init__(self):
super(Window,self).__init__()
self.filter_button = QPushButton("Filter")
self.filter_button.setCheckable(True)
self.filter_button.setChecked(True)
self.filter_button.clicked.connect(self.on_button_clicked)
self.view = QTableView()
self.view.horizontalHeader().setStretchLastSection(True)
button_layout = QHBoxLayout()
button_layout.addStretch()
button_layout.addWidget(self.filter_button)
layout = QVBoxLayout(self)
layout.addLayout(button_layout)
layout.addWidget(self.view)
header = FilterHeader(self.view)
self.view.setHorizontalHeader(header)
self.view.verticalHeader().setVisible(False)
# model = QStandardItemModel(self.view)
model = QStandardItemModel(5,7,self.view)
for i in range(5):
for j in range(7):
item = QStandardItem(str(i + j))
model.setItem(i,j,item)
model.setHorizontalHeaderLabels("One Two Three Four Five Six Seven".split())
self.view.setModel(model)
header.setFilterBoxes(model.columnCount())
header.filterActivated.connect(self.handleFilterActivated)
self.on_button_clicked()
def handleFilterActivated(self):
header = self.view.horizontalHeader()
for index in range(header.count()):
if index != 4:
print(index,header.filterText(index))
else:
print("Button")
def on_button_clicked(self):
self.view.horizontalHeader().visible_editors = self.filter_button.isChecked()