如何在没有可见空白的情况下扩展/减少 QTable View space
how to expand /decrease QTable View without visible blank white space
我有一个子类 QAbstractTableModel
以全尺寸显示 Table 视图中的数据而不滚动我已经关闭了滚动条
为了去除 Table 视图周围的白色 space，我已将 vertical/horizontal table 长度设置为特定值。
问题是
我已经向模型添加了一个 add/deleate 行方法，所以现在 Table 视图 expands/shrinks
调整 Table 查看行为以全尺寸显示数据且没有白色 space 我已将水平 Header 设置为
table_view.horizontalHeader().setStretchLastSection(True)
正确切断水平方向的白色 space
对白色 space 的垂直 header 切割也进行相同的操作，但过度拉伸最后一行
我尝试使用
将每一行设置为默认大小
table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
table_view.verticalHeader().setDefaultSectionSize(40)
但这会再次打开白色 space
简而言之：我正在寻找一种在 Table 全尺寸视图中显示模型数据的方法，没有白色 Space 同时能够 deleate/insert 一行
代码示例
#!/usr/bin/env python
"""
"""
import sys
import re
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5.QtCore import Qt
from PyQt5 import QtGui as qtg
class ViewModel(qtc.QAbstractTableModel):
def __init__(self, input_data=None):
super().__init__()
self.input_data = input_data or [["data","data","data","data"],["data","data","data","data"]]
#
def data(self, index, role): # parameter index, role are needed !
"""
"""
if role == qtc.Qt.DisplayRole:
try:
text = self.input_data[index.row()][index.column()]
except IndexError:
text = None
return text
def rowCount(self, index=qtc.QModelIndex()):
return 0 if index.isValid() else len(self.input_data)
def columnCount(self, index):
return len(self.input_data[0])
def insertRows(self, position, rows, parent=qtc.QModelIndex()):
print(position) # -1
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end <= 8:
self.beginInsertRows(parent, start, end)
self.input_data.append([])
self.endInsertRows()
return True
else:
return False
def removeRows(self, position, rows, parent=qtc.QModelIndex()):
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end >= 1:
self.beginRemoveRows(parent, start, end)
del self.input_data[start:end + 1]
self.endRemoveRows()
return True
else:
return False
def headerData(self, section, orientation, role):
if role == qtc.Qt.DisplayRole:
if orientation == qtc.Qt.Horizontal:
return "hight " + str(section+1) + " /mm"
if orientation == qtc.Qt.Vertical:
return "width " + str(section+1)
def flags(self, index):
return qtc.Qt.ItemIsEditable | qtc.Qt.ItemIsSelectable | qtc.Qt.ItemIsEnabled
def setData(self, index, value, role=qtc.Qt.EditRole):
if role == qtc.Qt.EditRole:
try:
row = index.row()
column = index.column()
pattern = '^[\d]+(?:,[\d]+)?$'
if re.fullmatch(pattern, value, flags=0):
print("true")
self.input_data[row][column] = value # float
else:
print("nope")
pass
return True
except ValueError:
print("not a number")
return False
def display_model_data(self):
print(self.input_data)
class MainWindow(qtw.QWidget):
def __init__(self):
super().__init__()
# geometry
self.setGeometry(900, 360, 700, 800)
# View
table_view = qtw.QTableView()
# done # turn scroll bars off
table_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
table_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.model = ViewModel()
table_view.setModel(self.model)
table_view.horizontalHeader().setStretchLastSection(True)
# table_view.verticalHeader().setStretchLastSection(True)
table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
table_view.verticalHeader().setDefaultSectionSize(24)
table_view.verticalHeader().setStretchLastSection(True)
# verticalHeader->setSectionResizeMode(QHeaderView::Fixed);
# verticalHeader->setDefaultSectionSize(24);
# widgets
self.insert_row_button = qtw.QPushButton("insert row")
self.deleate_row_button = qtw.QPushButton("deleate row")
# layout
layout = qtw.QVBoxLayout()
layout.addWidget(table_view)
layout.addWidget(self.insert_row_button)
layout.addWidget(self.deleate_row_button)
self.setLayout(layout)
self.show()
# function
self.insert_row_button.clicked.connect(lambda: self.model.insertRows(-1, 1))
self.deleate_row_button.clicked.connect(lambda: self.model.removeRows(-1, 1))
if __name__ == '__main__':
app = qtw.QApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())
space 不能神奇地消失。假设总 table 高度是 600。如果 table 中有两行，第一行是 40。那么，如果你不想的话，第二行是 600 - 40 = 560' table 底部空白。如果将每行的高度设置为 40，则空白 space 的高度将为 600 - 2 * 40 = 520。你不能要求（总高度 600）+（两行，每行 40） +（底部没有空格 space）。
所以，我猜，你要(a.底部没有空白space)+(b,space平分行，这样最后一行就不会看起来很奇怪。）。如果是这样的话，我已经将你的代码编辑到下面，解释了一切：
"""
"""
import sys
import re
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5.QtCore import Qt
from PyQt5 import QtGui as qtg
class ViewModel(qtc.QAbstractTableModel):
def __init__(self, input_data=None):
super().__init__()
self.input_data = input_data or [["data","data","data","data"],["data","data","data","data"]]
#
def data(self, index, role): # parameter index, role are needed !
"""
"""
if role == qtc.Qt.DisplayRole:
try:
text = self.input_data[index.row()][index.column()]
except IndexError:
text = None
return text
def rowCount(self, index=qtc.QModelIndex()):
return 0 if index.isValid() else len(self.input_data)
def columnCount(self, index):
return len(self.input_data[0])
def insertRows(self, position, rows, parent=qtc.QModelIndex()):
print(position) # -1
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end <= 8:
self.beginInsertRows(parent, start, end)
self.input_data.append([])
self.endInsertRows()
return True
else:
return False
def removeRows(self, position, rows, parent=qtc.QModelIndex()):
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end >= 1:
self.beginRemoveRows(parent, start, end)
del self.input_data[start:end + 1]
self.endRemoveRows()
return True
else:
return False
def headerData(self, section, orientation, role):
if role == qtc.Qt.DisplayRole:
if orientation == qtc.Qt.Horizontal:
return "hight " + str(section+1) + " /mm"
if orientation == qtc.Qt.Vertical:
return "width " + str(section+1)
def flags(self, index):
return qtc.Qt.ItemIsEditable | qtc.Qt.ItemIsSelectable | qtc.Qt.ItemIsEnabled
def setData(self, index, value, role=qtc.Qt.EditRole):
if role == qtc.Qt.EditRole:
try:
row = index.row()
column = index.column()
pattern = '^[\d]+(?:,[\d]+)?$'
if re.fullmatch(pattern, value, flags=0):
print("true")
self.input_data[row][column] = value # float
else:
print("nope")
pass
return True
except ValueError:
print("not a number")
return False
def display_model_data(self):
print(self.input_data)
class NoBlankSpaceAtBottomEnvenlySplitTableView(qtw.QTableView):
def sizeHintForRow(self, row):
row_count = self.model().rowCount()
height = self.viewport().height()
row_height = int(height/row_count)
if row < row_count - 1:
return row_height
else:
return super().sizeHintForRow(row)
class MainWindow(qtw.QWidget):
def __init__(self):
super().__init__()
# geometry
self.setGeometry(900, 360, 700, 800)
# View
# table_view = qtw.QTableView()
table_view = NoBlankSpaceAtBottomEnvenlySplitTableView()
# done # turn scroll bars off
table_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
table_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.model = ViewModel()
table_view.setModel(self.model)
table_view.horizontalHeader().setStretchLastSection(True)
table_view.verticalHeader().setStretchLastSection(True)
# table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
#table_view.verticalHeader().setDefaultSectionSize(24)
table_view.verticalHeader().setSectionResizeMode(
qtw.QHeaderView.ResizeToContents) # Add this line
table_view.verticalHeader().setStretchLastSection(True)
# verticalHeader->setSectionResizeMode(QHeaderView::Fixed);
# verticalHeader->setDefaultSectionSize(24);
# widgets
self.insert_row_button = qtw.QPushButton("insert row")
self.deleate_row_button = qtw.QPushButton("deleate row")
# layout
layout = qtw.QVBoxLayout()
layout.addWidget(table_view)
layout.addWidget(self.insert_row_button)
layout.addWidget(self.deleate_row_button)
self.setLayout(layout)
self.show()
# function
self.insert_row_button.clicked.connect(lambda: self.model.insertRows(-1, 1))
self.deleate_row_button.clicked.connect(lambda: self.model.removeRows(-1, 1))
if __name__ == '__main__':
app = qtw.QApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())
编辑：Table 根据行数自动调整高度
import sys
import re
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5.QtCore import Qt, QSize
from PyQt5.QtWidgets import QSizePolicy
from PyQt5 import QtGui as qtg
class ViewModel(qtc.QAbstractTableModel):
def __init__(self, input_data=None):
super().__init__()
self.input_data = input_data or [["data","data","data","data"],["data","data","data","data"]]
#
def data(self, index, role): # parameter index, role are needed !
"""
"""
if role == qtc.Qt.DisplayRole:
try:
text = self.input_data[index.row()][index.column()]
except IndexError:
text = None
return text
def rowCount(self, index=qtc.QModelIndex()):
return 0 if index.isValid() else len(self.input_data)
def columnCount(self, index):
return len(self.input_data[0])
def insertRows(self, position, rows, parent=qtc.QModelIndex()):
print(position) # -1
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end <= 8:
self.beginInsertRows(parent, start, end)
self.input_data.append([])
self.endInsertRows()
return True
else:
return False
def removeRows(self, position, rows, parent=qtc.QModelIndex()):
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end >= 1:
self.beginRemoveRows(parent, start, end)
del self.input_data[start:end + 1]
self.endRemoveRows()
return True
else:
return False
def headerData(self, section, orientation, role):
if role == qtc.Qt.DisplayRole:
if orientation == qtc.Qt.Horizontal:
return "hight " + str(section+1) + " /mm"
if orientation == qtc.Qt.Vertical:
return "width " + str(section+1)
def flags(self, index):
return qtc.Qt.ItemIsEditable | qtc.Qt.ItemIsSelectable | qtc.Qt.ItemIsEnabled
def setData(self, index, value, role=qtc.Qt.EditRole):
if role == qtc.Qt.EditRole:
try:
row = index.row()
column = index.column()
pattern = '^[\d]+(?:,[\d]+)?$'
if re.fullmatch(pattern, value, flags=0):
print("true")
self.input_data[row][column] = value # float
else:
print("nope")
pass
return True
except ValueError:
print("not a number")
return False
def display_model_data(self):
print(self.input_data)
class AutoExpandingTableView(qtw.QTableView):
# def sizeHintForRow(self, row):
# row_count = self.model().rowCount()
# height = self.viewport().height()
# row_height = int(height/row_count)
# if row < row_count - 1:
# return row_height
# else:
# return super().sizeHintForRow(row)
def sizeHint(self):
viewport_size_hint = self.viewportSizeHint()
return QSize(
self.width(),
viewport_size_hint.height()
)
class MainWindow(qtw.QWidget):
def __init__(self):
super().__init__()
# geometry
self.setGeometry(900, 360, 700, 800)
# View
# table_view = qtw.QTableView()
table_view = AutoExpandingTableView()
table_view.setSizePolicy(
QSizePolicy.Expanding,
QSizePolicy.Preferred
)
# done # turn scroll bars off
table_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
table_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.model = ViewModel()
table_view.setModel(self.model)
table_view.model().rowsInserted.connect(table_view.adjustSize)
table_view.model().rowsRemoved.connect(table_view.adjustSize)
table_view.horizontalHeader().setStretchLastSection(True)
# table_view.verticalHeader().setStretchLastSection(True)
# table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
#table_view.verticalHeader().setDefaultSectionSize(24)
table_view.verticalHeader().setSectionResizeMode(
qtw.QHeaderView.ResizeToContents) # Add this line
# widgets
self.insert_row_button = qtw.QPushButton("insert row")
self.deleate_row_button = qtw.QPushButton("deleate row")
# layout
layout = qtw.QVBoxLayout()
layout.addWidget(table_view)
layout.addStretch()
layout.addWidget(self.insert_row_button)
layout.addWidget(self.deleate_row_button)
self.setLayout(layout)
self.show()
# function
self.insert_row_button.clicked.connect(lambda: self.model.insertRows(-1, 1))
self.deleate_row_button.clicked.connect(lambda: self.model.removeRows(-1, 1))
if __name__ == '__main__':
app = qtw.QApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())
要考虑的最重要方面是 sizeHint()，这是小部件 建议 包含它的布局的推荐大小。
虽然项目视图很棘手。它们可能有 header，它们的内容在程序的生命周期中可能会更改多次，并且每个项目可能有不同的大小（用户可以交互修改）。
要实现你想要的，你必须使用updateGeometry():
Notifies the layout system that this widget has changed and may need to change geometry.
Call this function if the sizeHint() or sizePolicy() have changed.
请注意，不建议为此调用 adjustSize()。
项目视图的大小提示 必须 考虑到（可见的）headers 和 框架宽度，因为所有 QAbstractItemView 后代都继承自 QFrame。
最后，为了确保动态调整大小提示并通知布局系统，您还应该连接模型和 header 可能发送的所有正确信号。
请注意，虽然您可以从外部连接所有这些信号，但通常最好让 class 本身在内部处理它。
class ExpandingTableView(qtw.QTableView):
shown = False
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
self.verticalHeader().sectionResized.connect(self.updateGeometry)
self.verticalHeader().sectionCountChanged.connect(self.updateGeometry)
def setVerticalHeader(self, header):
self.verticalHeader().sectionResized.disconnect(self.updateGeometry)
self.verticalHeader().sectionCountChanged.disconnect(self.updateGeometry)
super().setVerticalHeader(header)
header.sectionResized.connect(self.updateGeometry)
header.sectionCountChanged.connect(self.updateGeometry)
def setModel(self, model):
if self.model():
self.model().rowsInserted.disconnect(self.updateGeometry)
self.model().rowsRemoved.disconnect(self.updateGeometry)
super().setModel(model)
if model:
model.rowsInserted.connect(self.updateGeometry)
model.rowsRemoved.connect(self.updateGeometry)
self.updateGeometry()
# optional, if you want to ensure that a minimum height is always respected
def updateGeometry(self):
self.setMinimumHeight(min(self.sizeHint().height(),
self.verticalHeader().defaultSectionSize() * 8))
super().updateGeometry()
def sizeHint(self):
height = 0
if self.horizontalHeader().isVisible():
height += self.horizontalHeader().height()
height += self.verticalHeader().length() + self.frameWidth() * 2
return QSize(super().sizeHint().width(), height)
def showEvent(self, event):
super().showEvent(event)
# when the view is shown the first time it might not have computed the
# correct size hint, let's ensure that we notify the underlying
# layout manager(s)
if not self.shown:
self.shown = True
self.updateGeometry()
我有一个子类 QAbstractTableModel
以全尺寸显示 Table 视图中的数据而不滚动我已经关闭了滚动条
为了去除 Table 视图周围的白色 space，我已将 vertical/horizontal table 长度设置为特定值。
问题是
我已经向模型添加了一个 add/deleate 行方法，所以现在 Table 视图 expands/shrinks
调整 Table 查看行为以全尺寸显示数据且没有白色 space 我已将水平 Header 设置为
table_view.horizontalHeader().setStretchLastSection(True)
正确切断水平方向的白色 space
对白色 space 的垂直 header 切割也进行相同的操作，但过度拉伸最后一行
我尝试使用
将每一行设置为默认大小table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
table_view.verticalHeader().setDefaultSectionSize(40)
但这会再次打开白色 space
简而言之：我正在寻找一种在 Table 全尺寸视图中显示模型数据的方法，没有白色 Space 同时能够 deleate/insert 一行
代码示例
#!/usr/bin/env python
"""
"""
import sys
import re
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5.QtCore import Qt
from PyQt5 import QtGui as qtg
class ViewModel(qtc.QAbstractTableModel):
def __init__(self, input_data=None):
super().__init__()
self.input_data = input_data or [["data","data","data","data"],["data","data","data","data"]]
#
def data(self, index, role): # parameter index, role are needed !
"""
"""
if role == qtc.Qt.DisplayRole:
try:
text = self.input_data[index.row()][index.column()]
except IndexError:
text = None
return text
def rowCount(self, index=qtc.QModelIndex()):
return 0 if index.isValid() else len(self.input_data)
def columnCount(self, index):
return len(self.input_data[0])
def insertRows(self, position, rows, parent=qtc.QModelIndex()):
print(position) # -1
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end <= 8:
self.beginInsertRows(parent, start, end)
self.input_data.append([])
self.endInsertRows()
return True
else:
return False
def removeRows(self, position, rows, parent=qtc.QModelIndex()):
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end >= 1:
self.beginRemoveRows(parent, start, end)
del self.input_data[start:end + 1]
self.endRemoveRows()
return True
else:
return False
def headerData(self, section, orientation, role):
if role == qtc.Qt.DisplayRole:
if orientation == qtc.Qt.Horizontal:
return "hight " + str(section+1) + " /mm"
if orientation == qtc.Qt.Vertical:
return "width " + str(section+1)
def flags(self, index):
return qtc.Qt.ItemIsEditable | qtc.Qt.ItemIsSelectable | qtc.Qt.ItemIsEnabled
def setData(self, index, value, role=qtc.Qt.EditRole):
if role == qtc.Qt.EditRole:
try:
row = index.row()
column = index.column()
pattern = '^[\d]+(?:,[\d]+)?$'
if re.fullmatch(pattern, value, flags=0):
print("true")
self.input_data[row][column] = value # float
else:
print("nope")
pass
return True
except ValueError:
print("not a number")
return False
def display_model_data(self):
print(self.input_data)
class MainWindow(qtw.QWidget):
def __init__(self):
super().__init__()
# geometry
self.setGeometry(900, 360, 700, 800)
# View
table_view = qtw.QTableView()
# done # turn scroll bars off
table_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
table_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.model = ViewModel()
table_view.setModel(self.model)
table_view.horizontalHeader().setStretchLastSection(True)
# table_view.verticalHeader().setStretchLastSection(True)
table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
table_view.verticalHeader().setDefaultSectionSize(24)
table_view.verticalHeader().setStretchLastSection(True)
# verticalHeader->setSectionResizeMode(QHeaderView::Fixed);
# verticalHeader->setDefaultSectionSize(24);
# widgets
self.insert_row_button = qtw.QPushButton("insert row")
self.deleate_row_button = qtw.QPushButton("deleate row")
# layout
layout = qtw.QVBoxLayout()
layout.addWidget(table_view)
layout.addWidget(self.insert_row_button)
layout.addWidget(self.deleate_row_button)
self.setLayout(layout)
self.show()
# function
self.insert_row_button.clicked.connect(lambda: self.model.insertRows(-1, 1))
self.deleate_row_button.clicked.connect(lambda: self.model.removeRows(-1, 1))
if __name__ == '__main__':
app = qtw.QApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())
space 不能神奇地消失。假设总 table 高度是 600。如果 table 中有两行，第一行是 40。那么，如果你不想的话，第二行是 600 - 40 = 560' table 底部空白。如果将每行的高度设置为 40，则空白 space 的高度将为 600 - 2 * 40 = 520。你不能要求（总高度 600）+（两行，每行 40） +（底部没有空格 space）。
所以，我猜，你要(a.底部没有空白space)+(b,space平分行，这样最后一行就不会看起来很奇怪。）。如果是这样的话，我已经将你的代码编辑到下面，解释了一切：
"""
"""
import sys
import re
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5.QtCore import Qt
from PyQt5 import QtGui as qtg
class ViewModel(qtc.QAbstractTableModel):
def __init__(self, input_data=None):
super().__init__()
self.input_data = input_data or [["data","data","data","data"],["data","data","data","data"]]
#
def data(self, index, role): # parameter index, role are needed !
"""
"""
if role == qtc.Qt.DisplayRole:
try:
text = self.input_data[index.row()][index.column()]
except IndexError:
text = None
return text
def rowCount(self, index=qtc.QModelIndex()):
return 0 if index.isValid() else len(self.input_data)
def columnCount(self, index):
return len(self.input_data[0])
def insertRows(self, position, rows, parent=qtc.QModelIndex()):
print(position) # -1
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end <= 8:
self.beginInsertRows(parent, start, end)
self.input_data.append([])
self.endInsertRows()
return True
else:
return False
def removeRows(self, position, rows, parent=qtc.QModelIndex()):
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end >= 1:
self.beginRemoveRows(parent, start, end)
del self.input_data[start:end + 1]
self.endRemoveRows()
return True
else:
return False
def headerData(self, section, orientation, role):
if role == qtc.Qt.DisplayRole:
if orientation == qtc.Qt.Horizontal:
return "hight " + str(section+1) + " /mm"
if orientation == qtc.Qt.Vertical:
return "width " + str(section+1)
def flags(self, index):
return qtc.Qt.ItemIsEditable | qtc.Qt.ItemIsSelectable | qtc.Qt.ItemIsEnabled
def setData(self, index, value, role=qtc.Qt.EditRole):
if role == qtc.Qt.EditRole:
try:
row = index.row()
column = index.column()
pattern = '^[\d]+(?:,[\d]+)?$'
if re.fullmatch(pattern, value, flags=0):
print("true")
self.input_data[row][column] = value # float
else:
print("nope")
pass
return True
except ValueError:
print("not a number")
return False
def display_model_data(self):
print(self.input_data)
class NoBlankSpaceAtBottomEnvenlySplitTableView(qtw.QTableView):
def sizeHintForRow(self, row):
row_count = self.model().rowCount()
height = self.viewport().height()
row_height = int(height/row_count)
if row < row_count - 1:
return row_height
else:
return super().sizeHintForRow(row)
class MainWindow(qtw.QWidget):
def __init__(self):
super().__init__()
# geometry
self.setGeometry(900, 360, 700, 800)
# View
# table_view = qtw.QTableView()
table_view = NoBlankSpaceAtBottomEnvenlySplitTableView()
# done # turn scroll bars off
table_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
table_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.model = ViewModel()
table_view.setModel(self.model)
table_view.horizontalHeader().setStretchLastSection(True)
table_view.verticalHeader().setStretchLastSection(True)
# table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
#table_view.verticalHeader().setDefaultSectionSize(24)
table_view.verticalHeader().setSectionResizeMode(
qtw.QHeaderView.ResizeToContents) # Add this line
table_view.verticalHeader().setStretchLastSection(True)
# verticalHeader->setSectionResizeMode(QHeaderView::Fixed);
# verticalHeader->setDefaultSectionSize(24);
# widgets
self.insert_row_button = qtw.QPushButton("insert row")
self.deleate_row_button = qtw.QPushButton("deleate row")
# layout
layout = qtw.QVBoxLayout()
layout.addWidget(table_view)
layout.addWidget(self.insert_row_button)
layout.addWidget(self.deleate_row_button)
self.setLayout(layout)
self.show()
# function
self.insert_row_button.clicked.connect(lambda: self.model.insertRows(-1, 1))
self.deleate_row_button.clicked.connect(lambda: self.model.removeRows(-1, 1))
if __name__ == '__main__':
app = qtw.QApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())
编辑：Table 根据行数自动调整高度
import sys
import re
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5.QtCore import Qt, QSize
from PyQt5.QtWidgets import QSizePolicy
from PyQt5 import QtGui as qtg
class ViewModel(qtc.QAbstractTableModel):
def __init__(self, input_data=None):
super().__init__()
self.input_data = input_data or [["data","data","data","data"],["data","data","data","data"]]
#
def data(self, index, role): # parameter index, role are needed !
"""
"""
if role == qtc.Qt.DisplayRole:
try:
text = self.input_data[index.row()][index.column()]
except IndexError:
text = None
return text
def rowCount(self, index=qtc.QModelIndex()):
return 0 if index.isValid() else len(self.input_data)
def columnCount(self, index):
return len(self.input_data[0])
def insertRows(self, position, rows, parent=qtc.QModelIndex()):
print(position) # -1
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end <= 8:
self.beginInsertRows(parent, start, end)
self.input_data.append([])
self.endInsertRows()
return True
else:
return False
def removeRows(self, position, rows, parent=qtc.QModelIndex()):
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end >= 1:
self.beginRemoveRows(parent, start, end)
del self.input_data[start:end + 1]
self.endRemoveRows()
return True
else:
return False
def headerData(self, section, orientation, role):
if role == qtc.Qt.DisplayRole:
if orientation == qtc.Qt.Horizontal:
return "hight " + str(section+1) + " /mm"
if orientation == qtc.Qt.Vertical:
return "width " + str(section+1)
def flags(self, index):
return qtc.Qt.ItemIsEditable | qtc.Qt.ItemIsSelectable | qtc.Qt.ItemIsEnabled
def setData(self, index, value, role=qtc.Qt.EditRole):
if role == qtc.Qt.EditRole:
try:
row = index.row()
column = index.column()
pattern = '^[\d]+(?:,[\d]+)?$'
if re.fullmatch(pattern, value, flags=0):
print("true")
self.input_data[row][column] = value # float
else:
print("nope")
pass
return True
except ValueError:
print("not a number")
return False
def display_model_data(self):
print(self.input_data)
class AutoExpandingTableView(qtw.QTableView):
# def sizeHintForRow(self, row):
# row_count = self.model().rowCount()
# height = self.viewport().height()
# row_height = int(height/row_count)
# if row < row_count - 1:
# return row_height
# else:
# return super().sizeHintForRow(row)
def sizeHint(self):
viewport_size_hint = self.viewportSizeHint()
return QSize(
self.width(),
viewport_size_hint.height()
)
class MainWindow(qtw.QWidget):
def __init__(self):
super().__init__()
# geometry
self.setGeometry(900, 360, 700, 800)
# View
# table_view = qtw.QTableView()
table_view = AutoExpandingTableView()
table_view.setSizePolicy(
QSizePolicy.Expanding,
QSizePolicy.Preferred
)
# done # turn scroll bars off
table_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
table_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.model = ViewModel()
table_view.setModel(self.model)
table_view.model().rowsInserted.connect(table_view.adjustSize)
table_view.model().rowsRemoved.connect(table_view.adjustSize)
table_view.horizontalHeader().setStretchLastSection(True)
# table_view.verticalHeader().setStretchLastSection(True)
# table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
#table_view.verticalHeader().setDefaultSectionSize(24)
table_view.verticalHeader().setSectionResizeMode(
qtw.QHeaderView.ResizeToContents) # Add this line
# widgets
self.insert_row_button = qtw.QPushButton("insert row")
self.deleate_row_button = qtw.QPushButton("deleate row")
# layout
layout = qtw.QVBoxLayout()
layout.addWidget(table_view)
layout.addStretch()
layout.addWidget(self.insert_row_button)
layout.addWidget(self.deleate_row_button)
self.setLayout(layout)
self.show()
# function
self.insert_row_button.clicked.connect(lambda: self.model.insertRows(-1, 1))
self.deleate_row_button.clicked.connect(lambda: self.model.removeRows(-1, 1))
if __name__ == '__main__':
app = qtw.QApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())
要考虑的最重要方面是 sizeHint()，这是小部件 建议 包含它的布局的推荐大小。
虽然项目视图很棘手。它们可能有 header，它们的内容在程序的生命周期中可能会更改多次，并且每个项目可能有不同的大小（用户可以交互修改）。
要实现你想要的，你必须使用updateGeometry():
Notifies the layout system that this widget has changed and may need to change geometry.
Call this function if the sizeHint() or sizePolicy() have changed.
请注意，不建议为此调用 adjustSize()。
项目视图的大小提示 必须 考虑到（可见的）headers 和 框架宽度，因为所有 QAbstractItemView 后代都继承自 QFrame。
最后，为了确保动态调整大小提示并通知布局系统，您还应该连接模型和 header 可能发送的所有正确信号。
请注意，虽然您可以从外部连接所有这些信号，但通常最好让 class 本身在内部处理它。
class ExpandingTableView(qtw.QTableView):
shown = False
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
self.verticalHeader().sectionResized.connect(self.updateGeometry)
self.verticalHeader().sectionCountChanged.connect(self.updateGeometry)
def setVerticalHeader(self, header):
self.verticalHeader().sectionResized.disconnect(self.updateGeometry)
self.verticalHeader().sectionCountChanged.disconnect(self.updateGeometry)
super().setVerticalHeader(header)
header.sectionResized.connect(self.updateGeometry)
header.sectionCountChanged.connect(self.updateGeometry)
def setModel(self, model):
if self.model():
self.model().rowsInserted.disconnect(self.updateGeometry)
self.model().rowsRemoved.disconnect(self.updateGeometry)
super().setModel(model)
if model:
model.rowsInserted.connect(self.updateGeometry)
model.rowsRemoved.connect(self.updateGeometry)
self.updateGeometry()
# optional, if you want to ensure that a minimum height is always respected
def updateGeometry(self):
self.setMinimumHeight(min(self.sizeHint().height(),
self.verticalHeader().defaultSectionSize() * 8))
super().updateGeometry()
def sizeHint(self):
height = 0
if self.horizontalHeader().isVisible():
height += self.horizontalHeader().height()
height += self.verticalHeader().length() + self.frameWidth() * 2
return QSize(super().sizeHint().width(), height)
def showEvent(self, event):
super().showEvent(event)
# when the view is shown the first time it might not have computed the
# correct size hint, let's ensure that we notify the underlying
# layout manager(s)
if not self.shown:
self.shown = True
self.updateGeometry()