我有一个子类QAbstractTableModel
在不滚动的情况下以全尺寸显示 TableView 中的数据我已经关闭了滚动条
为了摆脱表格 View 周围的空白，我将垂直/水平表格长度设置为特定值。
问题是
我在模型中添加了一个添加/删除行方法，因此 TableView 现在可以扩展/缩小
调整表格 View 行为以全尺寸显示数据并且没有空白我已将水平标题设置为
table_view.horizontalHeader().setStretchLastSection(True)
正确切断水平方向的空白
对空白的垂直标题切割也进行相同的操作，但会过度拉伸(stretch)最后一行
我尝试将每一行设置为默认大小
table_view.verticalHeader().setSectionResizeMode(qtw.QHeaderView.Fixed)
table_view.verticalHeader().setDefaultSectionSize(40)
但这会再次打开空白区域
简而言之:我正在寻找一种方法来在 TableView 中以全尺寸显示模型数据而没有空白，同时能够删除/插入行
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_())
最佳答案
空间不会神奇地消失。假设表格的总高度是 600。如果表格中有两行，第一行是 40。那么，第二行是 600 - 40 = 560 如果你不想在表格底部留空.如果将每行的高度设置为 40，则空白区域的高度将为 600 - 2 * 40 = 520。你不能要求(总高度 600)+(两行，每行 40)+(无空白底部的空间)。
所以，让我猜猜，你想要 (a. 底部没有空格) + (b, 空格被均匀地分成行，这样最后一行就不会看起来很奇怪。)。如果是这样的话，我已将您的代码编辑到下面，解释了所有内容:
"""
"""
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:表格根据行自动调整高度
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_())
关于python - 如何在没有可见空白的情况下扩展/缩小 QTable View，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62327585/