setHorizontalHeader()之后,QTableView排序失败 [英] QTableView sorting fails after setHorizontalHeader()
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问题描述
我通过setHorizontalHeader()
设置了新的QHeaderView
实例后,PySide QTableView
遇到了一个奇怪的问题.具体来说,该视图的排序功能似乎已损坏/无法再调用.
I am encountering a strange problem with PySide QTableView
s after I have set a new QHeaderView
instance via setHorizontalHeader()
. Specifically it seems that the sorting ability of the view is broken/cannot be invoked anymore.
- 设置新的标题视图后,为什么排序会中断?
- 为什么通过
setHorizontalHeader()
设置新头后,仅在头视图实例 上的Monkeypatching方法起作用 ? (请参见演示代码中的wrap_size_hint()
.) - 记录表视图的子级时,为什么总是2个
QHeaderView
实例? -
QHeaderView
上的initialize()
方法实际上在做什么?它们在任何方面都可以有用吗? 文档不是'很有帮助.
- Why is the sorting broken after a new header view is set?
- Why does monkeypatching methods on the header view instance only work after a setting a new header via
setHorizontalHeader()
? (Seewrap_size_hint()
in the demo code.) - When logging the children of the table view, why are the always 2
QHeaderView
instances? - What are the
initialize()
methods on theQHeaderView
actually doing? Could they be useful here in any way? The docs aren't quite that helpfull.
# -*- coding: utf-8 -*-
from __future__ import unicode_literals, print_function, division
import logging
import sys
from PySide import QtCore
from PySide import QtGui
# configure logging
logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger(__name__)
def wrap_size_hint(func):
"""Monkeypatch virtual method to increase sizeHint.
Notes:
Strangely this does not work when when no custom header is set on the
table view.
"""
def wrapped(*args, **kwargs):
"""Just extend sizeHint to increase height."""
size = func(*args, **kwargs) # QSize
height_increase = 60
height = size.height() + height_increase
size.setHeight(height)
return size
return wrapped
class CustomHeaderView(QtGui.QHeaderView):
"""CustomHeaderView"""
class TestWidget(QtGui.QWidget):
def __init__(self, use_custom_headerview=True, *args, **kwargs):
super(TestWidget, self).__init__(*args, **kwargs)
self.logger = logging.getLogger(type(self).__name__)
QtGui.QVBoxLayout(self)
self.setup_mvc(use_custom_headerview)
self.update_model()
self.log_children(self.view)
def setup_mvc(self, use_custom_headerview):
layout = self.layout()
# model
header_labels = "One Two Three Four Five".split()
self.model = QtGui.QStandardItemModel()
self.model.setHorizontalHeaderLabels(header_labels)
# proxymodel
self.proxymodel = QtGui.QSortFilterProxyModel()
self.proxymodel.setDynamicSortFilter(True)
self.proxymodel.setSourceModel(self.model)
# view
self.view = QtGui.QTableView()
if (use_custom_headerview is True):
self.view.setHorizontalHeader(CustomHeaderView(QtCore.Qt.Horizontal))
self.view.setSortingEnabled(True)
self.view.setModel(self.proxymodel)
# monkeypatch sizeHint to increase size
headerview = self.view.horizontalHeader()
headerview.sizeHint = wrap_size_hint(headerview.sizeHint)
layout.addWidget(self.view)
def update_model(self):
for row in range(50):
items = []
for column in range(self.model.columnCount()):
text = "{0} {1}".format(row, column)
item = QtGui.QStandardItem()
item.setEditable(True)
item.setData(text, QtCore.Qt.DisplayRole)
items.append(item)
self.model.appendRow(items)
def log_children(self, widget, tab=-1):
tab += 1
msg = "{0}{0}: {1}".format("--"*tab, type(widget).__name__, widget)
self.logger.info(msg)
for child in widget.children():
self.log_children(child, tab)
if (__name__ == "__main__"):
app = QtGui.QApplication(sys.argv)
# widget_sorting_fails
widget_sorting_fails = TestWidget(use_custom_headerview=True)
widget_sorting_fails.setWindowTitle("Custom headerview")
widget_sorting_fails.show()
logger.info("-"*100)
# widget_sorting_succeeds
widget_sorting_succeeds = TestWidget(use_custom_headerview=False)
widget_sorting_succeeds.setWindowTitle("No custom headerview")
widget_sorting_succeeds.show()
# start event loop
sys.exit(app.exec_())
推荐答案
好,发现setClickable(True)
可以解决问题.默认情况下,似乎在QTableView
标头视图上处于启用状态,但在手动创建的实例上则未处于打开状态.
Ok, found out that setClickable(True)
will do the trick. Seems to be on by default on QTableView
header views but not on instances created manually.
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