更新行时如何提高 QTreeView 的速度？
How can I improve speed of QTreeView when updating rows?
如何提高此 python 工具的速度。当用户输入 Description 或 Name 输入时，它会减慢程序速度，同时更新 QTreeView 第二列中的项目列表。看起来不应该是一个过程的征税。
为什么我重新创建整个项目列表比仅更新每行第二列中的文本更快？
我注意到这样做更快：
# self.uiAssetName.textChanged.connect(self.generate_names)
# self.uiAssetDescription.textChanged.connect(self.generate_names)
self.uiAssetName.textChanged.connect(self.generate_assets)
self.uiAssetDescription.textChanged.connect(self.generate_assets)
# Simple rename tool using QTreeView, pass data object into treeview
from __future__ import print_function
# Modules
import sys
import random
from PySide import QtGui, QtCore
AssetClasses = {
"Label A": "AA",
"Label B": "BB",
"Label C": "CC",
"Label D": "DD",
"Label E": "EE",
"Label F": "FF",
"Label G": "GG",
"Label H": "HH"
}
class Asset(object):
def __init__(self, name=''):
self.name = name
self.newname = ''
class PSRenamer(QtGui.QMainWindow):
def __init__(self):
super(PSRenamer, self).__init__()
# ui
self.setWindowTitle(self.tr("Renamer"))
self.setMinimumWidth(450)
self.setMinimumHeight(500)
# create widgets
lbAssetClass = QtGui.QLabel("Class")
self.uiAssetClass = QtGui.QComboBox()
lbAssetName = QtGui.QLabel("Name")
self.uiAssetName = QtGui.QLineEdit()
self.uiAssetName.setPlaceholderText('Name...')
lbAssetDescription = QtGui.QLabel("Description")
self.uiAssetDescription = QtGui.QLineEdit()
self.uiAssetDescription.setPlaceholderText('Description...')
# treeview
self._model = QtGui.QStandardItemModel()
self.ui_items = QtGui.QTreeView()
self.ui_items.setAlternatingRowColors(True)
self.ui_items = QtGui.QTreeView()
self.ui_items.setAlternatingRowColors(True)
self.ui_items.setModel(self._model)
self.ui_items.setSortingEnabled(True)
self.ui_items.sortByColumn(0, QtCore.Qt.AscendingOrder)
self.ui_items.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
self.ui_items.setSelectionMode(QtGui.QAbstractItemView.NoSelection)
self.ui_items.setFocusPolicy(QtCore.Qt.NoFocus)
self.ui_items.header().setResizeMode(QtGui.QHeaderView.ResizeToContents)
self.ui_items.header().setStretchLastSection(False)
self.uiGenerateAssets = QtGui.QPushButton("Generate")
self.uiRunRenamer = QtGui.QPushButton("Apply")
# layout: controls
gdl = QtGui.QGridLayout()
gdl.setContentsMargins(10, 5, 10, 5)
gdl.addWidget(lbAssetClass, 0, 0)
gdl.addWidget(self.uiAssetClass, 0, 1)
gdl.addWidget(lbAssetName, 1, 0)
gdl.addWidget(self.uiAssetName, 1, 1)
gdl.addWidget(lbAssetDescription, 2, 0)
gdl.addWidget(self.uiAssetDescription, 2, 1)
gdl.addWidget(self.ui_items, 3, 0, 1, 2)
gdl.addWidget(self.uiGenerateAssets, 4, 0, 1, 1)
gdl.addWidget(self.uiRunRenamer, 4, 1, 1, 1)
# main layout
main_widget = QtGui.QWidget()
main_widget.setLayout(gdl)
self.setCentralWidget(main_widget)
for c in AssetClasses:
self.uiAssetClass.addItem(c, AssetClasses[c])
self.uiAssetClass.currentIndexChanged.connect(self.generate_names)
self.uiAssetClass.setCurrentIndex(6)
# actions
self.uiAssetName.textChanged.connect(self.generate_names)
self.uiAssetDescription.textChanged.connect(self.generate_names)
self.uiRunRenamer.clicked.connect(self.setNewNames)
self.uiGenerateAssets.clicked.connect(self.generateAssets)
self.generateAssets()
def generateAssets(self):
print("generate new assets")
items = [
'Football', 'Steve', 'Basketball', 'Grag', 'Badminton', 'Boris', 'Red Lamp', 'Ann', 'PinSpot', 'Diana', 'Soccer', 'Jogn', 'Ferrari', 'Aziz', 'Train', 'Asef', 'Cat', 'Arnold', 'IceHockey', 'Dimitras', 'Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado', 'Connecticut', 'Delaware', 'District of Columbia', 'Florida', 'Georgia', 'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire', 'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island', 'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming', 'Afghanistan', 'Albania', 'Algeria', 'American Samoa', 'Andorra', 'Angola', 'Anguilla', 'Antarctica', 'Antigua and Barbuda', 'Argentina', 'Armenia', 'Aruba', 'Australia', 'Austria', 'Azerbaijan', 'Bahamas', 'Bahrain', 'Bangladesh', 'Barbados', 'Belarus', 'Belgium', 'Belize', 'Benin', 'Bermuda', 'Bhutan', 'Bolivia', 'Bosnia and Herzegovina', 'Botswana', 'Bouvet Island', 'Brazil', 'British Indian Ocean Territory', 'Brunei Darussalam', 'Bulgaria', 'Burkina Faso', 'Burundi', 'Cambodia', 'Cameroon', 'Canada', 'Cape Verde', 'Cayman Islands', 'Central African Republic', 'Chad', 'Chile', 'China', 'Christmas Island', 'Cocos (Keeling) Islands', 'Colombia', 'Comoros', 'Congo', 'Congo', 'The Democratic Republic of The', 'Cook Islands', 'Costa Rica', 'Cote Divoire', 'Croatia', 'Cuba', 'Cyprus', 'Czech Republic', 'Denmark', 'Djibouti', 'Dominica', 'Dominican Republic', 'Ecuador', 'Egypt', 'El Salvador', 'Equatorial Guinea', 'Eritrea', 'Estonia', 'Ethiopia', 'Falkland Islands (Malvinas)', 'Faroe Islands', 'Fiji', 'Finland', 'France', 'French Guiana', 'French Polynesia', 'French Southern Territories', 'Gabon', 'Gambia', 'Georgia', 'Germany', 'Ghana', 'Gibraltar', 'Greece', 'Greenland', 'Grenada', 'Guadeloupe', 'Guam', 'Guatemala', 'Guinea', 'Guinea-bissau', 'Guyana', 'Haiti', 'Heard Island and Mcdonald Islands', 'Holy See (Vatican City State)', 'Honduras', 'Hong Kong', 'Hungary', 'Iceland', 'India', 'Indonesia', 'Iran', 'Islamic Republic of', 'Iraq', 'Ireland', 'Israel', 'Italy', 'Jamaica', 'Japan', 'Jordan', 'Kazakhstan', 'Kenya', 'Kiribati', 'Korea', 'Democratic Peoples Republic of', 'Korea', 'Republic of', 'Kuwait', 'Kyrgyzstan', 'Lao Peoples Democratic Republic', 'Latvia', 'Lebanon', 'Lesotho', 'Liberia', 'Libyan Arab Jamahiriya', 'Liechtenstein', 'Lithuania', 'Luxembourg', 'Macao', 'Macedonia', 'The Former Yugoslav Republic of', 'Madagascar', 'Malawi', 'Malaysia', 'Maldives', 'Mali', 'Malta', 'Marshall Islands', 'Martinique', 'Mauritania', 'Mauritius', 'Mayotte', 'Mexico', 'Micronesia', 'Federated States of', 'Moldova', 'Republic of', 'Monaco', 'Mongolia', 'Montserrat', 'Morocco', 'Mozambique', 'Myanmar', 'Namibia', 'Nauru', 'Nepal', 'Netherlands', 'Netherlands Antilles', 'New Caledonia', 'New Zealand', 'Nicaragua', 'Niger', 'Nigeria', 'Niue', 'Norfolk Island', 'Northern Mariana Islands', 'Norway', 'Oman', 'Pakistan', 'Palau', 'Palestinian Territory', 'Occupied', 'Panama', 'Papua New Guinea', 'Paraguay', 'Peru', 'Philippines', 'Pitcairn', 'Poland', 'Portugal', 'Puerto Rico', 'Qatar', 'Reunion', 'Romania', 'Russian Federation', 'Rwanda', 'Saint Helena', 'Saint Kitts and Nevis', 'Saint Lucia', 'Saint Pierre and Miquelon', 'Saint Vincent and The Grenadines', 'Samoa', 'San Marino', 'Sao Tome and Principe', 'Saudi Arabia', 'Senegal', 'Serbia and Montenegro', 'Seychelles', 'Sierra Leone', 'Singapore', 'Slovakia', 'Slovenia', 'Solomon Islands', 'Somalia', 'South Africa', 'South Georgia and The South Sandwich Islands', 'Spain', 'Sri Lanka', 'Sudan', 'Suriname', 'Svalbard and Jan Mayen', 'Swaziland', 'Sweden', 'Switzerland', 'Syrian Arab Republic', 'Taiwan', 'Province of China', 'Tajikistan', 'Tanzania', 'United Republic of', 'Thailand', 'Timor-leste', 'Togo', 'Tokelau', 'Tonga', 'Trinidad and Tobago', 'Tunisia', 'Turkey', 'Turkmenistan', 'Turks and Caicos Islands', 'Tuvalu', 'Uganda', 'Ukraine', 'United Arab Emirates', 'United Kingdom', 'United States', 'United States Minor Outlying Islands', 'Uruguay', 'Uzbekistan', 'Vanuatu', 'Venezuela', 'Viet Nam', 'Virgin Islands', 'British', 'Virgin Islands', 'U.S.', 'Wallis and Futuna', 'Western Sahara', 'Yemen', 'Zambia', 'Zimbabwe'
]
model = self.ui_items.model()
model.clear()
columns = ["Name","New Name"]
model.setHorizontalHeaderLabels(columns)
random.seed()
for name in random.sample(items, random.randint(1, len(items))):
obj = Asset(name)
model.insertRow(0)
model.setData(model.index(0, 0), obj.name)
model.setData(model.index(0, 1), obj.newname)
# Append peson data
model.setData(model.index(0, 0), obj, role=QtCore.Qt.UserRole)
model.setData(model.index(0, 1),
QtGui.QBrush(QtGui.QColor(50, 80, 190, 255)),
QtCore.Qt.ForegroundRole)
self.generate_names()
def setNewNames(self):
print("apply new names")
model = self.ui_items.model()
for i in range(model.rowCount()):
sidx = model.index(i, 1,
parent=QtCore.QModelIndex())
didx = model.index(i, 0,
parent=QtCore.QModelIndex())
if sidx.isValid() and didx.isValid():
model.setData(didx, sidx.data())
data = didx.data(role=QtCore.Qt.UserRole)
if isinstance(data, Person):
print(i + 1, data)
def generate_names(self):
index = self.uiAssetClass.currentIndex()
assetCode = str(self.uiAssetClass.itemData(index))
items = [assetCode, self.uiAssetName.text(),
self.uiAssetDescription.text()]
items = list(filter(lambda x: x, items))
name_template = '_'.join(items)
print('NT: {}'.format(name_template))
self.set_new_names(name_template)
def set_new_names(self, template):
model = self.ui_items.model()
names = {}
for i in range(model.rowCount()):
if template not in names:
names[template] = []
names[template].append(model.index(i, 1,
parent=QtCore.QModelIndex()))
# Set names
for tmpl, items in names.items():
for idx, item in enumerate(items):
if item.isValid():
suffix = '_{:03d}'.format(idx+1)
if len(items) == 1:
suffix = ''
model.setData(item, '{}{}'.format(tmpl, suffix))
# Main
# -----------------------------------------------------------------------------
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
window = PSRenamer()
window.show()
app.exec_()
您默认启用列排序和调整大小。这意味着每次更改一行时，整个列表都会重新排序和调整大小。显然，如果列表相当长，这绝对会降低性能。
解决方案是关闭默认 sorting/resizing 并仅在重新填充列表后应用它：
class PSRenamer(QtGui.QMainWindow):
def __init__(self):
...
self.ui_items.setModel(self._model)
# self.ui_items.setSortingEnabled(True)
# self.ui_items.sortByColumn(0, QtCore.Qt.AscendingOrder)
self.ui_items.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
self.ui_items.setSelectionMode(QtGui.QAbstractItemView.NoSelection)
self.ui_items.setFocusPolicy(QtCore.Qt.NoFocus)
# self.ui_items.header().setResizeMode(QtGui.QHeaderView.ResizeToContents)
self.ui_items.header().setStretchLastSection(False)
def set_new_names(self, template):
self.ui_items.setSortingEnabled(False)
...
# Set names
...
self.ui_items.setSortingEnabled(True)
self.ui_items.sortByColumn(0, QtCore.Qt.AscendingOrder)
self.ui_items.header().resizeSections(QtGui.QHeaderView.ResizeToContents)
如何提高此 python 工具的速度。当用户输入 Description 或 Name 输入时，它会减慢程序速度，同时更新 QTreeView 第二列中的项目列表。看起来不应该是一个过程的征税。
为什么我重新创建整个项目列表比仅更新每行第二列中的文本更快？
我注意到这样做更快：
# self.uiAssetName.textChanged.connect(self.generate_names)
# self.uiAssetDescription.textChanged.connect(self.generate_names)
self.uiAssetName.textChanged.connect(self.generate_assets)
self.uiAssetDescription.textChanged.connect(self.generate_assets)
# Simple rename tool using QTreeView, pass data object into treeview
from __future__ import print_function
# Modules
import sys
import random
from PySide import QtGui, QtCore
AssetClasses = {
"Label A": "AA",
"Label B": "BB",
"Label C": "CC",
"Label D": "DD",
"Label E": "EE",
"Label F": "FF",
"Label G": "GG",
"Label H": "HH"
}
class Asset(object):
def __init__(self, name=''):
self.name = name
self.newname = ''
class PSRenamer(QtGui.QMainWindow):
def __init__(self):
super(PSRenamer, self).__init__()
# ui
self.setWindowTitle(self.tr("Renamer"))
self.setMinimumWidth(450)
self.setMinimumHeight(500)
# create widgets
lbAssetClass = QtGui.QLabel("Class")
self.uiAssetClass = QtGui.QComboBox()
lbAssetName = QtGui.QLabel("Name")
self.uiAssetName = QtGui.QLineEdit()
self.uiAssetName.setPlaceholderText('Name...')
lbAssetDescription = QtGui.QLabel("Description")
self.uiAssetDescription = QtGui.QLineEdit()
self.uiAssetDescription.setPlaceholderText('Description...')
# treeview
self._model = QtGui.QStandardItemModel()
self.ui_items = QtGui.QTreeView()
self.ui_items.setAlternatingRowColors(True)
self.ui_items = QtGui.QTreeView()
self.ui_items.setAlternatingRowColors(True)
self.ui_items.setModel(self._model)
self.ui_items.setSortingEnabled(True)
self.ui_items.sortByColumn(0, QtCore.Qt.AscendingOrder)
self.ui_items.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
self.ui_items.setSelectionMode(QtGui.QAbstractItemView.NoSelection)
self.ui_items.setFocusPolicy(QtCore.Qt.NoFocus)
self.ui_items.header().setResizeMode(QtGui.QHeaderView.ResizeToContents)
self.ui_items.header().setStretchLastSection(False)
self.uiGenerateAssets = QtGui.QPushButton("Generate")
self.uiRunRenamer = QtGui.QPushButton("Apply")
# layout: controls
gdl = QtGui.QGridLayout()
gdl.setContentsMargins(10, 5, 10, 5)
gdl.addWidget(lbAssetClass, 0, 0)
gdl.addWidget(self.uiAssetClass, 0, 1)
gdl.addWidget(lbAssetName, 1, 0)
gdl.addWidget(self.uiAssetName, 1, 1)
gdl.addWidget(lbAssetDescription, 2, 0)
gdl.addWidget(self.uiAssetDescription, 2, 1)
gdl.addWidget(self.ui_items, 3, 0, 1, 2)
gdl.addWidget(self.uiGenerateAssets, 4, 0, 1, 1)
gdl.addWidget(self.uiRunRenamer, 4, 1, 1, 1)
# main layout
main_widget = QtGui.QWidget()
main_widget.setLayout(gdl)
self.setCentralWidget(main_widget)
for c in AssetClasses:
self.uiAssetClass.addItem(c, AssetClasses[c])
self.uiAssetClass.currentIndexChanged.connect(self.generate_names)
self.uiAssetClass.setCurrentIndex(6)
# actions
self.uiAssetName.textChanged.connect(self.generate_names)
self.uiAssetDescription.textChanged.connect(self.generate_names)
self.uiRunRenamer.clicked.connect(self.setNewNames)
self.uiGenerateAssets.clicked.connect(self.generateAssets)
self.generateAssets()
def generateAssets(self):
print("generate new assets")
items = [
'Football', 'Steve', 'Basketball', 'Grag', 'Badminton', 'Boris', 'Red Lamp', 'Ann', 'PinSpot', 'Diana', 'Soccer', 'Jogn', 'Ferrari', 'Aziz', 'Train', 'Asef', 'Cat', 'Arnold', 'IceHockey', 'Dimitras', 'Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado', 'Connecticut', 'Delaware', 'District of Columbia', 'Florida', 'Georgia', 'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire', 'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island', 'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming', 'Afghanistan', 'Albania', 'Algeria', 'American Samoa', 'Andorra', 'Angola', 'Anguilla', 'Antarctica', 'Antigua and Barbuda', 'Argentina', 'Armenia', 'Aruba', 'Australia', 'Austria', 'Azerbaijan', 'Bahamas', 'Bahrain', 'Bangladesh', 'Barbados', 'Belarus', 'Belgium', 'Belize', 'Benin', 'Bermuda', 'Bhutan', 'Bolivia', 'Bosnia and Herzegovina', 'Botswana', 'Bouvet Island', 'Brazil', 'British Indian Ocean Territory', 'Brunei Darussalam', 'Bulgaria', 'Burkina Faso', 'Burundi', 'Cambodia', 'Cameroon', 'Canada', 'Cape Verde', 'Cayman Islands', 'Central African Republic', 'Chad', 'Chile', 'China', 'Christmas Island', 'Cocos (Keeling) Islands', 'Colombia', 'Comoros', 'Congo', 'Congo', 'The Democratic Republic of The', 'Cook Islands', 'Costa Rica', 'Cote Divoire', 'Croatia', 'Cuba', 'Cyprus', 'Czech Republic', 'Denmark', 'Djibouti', 'Dominica', 'Dominican Republic', 'Ecuador', 'Egypt', 'El Salvador', 'Equatorial Guinea', 'Eritrea', 'Estonia', 'Ethiopia', 'Falkland Islands (Malvinas)', 'Faroe Islands', 'Fiji', 'Finland', 'France', 'French Guiana', 'French Polynesia', 'French Southern Territories', 'Gabon', 'Gambia', 'Georgia', 'Germany', 'Ghana', 'Gibraltar', 'Greece', 'Greenland', 'Grenada', 'Guadeloupe', 'Guam', 'Guatemala', 'Guinea', 'Guinea-bissau', 'Guyana', 'Haiti', 'Heard Island and Mcdonald Islands', 'Holy See (Vatican City State)', 'Honduras', 'Hong Kong', 'Hungary', 'Iceland', 'India', 'Indonesia', 'Iran', 'Islamic Republic of', 'Iraq', 'Ireland', 'Israel', 'Italy', 'Jamaica', 'Japan', 'Jordan', 'Kazakhstan', 'Kenya', 'Kiribati', 'Korea', 'Democratic Peoples Republic of', 'Korea', 'Republic of', 'Kuwait', 'Kyrgyzstan', 'Lao Peoples Democratic Republic', 'Latvia', 'Lebanon', 'Lesotho', 'Liberia', 'Libyan Arab Jamahiriya', 'Liechtenstein', 'Lithuania', 'Luxembourg', 'Macao', 'Macedonia', 'The Former Yugoslav Republic of', 'Madagascar', 'Malawi', 'Malaysia', 'Maldives', 'Mali', 'Malta', 'Marshall Islands', 'Martinique', 'Mauritania', 'Mauritius', 'Mayotte', 'Mexico', 'Micronesia', 'Federated States of', 'Moldova', 'Republic of', 'Monaco', 'Mongolia', 'Montserrat', 'Morocco', 'Mozambique', 'Myanmar', 'Namibia', 'Nauru', 'Nepal', 'Netherlands', 'Netherlands Antilles', 'New Caledonia', 'New Zealand', 'Nicaragua', 'Niger', 'Nigeria', 'Niue', 'Norfolk Island', 'Northern Mariana Islands', 'Norway', 'Oman', 'Pakistan', 'Palau', 'Palestinian Territory', 'Occupied', 'Panama', 'Papua New Guinea', 'Paraguay', 'Peru', 'Philippines', 'Pitcairn', 'Poland', 'Portugal', 'Puerto Rico', 'Qatar', 'Reunion', 'Romania', 'Russian Federation', 'Rwanda', 'Saint Helena', 'Saint Kitts and Nevis', 'Saint Lucia', 'Saint Pierre and Miquelon', 'Saint Vincent and The Grenadines', 'Samoa', 'San Marino', 'Sao Tome and Principe', 'Saudi Arabia', 'Senegal', 'Serbia and Montenegro', 'Seychelles', 'Sierra Leone', 'Singapore', 'Slovakia', 'Slovenia', 'Solomon Islands', 'Somalia', 'South Africa', 'South Georgia and The South Sandwich Islands', 'Spain', 'Sri Lanka', 'Sudan', 'Suriname', 'Svalbard and Jan Mayen', 'Swaziland', 'Sweden', 'Switzerland', 'Syrian Arab Republic', 'Taiwan', 'Province of China', 'Tajikistan', 'Tanzania', 'United Republic of', 'Thailand', 'Timor-leste', 'Togo', 'Tokelau', 'Tonga', 'Trinidad and Tobago', 'Tunisia', 'Turkey', 'Turkmenistan', 'Turks and Caicos Islands', 'Tuvalu', 'Uganda', 'Ukraine', 'United Arab Emirates', 'United Kingdom', 'United States', 'United States Minor Outlying Islands', 'Uruguay', 'Uzbekistan', 'Vanuatu', 'Venezuela', 'Viet Nam', 'Virgin Islands', 'British', 'Virgin Islands', 'U.S.', 'Wallis and Futuna', 'Western Sahara', 'Yemen', 'Zambia', 'Zimbabwe'
]
model = self.ui_items.model()
model.clear()
columns = ["Name","New Name"]
model.setHorizontalHeaderLabels(columns)
random.seed()
for name in random.sample(items, random.randint(1, len(items))):
obj = Asset(name)
model.insertRow(0)
model.setData(model.index(0, 0), obj.name)
model.setData(model.index(0, 1), obj.newname)
# Append peson data
model.setData(model.index(0, 0), obj, role=QtCore.Qt.UserRole)
model.setData(model.index(0, 1),
QtGui.QBrush(QtGui.QColor(50, 80, 190, 255)),
QtCore.Qt.ForegroundRole)
self.generate_names()
def setNewNames(self):
print("apply new names")
model = self.ui_items.model()
for i in range(model.rowCount()):
sidx = model.index(i, 1,
parent=QtCore.QModelIndex())
didx = model.index(i, 0,
parent=QtCore.QModelIndex())
if sidx.isValid() and didx.isValid():
model.setData(didx, sidx.data())
data = didx.data(role=QtCore.Qt.UserRole)
if isinstance(data, Person):
print(i + 1, data)
def generate_names(self):
index = self.uiAssetClass.currentIndex()
assetCode = str(self.uiAssetClass.itemData(index))
items = [assetCode, self.uiAssetName.text(),
self.uiAssetDescription.text()]
items = list(filter(lambda x: x, items))
name_template = '_'.join(items)
print('NT: {}'.format(name_template))
self.set_new_names(name_template)
def set_new_names(self, template):
model = self.ui_items.model()
names = {}
for i in range(model.rowCount()):
if template not in names:
names[template] = []
names[template].append(model.index(i, 1,
parent=QtCore.QModelIndex()))
# Set names
for tmpl, items in names.items():
for idx, item in enumerate(items):
if item.isValid():
suffix = '_{:03d}'.format(idx+1)
if len(items) == 1:
suffix = ''
model.setData(item, '{}{}'.format(tmpl, suffix))
# Main
# -----------------------------------------------------------------------------
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
window = PSRenamer()
window.show()
app.exec_()
您默认启用列排序和调整大小。这意味着每次更改一行时，整个列表都会重新排序和调整大小。显然，如果列表相当长，这绝对会降低性能。
解决方案是关闭默认 sorting/resizing 并仅在重新填充列表后应用它：
class PSRenamer(QtGui.QMainWindow):
def __init__(self):
...
self.ui_items.setModel(self._model)
# self.ui_items.setSortingEnabled(True)
# self.ui_items.sortByColumn(0, QtCore.Qt.AscendingOrder)
self.ui_items.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
self.ui_items.setSelectionMode(QtGui.QAbstractItemView.NoSelection)
self.ui_items.setFocusPolicy(QtCore.Qt.NoFocus)
# self.ui_items.header().setResizeMode(QtGui.QHeaderView.ResizeToContents)
self.ui_items.header().setStretchLastSection(False)
def set_new_names(self, template):
self.ui_items.setSortingEnabled(False)
...
# Set names
...
self.ui_items.setSortingEnabled(True)
self.ui_items.sortByColumn(0, QtCore.Qt.AscendingOrder)
self.ui_items.header().resizeSections(QtGui.QHeaderView.ResizeToContents)