我无法获取要在我的QML TableView上显示的数据。我定义了两个数组-标头和行,它们希望在TableView上显示,但到目前为止没有成功。下面是最小的可复制示例。
engine.py
import os
import sys
from PySide2 import QtCore, QtGui, QtSql, QtQml
from Table import TbModel
from PySide2.QtWidgets import QApplication
if __name__ == "__main__":
current_dir = os.path.dirname(os.path.realpath(__file__))
app = QApplication(sys.argv)
QtQml.qmlRegisterType(TbModel, "TbModel", 1, 0, "TbModel")
engine = QtQml.QQmlApplicationEngine()
qml_path = os.path.join( "main.qml")
engine.load(QtCore.QUrl.fromLocalFile(qml_path))
if not engine.rootObjects():
sys.exit(-1)
sys.exit(app.exec_())
main.qml
import QtQuick 2.13
import QtQuick.Window 2.2
import QtQuick.Controls 2.5
import QtQuick.Controls 1.4
import QtQuick.Controls 2.13
import TbModel 1.0
ApplicationWindow {
visible: true
id: window
width: Screen.width
height: Screen.height
Grid {
width: 300
height: 100
visible: true
spacing: 200
TableView
{
id: idtable
model: TbModel { }
TableViewColumn {
role: "sci"
title: "sci"
}
TableViewColumn {
role: "year"
title: "year"
}
TableViewColumn {
role: "cont"
title: "cont"
}
// Component.onCompleted: {
// var roles = model.roleNameArray()
// for (var i = 0; i < model.columnCount(); i++)
// {
// var column = addColumn( Qt.createQmlObject(
// "import QtQuick.Controls 1.1; TableViewColumn {}",
// this) )
// column.role=roles[i]
// column.title=roles[i]
// }
// }
}
}
}
Table.py
from PySide2.QtCore import QAbstractTableModel, QModelIndex, QObject, Qt
from PySide2 import QtCore
class TbModel(QAbstractTableModel):
def __init__(self, parent: QObject = None) -> None:
super().__init__(parent)
self.headers = ["sci", "year", "cont"]
self.rows = [("Newton", "1643-01-04", "Classical mechanics"),
("Einstein", "1879-03-14", "Relativity"),
("Darwin", "1809-02-12", "Evolution")]
def rowCount(self, parent=QModelIndex()):
return len(self.rows)
def columnCount(self, parent=QModelIndex()):
return len(self.headers)
def data(self, index, role):
if role != Qt.DisplayRole:
return None
return self.rows[index.row()][index.column()]
def headerData(self, section, orientation, role) :
if role != Qt.DisplayRole:
return None
if section < 0 or section >= len(self.headers):
return None
return self.headers[section]
def roleNames(self):
roles = {
Qt.UserRole + 1 : 'sci',
Qt.UserRole + 2 : 'year',
Qt.UserRole + 3 : 'cont'
}
return roles
@QtCore.Slot(result="QVariantList")
def roleNameArray(self):
names = []
names=self.headers
return names
我可以在TableView中选择行,但是看不到数据。任何帮助表示赞赏。
您的代码有2个错误:
在C ++中roleNames()
方法返回QHash<int, QByteArray>
,因此在Python中,您必须返回其键为整数且值必须为bytes
或QByteArray
的字典,但是在您的情况下,值是字符串。
数据方法必须提供视图所需的信息,在这种情况下,它们是与[sci],[year]和[cont]关联的角色,其值分别为Qt.UserRole + 1
,Qt.UserRole + 2
和[C0 ]与Qt.UserRole + 3
不同,但在您的逻辑中,除Qt.DisplayRole
以外的任何值都将与上述内容无矛盾。
更正前2个错误,然后的解决方法是:
Qt.DisplayRole
def data(self, index, role=Qt.DisplayRole):
if 0 <= index.row() < self.rowCount():
if 0 <= index.column() < self.columnCount():
if role in self.roleNames():
return self.rows[index.row()][index.column()]