[英]How to connect QItemDelegate (QLineEdit) change to QSortFilterProxyModel PyQt4?
I tried to set a QlineEdit by subclassing QItemDelegate in first row of my QtableView: 我试图通过在QtableView的第一行中将QItemDelegate子类化来设置QlineEdit:
class ExampleDelegate(QItemDelegate):
def createEditor(self, parent, option, index):
self.line_edit = QLineEdit(parent)
return self.line_edit
class example(QDialog):
def __init__(self):
super(druglist, self).__init__()
self.UI()
def UI(self):
self.table_view=QTableView()
self.delegate = ExampleDelegate()
self.table_view.setItemDelegateForColumn(0, self.delegate)
self.table_model=QStandardItemModel()
self.table_proxy=QSortFilterProxyModel()
self.table_proxy.setSourceModel(self.table_model)
self.table_view.setModel(self.table_proxy)
self.delegate.textChanged.connect(self.lineedit_textchange) //do something like this
def lineedit_textchange(self,text):
search=QRegExp(text,Qt.CaseInsensitive,QRegExp.RegExp)
self.table_proxy_model.setFilterRegExp(search)
I just want to know how could I connect my ExampleDelegate
text change to my lineedit_textchange
function in main class? 我只想知道如何将我的ExampleDelegate
文本更改连接到主类中的lineedit_textchange
函数?
You should not connect to the line_edit
in the delegate. 您不应该连接到委托中的line_edit
。 The delegate is here to set a custom editor in multiple cells of your QTableView
(here all the cells in column 0). 委托是在QTableView
多个单元格(此处是第0列中的所有单元格)中设置自定义编辑器的步骤。 If you could connect to the line_edit
in the delegate, how would you know which cell has been changed ? 如果您可以连接到委托中的line_edit
,您将如何知道哪个单元已更改?
What you want is to know when a cell in the column 0 has been changed. 您想知道何时更改了列0中的单元格。 Every model has the dataChanged
signal: 每个模型都有dataChanged
信号:
void QAbstractItemModel::dataChanged(const QModelIndex & topLeft, const QModelIndex & bottomRight) 无效的QAbstractItemModel :: dataChanged(const QModelIndex&topLeft,const QModelIndex&bottomRight)
This signal is emitted whenever the data in an existing item changes. 只要现有项目中的数据发生更改,就会发出此信号。
You can connect to this signal to get the index of a cell that just changed. 您可以连接到该信号以获得刚刚更改的单元格的索引。 You can check whether this cell is in column 0, and proceed accordingly: 您可以检查此单元格是否在第0列中,然后进行相应的操作:
def UI(self):
self.model=QStandardItemModel(4,2)
self.model.dataChanged.connect(self.on_dataChanged)
self.delegate=Delegate()
self.view=QTableView()
self.view.setItemDelegateForColumn(0,self.delegate)
self.view.setModel(self.model)
def on_dataChanged(self,index,index2):
print(index,index2)
print(index.data())
print(index.column())
if index==index2 and index.column()==0:
#do stuff
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