QTreeview model数据过滤：大小写区分，对列过滤，对子对象过滤

示例：

需要自定义QSortFilterProxyModel,

//自定义过滤model	
mProxyModel = new TreeFilterProxyModel(this);
//添加treeview当前model
mProxyModel->setSourceModel(model);
//设置过滤行
mProxyModel->setRxCol(col);
//设置过滤行
ui.treeView_3->setModel(mProxyModel);

对某一列过滤

void QTreeViewDemo::filterColumnChanged()
{
	QString str = ui.comboBox_2->currentText();
	int col = str.toInt();
	mProxyModel->setRxCol(col);
	mProxyModel->setFilterKeyColumn(col);
	ui.treeView_3->expandAll();
}

大小写过滤

void QTreeViewDemo::filterRegExpChanged()
{
	QString text = ui.lineEdit->text();
	QRegExp::PatternSyntax syntax = QRegExp::PatternSyntax(ui.comboBox->currentData().toInt());
	Qt::CaseSensitivity caseSensitivity = ui.checkBox->isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive;//Qt::CaseSensitive区分大小写 Qt::CaseInSensitive不区分大小写
	QRegExp regExp(text, Qt::CaseInsensitive, syntax);
	mProxyModel->setCase(caseSensitivity);
	mProxyModel->setRxText(text);
	mProxyModel->setFilterRegExp(regExp);
	ui.treeView_3->expandAll();
}