Convert XML to QTreeView

[sergio87]

Hi all,

I read a very simple XML created by me. I parse it on a QDomDocument.

My XML is:

<?xml version='1.0' encoding='utf-8'?>
<data>
	<feature>
		<name>Sex</name>
		<value>Male</value>
		<value>Female</value>
		<value>Unknown</value>
	</feature>
	<feature>
		<name>Color</name>
		<value>Red</value>
		<value>Green</value>
		<value>Blue</value>
		<value>White</value>
		<value>Black</value>
		<value>Unknown</value>
	</feature>
	<feature>
		<name>Size</name>
		<value>Small</value>
		<value>Medium</value>
		<value>Large</value>
		<value>Unknown</value>
	</feature>
 
</data>

<?xml version='1.0' encoding='utf-8'?>
<data>
	<feature>
		<name>Sex</name>
		<value>Male</value>
		<value>Female</value>
		<value>Unknown</value>
	</feature>
	<feature>
		<name>Color</name>
		<value>Red</value>
		<value>Green</value>
		<value>Blue</value>
		<value>White</value>
		<value>Black</value>
		<value>Unknown</value>
	</feature>
	<feature>
		<name>Size</name>
		<value>Small</value>
		<value>Medium</value>
		<value>Large</value>
		<value>Unknown</value>
	</feature>

</data>

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I parse the XML:

QDomDocument doc("mydocument");
	QFile file("metadata.xml");
	if (!file.open(QIODevice::ReadOnly)){
		cout<< "ERROR"<< endl;
		return;
	}
	if (!doc.setContent(&file)) {
		cout << "ERROR" << endl;
		file.close();
		return;
	}
	file.close();

QDomDocument doc("mydocument");
	QFile file("metadata.xml");
	if (!file.open(QIODevice::ReadOnly)){
		cout<< "ERROR"<< endl;
		return;
	}
	if (!doc.setContent(&file)) {
		cout << "ERROR" << endl;
		file.close();
		return;
	}
	file.close();

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So, I want to show the XML in a QTreeView.To do that, I have to create a QStandardItemModel. ¿Any ideas?

My idea is something like this:

void MainWindow::preOrder(QDomNode dom, QStandardItemModel *model, int row){
	if(!dom.isNull()){
		int nRow = row+1;
		string aux = dom.nodeName().toStdString();
		string name = "name";
		string value = "value";
		if(dom.isText()){
			aux = dom.parentNode().nodeName().toStdString();
			if(strcmp(aux.c_str(),name.c_str())==0){
				cout << dom.nodeValue().toStdString() << endl;
				//New ROW
				SubQStandardItem *item = new SubQStandardItem(dom.nodeValue());
				item->setEditable(false);
				model->setItem(nRow, item);
			}
			if(strcmp(aux.c_str(),value.c_str())==0){
				//New SubItems
				cout << "\t" << dom.nodeValue().toStdString() << endl;
				SubQStandardItem *subItem = new SubQStandardItem( dom.nodeValue() );
				subItem->setCheckable(true);
				subItem->setEditable(false); 
			}
		}else{
			preOrder(dom.firstChild(), model, nRow);
			preOrder(dom.nextSibling(), model, nRow);
		}
 
	}
}

void MainWindow::preOrder(QDomNode dom, QStandardItemModel *model, int row){
	if(!dom.isNull()){
		int nRow = row+1;
		string aux = dom.nodeName().toStdString();
		string name = "name";
		string value = "value";
		if(dom.isText()){
			aux = dom.parentNode().nodeName().toStdString();
			if(strcmp(aux.c_str(),name.c_str())==0){
				cout << dom.nodeValue().toStdString() << endl;
				//New ROW
				SubQStandardItem *item = new SubQStandardItem(dom.nodeValue());
				item->setEditable(false);
				model->setItem(nRow, item);
			}
			if(strcmp(aux.c_str(),value.c_str())==0){
				//New SubItems
				cout << "\t" << dom.nodeValue().toStdString() << endl;
				SubQStandardItem *subItem = new SubQStandardItem( dom.nodeValue() );
				subItem->setCheckable(true);
				subItem->setEditable(false); 
			}
		}else{
			preOrder(dom.firstChild(), model, nRow);
			preOrder(dom.nextSibling(), model, nRow);
		}

	}
}

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This code (not work...) is based on the pre-order algorithm.

Please help!!!

Thanks in advance!!!!

[sergio87]

Hi all,

I solved it!

My solution is very simple and it works well for my xml. The code is:

void MainWindow::startTree(){
	QDomDocument doc("mydocument");
	QFile file("metadata.xml");
	if (!file.open(QIODevice::ReadOnly)){
		cout<< "ERROR"<< endl;
		return;
	}
	if (!doc.setContent(&file)) {
		cout << "ERROR" << endl;
		file.close();
		return;
	}
	file.close();
	QStandardItemModel *model = new QStandardItemModel();
	preOrder(doc.firstChild(), model);
	view = new QTreeView(centralWidget);
	view->setModel(model);
	view->show();
 
}
 
void MainWindow::insertFather(QString name){
	item = new QStandardItem(name);
	item->setEditable(false);
}
 
void MainWindow::insertChildren(QString name){
	QStandardItem *subItem = new QStandardItem( name );
	subItem->setCheckable(true);
	subItem->setEditable(false);
	item->appendRow(subItem);
}
 
void MainWindow::setItem(QStandardItemModel *model){
	model->setItem(nRow, item);
	nRow++;
}
 
void MainWindow::preOrder(QDomNode dom, QStandardItemModel *model){
	if(!dom.isNull()){
		string aux = dom.nodeName().toStdString();
		string name = "name";
		string value = "value";
		if(dom.isText()){
			aux = dom.parentNode().nodeName().toStdString();
			if(strcmp(aux.c_str(),name.c_str())==0){
				cout << dom.nodeValue().toStdString() << endl;
				insertFather(dom.nodeValue());
				setItem(model);
			}
			if(strcmp(aux.c_str(),value.c_str())==0){
				cout << "\t" << dom.nodeValue().toStdString() << endl;
				insertChildren(dom.nodeValue());
			}
		}else{
			preOrder(dom.firstChild(), model);
			preOrder(dom.nextSibling(), model);
		}
 
	}
}

void MainWindow::startTree(){
	QDomDocument doc("mydocument");
	QFile file("metadata.xml");
	if (!file.open(QIODevice::ReadOnly)){
		cout<< "ERROR"<< endl;
		return;
	}
	if (!doc.setContent(&file)) {
		cout << "ERROR" << endl;
		file.close();
		return;
	}
	file.close();
	QStandardItemModel *model = new QStandardItemModel();
	preOrder(doc.firstChild(), model);
	view = new QTreeView(centralWidget);
	view->setModel(model);
	view->show();

}

void MainWindow::insertFather(QString name){
	item = new QStandardItem(name);
	item->setEditable(false);
}

void MainWindow::insertChildren(QString name){
	QStandardItem *subItem = new QStandardItem( name );
	subItem->setCheckable(true);
	subItem->setEditable(false);
	item->appendRow(subItem);
}

void MainWindow::setItem(QStandardItemModel *model){
	model->setItem(nRow, item);
	nRow++;
}

void MainWindow::preOrder(QDomNode dom, QStandardItemModel *model){
	if(!dom.isNull()){
		string aux = dom.nodeName().toStdString();
		string name = "name";
		string value = "value";
		if(dom.isText()){
			aux = dom.parentNode().nodeName().toStdString();
			if(strcmp(aux.c_str(),name.c_str())==0){
				cout << dom.nodeValue().toStdString() << endl;
				insertFather(dom.nodeValue());
				setItem(model);
			}
			if(strcmp(aux.c_str(),value.c_str())==0){
				cout << "\t" << dom.nodeValue().toStdString() << endl;
				insertChildren(dom.nodeValue());
			}
		}else{
			preOrder(dom.firstChild(), model);
			preOrder(dom.nextSibling(), model);
		}

	}
}

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Where item and nRow are declared at header as private.

Hope it help you!!

Regards!