c++qtqdomdocument
Qt c++ data from XML String not being displayed properly in QTableView after parsing
I have almost finished the program in this question, but the last problem right now is this:
There is missing information within the QTableView.
Below is the new code I have: (the header file and the input xml string is the same as in the question mentioned in the first line)
//mainwindow.cpp
#include "mainwindow.h"
#include <QLabel>
#include <QLayout>
#include <QDebug>
#include <QDomDocument>
#include <QRegularExpression>
static QRegularExpression Box_Code("B");
static QRegularExpression Cylinder_Code("C");
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent),
SServer(new QPushButton("Start Listening")),
ContainerView(new QTableView),
tcpServer(new QTcpServer),
tcpSocket(new QTcpSocket)
{
QStringList HeaderRow;
HMod = new QStandardItemModel(this);
HeaderRow.append("Pallet");
HeaderRow.append("Container");
HeaderRow.append("Code");
HeaderRow.append("Height");
HeaderRow.append("Breadth/Diameter");
HeaderRow.append("Length");
HeaderRow.append("Weight");
HMod->setHorizontalHeaderLabels(HeaderRow);
ContainerView->setModel(HMod);
setWindowTitle("QTcpServer XML String Input");
resize(800,300);
connect(SServer, &QPushButton::clicked, this, &MainWindow::startServer);
connect(tcpServer, &QTcpServer::newConnection, this, &MainWindow::handleConnection);
connect(tcpSocket, &QTcpSocket::readyRead, this, &MainWindow::handleConnection);
connect(HMod, SIGNAL(itemchanged(QStandardItem*)), this, SLOT(updateRow(QStandardItem*)));
QLabel *Lab1(new QLabel("Listening on Port 6164"));
QHBoxLayout *HB(new QHBoxLayout);
QVBoxLayout *VB(new QVBoxLayout);
HB->addWidget(SServer);
HB->addWidget(Lab1);
VB->addItem(HB);
VB->addWidget(ContainerView);
QWidget *window(new QWidget);
window->setLayout(VB);
setCentralWidget(window);
}
MainWindow::~MainWindow()
{
}
void MainWindow::startServer()
{
if(!tcpServer->listen(QHostAddress::LocalHost, 6164)){
qDebug() << "Error connecting to Server";
tcpServer->close();
return;
} else {
qDebug() << "Started Successfully";
}
}
void MainWindow::handleConnection()
{
tcpSocket = tcpServer->nextPendingConnection();
qDebug() << "New Connection!";
connect(tcpSocket, &QTcpSocket::readyRead, this, &MainWindow::readMessage);
}
void MainWindow::readMessage()
{
ContainerView->clearSpans(); //clear table to prepare for new XMLString
QByteArray buffer = tcpSocket->readAll();
QString FromContainer = QString::fromUtf8(buffer);
ReadXML(FromContainer);
}
void MainWindow::ReadXML(QString XMLString)
{
QDomDocument Xml_String;
Xml_String.setContent(XMLString);
QDomElement Xml_Root = Xml_String.documentElement();
if(Xml_Root.tagName() == "Pallets")
{
QDomElement Xml_Pallet = Xml_Root.firstChildElement();
while(!Xml_Pallet.isNull())
{
if(Xml_Pallet.tagName() == "Pallet")
{
int PN = Xml_Pallet.attribute("Number").toInt(nullptr,10);
QDomElement Box_Cyl = Xml_Pallet.firstChildElement();
while(!Box_Cyl.isNull())
{
if(Box_Cyl.tagName() == "Box")
{
QString BC = Box_Cyl.tagName();
QDomElement Box_Info = Box_Cyl.firstChildElement();
QString BCode = "";
int BH, BL, BB, BW;
while(!Box_Info.isNull())
{
if(Box_Info.tagName() == "Code")
{
BCode = Box_Info.text();
}
if(Box_Info.tagName() == "Height")
{
BH = Box_Info.text().toInt(nullptr,10);
}
if(Box_Info.tagName() == "Length")
{
BL = Box_Info.text().toInt(nullptr, 10);
}
if(Box_Info.tagName() == "Breadth")
{
BB = Box_Info.text().toInt(nullptr,10);
}
if(Box_Info.tagName() == "Weight")
{
BW = Box_Info.text().toInt(nullptr, 10);
}
Box_Info = Box_Info.nextSiblingElement();
}
Add_to_CV(BCode, BC, PN, BH, BB, BL, BW);
} else if(Box_Cyl.tagName() == "Cylinder")
{
QString CC = Box_Cyl.tagName();
QDomElement Cylinder_Info = Box_Cyl.firstChildElement();
QString CCode ="";
int CH, CD, CW;
while(!Cylinder_Info.isNull())
{
if(Cylinder_Info.tagName() == "Code")
{
CCode = Cylinder_Info.text();
}else if(Cylinder_Info.tagName() == "Height")
{
CH = Cylinder_Info.text().toInt(nullptr,10);
} else if(Cylinder_Info.tagName() == "Diameter")
{
CD = Cylinder_Info.text().toInt(nullptr,10);
} else if(Cylinder_Info.tagName() == "Weight")
{
CW = Cylinder_Info.text().toInt(nullptr, 10);
}
Cylinder_Info = Cylinder_Info.nextSiblingElement();
}
Add_to_CV(CCode, CC, PN, CH, CD, CW);
}
Box_Cyl = Box_Cyl.nextSiblingElement();
}
}
Xml_Pallet = Xml_Pallet.nextSiblingElement();
}
}
}
void MainWindow::Add_to_CV(QString C, QString Con, int Pn, int Bh, int Bb, int Bl, int Bw)
{
QList<QStandardItem*> row;
QStandardItem *Pallet_Num_Item = new QStandardItem(Pn);
QStandardItem *Container_Type = new QStandardItem(Con);
QStandardItem *Box_Code = new QStandardItem(C);
QStandardItem *Box_Height = new QStandardItem(Bh);
QStandardItem *Box_Breadth = new QStandardItem(Bb);
QStandardItem *Box_Length = new QStandardItem(Bl);
QStandardItem *Box_Weight = new QStandardItem(Bw);
row << Pallet_Num_Item << Container_Type << Box_Code << Box_Height << Box_Breadth << Box_Length << Box_Weight;
HMod->appendRow(row);
}
void MainWindow::Add_to_CV(QString C, QString Con, int Pn, int Ch, int Cd, int Cw)
{
QList<QStandardItem*> row;
QStandardItem *Pallet_Num_Item = new QStandardItem(Pn);
QStandardItem *Container_Type = new QStandardItem(Con);
QStandardItem *Cylinder_Code = new QStandardItem(C);
QStandardItem *Cylinder_Height = new QStandardItem(Ch);
QStandardItem *Cylinder_Diameter = new QStandardItem(Cd);
QStandardItem *Cylinder_Blank = new QStandardItem(" "); //Cylinder does not have a Length
QStandardItem *Cylinder_Weight = new QStandardItem(Cw);
row <<Pallet_Num_Item << Container_Type << Cylinder_Code << Cylinder_Height << Cylinder_Diameter << Cylinder_Blank << Cylinder_Weight;
HMod->appendRow(row);
}
void MainWindow::updateRow(QStandardItem *item)
{
QColor colour = Qt::white;
int row = item->row();
if (HMod->item(row, 2)->data(Qt::DisplayRole).toFloat() >= 200)
colour = Qt::red;
for (int col=0; col<4; col++)
HMod->item(row, col)->setBackground(colour);
}
Currently, this gives the the following output:
If I alter the program so that ContainerView is a QTextEdit instead of a QTableView (I did this to troubleshoot so I know which values are not getting assigned a value), and then use the following code instead:
...
while(!Box_Info.isNull())
{
if(Box_Info.tagName() == "Code")
{
BCode = Box_Info.text();
ContainerView->append("Box Code: " + BCode);
}
if(Box_Info.tagName() == "Height")
{
BH = Box_Info.text().toInt(nullptr,10);
ContainerView->append("Box Height: " + QString::number(BH));
}
etc.
...
Then I get the following output:
Solution
Thanks for the Comment, Scheff's Cat.
My mistake was indeed in the Add_to_CV function.
It should have been:
void MainWindow::Add_to_CV(QString C, QString Con, int Pn, int Bh, int Bb, int Bl, int Bw)
{
QList<QStandardItem*> row;
QStandardItem *Pallet_Num_Item = new QStandardItem(QString::number(Pn));
QStandardItem *Container_Type = new QStandardItem(Con);
QStandardItem *Box_Code = new QStandardItem(C);
QStandardItem *Box_Height = new QStandardItem(QString::number(Bh));
QStandardItem *Box_Breadth = new QStandardItem(QString::number(Bb));
QStandardItem *Box_Length = new QStandardItem(QString::number(Bl));
QStandardItem *Box_Weight = new QStandardItem(QString::number(Bw));
row << Pallet_Num_Item << Container_Type << Box_Code << Box_Height << Box_Breadth << Box_Length << Box_Weight;
HMod->appendRow(row);
}
void MainWindow::Add_to_CV(QString C, QString Con, int Pn, int Ch, int Cd, int Cw)
{
QList<QStandardItem*> row;
QStandardItem *Pallet_Num_Item = new QStandardItem(QString::number(Pn));
QStandardItem *Container_Type = new QStandardItem(Con);
QStandardItem *Cylinder_Code = new QStandardItem(C);
QStandardItem *Cylinder_Height = new QStandardItem(QString::number(Ch));
QStandardItem *Cylinder_Diameter = new QStandardItem(QString::number(Cd));
QStandardItem *Cylinder_Blank = new QStandardItem(" "); //Cylinder does not have a Length
QStandardItem *Cylinder_Weight = new QStandardItem(QString::number(Cw));
row <<Pallet_Num_Item << Container_Type << Cylinder_Code << Cylinder_Height << Cylinder_Diameter << Cylinder_Blank << Cylinder_Weight;
HMod->appendRow(row);
}
When initializing the QStandardItem's, it needed to instantiate them using an QString. I had them being initialized using an int.
Thanks for the help.
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