searching for a particular entry in a table by qlineedit? - qt

Question

What i want is that if i enter an ID in the textbox and then press enter,then if the ID is present ,then it gets displayed on the table the valuesof the table are inserted with the help of map in another window from which this window Box1 is opened as map.So as far as i have an idea,we have to run find command of map and then using if loop if that entered value in textbox is presentthen will display it in the same way as dummy data is displayed.
code used
Box1::Box1(QWidget *parent)
:QDialog(parent)
{
searchgroup = new QGroupBox(tr("Data Search"));
QHBoxLayout *layout2 = new QHBoxLayout;
text = new QLineEdit(this);
searchh = new QLabel(tr("&Enter ID:"));
searchh->setBuddy(text);
layout2->addWidget(searchh);
layout2->addWidget(text);
searchgroup->setLayout(layout2);
tableegroup = new QGroupBox(tr("Searched Data"));
QVBoxLayout *layout1 = new QVBoxLayout;
tablee = new QTableView(this);
mode1 = new QStandardItemModel(1,2,this);
mode1->setHorizontalHeaderItem(0, new QStandardItem(QString("ID")));
mode1->setHorizontalHeaderItem(1, new QStandardItem(QString("DATA")));
map<int,QString>::iterator itt;
itt=dataa.begin();
for (int colu = 0; colu < 2; colu++)
{
item1 = new QStandardItem();
if (colu == 0)
{
item1->setData(((*itt).first), Qt::DisplayRole);
mode1->setItem(0,0,item1);
} else
{
item1->setData(((*itt).second), Qt::DisplayRole);
mode1->setItem(0,1,item1);
}
}
tablee->setModel(mode1);
layout1->addWidget(tablee);
tableegroup->setLayout(layout1);
QVBoxLayout *mainlayout1 = new QVBoxLayout;
//mainlayout1->addWidget(menubarr);
mainlayout1->addWidget(searchgroup);
mainlayout1->addWidget(tableegroup);
setLayout(mainlayout1);
}
Thanks for any help in advance
EDIT
what i want
void Box1::textReturn()
{
bool ok;
int id = text->text().toInt(&ok);
// map<int,QString>::iterator itt;
if (ok && dataa.contains(id))
{
// add row (id, data[id] to table
}
else
{
QMessageBox msgbox = new QMessagebox();
msgbox->setWindowTitle("Alert");
msgbox->setText("No such ID present!");
msgbox->show();
}
}
EDIT2
void Box1::textReturn()
{
int id = (text->text()).toInt();
map<int,QString>::iterator itt;
itt = dataa.find(id);
if(itt != dataa.end()) //returns 1 if we found something
{
QList<QStandardItem *> items;
items << new QStandardItem(QString("%1").arg(id));
items << new QStandardItem((*itt).second);
mode1->appendRow(items);
tablee->update();
}
else
{
QMessageBox *msgbox = new QMessageBox();
msgbox->setWindowTitle("Alert");
msgbox->setText("INVALID ID ENTERED");
msgbox->show();
}
}

Answer 1

As #KCiebiera said, you have to do this connection
connect(text, SIGNAL(returnPressed()), this, SLOT(textReturnPressed());
Then you need to find your key in the table using
QList<QStandardItem *> QStandardItemModel::findItems ( const QString & text,
Qt::MatchFlags flags = Qt::MatchExactly, int column = 0 )
As you have map, so elements shouldn't repeat, your QList should be NULL or contains just one element. When u'll get your element (as QStandardItem) you just need to invoke
tablee->showColumn ( int column )
tablee->showRow ( int row )
Where your column will be QStandarItem->column() and row QStandardItem->row();
EDIT
void Box1::textReturnPressed()
{
int id = (test->text()).toInt();
map<int, string>::iterator it;
it = dataa.find(id);
if(it != dataa.end()) //we found something
{
QList<QStandardItem *> items;
items << new QStandardItem(QString("%1").arg(id));
items << new QStandardItem((*it).second);
mode1->appendRow(items);
}
else
QMessageBox::information(this, "Info", "ID not found!", QMessageBox::ok);
}
Something like this;

Answer 2

As far as I understand your question. You need to create a new slot in the Box1 class. Let's call it textReturnPressed(). Then you have to connect it to returnPressed() signal from text
connect(text, SIGNAL(returnPressed()), this, SLOT(textReturnPressed());
and here is textReturnPressed (I hope it compiles)
void textReturnPressed()
{
bool ok;
int id = text->text().toInt(&ok);
if (ok && dataa.count(id) > 0) {
QList<QStandardItem *> items;
items << new QStandardItem(QString("%1").arg(id));
items << new QStandardItem(dataa[id]);
mode1.appendRow(items);
}
}
You don't need an iterator to check if an item is in the map. Just call map.count() function.