[SOLVED] Insert row from Qtableview to another

[advseo32]

Hi, every body

i have a probleme with inserting a row from a table call tableProduct to another table call tableSalle

when the user click entre key in the first table "tableProduct"

i can't figured out, how this work

i start using

@my@SalleModel->insertRow(tableProduct->currentIndex().row()) ;@

but not working

[advseo32]

i need some hints

[SGaist]

Hi,

If you want some hints you'll have to give more information like: the code you are using to add the row and set the data, what result you are having etc...

[advseo32]

@ bool Mymodel::insertRows(int position, int rows, const QModelIndex &parent)
{
beginInsertRows(QModelIndex(), position, position+rows-1);
// i want to get the event when the user click "Keydown"
if (true)
{
// we add row with empty fields to allow user to fill them
}

 endInsertRows();
 return true;

}@

her is an image that explain exacly what means!http://imageshack.us/photo/my-images/577/2ng9.png/(sell)!

[SGaist]

The link to your picture is broken. But it's not critical. If I've followed you correctly you are using a Sql database so just use a QSqlTableModel, they are designed for that and don't need to be subclassed (if you are not doing more than just modify the content of the database)

[advseo32]

Qsqltablemodel not working for me

check this image, my english is not good, to expalin more

http://mockupr.com/mu/mmfd6664

[SGaist]

If I understood your picture correctly, you want some sort of database record editor. Then use a QTableWidget, a QSqlTableModel would require that you have a table in your database for this.

[advseo32]

yes , the user fill row one by one , example for application that uses this kind of thing is " Inventory management system" like inflow inventory

[SGaist]

Well then, use a QTableWidget for the editing part, unless you have a special table in your database for that.

[advseo32]

but how row can be added automaticelly , " Firstly the table has one row
then the user fill that row, and when he clicks in Keydown, new row added

[advseo32]

i want to like the video,

https://www.youtube.com/watch?v=hkfmZwuc-YY

when the user entre data new row created

i can't post so i have modified this post

i can't control the addition of rows

her is my code

@#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
: QWidget(parent)
{

tableNouveau = new QTableWidget;
tableNouveau->setRowCount(1);
tableNouveau->setColumnCount(5);
QStringList list ;
list <<"N°"<<  "Désignation" << "Qte" << "Prix/U" << "Totale" ;
tableNouveau->setHorizontalHeaderLabels(list);
connect(tableNouveau,SIGNAL(cellClicked(int,int)),this,SLOT(test(int,int))) ;
QVBoxLayout *layoutPrincipale = new QVBoxLayout ;
layoutPrincipale->addWidget(tableNouveau);
setLayout(layoutPrincipale);

}

void MainWindow::test(int row, int col)
{
// if(!tableNouveau->item(row,col)->text().isEmpty())
if(col==1)
{
tableNouveau->insertRow(1);
}

}

MainWindow::~MainWindow()
{

}
@

[JKSH]

When the user enters data, the QTableWidget will emit some "signals":http://qt-project.org/doc/qt-5.1/qtwidgets/qtablewidget.html#signals. You should create your own slot to handle the signal(s) that you want.

Connect the signal to your slot. Inside your slot, call call "QTableWidget::insertRow()":http://qt-project.org/doc/qt-5.1/qtwidgets/qtablewidget.html#insertRow

[advseo32]

i can’t control the addition of rows

her is my code
@
#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QWidget(parent)
{
 
    tableNouveau = new QTableWidget;
    tableNouveau->setRowCount(1);
    tableNouveau->setColumnCount(5);
    QStringList list ;
    list <<"N°"<<  "Désignation" << "Qte" << "Prix/U" << "Totale" ;
    tableNouveau->setHorizontalHeaderLabels(list);
    connect(tableNouveau,SIGNAL(cellClicked(int,int)),this,SLOT(test(int,int))) ;
    QVBoxLayout *layoutPrincipale = new QVBoxLayout ;
    layoutPrincipale->addWidget(tableNouveau);
    setLayout(layoutPrincipale);
 
 
 
}
 
 
 
void MainWindow::test(int row, int col)
{
   // if(!tableNouveau->item(row,col)->text().isEmpty())
        if(col==1)
        {
            tableNouveau->insertRow(1);
        }
 
 
}
 
MainWindow::~MainWindow()
{
   
}

@

[SGaist]

What do you mean by "I can't control" ?

The code here will add a new row at row number 1 each time you click on a cell in the column 1.

[advseo32]

i want to add it at the end of the table every time

[SGaist]

Then change 1 by tableNouveau->rowCount()

[advseo32]

Wow, this works

Now, what i want exactly is

the user isn't able to add row until he fills all cells

then he clicks "Key_Down" to add new row ( so her i will catch Qkeypressevent)

Plz give somme hints, so i will try to implement this my selef and render the code for you to correct me

thank's a lot SGaist

[advseo32]

i have tried to inherif from Qtablewidget and override keypressevent function

i have declared keypressevent function as signal

it works with this condition
@if ( event->key() == Qt::key_Down)@

but when i add more conditions the app crached

her is my code

customtablewidget class @class MonTableauWidget : public QTableWidget
{
Q_OBJECT
public:
explicit MonTableauWidget(QWidget *parent = 0);

signals:
void keyPressEvent(QKeyEvent *event);
public slots:

};
@

the main of classe @#include "montableauwidget.h"

MonTableauWidget::MonTableauWidget(QWidget *parent) :
QTableWidget(parent)
{

}

@

and her is my main where i tried to connect siganl with slot @#include "dialog.h"

Dialog::Dialog(QWidget *parent)
: QWidget(parent)
{
layoutPrincipale = new QVBoxLayout(this);
QPushButton *button = new QPushButton("Clear",this);
tableau = new MonTableauWidget(this);
tableau->setRowCount(1);
tableau->setColumnCount(4) ;
QKeyEvent event(QEvent::KeyPress, Qt::Key_Down, Qt::NoModifier);

QStringList list ;
list << "Désignation" << "Qte" << "Prix/U" << "Total";
tableau->setHorizontalHeaderLabels(list);
layoutPrincipale->addWidget(tableau);
layoutPrincipale->addWidget(button);
setLayout(layoutPrincipale);
connect(tableau,SIGNAL(cellChanged(int,int)),this,SLOT(addrow(int,int))) ;
connect(tableau,SIGNAL(keyPressEvent(QKeyEvent*)),this,SLOT(newRecod(QKeyEvent*)));
connect(button,SIGNAL(clicked()),tableau,SLOT(clear()));

}

Dialog::~Dialog()
{

}

void Dialog::addrow(int row, int col)
{
if(col == 0)
tableau->insertRow(tableau->rowCount());
}
// her is the problem
void Dialog::newRecod(QKeyEvent *record)
{
QModelIndex index = tableau->currentIndex();
int row = index.column();
if(record->key() == Qt::Key_Down)
if(tableau->item(row,0)->text().isEmpty())
QMessageBox::information(this,"Empty Designation","Please Fill in the cell");
else
tableau->insertRow(tableau->rowCount());
}

@

[SGaist]

keyPressEvent is not a signal, I would advise you to read its "documentation":http://qt-project.org/doc/qt-4.8/qabstractitemview.html#keyPressEvent

From your previous posts, and just to be sure, do you expect me to validate your work ?

[advseo32]

bq. From your previous posts, and just to be sure, do you expect me to validate your work ?

sorry about that, i'm completely newbie , i have blocked to get a solution for my probelem to complete my first application

[advseo32]

if i can't use keypressevent() as a signal

how i can handle this event " when the uesr click Key_Down new row added in the bottom "

[SGaist]

It is explained in the function documentation

[advseo32]

i still can't know what i do ,

subclass Qtablewidget and implement keypressevent
or use shortcuts .

[SGaist]

You can also use an event filter to catch that event, this really is up to you to choose the solution that meets your need

[advseo32]

i have implemented keypressEvent function

and it works perfectly, but when i start to somme conditions the programme crashes

her is my code @void MonTableauWidget::keyPressEvent(QKeyEvent *event)
{
int LastRow = this->rowCount();

switch (event->key()) {
case Qt::Key_Down :
// the problem occured  when i added the line below if(!this->item(LastRow,0)->text().isEmpty())
    this->insertRow(this->rowCount());
    break;
case Qt::Key_Up :
 this->removeRow(1);
    break;
case Qt::Key_0 :

    QMessageBox::information(this,"Row coutn",QString::number( LastRow)) ;
    break;
default:
    QTableWidget::keyPressEvent(event);
    break;
}

}
@

[SGaist]

@removeRow(1); << What would happen if you don't have a row number 1 ?@

[advseo32]

i have used the debugger to determine what's the issue
and i think the issue is located her
because when i delete this line every thing works perfectly
@this->item(LastRow,0)->text().isEmpty() ;@

this not refering to the customQtableWidget it's reffering to the
QtableWidgetItem objet

[advseo32]

[quote author="SGaist" date="1374875944"]@removeRow(1); << What would happen if you don't have a row number 1 ?@[/quote]

nothing is happened , means no row have to removed , but i have correct this issue

@this->removeRow(this->rowCount()-1); @
and this should works , and finally it works

thank's for the hint

[advseo32]

her is my finall code @void MonTableauWidget::keyPressEvent(QKeyEvent *event)
{
int LastRow = this->rowCount()-1;

// bool ok = this->item(LastRow,0)->text().isEmpty() ;

switch (event->key()) {
case Qt::Key_Down :
    if(LastRow)
        this->insertRow(this->rowCount());
    break;
case Qt::Key_Up :
 this->removeRow(LastRow);
    break;
default:
    QTableWidget::keyPressEvent(event);
    break;
}

@

[advseo32]

i lost hope to get the solution from my self,

the only problem now is how to test if Cell is Empty

i use this

@this->item(row,col)->text().isEmpty(); @

but the programme crashes , what the probleme her ??

[JKSH]

[quote author="advseo32" date="1374923562"]
@this->item(row,col)->text().isEmpty(); @

but the programme crashes , what the probleme her ??[/quote]If there is no data in the cell, then this->item() returns NULL.

Your program will crash if you dereference a null pointer.

[advseo32]

[quote author="JKSH" date="1374928103"][quote author="advseo32" date="1374923562"]
@this->item(row,col)->text().isEmpty(); @

but the programme crashes , what the probleme her ??[/quote]If there is no data in the cell, then this->item() returns NULL.

Your program will crash if you dereference a null pointer.

[/quote]

Yeah! that's true , because QTableWidgetItem was created only when the user fill in the cell

do you have another way to check if the cell if not empty

[JKSH]

[quote author="advseo32" date="1374942257"]do you have another way to check if the cell if not empty [/quote]If there is no data in the cell, then this->item() returns NULL :)

[advseo32]

[quote author="JKSH" date="1374942566"][quote author="advseo32" date="1374942257"]do you have another way to check if the cell if not empty [/quote]If there is no data in the cell, then this->item() returns NULL :)[/quote]

Probably , you have give the answer from the the begning , but i haven't pay attention to it

yes it's works
@if (this->item(LastRow,0) != 0)@

[advseo32]

now

i want to change the behavior of vertical header in Qtableview

this is what i mean:

when user start fill table cells, i want this sign(*) present in vertical header instead of numbers

when user moves beteween rows , i want also this sign(>) present in vertical header instead of numbers

what function i need to implement

[SGaist]

Did you read the documentation of the various classes you are using ? For example "cellChanged":http://qt-project.org/doc/qt-4.8/qtablewidget.html#cellChanged ?

[advseo32]

yes i did, but what functions are responsible for doing this

sign(*) present in vertical header instead of numbers

sign(>) present in vertical header instead of numbers

[JKSH]

[quote author="SGaist" date="1374952377"]Did you read the documentation of the various classes you are using ?
[quote author="advseo32" date="1374964095"]yes i did, but what functions are responsible for...[/quote][/quote]Please read more thoroughly.

Go to the "documentation":http://qt-project.org/doc/qt-5.1/qtwidgets/qtablewidget.html again and search for "header". Try different functions with good names to see what they do.

[advseo32]

i have try many functions but no result

Her is my try
this function called when the user start editing cell "CellChanged Signal"
@
void Dialog::newfunction()
{
QModelIndex index ;
index = tableau->model()->index(0,0) ;
tableau->verticalHeader()->model()->setData(index,QPixmap("imgs/arrow.png"),Qt::DecorationRole);
}

@

[JKSH]

Good on you for trying.
[quote author="advseo32" date="1375041952"]
Her is my try
this function called when the user start editing cell "CellChanged Signal"
@
void Dialog::newfunction()
{
QModelIndex index ;
index = tableau->model()->index(0,0) ;
tableau->verticalHeader()->model()->setData(index,QPixmap("imgs/arrow.png"),Qt::DecorationRole);
}

@
[/quote]There are two major issues:

If you haven't set any header data, tableau->verticalHeader()->model() returns NULL

You have 2 models here. tableau->model() is the table model, tableau->verticalHeader()->model() is the header model. You created an index for the table model, so you can't use that index to set data in the header model.

Hint: If you use setHeaderData(), you don't need an index