[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