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  4. [SOLVED] Insert row from Qtableview to another
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[SOLVED] Insert row from Qtableview to another

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  • A Offline
    A Offline
    advseo32
    wrote on last edited by
    #15

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

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #16

      Then change 1 by tableNouveau->rowCount()

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      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • A Offline
        A Offline
        advseo32
        wrote on last edited by
        #17

        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

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        • A Offline
          A Offline
          advseo32
          wrote on last edited by
          #18

          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());
          }

          @

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #19

            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 ?

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • A Offline
              A Offline
              advseo32
              wrote on last edited by
              #20

              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

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              • A Offline
                A Offline
                advseo32
                wrote on last edited by
                #21

                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 "

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #22

                  It is explained in the function documentation

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                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • A Offline
                    A Offline
                    advseo32
                    wrote on last edited by
                    #23

                    i still can't know what i do ,

                    subclass Qtablewidget and implement keypressevent
                    or use shortcuts .

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #24

                      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

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • A Offline
                        A Offline
                        advseo32
                        wrote on last edited by
                        #25

                        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;
                        }
                        

                        }
                        @

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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #26

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

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          • A Offline
                            A Offline
                            advseo32
                            wrote on last edited by
                            #27

                            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

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                            • A Offline
                              A Offline
                              advseo32
                              wrote on last edited by
                              #28

                              [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

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                              • A Offline
                                A Offline
                                advseo32
                                wrote on last edited by
                                #29

                                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;
                                }
                                

                                @

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                                • A Offline
                                  A Offline
                                  advseo32
                                  wrote on last edited by
                                  #30

                                  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 ??

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                                  • JKSHJ Offline
                                    JKSHJ Offline
                                    JKSH
                                    Moderators
                                    wrote on last edited by
                                    #31

                                    [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.

                                    Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

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                                    • A Offline
                                      A Offline
                                      advseo32
                                      wrote on last edited by
                                      #32

                                      [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

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                                      • JKSHJ Offline
                                        JKSHJ Offline
                                        JKSH
                                        Moderators
                                        wrote on last edited by
                                        #33

                                        [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 :)

                                        Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

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                                        • A Offline
                                          A Offline
                                          advseo32
                                          wrote on last edited by
                                          #34

                                          [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)@

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