QDataWidgetMapper/QInputDialog oddities...

[scott_hollen]

I super appreciate if anyone can explain something I'm seeing with a combo box and my widget mapper when I call QInputDialog...

I have a QSqlTableModel with values from a row in the database mapped to a combo box. I have a second QsqlTableModel with values mapped to a combo box as well, and it's values are determined by using the first combo box selection as a filter. Image the first CB being a list of baseball teams and clicking on a team causes that team's players to populate this second one; choose a different team in the first and the 2nd changes accordingly.

This works perfectly until the user decides to add a new value to the 2nd combo box by clicking a "New" pushbutton -- I have a clicked() signal calling a slot which calls QInputDialog to prompt for a value...Suddenly, the value in my first combo box resets to the value found at current_index(0) as soon as the dialog is displayed! Just for fun, I checked the index of the first combo box and it's correct before the dialog is displayed, but reset afterwards...I can't find what I'm doing wrong so I don't know what I'm doing wrong...

I commented out the QInputDialog call and just hard coded a value and everything worked fine...

Any ideas? Thanks!


scott



This is the constructor for the first model/combo box

//*****************
   //*  Rig Data...  *
   //*****************
   rigmodel = new QSqlTableModel(this);
   rigmodel->setTable ("rig");
   rigmodel->sort (1, Qt::AscendingOrder);
   rigmodel->setEditStrategy (QSqlTableModel::OnFieldChange);
 
   rigmodel->select ();
 
   record = rigmodel->record (0);
   rig_id =  record.value ("rig_id").toInt ();
 
   rignamemapper = new QDataWidgetMapper(this);
   rignamemapper->setModel (rigmodel);
   rignamemapper->setSubmitPolicy(QDataWidgetMapper::AutoSubmit);
   rignamemapper->toFirst ();
   rignamemapper->addMapping (ui->RigInvNameCB, 1);
 
   ui->RigInvNameCB->setModel (rigmodel);
   ui->RigInvNameCB->setModelColumn (1);
   ui->RigInvNameCB->setCurrentIndex (0);

//*****************
   //*  Rig Data...  *
   //*****************
   rigmodel = new QSqlTableModel(this);
   rigmodel->setTable ("rig");
   rigmodel->sort (1, Qt::AscendingOrder);
   rigmodel->setEditStrategy (QSqlTableModel::OnFieldChange);

   rigmodel->select ();

   record = rigmodel->record (0);
   rig_id =  record.value ("rig_id").toInt ();

   rignamemapper = new QDataWidgetMapper(this);
   rignamemapper->setModel (rigmodel);
   rignamemapper->setSubmitPolicy(QDataWidgetMapper::AutoSubmit);
   rignamemapper->toFirst ();
   rignamemapper->addMapping (ui->RigInvNameCB, 1);

   ui->RigInvNameCB->setModel (rigmodel);
   ui->RigInvNameCB->setModelColumn (1);
   ui->RigInvNameCB->setCurrentIndex (0);

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This is for the second model/combo box

//***************************
   //*  Rig Inventory Data...  *
   //***************************
   riginvmodel = new QSqlTableModel(this);
   riginvmodel->setTable ("riginv");
   riginvmodel->sort (32, Qt::AscendingOrder);
   riginvmodel->setEditStrategy (QSqlTableModel::OnFieldChange);
   riginvmodel->setFilter (QString("riginv_rig_id = %1").arg(rig_id));
   riginvmodel->select ();
 
   riginvmapper = new QDataWidgetMapper(this);
   riginvmapper->setModel (riginvmodel);
   riginvmapper->setSubmitPolicy(QDataWidgetMapper::AutoSubmit);
   riginvmapper->toFirst ();
   riginvmapper->addMapping (ui->EquipIDCB, 32);
 
   ui->EquipIDCB->setModel (riginvmodel);
   ui->EquipIDCB->setModelColumn (32);
   ui->EquipIDCB->setCurrentIndex (0);

//***************************
   //*  Rig Inventory Data...  *
   //***************************
   riginvmodel = new QSqlTableModel(this);
   riginvmodel->setTable ("riginv");
   riginvmodel->sort (32, Qt::AscendingOrder);
   riginvmodel->setEditStrategy (QSqlTableModel::OnFieldChange);
   riginvmodel->setFilter (QString("riginv_rig_id = %1").arg(rig_id));
   riginvmodel->select ();

   riginvmapper = new QDataWidgetMapper(this);
   riginvmapper->setModel (riginvmodel);
   riginvmapper->setSubmitPolicy(QDataWidgetMapper::AutoSubmit);
   riginvmapper->toFirst ();
   riginvmapper->addMapping (ui->EquipIDCB, 32);

   ui->EquipIDCB->setModel (riginvmodel);
   ui->EquipIDCB->setModelColumn (32);
   ui->EquipIDCB->setCurrentIndex (0);

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The slot where I'm having problems

void MainWindow::on_NewEquipIDPB_clicked()
{
   int row;
   bool ok;
   int current_rig_id;
 
   QString newequipname;
 
   QSqlRecord record;
 
   qDebug() << "combo index " << ui->RigInvNameCB->currentIndex ();
   qDebug() << "mapper index " << rignamemapper->currentIndex ();
 
   //**************************************************
   //*  Go get a name for this piece of equipment...  *
   //**************************************************
   newequipname = QInputDialog::getText (this, tr("New Equipment Name"),
                           tr("Enter a Name for this piece of Equipment"),
                           QLineEdit::Normal, QString(), &ok);
 
   qDebug() << "combo index " << ui->RigInvNameCB->currentIndex ();
   qDebug() << "mapper index " << rignamemapper->currentIndex ();
 
   if (ok && !newequipname.isEmpty ())
.
.
.

void MainWindow::on_NewEquipIDPB_clicked()
{
   int row;
   bool ok;
   int current_rig_id;

   QString newequipname;

   QSqlRecord record;

   qDebug() << "combo index " << ui->RigInvNameCB->currentIndex ();
   qDebug() << "mapper index " << rignamemapper->currentIndex ();

   //**************************************************
   //*  Go get a name for this piece of equipment...  *
   //**************************************************
   newequipname = QInputDialog::getText (this, tr("New Equipment Name"),
                           tr("Enter a Name for this piece of Equipment"),
                           QLineEdit::Normal, QString(), &ok);
   
   qDebug() << "combo index " << ui->RigInvNameCB->currentIndex ();
   qDebug() << "mapper index " << rignamemapper->currentIndex ();

   if (ok && !newequipname.isEmpty ())
.
.
.

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Results of the qDebug() calls:

combo index  2 
mapper index  2 
 
combo index  0 
mapper index  -1

combo index  2 
mapper index  2 

combo index  0 
mapper index  -1

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[scott_hollen]

And it gets stranger:

1) This issue also happens when my "delete" and "copy" slots are fired as well as clicking in a line edit on my form...
2) This problem only happens once! When it does if I re-select from my first CB it never happens again; I can reselect any value from my first CB and then when I click any other widget it works perfect.
3) I have a slot connected to the first CB this is *not* fired when I'm seeing the value reset itself -- I thought that may be happening but it's not, so somewhere an index is being reset/mapper is losing connection to the CB when another widget is clicked, but again, only once...


scott