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What i'm trying is to get the row number of QcomboBox when user selects items. Although its easy to to get the cell column and row using 

cellClicked(int,int)

signal, but it only works when there is no widget on the cell.

so how to get the row number in case if there is a widget placed in a cell.

Note: All the combobox are added dynamically

secretgenes
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1 Answers1

3

At-last i found 2 ways of doing it.

  1. By setting the property of QComboBox
  2. Using the QSignalMapper

First Method 

QComboBox* mCombo = new QCombobox();
mComboBox->setProperty("row",(int) i); // i represents the row number in qtablewidget

In handler function where you are handling the clicked QComboBox

int row = sender()->property("row").toInt();

Second Method

QSignalMapper *signalMapper= new QSignalMapper(this);   //Create a signal mapper instance 

for (each row in table) {
     QComboBox* mCombo = new QComboBox();
     table->setCellWidget(row,col,combo);                          
     connect(mCombo, SIGNAL(currentIndexChanged(int)), signalMapper, SLOT(map()));  

/*connect each signal of QComboBox to signal Mapper slot (i.e map()) which in turns connected to the signal of signalMapper calling the SLOT associated with it (i.e rowFinder) */         

signalMapper->setMapping(combo, (int)row);  //assign mapping to each widgetusing set mapping


}

connect(signalMapper, SIGNAL(mapped(int)),
         this, SLOT(rowFinder(int)));

function : rowFinder(int rowIndex)

int row = rowIndex; //here is the row indexof selected QComboBox
secretgenes
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  • The correct way is to use a QStyledItemDelegate subclass that paints the combobox and creates it as editor. once that is implemented you can use the signals from `table->selectionModel()` (`selectionChanged` and `currentChanged`) to intercept whatever you want (but, again, I'm 99.9999% certain what you are trying to do is already doable inside the delegate) – IlBeldus Jul 19 '17 at 09:45