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c++qtqt4qt4.8

How to get the row number of widget placed in a cell of Qtablewidget when it get clicked?

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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

Solution

  • 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