Implement custom tree/table header view to support filtering on columns

Hi all,
I want custom header view for my tree/table view like in the attachment, I want to show a line edit below the each column header so that use can filter on each column by entering text into the line edit.
I tried with delegate & came to know that delegate can't work with QHeaderView, so tried other ways also they really didn't work.

what is the best way to achieve this, If I need to customize the QHeaderView, what are the functions I need to re-implement ?

Attachment 11808


Thanks in the advance.

hide existing view header.
Have a custom header, It is nothing but QTableView with 1 row & no.of columns your original view has. for this table view set Lined edits as cell widgets so that we will have line edits below headers where we can type & use as filter.
We need to connect few sig/slots in order to sync b/w this header & our main view.

Code:

---

class CustomHeader : public QHeaderView
{
    Q_OBJECT
public:
   CustomHeader(int columnCount = 0, QWidget *parent = 0)
   {
            QHBoxLayout *l = new QHBoxLayout(this);
            l->setContentsMargins(0,0,0,0);
            l->setSpacing(0);
 
            table = new QTableWidget(1, columnCount, this);
            l->addWidget(table);
            table->setFixedHeight(55);
 
            for(int i=0; i<columnCount; i++)
           {
                    DelayedLineEdit* lineEdit = new DelayedLineEdit(this);
                    lineEdit->setDelay(700);
                    lineEdit->setIndex(i);
                    table->setCellWidget(0, i, lineEdit);
                    connect(lineEdit, SIGNAL(delayTextChanged(QString)), this, SLOT(applyColumnFilter(QString)));
           }
 
           table->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
           table->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
           table->verticalHeader()->hide();
 
           setLayout(l);
           setFixedHeight(50);
     }
 
private:
    QTableWidget* table;
};
 
 
 
class treeView : public QTreeView
{
    Q_OBJECT
public:
    treeView(QWidget *parent = 0)
   {  
         // Horizontal header treatement:
         header()->hide();
         m_header = new CustomHeader(m_treeModel->columnCount(), this);
    }
    ~treeView();
 
protected:
    void resizeEvent(QResizeEvent *event) {
        setViewportMargins(0,60, 0, 0);
        m_header->setGeometry(0, 0, viewport()->width(), m_header->sizeHint().height());
    }
    void showEvent(QShowEvent *) {
        setViewportMargins(0, m_header->sizeHint().height(), 0, 0);
        m_header->setGeometry(0, 0, viewport()->width(), m_header->sizeHint().height());
    }
 
private:
    CustomHeader *m_header;
};

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