3

I subclassed QTableView, QAbstractTableModel, and QItemDelegate. I am able to hover a single cell on mouse over:

void SchedulerDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    ...

    if(option.showDecorationSelected &&(option.state & QStyle::State_Selected))
{
    QColor color(255,255,130,100);
    QColor colorEnd(255,255,50,150);
    QLinearGradient gradient(option.rect.topLeft(),option.rect.bottomRight());
    gradient.setColorAt(0,color);
    gradient.setColorAt(1,colorEnd);
    QBrush brush(gradient);
    painter->fillRect(option.rect,brush);
}

    ...
}

... but I cannot figure out, how to hover an entire row. Can Someone help me with sample codes?

AB Bolim
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user1728778
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  • I'm trying to find a way to tell Qt to highlight the entire row on mouse hover, no luck.. – 0xbaadf00d Dec 13 '13 at 11:55
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    Possible duplicate of [QTableView How can I highlight the entire row for mouse hover?](https://stackoverflow.com/questions/20565930/qtableview-how-can-i-highlight-the-entire-row-for-mouse-hover) – Serafim Costa Feb 05 '18 at 15:47

2 Answers2

1

There are 2 ways..

1) You can use delegates to draw the row background...
You will need to set the row to highlight in the delegate and based on that, do the highlighting.

2) Catch the signal of current row. Iterate over the items in that row and set background for each item.

you can also tried style sheet:

QTableView::item:hover {
    background-color: #D3F1FC;
}

Hope, It will usefull to you guys.

AB Bolim
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1

Here is my implementation,it works well.First you should subclass QTableView/QTabWidget ,emit a signal to QStyledItemDelegate in mouseMoveEvent/dragMoveEvent function .This signal will send the hovering index.

In QStyledItemDelegate ,use a member variable hover_row_(changed in a slot bind to above signal) to tell paint function which row is be hovered.

Here is the code examaple:

//1: Tableview :
void TableView::mouseMoveEvent(QMouseEvent *event)
{
    QModelIndex index = indexAt(event->pos());
    emit hoverIndexChanged(index);
    ...
}
//2.connect signal and slot
    connect(this,SIGNAL(hoverIndexChanged(const QModelIndex&)),delegate_,SLOT(onHoverIndexChanged(const QModelIndex&)));

//3.onHoverIndexChanged
void TableViewDelegate::onHoverIndexChanged(const QModelIndex& index)
{
    hoverrow_ = index.row();
}

//4.in Delegate paint():
void TableViewDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
...
    if(index.row() == hoverrow_)
    {
        //HERE IS HOVER COLOR
        painter->fillRect(option.rect, kHoverItemBackgroundcColor);
    }
    else
    {
        painter->fillRect(option.rect, kItemBackgroundColor);
    }
...
}
baixiangcpp
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