Best method for attaching QWidget into a Qtable()

SimonBenAnderson

Hi everyone,

This is my first time posting here. I have been coding in Qt for a few years now, but have only recently gone a bit deeper into the Model/View/Customising Widgets.

Im currently stuck on a problem, and was wondering if anyone could help. I have looked around but have been unable to find something that helps with regards to this problem.

I have a QAbstractTable that gets populates about 100+ entries, To edit this table I have a QStylisedItemDelegate, that on specific cells creates a drop down with a list of users from the DB. All of this works great, I have color cells depending on which department, or heading is in a specific cell.

Now here comes the curve ball.

In 5 of my columns I want to populate the cell with a widget that I have writen, only when in view mode, not in edit mode, as I still want my drop-downs when editing. The widget is nothing to advanced, It draws a block for every stage under the column and gives the status of a stage a color. If the user moves over the color the tooltip gives more information about the stage.

!https://dl.dropboxusercontent.com/u/10740198/QtQuestion.jpg(The Table and the Widget)!

Is there a way to populate the cells with my widget, should I instead of creating instances of the my custom widget, use the Delegate.paint() function and recreate the widget inside my delegate(to me this seems a bit messy, but if it has to be done it shall) or should I look into creating a custom view. Im still new to views as so all suggestions are welcome :)

Thank for the help everyone

dheerendra

You need to implement the paint() method of delegate when you are in read only mode to display your customwidget.

SimonBenAnderson

How does one display the widget in paint(), as paint I have found only allows you to paint something new, not create a widget and input it into a cell.

Am I missing something, or a special way of creating a widget, pulling out its paint and putting it into my delegates paint?

dheerendra

Yes, It is painting something new. Not for the putting your existing widget. You can copy-paste the widget code as you said.

SimonBenAnderson

Thanks Dheerendra, I was wondering if by any chance you have a simplecode snippet of something like this as im still struggling to find the correct method of doing this.

dheerendra

Here is snippet.

have following enums defined for 5 columns.
@
enum Column {Name, Father,Family,Adhar_No,State};
@

So paint is called for Adhar_no column

Tableview settings :
@
ui->tableView->setItemDelegateForColumn(Adhar_No,myDeligate);
ui->tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);
@
Delegate Paint implementation.
@
void QMyDeligate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const{
qDebug() << "****I am here *****"<<endl;
painter->save();
if (index.column() == Adhar_No){
qDebug() << "Create Hell" << endl;
if (option.state & QStyle::State_Selected)
painter->fillRect(option.rect, option.palette.highlight());
else if (option.state & QStyle::State_MouseOver)
painter->fillRect(option.rect, option.palette.midlight());
QFontMetrics fm(option.font);

    QRect outline = option.rect;
    int outmid = outline.center().y();

    QRect fnBound = fm.boundingRect("filename");
    int fnBoundMid = fnBound.center().y();
    fnBound.moveLeft(outline.left());
    fnBound.translate(0, outmid - fnBoundMid);
    painter->drawEllipse(fnBound);
    //painter->drawText(fnBound, Qt::AlignVCenter | Qt::AlignLeft, "filename");
}
painter->restore();

}
@

SimonBenAnderson

do you know of a way to only paint every cell on startup and then only selected cells after startup. as currently all 500cells are getting repainted ever time I select anything, and it has created a massive slow down.

SimonBenAnderson

Thanks, I finally figured it all out and its working :D hooraa!