Takin control of QTableView Scrollbars

[tuli]

Hello,


I have a QTableView widget with only one row, that is "scrolled" by a custom scrollbar of mine. This works fine when i have widget that contains both the tableview and the scrollbar, as in:

QWidget* wid = new QWidget();
			QLayout* l = new  QHBoxLayout();
			l->addWidget(tableview);
			l->addWidget(scrollbar);
			wid->setLayout(l);

QWidget* wid = new QWidget();
			QLayout* l = new  QHBoxLayout();
			l->addWidget(tableview);
			l->addWidget(scrollbar);
			wid->setLayout(l);

To copy to clipboard, switch view to plain text mode 

Since QTableView inherits QAbstractScrollArea, i though i could make my scrollbar part of the QTableView item. Not so. When i call setScrollBar(scrollbar) it only shows an empty scrollbar. I am guessing this is because the scrollbar is associated with the scroll logic of the tableview.


Any way to disassociate it with the tableview/abstractscrollarea scrolling logic and make it behave as totally independent component?

[ChrisW67]

This works for me:

#include <QApplication>
#include <QTableView>
#include <QStandardItemModel>
#include <QScrollBar>
 
class WideScrollBar: public QScrollBar
{
public:
    WideScrollBar(QWidget *p = 0): QScrollBar(p)
    {
        setStyleSheet( "QScrollBar:vertical { width: 25px; } ");
    }
};
 
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QStandardItemModel model(50, 3);
    for (int i = 0; i < model.rowCount(); ++i) {
        for (int j = 0; j < model.columnCount(); ++j) {
            QStandardItem *item = new QStandardItem(QString("%1, %2").arg(i).arg(j));
            model.setItem(i, j, item);
        }
    }
 
    QTableView view;
    view.setModel(&model);
    view.setVerticalScrollBar(new WideScrollBar(&view));
    view.show();
 
    return app.exec();
}

#include <QApplication>
#include <QTableView>
#include <QStandardItemModel>
#include <QScrollBar>

class WideScrollBar: public QScrollBar
{
public:
    WideScrollBar(QWidget *p = 0): QScrollBar(p)
    {
        setStyleSheet( "QScrollBar:vertical { width: 25px; } ");
    }
};


int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QStandardItemModel model(50, 3);
    for (int i = 0; i < model.rowCount(); ++i) {
        for (int j = 0; j < model.columnCount(); ++j) {
            QStandardItem *item = new QStandardItem(QString("%1, %2").arg(i).arg(j));
            model.setItem(i, j, item);
        }
    }

    QTableView view;
    view.setModel(&model);
    view.setVerticalScrollBar(new WideScrollBar(&view));
    view.show();

    return app.exec();
}

To copy to clipboard, switch view to plain text mode 

and produces a customised scroll bar that works as expected. If the table had only one row I would not expect to see a vertical scroll bar at all.

[anda_skoa]

Any way to disassociate it with the tableview/abstractscrollarea scrolling logic and make it behave as totally independent component?

Isn't that what you already have?

Why associate it just to disassociate it again?

Cheers,
_