A progress bar into treeView or something like that.

[nilhcraiv]

Hello,

I want to show in QTreeView a lot of QProgressBars as child of each item to indicate a processes, i.e. each item show a text in treeView, and they have QProgressBars as childs. I try it with QItemDelegate, but don't know how I individualy update each QProgressBar. I do it as follows: (I found this code searching on Internet)

CustomItemDelegate::CustomItemDelegate(QObject *parent) :
    QItemDelegate(parent)
{
    _state =  QStyle::State_Enabled;
}
 
void CustomItemDelegate::paint(QPainter *painter,
                   const QStyleOptionViewItem &option,
                   const QModelIndex &index) const
{
    if(index.parent().isValid())
    {
        QStyleOptionProgressBarV2 progressBarOption;
        QRect rect = option.rect;
        QSize size(rect.width()*3/4,rect.height()*3/4);
        rect.setSize(size);
        progressBarOption.state = QStyle::State_Enabled;
        progressBarOption.direction = QApplication::layoutDirection();
        progressBarOption.rect =rect;
        progressBarOption.fontMetrics = QApplication::fontMetrics();
        QPalette pal = progressBarOption.palette;
        QColor col;
        col.setNamedColor("#05B8CC");
        pal.setColor(QPalette::Highlight,col);
        progressBarOption.palette = pal;
        progressBarOption.type = QStyleOption::SO_ProgressBar;
        progressBarOption.version = 2 ;
        progressBarOption.minimum = 0;
        progressBarOption.maximum = 100;
        progressBarOption.textAlignment = Qt::AlignCenter;
        progressBarOption.textVisible = true;
        int progress = index.data(Qt::DisplayRole).toInt();//TCP client or server must changes this value emitting signal bytesWritten(qint64)
        progressBarOption.progress = progress;
        progressBarOption.text = QString("%1%").arg(progressBarOption.progress);
 
        // Draw the progress bar onto the view.
        QApplication::style()->drawControl(QStyle::CE_ProgressBar, &progressBarOption, painter,0);
 
    }
    else
    {
        QItemDelegate::paint(painter, option, index);
    }
}
 
...
...

CustomItemDelegate::CustomItemDelegate(QObject *parent) :
    QItemDelegate(parent)
{
    _state =  QStyle::State_Enabled;
}

void CustomItemDelegate::paint(QPainter *painter,
                   const QStyleOptionViewItem &option,
                   const QModelIndex &index) const
{
    if(index.parent().isValid())
    {
        QStyleOptionProgressBarV2 progressBarOption;
        QRect rect = option.rect;
        QSize size(rect.width()*3/4,rect.height()*3/4);
        rect.setSize(size);
        progressBarOption.state = QStyle::State_Enabled;
        progressBarOption.direction = QApplication::layoutDirection();
        progressBarOption.rect =rect;
        progressBarOption.fontMetrics = QApplication::fontMetrics();
        QPalette pal = progressBarOption.palette;
        QColor col;
        col.setNamedColor("#05B8CC");
        pal.setColor(QPalette::Highlight,col);
        progressBarOption.palette = pal;
        progressBarOption.type = QStyleOption::SO_ProgressBar;
        progressBarOption.version = 2 ;
        progressBarOption.minimum = 0;
        progressBarOption.maximum = 100;
        progressBarOption.textAlignment = Qt::AlignCenter;
        progressBarOption.textVisible = true;
        int progress = index.data(Qt::DisplayRole).toInt();//TCP client or server must changes this value emitting signal bytesWritten(qint64)
        progressBarOption.progress = progress;
        progressBarOption.text = QString("%1%").arg(progressBarOption.progress);

        // Draw the progress bar onto the view.
        QApplication::style()->drawControl(QStyle::CE_ProgressBar, &progressBarOption, painter,0);

    }
    else
    {
        QItemDelegate::paint(painter, option, index);
    }
}

...
...

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and in QTreeView

CustomItemDelegate* itemDelegate = new CustomItemDelegate(this);
    setItemDelegate( itemDelegate );//To set progressbar in childs of each item.
 
    setModel( "a QAbstractItemModel to build the hierarchy of item");

CustomItemDelegate* itemDelegate = new CustomItemDelegate(this);
    setItemDelegate( itemDelegate );//To set progressbar in childs of each item.

    setModel( "a QAbstractItemModel to build the hierarchy of item");

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In this code the progress of QProgressBar is set by text on QModelIndex index. How I can change only a progress in one ProgressBar? My application creates a TCP connection to send a file and I wish show the progress in each progressbar but I don't want update all QAbstractItemModel by setModel()

I have searched a lot, but have not found the solution!