QListWidget::setItemWidget The Selection area behind the label image

[joeQ]

1. i use the QListWidget to preview some images files. I did not use the setIcon. I did inherit QWidget, QWidget include two QLabel to load imags and to show some text.
2. i use the following code to add the item;

    pItemWidget = new ListItemWidget(this); // My Widget
    pItemWidget->SetPixmap( pixmap ); // My customize function: Qlabel load pixmap
    pItemWidget->SetImgPath( qsFilePath );// My customize function: show some text

    pItem = new QListWidgetItem(this);
    pItem->setSizeHint( pItemWidget->size() );
    pItem->setFlags( Qt::ItemIsEnabled |
                     Qt::ItemIsSelectable | Qt::ItemIsDragEnabled);

    setItemWidget(pItem, pItemWidget);

2. when i use the mouse to choose the list widget item, i find the selection area behind the label image. i do not know how to do ? help me...

3. My Problem image

4. My Code. My Zip code, You can click and download My code Demo

[p3c0]

@joeQ Try setSelectionRectVisible(false)

[joeQ]

@p3c0 i want to have the selection area. but the selection area behind the label image. i want the selection area before the label image. Thank u.

[p3c0]

@joeQ The selection rect is already at foreground. There might be some other problem in your code.
Here a simple test I did:

for(int i=0; i<10; i++) {
    QListWidgetItem *item = new QListWidgetItem;
    item->setText("Item");
    item->setIcon(QIcon("image.png"));
    ui->listWidget->insertItem(row, item);
}

[joeQ]

@p3c0 Yes, i used the other way is ok. but, i used the setItemWidget to QListWidget, it is wrong. i don't know why. you can download my demo. step 4. Please help me. Thank u.

[p3c0]

@joeQ Unfortunately I too am not aware of this kind of behaviour. I have reduced the problem to the following for anyone else to test:

    listWidget->setViewMode(QListView::IconMode);
    listWidget->setSelectionMode(QAbstractItemView::ExtendedSelection);

    for(int i=0; i<10; i++) {
        QPushButton *label = new QPushButton;
        label->resize(50,50);
        label->setText("Button"+QString::number(i));

        QListWidgetItem *item = new QListWidgetItem;
        item->setSizeHint(label->size());
        listWidget->insertItem(i, item);

        listWidget->setItemWidget(item, label);
    }

For eg. following works:

Use QLabel instead and set only the text. But if we set pixmap for label then its the same behavior.
Is there any other setting ? Or only subclassing might solve this problem ?

[joeQ]

@p3c0 Thank u very much, I do not give it up. when i solved it , i will share my way for u.

[SGaist]

Hi,

It's because you are setting a widget on a cell, the widget is "above" the cell.

If you only want to show an image then you should use a custom QStyledItemDelegate.

[joeQ]

@SGaist Hi, Thank u. and if I don't want to use a custom QStyledItemDelegate. What should I do ?

My Widget has image label and text label, The important thing is that some of my structure data is stored in the Widget class members, eg: structure pointer.

I also used try setItemData function, but Data type mismatch. so, i subclass the QWidget.

[SGaist]

From the setItemWidget documentation: it's to display static content. It's not meant to handle D&D or editing.

Why do you need to embed custom data in that widget ?

[joeQ]

@SGaist I think i was wrong, i chosed the wrong solution. Thank u, and , i found some demo about delegate, i know , i should to use the QStyledItemDelegate class. Thank u very much. and i am new bird in Qt. so ...