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PORender QWidget in paint() method of QWidgetDelegate for a QListView
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Id
6452838
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AcceptedAnswerId
6548426
AnswerCount
3
ClosedDate
CommentCount
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CommunityOwnedDate
CreationDate
2011-06-23T10:50:13.597
FavoriteCount
4
LastActivityDate
2018-04-27T11:25:51.247
LastEditDate
2018-04-27T11:25:51.247
LastEditorUserId
8815948
OwnerUserId
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PostTypeId
1
Score
9
ViewCount
10082
LastEditorDisplayName
text
Body
i'm having difficulties implementing custom widget rendering in a <code>QListView</code>. I currently have a <code>QListView</code> displaying my custom model called <code>PlayQueue</code> based on <code>QAbstractListModel</code>. This is working fine with simple text, but now I would like to display a custom widget for each element. So I subclassed a <code>QStyledItemDelegate</code> to implement the <code>paint</code> method like this: <pre><code>void QueueableDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const { if (option.state & QStyle::State_Selected) painter->fillRect(option.rect, option.palette.highlight()); QWidget *widget = new QPushButton("bonjour"); widget->render(painter); } </code></pre> The selection background is properly rendered but no widget is displayed. I tried with simple <code>QPainter</code> commands like in Qt examples, and this is working fine: <pre><code>void QueueableDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const { if (option.state & QStyle::State_Selected) painter->fillRect(option.rect, option.palette.highlight()); if (option.state & QStyle::State_Selected) painter->setPen(option.palette.highlightedText().color()); painter->setFont(QFont("Arial", 10)); painter->drawText(option.rect, Qt::AlignCenter, "Custom drawing"); } </code></pre> So I tried some changes like: <ul> <li>Changing <code>QStyledItemDelegate</code> to <code>QItemDelegate</code></li> <li>Adding <code>painter->save()</code> and <code>painter->restore()</code> around rendering</li> <li>Setting the widget geometry to the available size</li> </ul> But i'm a bit stuck now, i searched for a while on the internet, but can't find any example doing what i want, they all talk about editing widget (which is a lot easier) or custom drawn control (predefined ones, like progress bars). But here I really need a custom widget I created, containing some layout, labels & pixmaps. Thanks for your help! I'm using Qt 4.7.3 for GCC on Ubuntu 11.04.
Tags
<qt><qwidget><qpainter><qlistview><qstyleditemdelegate>
Title
Render QWidget in paint() method of QWidgetDelegate for a QListView
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1. USAdrien Jarthon
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