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POHow do I using QWebPage as a delegate of QListView?
 

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  1. POHow do I using QWebPage as a delegate of QListView?
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    <p>I'm working on a client for a social network. It is written in Qt &amp; Python. I need to put the timeline into a <code>QListView</code> (think about Twitter or Facebook).</p> <p>But, QListView can not render rich text, so I use <code>QTextDocument</code> as a delegate. </p> <pre><code>class HTMLDelegate(QtGui.QStyledItemDelegate): def paint(self, painter, option, index): options = QtGui.QStyleOptionViewItemV4(option) self.initStyleOption(options, index) options.text = options.text.replace(" ", "&amp;nbsp;") style = QtGui.QApplication.style() if options.widget is None else options.widget.style() doc = QtGui.QTextDocument() doc.setHtml(options.text) doc.setTextWidth(option.rect.width()) options.text = "" style.drawControl(QtGui.QStyle.CE_ItemViewItem, options, painter) ctx = QtGui.QAbstractTextDocumentLayout.PaintContext() # Highlighting text if item is selected #if (optionV4.state &amp; QStyle::State_Selected) #ctx.palette.setColor(QPalette::Text, optionV4.palette.color(QPalette::Active, QPalette::HighlightedText)); textRect = style.subElementRect(QtGui.QStyle.SE_ItemViewItemText, options) painter.save() painter.translate(textRect.topLeft()) painter.setClipRect(textRect.translated(-textRect.topLeft())) doc.documentLayout().draw(painter, ctx) painter.restore() def sizeHint(self, option, index): options = QtGui.QStyleOptionViewItemV4(option) self.initStyleOption(options, index) doc = QtGui.QTextDocument() doc.setHtml(options.text) doc.setTextWidth(options.rect.width()) return QtCore.QSize(doc.idealWidth(), (doc.size().height())) </code></pre> <p>It is works, but it doesn't support all HTML labels.</p> <p>After a lot of search, I found <code>QWebView</code>, it is a fully-functional HTML viewer. I want to use <code>QWebPage</code> as a delegate for <code>QListView</code>.</p> <p>So, I tried:</p> <pre><code>class HTMLDelegate(QtGui.QStyledItemDelegate): def paint(self, painter, option, index): options = QtGui.QStyleOptionViewItemV4(option) self.initStyleOption(options, index) options.text = options.text.replace(" ", "&amp;nbsp;") style = QtGui.QApplication.style() if options.widget is None else options.widget.style() webPage = QtWebKit.QWebPage(self) webFrame = webPage.mainFrame() webPage.setViewportSize(webPage.mainFrame().contentsSize()) webFrame.setHtml(options.text) #doc.setTextWidth(option.rect.width()) options.text = "" style.drawControl(QtGui.QStyle.CE_ItemViewItem, options, painter) #ctx = QtGui.QAbstractTextDocumentLayout.PaintContext() textRect = style.subElementRect(QtGui.QStyle.SE_ItemViewItemText, options) painter.save() painter.translate(textRect.topLeft()) painter.setClipRect(textRect.translated(-textRect.topLeft())) webFrame.render(painter) painter.restore() </code></pre> <p>But it doesn't work. It just shows blank items.</p> <p>What wrong did I do?</p> <p>Or, is there another solution for that situation? I found <code>setItemWidget()</code> can put many widget into a item of <code>QListView</code>, but it will break Model-View.</p>
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    1. COWhat I notice is that you call `webPage.setViewportSize` before `webFrame.setHtml`, which certainly seems like the wrong way round. Do you not in any case want the viewport size to be the area that you're going to be painting into?
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      1. POHow do I using QWebPage as a delegate of QListView?
      1. USDan Milburn
    2. COHow do I set a correct viewpoint size?
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      1. POHow do I using QWebPage as a delegate of QListView?
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    3. COThanks, I swap them, then I can see the contents. But I don't how to write `sizeHint`, how do I get width or height from `QWebPage`?
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      1. POHow do I using QWebPage as a delegate of QListView?
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