Databases
StackOverflow2013
Postsdbo
POMystery: In Qt, why would editorEvent be called, but not createEditor?
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POMystery: In Qt, why would editorEvent be called, but not createEditor?
    text
    copied!<p>I'm subclassing QAbstractItemDelegate. This is my code. Suggestions are welcome:</p> <pre><code>QWidget *ParmDelegate::createWidget(Parm *p, const QModelIndex &amp;index) const { QWidget *w; if (index.column() == 0) { w = new QLabel(p-&gt;getName().c_str()); } else { if (p-&gt;isSection()) return NULL; w = p-&gt;createControl(); } return w; } QWidget *ParmDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &amp;option, const QModelIndex &amp;index) const { cout &lt;&lt; "createEditor called" &lt;&lt; endl; Parm *p = reinterpret_cast&lt;Parm*&gt;(index.internalPointer()); QWidget *retval = createWidget(p, index); retval-&gt;setFocusPolicy(Qt::StrongFocus); retval-&gt;setParent(parent); return retval; } void ParmDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &amp;option, const QModelIndex &amp;index) const { QRect rect(option.rect); editor-&gt;setGeometry(QRect(QPoint(0,0), rect.size())); } void ParmDelegate::paint(QPainter *painter, const QStyleOptionViewItem &amp;option, const QModelIndex &amp;index) const { Parm *p = reinterpret_cast&lt;Parm*&gt;(index.internalPointer()); scoped_ptr&lt;QWidget&gt; w(createWidget(p, index)); if (!w) return; QRect rect(option.rect); w-&gt;setGeometry(QRect(QPoint(0,0), rect.size())); w-&gt;render(painter, rect.topLeft()); } QSize ParmDelegate::sizeHint(const QStyleOptionViewItem &amp;option, const QModelIndex &amp;index) const { Parm *p = reinterpret_cast&lt;Parm*&gt;(index.internalPointer()); scoped_ptr&lt;QWidget&gt; w(createWidget(p, index)); if (!w) return QSize(0,0); return w-&gt;sizeHint(); } bool ParmDelegate::editorEvent(QEvent * event, QAbstractItemModel * model, const QStyleOptionViewItem &amp; option, const QModelIndex &amp; index ) { cout &lt;&lt; "editorEvent called" &lt;&lt; endl; return false; } </code></pre> <p>When this is run, I only see that editorEvent gets called twice for every edit event -- no createEditor!</p>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload