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POBlinking background cell in a model
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  1. POBlinking background cell in a model
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    copied!<p>I am confused about the <code>setData</code> in data methods for my custom role (<code>IsBlinkingRole</code>). I've tried different options but every option failed.</p> <pre><code>bool CustomSqlModel::setData( const QModelIndex&amp; index, const QVariant&amp; value, int role) { if (role == IsBlinkingRole &amp;&amp; index.column() == 0 &amp;&amp; index.isValid()) { //What to put here ? emit dataChanged(index, index); return true; } return false; QVariant CustomSqlModel::data(const QModelIndex&amp; index, int role) const { QVariant value = QSqlTableModel::data(index, role); if (role == Qt::BackgroundRole &amp;&amp; index.column() == 0) { QModelIndex testIndex = index.model()-&gt;index(index.row(), 0, index.parent()); if ( index.model()-&gt;data(testIndex, Qt::DisplayRole).toInt() == 5) return QVariant(QColor(Qt::red)); else return QVariant(); } return value; </code></pre> <p>}</p> <pre><code> void CustomSqlModel::timerEvent(QTimerEvent *) { static bool blinkon = true; blinkon = !blinkon; int topRow = rowCount(); int bottomRow = -1; for(int i = 0; i &lt; rowCount(); i++) { for(int j = 0; j &lt; columnCount(); j++) { if(data(index(i, j), IsBlinkingRole).toBool()){ if(blinkon) setData(index(i, j), Qt::red, Qt::BackgroundRole); else setData(index(i, j), QVariant(), Qt::BackgroundRole); if(i &lt; topRow) topRow = i; if(i &gt; bottomRow) bottomRow = i; } } } if(bottomRow &gt;= 0) emit dataChanged(index(topRow, 0), index(bottomRow, columnCount()-1)); </code></pre> <p>}</p> <p>The problem I have with the <code>setData</code> method is regarding what kind of code I need to put here. </p> <p>Do I have to create a container first to store data? </p> <p><sub>Sidenote: Thanks cjhuitt for your time and advice.<br> If I can't solve this then I will leave the blinking cell.<br> My apologies for asking three times the same question.<br> I am new to stackoverflow.</sub> </p>
 

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