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POInitialising data into custom model from QAbstractTableModel in Qt?
 

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  1. POInitialising data into custom model from QAbstractTableModel in Qt?
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    <p>I am a beginner in Qt's Model/View Framework. I am having trouble using a QAbstractTableModel subclass (MyModel) with a QTableView. After creating MyModel object I want to set it to have 2 rows &amp; 2 columns. I have a initialise function which sets all the class variables &amp; then emits the dataChanged() SIGNAL but still the View is not showing anything.</p> <pre><code>class MyModel : QAbstractTableModel { public: MyModel(); Initialise(double **a, int r, int c); private: int row; int column; double **array; } MyModel::Initialise(double **a, int r, int c) { array = a; row = r; column = c; emit dataChanged(index(0, 0), index(r - 1, c - 1)); } </code></pre> <p>I have re-implemented all the required functions for read only access. But still I am getting a blank window. Created the above code in Notepad for illustration purpose, so please ignore syntax errors. I could not find any example in Qt SDK for creating custom model from QAbstractTableModel. So please let me know what is the correct method of initialising data into a model.</p> <p><strong>EDIT:</strong></p> <pre><code>QVariant TableModel::data(const QModelIndex &amp;index, int role) const { if(!index.isValid()) return QVariant();//currently it is returning from here, why??? switch(role) { case Qt::DisplayRole: { if(index.column()==0) return QString::number(array[index.row()][index.column()]); break; } } } </code></pre>
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    1. COit is only possible if r and c exceed value rowCount and columnCount.
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    2. COalso initialization need to modify constructor. You can make a function like your Initialize(..) to modify.
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