private void CaculateRecordIndexRatio()
{
var totalRecordsCount = Math.Round((totalHeight) / rowHeight);
double rowStartHeight = 0;
for (var index = 1; index <= totalRecordsCount; index++)
{
var rowInfoModel = new RowInfoModel()
{
RowIndex = index,
StartValue = rowStartHeight,
EndValue = rowHeight * index
};
TotalRowCollection.Add(index, rowInfoModel);
rowStartHeight = rowHeight * index;
}
}
public void CalculateVisibleRowsCalculation()
{
if (VisibleRowCollection == null)
{
VisibleRowCollection = new Dictionary <int, RowInfoModel>();
}
var visibleRecordsCount = Math.Round((viewPortHeight) / rowHeight);
double rowStartHeight = 0;
for (var index = 1; index <= visibleRecordsCount; index++)
{
var rowInfoModel = new RowInfoModel()
{
RowIndex = index,
StartValue = rowStartHeight,
EndValue = rowHeight * index
};
VisibleRowCollection.Add(index, rowInfoModel);
rowStartHeight = rowHeight * index;
}
}
private bool CheckNumnber(RowInfoModel rowData, double checkableValue)
{
return(checkableValue > rowData.StartValue && checkableValue > rowData.EndValue);
}
private bool GetNewRowIndex(RowInfoModel rowData, double checkableValue)
{
return(checkableValue > rowData.StartValue && checkableValue <= rowData.EndValue);
}
