private void UpdateRecordBindingContext(int newRowIndex, GridRowPanel rowPanel, IList itemsSource, int oldRowIndex)
{
var record =
(Children.FirstOrDefault(row =>
{
var gridRowPanel = row as GridRowPanel;
return(gridRowPanel != null && gridRowPanel.RowIndex == oldRowIndex);
}) as GridRowPanel);
if (record == null)
{
return;
}
record.RowIndex = oldRowIndex != -1 ? newRowIndex : rowPanel.RowIndex;
var i = 1;
foreach (var recordChild in record.Children)
{
if (i > -1)
{
recordChild.BindingContext = null;
recordChild.BindingContext = itemsSource[(newRowIndex * 2) - i];
}
--i;
}
}
private void UpdateAndCreateRow(int newRowIndex, int oldRowIndex)
{
var itemList = DependencyService.Get <IDataView>().ItemsSource;
var itemsSource = itemList as IList;
if (oldRowIndex != -1)
{
var record = RowPanel.FirstOrDefault(row => (row as GridRowPanel).RowIndex == newRowIndex);
UpdateRecordBindingContext(oldRowIndex, record as GridRowPanel, itemsSource, newRowIndex);
return;
}
var rowPanel = new GridRowPanel();
for (var rowIndexer = 0; rowIndexer < 2; rowIndexer++)
{
if (rowPanel == null)
{
rowPanel = new GridRowPanel();
}
var columnIndex = rowIndexer % 2;
rowPanel.VisibleRowIndex = newRowIndex;
var cellPanel = new GridCellPanel {
ColIndex = columnIndex
};
var view = GenerateViewFromTemplate(itemsSource[(newRowIndex * 2) - rowIndexer]);
cellPanel.BindingContext = itemsSource[(newRowIndex * 2) - rowIndexer];
cellPanel.Children.Add(view);
rowPanel.Children.Add(cellPanel);
if (columnIndex < 1)
{
continue;
}
rowPanel.RowIndex = ++newRowIndex;
if (Children.All(row =>
{
var gridRowPanel = row as GridRowPanel;
return(gridRowPanel != null && gridRowPanel.RowIndex != rowPanel.RowIndex);
}))
{
if (Children.Any(row =>
{
var gridRowPanel = row as GridRowPanel;
return(gridRowPanel != null && gridRowPanel.RowIndex == -1);
}))
{
UpdateRecordBindingContext(newRowIndex - 1, rowPanel, itemsSource, oldRowIndex);
}
else
{
Children.Add(rowPanel.Clone());
Debug.WriteLine("New Child added at row {0}", rowPanel.RowIndex);
RowPanel = Children;
ForceLayout();
}
}
rowPanel = null;
}
}
internal void GenerateRows()
{
if (Children.Count > 0)
{
Debug.WriteLine("ReMeasured");
return;
}
var itemList = DependencyService.Get <IDataView>().ItemsSource;
var itemsSource = itemList as IList;
if (itemsSource != null && itemsSource.Count <= 0)
{
return;
}
rowCount = Math.Round(viewPortHeight / SGridView.GridSize.RowHeight) * 2;
var rowPanel = new GridRowPanel();
for (var rowIndexer = 0; rowIndexer < rowCount; rowIndexer++)
{
if (rowPanel == null)
{
rowPanel = new GridRowPanel();
}
var columnIndex = rowIndexer % 2;
var rowIndex = (int)Math.Floor(rowIndexer / (float)2);
var cellPanel = new GridCellPanel {
ColIndex = columnIndex
};
var view = GenerateViewFromTemplate(itemsSource[rowIndexer]);
cellPanel.BindingContext = itemsSource[rowIndexer];
cellPanel.Children.Add(view);
rowPanel.Children.Add(cellPanel);
rowPanel.VisibleRowIndex = rowIndex;
rowPanel.RowIndex = ++rowIndex;
if (columnIndex < 1)
{
continue;
}
Children.Add(rowPanel.Clone());
rowPanel = null;
}
ForceLayout();
}