/// <summary>
/// Updates layout grid by specified action. Either by adding new rows/columns for the new photo or removing them.
/// </summary>
/// <param name="layoutGrid">LayoutGrid whose layout is updated.</param>
/// <param name="action">Action with which to update the layout.</param>
private static void UpdateLayout(LayoutGrid layoutGrid, LayoutAction action)
{
int cellCount = layoutGrid.CellCount;
byte rowCount = layoutGrid.LayoutMatrix[0];
byte columnCount = layoutGrid.LayoutMatrix[1];
// Depending on the layout orientation, whether new columns are added first or new rows, different methods are called
if (layoutGrid.LayoutOrientation == LayoutOrientation.ColumnFirst)
{
UpdateLayoutColumnFirst(rowCount, columnCount, cellCount, layoutGrid, action);
}
else
{
UpdateLayoutRowFirst(rowCount, columnCount, cellCount, layoutGrid, action);
}
}
/// <summary>
/// Updates layout grid's layout, by rows, based on the action - either with addition of a new row or with the removal of the last one.
/// </summary>
/// <param name="rowCount">Max rows count of the final layout.</param>
/// <param name="columnCount">Max column count of the final layout.</param>
/// <param name="cellCount">Number of cells - photos currently in the grid.</param>
/// <param name="layoutGrid">Layout grid whose layout is updating.</param>
/// <param name="action">Action which is done upon a layout.</param>
private static void UpdateLayoutRowFirst(byte rowCount, byte columnCount, int cellCount, LayoutGrid layoutGrid, LayoutAction action)
{
int col = (cellCount - 1) / rowCount;
int row = (cellCount - 1) % rowCount;
if (action == LayoutAction.Addition)
{
AddRowFirst(row, col, layoutGrid);
}
else
{
RemoveRowFirst(rowCount, cellCount, col, layoutGrid);
}
}
/// <summary>
/// Updates layout grid's layout, by columns, based on the action - either with addition of a new column or with the removal of the last one.
/// </summary>
/// <param name="rowCount">Max row count of the final layout.</param>
/// <param name="columnCount">Max column count of the final layout.</param>
/// <param name="cellCount">Number of cells - photos currently in the grid.</param>
/// <param name="layoutGrid">Layout grid whose layout is updating.</param>
/// <param name="action">Action which is done upon a layout.</param>
private static void UpdateLayoutColumnFirst(byte rowCount, byte columnCount, int cellCount, LayoutGrid layoutGrid, LayoutAction action)
{
int row = (cellCount - 1) / columnCount; // Find which row needs a column added/removed
int col = (cellCount - 1) % columnCount; // Find index of the next column in the above row
if (action == LayoutAction.Addition)
{
AddColumnFirst(row, col, layoutGrid);
}
else
{
RemoveColumnFirst(columnCount, cellCount, row, layoutGrid);
}
}
public void Visit(LayoutAction action)
{
Actions.Add(action);
}
