/// <summary>
/// inserts an iterable button at position (row, column)
/// </summary>
/// <param name="button"></param>
/// <param name="row"></param>
/// <param name="column"></param>
public void InsertAt(IterableButton button, int row, int column)
{
if (button == null)
{
string error = "InsertAt was passed a null " + typeof(IterableButton) + " in scene object " + name;
throw new NullReferenceException(error);
}
if (row > Grid.Count - 1)
{
string error = "InsertAt was passed a row number " + row + " that is outofbounds in scene object " + name + ". Total number of rows" +
"are " + Grid.Count;
throw new IndexOutOfRangeException(error);
}
int maxButtonsPerRow = CalculateMaxButtonsPerRow();
int siblingIndex = maxButtonsPerRow * row + column; //this indexes the child in the scene
button.SetRowAndColumnIndex(row, column);
button.transform.SetSiblingIndex(siblingIndex);
Grid[row].Row.Insert(row, button);
//shift to the right, starting from the next column
ShiftRight(button, row, column + 1);
//UpdateNavigation();
_count++;
}
/// <summary>
/// Inserts a button into the grid, returning the Iterable button that was inserted
/// </summary>
/// <returns></returns>
public IterableButton InsertNewButtonNoNavUpdate()
{
IterableButton button;
if (_rootButton == null) //is there a root?
{
//check the inactive pool, does it have any usable items?
if (InactiveButtonPool.Count > 0)
{
_rootButton = InactiveButtonPool[0];
_rootButton.SetRowAndColumnIndex(0, 0);
}
else
{
_rootButton = BuildIterableButton(0, 0);
}
if (Grid.Count != 0)
{
Grid[0].Row.Add(_rootButton);
_lastRowUsed = Grid[0];
}
else
{
ButtonRow newRow = new ButtonRow(_rootButton, 0);
Grid.Add(newRow);
_lastRowUsed = newRow;
}
button = _rootButton;
EventSystem.current.SetSelectedGameObject(_rootButton.Button.gameObject);
}
else //yes. now check if its possible to insert this new button into the last row that was used.
{
IterableButton newIterableButton;
//first, check if there are too many buttons in the last row used. if there are none, insert this button, then update navigation pointers
if (_lastRowUsed.Count < MaxButtonsPerRow)
{
int newColumnIndex = _lastRowUsed.Count;
int rowIndex = _lastRowUsed.RowId;
newIterableButton = BuildIterableButton(rowIndex, newColumnIndex);
_lastRowUsed.Add(newIterableButton);
}
else
{
const int newColumnId = 0;
int rowId = _lastRowUsed.RowId + 1;
newIterableButton = BuildIterableButton(rowId, newColumnId);
ButtonRow newButtonRow = new ButtonRow(newIterableButton, rowId);
Grid.Add(newButtonRow);
_lastRowUsed = newButtonRow;
}
button = newIterableButton;
}
_count++;
return(button);
}
/// <summary>
/// If the field Button prefab is set to null, create a generic button, returning its IterableButton component
/// </summary>
/// <param name="rowId"></param>
/// <param name="columnId"></param>
/// <returns></returns>
private IterableButton BuildIterableButton(int rowId, int columnId)
{
//lets check the inactive pool first
if (InactiveButtonPool.Count == 0)
{
if (ButtonPrefab == null)
{
var emptyGameObject = new GameObject("Button");
emptyGameObject.transform.SetParent(ParentRectTransform);
emptyGameObject.AddComponent <Image>();
Button button = emptyGameObject.AddComponent <Button>();
ColorBlock colors = button.colors;
colors.highlightedColor = HighlightedButtonColor;
button.colors = colors;
IterableButton b = emptyGameObject.AddComponent <IterableButton>();
b.Init(rowId, columnId, button);
b.transform.SetAsLastSibling();
return(b);
}
{
try
{
GameObject go = Instantiate(ButtonPrefab);
go.transform.SetParent(ParentRectTransform);
IterableButton b = go.AddComponent <IterableButton>();
Button button = GetComponent <Button>();
ColorBlock colors = button.colors;
colors.highlightedColor = HighlightedButtonColor;
button.colors = colors;
b.Init(rowId, columnId, button);
b.transform.SetAsLastSibling();
return(b);
}
catch (NoButtonAttachedToPrefabException ex)
{
Debug.Log(ex.StackTrace);
throw;
}
}
}
else //return one of the iterable buttons in the pool
{
IterableButton b = InactiveButtonPool[0];
b.Activate();
b.transform.SetAsLastSibling();
b.SetRowAndColumnIndex(rowId, columnId);
InactiveButtonPool.RemoveAt(0);
return(b);
}
}
