/// <summary>
/// Creates a new connection from the active item to the given item
/// </summary>
/// <param name="itemName">name of the given item</param>
/// <param name="direction">direction where the given item should be placed</param>
public void CreateConnection(string itemName, ConnectionDirections.Direction direction)
{
Item itemOne = m_Items.ActiveItem;
Item itemTwo = m_Items.GetItem(itemName);
ConnectionDirections.Direction oppositDirection = ConnectionDirections.GetOppositeDirection(direction);
ItemConnection newConnection = new ItemConnection(itemOne, itemTwo);
m_ItemConnections.AddConnection(newConnection);
itemOne.AddConnection(direction, newConnection);
itemTwo.AddConnection(oppositDirection, newConnection);
}
/// <summary>
/// Returns the start point for a connection to an other object
/// </summary>
/// <param name="top"></param>
/// <param name="left"></param>
/// <returns></returns>
private int[] GetItemConnectionPoints(ConnectionDirections.Direction direction,int top, int left)
{
int[] position = new int[4];
switch (direction)
{
case ConnectionDirections.Direction.North:
position[0] = top;
position[1] = left + ITEM_WIDTH / 2;
position[2] = position[0] - CONNECTION_LENGTH;
position[3] = position[1];
break;
case ConnectionDirections.Direction.South:
position[0] = top + ITEM_HEIGTH;
position[1] = left + ITEM_WIDTH / 2;
position[2] = position[0] + CONNECTION_LENGTH;
position[3] = position[1];
break;
case ConnectionDirections.Direction.East:
position[0] = top + ITEM_HEIGTH / 2;
position[1] = left + ITEM_WIDTH;
position[2] = position[0];
position[3] = position[1] + CONNECTION_LENGTH;
break;
case ConnectionDirections.Direction.West:
position[0] = top + ITEM_HEIGTH / 2;
position[1] = left;
position[2] = position[0];
position[3] = position[1] - CONNECTION_LENGTH;
break;
case ConnectionDirections.Direction.NorthWest:
position[0] = top + ITEM_HEIGTH / 6;
position[1] = left + ITEM_WIDTH / 6;
position[2] = position[0] - GetDiagonalConnectorY();
position[3] = position[1] - GetDiagonalConnectorX();
break;
case ConnectionDirections.Direction.NorthEast:
position[0] = top + ITEM_HEIGTH / 6;
position[1] = left + 5 * ITEM_WIDTH / 6;
position[2] = position[0] - GetDiagonalConnectorY();
position[3] = position[1] + GetDiagonalConnectorX();
break;
case ConnectionDirections.Direction.SouthEast:
position[0] = top + 5 * ITEM_HEIGTH / 6;
position[1] = left + 5 * ITEM_WIDTH / 6;
position[2] = position[0] + GetDiagonalConnectorY();
position[3] = position[1] + GetDiagonalConnectorX();
break;
case ConnectionDirections.Direction.SouthWest:
position[0] = top + 5 * ITEM_HEIGTH / 6;
position[1] = left + ITEM_WIDTH / 6;
position[2] = position[0] + GetDiagonalConnectorY();
position[3] = position[1] - GetDiagonalConnectorX();
break;
default:
position[0] = top;
position[1] = left;
break;
}
return position;
}
/// <summary>
/// Gets the item position based of a connection point
/// </summary>
/// <param name="direction">connection point direction</param>
/// <param name="top">top</param>
/// <param name="left">left</param>
/// <returns>position</returns>
private int[] GetElementPosition(ConnectionDirections.Direction direction, int top, int left)
{
int[] position = new int[2];
switch (direction)
{
case ConnectionDirections.Direction.North:
position[0] = top;
position[1] = left - ITEM_WIDTH / 2;
break;
case ConnectionDirections.Direction.South:
position[0] = top - ITEM_HEIGTH;
position[1] = left - ITEM_WIDTH / 2;
break;
case ConnectionDirections.Direction.East:
position[0] = top - ITEM_HEIGTH / 2;
position[1] = left - ITEM_WIDTH;
break;
case ConnectionDirections.Direction.West:
position[0] = top - ITEM_HEIGTH / 2;
position[1] = left;
break;
case ConnectionDirections.Direction.NorthEast:
position[0] = top - ITEM_HEIGTH / 6;
position[1] = left - 5 * ITEM_WIDTH / 6;
break;
case ConnectionDirections.Direction.NorthWest:
position[0] = top - ITEM_HEIGTH / 6;
position[1] = left - ITEM_WIDTH / 6;
break;
case ConnectionDirections.Direction.SouthEast:
position[0] = top - 5*ITEM_HEIGTH / 6;
position[1] = left - 5 * ITEM_WIDTH / 6;
break;
case ConnectionDirections.Direction.SouthWest:
position[0] = top - 5 * ITEM_HEIGTH / 6;
position[1] = left - ITEM_WIDTH / 6;
break;
default:
position[0] = top;
position[1] = left;
break;
}
return position;
}
/// <summary>
/// Displays the substructure of an element.
/// </summary>
/// <param name="element">mindmap item</param>
/// <param name="top">current position top</param>
/// <param name="left">current position left</param>
private void DisplaySubStructure(Item element, int top, int left, ConnectionDirections.Direction excludingDirection)
{
int[] connectionPoints;
int[] newElementPosition;
ConnectionDirections.Direction oppositeDirection;
Item nextElement;
foreach (KeyValuePair<ConnectionDirections.Direction,ItemConnection> connection in element.Connections)
{
if (connection.Key != excludingDirection)
{
connectionPoints = GetItemConnectionPoints(connection.Key, top, left);
oppositeDirection = ConnectionDirections.GetOppositeDirection(connection.Key);
newElementPosition = GetElementPosition(oppositeDirection,connectionPoints[2], connectionPoints[3]);
DisplayConnection(connectionPoints[0], connectionPoints[1], connectionPoints[2], connectionPoints[3]);
nextElement = connection.Value.GetOtherItem(element.Name);
DisplayItemElement(nextElement, newElementPosition[0], newElementPosition[1]);
DisplaySubStructure(nextElement, newElementPosition[0], newElementPosition[1], oppositeDirection);
}
}
}
/// <summary>
/// Releases the given connection from the item
/// </summary>
/// <param name="connection"></param>
public void ReleaseConnectionFromItem(ConnectionDirections.Direction direction)
{
m_Connections.Remove(direction);
}
/// <summary>
/// Register the connection at the item
/// </summary>
/// <param name="direction">direction of the connection</param>
/// <param name="connection">connection</param>
public void AddConnection(ConnectionDirections.Direction direction, ItemConnection connection)
{
m_Connections.Add(direction, connection);
}