/// <summary>
/// Creates a new FocusManager
/// </summary>
/// <param name="rootControl">The control which represents</param>
/// <param name="startControl"></param>
/// <exception cref="ArgumentNullException">Is thrown if <paramref name="startControl"/> or <paramref name="rootControl"/> is null</exception>
/// <exception cref="ArgumentException">Is thrown if <paramref name="startControl"/> has no container</exception>
/// <exception cref="ArgumentException">Is thrown if <paramref name="startControl"/> is no IInputHandler</exception>
/// <exception cref="ArgumentException">Is thrown if <paramref name="rootControl"/> has an container</exception>
/// <exception cref="ArgumentException">Is thrown if <paramref name="startControl"/> is not within <paramref name="rootControl"/></exception>
public FocusManager(ContainerControl rootControl, Control startControl)
{
if (rootControl == null)
throw new ArgumentNullException("rootControl");
if (rootControl.Container != null)
throw new ArgumentException("rootControl has an container!", "rootControl");
if (startControl == null)
throw new ArgumentNullException("startControl");
if (startControl.Container == null)
throw new ArgumentException("startControl doesn't have an container!", "startControl");
if (!(startControl is IInputHandler))
throw new ArgumentException("startControl isn't an IInputHandler!", "startControl");
_rootControl = rootControl;
CalculateList();
_focusedIndex = -1;
for (int i = 0; i < _controls.Length; i++)
{
if (_controls[i] == startControl)
{
_focusedIndex = i;
_controls[i].IsFocused = true;
}
else
{
_controls[i].IsFocused = false;
}
}
if(_focusedIndex == -1)
throw new ArgumentException("startControl is not within rootControl", "startControl");
}
/// <summary>
/// Sets the color of <paramref name="c"/> and all its sub-controls to <paramref name="fColor"/> and <paramref name="bColor"/>
/// </summary>
/// <param name="c">The control to set the color of</param>
/// <param name="fColor">The foreground color to set</param>
/// <param name="bColor">The background color to set</param>
private void SetControlColors(Control c, ConsoleColor fColor, ConsoleColor bColor)
{
if (!c._foreColorSet) c._foreColor = fColor;
if (!c._backColorSet) c._backColor = bColor;
if (c is ContainerControl)
{
foreach (var cc in c as ContainerControl)
{
SetControlColors(cc, fColor, bColor);
}
}
}
/// <summary>
/// Searches all controlls which are nearby <paramref name="c"/>.
/// Controls in the same row are searched if <paramref name="checkTop"/> is <code>true</code>.
/// Controls in the same collumn are searched if <paramref name="checkLeft"/> is <code>true</code>.
/// </summary>
/// <param name="c"></param>
/// <param name="checkTop"></param>
/// <param name="checkLeft"></param>
/// <returns>A list of controls nearby <paramref name="c"/></returns>
private IEnumerable<int> GetNearbyControls(Control c, bool checkTop = false, bool checkLeft = false)
{
if(c.Drawer == null)
yield break;
for (int i = 0; i < _controls.Length; i++)
{
if(_controls[i].Drawer == null)
continue;
if (c.Drawer.Boundary.Top == _controls[i].Drawer.Boundary.Top && checkTop ||
c.Drawer.Boundary.Left == _controls[i].Drawer.Boundary.Left && checkLeft)
yield return i;
}
}
/// <summary>
/// Subscribes <code>RedrawRequested</code> to <code>Control.RedrawRequested</code> on <paramref name="control"/> and all its child-controls.
/// Also subscribes <code>OnControlAdded</code> to <code>ContainerControl.ControlAdded</code> if <paramref name="control"/> is an <code>ContainerControl</code>
/// </summary>
/// <param name="control">The control to whose events should be subscribed</param>
/// <seealso cref="RemoveControlEvents"/>
private void WireControlEvents(Control control)
{
control.RedrawRequested += RedrawRequested;
if (control is ContainerControl)
{
var container = control as ContainerControl;
container.ControlAdded += OnControlAdded;
foreach (var c in container)
WireControlEvents(c);
}
}
