private void RemoveVertex(VertexControl ellipse)
{
var vertex = _ellipses[ellipse];
_vertices.Remove(vertex);
_ellipses.Remove(ellipse);
Container.Children.Remove(ellipse);
_graph.DeleteVertex(vertex);
}
/// <summary>
/// Обрабатывает событие нажатия на вершину, при добавлении нового ребра.
/// </summary>
private void CreateEdge(VertexControl ellipse, Point mousePosition)
{
switch (_currentCreateEdgeActionState)
{
case CreateEdgeActionState.SelectFirstVertex:
_edgeStart = ellipse;
var startPointX = Canvas.GetLeft(_edgeStart) + VertexSettings.Size / 2;
var startPointY = Canvas.GetTop(_edgeStart) + VertexSettings.Size / 2;
var finishPointX = mousePosition.X + VertexSettings.Size / 2;
var finishPointY = mousePosition.Y + VertexSettings.Size / 2;
var startPoint = new Point(startPointX, startPointY);
var endPoint = new Point(finishPointX, finishPointY);
_movingLine = InitializeLine(startPoint, endPoint);
Container.Children.Add(_movingLine);
_currentCreateEdgeActionState = CreateEdgeActionState.SelectSecondVertex;
break;
case CreateEdgeActionState.SelectSecondVertex:
_edgeFinish = ellipse;
if (Equals(_edgeFinish, _edgeStart) ||
_ellipses[_edgeStart].AdjacentVertices.Contains(_ellipses[_edgeFinish]))
{
break;
}
var finishX = Canvas.GetLeft(_edgeFinish) + VertexSettings.Size / 2;
var finishY = Canvas.GetTop(_edgeFinish) + VertexSettings.Size / 2;
_movingLine.X2 = finishX;
_movingLine.Y2 = finishY;
var edge = _graph.AddEdge(_ellipses[_edgeStart], _ellipses[_edgeFinish]);
_edges[edge] = _movingLine;
_lines[_movingLine] = edge;
_movingLine.MouseEnter += (sender, args) => ((Line)sender).StrokeThickness = 10;
_movingLine.MouseLeave += (sender, args) => ((Line)sender).StrokeThickness = 5;
var weightTextBox = InitializeWeightTextBox(_movingLine);
_edgeWeightMapping[edge] = weightTextBox;
_weightEdgeMapping[weightTextBox] = edge;
UpdateWeightTextBoxPosition(_movingLine);
Container.Children.Add(weightTextBox);
_currentCreateEdgeActionState = CreateEdgeActionState.SelectFirstVertex;
_movingLine = null;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
/// <summary>
/// Создает контрол вершины с требуемыми параметрами.
/// </summary>
/// <param name="vertex"></param>
/// <param name="point">Координаты вершины.</param>
/// <returns></returns>
private VertexControl InitializeVertexControl(Vertex vertex, Point point)
{
var vertexControl = new VertexControl(vertex.Index)
{
Style = FindResource("Vertex") as Style
};
Panel.SetZIndex(vertexControl, VertexSettings.ZIndex);
Canvas.SetTop(vertexControl, point.Y);
Canvas.SetLeft(vertexControl, point.X);
return(vertexControl);
}
private void StartMovingVertex(VertexControl ellipse)
{
_isVertexMoving = true;
Panel.SetZIndex(ellipse, VertexSettings.MovingZIndex);
_movingEllipse = ellipse;
}