//Resets link related values
private void DeselectLink()
{
this.selectedLink = null;
this.Node1NumericUpDown.Value = 0;
this.Node2NumericUpDown.Value = 0;
this.WeightNumericUpDown.Value = 0;
}
//If there is a selected link check if inputed nodes both exist and are different
//and a link doesn't already exist between them.
//If it doesn't call RemoveLink in graph with than call AddLink method in graph and set it as the selected link
//and redraw panel.
//If a link already exists then check if new and old weights are different.
//If they are change the weight and redraw panel.
private void EditLinkButton_Click(object sender, EventArgs e)
{
if (this.selectedLink != null)
{
INode newNode1 = this.graph.Nodes.FirstOrDefault(n => n.NodeNumber == this.Node1NumericUpDown.Value);
INode newNode2 = this.graph.Nodes.FirstOrDefault(n => n.NodeNumber == this.Node2NumericUpDown.Value);
int newWeight = (int)this.WeightNumericUpDown.Value;
if (newNode1 != null && newNode2 != null && newNode1 != newNode2)
{
bool linkExists = newNode1.ConnectedLinks.Any(l =>
(l.ConnectedNodes.Item1 == newNode1 && l.ConnectedNodes.Item2 == newNode2) ||
(l.ConnectedNodes.Item2 == newNode1 && l.ConnectedNodes.Item1 == newNode2));
if (!linkExists)
{
this.graph.RemoveLink(this.selectedLink.Link);
this.selectedLink = new LinkDraw(this.graph.AddLink(newNode1, newNode2, newWeight));
this.Visualization.Refresh();
}
else if (linkExists && newWeight != this.selectedLink.Link.Weight)
{
this.selectedLink.Link.ChangeWeight(newWeight);
this.Visualization.Refresh();
}
}
}
}
public GraphCreator(IGraph graph, IExporter exporter, IImporter importer)
{
InitializeComponent();
this.graph = graph;
this.exporter = exporter;
this.importer = importer;
this.selectedLink = null;
this.selectedNode = null;
this.currentMaxLayer = DEFAULT_CURRENT_MAX_LAYER;
this.source = null;
this.destination = null;
}
//If a mouse button is presed saves coordinates of cursor.
//If its the left mouse button visually deselect link or node if any.
//Than check if cursor is on any node.
//If true than increase current layer, deselect link, set node to selected node change its layer and redraw it in red.
//If false then check if currsor is on any link
//If true then deselect node, set link as selected link, redraw it and set its values from input.
//If cursor is not on any link or node then deselect currently selected node and link if any
private void Visualization_MouseDown(object sender, MouseEventArgs e)
{
this.mouseDownXCoordinate = e.X;
this.mouseDownYCoordinate = e.Y;
if (e.Button == MouseButtons.Left)
{
IPoint cursorPosition = new Point(e.X, e.Y);
if (this.selectedNode != null)
{
if (this.source != null && this.selectedNode.Node == this.source.Node)
{
this.selectedNode.Draw(this.Visualization.CreateGraphics(), Color.Blue);
}
else if (this.destination != null && this.selectedNode.Node == this.destination.Node)
{
this.selectedNode.Draw(this.Visualization.CreateGraphics(), Color.Green);
}
else
{
this.selectedNode.Draw(this.Visualization.CreateGraphics(), Color.Black);
}
}
if (this.selectedLink != null)
{
this.selectedLink.Draw(this.Visualization.CreateGraphics(), Color.Black);
}
bool cursorIsOnAnyLinkOrNode = false;
foreach (INode node in this.graph.Nodes.OrderByDescending(n => n.Layer))
{
bool isInsideNode = node.Contains(cursorPosition);
if (isInsideNode)
{
this.currentMaxLayer += 1;
this.selectedNode = new NodeDraw(node);
DeselectLink();
this.selectedNode.Node.ChangeCurrentLayer(this.currentMaxLayer);
this.selectedNode.Draw(this.Visualization.CreateGraphics(), Color.Red);
cursorIsOnAnyLinkOrNode = true;
break;
}
}
if (!cursorIsOnAnyLinkOrNode)
{
foreach (INode node in this.graph.Nodes)
{
foreach (ILink link in node.ConnectedLinks)
{
bool isInsideLink = link.Contains(cursorPosition);
if (isInsideLink)
{
this.selectedLink = new LinkDraw(link);
this.selectedNode = null;
this.selectedLink.Draw(this.Visualization.CreateGraphics(), Color.Red);
this.Node1NumericUpDown.Value = this.selectedLink.Link.ConnectedNodes.Item1.NodeNumber;
this.Node2NumericUpDown.Value = this.selectedLink.Link.ConnectedNodes.Item2.NodeNumber;
this.WeightNumericUpDown.Value = this.selectedLink.Link.Weight;
cursorIsOnAnyLinkOrNode = true;
break;
}
}
if (cursorIsOnAnyLinkOrNode)
{
break;
}
}
}
if (!cursorIsOnAnyLinkOrNode)
{
this.selectedNode = null;
DeselectLink();
}
}
}
