//Get the inputed values for nodes and links. Delete the current graph.
//Create random non overlaping nodes and add them to the new graph.
//Create random non existant links with random weights between existing nodes and add them to the graph.
//Than deselect everything and redraw the panel.
private void GenerateRandomButton_Click(object sender, EventArgs e)
{
decimal nodesCount = this.RandomNodesUpDown.Value;
decimal linksCount = this.RandomLinksUpDown.Value;
int nodesInGraph = this.graph.Nodes.Count;
for (int i = 0; i < nodesInGraph; i++)
{
this.graph.RemoveNode(this.graph.Nodes[0]);
}
Random random = new Random();
decimal createdNodes = 0;
while (createdNodes < nodesCount)
{
int randomX = random.Next((int)Node.NODE_SIZE, this.Visualization.Width - (int)Node.NODE_SIZE);
int randomY = random.Next((int)Node.NODE_SIZE, this.Visualization.Height - (int)Node.NODE_SIZE);
IPoint center = new Point(randomX, randomY);
if (!this.graph.Nodes.Any(n => CheckDistanceBetweenCenters(center, n.Center)))
{
this.currentMaxLayer += 1;
this.graph.AddNode(this.currentMaxLayer, center);
createdNodes += 1;
}
}
decimal createdLinks = 0;
while (createdLinks < linksCount)
{
int randomNode1 = random.Next(0, this.graph.Nodes.Count);
int randomNode2 = random.Next(0, this.graph.Nodes.Count);
if (randomNode1 == randomNode2)
{
continue;
}
int weight = random.Next(MINIMUM_RANDOM_WEIGHT, MAXIMUM_RANDOM_WEIGHT);
INode node1 = this.graph.Nodes[randomNode1];
INode node2 = this.graph.Nodes[randomNode2];
if (!node1.ConnectedLinks.Any(l => (l.ConnectedNodes.Item1 == node1 && l.ConnectedNodes.Item2 == node2) ||
(l.ConnectedNodes.Item1 == node2 && l.ConnectedNodes.Item2 == node1)))
{
this.graph.AddLink(node1, node2, weight);
createdLinks += 1;
}
}
DeselectLink();
this.selectedNode = null;
this.graph.Source = null;
this.graph.Destination = null;
this.source = null;
this.destination = null;
this.Visualization.Refresh();
}
//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();
}
}
}
