protected override void OnMouseDown(MouseEventArgs e)
{
//foreach(Control ctl in this.Controls)
if (e.Button == MouseButtons.Left)
{
if (this.Tool == DrawingTools.Node)
{
int m = 'Z' - 'A' + 2;
if (this.Controls.Count == m)
{
MessageBox.Show("You can only add " + m + " nodes to graph");
return;
}
AddNewNode(e.Location);
}
else if (this.Tool == DrawingTools.Edge || this.Tool == DrawingTools.Eraser)
{
int count = 0;
foreach (var edge in _edges)
{
var start = this.Controls[edge.Start].Location;
start.X += NODE_RADIUS;
start.Y += NODE_RADIUS;
var end = this.Controls[edge.End].Location;
end.X += NODE_RADIUS;
end.Y += NODE_RADIUS;
if (Edge.Contains(start, end, e.Location))
{
if (this.Tool == DrawingTools.Edge)
{
_edges.SelectedIndex = count;
}
else if (this.Tool == DrawingTools.Eraser)
{
_edges.RemoveAt(count);
_edges.SelectedIndex = -1;
}
this.Invalidate();
break;
}
count++;
}
}
else if (this.Tool == DrawingTools.Eraser) // delete edge
{
}
}
OnContentChanged(null, null);
base.OnMouseDown(e);
}
