/// <summary>
/// Thêm đỉnh vào đồ thị
/// </summary>
/// <param name="point"></param>
public TopGraphPoint addPoint(int r,Color color,int x,int y)
{
if (countPoint >= Points.Length) throw new Exception("Vượt quá số đỉnh tối đa của đồ thị");
else
{
int index = countPoint;
if (countPoint < alphabet.Length)
{
index = countPoint%alphabet.Length;
}
TopGraphPoint point= new TopGraphPoint(new string(alphabet[index], 1), r, color, x, y);
this.Points[countPoint] = point;
this.countPoint++;
return point;
}
}
private bool inblacklist(TopGraphPoint point1,TopGraphPoint point2)
{
foreach (var item in blackList)
{
if (item[0] == point1 && item[1] == point2) return true;
}
return false;
}
/// <summary>
/// Nối 2 điểm sử dụng khi vẽ cây khung nhỏ nhất
/// </summary>
/// <param name="point1"></param>
/// <param name="point2"></param>
/// <param name="color"></param>
/// <param name="size"></param>
/// <param name="pictureBox"></param>
private void connectPoint(TopGraphPoint point1, TopGraphPoint point2, Color color)
{
Graphics G = pictureBox.CreateGraphics();
G.SmoothingMode = SmoothingMode.AntiAlias;
Pen p = new Pen(color, 4);
p.StartCap = LineCap.Round;
p.EndCap = LineCap.ArrowAnchor;
p.DashCap = DashCap.Triangle;
int x1 = point1.x, y1 = point1.y, x2 = point2.x, y2 = point2.y;
if (point1.x < point2.x)
{
x1 = point1.x + point1.r;
x2 = point2.x - point1.r;
}
else
{
x1 = point1.x - point1.r;
x2 = point2.x + point2.r;
}
if (point1.y < point2.y)
{
y1 = point1.y + point1.r;
y2 = point2.y - point2.r;
}
else
{
y1 = point1.y - point1.r;
y2 = point2.y + point2.r;
}
#region Vẽ đồ thị có hướng
if (this.GrapType == 1)
{
if (point1 > point2)
{
x1 += 10;
y1 += 10;
x2 += 10;
y2 += 10;
}
else
{
x1 -= 10;
y1 -= 10;
x2 -= 10;
y2 -= 10;
}
}
#endregion
#region Vẽ đồ thị vô hướng
else
{
//G.DrawLine(p, x1, y1, x2, y2);
}
#endregion
G.DrawLine(p, x1, y1, x2, y2);
}
/// <summary>
/// Nối 2 điểm với nhau
/// </summary>
/// <param name="point1"></param>
/// <param name="point2"></param>
/// <param name="color"></param>
/// <param name="pictureBox"></param>
private void connectPoint(TopGraphPoint point1, TopGraphPoint point2,int value)
{
Graphics G = pictureBox.CreateGraphics();
G.SmoothingMode=SmoothingMode.AntiAlias;
Pen p;
#region Vẽ đồ thị có hướng
int x1 = point1.x, y1 = point1.y, x2 = point2.x, y2 = point2.y;
if (this.GrapType == 1)
{
p = new Pen(point1.color, 3);
p.StartCap = LineCap.Round;
p.EndCap = LineCap.ArrowAnchor;
p.DashCap = DashCap.Triangle;
if (point1.x < point2.x)
{
x1 = point1.x + point1.r;
x2 = point2.x - point1.r;
}
else
{
x1 = point1.x - point1.r;
x2 = point2.x + point2.r;
}
if (point1.y < point2.y)
{
y1 = point1.y + point1.r;
y2 = point2.y - point2.r;
}
else
{
y1 = point1.y - point1.r;
y2 = point2.y + point2.r;
}
if (point1 > point2)
{
x1 += 10;
y1 += 10;
x2 += 10;
y2 += 10;
}
else
{
x1 -= 10;
y1 -= 10;
x2 -= 10;
y2 -= 10;
}
}
#endregion
#region Vẽ đồ thị vô hướng
else
{
p = new Pen(point1.color, 2);
if (point1.x < point2.x)
{
x1 = point1.x + point1.r;
x2 = point2.x - point1.r;
}
else
{
x1 = point1.x - point1.r;
x2 = point2.x + point2.r;
}
if (point1.y < point2.y)
{
y1 = point1.y + point1.r;
y2 = point2.y - point2.r;
}
else
{
y1 = point1.y - point1.r;
y2 = point2.y + point2.r;
}
}
int x_text = (x1 + x2) / 2 - point1.r / 2;
int y_text = (y1 + y2) / 2 - point1.r / 2;
G.DrawLine(p, x1, y1, x2, y2);
Rectangle rectangle = new Rectangle(x_text, y_text, point1.r, point1.r);
G.FillEllipse(new SolidBrush(Color.White), rectangle);
TextRenderer.DrawText(G, value.ToString(), new Font("Arial", 10, FontStyle.Bold), rectangle,
point2.color);
G.DrawEllipse(new Pen(point1.color), rectangle);
#endregion
}
private bool checkPointInPrim(TopGraphPoint point)
{
foreach (TopGraphPoint topGraphPoint in point_in_graph)
{
if (point==topGraphPoint) return true;
}
return false;
}
private bool addPointoLIst(TopGraphPoint point1,TopGraphPoint point2)
{
foreach (TopGraphPoint topGraphPoint in point_in_graph)
{
if(point1==topGraphPoint||point2==topGraphPoint||point1==point2) return false;
}
point_in_graph.Add(point1);
//point_in_graph.Add(point2);
return true;
}
/// <summary>
/// Tìm cây khung nhỏ nhất và vẽ
/// </summary>
/// <param name="pictureBox"></param>
public void PrimDraw()
{
#region Xử lý đồ thị vô hướng
if (this.GrapType == 0)
{
int curent_point=0;
List<int> backup_point=new List<int>();
int num_try = 0;
bool flag = false;
while (point_in_graph.Count < Points.Length-1)
{
if (num_try > Points.Length-1)
{
point_in_graph.Remove(Points[curent_point]);
curent_point = backup_point[backup_point.Count-1];
backup_point.Remove(backup_point[backup_point.Count - 1]);
rollback();
num_try = 0;
}
TopGraphPoint[] tmp = new TopGraphPoint[2];
tmp[0] = Points[curent_point];
tmp[1] = Points[getMin(curent_point)];
if (addPointoLIst(tmp[0], tmp[1]))
{
backup_point.Add(curent_point);
curent_point = getMin(curent_point);
couplePoint.Add(tmp);
}
if (backup_point.Count == 0)
{
if (flag&&curent_point<Points.Length-1)
{
//Đổi điểm xuất phát mới
curent_point++;
point_in_graph.Clear();
blackList.Clear();
couplePoint.Clear();
flag = false;
}
else
{
point_in_graph.Remove(point_in_graph[0]);
flag = true;
}
}
num_try++;
}
bool first = true;
foreach (var topGraphPointse in couplePoint)
{
if (first)
{
topGraphPointse[0].color=Color.Black;
topGraphPointse[0].Draw(pictureBox);
first = false;
}
this.connectPoint(topGraphPointse[0],topGraphPointse[1],Color.FromArgb(150,Color.Black));
Thread.Sleep(1000);
}
}
#endregion
#region Xử lý đồ thị có hướng (Chưa viết được)
else
{
int curent_point = 0;
List<int> backup_point = new List<int>();
int num_try = 0;
bool flag = false;
while (point_in_graph.Count < Points.Length - 1)
{
if (num_try > Points.Length - 1)
{
point_in_graph.Remove(Points[curent_point]);
curent_point = backup_point[backup_point.Count - 1];
backup_point.Remove(backup_point[backup_point.Count - 1]);
rollback();
num_try = 0;
}
TopGraphPoint[] tmp = new TopGraphPoint[2];
tmp[0] = Points[curent_point];
tmp[1] = Points[getMin(curent_point)];
if (addPointoLIst(tmp[0], tmp[1]))
{
backup_point.Add(curent_point);
curent_point = getMin(curent_point);
couplePoint.Add(tmp);
}
if (backup_point.Count == 0)
{
if (flag && curent_point < Points.Length - 1)
{
//Đổi điểm xuất phát mới
curent_point++;
point_in_graph.Clear();
blackList.Clear();
couplePoint.Clear();
flag = false;
}
else
{
point_in_graph.Remove(point_in_graph[0]);
flag = true;
}
}
num_try++;
}
bool first = true;
foreach (var topGraphPointse in couplePoint)
{
if (first)
{
topGraphPointse[0].color = Color.Black;
topGraphPointse[0].Draw(pictureBox);
first = false;
}
this.connectPoint(topGraphPointse[0], topGraphPointse[1], Color.FromArgb(150,Color.Black));
Thread.Sleep(1000);
}
}
#endregion
MessageBox.Show("Đã vẽ cây khung nhỏ nhất");
Thread.CurrentThread.Abort();
}