private void DrawPartitionArea()
{
GDB p = new GDB(ptbGrid.Width, ptbGrid.Height);
Graphics g = p.Store();
g.Clear(ptbGrid.BackColor);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
if (tree.Root != null)
{
tree.DrawPartitionArea(tree.Root, g, ptbGrid.Width, ptbGrid.Height);
if (tree.IsRangeSearch == true)
{
//Lấy giá trị tọa độ lớn nhất hiện tại trên cây
double maxCoordinate = tree.GetXValMax(tree.Root);
if (maxCoordinate < tree.GetYValMax(tree.Root))
{
maxCoordinate = tree.GetYValMax(tree.Root);
}
double xScale = (ptbGrid.Width - (ptbGrid.Width - (ptbGrid.Height - 20))) / maxCoordinate; //Bằng ptbGrid.Height - 20
double yScale = (ptbGrid.Height - 20) / maxCoordinate;
Point realCentre = new Point(Convert.ToInt32(centre.X * xScale), Convert.ToInt32(centre.Y * yScale));
//Ước lượng tỷ lệ tương đối cho realRadius (Không chính xác lắm)
int realRadius = Convert.ToInt32(radius * ((xScale + yScale) / 2));
Pen myPen = new Pen(Color.Green, 2);
Brush myBrush = new SolidBrush(Color.Green);
g.DrawEllipse(myPen, realCentre.X - realRadius, ptbGrid.Height - realCentre.Y - realRadius, realRadius * 2, realRadius * 2);
g.FillEllipse(myBrush, realCentre.X - 5, ptbGrid.Height - realCentre.Y - 5, 10, 10);
g.DrawLine(myPen, realCentre.X, ptbGrid.Height - realCentre.Y, realCentre.X + realRadius, ptbGrid.Height - realCentre.Y);
g.DrawString(String.Format("O({0}, {1})", centre.X, centre.Y), new Font("Arial", 8), myBrush, realCentre.X - 30, ptbGrid.Height - realCentre.Y + 5);
g.DrawString(String.Format("R={0}", radius), new Font("Arial", 8), myBrush, (realCentre.X + realCentre.X + realRadius) / 2 - 15, ptbGrid.Height - realCentre.Y - 14);
}
p.Paint(ptbGrid);
p.Dispone();
}
}
//Vẽ lại cây trong 2 PictureBox (chưa hoạt động được với ptbTree)
private void ReDrawTree()
{
if (ptbTree.Width != 0 && ptbTree.Height != 0 && ptbGrid.Width != 0 && ptbGrid.Height != 0)
{
GDB p = new GDB(ptbTree.Width, ptbTree.Height);
Graphics g = p.Store();
g.Clear(ptbTree.BackColor);
DrawTree(g, tree, XPIXEL, YPIXEL, doDoiX, doDoiY);
p.Paint(ptbTree);
p.Dispone();
DrawPartitionArea();
//ptbTree.Invalidate();
this.Invalidate();
}
}
private void ptbTree_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
Point diemHT = new Point(e.X, e.Y);
doDoiXHT = doDoiX + (diemHT.X - diemBD.X);
doDoiYHT = doDoiY + (diemHT.Y - diemBD.Y);
GDB p = new GDB(ptbTree.Width, ptbTree.Height);
Graphics g = p.Store();
g.Clear(ptbTree.BackColor);
DrawTree(g, tree, XPIXEL, YPIXEL, doDoiXHT, doDoiYHT);
p.Paint(ptbTree);
p.Dispone();
}
}