在用戶控制中繪製圖像

Question

我嘗試製作Connect Four遊戲，並遇到問題。我想要洗衣機秋天的動畫。這是我的代碼：

public class BoardA : UserControl 
{ 
    private static int xSize = 7, ySize = 6; 
    private int slotWidth, slotHeight; 
    private SlotState[,] states; 
    private int currentColumn; 
    private bool paintBoard; 

    public BoardA() 
    { 

     states = new SlotState[xSize, ySize]; 
     slotWidth = 70; 
     slotHeight = 70; 
     currentColumn = -1; 
     MouseMove += new MouseEventHandler(BoardA_MouseMove); 
     MouseLeave += new EventHandler(BoardA_MouseLeave); 
     Click += new EventHandler(BoardA_Click); 
     paintBoard = true; 
    } 

    void BoardA_Click(object sender, EventArgs e) 
    { 
     if (ColumnClick != null) 
      ColumnClick(this, new ColumnClickedEventArgs(currentColumn)); 
    } 

    void BoardA_MouseLeave(object sender, EventArgs e) 
    { 
     this.CreateGraphics().FillRectangle(new SolidBrush(Color.Transparent), currentColumn * slotWidth, 0, slotWidth, slotHeight); 
     currentColumn = -1; 
    } 

    void BoardA_MouseMove(object sender, MouseEventArgs e) 
    { 
     int newColumn = e.X/slotWidth; 
     if (newColumn != currentColumn) 
     { 
      Graphics g = this.CreateGraphics(); 
      g.FillRectangle(new SolidBrush(Color.Transparent), currentColumn * slotWidth, 0, slotWidth, slotHeight); 
      currentColumn = newColumn; 
      g.DrawImage(Resources.Down_arrow, currentColumn * slotWidth, 0, slotWidth, slotHeight); 
     } 
    } 



    #region functions paint 

    protected override void OnPaint(PaintEventArgs e) 
    { 
     base.OnPaint(e); 
     if (paintBoard) 
     { 
      for (int i = 0; i < xSize; i++) 
      { 
       for (int j = 0; j < ySize; j++) 
       { 
        DrawSlot(states[i, j], i, j); 
       } 
      } 
     } 
     e.Graphics.DrawImage(Resources.Down_arrow, currentColumn * slotWidth, 0, slotWidth, slotHeight); 

    } 

    public void UpdateGraphic() 
    { 
     RecreateHandle(); 
    } 

    protected override void OnPaintBackground(PaintEventArgs e) 
    { 
     base.OnPaintBackground(e); 
    } 
    protected override CreateParams CreateParams 
    { 
     get 
     { 
      CreateParams cp = base.CreateParams; 
      cp.ExStyle |= 0x02000000; 
      return cp; 
     } 
    } 

    #endregion 

    public SlotState this[int columnIndex, int rowIndex] 
    { 
     get 
     { 
      return states[columnIndex, rowIndex]; 
     } 
     set 
     { 
      states[columnIndex, rowIndex] = value; 
      DrawSlot(value, columnIndex, rowIndex); 
     } 
    } 

    public Size BoardSize 
    { 
     get { return new Size(slotWidth, slotHeight); } 
    } 

    public event ColumnClickedEventHandler ColumnClick; 

    public bool IsFull 
    { 
     get 
     { 
      foreach (var item in states) 
      { 
       if (item == SlotState.Empty) 
        return false; 
      } 
      return true; 
     } 
    } 

    public void Clear() 
    { 
     for (int i = 0; i < xSize; i++) 
     { 
      for (int j = 0; j < ySize; j++) 
      { 
       this[i, j] = SlotState.Empty; 
      } 
     } 
    } 

    public bool EnterToColumn(int Column, SlotState state) 
    { 
     if (Column < 0 || Column >= xSize) 
      throw new ArgumentOutOfRangeException("Column"); 
     if (state == SlotState.Empty) 
      return false; 
     Graphics g = this.CreateGraphics(); 
     for (int i = ySize - 1; i >= 0; i--) 
     { 
      if (this[Column, i] == SlotState.Empty) 
      { 
       for (int j = 0; j < ySize - 1; j++) 
       { 
        for (int k = 0; k < slotHeight; k++) 
        { 
         g.DrawImage(Resources.RealRed_Slot, Column * slotWidth, (j + 1) * slotHeight + k, slotWidth, slotHeight); // Not working !!!!! 
         g.DrawImage(Resources.RealEmpty_Slot, Column * slotWidth, (j + 1) * slotHeight, slotWidth, slotHeight); // Not working !!!!! 
         g.DrawImage(Resources.RealEmpty_Slot, Column * slotWidth, (j + 2) * slotHeight, slotWidth, slotHeight); // Not working !!!!! 

         System.Threading.Thread.Sleep(5); 
        } 
       } 
       this[Column, i] = state; 
       return true; 
      } 
     } 
     return false; 
    } 

    public bool PopTopOfColumn(int Column) 
    { 
     if (Column < 0 || Column >= xSize) 
      throw new ArgumentOutOfRangeException("Column"); 
     for (int i = ySize - 1; i >= 0; i--) 
     { 
      if (this[Column, i] != SlotState.Empty) 
      { 
       this[Column, i] = SlotState.Empty; 
       return true; 
      } 
     } 
     return false; 
    } 


    private void DrawSlot(SlotState state, int columnIndex, int rowIndex) 
    { 
     Graphics g = this.CreateGraphics(); 
     switch (state) 
     { 
      case SlotState.Empty: 
       g.DrawImage(Resources.RealEmpty_Slot, columnIndex * slotWidth, (rowIndex + 1) * slotHeight, slotWidth, slotHeight); 
       break; 
      case SlotState.Red: 
       g.DrawImage(Resources.Red_Slot, columnIndex * slotWidth, (rowIndex + 1) * slotHeight, slotWidth, slotHeight); 
       break; 
      case SlotState.Orange: 
       g.DrawImage(Resources.Orange_Slot, columnIndex * slotWidth, (rowIndex + 1) * slotHeight, slotWidth, slotHeight); 
       break; 
      default: 
       break; 
     } 
    } 
} 

And ... does not working。我必須做什麼？ 如果我在繪畫中這樣做並刷新它閃爍。

Answer 1

您需要在Paint處理程序中繪製的所有內容;否則，它將在下一次重繪時擦除。

爲防止閃爍，請將DoubledBuffered設置爲true。