Groupbox重绘问题

Question

我觉得我已经在互联网上寻找答案，但我仍然没有解决这个问题。 我正在用C＃构建一个hang子手游戏（我还是新来的），并且我在表单上绘制了不同的“body部分”。问题在于每次绘图事件被调用时都会重绘。所以我最终会得到一个头，然后只是一个胳膊，一条腿等

我试图做像重写OnPaintBackground这样的事情，虽然这解决了重绘的问题，它拧了起来整个形式，当我这样做时，它看起来很糟糕。 我也尝试绘制到一个面板而不是一个groupbox，但由于某种原因，我无法让它画出来。

任何人都可以提供任何建议吗？ 这不是作业顺便，只是一个个人项目和学习经验。

一些代码：这是我使用触发绘制函数（它会触发对我有其他条件）

this.groupBoxHang.Paint += new System.Windows.Forms.PaintEventHandler(this.groupBoxHangMan_Paint); 

然后说到这里，它调用实际的功能，这是什么一个单独的类

private void groupBoxHangMan_Paint(object sender, PaintEventArgs e) 
    {   
     draw.DrawHangMan(e.Graphics, GetRemainingGuess());  
    } 

下面是其他类的一部分：

public void DrawHangMan(Graphics dM, int guessesRemaining) 
    {   
     Pen blackPen = new Pen(Brushes.Black); 

     Pen deathPen = new Pen(Brushes.Red); 
     deathPen.Width = 2.0F; 

     if (guessesRemaining == 7) 
     { 
      dM.DrawEllipse(blackPen, 94, 75, 60, 60);//head 
     } 
     else if (guessesRemaining == 6) 
     { 
      dM.DrawLine(blackPen, 124, 210, 124, 135);//body 
     } 
     else if (guessesRemaining == 5) 
     { 
      dM.DrawLine(blackPen, 123, 170, 65, 145);//left arm 
     } 
     else if (guessesRemaining == 4) 
     { 
      dM.DrawLine(blackPen, 123, 170, 181, 145); //right arm 
     } 
     else if (guessesRemaining == 3) 
     { 
      dM.DrawLine(blackPen, 123, 210, 65, 255);//left leg 
     } 
     else if (guessesRemaining == 2) 
     { 
      dM.DrawLine(blackPen, 123, 210, 181, 255);//right leg 
     } 
     else if (guessesRemaining == 1) 
     { 
      dM.DrawEllipse(blackPen, 105, 93, 10, 10); //left open eye 
      dM.DrawEllipse(blackPen, 133, 93, 10, 10); //right open eye 
     } 
     else if (guessesRemaining == 0) 
     { 
      dM.DrawLine(deathPen, 102, 104, 118, 92);//left eye dead 
      dM.DrawLine(deathPen, 118, 104, 102, 92); 

      dM.DrawLine(deathPen, 130, 104, 146, 92);//right dead eye 
      dM.DrawLine(deathPen, 146, 104, 130, 92); 
     }   

    } 

Answer 1

两件事用你的If语句。它们被设置为只在计数等于计数时激活，以便在计数小于阈值时不会重新绘制，第二件事是用其他语句只运行其中一个级别。在Paint事件中执行此操作是正确的。尝试这样的：

public void DrawHangMan(Graphics dM, int guessesRemaining) 
{ 
    Pen blackPen = new Pen(Brushes.Black); 
    Pen deathPen = new Pen(Brushes.Red); 
    deathPen.Width = 2.0F; 

    if (guessesRemaining < 8) 
    { 
     dM.DrawEllipse(blackPen, 94, 75, 60, 60);//head 
    } 
    if (guessesRemaining < 7) 
    { 
     dM.DrawLine(blackPen, 124, 210, 124, 135);//body 
    } 
    if (guessesRemaining < 6) 
    { 
     dM.DrawLine(blackPen, 123, 170, 65, 145);//left arm 
    } 
    if (guessesRemaining < 5) 
    { 
     dM.DrawLine(blackPen, 123, 170, 181, 145); //right arm 
    } 
    if (guessesRemaining < 4) 
    { 
     dM.DrawLine(blackPen, 123, 210, 65, 255);//left leg 
    } 
    if (guessesRemaining < 3) 
    { 
     dM.DrawLine(blackPen, 123, 210, 181, 255);//right leg 
    } 
    if (guessesRemaining < 2) 
    { 
     dM.DrawEllipse(blackPen, 105, 93, 10, 10); //left open eye 
     dM.DrawEllipse(blackPen, 133, 93, 10, 10); //right open eye 
    } 
    if (guessesRemaining < 1) 
    { 
     dM.DrawLine(deathPen, 102, 104, 118, 92);//left eye dead 
     dM.DrawLine(deathPen, 118, 104, 102, 92); 
     dM.DrawLine(deathPen, 130, 104, 146, 92);//right dead eye 
     dM.DrawLine(deathPen, 146, 104, 130, 92); 
    } 

}