Question

我已经解决了大部分代码并且有几个游戏类。我现在坚持一点，它是如何绘制实际的Connect 4网格。谁能告诉我这个for循环有什么问题？我没有错误，但网格没有出现。我正在使用C＃。

private void Drawgrid() 
{
    Brush b = Brushes.Black;
    Pen p = Pens.Black;
    for (int xCoor = XStart, col = 0; xCoor < XStart + ColMax * DiscSpace; xCoor += DiscSpace, col++)
    {
        // x coordinate beginning; while the x coordinate is smaller than the max column size, times it by
        // the space between each disc and then add the x coord to the disc space in order to create a new circle.
        for (int yCoor = YStart, row = RowMax - 1; yCoor < YStart + RowMax * DiscScale; yCoor += DiscScale, row--)
        {
            switch (Grid.State[row, col])
            {
                case GameGrid.Gridvalues.Red:
                    b = Brushes.Red;
                    break;
                case GameGrid.Gridvalues.Yellow:
                    b = Brushes.Yellow;
                    break;
                case GameGrid.Gridvalues.None:
                    b = Brushes.Aqua;
                    break;
            }
        }
        MainDisplay.DrawEllipse(p, xCoor, yCoor, 50, 50);
        MainDisplay.FillEllipse(b, xCoor, yCoor, 50, 50);
    }
    Invalidate();
}

Answer 1

当窗口重绘时，需要执行Drawgrid()中的代码。

Invalidate()调用告诉应用程序它需要重绘窗口内容（它会触发重绘窗口）。此代码（Invalidate()调用除外）应该在您重写的OnPaint()方法中，否则此代码绘制的任何内容都将被OnPaint()中的默认绘图代码立即覆盖（当您进行Invalidate()调用时，默认情况下可能会绘制白色背景。

protected override void OnPaint(PaintEventArgs e)
{
    Graphics g = e.Graphics;

    // (your painting code here...)
}

连接4 C＃（如何绘制网格）

1 个答案: