c# - XNA - 如何改变绘制字符串列表的方向

Question

您如何使用 spritebatch 绘制字符串列表，使其看起来像这样；

Item1 Item2
Item3 Item4

代替项目 1 项目 2 项目 3 项目 4 或代替：

Item1
Item2
Item3
Item4

Answer 1

这样的事情会让以后更容易改变：

int y = startPointY;
int x = startPointX;
int switchAt = items.Count/2; //<--- or where ever you might want to break up the strings
int max = 0;

for(int i = 0; i < items.Count; i++)
{
    spriteBatch.DrawString(font, items[i], new Vector2(x, y), Color);

    if(max < spriteFont.MeasureString(items[i]))
    {
        //this is to make sure the next column of strings are aligned
        max = spriteFont.MeasureString(items[i]);
    }

    y += someYSpace;

    if(i == switchAt)
    {
         x += max + someXSpace;//someXSpace not neccessary
         y = startPointY;         
    }         
}

现在，您可以猜测将字符串居中的大致位置......或者，您可以找到并排的字符串的长度，测量它们之间的总空间量，以及其他一些棘手的问题弄清楚哪些字符串应该放在哪里......换句话说，据我所知，让它们完全居中会很痛苦，而且可能比它的价值要麻烦得多。

您重构的代码：

        Color color;
        int linePadding = 3;
        int switchAt = buttonList.Count / 2 - 1;//minus one because the list starts at 0, and goes up to 3, so 1 is the switch point


        else
        {
            spriteBatch.Draw(mMenuPhoto, new Rectangle(800, 150, mMenuPhoto.Width, mMenuPhoto.Height), Color.White);  
            float X = 210;
            float Y = 600 - (spriteFont.LineSpacing * (buttonList.Count) / 2) + ((spriteFont.LineSpacing + linePadding));
            float max = 0;
            float linesXSpace = 30;//to seperate this lines to make room for '|'

            for (int i = 0; i < buttonList.Count; i++)
            {
                color = (i == selected) ? Color.LightGray : Color.DarkSlateGray;
                if (max < spriteFont.MeasureString(buttonList[i]).X)
                {
                    max = spriteFont.MeasureString(buttonList[i]).X;
                }

                if (i != selected)
                {
                    spriteBatch.DrawString(spriteFont, buttonList[i], new Vector2(X, Y), color);
                    Y += spriteFont.MeasureString(buttonList[i]).Y;    
                    if (i == switchAt)
                    {
                        X += max + linesXSpace;
                        Y = 600 - (spriteFont.LineSpacing * (buttonList.Count) / 2) + ((spriteFont.LineSpacing + linePadding));
                    }                       

                }
                else
                {     
                    spriteBatch.DrawString(spriteFont, buttonList[i], new Vector2(X, Y), color);
                    spriteBatch.DrawString(spriteFont2, "|", new Vector2(X - 20, Y), Color.DarkGreen);
                    Y += spriteFont.MeasureString(buttonList[i]).Y;   
                    if (i == switchAt)
                    {
                        X += max + linesXSpace;
                        Y = 600 - (spriteFont.LineSpacing * (buttonList.Count) / 2) + ((spriteFont.LineSpacing + linePadding) * i);
                    }                                             
                }
            }
        }

PS我喜欢它到目前为止的样子^^。