画线 [英] drawing string

问题描述

我有一个小程序
如你所见
眨眼太多
感谢您对此程序的任何帮助，因此它不会闪烁

i have a small program
like you can see
it blinks too much
thanks for any help for this program so it will not blink

using System;
using System.Drawing;
using System.Windows.Forms;

namespace FlowOutString
{
    public partial class frmFlow : Form
    {
        string FineString = " ";
        Graphics g;
        PointF thispoint;
        Font thisFont = new Font("Times New Roman", 100);
        SolidBrush thisbrush = new SolidBrush(Color.Red);

        public frmFlow()
        {
            InitializeComponent();
        }

        private void frmFlow_Load(object sender, EventArgs e)
        {
            g = this.CreateGraphics();
            timer1.Start();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            FineString = "(-: Smile :-)";
            timer1.Interval = 25;
            g.Clear(BackColor);
            g.DrawString(FineString, thisFont, thisbrush, getPoint());
        }
        protected PointF getPoint()
        {
            thispoint.X -= 5;

            if (thispoint.X <= 0)
            {
                thispoint.X = this.Width;
            }
            thispoint.Y = 180;
            return thispoint;
        }
    }
}

推荐答案

写道:​​

g = this.CreateGraphics();

g = this.CreateGraphics();

这是错误的代码.不要这样改为处理绘画事件

This is bad code. Don''t do it. Handle the paint event instead

写道:​​

g.Clear(BackColor);

g.Clear(BackColor);

这将擦除文本，这意味着它将绘制一个空白区域.因此，它会闪烁.

如果您处理绘画事件并在计时器中调用Invalidate()来触发它，则将有所帮助.您也可以打开双重缓冲.

this.SetStyle(

ControlStyles.AllPaintingInWmPaint |

ControlStyles.UserPaint |

ControlStyles.DoubleBuffer，true);


会做到的.

不确定该代码如何与CreateGraphics的糟糕用法一起使用，因此请首先解决该问题.

This wipes the text, which means that it draws a blank area. Therefore, it flickers.

If you handle the paint event and call Invalidate() in your timer to fire it, that will help. You can also turn on double buffering.

this.SetStyle(

ControlStyles.AllPaintingInWmPaint |

ControlStyles.UserPaint |

ControlStyles.DoubleBuffer,true);


Will do that.

Not sure how this code will play with the awful use of CreateGraphics, so fix that first.

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