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  • 转:不规则按钮实现

    按钮控件在windows forms总是我们使用最多的控件之一了,可是你真的了解它吗?除了修改它的text属性以及该name的名字和增加事件处理的代码你还了解其他吗?

    假如有这样一个需求,我们要做一个不规则的按钮,我们该具体如何实现呢?

    好吧,别的先不多说了,我直接上实例代码。

    using System; using System.Drawing; 
    using System.Drawing.Drawing2D; 
    using System.Windows.Forms;
    namespace Borwer
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            /// <summary>         
            /// 返回指定图片中的非透明区域;         
            /// </summary>         
            /// <param name="img">位图</param>         
            /// <param name="alpha">alpha 小于等于该值的为透明</param>         
            /// <returns></returns>         
            public static GraphicsPath GetNoneTransparentRegion(Bitmap img, byte alpha)
            {
                int height = img.Height;
                int width = img.Width;
                int xStart, xEnd;
                GraphicsPath grpPath = new GraphicsPath();
                for (int y = 0; y < height; y++)
                {
                    //逐行扫描
                    for (int x = 0; x < width; x++)
                    {
                        //略过连续透明的部分
                        while (x < width && img.GetPixel(x, y).A <= alpha)
                        {
                            x++;
                        }
                        //不透明部分
                        xStart = x;
                        while (x < width && img.GetPixel(x, y).A > alpha)
                        {
                            x++;
                        }
                        xEnd = x;
                        if (img.GetPixel(x - 1, y).A > alpha)
                        {
                            grpPath.AddRectangle(new Rectangle(xStart, y, xEnd - xStart, 1));
                        }
                    }
                }
                return grpPath;
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                pictbox.Visible = false;
            }
    
            private void button1_Paint(object sender, PaintEventArgs e)
            {
                Bitmap img = (Bitmap)pictbox.Image;
                GraphicsPath grapth = GetNoneTransparentRegion(img, 10);
                button1.Region = new Region(grapth);
                //要显示的图片设置为窗体背景;            
                button1.BackgroundImage = pictbox.Image;
                button1.BackgroundImageLayout = ImageLayout.Zoom;
                //在修改窗体尺寸之前设置窗体为无边框样式;            
                button1.Width = pictbox.Image.Width;
                button1.Height = pictbox.Image.Height;
            }
    
            private void button1_Click(object sender, System.EventArgs e)
            {
                MessageBox.Show("我是心状不规则按钮");
            }
    
            private void button2_Click(object sender, System.EventArgs e)
            {
                MessageBox.Show("我是苹果不规则按钮");
            }
    
            private void button2_Paint(object sender, PaintEventArgs e)
            {
                Bitmap img = (Bitmap)pictbox.Image;
                GraphicsPath grapth = GetNoneTransparentRegion(img, 10);
                button2.Region = new Region(grapth);
                //要显示的图片设置为窗体背景;            
                button2.BackgroundImage = pictbox.Image;
                button2.BackgroundImageLayout = ImageLayout.Zoom;
                //在修改窗体尺寸之前设置窗体为无边框样式;           
                button2.Width = pictbox.Image.Width;
    
                button2.Height = pictbox.Image.Height;
            }
        }
    }

    运行结果:

    不规则按钮效果

    上面的弹出框是点击心状按钮的回应,怎么样效果实现了吧,你可以选择一些更多的图片去玩玩看看,很爽的效果。

     除非注明,木杉博客文章均为原创并采用BY-NC-SA协议进行授权原创文章,转载请注明: 转载自木杉博客

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  • 原文地址:https://www.cnblogs.com/lusunqing/p/3449610.html
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