詳解C#創(chuàng)建不規(guī)則窗體的幾種方式
現(xiàn)在,C#創(chuàng)建不規(guī)則窗體不是一件難事,下面總結(jié)一下:
一、自定義窗體
一般為規(guī)則的圖形,如圓、橢圓等。
做法:重寫Form1_Paint事件(Form1是窗體的名字),最簡單的一種情況如下:
- System.Drawing.Drawing2D.GraphicsPath shape = new System.Drawing.Drawing2D.GraphicsPath();
 - shape.AddEllipse(0,0,this.Height, this.Width);
 - this.Region = new Region(shape);
 
即重繪窗體的規(guī)則。
二、利用背景圖片實(shí)現(xiàn)
1. 設(shè)置窗體的背景圖片,其中背景圖片是24位(不包括24)以下的位圖(BMP圖片),并且要設(shè)置TansparencyKey的值,一般為你背景圖片的背景色,即創(chuàng)建不規(guī)則圖片時(shí)的底色,一般設(shè)為你圖片中沒有的顏色。
這種做法的不好的地方就是背景圖片一定要16位或者更低的,而且還要確??蛻舳说娘@示。如果監(jiān)視器的顏色深度設(shè)置大于 24 位,則不管 TransparencyKey 屬性是如何設(shè)置的,窗體的非透明部分都會(huì)產(chǎn)生顯示問題。若要避免出現(xiàn)這種問題,請(qǐng)確保“顯示”控制面板中的監(jiān)視器顏色深度的設(shè)置小于 24 位。當(dāng)開發(fā)具有這種透明功能的應(yīng)用程序時(shí),請(qǐng)牢記應(yīng)使您的用戶意識(shí)到此問題。
實(shí)現(xiàn)步驟如下:
1. 新建windows application
2. 選擇窗體,找到BackgroundImage屬性,點(diǎn)擊打開新的窗口,選擇下面的導(dǎo)入資源文件,選擇你的不規(guī)則的BMP圖片
3. 找到窗體的TansparencyKey,將它設(shè)置為你背景圖片的背景色(如黃色)
4. 找到窗體的FormBorderStyle,將其設(shè)置為none,即不顯示標(biāo)題欄
5. 運(yùn)行
<!--[endif]-->
2. 跟背景圖片一樣的圖形,不過是動(dòng)態(tài)加載,遍歷位圖以實(shí)現(xiàn)不規(guī)則窗體。它的原理是這樣的,在Form的load事件中寫方法使得窗體的描繪區(qū)域發(fā)生改變。
實(shí)現(xiàn)步驟如下:
1. 建立winform應(yīng)用程序
2. 找到窗體的Load事件,雙擊進(jìn)行編輯
3. 編寫方法,主要的代碼如下:
- class BitmapRegion
 - {
 - public BitmapRegion()
 - { }
 - /// <summary>
 - /// Create and apply the region on the supplied control
 - /// 創(chuàng)建支持位圖區(qū)域的控件(目前有button和form)
 - /// </summary>
 - /// <param name="control">The Control object to apply the region to控件</param>
 - /// <param name="bitmap">The Bitmap object to create the region from位圖</param>
 - public static void CreateControlRegion(Control control, Bitmap bitmap)
 - {
 - // Return if control and bitmap are null
 - //判斷是否存在控件和位圖
 - if (control == null || bitmap == null)
 - return;
 - // Set our control''s size to be the same as the bitmap
 - //設(shè)置控件大小為位圖大小
 - control.Width = bitmap.Width;
 - control.Height = bitmap.Height;
 - // Check if we are dealing with Form here
 - //當(dāng)控件是form時(shí)
 - if (control is System.Windows.Forms.Form)
 - {
 - // Cast to a Form object
 - //強(qiáng)制轉(zhuǎn)換為FORM
 - Form form = (Form)control;
 - // Set our form''s size to be a little larger that the bitmap just
 - // in case the form''s border style is not set to none in the first place
 - //當(dāng)FORM的邊界FormBorderStyle不為NONE時(shí),應(yīng)將FORM的大小設(shè)置成比位圖大小稍大一點(diǎn)
 - form.Width = control.Width;
 - form.Height = control.Height;
 - // No border
 - //沒有邊界
 - form.FormBorderStyle = FormBorderStyle.None;
 - // Set bitmap as the background image
 - //將位圖設(shè)置成窗體背景圖片
 - form.BackgroundImage = bitmap;
 - // Calculate the graphics path based on the bitmap supplied
 - //計(jì)算位圖中不透明部分的邊界
 - GraphicsPath graphicsPath = CalculateControlGraphicsPath(bitmap);
 - // Apply new region
 - //應(yīng)用新的區(qū)域
 - form.Region = new Region(graphicsPath);
 - }
 - // Check if we are dealing with Button here
 - //當(dāng)控件是button時(shí)
 - else if (control is System.Windows.Forms.Button)
 - {
 - // Cast to a button object
 - //強(qiáng)制轉(zhuǎn)換為 button
 - Button button = (Button)control;
 - // Do not show button text
 - //不顯示button text
 - button.Text = "";
 - // Change cursor to hand when over button
 - //改變 cursor的style
 - button.Cursor = Cursors.Hand;
 - // Set background image of button
 - //設(shè)置button的背景圖片
 - button.BackgroundImage = bitmap;
 - // Calculate the graphics path based on the bitmap supplied
 - //計(jì)算位圖中不透明部分的邊界
 - GraphicsPath graphicsPath = CalculateControlGraphicsPath(bitmap);
 - // Apply new region
 - //應(yīng)用新的區(qū)域
 - button.Region = new Region(graphicsPath);
 - }
 - }
 - /// <summary>
 - /// Calculate the graphics path that representing the figure in the bitmap
 - /// excluding the transparent color which is the top left pixel.
 - /// //計(jì)算位圖中不透明部分的邊界
 - /// </summary>
 - /// <param name="bitmap">The Bitmap object to calculate our graphics path from</param>
 - /// <returns>Calculated graphics path</returns>
 - private static GraphicsPath CalculateControlGraphicsPath(Bitmap bitmap)
 - {
 - // Create GraphicsPath for our bitmap calculation
 - //創(chuàng)建 GraphicsPath
 - GraphicsPath graphicsPath = new GraphicsPath();
 - // Use the top left pixel as our transparent color
 - //使用左上角的一點(diǎn)的顏色作為我們透明色
 - Color colorTransparent = bitmap.GetPixel(0, 0);
 - // This is to store the column value where an opaque pixel is first found.
 - // This value will determine where we start scanning for trailing opaque pixels.
 - //第一個(gè)找到點(diǎn)的X
 - int colOpaquePixel = 0;
 - // Go through all rows (Y axis)
 - // 偏歷所有行(Y方向)
 - for (int row = 0; row < bitmap.Height; row++)
 - {
 - // Reset value
 - //重設(shè)
 - colOpaquePixel = 0;
 - // Go through all columns (X axis)
 - //偏歷所有列(X方向)
 - for (int col = 0; col < bitmap.Width; col++)
 - {
 - // If this is an opaque pixel, mark it and search for anymore trailing behind
 - //如果是不需要透明處理的點(diǎn)則標(biāo)記,然后繼續(xù)偏歷
 - if (bitmap.GetPixel(col, row) != colorTransparent)
 - {
 - // Opaque pixel found, mark current position
 - //記錄當(dāng)前
 - colOpaquePixel = col;
 - // Create another variable to set the current pixel position
 - //建立新變量來記錄當(dāng)前點(diǎn)
 - int colNext = col;
 - // Starting from current found opaque pixel, search for anymore opaque pixels
 - // trailing behind, until a transparent pixel is found or minimum width is reached
 - ///從找到的不透明點(diǎn)開始,繼續(xù)尋找不透明點(diǎn),一直到找到或則達(dá)到圖片寬度
 - for (colNext = colOpaquePixel; colNext < bitmap.Width; colNext++)
 - if (bitmap.GetPixel(colNext, row) == colorTransparent)
 - break;
 - // Form a rectangle for line of opaque pixels found and add it to our graphics path
 - //將不透明點(diǎn)加到graphics path
 - graphicsPath.AddRectangle(new Rectangle(colOpaquePixel, row, colNext - colOpaquePixel, 1));
 - // No need to scan the line of opaque pixels just found
 - col = colNext;
 - }
 - }
 - }
 - // Return calculated graphics path
 - return graphicsPath;
 - }
 - }
 
4. 運(yùn)行
<!--[endif]-->
三、調(diào)用類庫實(shí)現(xiàn)
主要就是根據(jù)一些坐標(biāo),然后根據(jù)這些坐標(biāo)繪制窗體
代碼如下:
- public Form3()
 - {
 - InitializeComponent();
 - //創(chuàng)建不規(guī)則窗體
 - POINTAPI[] poin;
 - poin = new POINTAPI[5];
 - poin[0].x = 90;
 - poin[0].y = 90;
 - poin[1].x = this.Width;
 - poin[1].y = 0;
 - poin[2].x = Width;
 - poin[2].y = this.Height / 2;
 - poin[3].x = Width / 2;
 - poin[3].y = Height / 2;
 - poin[4].x = 0;
 - poin[4].y = Width;
 - Boolean flag = true;
 - IntPtr hRgn = CreatePolygonRgn(ref poin[0], 8, 1);
 - SetWindowRgn(this.Handle, hRgn, ref flag);
 - this.BackColor = Color.BurlyWood;
 - }
 - [StructLayout(LayoutKind.Sequential)]
 - private struct POINTAPI
 - {
 - internal int x;
 - internal int y;
 - }
 - [DllImport("gdi32.dll")]
 - private static extern IntPtr CreatePolygonRgn(ref POINTAPI lpPoint,int nCount,int nPolyFillMode);
 - [DllImport("user32.dll")]
 - private static extern IntPtr SetWindowRgn(IntPtr hWnd,IntPtr hRgn, ref Boolean bRedraw);
 - //設(shè)置窗體顯示狀態(tài)
 - [DllImport("user32.dll")]
 - private static extern int SetWindowPos(IntPtr hwnd,int hWndInsertAfter,int x,int y,int cx,int cy,int wFlags);
 - private void Start_Btn_Click(object sender, EventArgs e)
 - {//始終顯示在前面
 - SetWindowPos(this.Handle, -1, 0, 0, 0, 0, 1);
 - }
 - private void button1_Click(object sender, EventArgs e)
 - {
 - //最小化始終顯示在前面
 - SetWindowPos(this.Handle, -1, 0, 0, 0, 0, 0);
 - }
 
當(dāng)然,我們也可以自定義窗體的動(dòng)作,如按著某個(gè)軌跡一定,下面的代碼中的BackgroundForm程序中就小試了一下,效果還不錯(cuò),下面是這些程序的效果圖(有點(diǎn)亂)和代碼:
 
 
代碼下載:http://files.cnblogs.com/alexis/IrregularForm.rar
代碼是.Net 2.0的,也可以轉(zhuǎn)換為其他版本的,只要運(yùn)行主程序即可。
以上的四種方法有利也有弊,希望大家提意見或者更好的解決方案。
原文標(biāo)題:C#創(chuàng)建不規(guī)則窗體的幾種方式
鏈接:http://www.cnblogs.com/alexis/archive/2010/08/29/1811826.html
【編輯推薦】
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