WINFORM窗体界面设计技巧-不规则、可改变大小、边框半透明效果.doc

网上也看过很多做.NET窗体的例子，我只是把网上的这些东西综合了一下，主要有下面这些特点：1、边框是半透明的，透明度可根据需要自己更改；2、可以改变窗体的大小，改变后样式不变；3、窗体的边框是不规则的；4、重点解决了窗体会出现闪烁的问题，在窗体移动的时候也不会闪烁；5、使用方便，只要将AlphaFormPanel拖动到一般的窗体上就可以实现换肤；设计思路说明：一、.NET下处理一个窗体部分透明我所知道的有两种方法： 1、用一张支持Alhpa通道的图片来处理半透明，这种方式处理出来的效果会很好，甚至可以用一张动态的图片来做背景。相信有人看过那个游动的鱼的程序，鱼的边缘是半透明的，就是用这种方式做的。这种方式整个窗体都是通过UpdateLayeredWindow画出来的，如果要在上面加控件的话，所有的控件都要自己来绘制，显然在具体的项目中用这种方式的话会大大增加开发的难度。有兴趣的人可以看看这个程序：/Files/liutao409/游动的鱼.rar关键的代码就是根据这种支持Alhpa通道的图片来绘制窗体DllImport(user32.dll, ExactSpelling = true, SetLastError = true)public static extern int UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize,IntPtr hdcSrc, ref Point pptSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);public void SetBits(Bitmap bitmap)if (!haveHandle) return;if(!Bitmap.IsCanonicalPixelFormat(bitmap.PixelFormat)| !Bitmap.IsAlphaPixelFormat(bitmap.PixelFormat) throw new ApplicationException(图片必须是32位带Alhpa通道的图片。);IntPtr oldBits = IntPtr.Zero;IntPtr screenDC = Win32.GetDC(IntPtr.Zero);IntPtr hBitmap = IntPtr.Zero;IntPtr memDc = Win32.CreateCompatibleDC(screenDC);tryWin32.Point topLoc = new Win32.Point(Left, Top);Win32.Size bitMapSize = new Win32.Size(bitmap.Width, bitmap.Height);Win32.BLENDFUNCTION blendFunc = new Win32.BLENDFUNCTION(); Win32.Point srcLoc = new Win32.Point(0, 0);hBitmap = bitmap.GetHbitmap(Color.FromArgb(0);oldBits = Win32.SelectObject(memDc, hBitmap);blendFunc.BlendOp = Win32.AC_SRC_OVER;blendFunc.SourceConstantAlpha = 255;blendFunc.AlphaFormat = Win32.AC_SRC_ALPHA;blendFunc.BlendFlags = 0;Win32.UpdateLayeredWindow(Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc, 0, ref blendFunc, Win32.ULW_ALPHA); finally if (hBitmap != IntPtr.Zero) Win32.SelectObject(memDc, oldBits); Win32.DeleteObject(hBitmap); Win32.ReleaseDC(IntPtr.Zero, screenDC); Win32.DeleteDC(memDc); 2、用两个窗体来实现边框半透明后面的窗体用来做边框，前面的窗体放其他的控件，前面的窗体跟随后面的窗体移动和改变大小，这样就很容易的控制后面的窗体半透明显示。这种方式虽然麻烦一点，但是不用像第一种方式那样自己绘制所有的控件，所以还是可以在项目中使用的。我的这个例子用的就是这种方式实现的。二、窗体边框的处理我的窗体的边框是用图片来处理的，为了使窗体的边框在改变大小后的样式不改变，上下边框做成了3段式的，中间部分平铺，两端保持不变这样窗体任意缩放后样式都不会改变。如果对GDI+熟悉的话，也可以不用图片来处理，直接绘制渐变填充也可以。我重写的承载图片的PictureBox，让PictureBox将所有的消息都传给父窗体来处理，这样就可以由父窗体统一的处理窗体的缩放和移动了，具体的代码如下：public partial class PictureBoxEX : PictureBox public delegate void delSetFormSize(int intInfo); public event delSetFormSize evtSetFormSize; #region 属性 private bool _bTopLeft = false; public bool BTopLeft get return _bTopLeft; set _bTopLeft = value; private bool _bTop = false; public bool BTop get return _bTop; set _bTop = value; private bool _bTopRight = false; public bool BTopRight get return _bTopRight; set _bTopRight = value; private bool _bLeft = false; public bool BLeft get return _bLeft; set _bLeft = value; private bool _bBottomLeft = false; public bool BBottomLeft get return _bBottomLeft; set _bBottomLeft = value; private bool _bBottom = false; public bool BBottom get return _bBottom; set _bBottom = value; private bool _bRight = false; public bool BRight get return _bRight; set _bRight = value; private bool _bBottomRight = false; public bool BBottomRight get return _bBottomRight; set _bBottomRight = value; #endregion #region 构造函数 / / 构造函数 / public PictureBoxEX() ; #endregion #region 重新鼠标消息 const int WM_NCHITTEST = 0x0084; const int HTTRANSPARENT = -1; const int HTLEFT = 10; const int HTRIGHT = 11; const int HTTOP = 12; const int HTTOPLEFT = 13; const int HTTOPRIGHT = 14; const int HTBOTTOM = 15; const int HTBOTTOMLEFT = 0x10; const int HTBOTTOMRIGHT = 17; protected override void WndProc(ref Message m) base.WndProc(ref m); switch (m.Msg) case WM_NCHITTEST: Point vPoint = new Point(int)m.LParam & 0xFFFF, (int)m.LParam 16 & 0xFFFF); vPoint = PointToClient(vPoint); int intInfo = -1; if (_bTopLeft) if (vPoint.X = ClientSize.Width - 10) intInfo = HTTOPRIGHT; else if (_bTop) if (vPoint.Y = 5) m.Result = (IntPtr)HTTOP; intInfo = HTTOP; if (evtSetFormSize != null & intInfo != -1) evtSetFormSize(intInfo); /将消息传给父窗体来处理 m.Result = (IntPtr)HTTRANSPARENT; break; #endregion 关键代码说明：一、用到的消息 private const int WM_NCLBUTTONDBLCLK = 0x00A3; private int _intInfo = -1; /消息回传值 private const int HTLEFT = 10; private const int HTRIGHT = 11; private const int HTTOP = 12; private const int HTTOPLEFT = 13; private const int HTTOPRIGHT = 14; private const int HTBOTTOM = 15; private const int HTBOTTOMLEFT = 0x10; private const int HTBOTTOMRIGHT = 17; private const int WM_NCHITTEST = 0x84; private const int HTCLIENT = 0x01; private const int HTCAPTION = 0x02;1、改变窗体大小和移动窗体的位置 所有的和边框有关的消息都传到后面的窗体的处理，承载边框的PictureBoxEx 会将传给它的系统消息忽略掉 protected override void WndProc(ref Message m) if (m.Msg = WM_NCHITTEST) this.DefWndProc(ref m);/移动窗体位置 if (m.Result.ToInt32() = HTCLIENT & this.WindowState != FormWindowState.Maximized) m.Result = new IntPtr(HTCAPTION); else base.WndProc(ref m); /改变窗体大小 if (ChangeFormSize & _intInfo != -1 & this.WindowState != FormWindowState.Maximized) m.Result = (IntPtr)_intInfo; _intInfo = -1; /双击鼠标左键的消息 else if (m.Msg = WM_NCLBUTTONDBLCLK) if (ChangeFormSize) /相当于单击一次最大化按钮 btnMax_MouseClick(null, EventArgs.Empty); else base.WndProc(ref m); 2、减少窗体闪烁 下面的是比较常见的减少窗体闪烁的方法 private void SetStyles() SetStyle( ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.SupportsTransparentBackColor, true); SetStyle(ControlStyles.Selectable, false); UpdateStyles(); 还可以设置窗体双缓存在减少闪烁 this.DoubleBuffered = true; 在窗体控件的创建过程中，如果控件过多的话，用下面这个函数来处理控件的创建也可以减少闪烁 public class AvoidControlFlicker private int _paintFrozen; public void FreezePainting(Control toFreezeControl, bool isToFreeze) if (null = toFreezeControl) throw new ArgumentNullException(toFreezeControl); if (isToFreeze & toFreezeControl.IsHandleCreated & toFreezeControl.Visible) if (0 = _paintFrozen+) NativeMethods.SendMessage(toFreezeControl.Handle, NativeConsts.WM_SETREDRAW, 0, 0); if (!isToFreeze) if (0 = _paintFrozen) return; if (0 = -_paintFrozen) NativeMethods.SendMessage(toFreezeControl.Handle, NativeConsts.WM_SETREDRAW, 1, 0); toFreezeControl.Invalidate(true); 3、为了给初学者提供一些帮助，其它一些处理函数也写出来 / / 窗体位置改变 / / / private void formStyle_LocationChanged(object sender, EventArgs e) if (PForm != null) /同时改变前面的子窗体的位置 CForm.Location = new Point(this.Location.X + pbLeft.Width, this.Location.Y + panelTop.Height); CForm.Update(); / / 关闭按钮单击事件 / / / private void btnExit_MouseClick(object sender, EventArgs e) this.Close(); /关闭窗体时要同时关闭窗体所在的父窗体 protected override void OnClosing(CancelEventA