漂亮的玻璃透明按钮控件CSharp源码

namespace GlassButton{ #region 控件状态 /// <summary> /// 控件状态 /// </summary> public enum State { /// <summary> /// 无 /// </summary> Normal = 0, /// <summary> /// 获得焦点 /// </summary> Focused = 1, /// <summary> /// 失去焦点 /// </summary> LostFocused = 2, /// <summary> /// 鼠标指针进入控件 /// </summary> MouseEnter = 3 } #endregion public class GlassButton : Control { #region 私有变量 private int bmp_Left; private const int bmp_Top = 5; private const int bmp_Size = 45; private bool _focused = false; private State state = State.Normal; private Bitmap _bmp = null; #endregion #region 构造函数 public GlassButton() { SetStyle(ControlStyles.DoubleBuffer, true); //双缓冲防止重绘时闪烁 SetStyle(ControlStyles.AllPaintingInWmPaint, true); //忽略 WM_ERASEBKGND 窗口消息减少闪烁 SetStyle(ControlStyles.UserPaint, true); //自定义绘制控件内容 SetStyle(ControlStyles.SupportsTransparentBackColor, true); //模拟透明 SetStyle(ControlStyles.Selectable, true); //接收焦点 Size = new Size(73, 81); //初始大小 Font = new Font("微软雅黑", 9); //控件字体 } #endregion #region 属性 /// <summary> /// 获取或设置控件显示的图片 /// </summary> [Description("获取或设置控件显示的图标")] public Bitmap Bitmap { get { return _bmp; } set { _bmp = value; Invalidate(false); } } /// <summary> /// 重写控件焦点属性 /// </summary> [Description("重写控件焦点属性")] public new bool Focused { get { return _focused; } set { _focused = value; if (_focused) state = State.Focused; else state = State.LostFocused; Invalidate(false); } } #endregion #region 重载事件 //自定义绘制 protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); Graphics g = e.Graphics; g.SmoothingMode = SmoothingMode.HighQuality; g.PixelOffsetMode = PixelOffsetMode.HighQuality; switch (state) { case State.Focused: { DrawSelected(g); break; } case State.MouseEnter: { if (!Focused) g.DrawImage(Properties.Resources.enter, ClientRectangle); else DrawSelected(g); break; } } DrawImage(g); DrawText(g); } //焦点进入 protected override void OnEnter(EventArgs e) { base.OnEnter(e); Focused = true; } //失去焦点 protected override void OnLeave(EventArgs e) { base.OnLeave(e); Focused = false; } //禁止调整大小 protected override void OnResize(EventArgs e) { Width = 73; Height = 81; } protected override void OnMouseEnter(EventArgs e) { base.OnMouseEnter(e); state = State.MouseEnter; Invalidate(false); } protected override void OnMouseLeave(EventArgs e) { base.OnMouseLeave(e); if (!Focused) { state = State.LostFocused; Invalidate(false); } } //只响应单击鼠标左键事件 protected override void OnClick(EventArgs e) { MouseEventArgs m = (MouseEventArgs)e; if (m.Button == MouseButtons.Left) { base.OnClick(e); Focus(); } } #endregion #region 方法 #region Draw void DrawSelected(Graphics g) { g.DrawImage(Properties.Resources.down, ClientRectangle); } void DrawImage(Graphics g) { if (_bmp != null) { Bitmap bmp = ScaleZoom(_bmp); bmp_Left = (Width - bmp.Width) / 2; g.DrawImage(bmp, new Rectangle(bmp_Left, bmp_Top, bmp.Width, bmp.Height)); } } void DrawText(Graphics g) { SizeF size = g.MeasureString(Text, Font); g.DrawString(Text, Font, new SolidBrush(ForeColor), (Width - size.Width) / 2, 58); } #endregion #region 按比例缩放图片 public Bitmap ScaleZoom(Bitmap bmp) { if (bmp != null) { double zoomScale; if (bmp.Width > bmp_Size || bmp.Height > bmp_Size) { double imageScale = (double)bmp.Width / (double)bmp.Height; double thisScale = 1; if (imageScale > thisScale) { zoomScale = (double)bmp_Size / (double)bmp.Width; return BitMapZoom(bmp, bmp_Size, (int)(bmp.Height * zoomScale)); } else { zoomScale = (double)bmp_Size / (double)bmp.Height; return BitMapZoom(bmp, (int)(bmp.Width * zoomScale), bmp_Size); } } } return bmp; } #endregion #region 缩放BitMap /// <summary> /// 图片缩放 /// </summary> /// <param name="bmpSource">源图片</param> /// <param name="bmpSize">缩放图片的大小</param> /// <returns>缩放的图片</returns> public Bitmap BitMapZoom(Bitmap bmpSource, int bmpWidth, int bmpHeight) { Bitmap bmp, zoomBmp; try { bmp = new Bitmap(bmpSource); zoomBmp = new Bitmap(bmpWidth, bmpHeight); Graphics gh = Graphics.FromImage(zoomBmp); gh.InterpolationMode = InterpolationMode.HighQualityBicubic; gh.DrawImage(bmp, new Rectangle(0, 0, bmpWidth, bmpHeight), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel); gh.Dispose(); return zoomBmp; } catch { } finally { bmp = null; zoomBmp = null; GC.Collect(); } return null; } #endregion #endregion }}