实例介绍
【实例简介】
【实例截图】
【核心代码】
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace 透明时钟 { public partial class Form1 : Form { //鼠标拖动相关变量 Point oldPoint = new Point(0, 0); bool mouseDown = false; //时钟样式元素,依次为:背景、时针、分针、秒针、转轴、表盖 private Image img1; private Image img2; private Image img3; private Image img4; private Image img5; private Image img6; public Form1() { InitializeComponent(); MouseDown = new MouseEventHandler(Form1_MouseDown); MouseUp = new MouseEventHandler(Form1_MouseUp); MouseMove = new MouseEventHandler(Form1_MouseMove); } void Form1_MouseMove(object sender, MouseEventArgs e) { if (mouseDown) { this.Left = (e.X - oldPoint.X); this.Top = (e.Y - oldPoint.Y); } } void Form1_MouseUp(object sender, MouseEventArgs e) { mouseDown = false; } void Form1_MouseDown(object sender, MouseEventArgs e) { oldPoint = e.Location; mouseDown = true; } protected override void OnHandleCreated(EventArgs e) { InitializeStyles(); base.OnHandleCreated(e); } protected override CreateParams CreateParams { get { CreateParams cParms = base.CreateParams; cParms.ExStyle |= 0x00080000; // WS_EX_LAYERED return cParms; } } private void InitializeStyles() { SetStyle(ControlStyles.AllPaintingInWmPaint, true); SetStyle(ControlStyles.UserPaint, true); UpdateStyles(); } public void SetBits() { if (BackgroundImage != null) { Bitmap bitmap = new Bitmap(BackgroundImage, Width, Height); 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); try { Win32.Point topLoc = new Win32.Point(Left, Top); Win32.Size bitMapSize = new Win32.Size(Width, 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); } } } public void SetStyle(int Style) { switch (Style) { case 1: img1 = new Bitmap(透明时钟.Properties.Resources.system); img2 = new Bitmap(透明时钟.Properties.Resources.system_h); img3 = new Bitmap(透明时钟.Properties.Resources.system_m); img4 = new Bitmap(透明时钟.Properties.Resources.system_s); img5 = new Bitmap(透明时钟.Properties.Resources.system_dot); img6 = new Bitmap(透明时钟.Properties.Resources.system_highlights); break; case 2: img1 = new Bitmap(透明时钟.Properties.Resources.trad); img2 = new Bitmap(透明时钟.Properties.Resources.trad_h); img3 = new Bitmap(透明时钟.Properties.Resources.trad_m); img4 = new Bitmap(透明时钟.Properties.Resources.trad_s); img5 = new Bitmap(透明时钟.Properties.Resources.trad_dot); img6 = new Bitmap(透明时钟.Properties.Resources.trad_highlights); break; case 3: img1 = new Bitmap(透明时钟.Properties.Resources.modern); img2 = new Bitmap(透明时钟.Properties.Resources.modern_h); img3 = new Bitmap(透明时钟.Properties.Resources.modern_m); img4 = new Bitmap(透明时钟.Properties.Resources.modern_s); img5 = new Bitmap(透明时钟.Properties.Resources.modern_dot); img6 = new Bitmap(透明时钟.Properties.Resources.modern_highlights); break; case 4: img1 = new Bitmap(透明时钟.Properties.Resources.flower); img2 = new Bitmap(透明时钟.Properties.Resources.flower_h); img3 = new Bitmap(透明时钟.Properties.Resources.flower_m); img4 = new Bitmap(透明时钟.Properties.Resources.flower_s); img5 = new Bitmap(透明时钟.Properties.Resources.flower_dot); img6 = new Bitmap(透明时钟.Properties.Resources.flower_highlights); break; } } public void Draw() { //当前时间 int h = DateTime.Now.Hour; int m = DateTime.Now.Minute; int s = DateTime.Now.Second; BackgroundImage = new Bitmap(Width, Height); Graphics g = Graphics.FromImage(BackgroundImage); //背景 g.DrawImage(img1, 0, 0, img1.Width, img1.Height); //坐标中心平移 g.TranslateTransform((float)Width / 2.0f, (float)Height / 2.0f); //时针 g.RotateTransform(30.0f * h 30.0f * (float)(m / 60.0f)); g.DrawImage(img2, -img2.Width / 2, -img2.Height / 2, img2.Width, img2.Height); g.RotateTransform(-30.0f * h - 30.0f * (float)(m / 60.0f)); //分针 g.RotateTransform(360.0f * (float)(m / 60.0f)); g.DrawImage(img3, -img3.Width / 2, -img3.Height / 2, img3.Width, img3.Height); g.RotateTransform(-360.0f * (float)(m / 60.0f)); //秒针 g.RotateTransform((float)s * 360 / 60.0f); g.DrawImage(img4, -img4.Width / 2, -img4.Height / 2, img4.Width, img4.Height); g.RotateTransform(-(float)s * 360 / 60.0f); //转轴 g.DrawImage(img5, -img5.Width / 2, -img5.Height / 2, img5.Width, img5.Height); //坐标中心平移还原 g.TranslateTransform(-(float)Width / 2.0f, -(float)Height / 2.0f); //表盖 g.DrawImage(img6, 0, 0, img1.Width, img1.Height); SetBits(); } private void Form1_Load(object sender, EventArgs e) { SetStyle(1); timer1.Interval = 1000; timer1.Start(); } private void timer1_Tick(object sender, EventArgs e) { Draw(); } private void 银色ToolStripMenuItem_Click(object sender, EventArgs e) { SetStyle(1); } private void 黑色ToolStripMenuItem_Click(object sender, EventArgs e) { SetStyle(2); } private void 红色ToolStripMenuItem_Click(object sender, EventArgs e) { SetStyle(3); } private void 花瓣ToolStripMenuItem_Click(object sender, EventArgs e) { SetStyle(4); } private void 关闭ToolStripMenuItem_Click(object sender, EventArgs e) { MessageBox.Show("作者:刘典武(游龙工作室)", "呵呵", MessageBoxButtons.OK, MessageBoxIcon.Information); } private void 退出ToolStripMenuItem_Click(object sender, EventArgs e) { Application.Exit(); } } }
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