实例介绍
【实例简介】
钟源码
可以自己下载看看，很好的实例
【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;
using System.Runtime.InteropServices;
namespace clock
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
Bitmap b = new Bitmap(global::clock.Properties.Resources.bkg);
Bitmap h = new Bitmap(global::clock.Properties.Resources.met2000);
Bitmap m = new Bitmap(global::clock.Properties.Resources.met2002);
Bitmap s = new Bitmap(global::clock.Properties.Resources.met2004);
public static Bitmap Rotate(Bitmap b, int angle)//图片旋转
{
angle =360 - angle % 360;
double radian = angle * Math.PI / 180.0;
double cos = Math.Cos(radian);
double sin = Math.Sin(radian);
//目标位图
Bitmap dsImage = new Bitmap(b.Width, b.Height);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(dsImage);
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bilinear;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
////构造图像显示区域：让图像的中心与窗口的中心点一致
Rectangle rect = new Rectangle(0, 0, b.Width, b.Height);
Point center = new Point(rect.X rect.Width / 2, rect.Y rect.Height / 2);
g.TranslateTransform(center.X, center.Y);
g.RotateTransform(360 - angle);
//恢复图像在水平和垂直方向的平移
g.TranslateTransform(-center.X, -center.Y);
g.DrawImage(b, rect);
//重至绘图的所有变换
g.ResetTransform();
g.Dispose();
return dsImage;
}
#region 窗体移动
[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
public const int WM_SYSCOMMAND = 0x0112;
public const int SC_MOVE = 0xF010;
public const int HTCAPTION = 0x0002;//无边框窗体移动
#endregion
#region 调用UpdateLayeredWindow函数
protected override CreateParams CreateParams
{//重载窗体的CreateParams方法
get
{
const int WS_MINIMIZEBOX = 0x00020000; // Winuser.h中定义
CreateParams cp = base.CreateParams;
cp.Style = cp.Style | WS_MINIMIZEBOX; // 允许最小化操作
cp.ExStyle |= 0x00080000; // WS_EX_LAYERED
return cp;
}
}
public void SetBits(Bitmap bitmap)//调用UpdateLayeredWindow（）方法。this.BackgroundImage为你事先准备的带透明图片。
{
//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);
try
{
Win32.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);
}
}
#endregion
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
ReleaseCapture();
SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE HTCAPTION, 0);//窗体移动
}
private void timer1_Tick(object sender, EventArgs e)
{
Bitmap bmp = new Bitmap(b);
Graphics g = Graphics.FromImage(bmp);
g.DrawImage(Rotate(h, DateTime.Now.Hour % 12 * 30 DateTime.Now.Minute / 2),27,25);//时
g.DrawImage(Rotate(m, DateTime.Now.Minute * 6),27,25);//分
g.DrawImage(Rotate(s, DateTime.Now.Second * 6),27,25);//秒针
SetBits(bmp);
g.Dispose();
bmp.Dispose();
GC.Collect();
}
private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();
}
private void 绿色ToolStripMenuItem_Click(object sender, EventArgs e)
{
b = new Bitmap(global::clock.Properties.Resources.bkg);
h = new Bitmap(global::clock.Properties.Resources.met2000);
m = new Bitmap(global::clock.Properties.Resources.met2002);
s = new Bitmap(global::clock.Properties.Resources.met2004);
蓝色ToolStripMenuItem.Checked = false;
金属ToolStripMenuItem.Checked = false;
黄色ToolStripMenuItem.Checked = false;
}
private void 蓝色ToolStripMenuItem_Click(object sender, EventArgs e)
{
b = new Bitmap(global::clock.Properties.Resources.bkg1);
h = new Bitmap(global::clock.Properties.Resources.met20001);
m = new Bitmap(global::clock.Properties.Resources.met20021);
s = new Bitmap(global::clock.Properties.Resources.met20041);
绿色ToolStripMenuItem.Checked = false;
金属ToolStripMenuItem.Checked = false;
黄色ToolStripMenuItem.Checked = false;
}
private void 金属ToolStripMenuItem_Click(object sender, EventArgs e)
{
b = new Bitmap(global::clock.Properties.Resources.bkg2);
h = new Bitmap(global::clock.Properties.Resources.met20002);
m = new Bitmap(global::clock.Properties.Resources.met20022);
s = new Bitmap(global::clock.Properties.Resources.met20042);
绿色ToolStripMenuItem.Checked = false;
蓝色ToolStripMenuItem.Checked = false;
黄色ToolStripMenuItem.Checked = false;
}
private void 黄色ToolStripMenuItem_Click(object sender, EventArgs e)
{
b = new Bitmap(global::clock.Properties.Resources.bkg3);
h = new Bitmap(global::clock.Properties.Resources.met20003);
m = new Bitmap(global::clock.Properties.Resources.met20023);
s = new Bitmap(global::clock.Properties.Resources.met20043);
绿色ToolStripMenuItem.Checked = false;
蓝色ToolStripMenuItem.Checked = false;
金属ToolStripMenuItem.Checked = false;
}
}
#region Win32 API声明
class Win32
{
[StructLayout(LayoutKind.Sequential)]
public struct Size
{
public Int32 cx;
public Int32 cy;
public Size(Int32 x, Int32 y)
{
cx = x;
cy = y;
}
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct BLENDFUNCTION
{
public byte BlendOp;
public byte BlendFlags;
public byte SourceConstantAlpha;
public byte AlphaFormat;
}
[StructLayout(LayoutKind.Sequential)]
public struct Point
{
public Int32 x;
public Int32 y;
public Point(Int32 x, Int32 y)
{
this.x = x;
this.y = y;
}
}
public const byte AC_SRC_OVER = 0;
public const Int32 ULW_ALPHA = 2;
public const byte AC_SRC_ALPHA = 1;
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
[DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
public static extern IntPtr GetDC(IntPtr hWnd);
[DllImport("gdi32.dll", ExactSpelling = true)]
public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObj);
[DllImport("user32.dll", ExactSpelling = true)]
public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
public static extern int DeleteDC(IntPtr hDC);
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
public static extern int DeleteObject(IntPtr hObj);
[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);
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
public static extern IntPtr ExtCreateRegion(IntPtr lpXform, uint nCount, IntPtr rgnData);
}
#endregion
}
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