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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