WinCE5.0下实现透明背景按钮(.net C#) 个人补充
针对上篇文章有童鞋提出一些疑问：
1.Command”(是否缺少 using 指令或程序集引用
2.没有创建Command枚举类型
3.编译不通过等
我先把我成功运行的代码贴出来给童鞋看下，略有改 。
界面后台类：
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.IO;using System.Reflection;
namespace DZB{ public partial class ImageButton : Form { public enum Command { cmd1 = 0,//无操作 cmd2,//第一项操作 cmd3,//第二项操作 cmd4,//可自己扩展 max }private IList<IButton> btnlist; private IButton capturedButton; private Font windowFont = new Font(FontFamily.GenericSansSerif, 12, FontStyle.Regular); private string CurrentPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase); private Bitmap bg, title;//背景、标题图片
public ImageButton() { InitializeComponent(); } //加载事件 初始化页面元素 private void ImageButton_Load(object sender, EventArgs e) { title = new Bitmap(CurrentPath + @"\Resources\title.bmp"); bg = new Bitmap(CurrentPath + @"\Resources\mainbg.bmp"); btnlist = new List<IButton>(); btnlist.Add(new IButton(this, CurrentPath + @"\Resources\", 100, 100, "button.bmp", "按钮1", Color.White, Color.Blue, Command.cmd1)); btnlist.Add(new IButton(this, CurrentPath + @"\Resources\", 100, 200, "button.bmp", "按钮2", Color.White, Color.Blue, Command.cmd1)); btnlist.Add(new IButton(this, CurrentPath + @"\Resources\", 100, 300, "button.bmp", "按钮3", Color.White, Color.Blue, Command.cmd2)); btnlist.Add(new IButton(this, CurrentPath + @"\Resources\", 100, 400, "button.bmp", "按钮4", Color.White, Color.Blue, Command.cmd2)); btnlist.Add(new IButton(this, CurrentPath + @"\Resources\", 400, 100, "button.bmp", "按钮5", Color.White, Color.Blue, Command.cmd2)); btnlist.Add(new IButton(this, CurrentPath + @"\Resources\", 400, 200, "button.bmp", "按钮6", Color.White, Color.Blue, Command.cmd2)); btnlist.Add(new IButton(this, CurrentPath + @"\Resources\", 400, 300, "button.bmp", "按钮7", Color.White, Color.Blue, Command.cmd2)); btnlist.Add(new IButton(this, CurrentPath + @"\Resources\", 400, 400, "button.bmp", "按钮8", Color.White, Color.Blue, Command.cmd3)); } private void ImageButton_Paint(object sender, PaintEventArgs e) { // Buttons Graphics graphics; graphics = e.Graphics; graphics.DrawImage(title, 0, 0); graphics.DrawImage(bg, 0, 63); // Edit line foreach (IButton btn in btnlist) { btn.Render(graphics); } } protected override void OnPaintBackground(PaintEventArgs paintArgs) {//gr.DrawImage(img, 0, 0); base.OnPaintBackground(paintArgs); }
private void ImageButton_MouseDown(object sender, MouseEventArgs e) { foreach (IButton btn in btnlist) { if (btn.IsHit(e.X, e.Y)) { btn.IsSelected = true; capturedButton = btn; break; } }}
private void ImageButton_MouseMove(object sender, MouseEventArgs e) { if (capturedButton != null) { capturedButton.IsSelected = capturedButton.IsHit(e.X, e.Y); }}
private void ImageButton_MouseUp(object sender, MouseEventArgs e) { if (capturedButton != null) { if (capturedButton.IsHit(e.X, e.Y)) DoCommand(capturedButton.Cmd); try { capturedButton.IsSelected = false; capturedButton = null; } catch {} }
}
private void DoCommand(Command command) { switch (command) { case Command.cmd1://0 // this.Close(); break; case Command.cmd2://1 MessageBox.Show("cmd2"); break; case Command.cmd3://2 this.Close(); break; case Command.cmd4://3 { //Line nl = new Line(); //nl.Show(); } break; default: break; } }}}
IButton.cs 类：
using System;
using System.Collections.Generic;using System.Text;using System.Windows.Forms;using System.Drawing;using System.Drawing.Imaging;
namespace DZB{ public class IButton { private Control MainForm; private Font sFont = new Font(FontFamily.GenericSansSerif, 16, FontStyle.Bold); private Font sFont_ = new Font(FontFamily.GenericSansSerif, 16, FontStyle.Bold); private bool IsSelectedValue; private DZB.ImageButton.Command ButtonCommand; private Rectangle selfRec; private string _caption; private float _cx, _cy;//画标题的位置 private Bitmap btnbg, btnbg_; private string _CurrentPath; Color transpColor = Color.FromArgb(255, 0, 255);//资源文件的透明色 ImageAttributes imageAttr; Color _ncolor, _fcolor; Graphics g, g_; /// <summary> /// 初始化 /// </summary> /// <param name="form">容器名称</param> /// <param name="CurrentPath">当前程序路径</param> /// <param name="x">按钮位置X</param> /// <param name="y">按钮位置Y</param> /// <param name="bgfilename">按钮图片名称</param> /// <param name="caption">标题</param> /// <param name="nColor">正常颜色</param> /// <param name="fColor">激活颜色</param> /// <param name="cmd">指令</param> public IButton(Control form, string CurrentPath, int x, int y, string bgfilename, string caption, Color nColor, Color fColor, DZB.ImageButton.Command cmd) { MainForm = form; _ncolor = nColor; _fcolor = fColor; ButtonCommand = cmd; _caption = caption; _CurrentPath = CurrentPath; string bg = CurrentPath + bgfilename; string bg_ = CurrentPath + System.IO.Path.GetFileNameWithoutExtension(bg) + "_.bmp"; btnbg = new Bitmap(bg); selfRec = new Rectangle(x, y, btnbg.Width, btnbg.Height); g = Graphics.FromImage(btnbg); _cx = (219 - g.MeasureString(_caption, sFont).Width) / 2; _cy = (48 - g.MeasureString(_caption, sFont).Height) / 2; btnbg_ = new Bitmap(bg_); g_ = Graphics.FromImage(btnbg_); imageAttr = new ImageAttributes(); imageAttr.SetColorKey(transpColor, transpColor); } public void Render(Graphics graphics) { if (IsSelectedValue) {//点下的状态 g_.DrawString(_caption, sFont_, new SolidBrush(_fcolor), _cx, _cy); graphics.DrawImage(btnbg_, selfRec, 0, 0, selfRec.Width, selfRec.Height, GraphicsUnit.Pixel, imageAttr); } else { g.DrawString(_caption, sFont, new SolidBrush(_ncolor), _cx, _cy); graphics.DrawImage(btnbg, selfRec, 0, 0, selfRec.Width, selfRec.Height, GraphicsUnit.Pixel, imageAttr); } } private static Color GetTransparentColor(Image image) { return ((Bitmap)image).GetPixel(image.Width - 1, image.Height - 1); } public bool IsHit(int x, int y) { return (x >= selfRec.X && x < selfRec.X + selfRec.Width && y >= selfRec.Y && y < selfRec.Y + selfRec.Height); } public bool IsSelected { get { return IsSelectedValue; } set { Graphics graphics; if (value != IsSelectedValue) { IsSelectedValue = value;// Redraw right away graphics = MainForm.CreateGraphics(); this.Render(graphics); graphics.Dispose();
} } }
public DZB.ImageButton.Command Cmd { get { return (ButtonCommand); } } }}
解决方案试图：
最后我将我的工程打包，下载地址为：
http://download.csdn.net/download/sat472291519/4431268
最后补充一点 如果在指定目录下找不到图片 则表明，你未将图片放到PDA目录下面
