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 。
原作者的思路理解：
初始化参数 路径 背景图片 背景标题 字体颜色 字体类型
设置按钮 属性 将 当前this，路径，坐标，图片名称，显示文字，当前字体颜色，点击后字体颜色，指令传过去 将类中的属性赋值，并计算出文字坐标 点击后文字字体颜色，按钮背景颜色等 相应属性赋值
页面开始重绘
先绘制背景与背景标题
根据按钮是否选择状态 循环绘制按钮
在窗体鼠标移动事件中 不断的判断当前鼠标是否在已经选中按钮 鼠标的坐标在所绘制的按钮区域内
如果在鼠标绘制的区域点击下去 将触发判断 循环判断在那个按钮区域内点击 并激活该按钮的是否选中属性 并将该按钮属性 赋值给当前的临时按钮
在鼠标释放的时候 触发 鼠标坐标是否在点击按钮的区域内 如果是则执行 赋给改按钮的指令，在结构中可以扩展该指令
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
