C#中定义可拖动的曲线控件支持Gamma曲线

因为在项目中要调整Gamma曲线，而我又不是很了解曲线的算法，所以纠结了很久。 最终终于找到了一个比较好的例子，然后结合项目实际做了一些修改。 代码中包含两个控件，一个是单条曲线的拖动控件，另外一个是多个曲线的拖动控件，工程是用VS2010建的。 感兴趣的可以把代码Down下来看一下，如果发现我的代码有bug或其他需要改进的地方欢迎留言进行指导，不胜感激！

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2011-11-30 14:38  WindowsFormsApplication4\
     目录           0  2011-11-30 16:08  WindowsFormsApplication4\WindowsFormsApplication4\
     文件         914  2011-11-30 14:38  WindowsFormsApplication4\WindowsFormsApplication4.sln
     文件       23552  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4.suo
     目录           0  2011-11-30 15:06  WindowsFormsApplication4\WindowsFormsApplication4\bin\
     目录           0  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\bin\Debug\
     文件       27136  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\bin\Debug\WindowsFormsApplication4.exe
     文件       67072  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\bin\Debug\WindowsFormsApplication4.pdb
     文件       11608  2011-11-30 16:11  WindowsFormsApplication4\WindowsFormsApplication4\bin\Debug\WindowsFormsApplication4.vshost.exe
     目录           0  2011-11-30 15:06  WindowsFormsApplication4\WindowsFormsApplication4\bin\Release\
     文件         507  2011-11-30 16:00  WindowsFormsApplication4\WindowsFormsApplication4\Form1.cs
     文件        2633  2011-11-30 16:00  WindowsFormsApplication4\WindowsFormsApplication4\Form1.Designer.cs
     文件        5817  2011-11-30 16:00  WindowsFormsApplication4\WindowsFormsApplication4\Form1.resx
     文件         525  2011-11-30 16:08  WindowsFormsApplication4\WindowsFormsApplication4\Form2.cs
     文件        4051  2011-11-30 16:11  WindowsFormsApplication4\WindowsFormsApplication4\Form2.Designer.cs
     目录           0  2011-11-30 14:38  WindowsFormsApplication4\WindowsFormsApplication4\obj\
     目录           0  2011-11-30 14:38  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\
     目录           0  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\
     文件        4652  2011-11-30 16:07  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        5407  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     文件         874  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\GenerateResource-ResGen.read.1.tlog
     文件        1762  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\GenerateResource-ResGen.write.1.tlog
     目录           0  2011-11-30 14:38  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\TempPE\
     文件        1373  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\WindowsFormsApplication4.csproj.FileListAbsolute.txt
     文件       27136  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\WindowsFormsApplication4.exe
     文件         180  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\WindowsFormsApplication4.Form1.resources
     文件       67072  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\WindowsFormsApplication4.pdb
     文件         180  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\WindowsFormsApplication4.Properties.Resources.resources
     文件         180  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\WindowsFormsApplication4.UserControl1.resources
     文件         180  2011-11-30 16:16  WindowsFormsApplication4\WindowsFormsApplication4\obj\x86\Debug\WindowsFormsApplication4.UserControl2.resources
     文件         485  2011-11-30 14:38  WindowsFormsApplication4\WindowsFormsApplication4\Program.cs
............此处省略15个文件信息