DrawToolsRedux/Tool.cs

（完整代码） 887B 

using System.Windows.Forms;

namespace DrawTools
{
	/// <summary>
	/// Base class for all drawing tools
	/// </summary>
	internal abstract class Tool
	{
		/// <summary>
		/// Left nous button is pressed
		/// </summary>
		/// <param name="drawArea"></param>
		/// <param name="e"></param>
		public virtual void OnMouseDown(DrawArea drawArea, MouseEventArgs e)
		{
		}


		/// <summary>
		/// Mouse is moved, left mouse button is pressed or none button is pressed
		/// </summary>
		/// <param name="drawArea"></param>
		/// <param name="e"></param>
		public virtual void OnMouseMove(DrawArea drawArea, MouseEventArgs e)
		{
		}


		/// <summary>
		/// Left mouse button is released
		/// </summary>
		/// <param name="drawArea"></param>
		/// <param name="e"></param>
		public virtual void OnMouseUp(DrawArea drawArea, MouseEventArgs e)
		{
		}
	}
}

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