添加项目文件。

RevitTools.DrawTool/DrawBase.cs

@@ -0,0 +1,94 @@
+using System.Drawing;
+using System.Drawing.Drawing2D;
+
+namespace RevitTools.DrawTool
+{
+    /// <summary>
+    /// 基本绘图对象
+    /// </summary>
+    public abstract class DrawBase
+    {
+        internal Color m_BackColor;
+        internal Color m_ForeColor;
+
+
+        /// <summary>
+        /// 背景色
+        /// </summary>
+        public Color BackColor
+        {
+            get { return m_BackColor; }
+            set { m_BackColor = value; }
+        }
+
+        /// <summary>
+        /// 前景色
+        /// </summary>
+        public Color ForeColor
+        {
+            get { return m_ForeColor; }
+            set { m_ForeColor = value; }
+        }
+
+        /// <summary>
+        /// 获取图形外接矩形
+        /// </summary>
+        /// <returns>图形的外接矩形</returns>
+        public abstract Rectangle GetBound();
+
+        /// <summary>
+        /// 在指定的Graphics上绘制图形
+        /// </summary>
+        /// <param name="g">指定的 Graphics</param>
+        public abstract void Draw(Graphics g);
+
+        /// <summary>
+        /// 命中测试
+        /// </summary>
+        /// <returns></returns>
+        public virtual bool HitTest(Point point)
+        {
+            var bound = GetBound();
+            if (bound.Left > point.X || bound.Right < point.X
+                || bound.Top > point.Y || bound.Bottom > point.Y)
+                return false;
+
+            using (var bmp = new Bitmap(bound.Width, bound.Height))
+            using (var g = Graphics.FromImage(bmp))
+            {
+                var dx = -bound.X;
+                var dy = -bound.Y;
+
+                var obj = this.Clone();
+                obj.Draw(g);
+
+                return bmp.GetPixel(point.X + dx, point.Y + dy).A == 0;
+            }
+        }
+
+        /// <summary>
+        /// 移动对象
+        /// </summary>
+        /// <param name="dx">X 偏移量</param>
+        /// <param name="dy">Y 偏移量</param>
+        public abstract void Move(int dx, int dy);
+
+        public virtual DrawBase Clone()
+        {
+            return this.MemberwiseClone() as DrawBase;
+        }
+    }
+    public static class ExtensionMethods
+    {
+        public static Matrix SetTranslate(this Matrix matrix, float offsetX, float offsetY)
+        {
+            matrix.Translate(offsetX, offsetY);
+            return matrix;
+        }
+        public static Matrix SetTranslate(this Matrix matrix, float offsetX, float offsetY, MatrixOrder order)
+        {
+            matrix.Translate(offsetX, offsetY);
+            return matrix;
+        }
+    }
+}