From 84c3a977d670874a2583df837cb355d38fa0965d Mon Sep 17 00:00:00 2001
From: Jaex <Jaex@users.noreply.github.com>
Date: Mon, 15 Aug 2016 02:11:21 +0300
Subject: [PATCH] Adding freehand drawing support

---
 ShareX.ScreenCaptureLib/Enums.cs              |   1 +
 .../Shapes/Drawing/FreehandDrawingShape.cs    | 126 ++++++++++++++++++
 .../Shapes/ShapeManager.cs                    |   4 +
 .../ShareX.ScreenCaptureLib.csproj            |   1 +
 4 files changed, 132 insertions(+)
 create mode 100644 ShareX.ScreenCaptureLib/Shapes/Drawing/FreehandDrawingShape.cs

diff --git a/ShareX.ScreenCaptureLib/Enums.cs b/ShareX.ScreenCaptureLib/Enums.cs
index 0cbf34302..d10c49a98 100644
--- a/ShareX.ScreenCaptureLib/Enums.cs
+++ b/ShareX.ScreenCaptureLib/Enums.cs
@@ -174,6 +174,7 @@ public enum ShapeType // Localized
         DrawingRectangle,
         DrawingRoundedRectangle,
         DrawingEllipse,
+        DrawingFreehand,
         DrawingLine,
         DrawingArrow,
         DrawingText,
diff --git a/ShareX.ScreenCaptureLib/Shapes/Drawing/FreehandDrawingShape.cs b/ShareX.ScreenCaptureLib/Shapes/Drawing/FreehandDrawingShape.cs
new file mode 100644
index 000000000..02e240559
--- /dev/null
+++ b/ShareX.ScreenCaptureLib/Shapes/Drawing/FreehandDrawingShape.cs
@@ -0,0 +1,126 @@
+#region License Information (GPL v3)
+
+/*
+    ShareX - A program that allows you to take screenshots and share any file type
+    Copyright (c) 2007-2016 ShareX Team
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+    Optionally you can also view the license at <http://www.gnu.org/licenses/>.
+*/
+
+#endregion License Information (GPL v3)
+
+using ShareX.HelpersLib;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+
+namespace ShareX.ScreenCaptureLib
+{
+    public class FreehandDrawingShape : BaseDrawingShape
+    {
+        public override ShapeType ShapeType { get; } = ShapeType.DrawingFreehand;
+
+        public override bool ShowResizeNodes { get; } = false;
+
+        public Point LastPosition
+        {
+            get
+            {
+                if (points.Count > 0)
+                {
+                    return points[points.Count - 1];
+                }
+
+                return Point.Empty;
+            }
+            set
+            {
+                if (points.Count > 0)
+                {
+                    points[points.Count - 1] = value;
+                }
+            }
+        }
+
+        private List<Point> points = new List<Point>();
+        private bool isPolygonMode;
+
+        public override bool Intersects(Point position)
+        {
+            return false;
+        }
+
+        public override void OnUpdate()
+        {
+            if (Manager.IsCreating)
+            {
+                if (Manager.IsCornerMoving)
+                {
+                    Move(InputManager.MouseVelocity);
+                }
+                else
+                {
+                    Point pos = InputManager.MousePosition0Based;
+
+                    if (points.Count == 0 || (!Manager.IsProportionalResizing && LastPosition != pos))
+                    {
+                        points.Add(pos);
+                    }
+
+                    if (Manager.IsProportionalResizing)
+                    {
+                        if (!isPolygonMode)
+                        {
+                            points.Add(pos);
+                        }
+
+                        LastPosition = pos;
+                    }
+
+                    isPolygonMode = Manager.IsProportionalResizing;
+
+                    Rectangle = points.CreateRectangle();
+                }
+            }
+            else if (Manager.IsMoving)
+            {
+                Move(InputManager.MouseVelocity);
+            }
+        }
+
+        public override void OnDraw(Graphics g)
+        {
+            if (points.Count > 1 && BorderSize > 0 && BorderColor.A > 0)
+            {
+                g.SmoothingMode = SmoothingMode.HighQuality;
+
+                using (Pen pen = new Pen(BorderColor, BorderSize))
+                using (GraphicsPath gp = new GraphicsPath())
+                {
+                    for (int i = 0; i < points.Count - 1; i++)
+                    {
+                        gp.AddLine(points[i], points[i + 1]);
+                    }
+
+                    g.DrawPath(pen, gp);
+                }
+
+                g.SmoothingMode = SmoothingMode.None;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/ShareX.ScreenCaptureLib/Shapes/ShapeManager.cs b/ShareX.ScreenCaptureLib/Shapes/ShapeManager.cs
index 35f3fabd8..2ad9a9d1b 100644
--- a/ShareX.ScreenCaptureLib/Shapes/ShapeManager.cs
+++ b/ShareX.ScreenCaptureLib/Shapes/ShapeManager.cs
@@ -1274,6 +1274,9 @@ private BaseShape CreateShape(ShapeType shapeType)
                 case ShapeType.DrawingEllipse:
                     shape = new EllipseDrawingShape();
                     break;
+                case ShapeType.DrawingFreehand:
+                    shape = new FreehandDrawingShape();
+                    break;
                 case ShapeType.DrawingLine:
                     shape = new LineDrawingShape();
                     break;
@@ -1381,6 +1384,7 @@ private void CheckHover()
                     switch (CurrentShapeType)
                     {
                         case ShapeType.RegionFreehand:
+                        case ShapeType.DrawingFreehand:
                         case ShapeType.DrawingLine:
                         case ShapeType.DrawingArrow:
                         case ShapeType.DrawingStep:
diff --git a/ShareX.ScreenCaptureLib/ShareX.ScreenCaptureLib.csproj b/ShareX.ScreenCaptureLib/ShareX.ScreenCaptureLib.csproj
index 5b5a8815a..113513326 100644
--- a/ShareX.ScreenCaptureLib/ShareX.ScreenCaptureLib.csproj
+++ b/ShareX.ScreenCaptureLib/ShareX.ScreenCaptureLib.csproj
@@ -92,6 +92,7 @@
     <Compile Include="Shapes\BaseShape.cs" />
     <Compile Include="Shapes\Drawing\ArrowDrawingShape.cs" />
     <Compile Include="Shapes\Drawing\BaseDrawingShape.cs" />
+    <Compile Include="Shapes\Drawing\FreehandDrawingShape.cs" />
     <Compile Include="Shapes\Drawing\StepDrawingShape.cs" />
     <Compile Include="Shapes\Region\FreehandRegionShape.cs" />
     <Compile Include="Shapes\TextDrawingOptions.cs" />