Added Redo feature

Paint_2/DotPencil.cs

@@ -15,23 +15,33 @@ namespace Paint_2
     public class DotPencil:PaintTool
     {
         private List<List<Point>> _drawings;
+        private List<List<Point>> _drawingsRedo;
         private List<Color> _colors;
+        private List<Color> _colorsRedo;
         private List<int> _widths;
+        private List<int> _widthsRedo;
         private Color _color;
         private string _name;
         private int _width;
+
         public List<List<Point>> Drawings { get => _drawings; set => _drawings = value; }
+        public List<List<Point>> DrawingsRedo { get => _drawingsRedo; set => _drawingsRedo = value; }
         public List<Color> Colors { get => _colors; set => _colors = value; }
+        public List<Color> ColorsRedo { get => _colorsRedo; set => _colorsRedo = value; }
         public List<int> Widths { get => _widths; set => _widths = value; }
+        public List<int> WidthsRedo { get => _widthsRedo; set => _widthsRedo = value; }
         public Color Color { get => _color; set => _color = value; }
-        public int Width { get => _width; set => _width = value; }
         public string Name { get => _name; set => _name = value; }
+        public int Width { get => _width; set => _width = value; }
 
         public DotPencil(string name)
         {
             Drawings = new List<List<Point>>();
+            DrawingsRedo = new List<List<Point>>();
             Colors = new List<Color>();
+            ColorsRedo = new List<Color>();
             Widths = new List<int>();
+            WidthsRedo = new List<int>();
             Name = name;
         }
         public void Add(Point point)
@@ -108,18 +118,38 @@ namespace Paint_2
 
         public void Undo()
         {
+            int last = Drawings.Count - 1;
             if (Drawings.Count > 1)
             {
+                DrawingsRedo.Add(Drawings[last]);
                 Drawings.RemoveAt(Drawings.Count - 1);
+                ColorsRedo.Add(Colors[last]);
                 Colors.RemoveAt(Colors.Count - 1);
+                WidthsRedo.Add(Widths[last]);
                 Widths.RemoveAt(Widths.Count - 1);
             }
             else
             {
+                DrawingsRedo.Add(Drawings[0]);
                 Drawings.Clear();
+                ColorsRedo.Add(Colors[0]);
                 Colors.Clear();
+                WidthsRedo.Add(Widths[0]);
                 Widths.Clear();
             }
         }
+
+        public void Redo()
+        {
+            if (DrawingsRedo.Count > 0 && WidthsRedo.Count > 0 && ColorsRedo.Count > 0)
+            {
+                Drawings.Add(DrawingsRedo[DrawingsRedo.Count - 1]);
+                DrawingsRedo.RemoveAt(DrawingsRedo.Count - 1);
+                Colors.Add(ColorsRedo[ColorsRedo.Count - 1]);
+                ColorsRedo.RemoveAt(ColorsRedo.Count - 1);
+                Widths.Add(WidthsRedo[WidthsRedo.Count - 1]);
+                WidthsRedo.RemoveAt(WidthsRedo.Count - 1);
+            }
+        }
     }
 }

Paint_2/Form1.Designer.cs

@@ -74,6 +74,7 @@
             this.label2 = new System.Windows.Forms.Label();
             this.lsbTools = new System.Windows.Forms.ListBox();
             this.btnUndo = new System.Windows.Forms.Button();
+            this.btnRedo = new System.Windows.Forms.Button();
             ((System.ComponentModel.ISupportInitialize)(this.canvas)).BeginInit();
             this.panelFile.SuspendLayout();
             this.panelDrawing.SuspendLayout();
@@ -574,6 +575,7 @@
             // 
             this.panelTools.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
             this.panelTools.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(31)))), ((int)(((byte)(31)))), ((int)(((byte)(31)))));
+            this.panelTools.Controls.Add(this.btnRedo);
             this.panelTools.Controls.Add(this.btnUndo);
             this.panelTools.Controls.Add(this.btnRandomColor);
             this.panelTools.Controls.Add(this.label2);
@@ -646,12 +648,26 @@
             this.btnUndo.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(214)))), ((int)(((byte)(214)))), ((int)(((byte)(214)))));
             this.btnUndo.Location = new System.Drawing.Point(3, 547);
             this.btnUndo.Name = "btnUndo";
-            this.btnUndo.Size = new System.Drawing.Size(157, 43);
+            this.btnUndo.Size = new System.Drawing.Size(75, 43);
             this.btnUndo.TabIndex = 35;
             this.btnUndo.Text = "Undo";
             this.btnUndo.UseVisualStyleBackColor = false;
             this.btnUndo.Click += new System.EventHandler(this.btnUndo_Click);
             // 
+            // btnRedo
+            // 
+            this.btnRedo.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(41)))), ((int)(((byte)(41)))), ((int)(((byte)(41)))));
+            this.btnRedo.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
+            this.btnRedo.Font = new System.Drawing.Font("Cascadia Code", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnRedo.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(214)))), ((int)(((byte)(214)))), ((int)(((byte)(214)))));
+            this.btnRedo.Location = new System.Drawing.Point(85, 547);
+            this.btnRedo.Name = "btnRedo";
+            this.btnRedo.Size = new System.Drawing.Size(75, 43);
+            this.btnRedo.TabIndex = 36;
+            this.btnRedo.Text = "Redo";
+            this.btnRedo.UseVisualStyleBackColor = false;
+            this.btnRedo.Click += new System.EventHandler(this.btnRedo_Click);
+            // 
             // PaintForm
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 18F);
@@ -739,6 +755,7 @@
         private System.Windows.Forms.Label lblWidth;
         private System.Windows.Forms.Button btnRandomColor;
         private System.Windows.Forms.Button btnUndo;
+        private System.Windows.Forms.Button btnRedo;
     }
 }
 

Paint_2/Form1.cs

@@ -253,5 +253,11 @@ namespace Paint_2
             sketch.Undo();
             ForceRefresh();
         }
+
+        private void btnRedo_Click(object sender, EventArgs e)
+        {
+            sketch.Redo();
+            ForceRefresh();
+        }
     }
 }

Paint_2/PaintTool.cs

@@ -15,9 +15,12 @@ namespace Paint_2
     internal interface PaintTool
     {
         List<List<Point>> Drawings { get; set; }
+        List<List<Point>> DrawingsRedo { get; set; }
         List<Color> Colors { get; set; }
+        List<Color> ColorsRedo { get; set; }
         Color Color { get; set; }
         List<int> Widths { get; set; }
+        List<int> WidthsRedo { get; set; }
         int Width { get; set; }
         string Name { get; set; }
 
@@ -25,6 +28,7 @@ namespace Paint_2
         void Stop(Point point);
         void Add(Point point);
         void Undo();
+        void Redo();
         void Clear();
         List<Color> GetLastColors(int colorNumber); 
         void Paint(Bitmap canvas);

Paint_2/Pencil.cs

@@ -15,23 +15,33 @@ namespace Paint_2
     internal class Pencil : PaintTool
     {
         private List<List<Point>> _drawings;
+        private List<List<Point>> _drawingsRedo;
         private List<Color> _colors;
+        private List<Color> _colorsRedo;
         private List<int> _widths;
+        private List<int> _widthsRedo;
         private Color _color;
         private string _name;
         private int _width;
+
         public List<List<Point>> Drawings { get => _drawings; set => _drawings = value; }
+        public List<List<Point>> DrawingsRedo { get => _drawingsRedo; set => _drawingsRedo = value; }
         public List<Color> Colors { get => _colors; set => _colors = value; }
+        public List<Color> ColorsRedo { get => _colorsRedo; set => _colorsRedo = value; }
         public List<int> Widths { get => _widths; set => _widths = value; }
+        public List<int> WidthsRedo { get => _widthsRedo; set => _widthsRedo = value; }
         public Color Color { get => _color; set => _color = value; }
-        public int Width { get => _width; set => _width = value; }
         public string Name { get => _name; set => _name = value; }
+        public int Width { get => _width; set => _width = value; }
 
         public Pencil(string name)
         {
             Drawings = new List<List<Point>>();
+            DrawingsRedo = new List<List<Point>>();
             Colors = new List<Color>();
+            ColorsRedo = new List<Color>();
             Widths = new List<int>();
+            WidthsRedo = new List<int>();
             Name = name;
         }
         public void Add(Point point)
@@ -109,18 +119,38 @@ namespace Paint_2
 
         public void Undo()
         {
+            int last = Drawings.Count - 1;
             if (Drawings.Count > 1)
             {
+                DrawingsRedo.Add(Drawings[last]);
                 Drawings.RemoveAt(Drawings.Count -1);
+                ColorsRedo.Add(Colors[last]);
                 Colors.RemoveAt(Colors.Count -1);
+                WidthsRedo.Add(Widths[last]);
                 Widths.RemoveAt(Widths.Count -1);
             }
             else
             {
+                DrawingsRedo.Add(Drawings[0]);
                 Drawings.Clear();
+                ColorsRedo.Add(Colors[0]);
                 Colors.Clear();
+                WidthsRedo.Add(Widths[0]);
                 Widths.Clear();
             }
         }
+
+        public void Redo()
+        {
+            if (DrawingsRedo.Count > 0 && WidthsRedo.Count > 0 && ColorsRedo.Count > 0)
+            {
+                Drawings.Add(DrawingsRedo[DrawingsRedo.Count -1]);
+                DrawingsRedo.RemoveAt(DrawingsRedo.Count - 1);
+                Colors.Add(ColorsRedo[ColorsRedo.Count -1]);
+                ColorsRedo.RemoveAt(ColorsRedo.Count - 1);
+                Widths.Add(WidthsRedo[WidthsRedo.Count -1]);
+                WidthsRedo.RemoveAt(WidthsRedo.Count - 1);
+            }
+        }
     }
 }

Paint_2/Sketch.cs

@@ -68,6 +68,10 @@ namespace Paint_2
         {
             CurrentTool.Undo();
         }
+        public void Redo()
+        {
+            CurrentTool.Redo();
+        }
         public void StartDrawing(Point location,Color color,int width)
         {
             CurrentTool.Start(color,width);