Fixed cursor offset problem

Paint_2/Form1.Designer.cs

@@ -221,6 +221,7 @@
             this.btnColorHistory4.Size = new System.Drawing.Size(25, 25);
             this.btnColorHistory4.TabIndex = 4;
             this.btnColorHistory4.UseVisualStyleBackColor = false;
+            this.btnColorHistory4.Click += new System.EventHandler(this.BtnColor_Click);
             // 
             // btnColorHistory3
             // 
@@ -232,6 +233,7 @@
             this.btnColorHistory3.Size = new System.Drawing.Size(25, 25);
             this.btnColorHistory3.TabIndex = 3;
             this.btnColorHistory3.UseVisualStyleBackColor = false;
+            this.btnColorHistory3.Click += new System.EventHandler(this.BtnColor_Click);
             // 
             // btnColorHistory2
             // 
@@ -243,6 +245,7 @@
             this.btnColorHistory2.Size = new System.Drawing.Size(25, 25);
             this.btnColorHistory2.TabIndex = 2;
             this.btnColorHistory2.UseVisualStyleBackColor = false;
+            this.btnColorHistory2.Click += new System.EventHandler(this.BtnColor_Click);
             // 
             // btnColorHistory1
             // 
@@ -254,6 +257,7 @@
             this.btnColorHistory1.Size = new System.Drawing.Size(25, 25);
             this.btnColorHistory1.TabIndex = 0;
             this.btnColorHistory1.UseVisualStyleBackColor = false;
+            this.btnColorHistory1.Click += new System.EventHandler(this.BtnColor_Click);
             // 
             // lblSelectedColor
             // 
@@ -388,10 +392,11 @@
             this.nupPencilWidth.Size = new System.Drawing.Size(141, 21);
             this.nupPencilWidth.TabIndex = 17;
             this.nupPencilWidth.Value = new decimal(new int[] {
-            2,
+            10,
             0,
             0,
             0});
+            this.nupPencilWidth.ValueChanged += new System.EventHandler(this.nupPencilWidth_ValueChanged);
             // 
             // label8
             // 
@@ -503,6 +508,7 @@
             this.btnClear.TabIndex = 27;
             this.btnClear.Text = "Clear";
             this.btnClear.UseVisualStyleBackColor = false;
+            this.btnClear.Click += new System.EventHandler(this.btnClear_Click);
             // 
             // btnFill
             // 

Paint_2/Form1.cs

@@ -32,12 +32,13 @@ namespace Paint_2
         }
         private Point MousePositionToCanvasPosition()
         {
-            return new Point(MousePosition.X - canvas.Location.X,MousePosition.Y - canvas.Location.Y);
+            //return new Point(MousePosition.X - canvas.Location.X, MousePosition.Y - canvas.Location.Y);
+            return canvas.PointToClient(MousePosition);
         }
         private void canvas_MouseDown(object sender, MouseEventArgs e)
         {
             drawing = true;
-            sketch.StartDrawing(MousePositionToCanvasPosition(), Color.FromArgb(rnd.Next(0,256), rnd.Next(0, 256), rnd.Next(0, 256)), (int)nupPencilWidth.Value);
+            sketch.StartDrawing(MousePositionToCanvasPosition(), Color.FromArgb(rnd.Next(0, 256), rnd.Next(0, 256), rnd.Next(0, 256)), (int)nupPencilWidth.Value);
             tmrRefresh.Enabled = true;
 
             List<Color> colorHistory = sketch.CurrentTool.GetLastColors(4);
@@ -50,8 +51,8 @@ namespace Paint_2
         {
             tmrRefresh.Enabled = false;
             sketch.AddDrawingPoint(MousePositionToCanvasPosition());
-            canvas.Image = sketch.Paint();
             drawing = false;
+            RefreshUi();
         }
 
         private void tmrRefresh_Tick(object sender, EventArgs e)
@@ -59,8 +60,39 @@ namespace Paint_2
             if (drawing)
             {
                 sketch.AddDrawingPoint(MousePositionToCanvasPosition());
-                canvas.Image = sketch.Paint();
+
             }
+            RefreshUi();
+        }
+        private void BtnColor_Click(object sender, EventArgs e)
+        {
+            Button button = sender as Button;
+            sketch.ChangePaintToolColor(button.BackColor);
+            tmrRefresh_Tick(sender, e);
+        }
+        private string ColorToString(Color color)
+        {
+            // Expected Hex:FFFFFF R:255 G:255 B:255
+            string result = "";
+            int toBase = 16;
+            result += "Hex:" + Convert.ToString(color.R, toBase) + Convert.ToString(color.G, toBase) + Convert.ToString(color.B, toBase) + " ";
+            result += "R:" + color.R + " G:" + color.G + " B:" + color.B;
+            return result;
+        }
+        private void RefreshUi()
+        {
+            canvas.Image = sketch.Paint();
+            lblSelectedColor.Text = ColorToString(sketch.CurrentTool.Color);
+        }
+        private void btnClear_Click(object sender, EventArgs e)
+        {
+            sketch.Clear();
+            RefreshUi();
+        }
+
+        private void nupPencilWidth_ValueChanged(object sender, EventArgs e)
+        {
+            sketch.ChangePaintToolWidth((int)nupPencilWidth.Value);
         }
     }
 }

Paint_2/PaintTool.cs

@@ -15,9 +15,10 @@ namespace Paint_2
         List<int> Widths { get; set; }
         int Width { get; set; }
 
-        void Start(Point point,Color color,int width);
+        void Start(Color color,int width);
         void Stop(Point point);
         void Add(Point point);
+        void Clear();
         List<Color> GetLastColors(int colorNumber); 
         void Paint(Bitmap canvas);
     }

Paint_2/Pencil.cs

@@ -52,16 +52,19 @@ namespace Paint_2
                 drawingCounter += 1;
             }
         }
-        public void Start(Point point, Color color, int width)
+        public void Start(Color color, int width)
         {
             Color = color;
             Width = width;
             List<Point> points = new List<Point>();
-            points.Add(point);
             Drawings.Add(points);
             Colors.Add(Color);
             Widths.Add(Width);
         }
+        public void Clear()
+        {
+            Drawings = new List<List<Point>>();
+        }
         public void Stop(Point point)
         {
             throw new NotImplementedException();
@@ -72,16 +75,20 @@ namespace Paint_2
             if (Colors.Count <= colorNumber)
             {
                 //We need to fill with black color
-                for (int i = colorNumber; i >= 0; i--)
+                for (int i = Colors.Count; i > 0; i--)
+                {
+                    result.Add(Colors[(Colors.Count) - i]);
+                }
+                for (int i = colorNumber - Colors.Count;i > 0; i--)
                 {
                     result.Add(Color.FromArgb(0x00,0x00,0x00));
                 }
             }
             else
             {
-                for(int i = colorNumber; i > 0; i--)
+                for (int i = colorNumber; i > 0; i--)
                 {
-                    result.Add(Colors[(Colors.Count)-i]);
+                    result.Add(Colors[(Colors.Count) - i]);
                 }
             }
             return result;

Paint_2/Sketch.cs

@@ -29,7 +29,8 @@ namespace Paint_2
             
             CurrentColor = Color.FromArgb(0xFF, 0xFF, 0xFF);
             IsDrawing = false;
-            Drawing = new Bitmap(sketchSize.Width, sketchSize.Height);
+            SketchSize = sketchSize;
+            Drawing = new Bitmap(SketchSize.Width, SketchSize.Height);
             ToolList = toolList;
             if (toolList[0] != null)
             {
@@ -46,7 +47,16 @@ namespace Paint_2
         }
         public void StartDrawing(Point location,Color color,int width)
         {
-            CurrentTool.Start(location,color,width);
+            CurrentTool.Start(color,width);
+            CurrentTool.Add(location);
+        }
+        public void ChangePaintToolColor(Color color)
+        {
+            CurrentTool.Start(color,CurrentTool.Width);
+        }
+        public void ChangePaintToolWidth(int width)
+        {
+            CurrentTool.Start(CurrentTool.Color,width);
         }
         public void StopDrawing(Point location)
         {
@@ -56,6 +66,14 @@ namespace Paint_2
         {
             CurrentTool.Add(location);
         }
+        public void Clear()
+        {
+            Drawing = new Bitmap(SketchSize.Width, SketchSize.Height);
+            foreach (PaintTool tool in ToolList)
+            {
+                tool.Clear();
+            }
+        }
         public Bitmap Paint() 
         {
             foreach (PaintTool tool in ToolList)