Developer Pills

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 private void GenerateButtons(int rows, int columns)
        {
            //Resize panel
            panel.Height = columns * 70;
            panel.Width = rows * 70;

            //double loop to create buttoms and in the way they fill in coulmns and rows.
            for (int r = 0; r <= columns - 1; r++)//row variable
            {
                for (int c = 0; c <= rows - 1; c++)//coulmn variable
                {
                    Button temp = new Button();
                    temp.Height = temp.Width = 70;//set square dimentions for the buttom
                    temp.Location = new Point(c * temp.Width, r * temp.Height);
                    temp.Click += new EventHandler(ImagesOnClick); //Attach the handler for the click event.
                    temp.FlatStyle = FlatStyle.Popup;
                    ALAllImages.Add(temp);
                    ALImagesLocations.Add(temp.Location); //Add location on every buttons on specific array
                }
            }
            foreach (Button b in ALAllImages)
            {
                panel.Controls.Add(b); //Add buttons to the panel on the form.
            }
            //Assign the location of the last left cornerd buttom to the empty space.
            FreeSquare.X = panel.Controls[panel.Controls.Count - 1].Location.X;
            FreeSquare.Y = panel.Controls[panel.Controls.Count - 1].Location.Y;
            //Preserve the last left cornerd buttom for movment 
            panel.Controls.RemoveAt(panel.Controls.Count - 1);
            ALAllImages.RemoveAt(ALAllImages.Count - 1);
        }

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 private void PaintPuzzle(Bitmap UserInput, int rows, int columns)
        {
            //calculate area to pick color pixels
            ArrayList SmallPics = new ArrayList(rows * columns);
            int hp = 0;//lenth from the eadge of the panel
            int vp = 0;
            int x = 70;//dimention of the image
            int y = 70;
            for (int i = 0; i < (rows * columns); i++)
            {
                Bitmap b = new Bitmap(x, y);

                for (int n = 0; n < x; n++)
                {
                    for (int m = 0; m < y; m++) //creating small images 70*70 for every button.
                    {
                        int np = n + hp;
                        int mp = m + vp;
                        Color c = UserInput.GetPixel(np, mp);
                        b.SetPixel(n, m, c);
                    }
                }

                SmallPics.Add(b);

                hp += 70; // for the movment of coloring.
                if (hp >= rows * 70)
                { hp = 0; vp += 70; }
            }

            for (int i = 0; i < ALAllImages.Count; i++)
            {
                ((Button)ALAllImages[i]).Image = (Image)SmallPics[i];//bind the small images to each button
            }
        }

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private void ShuffleImages()
        {
            if (ALAllImages == null)
                return;
            Random factory = new Random();//create randome object
            Button crazyButton = new Button();
            int c = int.Parse(numericUpDown1.Value.ToString())*int.Parse(numericUpDown2.Value.ToString());
            for (int i = 0; i < 25*c; i++)//100 movment at most to be done.
            {
                crazyButton = (Button)ALAllImages[factory.Next(ALAllImages.Count)];//choose random button
                OneStep(crazyButton);//move the random button
            }
        }

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private void OneStep(Button ClickedButton)
        {
            //Make sure that the clicked buttom is near free space horizontally or vertically
            if (FreeSquare.Y == ClickedButton.Location.Y || FreeSquare.X == ClickedButton.Location.X)
            {
                //create a holder for the empty point which will change...
                Point freesquareHolder = new Point();
                freesquareHolder = ClickedButton.Location;

                //tow possible group of movments up&down , right&left
                //implementation for the movment vertically
                if (FreeSquare.X == ClickedButton.Location.X)
                {
                    foreach (Button b in panel.Controls)
                    {
                        if (((
                           b.Location.Y >= ClickedButton.Location.Y)
                           && (b.Location.Y < FreeSquare.Y)
                           && (b.Location.X == FreeSquare.X))
                           || ((b.Location.Y <= ClickedButton.Location.Y)
                           && (b.Location.Y > FreeSquare.Y)
                           && (b.Location.X == FreeSquare.X)))
                        {
                            if (ClickedButton.Location.Y > FreeSquare.Y
                                && ClickedButton.Location.X == FreeSquare.X)
                            {
                                b.Location = new Point(b.Location.X, b.Location.Y - b.Size.Height);// move up
                            }
                            if (ClickedButton.Location.Y < FreeSquare.Y
                                && ClickedButton.Location.X == FreeSquare.X)
                            {
                                b.Location = new Point(b.Location.X, b.Location.Y + b.Size.Height); //move down
                            }
                       }
                    }
                }

                //implementation for horizontal movment
                foreach (Button b in panel.Controls)
                {
                    if (((
                            b.Location.X >= ClickedButton.Location.X)
                            && (b.Location.X < FreeSquare.X)
                            && (b.Location.Y == FreeSquare.Y))
                            || ((b.Location.X <= ClickedButton.Location.X)
                            && (b.Location.X > FreeSquare.X)
                            && (b.Location.Y == FreeSquare.Y)))
                    {
                        if (ClickedButton.Location.X < FreeSquare.X
                            && ClickedButton.Location.Y == FreeSquare.Y)
                        {
                            b.Location = new Point(b.Location.X + b.Size.Width, b.Location.Y);//move right
                        }
                        if (ClickedButton.Location.X > FreeSquare.X
                            && ClickedButton.Location.Y == FreeSquare.Y)
                        {
                            b.Location = new Point(b.Location.X - b.Size.Width, b.Location.Y);//move left
                        }
                    }

                }

                FreeSquare = freesquareHolder;//return the original coordinate for the empty space
            }
        }