Csharp: Abstract Factory Pattern

 

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/// <summary>    /// Summary description for Garden.    /// Abstract Factory Patterns    /// geovindu,Geovin Du,涂聚文    /// </summary>    public class Garden    {        protected Plant center, shade, border;        protected bool showCenter, showShade, showBorder;        //select which ones to display        public void setCenter() { showCenter = true; }        public void setBorder() { showBorder = true; }        public void setShade() { showShade = true; }        /// <summary>        /// draw each plant        /// </summary>        /// <param name="g"></param>        public void draw(Graphics g)        {            if (showCenter) center.draw(g, 100, 100);            if (showShade) shade.draw(g, 10, 50);            if (showBorder) border.draw(g, 50, 150);        }    }

　　

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/// <summary>    /// Summary description for Plant.    /// Abstract Factory Patterns    /// geovindu,Geovin Du,涂聚文    /// </summary>    public class Plant    {        private string name;        private Brush br;        private Font font;        /// <summary>        ///        /// </summary>        /// <param name="pname"></param>        public Plant(string pname)        {            name = pname;     //save name            font = new Font("Arial", 12);            br = new SolidBrush(Color.Black);        }        /// <summary>        ///        /// </summary>        /// <param name="g"></param>        /// <param name="x"></param>        /// <param name="y"></param>        public void draw(Graphics g, int x, int y)        {            g.DrawString(name, font, br, x, y);        }    }

　　

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/// <summary> /// Summary description for AnnualGarden. /// Abstract Factory Patterns /// geovindu,Geovin Du,涂聚文 /// </summary> public class AnnualGarden : Garden {       /// <summary>     ///     /// </summary>     public AnnualGarden()     {         shade = new Plant("Coleus");         border = new Plant("Alyssum");         center = new Plant("Marigold");     } }

　　

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/// <summary> /// Summary description for VeggieGarden. /// Abstract Factory Patterns /// geovindu,Geovin Du,涂聚文 /// </summary> public class VeggieGarden : Garden {     public VeggieGarden()     {         shade = new Plant("Broccoli");         border = new Plant("Peas");         center = new Plant("Corn");     } }

　　

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/// <summary> /// Summary description for PerennialGarden. /// Abstract Factory Patterns /// geovindu,Geovin Du,涂聚文 /// </summary> public class PerennialGarden : Garden {     public PerennialGarden()     {         shade = new Plant("Astilbe");         border = new Plant("Dicentrum");         center = new Plant("Sedum");     } }

　　

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/// <summary>     /// Abstract Factory Patterns     /// geovindu,Geovin Du,涂聚文     /// </summary>     public partial class GdPic : System.Windows.Forms.PictureBox     {              private Brush br;         private Garden gden;           /// <summary>         ///         /// </summary>         private void init()         {             br = new SolidBrush(Color.LightGray);         }         /// <summary>         ///         /// </summary>         public GdPic()         {             InitializeComponent();             init();         }         /// <summary>         ///         /// </summary>         /// <param name="garden"></param>         public void setGarden(Garden garden)         {             gden = garden;         }           /// <summary>         ///         /// </summary>         /// <param name="pe"></param>         protected override void OnPaint(PaintEventArgs pe)         {             Graphics g = pe.Graphics;             g.FillEllipse(br, 5, 5, 100, 100);             if (gden != null)                 gden.draw(g);         }           }

　窗體調用:

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/// <summary>    /// Abstract Factory Patterns    /// geovindu,Geovin Du,涂聚文    /// </summary>    public partial class AbstractFactoryForm : Form    {          private Garden garden;        /// <summary>        ///        /// </summary>        public AbstractFactoryForm()        {            InitializeComponent();                   }        /// <summary>        ///        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void AbstractFactoryForm_Load(object sender, EventArgs e)        {          }        /// <summary>        ///        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void ckCenter_CheckedChanged(object sender, EventArgs e)        {            garden.setCenter();            gdPic1.Refresh();        }        /// <summary>        ///        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void ckBorder_CheckedChanged(object sender, EventArgs e)        {            garden.setBorder();            gdPic1.Refresh();        }        /// <summary>        ///        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void ckShade_CheckedChanged(object sender, EventArgs e)        {            garden.setShade();            gdPic1.Refresh();        }        /// <summary>        ///        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void opAnnual_CheckedChanged(object sender, EventArgs e)        {            setGarden(new AnnualGarden());        }        /// <summary>        ///        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void opVegetable_CheckedChanged(object sender, EventArgs e)        {            setGarden(new VeggieGarden());        }        /// <summary>        ///        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void opPerennial_CheckedChanged(object sender, EventArgs e)        {            setGarden(new PerennialGarden());        }        /// <summary>        ///        /// </summary>        /// <param name="gd"></param>        private void setGarden(Garden gd)        {            garden = gd;            //save current garden            gdPic1.setGarden(gd);   //tell picture bos            gdPic1.Refresh();       //repaint it            ckCenter.Checked = false;   //clear all            ckBorder.Checked = false;   //check            ckShade.Checked = false;    //boxes        }    }