《实验4设计模式》PPT课件.ppt

实验4 设计模式 抽象工厂模式,要求,本周日最后一次实验时（12月23号晚18:0022:00），前三次未交作业的同学将作业补交。 本次实验为选做实验，设计模式的内容请大家自学。,抽象工厂模式结构图,实验目的：1. 理解抽象工厂设计模式的含义 2. 练习抽象工厂模式的实现 3.掌握学习设计模式的一般方法,问题,编写一个程序来完成花园的规划，花园可能是季生植物型花园、蔬菜型花园或多年生植物型花园。要解决的问题： 边缘种植什么植物 中央种植什么植物 阴凉部分种植什么 （用一个图片框来模拟，在一个图片框中的相应位置处标出植物类型，灰色的圆表示阴凉部分。） 以下是以C语言给出的各参考类和运行结果。请实现这一程序，并分析抽象工厂模式的应用情况，使用的程序设计语言不限。,using System; using System.Drawing ; namespace Gardener / / Summary description for Garden. / 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; /draw each plant 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); ,Plant对象设置植物名字，并绘制自己,using System; using System.Drawing; namespace Gardener / / Summary description for Plant. / public class Plant private string name; private Brush br; private Font font; public Plant(string pname) name = pname; /save name font = new Font (“Arial“, 12); br = new SolidBrush (Color.Black ); /- public void draw(Graphics g, int x, int y) g.DrawString (name, font, br, x, y); ,季生植物型花园,using System; using System.Drawing ; namespace Gardener / / Summary description for AnnualGarden. / public class AnnualGarden : Garden public AnnualGarden () shade = new Plant(“Coleus“); border = new Plant (“Alyssum“); center = new Plant (“Marigold“); ,蔬菜型花园,using System; namespace Gardener / / Summary description for VeggieGarden. / public class VeggieGarden : Garden public VeggieGarden() shade = new Plant(“Broccoli“); border = new Plant (“Peas“); center = new Plant (“Corn“); ,多年生植物型花园,using System; namespace Gardener / / Summary description for PerennialGarden. / public class PerennialGarden : Garden public PerennialGarden() shade = new Plant(“Astilbe“); border = new Plant (“Dicentrum“); center = new Plant (“Sedum“); ,用户界面Form,用户界面单选按钮,private void opAnnual_CheckedChanged(object sender, EventArgs e) setGarden( new AnnualGarden (); /- private void opVegetable_CheckedChanged(object sender, EventArgs e) setGarden( new VeggieGarden (); /- private void opPerennial_CheckedChanged(object sender, EventArgs e) setGarden( new PerennialGarden (); /- 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 ,用户界面复选框,private void ckCenter_CheckedChanged(object sender, System.EventArgs e) garden.setCenter (); gdPic1.Refresh (); /- private void ckBorder_CheckedChanged(object sender, System.EventArgs e) garden.setBorder(); gdPic1.Refresh (); /- private void ckShade_CheckedChanged(object sender, System.EventArgs e) garden.setShade (); gdPic1.Refresh (); ,图片框（PictureBox）,using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; using System.Windows.Forms; namespace Gardener / / Summary description for GdPic. / public class GdPic : System.Windows.Forms.PictureBox / / Required designer variable. / private System.ComponentModel.Container components = null; private Brush br; private Garden gden; private void init () br = new SolidBrush (Color.LightGray ); public GdPic() / This call is required by the Windows.Forms Form Designer. InitializeComponent(); init(); public void setGarden(Garden garden) gden = garden; protected override void OnPaint ( PaintEventArgs pe ) Graphics g = pe.Graphics; g.FillEllipse (br, 5, 5, 100, 100); if(gden != null) gden.draw (g); ,图片框（PictureBox）（续）,/ / Clean up any resources being used. / protected override void Dispose( bool disposing ) if( disposing ) if(components != null) components.Dispose(); base.Dispose( disposing ); #region Component Designer generated code / / Req