Merge remote-tracking branch 'origin/master'

Author: Spencer.Luo

advanced_pattern/MVC.py

@@ -0,0 +1,153 @@
+#!/usr/bin/python
+# Authoer: Spencer.Luo
+# Date: 12/08/2018
+
+# Version 1.0
+#=======================================================================================================================
+import random
+# 引入随机数模块
+
+class Camera:
+    """相机机身"""
+
+    # 对焦类型
+    SingleFocus = "单点对焦"
+    AreaFocus = "区域对焦"
+    BigAreaFocus = "大区域对焦"
+    Focus45 = "45点自动对焦"
+
+    def __init__(self, name):
+        self.__name = name
+        self.__aperture = 0.0       # 光圈
+        self.__shutterSpeed = 0     # 快门速度
+        self.__ligthSensitivity = 0 # 感光度
+        self.__lens = Lens()        # 镜头
+        self.__sdCard = SDCard()    # SD卡
+        self.__display = Display()  # 显示器
+
+    def shooting(self):
+        """拍照"""
+        print("[开始拍摄中")
+        imageLighting = self.__lens.collecting()
+        # 通过快门、光圈和感光度、测光来控制拍摄的过程，省略此部分
+        image = self.__transferImage(imageLighting)
+        self.__sdCard.addImage(image)
+        print("拍摄完成]")
+
+    def viewImage(self, index):
+        """查看图像"""
+        print("查看第%d张图像：" % (index + 1))
+        image = self.__sdCard.getImage(index)
+        self.__display.showImage(image)
+
+    def __transferImage(self, imageLighting):
+        """接收光线并处理成数字信号，简单模拟"""
+        print("接收光线并处理成数字信号")
+        return Image(6000, 4000, imageLighting)
+
+    def setting(self, aperture, shutterSpeed, ligthSensitivity):
+        """设置相机的拍摄属性：光圈、快门、感光度"""
+        self.__aperture = aperture
+        self.__shutterSpeed = shutterSpeed
+        self.__ligthSensitivity = ligthSensitivity
+
+    def focusing(self, focusMode):
+        """对焦，要通过镜头来调节焦点"""
+        self.__lens.setFocus(focusMode)
+
+    def showInfo(self):
+        """显示相机的属性"""
+        print("%s的设置   光圈：F%0.1f  快门：1/%d  感光度：ISO %d" %
+              (self.__name, self.__aperture, self.__shutterSpeed, self.__ligthSensitivity))
+
+
+class Lens:
+    """镜头"""
+
+    def __init__(self):
+        self.__focusMode = ''   # 对焦
+        self.__scenes = {0 : '风光', 1 : '生态', 2 : '人文', 3 : '纪实', 4 : '人像', 5 : '建筑'}
+
+    def setFocus(self, focusMode):
+        self.__focusMode = focusMode
+
+    def collecting(self):
+        """图像采集，采用随机的方式来模拟自然的拍摄过程"""
+        print("采集光线，%s" % self.__focusMode)
+        index = random.randint(0, len(self.__scenes)-1)
+        scens = self.__scenes[index]
+        return "美丽的 " + scens + " 图像"
+
+
+class Display:
+    """显示器"""
+
+    def showImage(self, image):
+        print("图片大小：%d x %d，  图片内容：%s" % (image.getWidth(), image.getHeight(), image.getPix()))
+
+
+class SDCard:
+    """SD存储卡"""
+
+    def __init__(self):
+        self.__images = []
+
+    def addImage(self, image):
+        print("存储图像")
+        self.__images.append(image)
+
+    def getImage(self, index):
+        if (index >= 0 and index < len(self.__images)):
+            return self.__images[index]
+        else:
+            return None
+
+
+class Image:
+    """图像(图片), 方便起见用字符串来代码图像的内容(像素)"""
+
+    def __init__(self, width, height, pixels):
+        self.__width = width
+        self.__height = height
+        self.__pixels = pixels
+
+    def getWidth(self):
+        return  self.__width
+
+    def getHeight(self):
+        return self.__height
+
+    def getPix(self):
+        return self.__pixels
+
+
+# Version 2.0
+#=======================================================================================================================
+# 代码框架
+#==============================
+
+# 基于框架的实现
+#==============================
+
+
+# Test
+#=======================================================================================================================
+def testCamera():
+    camera = Camera("EOS 80D")
+    camera.setting(3.5, 60, 200)
+    camera.showInfo()
+    camera.focusing(Camera.BigAreaFocus)
+    camera.shooting()
+    print()
+
+    camera.setting(5.6, 720, 100)
+    camera.showInfo()
+    camera.focusing(Camera.Focus45)
+    camera.shooting()
+    print()
+
+    camera.viewImage(0)
+    camera.viewImage(1)
+
+
+testCamera()