上一篇製作簡易相簿只能算是半成品，因為還少了載入資料夾的按鍵。

實際上載入圖片資料夾的功能已經寫在上面模組裡面了，layout上的按鍵我沒有寫在模組上，寫在主程式面板上，切換(switch)四個不同資料夾的radiobutton也是寫在主程式面板上。

其實我的目標是想完成以下的功能，一個版面同時可以撥放四個資料夾:

在面板上施作物鍵配置時，我使用grid方法。

def init_ImgViewer(self):
    self.init_ImgViewer_tab = tk.Frame(self.notebook)
    self.init_ImgViewer_tab.pack(side = tk.LEFT, expand=tk.YES, fill=tk.BOTH)
    self.notebook.add(self.init_ImgViewer_tab, text="init_ImgViewer")
    self.ImgSwitch = tk.StringVar()
    

Channel 1:

    ivfram1 = tk.Frame(self.init_ImgViewer_tab )
    ivfram1.grid(row =0, column = 0, sticky = tk.E+tk.W)
    self.iv1 = IV.ImageViewer(ivfram1)
    ivfram1_2 = tk.Frame(self.init_ImgViewer_tab )
    ivfram1_2.grid(row =0, column = 1, sticky = tk.E+tk.W)
    opendir1 = tk.Button(ivfram1_2, 
                         text = "Open\n dir 1",
                         font=('Courier', 9),
                         command = self.iv1.open_dir)
    opendir1.pack(side=tk.TOP, expand=tk.YES, fill = tk.X)
    switch1 = tk.Radiobutton(ivfram1_2,
                             text = "Img\n Switch 1",
                             font=('Courier', 9),
                             variable = self.ImgSwitch,
                             value = "Img Switch 1",
                             command = self.imgswitch)
    switch1.pack(side=tk.TOP, expand=tk.YES, fill = tk.X)

Channel 3:

    ivfram3 = tk.Frame(self.init_ImgViewer_tab )
    ivfram3.grid(row =0, column = 2, sticky = tk.E+tk.W)
    self.iv3 = IV.ImageViewer(ivfram3)
    ivfram3_2 = tk.Frame(self.init_ImgViewer_tab )
    ivfram3_2.grid(row =0, column = 3, sticky = tk.E+tk.W)
    opendir3 = tk.Button(ivfram3_2,
                         text = "Open\n dir 3",
                         font=('Courier', 9),
                         command = self.iv3.open_dir)
    opendir3.pack(side=tk.TOP, expand=tk.NO, fill = tk.X)
    switch3 = tk.Radiobutton(ivfram3_2, 
                             text = "Img\n Switch 3",
                             font=('Courier', 9), 
                             variable = self.ImgSwitch, 
                             value = "Img Switch 3",
                             command = self.imgswitch)
    switch3.pack(side=tk.TOP, expand=tk.YES, fill = tk.X)

Channel 2:

    ivfram2 = tk.Frame(self.init_ImgViewer_tab )
    ivfram2.grid(row =1, column = 0, sticky = tk.E+tk.W)
    self.iv2 = IV.ImageViewer(ivfram2)
    ivfram2_2 = tk.Frame(self.init_ImgViewer_tab )
    ivfram2_2.grid(row =1, column = 1, sticky = tk.E+tk.W)
    opendir2 = tk.Button(ivfram2_2,
                         text = "Open\n dir 2",
                         font=('Courier', 9),
                         command = self.iv2.open_dir)
    opendir2.pack(side=tk.TOP, expand=tk.YES, fill = tk.X)
    switch2 = tk.Radiobutton(ivfram2_2,
                             text = "Img\n Switch 2",
                             font=('Courier', 9),
                             variable = self.ImgSwitch,
                             value = "Img Switch 2",
                             command = self.imgswitch)
    switch2.pack(side=tk.TOP, expand=tk.YES, fill = tk.X)

Channel 4:

    ivfram4 = tk.Frame(self.init_ImgViewer_tab )
    ivfram4.grid(row =1, column = 2, sticky = tk.E+tk.W)
    self.iv4 = IV.ImageViewer(ivfram4)
    ivfram4_2 = tk.Frame(self.init_ImgViewer_tab )
    ivfram4_2.grid(row =1, column = 3, sticky = tk.E+tk.W)
    opendir1 = tk.Button(ivfram4_2,
                         text = "Open\n dir 4",
                         font=('Courier', 9),
                         command = self.iv4.open_dir)
    opendir1.pack(side=tk.TOP, expand=tk.YES, fill = tk.X)
    switch4 = tk.Radiobutton(ivfram4_2,
                             text = "Img\n Switch 4",
                             font=('Courier', 9),
                             variable = self.ImgSwitch,
                             value = "Img switch 4",
                             command = self.imgswitch)
    switch4.pack(side=tk.TOP, expand=tk.YES, fill = tk.X)

切換功能(switch):

def imgswitch(self):
    if self.ImgSwitch.get() =="Img Switch 1":
        imageFile = self.iv1.image_paths[self.iv1.image_idx]
    elif self.ImgSwitch.get() =="Img Switch 2":
        imageFile = self.iv2.image_paths[self.iv2.image_idx]
    elif self.ImgSwitch.get() =="Img Switch 3":
        imageFile = self.iv3.image_paths[self.iv3.image_idx]
    elif self.ImgSwitch.get() =="Img Switch 4":
        imageFile = self.iv4.image_paths[self.iv4.image_idx]

imageFile的功能像是一個指標，指標指向切換到該channel內部的image_idx變數，這樣做的原因是因應將來切換資料夾的功能可以串接到不同圖像偵測應用程式。