Question

我想我理解模型/视图控制器方法中编码背后的基本思想。这样做是为了隔离程序的某些区域，这样如果有人访问程序的一部分，它们就不会自动访问所有数据。但有人能为我提供一个如何使用MVC制作GUI的示例吗？这是一个示例GUI。如何将其转换为MVC GUI？

from tkinter import *

class Application(Frame):
    """ GUI application that creates a story based on user input. """
    def __init__(self, master):
        """ Initialize Frame. """
        super(Application, self).__init__(master)  
        self.grid()
        self.create_widgets()

    def create_widgets(self):
        """ Create widgets to get story information and to display story. """
        # create instruction label
        Label(self,
              text = "Enter information for a new story"
              ).grid(row = 0, column = 0, columnspan = 2, sticky = W)

        # create a label and text entry for the name of a person
        Label(self,
              text = "Person: "
              ).grid(row = 1, column = 0, sticky = W)
        self.person_ent = Entry(self)
        self.person_ent.grid(row = 1, column = 1, sticky = W)

        # create a label and text entry for a plural noun
        Label(self,
              text = "Plural Noun:"
              ).grid(row = 2, column = 0, sticky = W)
        self.noun_ent = Entry(self)
        self.noun_ent.grid(row = 2, column = 1, sticky = W)

        # create a label and text entry for a verb
        Label(self,
              text = "Verb:"
              ).grid(row = 3, column = 0, sticky = W)
        self.verb_ent = Entry(self)
        self.verb_ent.grid(row = 3, column = 1, sticky = W)

        # create a label for adjectives check buttons
        Label(self,
              text = "Adjective(s):"
              ).grid(row = 4, column = 0, sticky = W)

        # create itchy check button
        self.is_itchy = BooleanVar()
        Checkbutton(self,
                    text = "itchy",
                    variable = self.is_itchy
                    ).grid(row = 4, column = 1, sticky = W)

        # create joyous check button
        self.is_joyous = BooleanVar()
        Checkbutton(self,
                    text = "joyous",
                    variable = self.is_joyous
                    ).grid(row = 4, column = 2, sticky = W)

        # create electric check button
        self.is_electric = BooleanVar()
        Checkbutton(self,
                    text = "electric",
                    variable = self.is_electric
                    ).grid(row = 4, column = 3, sticky = W)

        # create a label for body parts radio buttons
        Label(self,
              text = "Body Part:"
              ).grid(row = 5, column = 0, sticky = W)

        # create variable for single, body part
        self.body_part = StringVar()
        self.body_part.set(None)

        # create body part radio buttons
        body_parts = ["bellybutton", "big toe", "medulla oblongata"]
        column = 1
        for part in body_parts:
            Radiobutton(self,
                        text = part,
                        variable = self.body_part,
                        value = part
                        ).grid(row = 5, column = column, sticky = W)
            column += 1

        # create a submit button
        Button(self,
               text = "Click for story",
               command = self.tell_story
               ).grid(row = 6, column = 0, sticky = W)

        self.story_txt = Text(self, width = 75, height = 10, wrap = WORD)
        self.story_txt.grid(row = 7, column = 0, columnspan = 4)

    def tell_story(self):
        """ Fill text box with new story based on user input. """
        # get values from the GUI
        person = self.person_ent.get()
        noun = self.noun_ent.get()
        verb = self.verb_ent.get()
        adjectives = ""
        if self.is_itchy.get():
            adjectives += "itchy, "
        if self.is_joyous.get():
            adjectives += "joyous, "
        if self.is_electric.get():
            adjectives += "electric, "
        body_part = self.body_part.get()

        # create the story
        story = "The famous explorer "
        story += person
        story += " had nearly given up a life-long quest to find The Lost City of "
        story += noun.title()
        story += " when one day, the "
        story += noun
        story += " found "
        story += person + ". "
        story += "A strong, "
        story += adjectives
        story += "peculiar feeling overwhelmed the explorer. "
        story += "After all this time, the quest was finally over. A tear came to "
        story += person + "'s "
        story += body_part + ". "
        story += "And then, the "
        story += noun
        story += " promptly devoured "
        story += person + ". "
        story += "The moral of the story? Be careful what you "
        story += verb
        story += " for."

        # display the story                                
        self.story_txt.delete(0.0, END)
        self.story_txt.insert(0.0, story)

# main
def main():
    root = Tk()
    root.title("Mad Lib")
    app = Application(root)
    root.mainloop()

main()

Answer 1

我只使用过一次tkinter，所以这看起来很通用。

您的应用程序可能具有故事模型和故事视图似乎是合乎逻辑的。

所有故事逻辑都可以包含在故事模型中。故事模型可能负责绘制故事视图（所有故事小部件）

我认为重要的是要认识到，您的Application课程可能不适合包含您的故事逻辑。即使你的tkinter应用程序必须有一个入口点，Application类也可能不能最好地代表你的数据。

在上面的建议中，应用程序仍可以作为控制器运行，它可以负责实例化你的故事模型

将MVC应用到您的应用可能有多种方法，所以请不要将我的建议视为唯一的方法

有人能为我提供Python中的MVC编码示例吗？

1 个答案: