使用 tkinter 版本8.6 来写一个bmp图片展示窗(允许滚动条上下左右滚动查看大图片),另点击展示窗中的图片时显示点击的坐标demo

以下是使用 tkinter 版本 8.6 编写的 BMP 图片展示窗的 demo。

import tkinter as tk
from tkinter import filedialog


class BMPViewer(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.master = master
        self.init_ui()

    def init_ui(self):
        self.master.title('BMP Viewer')
        self.grid(sticky="NSEW")

        # 创建菜单
        menubar = tk.Menu(self.master)
        file_menu = tk.Menu(menubar, tearoff=0)
        file_menu.add_command(label="打开", command=self.open_file)
        menubar.add_cascade(label="文件", menu=file_menu)
        self.master.config(menu=menubar)

        # 创建滚动条
        self.vbar = tk.Scrollbar(self.master, orient=tk.VERTICAL)
        self.hbar = tk.Scrollbar(self.master, orient=tk.HORIZONTAL)
        self.vbar.grid(row=0, column=1, sticky="NS")
        self.hbar.grid(row=1, column=0, sticky="EW")

        # 创建图片展示窗口
        self.canvas = tk.Canvas(self.master, width=400, height=300, bd=0,
                                xscrollcommand=self.hbar.set, yscrollcommand=self.vbar.set)
        self.canvas.grid(row=0, column=0, sticky="NSEW")
        self.canvas.bind("<Button-1>", self.show_click_position)

        self.master.grid_rowconfigure(0, weight=1)
        self.master.grid_columnconfigure(0, weight=1)

    def open_file(self):
        file_path = filedialog.askopenfilename(title="选择BMP文件",
                                               filetypes=(("BMP文件", "*.bmp"), ("All Files", "*.*")))
        if file_path:
            self.load_image(file_path)

    def load_image(self, file_path):
        # 从 BMP 文件加载图像并显示
        with open(file_path, 'rb') as f:
            header = f.read(54)
            width = int.from_bytes(header[18:22], byteorder='little')
            height = int.from_bytes(header[22:26], byteorder='little')
            bits_per_pixel = int.from_bytes(header[28:30], byteorder='little')
            image_data = f.read()

        self.image = tk.PhotoImage(data=image_data)
        self.canvas.config(scrollregion=(0, 0, width, height))
        self.canvas.create_image(0, 0, image=self.image, anchor=tk.NW)

        # 设置滚动条的范围和步进
        self.vbar.config(command=self.canvas.yview, from_=0, to=height)
        self.hbar.config(command=self.canvas.xview, from_=0, to=width)

    def show_click_position(self, event):
        x, y = self.canvas.canvasx(event.x), self.canvas.canvasy(event.y)
        print("点击位置坐标: ({}, {})".format(int(x), int(y)))


if __name__ == '__main__':
    root = tk.Tk()
    app = BMPViewer(root)
    app.mainloop()

运行该程序后，可以通过“文件”菜单打开 BMP 图像文件，展示窗口支持滚动条上下左右滚动查看大图片。

展示窗口中的图像支持点击，并在控制台输出点击位置的坐标。

下面是示例截图：