Tkinter - 使用绑定动态调整框架大小 [英] Tkinter - Using bind to resize frame dynamically

问题描述

我正在尝试创建一个 GUI 前端来使用 python tkinter 显示一些数据.

I am trying to create a GUI front-end to display some data using python tkinter.

我有一个框架，它又包含其他小部件，例如按钮和列表框等.每当光标放置在框架的边界上时，我都会尝试动态增加/减少框架，就像我们在用户端的通常窗口上所做的一样.

I have a Frame which in-turn has other widgets like, button and list-box etc. I am trying to dynamically increase/decrease the frame whenever the cursor is placed on borders of frame just like we do on usual windows from user end.

我已经完成了相同的绑定函数.但看起来我错过了什么.

I have gone through the binding functions for the same. but looks like I am missing on something.

  def left_click(event):
      tkinter.Label(Frame1, text = "Left Click!").pack()



  self.Frame1 = Frame(top)        
  self.Frame1.place(relx=0.01, rely=0.152, relheight=0.678 , relwidth=0.98)
  self.Frame1.configure(relief=GROOVE)
  self.Frame1.configure(borderwidth="10")
  self.Frame1.configure(relief=GROOVE)
  self.Frame1.configure(background="#D1C8E6")
  self.Frame1.configure(width=900)
  self.Frame1.configure(highlightthickness="4")
  self.Frame1.bind("<Button-1>", left_click)

我是 python tk inter 的新手.

I am new to python tk inter.

推荐答案

需要绑定以下鼠标事件来进行frame resize:

You need to bind the following mouse events to perform frame resize:

• (鼠标左键按下)根据鼠标位置决定是否开始调整大小
• (松开鼠标左键)停止调整大小
• (鼠标在帧内移动)如果通过按下鼠标开始调整大小，则执行调整大小

• <ButtonPress-1> (mouse left button pressed) to determine whether resize should be started based on mouse position
• <ButtonRelease-1> (mouse left button released) to stop resize
• <Motion> (mouse moving within frame) to perform resize if resize is started by mouse pressed

以下是示例代码:

from tkinter import *

HORIZONTAL = 1
VERTICAL   = 2

class App:
    def __init__(self, top):
        self.Frame1 = Frame(top, bd=5, relief='raised', width=100, height=100)
        self.Frame1.place(x=10, y=10)
        self.Frame1.bind("<ButtonPress-1>", self.start_resize)
        self.Frame1.bind("<ButtonRelease-1>", self.stop_resize)
        self.Frame1.bind("<Motion>", self.resize_frame)
        self.resize_mode = 0
        self.cursor = ''

    def check_resize_mode(self, x, y):
        width, height = self.Frame1.cget('width'), self.Frame1.cget('height')
        mode = 0
        if x > width-10: mode |= HORIZONTAL    
        if y > height-10: mode |= VERTICAL
        return mode

    def start_resize(self, event):
        self.resize_mode = self.check_resize_mode(event.x, event.y)

    def resize_frame(self, event):
        if self.resize_mode:
            if self.resize_mode & HORIZONTAL:
                self.Frame1.config(width=event.x)
            if self.resize_mode & VERTICAL:
                self.Frame1.config(height=event.y)
        else:
            cursor = 'size' if self.check_resize_mode(event.x, event.y) else ''
            if cursor != self.cursor:
                self.Frame1.config(cursor=cursor)
                self.cursor = cursor

    def stop_resize(self, event):
        self.resize_mode = 0

root = Tk()
root.geometry("800x600+400+50")
App(root)
root.mainloop()

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