tkinter - 调整文本部件的大小（文本部件的sizegrip）

Question

我的目标是拥有一个“sizegrip部件”，使用户可以调整文本部件的大小。

图片来说明：（我很抱歉的坏网格）

是否有可能使sizegrip控件调整文本窗口小部件，而不是根窗口？

任何可以替代我的需求的替代部件？

Answer 1

如果您确实想要这样做，请使用place来管理包含文本窗口小部件，滚动条和sizegrip的框架。如果您删除了默认绑定并为sizegrip提供了新绑定，那么您可以防止它更改顶层几何并使其执行其他操作。 请注意，一个或两个窗格是这种事情更正常的UI设计。

import sys 
import tkinter as tk 
import tkinter.ttk as ttk 

class App(ttk.Frame): 
    def __init__(self, parent, title=None): 
     super().__init__(parent) 
     parent.wm_geometry("600x400") 
     parent.wm_title(title) 
     self.top = tk.Frame(self, height=100, background="green4") 
     self.middle = tk.Frame(self, background="red4") 
     self.lower = tk.Frame(self, height=100, background="blue4") 

     self.textframe = ttk.Frame(self.middle) 
     self.text = tk.Text(self.textframe) 
     self.vs = ttk.Scrollbar(self.textframe, 
           command=self.text.yview) 
     self.sg = ttk.Sizegrip(self.textframe) 
     self.text.configure(yscrollcommand=self.vs.set) 
     self.text.grid(row=0, column=0, sticky="news") 
     self.vs.grid(row=0, column=1, sticky="news") 
     self.sg.grid(row=1, column=1, sticky="sew") 
     self.textframe.grid_rowconfigure(0, weight=1) 
     self.textframe.grid_columnconfigure(0, weight=1) 
     self.middle.bind('<Map>', self.Place) 

     self.sg.bindtags((self.sg, '.','all')) 
     self.sg.bind('<Button-1>', self.Press) 
     self.sg.bind('<B1-Motion>', self.Drag) 
     self.sg.bind('<ButtonRelease-1>', self.Release) 

     self.top.grid(row=0, column=0, sticky="news") 
     self.middle.grid(row=1, column=0, sticky="news") 
     self.lower.grid(row=2, column=0, sticky="news") 
     self.grid_rowconfigure(1, weight=1) 
     self.grid_columnconfigure(0, weight=1) 
     self.grid(row=0,column=0, sticky="news") 
     parent.grid_rowconfigure(0, weight=1) 
     parent.grid_columnconfigure(0, weight=1) 

    def Press(self, ev): 
     self.dragging=True 
     self.dragpos = (ev.x_root, ev.y_root) 

    def Drag(self, ev): 
     if self.dragging: 
      dx = ev.x_root - self.dragpos[0] 
      dy = ev.y_root - self.dragpos[1] 
      sgx = self.sg.winfo_x() + dx 
      sgy = self.sg.winfo_y() + dy 
      sgw = self.sg.winfo_reqwidth() 
      sgh = self.sg.winfo_reqheight() 
      max_w = self.middle.winfo_width() - sgw 
      max_h = self.middle.winfo_height() - sgh 
      if sgx < 0 or sgx > max_w or sgy < 0 or sgy > max_h: 
       return 
      self.textframe.place(x=0, y=0, 
          width=sgx+sgw, height=sgy+sgh) 
      self.dragpos = (ev.x_root, ev.y_root) 

    def Release(self, ev): 
     self.dragging=False 

    def Place(self, ev): 
     """Place the text widget controls once the rest of the 
     application has been mapped so we actually have a size 
     to work from. 
     Reset the Map event to avoid re-calling this code.""" 
     self.textframe.bind('<Map>', None) 
     self.textframe.place(x=0, y=0, 
          width=self.middle.winfo_width(), 
          height=self.middle.winfo_height()) 

def main(args=None): 
    root = tk.Tk() 
    app = App(root, "Sizegrip demo") 
    root.mainloop() 
    return 0 

if __name__ == '__main__': 
    sys.exit(main(sys.argv[1:])) 

结果：