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Resizing Tkinter Text widgets by exact pixels
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| import contextlib | |
| from tkinter import IntVar, TclError, Text, Tk | |
| from tkinter.ttk import Entry, Frame | |
| app = Tk() | |
| app.title("Resizable Text") | |
| app.geometry("500x300") | |
| app.grid_columnconfigure(0, weight=1) | |
| app.grid_rowconfigure(0, weight=1) | |
| # This frame will be centered with above weights. | |
| # No sticky= needed; we will adjust the width/height as desired. | |
| text_frame = Frame(app, width=400, height=200) | |
| text_frame.grid() | |
| # This is the text widget we want to resize by pixels. | |
| text = Text(text_frame, font="TkDefaultFont") | |
| text.insert("1.0", "Hello world!") | |
| text.grid(sticky="nesw") | |
| # IMPORTANT: | |
| # Allow Text to expand, and disable the frame's grid propagation. | |
| # This makes the frame ignore the requested size of its children, | |
| # cropping them out of the frame if necessary. | |
| # | |
| # As a result, Text will always resize to fill its parent frame. | |
| # | |
| # This can also be done with pack using .pack_propagate(False). | |
| text_frame.grid_columnconfigure(0, weight=1) | |
| text_frame.grid_rowconfigure(0, weight=1) | |
| text_frame.grid_propagate(False) | |
| # Define our controls to set the text frame's size. | |
| size_controls = Frame(app) | |
| size_controls.grid(row=1, column=0, sticky="e") | |
| width_var = IntVar(app, value=text_frame["width"]) | |
| height_var = IntVar(app, value=text_frame["height"]) | |
| width_entry = Entry(size_controls, width=10, textvariable=width_var) | |
| width_entry.grid(row=0, column=0) | |
| height_entry = Entry(size_controls, width=10, textvariable=height_var) | |
| height_entry.grid(row=0, column=1) | |
| # A bit overly-engineered real-time resizing | |
| def on_width_write(name1: str, name2: str, op: str) -> None: | |
| with contextlib.suppress(TclError): | |
| width = width_var.get() | |
| width = min(max(width, 50), 1000) | |
| text_frame.configure(width=width) | |
| def on_height_write(name1: str, name2: str, op: str) -> None: | |
| with contextlib.suppress(TclError): | |
| height = height_var.get() | |
| height = min(max(height, 50), 1000) | |
| text_frame.configure(height=height) | |
| width_var.trace_add("write", on_width_write) | |
| height_var.trace_add("write", on_height_write) | |
| app.mainloop() |
Author
thegamecracks
commented
Aug 30, 2024
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