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fun/lib/ui/tk.fun
2025-12-23 23:19:20 +01:00

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Standard ML

#!/usr/bin/env fun
/*
* This file is part of the Fun programming language.
* https://fun-lang.xyz/
*
* Copyright 2025 Johannes Findeisen <you@hanez.org>
* Licensed under the terms of the Apache-2.0 license.
* https://opensource.org/license/apache-2-0
*
* Added: 2025-12-09
*/
// Tk stdlib helper wrapping the Tk VM builtins.
// No raw Tcl is exposed; this class provides a tiny, safe GUI surface.
class TK()
// Set the window title
fun title(this, title)
return tk_title(to_string(title))
// Create or update a label widget with id and text
fun label(this, id, text)
return tk_label(to_string(id), to_string(text))
// Create or update a button widget with id and text
fun button(this, id, text)
return tk_button(to_string(id), to_string(text))
// Pack a widget by id
fun pack(this, id)
return tk_pack(to_string(id))
// Create a listbox widget
fun listbox(this, id)
return tk_eval("listbox ." + to_string(id))
// Insert text into a widget (like listbox) at index
fun insert(this, id, index, text)
return tk_eval("." + to_string(id) + " insert " + to_string(index) + " {" + to_string(text) + "}")
// Clear a widget (like listbox)
fun clear(this, id)
return tk_eval("." + to_string(id) + " delete 0 end")
// Bind an event to a command
fun bind(this, id, event, cmd)
return tk_bind(to_string(id), to_string(event), to_string(cmd))
// Evaluate raw Tcl script
fun eval(this, script)
return tk_eval(to_string(script))
// Get last Tcl result
fun result(this)
return tk_result()
// Enter the Tk event loop (blocks until windows are closed)
fun loop(this)
return tk_loop()