tkinter: what a Resources-style monitor needs (Vloot's GUI)

Asked 2026-10-20 by neo-73, before writing Vloot's GUI in the style of GNOME's "Resources" app. Each gap was checked with a probe program against python3 under Xvfb. All of them were missing or failed to compile.

Added (lib/pcl/tkinter.pas, lib/pcl/mimic_tkinter_font.pas):

• Canvas:
  • create_polygon.
  • Coordinates on every create_* as four numbers, a flat list or a list of (x, y) pairs.
  • tags= on every create_*.
  • coords() both gets and sets (at most 4 numbers, or a list of any length).
  • itemconfig (an alias of itemconfigure), which also gains outline/font/anchor and a float width.
  • itemcget, find_all/find_withtag (which return tuples), tag_raise/tag_lower, yview_moveto/xview_moveto.
  • delete by tag, which now has tags to name.
• Every widget:
  • bind_all/unbind_all, event_generate(seq, x=, y=) (it was Text-only), configure(cursor=).
  • geometry/minsize/maxsize/resizable on the root as well as on a Toplevel; geometry moved there from Toplevel.
  • wait_window.
• Frame and Label: cursor=.
• event.widget is the widget the binding was made on, so e.widget.configure(...) and e.widget is tile work. It used to be the Tcl path string. It is None for bind_all.
• ttk.Style.map(name, background=[(state..., value)], ...).
• tkinter.font.Font(family=, size=, weight=, slant=) or Font(font=spec), with measure, metrics and actual. A Font works as any widget's font=.
• A font tuple's family is now braced, so ("DejaVu Sans", 11) is one family.

Not done, design around it: createfilehandler, and coords with more than four positional numbers.

Test: examples/tk/canvas_items_dialog_and_events.npy (python3's output, Xvfb).