[Feature Request] Nemo Add “Open With” Search Filter For Programs

[PurpleSmurf2]

Just a quick suggestion: When you open a file using “Open With” and select “Choose Another App,” a long list appears if you have many programs installed, and you have to choose from that list. Instead of scrolling endlessly until you find the entry you want, I’d like to see a bar with a search filter that displays only the relevant results as you type.

I've put together a rough draft of how I envision the whole thing in a small Python program.

import tkinter as tk
from tkinter import ttk, messagebox

# Example programs (30 entries)
PROGRAMS = [
    "Firefox", "VLC Media Player", "GIMP", "LibreOffice Writer", "LibreOffice Calc",
    "Thunderbird", "Evolution", "Chromium", "Transmission", "Deluge",
    "Krita", "Inkscape", "Blender", "Audacity", "OBS Studio",
    "Visual Studio Code", "Sublime Text", "Atom", "PyCharm", "Geany",
    "FileZilla", "KeePassXC", "Nextcloud Client", "Dropbox", "Steam",
    "Signal", "Slack", "Discord", "TeamViewer", "VirtualBox"
]

class App(tk.Tk):
    def __init__(self):
        super().__init__()
        self.title("Program Selection")
        self.geometry("500x450")
        self.resizable(False, False)

        self.search_var = tk.StringVar()
        self.selected = []

        self.create_widgets()
        self.populate_list()

    def create_widgets(self):
        # Search bar
        search_frame = ttk.Frame(self)
        search_frame.pack(fill="x", padx=10, pady=10)

        ttk.Label(search_frame, text="Search:").pack(side="left")
        search_entry = ttk.Entry(search_frame, textvariable=self.search_var)
        search_entry.pack(side="left", fill="x", expand=True, padx=(6, 6))
        search_entry.bind("<KeyRelease>", self.on_search)

        clear_btn = ttk.Button(search_frame, text="Clear", command=self.clear_search)
        clear_btn.pack(side="right")

        # Listbox with scrollbar (multiple selection)
        list_frame = ttk.Frame(self)
        list_frame.pack(fill="both", expand=True, padx=10, pady=(0,10))

        self.program_listbox = tk.Listbox(list_frame, selectmode="extended", height=15)
        self.program_listbox.pack(side="left", fill="both", expand=True)

        scrollbar = ttk.Scrollbar(list_frame, orient="vertical", command=self.program_listbox.yview)
        scrollbar.pack(side="right", fill="y")
        self.program_listbox.config(yscrollcommand=scrollbar.set)

        # OK / Cancel buttons
        btn_frame = ttk.Frame(self)
        btn_frame.pack(fill="x", padx=10, pady=10)

        ok_btn = ttk.Button(btn_frame, text="OK", command=self.on_ok)
        ok_btn.pack(side="right", padx=(0,6))

        cancel_btn = ttk.Button(btn_frame, text="Cancel", command=self.on_cancel)
        cancel_btn.pack(side="right", padx=(0,6))

    def populate_list(self, filtered=None):
        self.program_listbox.delete(0, tk.END)
        items = filtered if filtered is not None else PROGRAMS
        for prog in items:
            self.program_listbox.insert(tk.END, prog)

    def on_search(self, event=None):
        query = self.search_var.get().strip().lower()
        if not query:
            self.populate_list()
            return
        matched = [p for p in PROGRAMS if query in p.lower()]
        self.populate_list(matched)

    def clear_search(self):
        self.search_var.set("")
        self.populate_list()
        self.program_listbox.selection_clear(0, tk.END)

    def on_ok(self):
        selections = [self.program_listbox.get(i) for i in self.program_listbox.curselection()]
        if not selections:
            messagebox.showinfo("Selection", "No programs selected.")
            return
        messagebox.showinfo("Selection", "Selected programs:\n" + "\n".join(selections))
        self.destroy()

    def on_cancel(self):
        if messagebox.askyesno("Cancel", "Are you sure you want to cancel?"):
            self.destroy()

if __name__ == "__main__":
    app = App()
    app.mainloop()