tk 0.1.5

Rust bindings for Tk GUI library
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103

use tcl::*;
use tk::*;
use tk::cmd::*;

use regex::Regex;

fn main() -> TkResult<()> {
    let tk = make_tk!()?;
    let root = tk.root();

    // ## Entry Contents
    {
        let name = root.add_ttk_entry( "name" -textvariable("username") )?.grid(())?;
        tk.run(( "set", "username", "anonymous" ))?;

        println!( "current value is {}", name.get()? );
        name.delete_range( 0.. )?; // delete between two indices, 0-based
        name.insert( 0, "your name" )?; // insert new text at a given index
    }

    // ## Watching for Changes
    {
        #[proc] fn it_has_been_written() -> TkResult<()> { Ok(()) }
        tk.trace_add_variable_write( "username", "it_has_been_written" )?;
    }

    // ## Passwords
    {
        root.add_ttk_entry( "passwd" -textvariable("password") -show("*") )?.grid(())?;
    }

    // ## Validation
    {
        let validate_cmd = tclfn!( &tk, args: "%P",
            fn check_num( new_val: String ) -> TclResult<bool> {
                Ok( new_val.len() <= 5 &&
                    new_val.chars().filter( |&ch| ch >= '0' && ch <= '9' ).count() <= 5 )
            }
        );

        root.add_ttk_entry( "e" -textvariable("num") -validate("key") -validatecommand(validate_cmd) )?
            .grid( -column(0) -row(2) -sticky("we") )?;
    }

    // ## Validation, zip
    {
        const FORMATMSG: &'static str = "Zip should be ##### or #####-####";

        let f = root.add_ttk_frame( "f" )?
            .grid( -column(0) -row(3) )?;

        f.add_ttk_label( "l1" -text("Name:") )?
            .grid( -column(0) -row(4) -padx(5) -pady(5) )?;

        let _e1 = f.add_ttk_entry( "e1" )?
            .grid( -column(1) -row(4) -padx(5) -pady(5) )?;

        f.add_ttk_label( "l" -text("Zip:") )?
            .grid( -column(0) -row(5) -padx(5) -pady(5) )?;

        let f_btn = f.add_ttk_button( "btn" -text("Process") )?
            .grid( -column(2) -row(5) -padx(5) -pady(5) )?;

        f_btn.set_state( TtkState::Disabled )?;

        let check_zip_cmd = tclosure!( tk, cmd: "check_zip", args: "%P %V",
            move |new_val: String, op: String| -> TkResult<bool> {
                let interp = tcl_interp!();
                interp.set( "errmsg", "" );

                let re = r#"^[0-9]{5}(\-[0-9]{4})?$"#;
                let regex = Regex::new( re ).unwrap();
                let valid = regex.is_match( &new_val );
                f_btn.set_state( if valid{ !TtkState::Disabled } else{ TtkState::Disabled })?;
                if op == "key" {
                    let regex = Regex::new( r#"^[0-9\-]*$"# ).unwrap();
                    let ok_so_far = regex.is_match( &new_val ) && new_val.len() <= 10;
                    if !ok_so_far {
                        interp.set( "errmsg", FORMATMSG );
                    }
                    return Ok( true );
                } else if op == "focusout" {
                    if !valid {
                        interp.set( "errmsg", FORMATMSG );
                    }
                }
                if valid {
                    Ok( true )
                } else {
                    Ok( false )
                }
            }
        );

        f.add_ttk_entry( "e" -textvariable("zip") -validate("all") -validatecommand(check_zip_cmd) )?
            .grid( -column(1) -row(5) -padx(5) -pady(5) )?;

        f.add_ttk_label( "msg" -font("TkSmallCaptionFont") -foreground("red") -textvariable("errmsg") )?
            .grid( -column(1) -row(2) -padx(5) -pady(5) -sticky("w") )?;
    }

    Ok( main_loop() )
}