Function fltk::app::widget_from_id

source · 
pub fn widget_from_id<T: 'static + Clone>(id: &str) -> Option<T>
Expand description

Get back the widget thru its id

Examples found in repository?
examples/widget_id.rs (line 29)
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fn increment_by(step: i32) {
    let mut frame: frame::Frame = app::widget_from_id("my_frame").unwrap();
    let state = app::GlobalState::<Counter>::get();
    let count = state.with(move |c| {
        c.count += step;
        c.count
    });
    frame.set_label(&count.to_string());
}

// To pass a function object directly!
fn increment(_w: &mut impl WidgetExt) {
    let mut frame: frame::Frame = app::widget_from_id("my_frame").unwrap();
    let state = app::GlobalState::<Counter>::get();
    let count = state.with(|c| {
        c.count += 1;
        c.count
    });
    frame.set_label(&count.to_string());
}
More examples
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examples/editor.rs (line 168)
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fn menu_cb(m: &mut impl MenuExt) {
    if let Ok(mpath) = m.item_pathname(None) {
        let ed: text::TextEditor = app::widget_from_id("ed").unwrap();
        match mpath.as_str() {
            "&File/New...\t" => {
                STATE.with(|s| {
                    if !s.buf.text().is_empty() {
                        let c = dialog::choice2_default(
                            "Are you sure you want to clear the buffer?",
                            "Yes",
                            "No",
                            "",
                        );
                        if c == Some(0) {
                            s.buf.set_text("");
                            s.saved = false;
                        }
                    }
                });
            }
            "&File/Open...\t" => {
                let c = nfc_get_file(dialog::NativeFileChooserType::BrowseFile);
                if let Ok(text) = std::fs::read_to_string(&c) {
                    STATE.with(move |s| {
                        s.buf.set_text(&text);
                        s.saved = false;
                        s.current_file = c.clone();
                    });
                }
            }
            "&File/Save\t" => {
                STATE.with(|s| {
                    if !s.saved && s.current_file.exists() {
                        std::fs::write(&s.current_file, s.buf.text()).ok();
                    }
                });
            }
            "&File/Save as...\t" => {
                let c = nfc_get_file(dialog::NativeFileChooserType::BrowseSaveFile);
                STATE.with(move |s| {
                    std::fs::write(&c, s.buf.text()).ok();
                    s.saved = true;
                    s.current_file = c.clone();
                });
            }
            "&File/Quit\t" => quit_cb(),
            "&Edit/Cut\t" => ed.cut(),
            "&Edit/Copy\t" => ed.copy(),
            "&Edit/Paste\t" => ed.paste(),
            "&Help/About\t" => {
                dialog::message_default("A minimal text editor written using fltk-rs!")
            }
            _ => unreachable!(),
        }
    }
}