[Rust] Ported Level Bars demo

src/Level Bars/code.rs

@@ -0,0 +1,60 @@
+use crate::workbench;
+use gtk::glib;
+use gtk::prelude::*;
+
+pub fn main() {
+    let bar_continuous: gtk::LevelBar = workbench::builder().object("bar_continuous").unwrap();
+
+    bar_continuous.add_offset_value("full", 100.0);
+    bar_continuous.add_offset_value("half", 50.0);
+    bar_continuous.add_offset_value("low", 25.0);
+
+    let bar_discrete: gtk::LevelBar = workbench::builder().object("bar_discrete").unwrap();
+
+    bar_discrete.add_offset_value("very-weak", 1.0);
+    bar_discrete.add_offset_value("weak", 2.0);
+    bar_discrete.add_offset_value("moderate", 4.0);
+    bar_discrete.add_offset_value("strong", 6.0);
+
+    let entry: gtk::PasswordEntry = workbench::builder().object("entry").unwrap();
+    let label_strength: gtk::Label = workbench::builder().object("label_strength").unwrap();
+
+    // We're using the glib::clone! macro to
+    // provide access to the object from the handling closure
+    // https://gtk-rs.org/gtk-rs-core/stable/latest/docs/glib/macro.clone.html
+
+    entry.connect_text_notify(gtk::glib::clone!(
+        @weak label_strength, @weak bar_discrete => move |entry| {
+            // This is not a secure way to estimate password strength
+            // Use appropriate solutions instead
+            // such as https://github.com/dropbox/zxcvbn
+            let level = std::cmp::min(entry.text().len() / 2, 6);
+
+            match level {
+                1 => {
+                    label_strength.set_label("Very Weak");
+                    label_strength.set_css_classes(&["very-weak-label"]);
+                }
+                2 => {
+                    label_strength.set_label("Weak");
+                    label_strength.set_css_classes(&["weak-label"]);
+                }
+                3 | 4 => {
+                    label_strength.set_label("Moderate");
+                    label_strength.set_css_classes(&["moderate-label"]);
+
+                }
+                5 | 6 => {
+                    label_strength.set_label("Strong");
+                    label_strength.set_css_classes(&["strong-label"]);
+                }
+                _ => {
+                    label_strength.set_label("");
+                    label_strength.set_css_classes(&[]);
+                }
+            }
+
+            bar_discrete.set_value(level as f64)
+        }
+    ));
+}