Example for push_id

imgui-examples/examples/id_wrangling.rs

@@ -0,0 +1,46 @@
+mod support;
+
+fn main() {
+    let system = support::init(file!());
+    system.main_loop(move |_, ui| {
+        let items = vec!["a", "b", "c", "d"];
+
+        ui.window("Broken Example")
+        .position([0.0, 0.0], imgui::Condition::FirstUseEver)
+        .size([390.0, 200.0], imgui::Condition::FirstUseEver)
+        .build(|| {
+            ui.text("Broken! Only first button responds to clicks");
+
+            // Because all our buttons have the same label (and thus ID),
+            // only the first button responds to clicks!
+            for it in &items {
+                ui.text(it);
+                for num in 0..5 {
+                    ui.same_line();
+                    if ui.button("Example") {
+                        println!("{}: {}", it, num);
+                    }
+                }
+            }
+        });
+
+        ui.window("Good Example")
+        .position([400.0, 0.0], imgui::Condition::FirstUseEver)
+        .size([390.0, 200.0], imgui::Condition::FirstUseEver)
+        .build(|| {
+            ui.text("Works!");
+            for it in &items {
+                let _label_id = ui.push_id(it);
+                ui.text(it);
+                for num in 0..5 {
+                    let _num_id = ui.push_id(num);
+                    ui.same_line();
+                    if ui.button("Example") {
+                        println!("{}: {}", it, num);
+                    }
+                }
+            }
+        });
+
+    });
+}