From 5673b59c1095a8591ebfbb7a3f3a400e67fdd5b4 Mon Sep 17 00:00:00 2001
From: Alexandre Bury <alexandre.bury@gmail.com>
Date: Thu, 22 Mar 2018 14:31:28 -0700
Subject: [PATCH] Implement {SelectView, MenuPopup}::important_area

---
 src/views/menu_popup.rs  | 9 +++++++++
 src/views/select_view.rs | 7 +++++++
 2 files changed, 16 insertions(+)

diff --git a/src/views/menu_popup.rs b/src/views/menu_popup.rs
index 75b79f7..4d871da 100644
--- a/src/views/menu_popup.rs
+++ b/src/views/menu_popup.rs
@@ -4,6 +4,7 @@ use With;
 use align::Align;
 use event::{Callback, Event, EventResult, Key, MouseButton, MouseEvent};
 use menu::{MenuItem, MenuTree};
+use rect::Rect;
 use std::cmp::min;
 use std::rc::Rc;
 use unicode_width::UnicodeWidthStr;
@@ -403,4 +404,12 @@ impl View for MenuPopup {
             self.menu.children.len(),
         );
     }
+
+    fn important_area(&self, size: Vec2) -> Rect {
+        if self.menu.is_empty() {
+            return Rect::from((0, 0));
+        }
+
+        Rect::from_size((0, self.focus), (size.x, 1))
+    }
 }
diff --git a/src/views/select_view.rs b/src/views/select_view.rs
index de140e7..984ff23 100644
--- a/src/views/select_view.rs
+++ b/src/views/select_view.rs
@@ -5,6 +5,7 @@ use align::{Align, HAlign, VAlign};
 use direction::Direction;
 use event::{Callback, Event, EventResult, Key, MouseButton, MouseEvent};
 use menu::MenuTree;
+use rect::Rect;
 use std::borrow::Borrow;
 use std::cell::Cell;
 use std::cmp::min;
@@ -765,6 +766,12 @@ impl<T: 'static> View for SelectView<T> {
                 .set_heights(size.y, self.items.len());
         }
     }
+
+    fn important_area(&self, size: Vec2) -> Rect {
+        self.selected_id()
+            .map(|i| Rect::from_size((0, i), (size.x, 1)))
+            .unwrap_or(Rect::from((0, 0)))
+    }
 }
 
 struct Item<T> {