From 3aca1771329cf7845cbc6c98e536cfb6c0e7c3ff Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector0193@gmail.com>
Date: Thu, 12 Nov 2020 01:24:59 +0100
Subject: Implement event capturing for `Canvas`

---
 graphics/src/widget/canvas.rs         | 11 +++++++----
 graphics/src/widget/canvas/event.rs   |  1 +
 graphics/src/widget/canvas/program.rs |  9 +++++----
 3 files changed, 13 insertions(+), 8 deletions(-)

(limited to 'graphics/src/widget')

diff --git a/graphics/src/widget/canvas.rs b/graphics/src/widget/canvas.rs
index 4478bca8..ae0d87a4 100644
--- a/graphics/src/widget/canvas.rs
+++ b/graphics/src/widget/canvas.rs
@@ -16,11 +16,11 @@ use iced_native::{
 use std::hash::Hash;
 use std::marker::PhantomData;
 
+pub mod event;
 pub mod path;
 
 mod cache;
 mod cursor;
-mod event;
 mod fill;
 mod frame;
 mod geometry;
@@ -184,11 +184,14 @@ where
         let cursor = Cursor::from_window_position(cursor_position);
 
         if let Some(canvas_event) = canvas_event {
-            if let Some(message) =
-                self.program.update(canvas_event, bounds, cursor)
-            {
+            let (event_status, message) =
+                self.program.update(canvas_event, bounds, cursor);
+
+            if let Some(message) = message {
                 messages.push(message);
             }
+
+            return event_status;
         }
 
         event::Status::Ignored
diff --git a/graphics/src/widget/canvas/event.rs b/graphics/src/widget/canvas/event.rs
index 67a5d3bc..ede2fd73 100644
--- a/graphics/src/widget/canvas/event.rs
+++ b/graphics/src/widget/canvas/event.rs
@@ -1,3 +1,4 @@
+//! Handle events of a canvas.
 use iced_native::keyboard;
 use iced_native::mouse;
 
diff --git a/graphics/src/widget/canvas/program.rs b/graphics/src/widget/canvas/program.rs
index 725d9d72..e8f43380 100644
--- a/graphics/src/widget/canvas/program.rs
+++ b/graphics/src/widget/canvas/program.rs
@@ -1,4 +1,5 @@
-use crate::canvas::{Cursor, Event, Geometry};
+use crate::canvas::event::{self, Event};
+use crate::canvas::{Cursor, Geometry};
 use iced_native::{mouse, Rectangle};
 
 /// The state and logic of a [`Canvas`].
@@ -27,8 +28,8 @@ pub trait Program<Message> {
         _event: Event,
         _bounds: Rectangle,
         _cursor: Cursor,
-    ) -> Option<Message> {
-        None
+    ) -> (event::Status, Option<Message>) {
+        (event::Status::Ignored, None)
     }
 
     /// Draws the state of the [`Program`], producing a bunch of [`Geometry`].
@@ -67,7 +68,7 @@ where
         event: Event,
         bounds: Rectangle,
         cursor: Cursor,
-    ) -> Option<Message> {
+    ) -> (event::Status, Option<Message>) {
         T::update(self, event, bounds, cursor)
     }
 
-- 
cgit