From 8237855202d58e28e912a83e612397b4300a3f3b Mon Sep 17 00:00:00 2001
From: Arne Dußin
Date: Wed, 28 Oct 2020 20:59:36 +0100
Subject: Add option to abort adding a rectangle

---
 src/main.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index e6c85ea..1456684 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,7 +2,6 @@ use piston_window::grid::Grid;
 use piston_window::rectangle::{Border, Rectangle};
 use piston_window::*;
 use sdl2_window::Sdl2Window;
-use std::cmp;
 
 pub const MIN_PIXELS_PER_M: f64 = 0.5;
 pub const MAX_PIXELS_PER_M: f64 = 10_000.;
@@ -87,6 +86,10 @@ fn main() {
                 starting_rect_point = Some(mouse_pos);
             }
         }
+        // Abort drawing a rectangle when clicking with the right mouse button
+        if let Some(Button::Mouse(MouseButton::Right)) = e.press_args() {
+            starting_rect_point = None;
+        }
 
         // Close the window when the user presses escape
         if let Some(Button::Keyboard(Key::Escape)) = e.press_args() {
-- 
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