From 0c9caab59e25081181c422b48d92d488840c3a47 Mon Sep 17 00:00:00 2001
From: Shaohua Tong <shaohua.tong@stud.hs-emden-leer.de>
Date: Wed, 8 Jan 2020 17:02:11 +0100
Subject: [PATCH] limit cycle radius

---
 src/DrawRender.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/DrawRender.cpp b/src/DrawRender.cpp
index baf886b..c531f38 100644
--- a/src/DrawRender.cpp
+++ b/src/DrawRender.cpp
@@ -24,10 +24,16 @@ void DrawRender::graphicsUpdate(int type) {
                                 oldCircle.getUperLeft().x, oldCircle.getUperLeft().y);
 
         int radius = utils::getDistance(getMouseLeftDownPosition(), getMousePostion()) / 2;
+
         vkvm::Coordinates center;
         center.x = (mousePosition.x + mouseLeftDownPosition.x) / 2;
         center.y = (mousePosition.y + mouseLeftDownPosition.y) / 2;
 
+        if(center.x + radius > windowWidth || center.x - radius < 0
+                || center.y + radius > windowHeight || center.y - radius < 0) {
+            radius = utils::min(utils::min(center.x, windowWidth - center.x), utils::min(center.y, windowHeight - center.y));
+        }
+
         oldCircle = Circle(center, radius, penWidth, false);
 
         painting = true;