From 7028802380dcf44d8f628f8694bf4cbc036adb13 Mon Sep 17 00:00:00 2001
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Date: Mon, 11 Jan 2021 14:31:37 +0300
Subject: [PATCH] =?UTF-8?q?=D0=9F=D1=80=D1=8F=D0=BC=D0=BE=D1=83=D0=B3?=
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---
 README.md    | 3 +++
 qtsgraph.cpp | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/README.md b/README.md
index ac61fcc..7cbf090 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,9 @@
 
 Предназначен для образовательных целей, чтобы упростить обучающимся рисование простых примитивов. Используются простые и понятные названия процедур отрисовки без использования громоздкой структуры Qt5.
 
+Qt Creator можно скачать бесплатно с официального сайта:
+https://www.qt.io/download-qt-installer
+
 Описание на Wiki тут:
 https://github.com/temaps/qtSimpleGraph/wiki
 
diff --git a/qtsgraph.cpp b/qtsgraph.cpp
index 83a4ab4..962638a 100644
--- a/qtsgraph.cpp
+++ b/qtsgraph.cpp
@@ -50,6 +50,8 @@ void QTSGraph::Ellipse(int x1, int y1, int x2, int y2)
     QPainter painter(&Canvas);
     painter.setPen(Pen);
     painter.setBrush(Brush);
+    if(y1 > y2) std::swap(y1, y2);
+    if(x1 > x2) std::swap(x1, x2);
     if(SwapYAxis) painter.drawEllipse(x1, Canvas.height() - y1 - abs(y2 - y1) - 1, abs(x2-x1), abs(y2-y1));
     else  painter.drawEllipse(x1, y1, abs(x2-x1), abs(y2-y1));
     update();
@@ -176,6 +178,8 @@ void QTSGraph::Rectangle(int x1, int y1, int x2, int y2)
     QPainter painter(&Canvas);
     painter.setPen(Pen);
     painter.setBrush(Brush);
+    if(y1 > y2) std::swap(y1, y2);
+    if(x1 > x2) std::swap(x1, x2);
     if(SwapYAxis) painter.drawRect(x1, Canvas.height() - y1 - abs(y2 - y1) - 1, x2 - x1, y2 - y1);
     else painter.drawRect(x1, y1, x2 - x1, y2 - y1);
     update();