From 4ce34dacd1356c71b1f5bd976e256c86d7966b44 Mon Sep 17 00:00:00 2001
From: Justin Wong <justin.w.xd@gmail.com>
Date: Tue, 17 Oct 2017 17:25:33 +0800
Subject: [PATCH] enable HiDPI only Qt >= 5.6.0

---
 .travis.yml  | 6 ++----
 src/main.cpp | 5 ++++-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index ca486dc..800947b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 sudo: required
-dist: xenial
+dist: trusty
 language: cpp
 
 env:
@@ -7,14 +7,12 @@ env:
     - BUILDTYPE=Debug
 
 before_install:
-    - sudo add-apt-repository --yes ppa:beineri/opt-qt591-xenial
     - sudo apt-get update -qq
 
 install:
-    - sudo apt-get install -qq qt59-meta-full libqt5x11extras5-dev
+    - sudo apt-get install -qq qt5-default libqt5x11extras5-dev
 
 script:
-    - source /opt/qt59/bin/qt59-env.sh
     - mkdir build/
     - cd build/
     - cmake .. -DCMAKE_BUILD_TYPE=$BUILDTYPE
diff --git a/src/main.cpp b/src/main.cpp
index 6414bd1..4efb739 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,4 +1,5 @@
-#include <QApplication>
+#include <QtGlobal>
+#include <QApplication>
 #include <QDebug>
 #include <QDesktopWidget>
 #include <ctime>
@@ -11,7 +12,9 @@
 #endif
 int main(int argc, char *argv[])
 {
+#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
     std::srand(std::time(0));