From 267094dc6c7e369c377dc201d923923b9162d3a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Wed, 1 Mar 2023 00:23:01 +0100
Subject: [PATCH] Fixed build with older Qt versions

---
 src/GUI/app.cpp  | 1 +
 src/data/dem.cpp | 9 ++++++---
 src/data/dem.h   | 1 +
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/GUI/app.cpp b/src/GUI/app.cpp
index e18ce0cd..d08caef2 100644
--- a/src/GUI/app.cpp
+++ b/src/GUI/app.cpp
@@ -56,6 +56,7 @@ App::App(int &argc, char **argv) : QApplication(argc, argv)
 	   "QThreadStorage: Thread X exited after QThreadStorage Y destroyed" */
 	Downloader::setNetworkManager(new QNetworkAccessManager(this));
 	DEM::setDir(ProgramPaths::demDir());
+	DEM::setCacheSize(536870912/*512MB*/);
 	QSurfaceFormat fmt;
 	fmt.setStencilBufferSize(8);
 	fmt.setSamples(4);
diff --git a/src/data/dem.cpp b/src/data/dem.cpp
index 7e31fb8c..1011f216 100644
--- a/src/data/dem.cpp
+++ b/src/data/dem.cpp
@@ -21,8 +21,6 @@
 #include "common/rectc.h"
 #include "dem.h"
 
-#define CACHE_SIZE 536870912 /* 512MB */
-
 #define SRTM3_SAMPLES  1201
 #define SRTM1_SAMPLES  3601
 #define SRTM05_SAMPLES 7201
@@ -89,13 +87,18 @@ QString DEM::Tile::baseName() const
 }
 
 QString DEM::_dir;
-DEM::TileCache DEM::_data = DEM::TileCache(CACHE_SIZE);
+DEM::TileCache DEM::_data;
 
 QString DEM::fileName(const QString &baseName)
 {
 	return QDir(_dir).absoluteFilePath(baseName);
 }
 
+void DEM::setCacheSize(int size)
+{
+	_data.setMaxCost(size);
+}
+
 void DEM::setDir(const QString &path)
 {
 	_dir = path;
diff --git a/src/data/dem.h b/src/data/dem.h
index 1d62d168..727fe6ee 100644
--- a/src/data/dem.h
+++ b/src/data/dem.h
@@ -34,6 +34,7 @@ public:
 		int _lon, _lat;
 	};
 
+	static void setCacheSize(int size);
 	static void setDir(const QString &path);
 	static void clearCache();
 	static qreal elevation(const Coordinates &c);