From 2ad94947d7a8edb4fa9b73db0fb56a7b5fc6f92f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Sun, 22 May 2016 11:54:27 +0200
Subject: [PATCH] Make the file info and graph info having the same text size
 in plots.

---
 src/config.h      |  1 +
 src/graphview.cpp | 10 ++++++----
 src/trackinfo.cpp | 14 +++++++++++++-
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/src/config.h b/src/config.h
index 267130f7..745ac095 100644
--- a/src/config.h
+++ b/src/config.h
@@ -11,6 +11,7 @@
 
 #define FONT_FAMILY     "Arial"
 #define FONT_SIZE       12
+#define SCREEN_DPI      96.0
 
 #define MAP_FILE        QString("maps.txt")
 #define POI_DIR         QString("POI")
diff --git a/src/graphview.cpp b/src/graphview.cpp
index be85dba9..f09147c4 100644
--- a/src/graphview.cpp
+++ b/src/graphview.cpp
@@ -1,6 +1,8 @@
 #include <QGraphicsView>
 #include <QGraphicsSceneMouseEvent>
 #include <QEvent>
+#include <QPaintEngine>
+#include <QPaintDevice>
 #include "config.h"
 #include "axisitem.h"
 #include "slideritem.h"
@@ -237,15 +239,15 @@ void GraphView::resizeEvent(QResizeEvent *)
 
 void GraphView::plot(QPainter *painter, const QRectF &target)
 {
-	qreal ratio = target.width() / target.height();
-	QSizeF orig = _scene->sceneRect().size();
-	QSizeF canvas = QSizeF(orig.height() * ratio, orig.height());
+	qreal ratio = painter->paintEngine()->paintDevice()->logicalDpiX()
+	  / SCREEN_DPI;
+	QSizeF canvas = QSizeF(target.width() / ratio, target.height() / ratio);
 
 	setUpdatesEnabled(false);
 	redraw(canvas);
 	if (_slider->pos().x() == _slider->area().left())
 		_slider->hide();
-	_scene->render(painter, target, _scene->itemsBoundingRect());
+	_scene->render(painter, target);
 	_slider->show();
 	redraw();
 	setUpdatesEnabled(true);
diff --git a/src/trackinfo.cpp b/src/trackinfo.cpp
index 6c68cc19..4d1e676d 100644
--- a/src/trackinfo.cpp
+++ b/src/trackinfo.cpp
@@ -1,6 +1,10 @@
+#include <QPaintEngine>
+#include <QPaintDevice>
+#include "config.h"
 #include "infoitem.h"
 #include "trackinfo.h"
 
+
 TrackInfo::TrackInfo(QObject *parent) : QGraphicsScene(parent)
 {
 	_info = new InfoItem();
@@ -14,7 +18,15 @@ void TrackInfo::insert(const QString &key, const QString &value)
 
 void TrackInfo::plot(QPainter *painter, const QRectF &target)
 {
-	render(painter, target);
+	qreal ratio = painter->paintEngine()->paintDevice()->logicalDpiX()
+	  / SCREEN_DPI;
+	QSizeF canvas = QSizeF(target.width() / ratio, target.height() / ratio);
+	QSizeF diff = QSizeF(qAbs(canvas.width() - sceneRect().width()),
+	  qAbs(canvas.height() - sceneRect().height()));
+	QRectF adj = sceneRect().adjusted(0, -diff.height()/2, diff.width(),
+	  diff.height()/2);
+
+	render(painter, target, adj);
 }
 
 bool TrackInfo::isEmpty()