From a1de3c956cc851eacec624b1a54912974bf82053 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Sun, 27 Oct 2019 19:53:32 +0100
Subject: [PATCH] Fixed broken graphs with missing time data handling

---
 src/GUI/graphitem.cpp | 3 ++-
 src/GUI/graphview.cpp | 7 ++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/GUI/graphitem.cpp b/src/GUI/graphitem.cpp
index b463321f..3bebeec9 100644
--- a/src/GUI/graphitem.cpp
+++ b/src/GUI/graphitem.cpp
@@ -234,7 +234,8 @@ void GraphItem::updateBounds()
 		}
 	}
 
-	_bounds = QRectF(QPointF(left, top), QPointF(right, bottom));
+	QRectF bounds(QPointF(left, top), QPointF(right, bottom));
+	_bounds = bounds.isValid() ? bounds : QRectF();
 }
 
 qreal GraphItem::max() const
diff --git a/src/GUI/graphview.cpp b/src/GUI/graphview.cpp
index a48121e4..54302690 100644
--- a/src/GUI/graphview.cpp
+++ b/src/GUI/graphview.cpp
@@ -166,6 +166,10 @@ void GraphView::setGraphType(GraphType type)
 	for (int i = 0; i < _graphs.count(); i++) {
 		GraphItem *gi = _graphs.at(i);
 		gi->setGraphType(type);
+		if (gi->bounds().isNull())
+			removeItem(gi);
+		else
+			addItem(gi);
 		_bounds |= gi->bounds();
 	}
 
@@ -194,7 +198,8 @@ void GraphView::addGraph(GraphItem *graph)
 	  SLOT(emitSliderPositionChanged(qreal)));
 
 	_graphs.append(graph);
-	_scene->addItem(graph);
+	if (!graph->bounds().isNull())
+		_scene->addItem(graph);
 	_bounds |= graph->bounds();
 
 	setXUnits();