From: Soeren Apel <redacted>
Date: Fri, 8 Apr 2016 16:32:41 +0000 (+0200)
Subject: DecodeTrace: Make an empty decode trace appear symmetrical
X-Git-Tag: pulseview-0.4.0~311
X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=commitdiff_plain;h=e40a79cb13eef1ca4f8e7670ac4a36e56b26a23c

DecodeTrace: Make an empty decode trace appear symmetrical
---

diff --git a/pv/view/decodetrace.cpp b/pv/view/decodetrace.cpp
index ab9514cd..20de3755 100644
--- a/pv/view/decodetrace.cpp
+++ b/pv/view/decodetrace.cpp
@@ -169,7 +169,10 @@ pair<int, int> DecodeTrace::v_extents() const
 {
 	const int row_height = (ViewItemPaintParams::text_height() * 6) / 4;
 
-	return make_pair(-row_height, row_height * max_visible_rows_);
+	// Make an empty decode trace appear symmetrical
+	const int row_count = max(1, max_visible_rows_);
+
+	return make_pair(-row_height, row_height * row_count);
 }
 
 void DecodeTrace::paint_back(QPainter &p, const ViewItemPaintParams &pp)