From: Soeren Apel <redacted>
Date: Sat, 13 Dec 2014 10:20:03 +0000 (+0000)
Subject: View: Fix #515 by fixing typo and extent handling
X-Git-Tag: pulseview-0.3.0~360
X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=commitdiff_plain;h=f1d9ac673ce644a7e2397bd1c4687083157f4a17

View: Fix #515 by fixing typo and extent handling

Typo: extents.first instead of extents.second

The extra scoll height was too large and could result in all
traces being removed from view. To avoid this, the user now has
half of the view height as extra scroll height.
---

diff --git a/pv/view/view.cpp b/pv/view/view.cpp
index 539581ad..f349861f 100644
--- a/pv/view/view.cpp
+++ b/pv/view/view.cpp
@@ -486,9 +486,8 @@ void View::update_scroll()
 	verticalScrollBar()->setSingleStep(areaSize.height() / 8);
 
 	const pair<int, int> extents = v_extents();
-	const int extra_scroll_height = (extents.second - extents.first) / 4;
-	verticalScrollBar()->setRange(extents.first - extra_scroll_height,
-		extents.first + extra_scroll_height);
+	verticalScrollBar()->setRange(extents.first - (areaSize.height() / 2),
+		extents.second - (areaSize.height() / 2));
 }
 
 void View::update_layout()