X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=pv%2Fview%2Fview.cpp;h=95b8a5bec9e9f1fde845898ee5ed7a0cf1bfcc58;hb=2c982fc3905ef4d4fa1d87761d3ac14841f01de1;hp=34676334dc67867ba9b17fa064498232693e74e0;hpb=2658961bdef3601e07d494a8ed3d01a8101b68cd;p=pulseview.git

diff --git a/pv/view/view.cpp b/pv/view/view.cpp
index 34676334..95b8a5be 100644
--- a/pv/view/view.cpp
+++ b/pv/view/view.cpp
@@ -70,6 +70,7 @@ View::View(SigSession &session, QWidget *parent) :
 	_scale(1e-6),
 	_offset(0),
 	_v_offset(0),
+	_updating_scroll(false),
 	_show_cursors(false),
 	_cursors(pair<Cursor, Cursor>(Cursor(*this, 0.0),
 		Cursor(*this, 1.0))),
@@ -208,7 +209,9 @@ void View::update_scroll()
 	get_scroll_layout(length, offset);
 	length = max(length - areaSize.width(), 0.0);
 
-	horizontalScrollBar()->setPageStep(areaSize.width());
+	horizontalScrollBar()->setPageStep(areaSize.width() / 2);
+
+	_updating_scroll = true;
 
 	if (length < MaxScrollValue) {
 		horizontalScrollBar()->setRange(0, length);
@@ -219,6 +222,8 @@ void View::update_scroll()
 			_offset * MaxScrollValue / (_scale * length));
 	}
 
+	_updating_scroll = false;
+
 	// Set the vertical scrollbar
 	verticalScrollBar()->setPageStep(areaSize.height());
 	verticalScrollBar()->setRange(0,
@@ -290,6 +295,9 @@ void View::resizeEvent(QResizeEvent*)
 
 void View::h_scroll_value_changed(int value)
 {
+	if (_updating_scroll)
+		return;
+
 	const int range = horizontalScrollBar()->maximum();
 	if (range < MaxScrollValue)
 		_offset = _scale * value;