From: Joel Holdsworth <redacted>
Date: Sat, 17 Nov 2012 09:08:41 +0000 (+0000)
Subject: Added snap to grid drag behaviour
X-Git-Tag: pulseview-0.1.0~216
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=491536836d878a3abf7959800f56641ac093bd11;p=pulseview.git

Added snap to grid drag behaviour
---

diff --git a/pv/view/header.cpp b/pv/view/header.cpp
index 00c4201c..97617213 100644
--- a/pv/view/header.cpp
+++ b/pv/view/header.cpp
@@ -155,10 +155,16 @@ void Header::mouseMoveEvent(QMouseEvent *event)
 		const int delta = event->pos().y() - _mouse_down_point.y();
 
 		BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
-			if(s->selected())
-				s->set_v_offset(
+			if(s->selected()) {
+				const int y =
 					_mouse_down_signal_offsets[s.get()] +
-					delta);
+					delta;
+				const int y_snap =
+					((y + View::SignalSnapGridSize / 2) /
+						View::SignalSnapGridSize) *
+						View::SignalSnapGridSize;
+				s->set_v_offset(y_snap	);
+			}
 
 		signals_moved();
 	}
diff --git a/pv/view/view.cpp b/pv/view/view.cpp
index b6add2ee..0a31e808 100644
--- a/pv/view/view.cpp
+++ b/pv/view/view.cpp
@@ -53,6 +53,7 @@ const int View::RulerHeight = 30;
 const int View::MaxScrollValue = INT_MAX / 2;
 
 const int View::SignalHeight = 50;
+const int View::SignalSnapGridSize = 10;
 
 const QColor View::CursorAreaColour(220, 231, 243);
 
diff --git a/pv/view/view.h b/pv/view/view.h
index cda0741d..fb52f530 100644
--- a/pv/view/view.h
+++ b/pv/view/view.h
@@ -54,6 +54,7 @@ private:
 
 public:
 	static const int SignalHeight;
+	static const int SignalSnapGridSize;
 
 	static const QColor CursorAreaColour;