From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 25 Nov 2016 21:18:05 +0000 (+0200)
Subject: Alter the starting condition for gestures
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgui.git;a=commitdiff_plain;h=81a662b025809d71d8dc67a2108ad7d54ba7c645

Alter the starting condition for gestures

This makes pinch and rotate in particular easier to perform.
---

diff --git a/source/input/gesturedetector.cpp b/source/input/gesturedetector.cpp
index 62ac3f0..97e3d56 100644
--- a/source/input/gesturedetector.cpp
+++ b/source/input/gesturedetector.cpp
@@ -150,11 +150,12 @@ void GestureDetector::start_gesture()
 	if(!p.down)
 		return;
 
-	/* At least one point needs to have moved more than the threshold to start
-	the gesture. */
-	bool threshold_exceeded = false;
-	for(unsigned i=0; (i<MAX_POINTS && !threshold_exceeded); ++i)
-		threshold_exceeded = (points[i].down && points[i].threshold_exceeded);
+	/* All held points need to have moved more than the threshold to start the
+	gesture. */
+	bool threshold_exceeded = true;
+	for(unsigned i=0; (i<MAX_POINTS && threshold_exceeded); ++i)
+		if(points[i].down && !points[i].threshold_exceeded)
+			threshold_exceeded = false;
 	if(!threshold_exceeded)
 		return;