From a33cc511765f28921df1aeb39d8bdc95eceb8c7b Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 25 Apr 2015 01:02:53 +0200
Subject: [PATCH] tweak persistent tooltip:
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* don’t show empty tooltips
* “smaller” widgets may receive a leave event before the timeout
can show the tooltip (knobs in particula)
---
 libs/gtkmm2ext/persistent_tooltip.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libs/gtkmm2ext/persistent_tooltip.cc b/libs/gtkmm2ext/persistent_tooltip.cc
index 77a8d94c0f..731ede52d9 100644
--- a/libs/gtkmm2ext/persistent_tooltip.cc
+++ b/libs/gtkmm2ext/persistent_tooltip.cc
@@ -65,8 +65,8 @@ PersistentTooltip::timeout ()
 bool
 PersistentTooltip::leave (GdkEventCrossing *)
 {
-	_timeout.disconnect ();
 	if (!dragging ()) {
+		_timeout.disconnect ();
 		hide ();
 	}
 
@@ -110,6 +110,9 @@ PersistentTooltip::hide ()
 void
 PersistentTooltip::show ()
 {
+	if (_tip.empty()) {
+		return;
+	}
 	if (!_window) {
 		_window = new Window (WINDOW_POPUP);
 		_window->set_name (X_("ContrastingPopup"));