X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fprop%2Fbool.cpp;h=e0e052fc6b2b377c3d580192beda10793d331884;hp=179208a5e1c927b74de3469b3aca4a8d3634d453;hb=a28c30252fd32d3185c62062dfad74ae659ae383;hpb=b1fe148e0dce6e369c9d4770ca935a6a9ec94b59

diff --git a/pv/prop/bool.cpp b/pv/prop/bool.cpp
index 179208a5..e0e052fc 100644
--- a/pv/prop/bool.cpp
+++ b/pv/prop/bool.cpp
@@ -24,9 +24,6 @@
 
 #include "bool.h"
 
-using namespace std;
-using namespace boost;
-
 namespace pv {
 namespace prop {
 
@@ -45,15 +42,14 @@ QWidget* Bool::get_widget(QWidget *parent, bool auto_commit)
 	if (_check_box)
 		return _check_box;
 
-	_check_box = new QCheckBox(name(), parent);
-
 	GVariant *const value = _getter ? _getter() : NULL;
+	if (!value)
+		return NULL;
 
-	if (value) {
-		_check_box->setCheckState(g_variant_get_boolean(value) ?
-			Qt::Checked : Qt::Unchecked);
-		g_variant_unref(value);
-	}
+	_check_box = new QCheckBox(name(), parent);
+	_check_box->setCheckState(g_variant_get_boolean(value) ?
+		Qt::Checked : Qt::Unchecked);
+	g_variant_unref(value);
 
 	if (auto_commit)
 		connect(_check_box, SIGNAL(stateChanged(int)),