X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Fview%2Fdecodetrace.cpp;h=c0c4d167e109f17f16eeb374aba8420d863dd86f;hb=60d9b99a32e551cffd2b537d3e157d578a761c9b;hp=36e7a10458a0c9467740f5edf770177199268e2f;hpb=f32905530347e1020d5ce7959123cf797c9a4829;p=pulseview.git

diff --git a/pv/view/decodetrace.cpp b/pv/view/decodetrace.cpp
index 36e7a10..c0c4d16 100644
--- a/pv/view/decodetrace.cpp
+++ b/pv/view/decodetrace.cpp
@@ -525,7 +525,7 @@ pair<double, double> DecodeTrace::get_pixels_offset_samples_per_pixel() const
 	assert(scale > 0);
 
 	const double pixels_offset =
-		(view->offset() - decoder_stack_->start_time()) / scale;
+		((view->offset() - decoder_stack_->start_time()) / scale).convert_to<double>();
 
 	double samplerate = decoder_stack_->samplerate();
 
@@ -642,13 +642,17 @@ void DecodeTrace::create_decoder_form(int index,
 	const srd_decoder *const decoder = dec->decoder();
 	assert(decoder);
 
+	const bool decoder_deletable = index > 0;
+
 	pv::widgets::DecoderGroupBox *const group =
 		new pv::widgets::DecoderGroupBox(
-			QString::fromUtf8(decoder->name));
+			QString::fromUtf8(decoder->name), nullptr, decoder_deletable);
 	group->set_decoder_visible(dec->shown());
 
-	delete_mapper_.setMapping(group, index);
-	connect(group, SIGNAL(delete_decoder()), &delete_mapper_, SLOT(map()));
+	if (decoder_deletable) {
+		delete_mapper_.setMapping(group, index);
+		connect(group, SIGNAL(delete_decoder()), &delete_mapper_, SLOT(map()));
+	}
 
 	show_hide_mapper_.setMapping(group, index);
 	connect(group, SIGNAL(show_hide_decoder()),