Use a type with a greater resolution to represent time values

[pulseview.git] / pv / view / decodetrace.cpp

diff --git a/pv/view/decodetrace.cpp b/pv/view/decodetrace.cpp
index 36e7a10458a0c9467740f5edf770177199268e2f..c0c4d167e109f17f16eeb374aba8420d863dd86f 100644 (file)
--- 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()),