AnalogSignal: Implement info text for V/div display

[pulseview.git] / pv / session.cpp

diff --git a/pv/session.cpp b/pv/session.cpp
index 7545da3c15030a7090974f1ee65ee4f413c2e44a..ebef90cbb6590fb9961fad97f73047e56e8acc79 100644 (file)
--- a/pv/session.cpp
+++ b/pv/session.cpp
@@ -138,16 +138,21 @@ void Session::set_device(shared_ptr<devices::Device> device)
        if (device_)
                device_->close();
 
+       device_.reset();
+
+       // Remove all traces
+       signals_.clear();
+       decode_traces_.clear();
+       signals_changed();
+
        device_ = std::move(device);
        device_->open();
        device_->session()->add_datafeed_callback([=]
                (shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
                        data_feed_in(device, packet);
                });
-       update_signals();
-
-       decode_traces_.clear();
 
+       update_signals();
        device_selected();
 }
 
@@ -333,7 +338,11 @@ void Session::set_capture_state(capture_state state)
 
 void Session::update_signals()
 {
-       assert(device_);
+       if (!device_) {
+               signals_.clear();
+               logic_data_.reset();
+               return;
+       }
 
        lock_guard<recursive_mutex> lock(data_mutex_);
 
@@ -581,7 +590,7 @@ void Session::feed_in_analog(shared_ptr<Analog> analog)
                if (iter != cur_analog_segments_.end())
                        segment = (*iter).second;
                else {
-                       // If no segment was found, this means we havn't
+                       // If no segment was found, this means we haven't
                        // created one yet. i.e. this is the first packet
                        // in the sweep containing this segment.
                        sweep_beginning = true;