DecodeTrace/DecodeSignal: Rework trace drawing interval

[pulseview.git] / pv / views / trace / decodetrace.cpp

diff --git a/pv/views/trace/decodetrace.cpp b/pv/views/trace/decodetrace.cpp
index d8f04c582ef5a6c9c76696e344e034a52db6bace..f4ab55ffa3ee1cbca8246873057ce67b4b8e264b 100644 (file)
--- a/pv/views/trace/decodetrace.cpp
+++ b/pv/views/trace/decodetrace.cpp
@@ -90,6 +90,8 @@ const double DecodeTrace::EndCapWidth = 5;
 const int DecodeTrace::RowTitleMargin = 10;
 const int DecodeTrace::DrawPadding = 100;
 
+const int DecodeTrace::MaxTraceUpdateRate = 1; // No more than 1 Hz
+
 const QColor DecodeTrace::Colours[16] = {
        QColor(0xEF, 0x29, 0x29),
        QColor(0xF6, 0x6A, 0x32),
@@ -154,6 +156,11 @@ DecodeTrace::DecodeTrace(pv::Session &session,
                this, SLOT(on_delete_decoder(int)));
        connect(&show_hide_mapper_, SIGNAL(mapped(int)),
                this, SLOT(on_show_hide_decoder(int)));
+
+       connect(&delayed_trace_updater_, SIGNAL(timeout()),
+               this, SLOT(on_delayed_trace_update()));
+       delayed_trace_updater_.setSingleShot(true);
+       delayed_trace_updater_.setInterval(1000 / MaxTraceUpdateRate);
 }
 
 bool DecodeTrace::enabled() const
@@ -865,6 +872,12 @@ QComboBox* DecodeTrace::create_channel_selector_init_state(QWidget *parent,
 }
 
 void DecodeTrace::on_new_annotations()
+{
+       if (!delayed_trace_updater_.isActive())
+               delayed_trace_updater_.start();
+}
+
+void DecodeTrace::on_delayed_trace_update()
 {
        if (owner_)
                owner_->row_item_appearance_changed(false, true);