fix: Update view is blocking

DSView/pv/data/decoderstack.cpp

@@ -68,6 +68,7 @@ DecoderStack::DecoderStack(pv::SigSession *session,
     _is_capture_end = true;
     _snapshot = NULL;
     _progress = 0;
+    _is_decoding = false;
     
     _stack.push_back(new decode::Decoder(dec));
  
@@ -518,6 +519,7 @@ void DecoderStack::decode_data(const uint64_t decode_start, const uint64_t decod
 
     _progress = 0;
     uint64_t sended_len  = 0;
+    _is_decoding = true;
   
     while(i < end_index && !_no_memory && !status->_bStop)
     {
@@ -606,6 +608,8 @@ void DecoderStack::decode_data(const uint64_t decode_start, const uint64_t decod
     }
 
     _progress = 100;
+    _is_decoding = false;
+    
     new_decode_data();
 
     // the task is normal ends,so all samples was processed;

DSView/pv/data/decoderstack.h

@@ -169,10 +169,15 @@ public:
 
     inline void set_capture_end_flag(bool isEnd){
         _is_capture_end = isEnd;
-        if (!isEnd){_progress = 0;}
+        if (!isEnd){
+            _progress = 0;
+            _is_decoding = false;
+        }
     }
 
     inline int get_progress(){
+        //if (!_is_decoding && _progress == 0)
+          //  return -1;
         return _progress;
     }
 
@@ -210,6 +215,7 @@ private:
     mutable std::mutex _output_mutex; 
     bool            _is_capture_end;
     int             _progress;
+    bool            _is_decoding;
 
 	friend class DecoderStackTest::TwoDecoderStack;
 };

DSView/pv/dock/protocolitemlayer.cpp

@@ -103,7 +103,11 @@ void ProtocolItemLayer::on_format_select_changed(int index){
             _progress_label->setStyleSheet("color:green;");
         else
             _progress_label->setStyleSheet("color:red;");
-        _progress_label->setText(str);
+
+        if (progress >= 0)
+            _progress_label->setText(str);
+        else
+            _progress_label->setText("");
  }
 
 void ProtocolItemLayer::ResetStyle(){

DSView/pv/sigsession.cpp

@@ -1267,6 +1267,7 @@ namespace pv
 
                 // Post a message to start all decode tasks.
                 if (mode == LOGIC){
+                    dsv_info("Receive SR_DF_END.");
                     _callback->trigger_message(DSV_MSG_REV_END_PACKET);
                 }
                 else{

DSView/pv/view/viewport.cpp

@@ -1356,7 +1356,7 @@ void Viewport::set_receive_len(quint64 length)
     }
 
     // Received new data, and refresh the view.
-    repaint();
+    update();
 }
 
 void Viewport::clear_measure()