Only add data points to the throughput graph if our time window has

advanced. Add a reset button.

svn path=/trunk/; revision=51811

ui/qt/tcp_stream_dialog.cpp

@@ -344,7 +344,7 @@ void TCPStreamDialog::initializeThroughput()
         return;
     }
 
-    QVector<double> rel_time, seg_len, tput;
+    QVector<double> rel_time, seg_len, tput_time, tput;
     struct segment *oldest_seg = graph_.segments;
 #ifndef MA_1_SECOND
     int i = 1;
@@ -381,10 +381,19 @@ void TCPStreamDialog::initializeThroughput()
 
         rel_time.append(rt_val);
         seg_len.append(seg->th_seglen);
-        tput.append(av_tput);
+
+        // Add a data point only if our time window has advanced. Otherwise
+        // update the most recent point. (We might want to show a warning
+        // for out-of-order packets.)
+        if (tput_time.size() > 0 && rt_val <= tput_time.last()) {
+            tput[tput.size() - 1] = av_tput;
+        } else {
+            tput.append(av_tput);
+            tput_time.append(rt_val);
+        }
     }
     sp->graph(0)->setData(rel_time, seg_len);
-    sp->graph(1)->setData(rel_time, tput);
+    sp->graph(1)->setData(tput_time, tput);
 
     sp->yAxis->setLabel(tr("Segment length (B)"));
 
@@ -538,6 +547,11 @@ void TCPStreamDialog::on_graphTypeComboBox_currentIndexChanged(int index)
     fillGraph();
 }
 
+void TCPStreamDialog::on_resetButton_clicked()
+{
+    resetAxes();
+}
+
 void TCPStreamDialog::setCaptureFile(capture_file *cf)
 {
     if (!cf) { // We only want to know when the file closes.

ui/qt/tcp_stream_dialog.h

@@ -87,6 +87,7 @@ private slots:
     void transformYRange(const QCPRange &y_range1);
     void on_buttonBox_accepted();
     void on_graphTypeComboBox_currentIndexChanged(int index);
+    void on_resetButton_clicked();
 };
 
 #endif // TCP_STREAM_DIALOG_H

ui/qt/tcp_stream_dialog.ui

@@ -79,6 +79,16 @@
        </property>
       </spacer>
      </item>
+     <item>
+      <widget class="QPushButton" name="resetButton">
+       <property name="toolTip">
+        <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Reset the graph to its initial state.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+       </property>
+       <property name="text">
+        <string>Reset</string>
+       </property>
+      </widget>
+     </item>
     </layout>
    </item>
    <item>