Add readouts for track length and distance from start of track

to GPS information panel
qgis · Nov 11, 2022 · 187da08 · 187da08
1 parent 32db68b
commit 187da08
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Showing 6 changed files with 286 additions and 159 deletions.
diff --git a/src/app/gps/qgsappgpsdigitizing.cpp b/src/app/gps/qgsappgpsdigitizing.cpp
@@ -117,6 +117,11 @@ double QgsAppGpsDigitizing::trackDirectLength() const
   return mDa.measureLine( { QgsPointXY( mCaptureListWgs84.constFirst() ), QgsPointXY( mCaptureListWgs84.constLast() )} );
 }
 
+const QgsDistanceArea &QgsAppGpsDigitizing::distanceArea() const
+{
+  return mDa;
+}
+
 void QgsAppGpsDigitizing::addVertex()
 {
   if ( !mRubberBand )
@@ -622,6 +627,7 @@ void QgsAppGpsDigitizing::updateDistanceArea()
 {
   mDa.setEllipsoid( QgsProject::instance()->ellipsoid() );
   mDa.setSourceCrs( mWgs84CRS, QgsProject::instance()->transformContext() );
+  emit distanceAreaChanged();
 }
 
 void QgsAppGpsDigitizing::createRubberBand()

diff --git a/src/app/gps/qgsappgpsdigitizing.h b/src/app/gps/qgsappgpsdigitizing.h
@@ -64,6 +64,11 @@ class APP_EXPORT QgsAppGpsDigitizing: public QObject
      */
     double trackDirectLength() const;
 
+    /**
+     * Returns the distance area calculator used to calculate track lengths.
+     */
+    const QgsDistanceArea &distanceArea() const;
+
   public slots:
     void addVertex();
     void resetTrack();
@@ -83,6 +88,11 @@ class APP_EXPORT QgsAppGpsDigitizing: public QObject
      */
     void trackChanged();
 
+    /**
+     * Emitted whenever the distance area used to calculate track distances is changed.
+     */
+    void distanceAreaChanged();
+
   private slots:
     void gpsSettingsChanged();
     void updateTrackAppearance();

diff --git a/src/app/gps/qgsgpsinformationwidget.cpp b/src/app/gps/qgsgpsinformationwidget.cpp
@@ -27,6 +27,7 @@
 #include "qgsgpsconnection.h"
 #include "qgscoordinateutils.h"
 #include "qgsappgpssettingsmenu.h"
+#include "qgsappgpsdigitizing.h"
 
 // QWT Charting widget
 
@@ -53,10 +54,11 @@
 
 
 QgsGpsInformationWidget::QgsGpsInformationWidget( QgsAppGpsConnection *connection,
-    QgsMapCanvas *mapCanvas, QWidget *parent )
+    QgsMapCanvas *mapCanvas, QgsAppGpsDigitizing *digitizing, QWidget *parent )
   : QgsPanelWidget( parent )
   , mConnection( connection )
   , mMapCanvas( mapCanvas )
+  , mDigitizing( digitizing )
 {
   Q_ASSERT( mMapCanvas ); // precondition
   setupUi( this );
@@ -205,6 +207,9 @@ QgsGpsInformationWidget::QgsGpsInformationWidget( QgsAppGpsConnection *connectio
         break;
     }
   } );
+
+  connect( mDigitizing, &QgsAppGpsDigitizing::trackChanged, this, &QgsGpsInformationWidget::updateTrackInformation );
+  connect( mDigitizing, &QgsAppGpsDigitizing::distanceAreaChanged, this, &QgsGpsInformationWidget::updateTrackInformation );
 }
 
 QgsGpsInformationWidget::~QgsGpsInformationWidget()
@@ -288,6 +293,38 @@ void QgsGpsInformationWidget::gpsConnected()
   mGPSPlainTextEdit->appendPlainText( tr( "Connected!" ) );
 }
 
+void QgsGpsInformationWidget::updateTrackInformation()
+{
+  const double totalTrackLength = mDigitizing->totalTrackLength();
+  const double directTrackLength = mDigitizing->trackDirectLength();
+
+  const QgsSettings settings;
+  const bool keepBaseUnit = settings.value( QStringLiteral( "qgis/measure/keepbaseunit" ), true ).toBool();
+  const int decimalPlaces = settings.value( QStringLiteral( "qgis/measure/decimalplaces" ), 3 ).toInt();
+
+  if ( totalTrackLength > 0 )
+  {
+    mTxtTotalTrackLength->setEnabled( true );
+    mTxtTotalTrackLength->setText( mDigitizing->distanceArea().formatDistance( totalTrackLength, decimalPlaces, mDigitizing->distanceArea().lengthUnits(), keepBaseUnit ) );
+  }
+  else
+  {
+    mTxtTotalTrackLength->setEnabled( false );
+    mTxtTotalTrackLength->setText( tr( "Not available" ) );
+  }
+
+  if ( directTrackLength > 0 )
+  {
+    mTxtDirectTrackLength->setEnabled( true );
+    mTxtDirectTrackLength->setText( mDigitizing->distanceArea().formatDistance( directTrackLength, decimalPlaces, mDigitizing->distanceArea().lengthUnits(), keepBaseUnit ) );
+  }
+  else
+  {
+    mTxtDirectTrackLength->setEnabled( false );
+    mTxtDirectTrackLength->setText( tr( "Not available" ) );
+  }
+}
+
 void QgsGpsInformationWidget::gpsDisconnected()
 {
   mGPSPlainTextEdit->appendPlainText( tr( "Disconnected…" ) );

diff --git a/src/app/gps/qgsgpsinformationwidget.h b/src/app/gps/qgsgpsinformationwidget.h
@@ -36,6 +36,7 @@ class QextSerialPort;
 class QgsAppGpsConnection;
 class QgsGpsInformation;
 class QgsMapCanvas;
+class QgsAppGpsDigitizing;
 
 /**
  * A dock widget that displays information from a GPS device and
@@ -47,7 +48,7 @@ class APP_EXPORT QgsGpsInformationWidget: public QgsPanelWidget, private Ui::Qgs
     Q_OBJECT
   public:
 
-    QgsGpsInformationWidget( QgsAppGpsConnection *connection, QgsMapCanvas *mapCanvas, QWidget *parent = nullptr );
+    QgsGpsInformationWidget( QgsAppGpsConnection *connection, QgsMapCanvas *mapCanvas, QgsAppGpsDigitizing *digitizing = nullptr, QWidget *parent = nullptr );
     ~QgsGpsInformationWidget() override;
 
   private slots:
@@ -64,6 +65,7 @@ class APP_EXPORT QgsGpsInformationWidget: public QgsPanelWidget, private Ui::Qgs
     void gpsConnecting();
     void gpsDisconnected();
     void gpsConnected();
+    void updateTrackInformation();
 
   private:
 
@@ -72,6 +74,7 @@ class APP_EXPORT QgsGpsInformationWidget: public QgsPanelWidget, private Ui::Qgs
 
     QgsAppGpsConnection *mConnection = nullptr;
     QPointer< QgsMapCanvas > mMapCanvas;
+    QgsAppGpsDigitizing *mDigitizing = nullptr;
 
     QwtPlot *mPlot = nullptr;
     QwtPlotCurve *mCurve = nullptr;

diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
@@ -1421,7 +1421,7 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, bool skipBadLayers
   connect( mGpsSettingsMenu, &QgsAppGpsSettingsMenu::nmeaLogFileChanged, mGpsDigitizing, &QgsAppGpsDigitizing::setNmeaLogFile );
   connect( mGpsDigitizing, &QgsAppGpsDigitizing::trackIsEmptyChanged, mGpsToolBar, [ = ]( bool isEmpty ) { mGpsToolBar->setResetTrackButtonEnabled( !isEmpty ); } );
 
-  mpGpsWidget = new QgsGpsInformationWidget( mGpsConnection, mMapCanvas );
+  mpGpsWidget = new QgsGpsInformationWidget( mGpsConnection, mMapCanvas, mGpsDigitizing );
   QgsPanelWidgetStack *gpsStack = new QgsPanelWidgetStack();
   gpsStack->setMainPanel( mpGpsWidget );
   mpGpsWidget->setDockMode( true );