Support blocking zoom on map

src/ui/map/QGCMapToolBar.cc

@@ -28,6 +28,7 @@ void QGCMapToolBar::setMap(QGCMapWidget* map)
         connect(ui->goHomeButton, SIGNAL(clicked()), map, SLOT(goHome()));
         connect(ui->lastPosButton, SIGNAL(clicked()), map, SLOT(loadSettings()));
         connect(ui->clearTrailsButton, SIGNAL(clicked()), map, SLOT(deleteTrails()));
+        connect(ui->lockCheckBox, SIGNAL(clicked(bool)), map, SLOT(setZoomBlocked(bool)));
         connect(map, SIGNAL(OnTileLoadStart()), this, SLOT(tileLoadStart()));
         connect(map, SIGNAL(OnTileLoadComplete()), this, SLOT(tileLoadEnd()));
         connect(map, SIGNAL(OnTilesStillToLoad(int)), this, SLOT(tileLoadProgress(int)));

src/ui/map/QGCMapToolBar.ui

@@ -13,11 +13,20 @@
   <property name="windowTitle">
    <string>Form</string>
   </property>
-  <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,1,1,1,1,1,1,5,1,30,1">
+  <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,1,1,1,1,1,0,1,5,1,30,1">
    <property name="spacing">
     <number>2</number>
    </property>
-   <property name="margin">
+   <property name="leftMargin">
+    <number>4</number>
+   </property>
+   <property name="topMargin">
+    <number>4</number>
+   </property>
+   <property name="rightMargin">
+    <number>4</number>
+   </property>
+   <property name="bottomMargin">
     <number>4</number>
    </property>
    <item>
@@ -63,6 +72,13 @@
     </widget>
    </item>
    <item>
+    <widget class="QCheckBox" name="lockCheckBox">
+     <property name="text">
+      <string>Lock</string>
+     </property>
+    </widget>
+   </item>
+   <item>
     <widget class="QCheckBox" name="followCheckBox">
      <property name="text">
       <string>Follow</string>

src/ui/map/QGCMapWidget.cc

@@ -18,6 +18,7 @@ QGCMapWidget::QGCMapWidget(QWidget *parent) :
     mapInitialized(false),
     mapPositionInitialized(false),
     homeAltitude(0),
+    zoomBlocked(false),
     uas(NULL)
 {
     currWPManager = UASManager::instance()->getActiveUASWaypointManager();
@@ -249,6 +250,13 @@ void QGCMapWidget::hideEvent(QHideEvent* event)
     OPMapWidget::hideEvent(event);
 }
 
+void QGCMapWidget::wheelEvent ( QWheelEvent * event )
+{
+    if (!zoomBlocked) {
+        OPMapWidget::wheelEvent(event);
+    }
+}
+
 /**
  * @param changePosition Load also the last position from settings and update the map position.
  */
@@ -328,14 +336,10 @@ void QGCMapWidget::mouseDoubleClickEvent(QMouseEvent* event)
         // Create new waypoint
         internals::PointLatLng pos = map->FromLocalToLatLng(event->pos().x(), event->pos().y());
         Waypoint* wp = currWPManager->createWaypoint();
-        //            wp->blockSignals(true);
-        //            wp->setFrame(MAV_FRAME_GLOBAL_RELATIVE_ALT);
         wp->setLatitude(pos.Lat());
         wp->setLongitude(pos.Lng());
         wp->setFrame((MAV_FRAME)currWPManager->getFrameRecommendation());
         wp->setAltitude(currWPManager->getAltitudeRecommendation());
-        //            wp->blockSignals(false);
-        //            currWPManager->notifyOfChangeEditable(wp);
     }
 
     OPMapWidget::mouseDoubleClickEvent(event);

src/ui/map/QGCMapWidget.h

@@ -124,6 +124,11 @@ public slots:
         }
     }
 
+    void setZoomBlocked(bool blocked)
+    {
+        zoomBlocked = blocked;
+    }
+
     /** @brief Load the settings for this widget from disk */
     void loadSettings(bool changePosition=true);
     /** @brief Store the settings for this widget to disk */
@@ -139,6 +144,7 @@ protected:
     /** @brief Initialize */
     void showEvent(QShowEvent* event);
     void hideEvent(QHideEvent* event);
+    void wheelEvent(QWheelEvent* event);
     void mousePressEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);
     void mouseDoubleClickEvent(QMouseEvent* event);
@@ -172,6 +178,7 @@ protected:
     QPoint mousePressPos;               ///< Mouse position when the button is released.
     QPoint contextMousePressPos;        ///< Mouse position when context menu activated.
     int defaultGuidedAlt;               ///< Default altitude for guided mode
+    bool zoomBlocked;                   ///< Wether zooming is blocked
     UASInterface *uas;                  ///< Currently selected UAS.
 
 };