min tile area -> percent

src/Wima/Geometry/WimaMeasurementArea.h

@@ -27,12 +27,7 @@ public:
 class WimaMeasurementArea : public WimaArea {
   Q_OBJECT
 
-  enum class STATE {
-    IDLE,
-    DEFERED,
-    UPDATE,
-    RESTART,
-  };
+  enum class STATE { IDLE, DEFERED, UPDATEING, RESTARTING, STOP };
 
 public:
   WimaMeasurementArea(QObject *parent = nullptr);
@@ -71,10 +66,6 @@ public:
   void saveToJson(QJsonObject &json);
   bool loadFromJson(const QJsonObject &json, QString &errorString);
 
-  // Friends
-  friend void print(const WimaMeasurementArea &area, QString outputStr);
-  friend void print(const WimaMeasurementArea &area);
-
   // Static Variables
   static const char *settingsGroup;
   static const char *tileHeightName;
@@ -98,6 +89,8 @@ private slots:
   void doUpdate();
   void deferUpdate();
   void storeTiles();
+  void disableUpdates();
+  void enableUpdates();
 
 private:
   // Member Methodes
@@ -109,15 +102,15 @@ private:
 
   SettingsFact _tileHeight;
   SettingsFact _tileWidth;
-  SettingsFact _minTileArea;
+  SettingsFact _minTileAreaPercent; // 0..100
   SettingsFact _showTiles;
 
+  QVector<int> _progress;
+
   // Tile stuff.
   mutable QTimer _timer;
   using DataPtr = std::shared_ptr<TileData>;
+  mutable STATE _state;
   mutable TileData _tileData;
   mutable QFutureWatcher<DataPtr> _watcher;
-  mutable STATE _state;
-
-  QVector<int> _progress;
 };

src/Wima/Geometry/json/WimaMeasurementArea.SettingsGroup.json

@@ -18,31 +18,14 @@
     "defaultValue":     5
 },
 {
-    "name":             "MinTileArea",
-    "shortDescription": "The minimal allowed area of a tile",
+    "name":             "MinTileAreaPercent",
+    "shortDescription": "The minimal allowed area in percent (of width*height).",
     "type":             "double",
-    "units":            "m^2",
+    "units":            "%",
     "min":              0,
+    "max":              100,
     "decimalPlaces":    2,
-    "defaultValue":     5
-},
-{
-    "name":             "TransectDistance",
-    "shortDescription": "The transect distance",
-    "type":             "double",
-    "units":            "m",
-    "min":              0.3,
-    "decimalPlaces":    2,
-    "defaultValue":     2
-},
-{
-    "name":             "MinTransectLength",
-    "shortDescription": "The minimal transect length",
-    "type":             "double",
-    "units":            "m",
-    "min":              0,
-    "decimalPlaces":    2,
-    "defaultValue":     1
+    "defaultValue":     20
 },
 {
     "name":             "ShowTiles",