allow to hide config items from the ui and allow to change config values in the init function

lib/config/GWConfig.cpp

@@ -114,6 +114,16 @@ int GwConfigHandler::getInt(const String name,int defaultv) const{
     if (!i) return defaultv;
     return i->asInt();
 }
+void GwConfigHandler::stopChanges(){
+    allowChanges=false;
+}
+bool GwConfigHandler::setValue(String name,String value){
+    if (! allowChanges) return false;
+    GwConfigInterface *i=getConfigItem(name,false);
+    if (!i) return false;
+    i->value=value;
+    return true;
+}
 
 void GwNmeaFilter::handleToken(String token, int index){
     switch(index){

lib/config/GWConfig.h

@@ -14,11 +14,13 @@ class GwConfigHandler: public GwConfigDefinitions{
         GwLog *logger;
         typedef std::map<String,String> StringMap;
         StringMap changedValues;
+        boolean allowChanges=true;
     public:
         public:
         GwConfigHandler(GwLog *logger);
         bool loadConfig();
         bool saveConfig();
+        void stopChanges();
         bool updateValue(String name, String value);
         bool reset(bool save);
         String toString() const;
@@ -27,6 +29,12 @@ class GwConfigHandler: public GwConfigDefinitions{
         bool getBool(const String name,bool defaultv=false) const ;
         int getInt(const String name,int defaultv=0) const;
         GwConfigInterface * getConfigItem(const String name, bool dummy=false) const;
+        /**
+         * change the value of a config item
+         * will become a noop after stopChanges has been called 
+         * !use with care! no checks of the value
+         */
+        bool setValue(String name, String value);
     private:
 };
 #endif

lib/exampletask/GwExampleTask.cpp

@@ -10,6 +10,13 @@
  */
 void exampleInit(GwApi *api){
     api->getLogger()->logDebug(GwLog::LOG,"example init running");
+    //this example is a more or less useless example how you could set some
+    //config value to a fixed value
+    //you can only set config values within the init function
+    //you could also compute this value from some own configuration
+    //for this example it would make a lot of sense to declare a capability
+    //to hide this config item from the UI - see header file 
+    api->getConfig()->setValue(api->getConfig()->minXdrInterval,"50"); 
 }
 #define INVALID_COORD -99999
 class GetBoatDataRequest: public GwMessage{
@@ -84,6 +91,7 @@ void exampleTask(GwApi *api){
     bool hasPosition=false;
     bool hasPosition2=false;
     LOG_DEBUG(GwLog::DEBUG,"example switch ist %s",exampleSwitch?"true":"false");
+    LOG_DEBUG(GwLog::DEBUG,"minXdrInterval=%d",api->getConfig()->getInt(api->getConfig()->minXdrInterval));
     GwApi::BoatValue *longitude=new GwApi::BoatValue(F("Longitude"));
     GwApi::BoatValue *latitude=new GwApi::BoatValue(F("Latitude"));
     GwApi::BoatValue *testValue=new GwApi::BoatValue(boatItemName);

lib/exampletask/GwExampleTask.h

@@ -43,4 +43,7 @@ DECLARE_INITFUNCTION(exampleInit);
 //elements when this capability is set correctly
 DECLARE_CAPABILITY(testboard,true);
 DECLARE_CAPABILITY(testboard2,true);
+//hide some config value
+//just set HIDE + the name of the config item to true
+DECLARE_CAPABILITY(HIDEminXdrInterval,true);
 #endif