#12 small changes and java doc

src/main/java/ch/zhaw/gartenverwaltung/PlantsController.java

@@ -14,7 +14,6 @@ import javafx.geometry.Insets;
 import javafx.scene.control.*;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
-import javafx.scene.input.InputMethodEvent;
 import javafx.scene.layout.VBox;
 
 import java.io.IOException;
@@ -49,18 +48,25 @@ public class PlantsController implements Initializable {
     @FXML
     private TextField search_plants;
 
-
+    /**
+     * saves the current selected plant in new JSON database
+     * @param event event
+     */
     @FXML
     void saveToMyPlant(ActionEvent event) {
         //ToDo model save selectedPlant to mySelectedPlant(IO)
     }
 
     /**
+     * fill list view with current hardiness zone
+     * set default values
+     * create filter of season and hardiness zone
+     * create event listener for selected list entry and search by query
      * {@inheritDoc}
      */
     @Override
     public void initialize(URL url, ResourceBundle resourceBundle) {
-        fillPlantListWithDefaultValues();
+        fillPlantListWithHardinessZone();
 
         description_plant.setText("");
         saveToMyPlant_button.setDisable(true);
@@ -99,15 +105,28 @@ public class PlantsController implements Initializable {
         });
     }
 
+    /**
+     * get plant list according to param season and hardiness zone
+     * fill list view with plant list
+     * @param season enum of seasons
+     * @throws HardinessZoneNotSetException throws exception
+     * @throws IOException throws exception
+     */
     private void viewFilteredListBySeason(Seasons season) throws HardinessZoneNotSetException, IOException {
         List<Plant> plantList = plantListModel.getFilteredPlantListBySaisonWithoutGrowthPhase(plantListModel.getCurrentZone(), season.getStartDate(), season.getEndDate());
         fillListViewWithData(plantList);
     }
 
+    /**
+     * get plant list filtered by search plant entry and hardiness zone
+     * fill list view with plant list
+     * @throws HardinessZoneNotSetException throws exception when no hardiness zone is defined
+     * @throws IOException throws exception
+     */
     private void viewFilteredListBySearch() throws HardinessZoneNotSetException, IOException {
         search_plants.textProperty().addListener((observable, oldValue, newValue) -> {
             if (newValue.isEmpty()) {
-                fillPlantListWithDefaultValues();
+                fillPlantListWithHardinessZone();
             }else {
                 List<Plant> plantList = new LinkedList<>();
                 try {
@@ -120,7 +139,11 @@ public class PlantsController implements Initializable {
         });
     }
 
-    private void fillPlantListWithDefaultValues() {
+    /**
+     * get plant list of current hardiness zone
+     * fill list view with plant list
+     */
+    private void fillPlantListWithHardinessZone() {
         List<Plant> plantList = new LinkedList<>();
         try {
             plantList = plantListModel.getPlantList(plantListModel.getCurrentZone());
@@ -130,6 +153,11 @@ public class PlantsController implements Initializable {
         fillListViewWithData(plantList);
     }
 
+    /**
+     * creates radio buttons for the hardiness zones defined in enum HardinessZone
+     * defines default value as selected
+     * when selected filter viewList according to hardiness zone
+     */
     private void createFilterHardinessZone() {
         ToggleGroup hardinessGroup = new ToggleGroup();
         for (HardinessZone zone : HardinessZone.values()) {
@@ -143,13 +171,18 @@ public class PlantsController implements Initializable {
                 @Override
                 public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
                     plantListModel.setCurrentZone(zone);
-                    fillPlantListWithDefaultValues();
+                    fillPlantListWithHardinessZone();
                 }
             });
             climate_zones.getChildren().add(radioButton);
         }
     }
 
+    /**
+     * creates radio buttons for the seasons defined in enum Seasons
+     * defines default value as selected
+     * when selected filter viewList according to seasons
+     */
     private void createFilterSeasons() {
         ToggleGroup seasonGroup = new ToggleGroup();
         for (Seasons season : Seasons.values()) {
@@ -163,7 +196,7 @@ public class PlantsController implements Initializable {
                 @Override
                 public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
                     if (season.equals(Seasons.AllSEASONS)) {
-                        fillPlantListWithDefaultValues();
+                        fillPlantListWithHardinessZone();
                     } else {
                         try {
                             viewFilteredListBySeason(season);
@@ -179,7 +212,9 @@ public class PlantsController implements Initializable {
     }
 
     /**
-     * observes changes in the selectedProperty of ListView and updates the description label
+     * observes changes in the selectedProperty of ListView and updates:
+     * the description label
+     * image of the plant
      */
     private void lookForSelectedListEntry() {
         list_plants.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Plant>() {
@@ -189,9 +224,15 @@ public class PlantsController implements Initializable {
                     selectedPlant = newValue;
                     description_plant.setText(selectedPlant.description());
                     saveToMyPlant_button.setDisable(false);
-                    //ToDo Uncomment if plant.java can load img
+                    Image img;
-                    //Image img = selectedPlant.image();
+                    if(selectedPlant.image() != null) {
-                    //img_plant.setImage(img);
+                        img = selectedPlant.image();
+                    } else {
+                        img = new Image(String.valueOf(PlantsController.class.getResource("placeholder.png")));
+                    }
+                    img_plant.setImage(img);
+
+
                 } else {
                     selectedPlant = null;
                     description_plant.setText("");