From 8c23ae27e803e75abebcc4a72494200f30e2a5ec Mon Sep 17 00:00:00 2001
From: Jeddunk <jedithug985@cock.li>
Date: Fri, 28 Aug 2020 18:32:39 +0200
Subject: [PATCH] Improved language combobox

---
 src/main/java/Controller.java | 66 +++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/src/main/java/Controller.java b/src/main/java/Controller.java
index 6057d95..79b4516 100644
--- a/src/main/java/Controller.java
+++ b/src/main/java/Controller.java
@@ -16,9 +16,13 @@
 import de.jensd.fx.glyphs.fontawesome.FontAwesomeIconView;
 import javafx.beans.value.ChangeListener;
 import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
 import javafx.concurrent.Service;
 import javafx.concurrent.Task;
+import javafx.event.Event;
 import javafx.fxml.FXML;
+import javafx.scene.input.KeyCode;
+import javafx.scene.input.KeyEvent;
 import javafx.scene.paint.Color;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
@@ -44,6 +48,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.NoSuchElementException;
 import java.util.Objects;
+import java.util.stream.Stream;
 
 public class Controller {
 
@@ -109,6 +114,9 @@ public class Controller {
     public void initialize() {
         appId_textfield.textProperty().addListener(appIdChangesGameName());
         language_combobox.setItems(FXCollections.observableArrayList(config.getLanguages()));
+        language_combobox.setTooltip(new Tooltip());
+        language_combobox.setEditable(false);
+        new ComboBoxAutoComplete<>(language_combobox);
         //retrieveDlcList_button.setDisable(true); // WIP
         generate_tooltips();
         fix_dlc_textarea_prompt_text();
@@ -442,4 +450,62 @@ public class Controller {
     public void resetFromButton() {
         reset(false);
     }
+
+    static class ComboBoxAutoComplete<T> {
+
+        private ComboBox<T> cmb;
+        String filter = "";
+        private ObservableList<T> originalItems;
+
+        public ComboBoxAutoComplete(ComboBox<T> cmb) {
+            this.cmb = cmb;
+            originalItems = FXCollections.observableArrayList(cmb.getItems());
+            cmb.setTooltip(new Tooltip());
+            cmb.setOnKeyPressed(this::handleOnKeyPressed);
+            cmb.setOnHidden(this::handleOnHiding);
+        }
+
+        public void handleOnKeyPressed(KeyEvent e) {
+            SingleSelectionModel<T> sm = this.cmb.getSelectionModel();
+            ObservableList<T> filteredList = FXCollections.observableArrayList();
+            KeyCode code = e.getCode();
+
+            if (code.isLetterKey()) {
+                filter += e.getText();
+            }
+            if (code == KeyCode.BACK_SPACE && filter.length() > 0) {
+                filter = filter.substring(0, filter.length() - 1);
+                cmb.getItems().setAll(originalItems);
+            }
+            if (code == KeyCode.ESCAPE) {
+                filter = "";
+            }
+            if (filter.length() == 0) {
+                filteredList = originalItems;
+                cmb.getTooltip().hide();
+            } else {
+                Stream<T> items = cmb.getItems().stream();
+                String txtUsr = filter.toLowerCase();
+                items.filter(el -> el.toString().toLowerCase().contains(txtUsr)).forEach(filteredList::add);
+                cmb.getTooltip().setText(txtUsr);
+                Window stage = cmb.getScene().getWindow();
+                double posX = stage.getX() + cmb.getBoundsInParent().getMinX();
+                double posY = stage.getY() + cmb.getBoundsInParent().getMinY();
+                cmb.getTooltip().show(stage, posX, posY);
+                cmb.show();
+            }
+            cmb.getItems().setAll(filteredList);
+            sm.selectFirst();
+        }
+
+        public void handleOnHiding(Event e) {
+            filter = "";
+            cmb.getTooltip().hide();
+            T s = cmb.getSelectionModel().getSelectedItem();
+            cmb.getItems().setAll(originalItems);
+            cmb.getSelectionModel().select(s);
+        }
+
+    }
+
 }