Added keyboard shortcut to toggle World Screen UI elements (#8211)

* AbsoluteUnits - Mongolian Uniques

* Added keyboard shortcut to toggle World Screen UI elements

Ctrl+U to toggle

* Update WorldScreen.kt

* Added a pesky space

* Remove "Experimental" warning text

* Revert "Remove "Experimental" warning text"

This reverts commit 3c8456db95.

android/assets/jsons/Tutorials.json

@@ -232,7 +232,7 @@
     "If you have a keyboard, some shortcut keys become available. Unit command or improvement picker keys, for example, are shown directly in their corresponding buttons.",
     "On the world screen the hotkeys are as follows:", "Space or 'N' - Next unit or turn\n'E' - Empire overview (last viewed page)\n'+', '-' - Zoom in / out\nHome - center on capital or open its city screen if already centered",
     "F1 - Open Civilopedia\nF2 - Empire overview Trades\nF3 - Empire overview Units\nF4 - Empire overview Diplomacy\nF5 - Social policies\nF6 - Technologies\nF7 - Empire overview Cities\nF8 - Victory Progress\nF9 - Empire overview Stats\nF10 - Empire overview Resources\nF11 - Quicksave\nF12 - Quickload",
-    "Ctrl-R - Toggle tile resource display\nCtrl-Y - Toggle tile yield display\nCtrl-O - Game options\nCtrl-S - Save game\nCtrl-L - Load game"
+    "Ctrl-R - Toggle tile resource display\nCtrl-Y - Toggle tile yield display\nCtrl-O - Game options\nCtrl-S - Save game\nCtrl-L - Load game\nCtrl-U - Toggle UI (World Screen only)"
     ]
   },
   {

android/assets/jsons/translations/template.properties

@@ -1425,6 +1425,7 @@ Pillaging this improvement yields [stats] =
 Pillaging this improvement yields approximately [stats] = 
 Needs removal of terrain features to be built = 
 Unit type = 
+Toggle UI (World Screen only) = 
 
 # Policies
 

core/src/com/unciv/ui/worldscreen/WorldScreen.kt

@@ -133,6 +133,8 @@ class WorldScreen(
 
     private val events = EventBus.EventReceiver()
 
+    var uiEnabled = true
+
 
     init {
         // notifications are right-aligned, they take up only as much space as necessary.
@@ -254,6 +256,21 @@ class WorldScreen(
         globalShortcuts.add(KeyCharAndCode.ctrl('Q')) { game.popScreen() }    //   WorldScreen is the last screen, so this quits
         globalShortcuts.add(Input.Keys.NUMPAD_ADD) { this.mapHolder.zoomIn() }    //   '+' Zoom
         globalShortcuts.add(Input.Keys.NUMPAD_SUBTRACT) { this.mapHolder.zoomOut() }    //   '-' Zoom
+
+        globalShortcuts.add(KeyCharAndCode.ctrl('U')){
+            uiEnabled = !uiEnabled
+            topBar.isVisible = uiEnabled
+            statusButtons.isVisible = uiEnabled
+            techPolicyAndDiplomacy.isVisible = uiEnabled
+            tutorialTaskTable.isVisible = uiEnabled
+            bottomTileInfoTable.isVisible = uiEnabled
+            unitActionsTable.isVisible = uiEnabled
+            notificationsScroll.isVisible = uiEnabled
+            minimapWrapper.isVisible = uiEnabled
+            bottomUnitTable.isVisible = uiEnabled
+            battleTable.isVisible = uiEnabled && battleTable.update() != hide()
+            fogOfWarButton.isVisible = uiEnabled && viewingCiv.isSpectator()
+        }
     }
 
     private fun addKeyboardListener() {
@@ -362,35 +379,37 @@ class WorldScreen(
     // and we don't get any silly concurrency problems!
     private fun update() {
 
-        displayTutorialsOnUpdate()
+        if(uiEnabled){
+            displayTutorialsOnUpdate()
 
-        bottomUnitTable.update()
-        bottomTileInfoTable.updateTileTable(mapHolder.selectedTile)
-        bottomTileInfoTable.x = stage.width - bottomTileInfoTable.width
-        bottomTileInfoTable.y = if (game.settings.showMinimap) minimapWrapper.height else 0f
-        battleTable.update()
+            bottomUnitTable.update()
+            bottomTileInfoTable.updateTileTable(mapHolder.selectedTile)
+            bottomTileInfoTable.x = stage.width - bottomTileInfoTable.width
+            bottomTileInfoTable.y = if (game.settings.showMinimap) minimapWrapper.height else 0f
+            battleTable.update()
 
-        updateSelectedCiv()
+            updateSelectedCiv()
 
-        tutorialTaskTable.clear()
-        val tutorialTask = getCurrentTutorialTask()
-        if (tutorialTask == "" || !game.settings.showTutorials || viewingCiv.isDefeated()) {
-            tutorialTaskTable.isVisible = false
-        } else {
-            tutorialTaskTable.isVisible = true
-            tutorialTaskTable.add(tutorialTask.toLabel()
+            tutorialTaskTable.clear()
+            val tutorialTask = getCurrentTutorialTask()
+            if (tutorialTask == "" || !game.settings.showTutorials || viewingCiv.isDefeated()) {
+                tutorialTaskTable.isVisible = false
+            } else {
+                tutorialTaskTable.isVisible = true
+                tutorialTaskTable.add(tutorialTask.toLabel()
                     .apply { setAlignment(Align.center) }).pad(10f)
-            tutorialTaskTable.pack()
-            tutorialTaskTable.centerX(stage)
-            tutorialTaskTable.y = topBar.y - tutorialTaskTable.height
+                tutorialTaskTable.pack()
+                tutorialTaskTable.centerX(stage)
+                tutorialTaskTable.y = topBar.y - tutorialTaskTable.height
+            }
+
+            if (fogOfWar) minimapWrapper.update(selectedCiv)
+            else minimapWrapper.update(viewingCiv)
+
+            unitActionsTable.update(bottomUnitTable.selectedUnit)
+            unitActionsTable.y = bottomUnitTable.height
         }
 
-        if (fogOfWar) minimapWrapper.update(selectedCiv)
-        else minimapWrapper.update(viewingCiv)
-
-        unitActionsTable.update(bottomUnitTable.selectedUnit)
-        unitActionsTable.y = bottomUnitTable.height
-
         mapHolder.resetArrows()
         if (UncivGame.Current.settings.showUnitMovements) {
             val allUnits = gameInfo.civilizations.asSequence().flatMap { it.getCivUnits() }