some UIs can be closed with ESC key

src/net/torvald/terrarum/modulebasegame/gameactors/FixtureCraftingTable.kt

@@ -1,7 +1,5 @@
 package net.torvald.terrarum.modulebasegame.gameactors
 
-import com.badlogic.gdx.Gdx
-import com.badlogic.gdx.Input
 import com.badlogic.gdx.graphics.Camera
 import com.badlogic.gdx.graphics.Color
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
@@ -38,7 +36,11 @@ internal class FixtureCraftingTable : FixtureBase(
 internal object UICraftingTable : UICanvas() {
     override var width = 512
     override var height = 512
-    override var openCloseTime: Second = 0.05f
+    override var openCloseTime: Second = 0.0f
+
+    init {
+        handler.allowESCtoClose = true
+    }
 
     override fun updateUI(delta: Float) {
 
@@ -49,10 +51,6 @@ internal object UICraftingTable : UICanvas() {
         batch.color = Color.WHITE
         batch.draw(AppLoader.resourcePool.getAsTextureRegion("test_texture"), 0f, 0f)
 
-
-        if (Gdx.input.isKeyPressed(Input.Keys.ESCAPE)) {
-            handler.setAsClose()
-        }
     }
 
     override fun doOpening(delta: Float) {

src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt

@@ -43,7 +43,9 @@ class UIInventoryFull(
     val internalWidth: Int = UIItemInventoryDynamicList.WIDTH + UIItemInventoryEquippedView.WIDTH + itemListToEquipViewGap
     val internalHeight: Int = 166 + UIItemInventoryDynamicList.HEIGHT // grad_begin..grad_end..contents..grad_begin..grad_end
 
-
+    init {
+        handler.allowESCtoClose = true
+    }
 
     internal val catIcons: TextureRegionPack = TextureRegionPack("./assets/graphics/gui/inventory/category.tga", 20, 20)
     internal val catArrangement: IntArray = intArrayOf(9,6,7,1,0,2,3,4,5,8)

src/net/torvald/terrarum/ui/UIHandler.kt

@@ -1,5 +1,7 @@
 package net.torvald.terrarum.ui
 
+import com.badlogic.gdx.Gdx
+import com.badlogic.gdx.Input
 import com.badlogic.gdx.graphics.Camera
 import com.badlogic.gdx.graphics.Color
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
@@ -17,10 +19,12 @@ import net.torvald.terrarum.modulebasegame.TerrarumIngame
  * Created by minjaesong on 2015-12-31.
  */
 class UIHandler(//var UI: UICanvas,
-                var toggleKeyLiteral: Int? = null, var toggleButtonLiteral: Int? = null,
+                var toggleKeyLiteral: Int? = null,
+                var toggleButtonLiteral: Int? = null,
                 // UI positions itself? (you must g.flush() yourself after the g.translate(Int, Int))
                 var customPositioning: Boolean = false, // mainly used by vital meter
-                var doNotWarnConstant: Boolean = false
+                var doNotWarnConstant: Boolean = false,
+                internal var allowESCtoClose: Boolean = false
 ): Disposable {
 
     // X/Y Position relative to the game window.
@@ -101,18 +105,23 @@ class UIHandler(//var UI: UICanvas,
 
     fun update(ui: UICanvas, delta: Float) {
         // open/close UI by key pressed
-        if (toggleKey != null) {
+        if (toggleKey != null && Gdx.input.isKeyJustPressed(toggleKey!!)) {
-            if (KeyToggler.isOn(toggleKey!!)) {
+            if (isClosed)
                 setAsOpen()
-            }
+            else if (isOpened)
-            else {
                 setAsClose()
-            }
+
+            // for the case of intermediate states, do nothing.
         }
         if (toggleButton != null) {
             /* */
         }
 
+        // ESC is a master key for closing
+        if (allowESCtoClose && Gdx.input.isKeyJustPressed(Input.Keys.ESCAPE) && isOpened) {
+            setAsClose()
+        }
+
 
         //if (openFired && openCloseCounter > 9) openFired = false
         //if (closeFired && openCloseCounter > 9) closeFired = false