queueing for notifications

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

@@ -4,7 +4,9 @@ import com.badlogic.gdx.graphics.Camera
 import com.badlogic.gdx.graphics.Color
 import com.badlogic.gdx.graphics.OrthographicCamera
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
+import com.badlogic.gdx.utils.Queue
 import net.torvald.terrarum.App
+import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.Second
 import net.torvald.terrarum.blendNormalStraightAlpha
 import net.torvald.terrarum.ui.Toolkit
@@ -12,6 +14,8 @@ import net.torvald.terrarum.ui.UICanvas
 import kotlin.math.max
 
 /**
+ * This UI must be always updated; the easiest way is to set `handler.alwaysUpdate` to `true`
+ *
  * Created by minjaesong on 2016-01-23.
  */
 class Notification : UICanvas() {
@@ -34,20 +38,31 @@ class Notification : UICanvas() {
     ) / 1000f
     private var displayTimer = 0f
 
-    internal var message: List<String> = listOf("")
+    internal val messageQueue = Queue<List<String>>()
+    private var messageDisplaying: List<String>? = null
 
     private val timeGaugeCol = Color(0x707070ff)
 
     init {
+        handler.alwaysUpdate = true
     }
 
     override fun updateUI(delta: Float) {
+        if (messageDisplaying == null && messageQueue.notEmpty() && handler.isClosed) {
+            messageDisplaying = messageQueue.removeFirst()
+            displayTimer = 0f
+            handler.openCloseCounter = 0f
+            handler.opacity = 0f
+            handler.setAsOpen()
+        }
+
         if (handler.isOpened)
             displayTimer += delta
 
         if (displayTimer >= visibleTime) {
             handler.setAsClose()
             displayTimer = 0f
+            messageDisplaying = null
         }
     }
 
@@ -55,35 +70,46 @@ class Notification : UICanvas() {
         blendNormalStraightAlpha(batch)
         fontCol.a = handler.opacity * OPACITY
 
-        val realTextWidth = 12 + if (message.size == 1)
-            App.fontGame.getWidth(message[0])
-        else
-            message.map { App.fontGame.getWidth(it) }.sorted().last()
-        val displayedTextWidth = max(240, realTextWidth)
 
-        // force the UI to the centre of the screen
-        this.posX = (App.scr.width - displayedTextWidth) / 2
-        val textHeight = message.size * App.fontGame.lineHeight
+        if (messageDisplaying != null) {
+
+            val realTextWidth = 12 + if (messageDisplaying!!.size == 1)
+                App.fontGame.getWidth(messageDisplaying!![0])
+            else
+                messageDisplaying!!.map { App.fontGame.getWidth(it) }.sorted().last()
+            val displayedTextWidth = max(240, realTextWidth)
+
+            // force the UI to the centre of the screen
+            this.posX = (App.scr.width - displayedTextWidth) / 2
+            val textHeight = messageDisplaying!!.size * App.fontGame.lineHeight
 
 
 
-        Toolkit.drawBaloon(batch, 0f, -textHeight, displayedTextWidth.toFloat(), textHeight, handler.opacity * OPACITY)
+            Toolkit.drawBaloon(
+                batch,
+                0f,
+                -textHeight,
+                displayedTextWidth.toFloat(),
+                textHeight,
+                handler.opacity * OPACITY
+            )
 
-        // draw time gauge
-        if (displayTimer != 0f) {
-            batch.color = timeGaugeCol
-            val time = 1f - (displayTimer / visibleTime)
-            val bw = displayedTextWidth * time
-            val bx = (displayedTextWidth - bw) / 2
-            Toolkit.drawStraightLine(batch, bx, 2f, bx + bw, 2f, false)
-        }
+            // draw time gauge
+            if (displayTimer != 0f) {
+                batch.color = timeGaugeCol
+                val time = 1f - (displayTimer / visibleTime)
+                val bw = displayedTextWidth * time
+                val bx = (displayedTextWidth - bw) / 2
+                Toolkit.drawStraightLine(batch, bx, 2f, bx + bw, 2f, false)
+            }
 
-        // draw texts
-        batch.color = fontCol
-        message.forEachIndexed { index, s ->
-            val xoff = 6 + (displayedTextWidth - realTextWidth) / 2
-            val y = -textHeight + App.fontGame.lineHeight * index
-            App.fontGame.draw(batch, s, LRmargin + xoff, y - 1)
+            // draw texts
+            batch.color = fontCol
+            messageDisplaying!!.forEachIndexed { index, s ->
+                val xoff = 6 + (displayedTextWidth - realTextWidth) / 2
+                val y = -textHeight + App.fontGame.lineHeight * index
+                App.fontGame.draw(batch, s, LRmargin + xoff, y - 1)
+            }
         }
 
 
@@ -108,10 +134,7 @@ class Notification : UICanvas() {
     }
     
     fun sendNotification(message: List<String>) {
-        this.message = message
-        handler.openCloseCounter = 0f
-        handler.opacity = 0f
-        handler.setAsOpen()
+        messageQueue.addLast(message)
     }
 
     override fun dispose() {

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

@@ -33,6 +33,8 @@ class UIHandler(//var UI: UICanvas,
         var uiTogglerFunctionDefault: ((UIHandler) -> Unit)? = null
 ): Disposable {
 
+    var alwaysUpdate = false
+
     companion object {
         private val SHADER_PROG_FRAG = """
 #ifdef GL_ES
@@ -224,7 +226,7 @@ void main() {
         //if (closeFired && openCloseCounter > 9) closeFired = false
 
 
-        if (isVisible) {
+        if (isVisible || alwaysUpdate) {
             ui.updateUI(delta)
         }
 
@@ -344,6 +346,8 @@ void main() {
             isVisible = true
 
             openFired = true
+
+            openCloseCounter = 0f
         }
     }
 
@@ -360,6 +364,8 @@ void main() {
             isOpening = false
 
             closeFired = true
+
+            openCloseCounter = 0f
         }
     }