Various Loadscreens WIP

src/net/torvald/terrarum/LoadScreenBase.kt

@@ -0,0 +1,67 @@
+package net.torvald.terrarum
+
+import com.badlogic.gdx.Gdx
+import com.badlogic.gdx.ScreenAdapter
+import com.badlogic.gdx.graphics.OrthographicCamera
+import net.torvald.util.CircularArray
+
+open class LoadScreenBase : ScreenAdapter() {
+
+    open var screenToLoad: IngameInstance? = null
+    open lateinit var screenLoadingThread: Thread
+
+    internal val messages = CircularArray<String>(20, true)
+
+    fun addMessage(msg: String) {
+        messages.appendHead(msg)
+    }
+
+    internal var errorTrapped = false
+    internal var doContextChange = false
+
+    var camera = OrthographicCamera(AppLoader.screenW.toFloat(), AppLoader.screenH.toFloat())
+
+    override fun show() {
+        messages.clear()
+        doContextChange = false
+
+        if (screenToLoad == null) {
+            println("[LoadScreen] Screen to load is not set. Are you testing the UI?")
+        }
+        else {
+            val runnable = {
+                try {
+                    screenToLoad!!.show()
+                }
+                catch (e: Exception) {
+                    addMessage("$ccR$e")
+                    errorTrapped = true
+
+                    System.err.println("Error while loading:")
+                    e.printStackTrace()
+                }
+            }
+            screenLoadingThread = Thread(runnable, "LoadScreen GameLoader")
+
+            screenLoadingThread.start()
+        }
+
+
+        initViewPort(AppLoader.screenW, AppLoader.screenH)
+    }
+
+    fun initViewPort(width: Int, height: Int) {
+        // Set Y to point downwards
+        camera.setToOrtho(true, width.toFloat(), height.toFloat())
+
+        // Update camera matrix
+        camera.update()
+
+        // Set viewport to restrict drawing
+        Gdx.gl20.glViewport(0, 0, width, height)
+    }
+
+    override fun resize(width: Int, height: Int) {
+        initViewPort(AppLoader.screenW, AppLoader.screenH)
+    }
+}