uiitem toggle button impl

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

@@ -0,0 +1,104 @@
+package net.torvald.terrarum.ui
+
+import com.badlogic.gdx.Gdx
+import com.badlogic.gdx.graphics.Camera
+import com.badlogic.gdx.graphics.Color
+import com.badlogic.gdx.graphics.Texture
+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+import net.torvald.terrarum.CommonResourcePool
+import net.torvald.terrarum.blendNormal
+import net.torvald.terrarum.toInt
+import kotlin.math.roundToInt
+
+/**
+ * Created by Torvald on 2019-10-17.
+ */
+class UIItemToggleButton(
+        parent: UICanvas,
+        override var posX: Int,
+        override var posY: Int,
+        private var status: Boolean = false
+) : UIItem(parent) {
+
+    init {
+        CommonResourcePool.addToLoadingList("ui_item_toggler_base") {
+            Texture(Gdx.files.internal("./assets/graphics/gui/toggler_back.tga"))
+        }
+        CommonResourcePool.addToLoadingList("ui_item_toggler_handle") {
+            Texture(Gdx.files.internal("./assets/graphics/gui/toggler_switch.tga"))
+        }
+        CommonResourcePool.loadAll()
+    }
+
+    override val width: Int
+        get() = togglerBase.width
+    override val height: Int
+        get() = togglerBase.height
+    override var oldPosX = posX
+    override var oldPosY = posY
+
+    private var togglerBase = CommonResourcePool.getAsTexture("ui_item_toggler_base")
+    private var togglerHandle = CommonResourcePool.getAsTexture("ui_item_toggler_handle")
+
+    private var handleTravelDist = togglerBase.width - togglerHandle.width
+    private var handlePos = handleTravelDist * status.toInt()
+
+    private var animTimer = 0f
+    private var animLength = 0.1f
+
+    private var animCalled = false
+
+    fun getStatus() = status
+
+    fun setAsTrue() {
+        animCalled = true
+        animTimer = 0f
+        status = true
+    }
+
+    fun setAsFalse() {
+        animCalled = true
+        animTimer = 0f
+        status = false
+    }
+
+    fun toggle() {
+        if (status) setAsFalse() else setAsTrue()
+    }
+
+    override fun update(delta: Float) {
+        super.update(delta)
+
+        // make things move
+        if (animCalled) {
+            handlePos = if (status)
+                ((animTimer / animLength) * handleTravelDist).roundToInt()
+            else
+                handleTravelDist - ((animTimer / animLength) * handleTravelDist).roundToInt()
+
+            animTimer += delta
+        }
+
+        if (animTimer >= animLength) {
+            handlePos = handleTravelDist * status.toInt()
+            animCalled = false
+        }
+
+        oldPosX = posX
+        oldPosY = posY
+    }
+
+    override fun render(batch: SpriteBatch, camera: Camera) {
+        batch.color = Color.WHITE
+        blendNormal(batch)
+
+        batch.draw(togglerBase, posX.toFloat(), posY.toFloat())
+        batch.draw(togglerHandle, (posX + handlePos).toFloat(), posY.toFloat())
+
+
+        super.render(batch, camera)
+    }
+
+    override fun dispose() {
+    }
+}