working animations

src/main/java/org/saturnclient/ui2/anim/SlideY.java

@@ -0,0 +1,42 @@
+package org.saturnclient.ui2.anim;
+
+import org.saturnclient.ui2.Element;
+
+public class SlideY extends Animation {
+    int offset = 20;
+    int maxOffset = 20;
+    int elementY;
+
+    public SlideY(int duration) {
+        super(duration);
+    }
+
+    public SlideY(int duration, int offset) {
+        super(duration);
+
+        this.offset = offset;
+        this.maxOffset = offset;
+    }
+
+    public SlideY(int duration, int offset, int maxOffset) {
+        super(duration);
+
+        this.offset = offset;
+        this.maxOffset = offset;
+    }
+    
+    @Override
+    public void tick(float progress, Element element) {
+        if (progress > 0) {
+            element.y = elementY + Math.min(maxOffset, (int) (offset * progress));
+        } else {
+            element.y = elementY + Math.max(-offset, (int) (offset * progress));
+        }
+    }
+
+    @Override
+    public void init(Element element) {
+        element.y += offset;
+        elementY = element.y;
+    }
+}