Adding more implementations and fixes

src/main/java/org/saturnclient/ui/anim/SlideX.java

@@ -0,0 +1,39 @@
+package org.saturnclient.ui.anim;
+
+import org.saturnclient.config.AnimationConfig;
+import org.saturnclient.ui.Element;
+
+public class SlideX extends Animation {
+    int offset = 20;
+    double startX;
+
+    public SlideX(AnimationConfig config) {
+        super(config);
+    }
+
+    public SlideX(AnimationConfig config, int offset) {
+        super(config);
+        this.offset = offset;
+    }
+
+    public SlideX(int duration) {
+        super(duration);
+    }
+
+    public SlideX(int duration, int offset) {
+        super(duration);
+        this.offset = offset;
+    }
+
+    @Override
+    public void init(Element element) {
+        startX = element.x - offset;
+        element.x = (int) startX;
+    }
+
+    @Override
+    public void tick(double progress, Element element) {
+        double currentX = startX + offset * progress;
+        element.x = (int) currentX;
+    }
+}