added hardware acceleration support

refactored to work with jdk 8
changed the validator to reentrant lock

src/guiTree/Components/Decorations/Placers/MiddleRightPlacer.java

@@ -0,0 +1,64 @@
+package guiTree.Components.Decorations.Placers;
+
+import guiTree.Helper.Point2;
+import guiTree.Helper.Point4;
+
+public class MiddleRightPlacer implements Placer {
+    private Point2<Integer> size;
+    private Point2<Integer> parentSize;
+    private Point4<Integer> margin;
+
+    public MiddleRightPlacer() {
+        margin = new Point4<>(0, 0, 0, 0);
+    }
+
+    @Override
+    public void setRelativeLocation(float x, float y) {
+    }
+
+    @Override
+    public void setLocation(int x, int y) {
+    }
+
+    @Override
+    public void setElementSize(int width, int height) {
+        size = new Point2<>(width, height);
+    }
+
+    @Override
+    public void setParentSize(int width, int height) {
+        parentSize = new Point2<>(width, height);
+    }
+
+
+    @Override
+    public void setMargins(int up, int down, int left, int right) {
+        margin.a = up;
+        margin.b = down;
+        margin.c = left;
+        margin.d = right;
+    }
+
+    @Override
+    public void setMargins(int margin) {
+        this.margin.a = margin;
+        this.margin.b = margin;
+        this.margin.c = margin;
+        this.margin.d = margin;
+    }
+
+    @Override
+    public Point4<Integer> getMargins() {
+        return margin;
+    }
+
+    @Override
+    public Point2<Integer> getPosition() {
+        if(parentSize == null) {
+            return new Point2<>(margin.c, margin.a);
+        }
+        int x = parentSize.x - size.x - margin.d;
+        int y = (parentSize.y - size.y) / 2;
+        return new Point2<>(x, y);
+    }
+}