it is done

core/src/mindustry/ui/Bar.java

@@ -0,0 +1,103 @@
+package mindustry.ui;
+
+import arc.*;
+import arc.func.*;
+import arc.graphics.*;
+import arc.graphics.g2d.*;
+import arc.math.*;
+import arc.math.geom.*;
+import arc.scene.*;
+import arc.scene.style.*;
+import arc.util.pooling.*;
+import mindustry.gen.*;
+
+public class Bar extends Element{
+    private static Rectangle scissor = new Rectangle();
+
+    private Floatp fraction;
+    private String name = "";
+    private float value, lastValue, blink;
+    private Color blinkColor = new Color();
+
+    public Bar(String name, Color color, Floatp fraction){
+        this.fraction = fraction;
+        this.name = Core.bundle.get(name);
+        this.blinkColor.set(color);
+        lastValue = value = fraction.get();
+        setColor(color);
+    }
+
+    public Bar(Prov<String> name, Prov<Color> color, Floatp fraction){
+        this.fraction = fraction;
+        lastValue = value = Mathf.clamp(fraction.get());
+        update(() -> {
+            this.name = name.get();
+            this.blinkColor.set(color.get());
+            setColor(color.get());
+        });
+    }
+
+    public Bar(){
+
+    }
+
+    public void reset(float value){
+        this.value = lastValue = blink = value;
+    }
+
+    public void set(Prov<String> name, Floatp fraction, Color color){
+        this.fraction = fraction;
+        this.lastValue = fraction.get();
+        this.blinkColor.set(color);
+        setColor(color);
+        update(() -> this.name = name.get());
+    }
+
+    public Bar blink(Color color){
+        blinkColor.set(color);
+        return this;
+    }
+
+    @Override
+    public void draw(){
+        if(fraction == null) return;
+
+        float computed = Mathf.clamp(fraction.get());
+        if(!Mathf.equal(lastValue, computed)){
+            blink = 1f;
+            lastValue = computed;
+        }
+
+        blink = Mathf.lerpDelta(blink, 0f, 0.2f);
+        value = Mathf.lerpDelta(value, computed, 0.15f);
+
+        Drawable bar = Tex.bar;
+
+        Draw.colorl(0.1f);
+        bar.draw(x, y, width, height);
+        Draw.color(color, blinkColor, blink);
+
+        Drawable top = Tex.barTop;
+        float topWidth = width * value;
+
+        if(topWidth > Core.atlas.find("bar-top").getWidth()){
+            top.draw(x, y, topWidth, height);
+        }else{
+            if(ScissorStack.pushScissors(scissor.set(x, y, topWidth, height))){
+                top.draw(x, y, Core.atlas.find("bar-top").getWidth(), height);
+                ScissorStack.popScissors();
+            }
+        }
+
+        Draw.color();
+
+        BitmapFont font = Fonts.outline;
+        GlyphLayout lay = Pools.obtain(GlyphLayout.class, GlyphLayout::new);
+        lay.setText(font, name);
+
+        font.setColor(Color.white);
+        font.draw(name, x + width / 2f - lay.width / 2f, y + height / 2f + lay.height / 2f + 1);
+
+        Pools.free(lay);
+    }
+}