(#18): create hud for gameplay class

frontend/core/src/com/game/tankwars/view/GameHud.java

+package com.game.tankwars.view;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.graphics.g2d.SpriteBatch;
+import com.badlogic.gdx.scenes.scene2d.Stage;
+import com.badlogic.gdx.scenes.scene2d.ui.Button;
+import com.badlogic.gdx.scenes.scene2d.ui.HorizontalGroup;
+import com.badlogic.gdx.scenes.scene2d.ui.Label;
+import com.badlogic.gdx.scenes.scene2d.ui.ProgressBar;
+import com.badlogic.gdx.scenes.scene2d.ui.Skin;
+import com.badlogic.gdx.scenes.scene2d.ui.Slider;
+import com.badlogic.gdx.scenes.scene2d.ui.Table;
+import com.badlogic.gdx.scenes.scene2d.ui.TextButton;
+import com.badlogic.gdx.utils.viewport.Viewport;
+import com.ray3k.stripe.FreeTypeSkin;
+
+public class GameHud {
+
+    private Stage stage;
+
+    private Table table;
+
+    private Skin skin;
+
+    private ProgressBar healthProgressBarPlayer;
+    private ProgressBar healthProgressBarOpponent;
+
+
+    private TextButton fireButton;
+
+    private HorizontalGroup powerContainer;
+    private Label powerLabel;
+    private Slider powerSlider;
+
+    private Button moveLeft;
+    private Button moveRight;
+    private HorizontalGroup moveContainer;
+
+    public GameHud(Viewport viewport, SpriteBatch batch) {
+        stage = new Stage(viewport, batch);
+
+        table = new Table();
+        table.setFillParent(true);
+        table.setDebug(true);
+
+        stage.addActor(table);
+
+        skin = new FreeTypeSkin(Gdx.files.internal("gameplay-skin.json"));
+
+        healthProgressBarPlayer = new ProgressBar(0, 100, 1, false, skin);
+        healthProgressBarPlayer.setValue(40);
+        healthProgressBarOpponent = new ProgressBar(0, 100, 1, false, skin);
+        healthProgressBarOpponent.setValue(40);
+
+        table.add(healthProgressBarPlayer).expand().top().left().padTop(10).padLeft(10);
+        table.add(healthProgressBarOpponent).expand().top().right().padTop(10).padRight(10);
+
+        table.row();
+
+        fireButton = new TextButton("Fire!", skin);
+        table.add(fireButton).expand().bottom().left().padLeft(10).padBottom(10);
+
+        powerLabel = new Label("Power", skin.get("roboto-black-white", Label.LabelStyle.class));
+        powerSlider = new Slider(0, 100, 1, false, skin);
+
+        powerContainer = new HorizontalGroup().space(10);
+        powerContainer.addActor(powerLabel);
+        powerContainer.addActor(powerSlider);
+
+        table.add(powerContainer).expand().bottom().padBottom(10);
+
+        moveLeft = new Button(skin.get("move-left", Button.ButtonStyle.class));
+        moveRight = new Button(skin.get("move-right", Button.ButtonStyle.class));
+
+        moveContainer = new HorizontalGroup().space(10);
+        moveContainer.addActor(moveLeft);
+        moveContainer.addActor(moveRight);
+
+        table.add(moveContainer).expand().bottom().right().padBottom(10).padRight(10);
+
+    }
+
+    public Stage getStage() {
+        return stage;
+    }
+
+    public Skin getSkin() {
+        return skin;
+    }
+
+    public TextButton getFireButton() {
+        return fireButton;
+    }
+
+    public Slider getPowerSlider() {
+        return powerSlider;
+    }
+
+    public Button getMoveLeft() {
+        return moveLeft;
+    }
+
+    public Button getMoveRight() {
+        return moveRight;
+    }
+}