Create basic GUI components

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/Component.java

@@ -0,0 +1,214 @@
+package com.bartlomiejpluta.base.api.game.gui;
+
+public abstract class Component implements Widget {
+   protected Widget parent;
+
+   protected float absX;
+   protected float absY;
+
+   protected float width;
+   protected float height;
+
+   protected float marginTop;
+   protected float marginRight;
+   protected float marginBottom;
+   protected float marginLeft;
+
+   protected float paddingTop;
+   protected float paddingRight;
+   protected float paddingBottom;
+   protected float paddingLeft;
+
+   @Override
+   public Widget getParent() {
+      return parent;
+   }
+
+   public void setParent(Widget parent) {
+      this.parent = parent;
+   }
+
+   @Override
+   public float getAbsoluteX() {
+      return absX;
+   }
+
+   @Override
+   public float getAbsoluteY() {
+      return absY;
+   }
+
+   @Override
+   public void setAbsoluteX(float x) {
+      this.absX = x;
+   }
+
+   @Override
+   public void setAbsoluteY(float y) {
+      this.absY = y;
+   }
+
+   @Override
+   public float getWidth() {
+      return width;
+   }
+
+   @Override
+   public float getHeight() {
+      return height;
+   }
+
+   @Override
+   public void setWidth(float width) {
+      this.width = width;
+   }
+
+   @Override
+   public void setHeight(float height) {
+      this.height = height;
+   }
+
+   @Override
+   public void setMargin(float top, float right, float bottom, float left) {
+      this.marginTop = top;
+      this.marginRight = right;
+      this.marginBottom = bottom;
+      this.marginLeft = left;
+   }
+
+   @Override
+   public void setMargin(float top, float rightLeft, float bottom) {
+      this.marginTop = top;
+      this.marginRight = rightLeft;
+      this.marginBottom = bottom;
+      this.marginLeft = rightLeft;
+   }
+
+   @Override
+   public void setMargin(float topBottom, float rightLeft) {
+      this.marginTop = topBottom;
+      this.marginRight = rightLeft;
+      this.marginBottom = topBottom;
+      this.marginLeft = rightLeft;
+   }
+
+   @Override
+   public void setMargin(float all) {
+      this.marginTop = all;
+      this.marginRight = all;
+      this.marginBottom = all;
+      this.marginLeft = all;
+   }
+
+   @Override
+   public void setMarginTop(float margin) {
+      this.marginTop = margin;
+   }
+
+   @Override
+   public void setMarginRight(float margin) {
+      this.marginRight = margin;
+   }
+
+   @Override
+   public void setMarginBottom(float margin) {
+      this.marginBottom = margin;
+   }
+
+   @Override
+   public void setMarginLeft(float margin) {
+      this.marginLeft = margin;
+   }
+
+   @Override
+   public float getMarginTop() {
+      return marginTop;
+   }
+
+   @Override
+   public float getMarginRight() {
+      return marginRight;
+   }
+
+   @Override
+   public float getMarginBottom() {
+      return marginBottom;
+   }
+
+   @Override
+   public float getMarginLeft() {
+      return marginLeft;
+   }
+
+   @Override
+   public void setPadding(float top, float right, float bottom, float left) {
+      this.paddingTop = top;
+      this.paddingRight = right;
+      this.paddingBottom = bottom;
+      this.paddingLeft = left;
+   }
+
+   @Override
+   public void setPadding(float top, float rightLeft, float bottom) {
+      this.paddingTop = top;
+      this.paddingRight = rightLeft;
+      this.paddingBottom = bottom;
+      this.paddingLeft = rightLeft;
+   }
+
+   @Override
+   public void setPadding(float topBottom, float rightLeft) {
+      this.paddingTop = topBottom;
+      this.paddingRight = rightLeft;
+      this.paddingBottom = topBottom;
+      this.paddingLeft = rightLeft;
+   }
+
+   @Override
+   public void setPadding(float all) {
+      this.paddingTop = all;
+      this.paddingRight = all;
+      this.paddingBottom = all;
+      this.paddingLeft = all;
+   }
+
+   @Override
+   public void setPaddingTop(float padding) {
+      this.paddingTop = padding;
+   }
+
+   @Override
+   public void setPaddingRight(float padding) {
+      this.paddingRight = padding;
+   }
+
+   @Override
+   public void setPaddingBottom(float padding) {
+      this.paddingBottom = padding;
+   }
+
+   @Override
+   public void setPaddingLeft(float padding) {
+      this.paddingLeft = padding;
+   }
+
+   @Override
+   public float getPaddingTop() {
+      return paddingTop;
+   }
+
+   @Override
+   public float getPaddingRight() {
+      return paddingRight;
+   }
+
+   @Override
+   public float getPaddingBottom() {
+      return paddingBottom;
+   }
+
+   @Override
+   public float getPaddingLeft() {
+      return paddingLeft;
+   }
+}

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/Container.java

@@ -0,0 +1,13 @@
+package com.bartlomiejpluta.base.api.game.gui;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public abstract class Container extends Component {
+   protected final List<Component> children = new LinkedList<>();
+
+   public void addChild(Component component) {
+      this.children.add(component);
+      component.setParent(this);
+   }
+}

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/GUI.java

@@ -8,6 +8,8 @@ public interface GUI extends Renderable, Disposable {
 
    void setRoot(Widget root);
 
+   void beginPath();
+
    void drawRectangle(float x, float y, float w, float h);
 
    void fillColor(Color color);

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/HBox.java

@@ -0,0 +1,48 @@
+package com.bartlomiejpluta.base.api.game.gui;
+
+import com.bartlomiejpluta.base.api.game.screen.Screen;
+
+public class HBox extends Container {
+
+   @Override
+   public float getWidth() {
+      var childrenWidth = 0.0f;
+
+      for (var child : children) {
+         childrenWidth += child.getMarginLeft() + child.getWidth() + child.getMarginRight();
+      }
+
+      return paddingLeft + childrenWidth + paddingRight;
+   }
+
+   @Override
+   public float getHeight() {
+      var theHighestChild = 0.0f;
+
+      for (var child : children) {
+         var height = child.getMarginTop() + child.getHeight() + child.getMarginBottom();
+         if (height > theHighestChild) {
+            theHighestChild = height;
+         }
+      }
+
+      return paddingTop + theHighestChild + paddingBottom;
+   }
+
+   @Override
+   public void draw(Screen screen, GUI gui) {
+      var currentX = absX + paddingLeft;
+      var currentY = absY + paddingTop;
+
+      for (var child : children) {
+         var childAbsX = currentX + child.getMarginLeft();
+         var childAbsY = currentY + child.getMarginTop();
+         child.setAbsoluteX(childAbsX);
+         child.setAbsoluteY(childAbsY);
+
+         currentX += child.getMarginLeft() + child.getWidth() + child.getMarginRight();
+
+         child.draw(screen, gui);
+      }
+   }
+}

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/VBox.java

@@ -0,0 +1,48 @@
+package com.bartlomiejpluta.base.api.game.gui;
+
+import com.bartlomiejpluta.base.api.game.screen.Screen;
+
+public class VBox extends Container {
+
+   @Override
+   public float getWidth() {
+      var theWidestChild = 0.0f;
+
+      for (var child : children) {
+         var width = child.getMarginLeft() + child.getWidth() + child.getMarginRight();
+         if (width > theWidestChild) {
+            theWidestChild = width;
+         }
+      }
+
+      return paddingLeft + theWidestChild + paddingRight;
+   }
+
+   @Override
+   public float getHeight() {
+      var childrenHeight = 0.0f;
+
+      for (var child : children) {
+         childrenHeight += child.getMarginTop() + child.getHeight() + child.getMarginBottom();
+      }
+
+      return paddingTop + childrenHeight + paddingBottom;
+   }
+
+   @Override
+   public void draw(Screen screen, GUI gui) {
+      var currentX = absX + paddingLeft;
+      var currentY = absY + paddingTop;
+
+      for (var child : children) {
+         var childAbsX = currentX + child.getMarginLeft();
+         var childAbsY = currentY + child.getMarginTop();
+         child.setAbsoluteX(childAbsX);
+         child.setAbsoluteY(childAbsY);
+
+         currentY += child.getMarginTop() + child.getHeight() + child.getMarginBottom();
+
+         child.draw(screen, gui);
+      }
+   }
+}

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/Widget.java

@@ -5,5 +5,69 @@ import com.bartlomiejpluta.base.api.game.screen.Screen;
 public interface Widget {
    Widget getParent();
 
+   float getAbsoluteX();
+
+   float getAbsoluteY();
+
+   void setAbsoluteX(float x);
+
+   void setAbsoluteY(float y);
+
+   float getWidth();
+
+   float getHeight();
+
+   void setWidth(float width);
+
+   void setHeight(float height);
+
+   void setMargin(float top, float right, float bottom, float left);
+
+   void setMargin(float top, float rightLeft, float bottom);
+
+   void setMargin(float topBottom, float rightLeft);
+
+   void setMargin(float all);
+
+   void setMarginTop(float margin);
+
+   void setMarginRight(float margin);
+
+   void setMarginBottom(float margin);
+
+   void setMarginLeft(float margin);
+
+   float getMarginTop();
+
+   float getMarginRight();
+
+   float getMarginBottom();
+
+   float getMarginLeft();
+
+   void setPadding(float top, float right, float bottom, float left);
+
+   void setPadding(float top, float rightLeft, float bottom);
+
+   void setPadding(float topBottom, float rightLeft);
+
+   void setPadding(float all);
+
+   void setPaddingTop(float padding);
+
+   void setPaddingRight(float padding);
+
+   void setPaddingBottom(float padding);
+
+   void setPaddingLeft(float padding);
+
+   float getPaddingTop();
+
+   float getPaddingRight();
+
+   float getPaddingBottom();
+
+   float getPaddingLeft();
+
    void draw(Screen screen, GUI gui);
 }

engine/src/main/java/com/bartlomiejpluta/base/engine/gui/render/NanoVGGUI.java

@@ -45,6 +45,11 @@ public class NanoVGGUI implements GUI {
       nvgEndFrame(context);
    }
 
+   @Override
+   public void beginPath() {
+      nvgBeginPath(context);
+   }
+
    @Override
    public void drawRectangle(float x, float y, float w, float h) {
       nvgRect(context, x, y, w, h);