Begin work on Scrollbar functionality

Author: lowercasebtw

src/main/java/btw/lowercase/optiboxes/screen/DebugScreen.java

@@ -3,6 +3,7 @@
 import btw.lowercase.optiboxes.screen.widget.Gidget;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.input.KeyEvent;
 import net.minecraft.client.input.MouseButtonEvent;
 import net.minecraft.network.chat.Component;
 import org.jetbrains.annotations.NotNull;
@@ -53,6 +54,21 @@ public void mouseMoved(double mouseX, double mouseY) {
         super.mouseMoved(mouseX, mouseY);
     }
 
+    @Override
+    public boolean mouseScrolled(double mouseX, double mouseY, double scrollX, double scrollY) {
+        return super.mouseScrolled(mouseX, mouseY, scrollX, scrollY);
+    }
+
+    @Override
+    public boolean keyPressed(@NotNull KeyEvent event) {
+        return super.keyPressed(event);
+    }
+
+    @Override
+    public boolean keyReleased(@NotNull KeyEvent event) {
+        return super.keyReleased(event);
+    }
+
     @Override
     public void onClose() {
         this.minecraft.setScreen(this.parent);

src/main/java/btw/lowercase/optiboxes/screen/widget/Gidget.java

@@ -31,6 +31,15 @@ public void onMouseMove(double mouseX, double mouseY) {
     public void onMouseClicked(double mouseX, double mouseY) {
     }
 
+    public void onMouseScrolled(double amount) {
+    }
+
+    public void onKeyDown(int scancode, int keycode) {
+    }
+
+    public void onKeyUp(int scancode, int keycode) {
+    }
+
     public boolean isInside(double x, double y) {
         return (x >= this.x && x <= this.x + this.width) && (y >= this.y && y <= this.y + this.height);
     }

src/main/java/btw/lowercase/optiboxes/screen/widget/ScrollableList.java

@@ -7,12 +7,12 @@
 
 public class ScrollableList extends Gidget {
     private final List<Gidget> gidgets;
-    private double scrollY;
+    private final Scrollbar scrollbar;
 
     public ScrollableList(List<Gidget> gidgets, int x, int y, int width, int height) {
         super(x, y, width, height);
         this.gidgets = gidgets;
-        this.scrollY = 0.0F;
+        this.scrollbar = new Scrollbar(width - Scrollbar.DEFAULT_WIDTH - 8, y, height);
         for (Gidget gidget : this.gidgets) {
             gidget.reposition(this.x() + gidget.x(), this.y() + gidget.y() + 4);
         }
@@ -21,6 +21,7 @@ public ScrollableList(List<Gidget> gidgets, int x, int y, int width, int height)
     @Override
     public void render(GuiGraphics guiGraphics, int mouseX, int mouseY) {
         this.renderBackground(guiGraphics);
+        this.scrollbar.render(guiGraphics, mouseX, mouseY);
         guiGraphics.enableScissor(this.x(), this.y(), this.x() + this.width(), this.y() + this.height());
         for (Gidget gidget : this.gidgets) {
             gidget.render(guiGraphics, mouseX, mouseY);
@@ -43,6 +44,10 @@ public void onMouseMove(double mouseX, double mouseY) {
                 gidget.onMouseMove(mouseX, mouseY);
             }
         }
+
+        if (this.scrollbar.isInside(mouseX, mouseY)) {
+            this.scrollbar.onMouseMove(mouseX, mouseY);
+        }
     }
 
     @Override
@@ -53,5 +58,64 @@ public void onMouseClicked(double mouseX, double mouseY) {
                 gidget.onMouseClicked(mouseX, mouseY);
             }
         }
+
+        if (this.scrollbar.isInside(mouseX, mouseY)) {
+            this.scrollbar.onMouseClicked(mouseX, mouseY);
+        }
+    }
+
+    private static class Scrollbar extends Gidget {
+        public static final int DEFAULT_WIDTH = 10;
+        private final Knob knob;
+        private double scrollY;
+
+        protected Scrollbar(int x, int y, int height) {
+            super(x, y, DEFAULT_WIDTH, height);
+            this.knob = new Knob(x, y, Knob.DEFAULT_HEIGHT);
+            this.scrollY = 0.0;
+        }
+
+        @Override
+        public void render(GuiGraphics guiGraphics, int mouseX, int mouseY) {
+            this.renderBackground(guiGraphics);
+            this.knob.render(guiGraphics, mouseX, mouseY);
+        }
+
+        @Override
+        public void renderBackground(GuiGraphics guiGraphics) {
+            guiGraphics.fill(this.x(), this.y(), this.x() + this.width(), this.y() + this.height(), ARGB.color(0.5F, 0x00FF95));
+        }
+
+        @Override
+        public void onMouseClicked(double mouseX, double mouseY) {
+            super.onMouseClicked(mouseX, mouseY);
+        }
+
+        @Override
+        public void onMouseMove(double mouseX, double mouseY) {
+            super.onMouseMove(mouseX, mouseY);
+        }
+
+        public double getScrollY() {
+            return this.scrollY;
+        }
+
+        private class Knob extends Gidget {
+            public static final int DEFAULT_HEIGHT = 30;
+
+            public Knob(int x, int y, int height) {
+                super(x, y, Scrollbar.this.width(), height);
+            }
+
+            @Override
+            public void render(GuiGraphics guiGraphics, int mouseX, int mouseY) {
+                this.renderBackground(guiGraphics);
+            }
+
+            @Override
+            public void renderBackground(GuiGraphics guiGraphics) {
+                guiGraphics.fill(this.x(), this.y(), this.x() + this.width(), this.y() + this.height(), ARGB.color(1.0F, 0xAAFE00));
+            }
+        }
     }
 }