From fcf74094f023408c683ac94fb4d99fc4e8a1fdb2 Mon Sep 17 00:00:00 2001
From: somehussar <148253652+somehussar@users.noreply.github.com>
Date: Tue, 21 May 2024 03:28:25 +0200
Subject: [PATCH] Add scrollbars

---
 .../gui/util/GuiScrollableComponent.java      | 39 ++++++++++++++++---
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/src/main/java/noppes/npcs/client/gui/util/GuiScrollableComponent.java b/src/main/java/noppes/npcs/client/gui/util/GuiScrollableComponent.java
index 38cc087e0..48ce510cf 100644
--- a/src/main/java/noppes/npcs/client/gui/util/GuiScrollableComponent.java
+++ b/src/main/java/noppes/npcs/client/gui/util/GuiScrollableComponent.java
@@ -3,6 +3,7 @@ package noppes.npcs.client.gui.util;
 import net.minecraft.client.gui.GuiButton;
 import net.minecraft.client.gui.ScaledResolution;
 import net.minecraft.util.ChatComponentText;
+import net.minecraft.util.ResourceLocation;
 import noppes.npcs.entity.EntityNPCInterface;
 import noppes.npcs.scripted.CustomNPCsException;
 import org.lwjgl.input.Mouse;
@@ -10,6 +11,7 @@ import org.lwjgl.opengl.GL11;
 
 public class GuiScrollableComponent extends GuiNPCInterface{
 
+    public static final ResourceLocation resource = new ResourceLocation("customnpcs","textures/gui/misc.png");
     protected ScaledResolution scaledResolution;
     public int clipWidth;
     public int clipHeight;
@@ -66,12 +68,16 @@ public class GuiScrollableComponent extends GuiNPCInterface{
 
         //Enable clipping
         GL11.glEnable(GL11.GL_SCISSOR_TEST);
-        setClip();
+        setClip(xPos, yPos, clipWidth, clipHeight);
 
         this.drawDefaultBackground = false;
         if(drawBackground)
             this.drawDefaultBackground();
 
+
+        if(maxScrollY > clipHeight/2)
+            setClip(xPos, yPos, clipWidth-13, clipHeight);
+
         GL11.glTranslatef(xPos, yPos+scrollY, 0);
         super.drawScreen(mouseX-xPos, (int) (mouseY-scrollY-yPos), partialTicks);
 
@@ -79,7 +85,13 @@ public class GuiScrollableComponent extends GuiNPCInterface{
 
         //Disable clipping (VERY IMPORTANT)
         GL11.glDisable(GL11.GL_SCISSOR_TEST);
-        GL11.glTranslatef(0, 0, 0);
+        GL11.glTranslatef(-xPos, -yPos-scrollY, 0);
+
+
+
+        if(maxScrollY > clipHeight/2){
+            drawScrollBar();
+        }
 
         GL11.glPopMatrix();
     }
@@ -90,6 +102,22 @@ public class GuiScrollableComponent extends GuiNPCInterface{
         this.drawScreen(mouseX, mouseY, partialTicks);
     }
 
+    private void drawScrollBar()
+    {
+        mc.renderEngine.bindTexture(resource);
+        GL11.glColor4f(1, 1, 1, 1);
+
+        int maxSize = (int) ((clipHeight) * ( (double) (clipHeight)/ maxScrollY))/2;
+
+        int x = xPos + clipWidth - 9;
+        int y = (int) (yPos + 4 + (scrollY/maxScrollY * (clipHeight-maxSize-8)));
+
+        for(int k = y; k < y+maxSize && k-clipHeight+maxSize < clipHeight;k++){
+            drawTexturedModalRect(x, k, 176, 9, 5, 1);
+        }
+
+    }
+
     public void adjustScroll(int mouseScroll) {
         nextScrollY -= (float) mouseScroll/25;
         if(nextScrollY < 0)
@@ -125,15 +153,14 @@ public class GuiScrollableComponent extends GuiNPCInterface{
         return mouseX >= xPos && mouseX <= clipWidth+xPos && mouseY >= yPos && mouseY <= clipHeight+yPos;
     }
 
-    protected void setClip(){
-        setClip(xPos, yPos, clipWidth, clipHeight);
-    }
-
     protected void setClip(int x, int y, int width, int height){
         if(scaledResolution == null)
             return;
         int scaleFactor = scaledResolution.getScaleFactor();
 
+//        if(drawingScrollbar)
+//            width-=10;
+
         //Correct the positions for Screen Space in OpenGL
         x*=scaleFactor;
         y*=scaleFactor;