Custom Scroll Menu

cmchenry · June 12, 2015

I have the scroll part working, I can scroll the text up and down, the only issue is it does not show all of the objects in the ArrayList<String>. Any ideas on how to get it to show all of the objects? I scroll down and then it just stops about half-way, I believe the rest of the text are getting drawn way down the screen that the player cannot see.

	@Override
public void drawScreen(int x, int y, float f)
{
	drawDefaultBackground();

	GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
	this.mc.renderEngine.bindTexture(new ResourceLocation(Constants.MOD_ID, "textures/gui/GuiFriends.png"));

	int posX = (this.width - xSizeOfTexture) / 2;
	int posY = (this.height - ySizeOfTexture) / 2;

	drawTexturedModalRect(posX, posY, 0, 0, xSizeOfTexture, ySizeOfTexture);

	drawTexturedModalRect(posX + 235, posY + 10 + this.scrollButtonY, 231, 168, 12, 16);

	int size = 30;
	int top = posY + 20;
	int devideFactor = 3;
	int bottom = posY + 150;
	int contentHeight = list.size() * size;
	for(int i = 0; i < list.size(); i++)
	{
		System.out.println(- (this.scrollButtonY - -((size * i))));
		this.drawCenteredString(this.fontRendererObj, list.get(i), posX + 150, (top + (size * i) - (this.scrollButtonY + 500)), 0xFFFFFF);
	}
	super.drawScreen(x, y, f);
}

psgarsenal · June 13, 2015

for(int i = 0; i < list.size(); i++)

Instead of using "<" use "<=" ?

This way it should read the whole array

Elix_x · June 13, 2015

for(int i = 0; i < list.size(); i++)

Instead of using "<" use "<=" ?

This way it should read the whole array

Nope, beacause it may/will throw IndexOutOfBounds: when there's 1 element it's put on place 0, and size returns 1. When 2, they are placed on 0, 1 and size returns 2. You got the idea...

@cmchenry

Also why can't you use for(String string : list)?

cmchenry · June 16, 2015

Thank you guys for the replies, but those will not fix the issue as I have already tried them sorry guys

Abastro · June 16, 2015

Why do you implement your own Scrolls? You can just use GuiScrollingList or GuiListExtended.

cmchenry · June 16, 2015

I'm not a fan of the way they look, not to mention they don't resize very well at all when the window is resized; and there is that pesky background. Which I have gotten rid of all of them, but I still like using my own scroll button and methods of code. Can't believe this is that hard... lol

Abastro · June 16, 2015

I'm not a fan of the way they look, not to mention they don't resize very well at all when the window is resized; and there is that pesky background. Which I have gotten rid of all of them, but I still like using my own scroll button and methods of code. Can't believe this is that hard... lol

Yes, it is really hard..

So post the full code including the scrolling code.

cmchenry · June 16, 2015

package us.minelife.core.client.gui;

import java.util.ArrayList;

import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.gui.GuiScreen;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.ResourceLocation;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.client.GuiScrollingList;
import us.minelife.core.Constants;
import us.minelife.core.client.gui.custom.CustomGuiTextField;
import us.minelife.core.client.gui.custom.CustomScrollingList;

public class GuiFriends extends GuiScreen {

private EntityPlayer player;
private int xSizeOfTexture = 256, ySizeOfTexture = 168;
private CustomGuiTextField transferName, transferAmount;
private int scrollButtonY;
private ArrayList<String> list;

public GuiFriends(EntityPlayer player) {
	this.player = player;
	this.scrollButtonY = 0;
	list = new ArrayList<String>();
	for (int i = 0; i < 101; i++) {
		list.add("ADADADAD" + i);
	}
}

@Override
public void initGui() {
	this.buttonList.clear();

	int posX = (this.width - xSizeOfTexture) / 2;
	int posY = (this.height - ySizeOfTexture) / 2;

	this.buttonList.add(new GuiButton(0, posX + 7, posY + 135, 100, 20,
			"Transfer"));

	this.transferName = new CustomGuiTextField(
			Minecraft.getMinecraft().fontRenderer,
			this.width / 2 - 126 / 2, posY + 65, 126, 20);
	this.transferName.setMaxStringLength(19);
	this.transferName.setFocused(false);

	this.transferAmount = new CustomGuiTextField(
			Minecraft.getMinecraft().fontRenderer,
			this.width / 2 - 126 / 2, posY + 105, 126, 20);
	this.transferAmount.setMaxStringLength(19);
	this.transferAmount.setFocused(false);
}

@Override
public void drawScreen(int x, int y, float f) {
	drawDefaultBackground();

	GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
	this.mc.renderEngine.bindTexture(new ResourceLocation(Constants.MOD_ID,
			"textures/gui/GuiFriends.png"));

	int posX = (this.width - xSizeOfTexture) / 2;
	int posY = (this.height - ySizeOfTexture) / 2;

	drawTexturedModalRect(posX, posY, 0, 0, xSizeOfTexture, ySizeOfTexture);
	drawTexturedModalRect(posX + 235, posY + 10 + this.scrollButtonY, 231,
			168, 12, 16);
	int size = 30;
	int top = posY + 25;
	int bottom = posY + 140;
	int contentHeight = list.size() * size;
	int position = 0;
	int totalSpace = bottom - top;
	int toDisplay = (list.size() * size) / totalSpace;
	System.out.println(toDisplay);
	for (int i = 0; i < toDisplay; i++) {
		position = (top + 1 + (size * i) - (this.scrollButtonY));
		if (position > top && position < bottom) {
			this.drawCenteredString(this.fontRendererObj, list.get(i),
					posX + 150, position, 0xFFFFFF);
		}
	}
	super.drawScreen(x, y, f);
}

@Override
public void mouseClickMove(int x, int y, int z, long par4) {
	int posY = (this.height - ySizeOfTexture) / 2;
	int function = -(posY - y) - 16;
	if (function < 0) {
		this.scrollButtonY = 0;
		return;
	} else if (function > 132) {
		this.scrollButtonY = 133;
		return;
	}
	this.scrollButtonY = function;

	int size = 30;
	int top = posY + 25;
	int bottom = posY + 140;
	int contentHeight = list.size() * size;
	System.out.println("Scroll Button Y: " + this.scrollButtonY);
	System.out.println("Top: " + top);
	System.out.println("Bottom: " + bottom);
	System.out.println("Content Height: " + contentHeight);
}

@Override
protected void actionPerformed(GuiButton button) {
	int id = button.id;

	if (id == 0) {

	}

	super.actionPerformed(button);
}

@Override
public void mouseMovedOrUp(int x, int y, int z) {
	if (mousePressed(this.transferAmount, Minecraft.getMinecraft(), x, y)) {
		this.transferAmount.setFocused(true);
		this.transferName.setFocused(false);
	} else if (mousePressed(this.transferName, Minecraft.getMinecraft(), x,
			y)) {
		this.transferAmount.setFocused(false);
		this.transferName.setFocused(true);
	} else {
		this.transferName.setFocused(false);
		this.transferAmount.setFocused(false);
	}

	super.mouseMovedOrUp(x, y, z);
}

public boolean mousePressed(CustomGuiTextField field,
		Minecraft p_146116_1_, int p_146116_2_, int p_146116_3_) {
	return p_146116_2_ >= field.xPosition && p_146116_3_ >= field.yPosition
			&& p_146116_2_ < field.xPosition + field.width
			&& p_146116_3_ < field.yPosition + field.height;

	}
}

Abastro · June 16, 2015

So the position you are using is this:

position = (top + 1 + (size * i) - (this.scrollButtonY));

But it seems that the scrollButtonY field is the relative Y position of the scroll button.

I think you should scale the field, because scrolling length is proportional to the number of the elements.

+ I remember that GuiScrollingList supports custom scrolling button, maybe you can adopt that.

cmchenry · June 16, 2015

Okay I finally got it to work, the only issue now is that the button does not go where the mouse is, it just goes up and down relative to the location in the list. I need it to stick with the mouse when the player drags the mouse.

package us.minelife.core.client.gui;

import java.util.ArrayList;

import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Gui;
import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.gui.GuiScreen;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.ResourceLocation;

import org.lwjgl.input.Mouse;
import org.lwjgl.opengl.GL11;

import cpw.mods.fml.client.GuiScrollingList;
import us.minelife.core.Constants;
import us.minelife.core.client.gui.custom.CustomGuiTextField;
import us.minelife.core.client.gui.custom.CustomScrollingList;

public class GuiFriends extends GuiScreen
{

private EntityPlayer player;
private int xSizeOfTexture = 256, ySizeOfTexture = 168, scrollButtonY = 0,
		top, bottom, mouseX, mouseY, slotHeight, topScrollBar,
		bottomScrollBar;
private CustomGuiTextField transferName, transferAmount;
private float scrollDistance, initialMouseClickY = -2.0F, scrollFactor;
private ArrayList<String> list;
private int lastMouseY;

public GuiFriends(EntityPlayer player)
{
	this.player = player;
	this.scrollDistance = 0;
	this.initialMouseClickY = 0;
	list = new ArrayList<String>();
	lastMouseY = 0;
	for (int i = 0; i < 41; i++)
	{
		list.add("Friend " + i);
	}
	this.slotHeight = 30;
}

@Override
public void initGui()
{
	this.buttonList.clear();

	int posX = (this.width - xSizeOfTexture) / 2;
	int posY = (this.height - ySizeOfTexture) / 2;

	this.buttonList.add(new GuiButton(0, posX + 7, posY + 135, 100, 20,
			"Transfer"));

	this.transferName = new CustomGuiTextField(
			Minecraft.getMinecraft().fontRenderer,
			this.width / 2 - 126 / 2, posY + 65, 126, 20);
	this.transferName.setMaxStringLength(19);
	this.transferName.setFocused(false);

	this.transferAmount = new CustomGuiTextField(
			Minecraft.getMinecraft().fontRenderer,
			this.width / 2 - 126 / 2, posY + 105, 126, 20);
	this.transferAmount.setMaxStringLength(19);
	this.transferAmount.setFocused(false);
}

private int getContentHeight()
{
	return list.size() * this.slotHeight;
}

private int getSize()
{
	return list.size();
}

@Override
public void drawScreen(int x, int y, float f)
{
	drawDefaultBackground();

	GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
	this.mc.renderEngine.bindTexture(new ResourceLocation(Constants.MOD_ID,
			"textures/gui/GuiFriends.png"));

	int posX = (this.width - xSizeOfTexture) / 2;
	int posY = (this.height - ySizeOfTexture) / 2;

	drawTexturedModalRect(posX, posY, 0, 0, xSizeOfTexture, ySizeOfTexture);
	this.mouseX = x;
	this.mouseY = y;
	int bottomOffset = 140;
	int topOffset = 35;
	this.top = posY + 45;
	this.bottom = posY + 140;
	this.topScrollBar = posY + 10;
	this.bottomScrollBar = posY + 170;
	int listLength = this.getSize();
	int scrollBarXStart = posX + 235;
	int scrollBarXEnd = scrollBarXStart + 12;
	int boxLeft = posX + 50;
	int boxRight = scrollBarXStart - 1;
	int var10;
	int var11;
	int var13;
	int var19;

	if (Mouse.isButtonDown(0))
	{
		if (this.initialMouseClickY == -1.0F)
		{
			boolean var7 = true;
			if (mouseX >= scrollBarXStart && mouseX <= scrollBarXEnd)
			{
				int function = -(posY - y) - 16;
				if (function < 0) {
					this.scrollButtonY = 0;
					return;
				} else if (function > 132) {
					this.scrollButtonY = 133;
					return;
				}
				this.scrollButtonY = function;
				int dir = Mouse.getDY();
				System.out.println("HEYO!");
				if (dir > 0)
				{
					this.scrollDistance -= (float) (this.slotHeight * 2 / 3);
					this.initialMouseClickY = -2.0F;
					this.applyScrollLimits();
				} else if (dir < 0)
				{
					this.scrollDistance += (float) (this.slotHeight * 2 / 3);
					this.initialMouseClickY = -2.0F;
					this.applyScrollLimits();
				}
			}
			if (mouseY >= this.topScrollBar
					&& mouseY <= this.bottomScrollBar)
			{
				var10 = mouseY - this.top - 0 + (int) this.scrollDistance
						- 4;
				var11 = var10 / this.slotHeight;

				if (mouseX >= boxLeft && mouseX <= boxRight && var11 >= 0
						&& var10 >= 0 && var11 < listLength)
				{
				} else if (mouseX >= boxLeft && mouseX <= boxRight
						&& var10 < 0)
				{
					var7 = false;
				}

				if (mouseX >= scrollBarXStart && mouseX <= scrollBarXEnd)
				{
					this.scrollFactor = -1.0F;
					var19 = this.getContentHeight()
							- (this.bottom - this.top - 4);

					if (var19 < 1)
					{
						var19 = 1;
					}

					var13 = (int) ((float) ((this.bottom - this.top) * (this.bottom - this.top)) / (float) this
							.getContentHeight());

					if (var13 < 32)
					{
						var13 = 32;
					}

					if (var13 > this.bottom - this.top - 
					{
						var13 = this.bottom - this.top - 8;
					}

					this.scrollFactor /= (float) (this.bottom - this.top - var13)
							/ (float) var19;
				} else
				{
					this.scrollFactor = 1.0F;
				}

				if (var7)
				{
					this.initialMouseClickY = (float) mouseY;
				} else
				{
					this.initialMouseClickY = -2.0F;
				}
			} else
			{
				this.initialMouseClickY = -2.0F;
			}
		} else if (this.initialMouseClickY >= 0.0F)
		{
			this.scrollDistance -= ((float) mouseY - this.initialMouseClickY)
					* this.scrollFactor;
			this.initialMouseClickY = (float) mouseY;
		}
	} else
	{
		while (Mouse.next())
		{
			int var16 = Mouse.getEventDWheel();

			if (var16 != 0)
			{
				if (var16 > 0)
				{
					var16 = -1;
				} else if (var16 < 0)
				{
					var16 = 1;
				}

				this.scrollDistance += (float) (var16 * this.slotHeight / 2);
			}
		}

		this.initialMouseClickY = -1.0F;
	}
	this.applyScrollLimits();
	var10 = this.top + 4 - (int) this.scrollDistance;

	int var14;

	for (var11 = 0; var11 < listLength; ++var11)
	{
		var19 = var10 + var11 * this.slotHeight + 0;
		var13 = this.slotHeight - 4;

		if (var19 <= this.bottom && var19 + var13 >= this.top)
		{
			this.drawCenteredString(this.fontRendererObj, list.get(var11),
					posX + 145, var19, 0xFFFFFF);
		}
	}

	var19 = this.getContentHeight()
			- (this.bottomScrollBar - this.topScrollBar - 4);

	if (var19 > 0)
	{
		var13 = (this.bottomScrollBar - this.topScrollBar)
				* (this.bottomScrollBar - this.topScrollBar)
				/ this.getContentHeight();

		if (var13 < 32)
		{
			var13 = 32;
		}

		if (var13 > this.bottomScrollBar - this.topScrollBar - 
		{
			var13 = this.bottomScrollBar - this.topScrollBar - 8;
		}

		var14 = (int) this.scrollDistance
				* (this.bottomScrollBar - this.topScrollBar - var13)
				/ var19 + this.topScrollBar;

		if (var14 < this.topScrollBar)
		{
			var14 = this.topScrollBar;
		}
		this.mc.renderEngine.bindTexture(new ResourceLocation(
				Constants.MOD_ID, "textures/gui/GuiFriends.png"));
		this.drawTexturedModalRect(scrollBarXStart, var14,
				xSizeOfTexture - 25, ySizeOfTexture, 12, 16);
	}

	GL11.glEnable(GL11.GL_TEXTURE_2D);
	GL11.glShadeModel(GL11.GL_FLAT);
	GL11.glEnable(GL11.GL_ALPHA_TEST);
	GL11.glDisable(GL11.GL_BLEND);
	super.drawScreen(x, y, f);
}

private void applyScrollLimits()
{
	int posX = (this.width - xSizeOfTexture) / 2;
	int posY = (this.height - ySizeOfTexture) / 2;
	int top = posY + 25;
	int bottom = posY + 140;
	int var1 = getSize() * this.slotHeight - (bottom - top - 4);

	if (var1 < 0)
	{
		var1 /= 2;
	}

	if (this.scrollDistance < 0.0F)
	{
		this.scrollDistance = 0.0F;
	}

	if (this.scrollDistance > (float) var1)
	{
		this.scrollDistance = (float) var1;
	}
}

@Override
public void mouseMovedOrUp(int x, int y, int z)
{
	if (mousePressed(this.transferAmount, Minecraft.getMinecraft(), x, y))
	{
		this.transferAmount.setFocused(true);
		this.transferName.setFocused(false);
	} else if (mousePressed(this.transferName, Minecraft.getMinecraft(), x,
			y))
	{
		this.transferAmount.setFocused(false);
		this.transferName.setFocused(true);
	} else
	{
		this.transferName.setFocused(false);
		this.transferAmount.setFocused(false);
	}

	super.mouseMovedOrUp(x, y, z);
}

public boolean mousePressed(CustomGuiTextField field,
		Minecraft p_146116_1_, int p_146116_2_, int p_146116_3_)
{
	return p_146116_2_ >= field.xPosition && p_146116_3_ >= field.yPosition
			&& p_146116_2_ < field.xPosition + field.width
			&& p_146116_3_ < field.yPosition + field.height;
}
}

cmchenry · June 16, 2015

I finally got it working! I am going to make a class that can be extended for future use; will post here so others can use it.

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