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gmod622

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Hey all!

 

So I trying to draw a energy Storage bar, and have it insync with the int, I used furnace GUI for example, but my problem is that it draws, but does not change at all based on energy / manual changes.

 

here is the specific part that I need help on

Gui Variables:

final int ENERGY_XPOS = -12;
final int ENERGY_YPOS = 28;
final int ENERGY_ICON_U = 176;   // texture position of energy bar
final int ENERGY_ICON_V = 21;
final int ENERGY_WIDTH = 22;
final int ENERGY_HEIGHT = 80;
final int ENERGY_X_SPACING = 18;

 

Tile Variables:

public int energyDP;
public int energyMax = 5000;
public int energyPerT = 2;
public boolean canAcceptEnergy = true;

 

Code:

double energyRemain = tileEntity.energyDP;
		int energyMax = tileEntity.energyMax;
		int yOffsetEnergy = (int)((energyRemain - energyMax) * ENERGY_HEIGHT); //where im stuck, energy remain should be what, and what should it be modified by
		drawTexturedModalRect(guiLeft + ENERGY_XPOS + ENERGY_X_SPACING, guiTop + ENERGY_YPOS + yOffset,
													ENERGY_ICON_U, ENERGY_ICON_V + yOffset, ENERGY_WIDTH, ENERGY_HEIGHT - yOffset);

Not new to java >> New to modding.

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Hey all!

 

So I trying to draw a energy Storage bar, and have it insync with the int, I used furnace GUI for example, but my problem is that it draws, but does not change at all based on energy / manual changes.

 

here is the specific part that I need help on

Gui Variables:

final int ENERGY_XPOS = -12;
final int ENERGY_YPOS = 28;
final int ENERGY_ICON_U = 176;   // texture position of energy bar
final int ENERGY_ICON_V = 21;
final int ENERGY_WIDTH = 22;
final int ENERGY_HEIGHT = 80;
final int ENERGY_X_SPACING = 18;

 

Tile Variables:

public int energyDP;
public int energyMax = 5000;
public int energyPerT = 2;
public boolean canAcceptEnergy = true;

 

Code:

double energyRemain = tileEntity.energyDP;
		int energyMax = tileEntity.energyMax;
		int yOffsetEnergy = (int)((energyRemain - energyMax) * ENERGY_HEIGHT); //where im stuck, energy remain should be what, and what should it be modified by
		drawTexturedModalRect(guiLeft + ENERGY_XPOS + ENERGY_X_SPACING, guiTop + ENERGY_YPOS + yOffset,
													ENERGY_ICON_U, ENERGY_ICON_V + yOffset, ENERGY_WIDTH, ENERGY_HEIGHT - yOffset);

When do you update energyDP?

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

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this:

	for (EnumFacing face : EnumFacing.values()) {
	    BlockPos adj = getPos().offset(face);
	    	if(worldObj.getBlockState(adj).getBlock() == ModBlocks.solarGenerator) {
	    		energyDP++;
	    	}else if(worldObj.getBlockState(adj).getBlock() == null) {
	    		return;
	    	}
		}

 

entire TE for future reference:

 

package com.lambda.PlentifulMisc.blocks.tile;

import net.minecraft.tileentity.TileEntity;

import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.item.crafting.FurnaceRecipes;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagInt;
import net.minecraft.nbt.NBTTagIntArray;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.network.NetworkManager;
import net.minecraft.network.play.server.SPacketUpdateTileEntity;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.tileentity.TileEntityFurnace;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.ITickable;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.util.text.ITextComponent;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.util.text.TextComponentTranslation;
import net.minecraft.world.EnumSkyBlock;
import net.minecraft.world.World;

import javax.annotation.Nullable;

import com.lambda.PlentifulMisc.init.ModBlocks;
import com.lambda.PlentifulMisc.recipe.CraftingHandlerCrystallizer;

import java.util.Arrays;

/**
* User: brandon3055
* Date: 06/01/2015
*
* TileInventorySmelting is an advanced sided inventory that works like a vanilla furnace except that it has 5 input and output slots,
* 4 fuel slots and cooks at up to four times the speed.
* The input slots are used sequentially rather than in parallel, i.e. the first slot cooks, then the second, then the third, etc
* The fuel slots are used in parallel.  The more slots burning in parallel, the faster the cook time.
* The code is heavily based on TileEntityFurnace.
*/
public class TileEnityCrystallizer extends TileEntity implements IInventory, ITickable {
/** Create and initialize the itemStacks variable that will store store the itemStacks */
public static final int FUEL_SLOTS_COUNT = 1;
public static final int INPUT_SLOTS_COUNT = 1;
public static final int OUTPUT_SLOTS_COUNT = 5;
public static final int TOTAL_SLOTS_COUNT = FUEL_SLOTS_COUNT + INPUT_SLOTS_COUNT + OUTPUT_SLOTS_COUNT;

public static final int FIRST_FUEL_SLOT = 0;
public static final int FIRST_INPUT_SLOT = FIRST_FUEL_SLOT + FUEL_SLOTS_COUNT;
public static final int FIRST_OUTPUT_SLOT = FIRST_INPUT_SLOT + INPUT_SLOTS_COUNT;

private ItemStack[] itemStacks = new ItemStack[TOTAL_SLOTS_COUNT];

/** The number of burn ticks remaining on the current piece of fuel */
public int energyDP;
public int energyMax = 5000;
public int energyPerT = 2;
public int energyReceivedT = 1;
public boolean canAcceptEnergy = true;
/** The initial fuel value of the currently burning fuel (in ticks of burn duration) */
private int [] energyInitial = new int[FUEL_SLOTS_COUNT];

/**The number of ticks the current item has been cooking*/
private short cookTime;
/**The number of ticks required to cook an item*/
private static final short COOK_TIME_FOR_COMPLETION = 100;  // vanilla value is 200 = 10 seconds

private int cachedNumberOfBurningSlots = -1;

/**
 * Returns the amount of fuel remaining on the currently burning item in the given fuel slot.
 * @fuelSlot the number of the fuel slot (0..3)
 * @return fraction remaining, between 0 - 1
 */
public double fractionOfFuelRemaining(int fuelSlot)
{
	if (energyInitial[fuelSlot] <= 0 ) return 0;
	double fraction = energyDP / (double)energyDP;
	return MathHelper.clamp_double(fraction, 0.0, 1.0);
}

/**
 * return the remaining burn time of the fuel in the given slot
 * @param fuelSlot the number of the fuel slot (0..3)
 * @return seconds remaining
 */
public int secondsOfFuelRemaining(int fuelSlot)
{
	if (energyDP <= 0 ) return 0;
	return energyDP / 20; // 20 ticks per second
}

/**
 * Get the number of slots which have fuel burning in them.
 * @return number of slots with burning fuel, 0 - FUEL_SLOTS_COUNT
 */

/**
 * Returns the amount of cook time completed on the currently cooking item.
 * @return fraction remaining, between 0 - 1
 */
public double fractionOfCookTimeComplete()
{
	double fraction = cookTime / (double)COOK_TIME_FOR_COMPLETION;
	return MathHelper.clamp_double(fraction, 0.0, 1.0);
}

// This method is called every tick to update the tile entity, i.e.
// - see if the fuel has run out, and if so turn the furnace "off" and slowly uncook the current item (if any)
// - see if any of the items have finished smelting
// It runs both on the server and the client.
@Override
public void update() {
	// If there is nothing to smelt or there is no room in the output, reset cookTime and return
	if (canSmelt()) {
		int energyStored = burnFuel();

		// If fuel is available, keep cooking the item, otherwise start "uncooking" it at double speed
		if (energyStored > 0) {
			cookTime += energyStored;
		}	else {
			cookTime -= 1;
		}
		if (cookTime < 0) cookTime = 0;

		// If cookTime has reached maxCookTime smelt the item and reset cookTime
		if (cookTime >= COOK_TIME_FOR_COMPLETION) {
			smeltItem();
			cookTime = 0;
		}
	}	else {
		cookTime = 0;
	}


	if(energyDP >= energyMax) {
		energyDP = energyMax;
		canAcceptEnergy = false;
	}else {
		canAcceptEnergy = true;
	}

	// when the number of burning slots changes, we need to force the block to re-render, otherwise the change in
	//   state will not be visible.  Likewise, we need to force a lighting recalculation.
	// The block update (for renderer) is only required on client side, but the lighting is required on both, since
	//    the client needs it for rendering and the server needs it for crop growth etc

	for (EnumFacing face : EnumFacing.values()) {
	    BlockPos adj = getPos().offset(face);
	    	if(worldObj.getBlockState(adj).getBlock() == ModBlocks.solarGenerator) {
	    		energyDP++;
	    	}else if(worldObj.getBlockState(adj).getBlock() == null) {
	    		return;
	    	}
		}

	if (worldObj.isRemote) {
        IBlockState iblockstate = this.worldObj.getBlockState(pos);
        final int FLAGS = 3;  // I'm not sure what these flags do, exactly.
        worldObj.notifyBlockUpdate(pos, iblockstate, iblockstate, FLAGS);
		}
		worldObj.checkLightFor(EnumSkyBlock.BLOCK, pos);
	}

/**
 * 	for each fuel slot: decreases the burn time, checks if burnTimeRemaining = 0 and tries to consume a new piece of fuel if one is available
 * @return the number of fuel slots which are burning
 */

private int burnFuel() {
	int burningCount = 0;
		int fuelSlotNumber = FIRST_FUEL_SLOT;
		if (energyDP > 0) {
			energyDP -= energyPerT;
			++burningCount;
		if (energyDP == 0) {
				energyDP = energyInitial[0] = getItemBurnTime(itemStacks[fuelSlotNumber]);
				++burningCount;
			}
		}
	markDirty();
	return burningCount;
}
/**
 * Check if any of the input items are smeltable and there is sufficient space in the output slots
 * @return true if smelting is possible
 */
private boolean canSmelt() {return smeltItem(false);}

/**
 * Smelt an input item into an output slot, if possible
 */
private void smeltItem() {smeltItem(true);}

/**
 * checks that there is an item to be smelted in one of the input slots and that there is room for the result in the output slots
 * If desired, performs the smelt
 * @param performSmelt if true, perform the smelt.  if false, check whether smelting is possible, but don't change the inventory
 * @return false if no items can be smelted, true otherwise
 */
private boolean smeltItem(boolean performSmelt)
{
	Integer firstSuitableInputSlot = null;
	Integer firstSuitableOutputSlot = null;
	ItemStack result = null;

	// finds the first input slot which is smeltable and whose result fits into an output slot (stacking if possible)
	for (int inputSlot = FIRST_INPUT_SLOT; inputSlot < FIRST_INPUT_SLOT + INPUT_SLOTS_COUNT; inputSlot++)	{
		if (itemStacks[inputSlot] != null) {
			result = getSmeltingResultForItem(itemStacks[inputSlot]);
  			if (result != null) {
				// find the first suitable output slot- either empty, or with identical item that has enough space
				for (int outputSlot = FIRST_OUTPUT_SLOT; outputSlot < FIRST_OUTPUT_SLOT + OUTPUT_SLOTS_COUNT; outputSlot++) {
					ItemStack outputStack = itemStacks[outputSlot];
					if (outputStack == null) {
						firstSuitableInputSlot = inputSlot;
						firstSuitableOutputSlot = outputSlot;
						break;
					}

					if (outputStack.getItem() == result.getItem() && (!outputStack.getHasSubtypes() || outputStack.getMetadata() == outputStack.getMetadata())
									&& ItemStack.areItemStackTagsEqual(outputStack, result)) {
						int combinedSize = itemStacks[outputSlot].stackSize + result.stackSize;
						if (combinedSize <= getInventoryStackLimit() && combinedSize <= itemStacks[outputSlot].getMaxStackSize()) {
							firstSuitableInputSlot = inputSlot;
							firstSuitableOutputSlot = outputSlot;
							break;
						}
					}
				}
				if (firstSuitableInputSlot != null) break;
			}
		}
	}

	if (firstSuitableInputSlot == null) return false;
	if (!performSmelt) return true;

	// alter input and output
	itemStacks[firstSuitableInputSlot].stackSize--;
	if (itemStacks[firstSuitableInputSlot].stackSize <=0) itemStacks[firstSuitableInputSlot] = null;
	if (itemStacks[firstSuitableOutputSlot] == null) {
		itemStacks[firstSuitableOutputSlot] = result.copy(); // Use deep .copy() to avoid altering the recipe
	} else {
		itemStacks[firstSuitableOutputSlot].stackSize += result.stackSize;
	}
	markDirty();
	return true;
}

// returns the smelting result for the given stack. Returns null if the given stack can not be smelted
public static ItemStack getSmeltingResultForItem(ItemStack stack) { return CraftingHandlerCrystallizer.instance().getSmeltingResult(stack); }

// returns the number of ticks the given item will burn. Returns 0 if the given item is not a valid fuel
	public static short getItemBurnTime(ItemStack stack)
	{
		int burntime = TileEntityFurnace.getItemBurnTime(stack);  // just use the vanilla values
		return (short)MathHelper.clamp_int(burntime, 0, Short.MAX_VALUE);
	}

	// Gets the number of slots in the inventory
	@Override
	public int getSizeInventory() {
		return itemStacks.length;
	}

	// Gets the stack in the given slot
	@Override
	public ItemStack getStackInSlot(int i) {
		return itemStacks[i];
	}

	/**
	 * Removes some of the units from itemstack in the given slot, and returns as a separate itemstack
	 * @param slotIndex the slot number to remove the items from
	 * @param count the number of units to remove
	 * @return a new itemstack containing the units removed from the slot
	 */
	@Override
	public ItemStack decrStackSize(int slotIndex, int count) {
		ItemStack itemStackInSlot = getStackInSlot(slotIndex);
		if (itemStackInSlot == null) return null;

		ItemStack itemStackRemoved;
		if (itemStackInSlot.stackSize <= count) {
			itemStackRemoved = itemStackInSlot;
			setInventorySlotContents(slotIndex, null);
		} else {
			itemStackRemoved = itemStackInSlot.splitStack(count);
			if (itemStackInSlot.stackSize == 0) {
				setInventorySlotContents(slotIndex, null);
			}
		}
		markDirty();
		return itemStackRemoved;
	}

	// overwrites the stack in the given slotIndex with the given stack
	@Override
	public void setInventorySlotContents(int slotIndex, ItemStack itemstack) {
		itemStacks[slotIndex] = itemstack;
		if (itemstack != null && itemstack.stackSize > getInventoryStackLimit()) {
			itemstack.stackSize = getInventoryStackLimit();
		}
		markDirty();
	}

	// This is the maximum number if items allowed in each slot
	// This only affects things such as hoppers trying to insert items you need to use the container to enforce this for players
	// inserting items via the gui
	@Override
	public int getInventoryStackLimit() {
		return 64;
	}

	// Return true if the given player is able to use this block. In this case it checks that
	// 1) the world tileentity hasn't been replaced in the meantime, and
	// 2) the player isn't too far away from the centre of the block
	@Override
	public boolean isUseableByPlayer(EntityPlayer player) {
		if (this.worldObj.getTileEntity(this.pos) != this) return false;
		final double X_CENTRE_OFFSET = 0.5;
		final double Y_CENTRE_OFFSET = 0.5;
		final double Z_CENTRE_OFFSET = 0.5;
		final double MAXIMUM_DISTANCE_SQ = 8.0 * 8.0;
		return player.getDistanceSq(pos.getX() + X_CENTRE_OFFSET, pos.getY() + Y_CENTRE_OFFSET, pos.getZ() + Z_CENTRE_OFFSET) < MAXIMUM_DISTANCE_SQ;
	}

	// Return true if the given stack is allowed to be inserted in the given slot
	// Unlike the vanilla furnace, we allow anything to be placed in the fuel slots
	static public boolean isItemValidForFuelSlot(ItemStack itemStack)
	{
		return true;
	}

	// Return true if the given stack is allowed to be inserted in the given slot
	// Unlike the vanilla furnace, we allow anything to be placed in the fuel slots
	static public boolean isItemValidForInputSlot(ItemStack itemStack)
	{
		return true;
	}

	// Return true if the given stack is allowed to be inserted in the given slot
	// Unlike the vanilla furnace, we allow anything to be placed in the fuel slots
	static public boolean isItemValidForOutputSlot(ItemStack itemStack)
	{
		return false;
	}

	//------------------------------

	// This is where you save any data that you don't want to lose when the tile entity unloads
	// In this case, it saves the state of the furnace (burn time etc) and the itemstacks stored in the fuel, input, and output slots
	@Override
	public NBTTagCompound writeToNBT(NBTTagCompound parentNBTTagCompound)
	{
		super.writeToNBT(parentNBTTagCompound); // The super call is required to save and load the tiles location

//			// Save the stored item stacks

		// to use an analogy with Java, this code generates an array of hashmaps
		// The itemStack in each slot is converted to an NBTTagCompound, which is effectively a hashmap of key->value pairs such
		//   as slot=1, id=2353, count=1, etc
		// Each of these NBTTagCompound are then inserted into NBTTagList, which is similar to an array.
		NBTTagList dataForAllSlots = new NBTTagList();
		for (int i = 0; i < this.itemStacks.length; ++i) {
			if (this.itemStacks[i] != null) {
				NBTTagCompound dataForThisSlot = new NBTTagCompound();
				dataForThisSlot.setByte("Slot", (byte) i);
				this.itemStacks[i].writeToNBT(dataForThisSlot);
				dataForAllSlots.appendTag(dataForThisSlot);
			}
		}
		// the array of hashmaps is then inserted into the parent hashmap for the container
		parentNBTTagCompound.setTag("Items", dataForAllSlots);

		// Save everything else
		parentNBTTagCompound.setShort("CookTime", cookTime);
		parentNBTTagCompound.setTag("energyRemaining", new NBTTagInt(energyDP));
		parentNBTTagCompound.setTag("energyInitial", new NBTTagIntArray(energyInitial));
    return parentNBTTagCompound;
	}

	// This is where you load the data that you saved in writeToNBT
	@Override
	public void readFromNBT(NBTTagCompound nbtTagCompound)
	{
		super.readFromNBT(nbtTagCompound); // The super call is required to save and load the tiles location
		final byte NBT_TYPE_COMPOUND = 10;       // See NBTBase.createNewByType() for a listing
		NBTTagList dataForAllSlots = nbtTagCompound.getTagList("Items", NBT_TYPE_COMPOUND);

		Arrays.fill(itemStacks, null);           // set all slots to empty
		for (int i = 0; i < dataForAllSlots.tagCount(); ++i) {
			NBTTagCompound dataForOneSlot = dataForAllSlots.getCompoundTagAt(i);
			byte slotNumber = dataForOneSlot.getByte("Slot");
			if (slotNumber >= 0 && slotNumber < this.itemStacks.length) {
				this.itemStacks[slotNumber] = ItemStack.loadItemStackFromNBT(dataForOneSlot);
			}
		}

		// Load everything else.  Trim the arrays (or pad with 0) to make sure they have the correct number of elements
		cookTime = nbtTagCompound.getShort("CookTime");
		energyDP = nbtTagCompound.getInteger("energyRemaining");
		energyInitial = Arrays.copyOf(nbtTagCompound.getIntArray("energyInitial"), FUEL_SLOTS_COUNT);
		cachedNumberOfBurningSlots = -1;
	}

//		// When the world loads from disk, the server needs to send the TileEntity information to the client
//		//  it uses getUpdatePacket(), getUpdateTag(), onDataPacket(), and handleUpdateTag() to do this
  @Override
  @Nullable
  public SPacketUpdateTileEntity getUpdatePacket()
  {
    NBTTagCompound updateTagDescribingTileEntityState = getUpdateTag();
    final int METADATA = 0;
    return new SPacketUpdateTileEntity(this.pos, METADATA, updateTagDescribingTileEntityState);
  }

  @Override
  public void onDataPacket(NetworkManager net, SPacketUpdateTileEntity pkt) {
    NBTTagCompound updateTagDescribingTileEntityState = pkt.getNbtCompound();
    handleUpdateTag(updateTagDescribingTileEntityState);
  }

  /* Creates a tag containing the TileEntity information, used by vanilla to transmit from server to client
     Warning - although our getUpdatePacket() uses this method, vanilla also calls it directly, so don't remove it.
   */
  @Override
  public NBTTagCompound getUpdateTag()
  {
		NBTTagCompound nbtTagCompound = new NBTTagCompound();
		writeToNBT(nbtTagCompound);
    return nbtTagCompound;
  }

  /* Populates this TileEntity with information from the tag, used by vanilla to transmit from server to client
   Warning - although our onDataPacket() uses this method, vanilla also calls it directly, so don't remove it.
 */
  @Override
  public void handleUpdateTag(NBTTagCompound tag)
  {
    this.readFromNBT(tag);
  }
  //------------------------

	// set all slots to empty
	@Override
	public void clear() {
		Arrays.fill(itemStacks, null);
	}

	// will add a key for this container to the lang file so we can name it in the GUI
	@Override
	public String getName() {
		return "container.crystallizer.name";
	}

	@Override
	public boolean hasCustomName() {
		return false;
	}

	// standard code to look up what the human-readable name is
  @Nullable
  @Override
  public ITextComponent getDisplayName() {
		return this.hasCustomName() ? new TextComponentString(this.getName()) : new TextComponentTranslation(this.getName());
	}

	// Fields are used to send non-inventory information from the server to interested clients
	// The container code caches the fields and sends the client any fields which have changed.
	// The field ID is limited to byte, and the field value is limited to short. (if you use more than this, they get cast down
	//   in the network packets)
	// If you need more than this, or shorts are too small, use a custom packet in your container instead.

	private static final byte COOK_FIELD_ID = 0;
	private static final byte FIRST_BURN_TIME_REMAINING_FIELD_ID = 1;
	private static final byte FIRST_BURN_TIME_INITIAL_FIELD_ID = FIRST_BURN_TIME_REMAINING_FIELD_ID + (byte)FUEL_SLOTS_COUNT;
	private static final byte NUMBER_OF_FIELDS = FIRST_BURN_TIME_INITIAL_FIELD_ID + (byte)FUEL_SLOTS_COUNT;

	@Override
	public int getField(int id) {
		if (id == COOK_FIELD_ID) return cookTime;
		if (id >= FIRST_BURN_TIME_REMAINING_FIELD_ID && id < FIRST_BURN_TIME_REMAINING_FIELD_ID + FUEL_SLOTS_COUNT) {
			return energyDP;
		}
		if (id >= FIRST_BURN_TIME_INITIAL_FIELD_ID && id < FIRST_BURN_TIME_INITIAL_FIELD_ID + FUEL_SLOTS_COUNT) {
			return energyInitial[id - FIRST_BURN_TIME_INITIAL_FIELD_ID];
		}
		System.err.println("Invalid field ID in TileInventorySmelting.getField:" + id);
		return 0;
	}

	@Override
	public void setField(int id, int value)
	{
		if (id == COOK_FIELD_ID) {
			cookTime = (short)value;
		} else if (id >= FIRST_BURN_TIME_REMAINING_FIELD_ID && id < FIRST_BURN_TIME_REMAINING_FIELD_ID + FUEL_SLOTS_COUNT) {
			energyDP = value;
		} else if (id >= FIRST_BURN_TIME_INITIAL_FIELD_ID && id < FIRST_BURN_TIME_INITIAL_FIELD_ID + FUEL_SLOTS_COUNT) {
			energyInitial[id - FIRST_BURN_TIME_INITIAL_FIELD_ID] = value;
		} else {
			System.err.println("Invalid field ID in TileInventorySmelting.setField:" + id);
		}
	}

	@Override
	public int getFieldCount() {
		return NUMBER_OF_FIELDS;
	}

	@Override
	public boolean isItemValidForSlot(int slotIndex, ItemStack itemstack) {
		return false;
	}

	/**
	 * This method removes the entire contents of the given slot and returns it.
	 * Used by containers such as crafting tables which return any items in their slots when you close the GUI
	 * @param slotIndex
	 * @return
	 */
	@Override
	public ItemStack removeStackFromSlot(int slotIndex) {
		ItemStack itemStack = getStackInSlot(slotIndex);
		if (itemStack != null) setInventorySlotContents(slotIndex, null);
		return itemStack;
	}

	@Override
	public void openInventory(EntityPlayer player) {}

	@Override
	public void closeInventory(EntityPlayer player) {}

}

 

and GUI

 

package com.lambda.PlentifulMisc.client.gui;

import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

import java.awt.*;
import java.util.ArrayList;
import java.util.List;

import com.lambda.PlentifulMisc.blocks.container.ContainerCrystallizer;
import com.lambda.PlentifulMisc.blocks.tile.TileEnityCrystallizer;

/**
* User: brandon3055
* Date: 06/01/2015
*
* GuiInventoryAdvanced is a gui similar to that of a furnace. It has a progress bar and a burn time indicator.
* Both indicators have mouse over text
*/
@SideOnly(Side.CLIENT)
public class GuiCrystallizer extends GuiContainer {

// This is the resource location for the background image
private static final ResourceLocation texture = new ResourceLocation("plentifulmisc", "textures/gui/guiCrystallizer.png");
private TileEnityCrystallizer tileEntity;

public GuiCrystallizer(InventoryPlayer invPlayer, TileEnityCrystallizer tileInventoryFurnace) {
	super(new ContainerCrystallizer(invPlayer, tileInventoryFurnace));

	// Set the width and height of the gui
	xSize = 176;
	ySize = 207;

	this.tileEntity = tileInventoryFurnace;
}

// some [x,y] coordinates of graphical elements
final int COOK_BAR_XPOS = 49;
final int COOK_BAR_YPOS = 60;
final int COOK_BAR_ICON_U = 0;   // texture position of white arrow icon
final int COOK_BAR_ICON_V = 207;
final int COOK_BAR_WIDTH = 80;
final int COOK_BAR_HEIGHT = 17;

final int FLAME_XPOS = 54;
final int FLAME_YPOS = 80;
final int FLAME_ICON_U = 178;   // texture position of flame icon
final int FLAME_ICON_V = 0;
final int FLAME_WIDTH = 9;
final int FLAME_HEIGHT = 15;
final int FLAME_X_SPACING = 18;

final int ENERGY_XPOS = -12;
final int ENERGY_YPOS = 28;
final int ENERGY_ICON_U = 176;   // texture position of energy bar
final int ENERGY_ICON_V = 21;
final int ENERGY_WIDTH = 22;
final int ENERGY_HEIGHT = 80;
final int ENERGY_X_SPACING = 18;

@Override
protected void drawGuiContainerBackgroundLayer(float partialTicks, int x, int y) {
	// Bind the image texture
	Minecraft.getMinecraft().getTextureManager().bindTexture(texture);
	// Draw the image
	GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
	drawTexturedModalRect(guiLeft, guiTop, 0, 0, xSize, ySize);

	// get cook progress as a double between 0 and 1
	double cookProgress = tileEntity.fractionOfCookTimeComplete();
	// draw the cook progress bar
	drawTexturedModalRect(guiLeft + COOK_BAR_XPOS, guiTop + COOK_BAR_YPOS, COOK_BAR_ICON_U, COOK_BAR_ICON_V,
					              (int)(cookProgress * COOK_BAR_WIDTH), COOK_BAR_HEIGHT);

	// draw the fuel remaining bar for each fuel slot flame
		double burnRemaining = tileEntity.fractionOfFuelRemaining(0);
		int yOffset = (int)((1.0 - burnRemaining) * FLAME_HEIGHT);
		drawTexturedModalRect(guiLeft + FLAME_XPOS + FLAME_X_SPACING, guiTop + FLAME_YPOS + yOffset,
													FLAME_ICON_U, FLAME_ICON_V + yOffset, FLAME_WIDTH, FLAME_HEIGHT - yOffset);
		// draw energy bar

		double energyRemain = tileEntity.energyDP;
		int energyMax = tileEntity.energyMax;
		int yOffsetEnergy = (int)((energyRemain - energyMax) * ENERGY_HEIGHT);
		drawTexturedModalRect(guiLeft + ENERGY_XPOS + ENERGY_X_SPACING, guiTop + ENERGY_YPOS + yOffset,
													ENERGY_ICON_U, ENERGY_ICON_V + yOffset, ENERGY_WIDTH, ENERGY_HEIGHT - yOffset);
}

@Override
protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) {
	super.drawGuiContainerForegroundLayer(mouseX, mouseY);

	final int LABEL_XPOS = 5;
	final int LABEL_YPOS = 5;
	fontRendererObj.drawString(tileEntity.getDisplayName().getUnformattedText(), LABEL_XPOS, LABEL_YPOS, Color.darkGray.getRGB());

	List<String> hoveringText = new ArrayList<String>();

	// If the mouse is over the progress bar add the progress bar hovering text
	if (isInRect(guiLeft + COOK_BAR_XPOS, guiTop + COOK_BAR_YPOS, COOK_BAR_WIDTH, COOK_BAR_HEIGHT, mouseX, mouseY)){
		hoveringText.add("Progress:");
		int cookPercentage =(int)(tileEntity.fractionOfCookTimeComplete() * 100);
		hoveringText.add(cookPercentage + "%");
	}

	// If the mouse is over one of the burn time indicator add the burn time indicator hovering text
	for (int i = 0; i < tileEntity.FUEL_SLOTS_COUNT; ++i) {
		if (isInRect(guiLeft + FLAME_XPOS + FLAME_X_SPACING * i, guiTop + FLAME_YPOS, FLAME_WIDTH, FLAME_HEIGHT, mouseX, mouseY)) {
			hoveringText.add("Fuel Time:");
			hoveringText.add(tileEntity.secondsOfFuelRemaining(i) + "s");
		}
	}
		if (isInRect(guiLeft + ENERGY_XPOS + ENERGY_X_SPACING, guiTop + ENERGY_YPOS, ENERGY_WIDTH, ENERGY_HEIGHT, mouseX, mouseY)) {
			hoveringText.add("Energy Amount:");
			hoveringText.add(tileEntity.energyDP + " DP");
		}

	// If hoveringText is not empty draw the hovering text
	if (!hoveringText.isEmpty()){
		drawHoveringText(hoveringText, mouseX - guiLeft, mouseY - guiTop, fontRendererObj);
	}
//		// You must re bind the texture and reset the colour if you still need to use it after drawing a string
//		Minecraft.getMinecraft().getTextureManager().bindTexture(texture);
//		GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);

}

// Returns true if the given x,y coordinates are within the given rectangle
public static boolean isInRect(int x, int y, int xSize, int ySize, int mouseX, int mouseY){
	return ((mouseX >= x && mouseX <= x+xSize) && (mouseY >= y && mouseY <= y+ySize));
}
}

 

It does update its self with the hover function.

Not new to java >> New to modding.

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