    001package net.minecraft.client.gui;
    002
    003import cpw.mods.fml.relauncher.Side;
    004import cpw.mods.fml.relauncher.SideOnly;
    005import java.io.ByteArrayOutputStream;
    006import java.io.DataOutputStream;
    007import net.minecraft.client.gui.inventory.GuiContainer;
    008import net.minecraft.client.renderer.RenderHelper;
    009import net.minecraft.entity.IMerchant;
    010import net.minecraft.entity.player.InventoryPlayer;
    011import net.minecraft.inventory.ContainerMerchant;
    012import net.minecraft.item.ItemStack;
    013import net.minecraft.network.packet.Packet250CustomPayload;
    014import net.minecraft.util.StatCollector;
    015import net.minecraft.village.MerchantRecipe;
    016import net.minecraft.village.MerchantRecipeList;
    017import net.minecraft.world.World;
    018import org.lwjgl.opengl.GL11;
    019import org.lwjgl.opengl.GL12;
    020
    021@SideOnly(Side.CLIENT)
    022public class GuiMerchant extends GuiContainer
    023{
    024    /** Instance of IMerchant interface. */
    025    private IMerchant theIMerchant;
    026    private GuiButtonMerchant nextRecipeButtonIndex;
    027    private GuiButtonMerchant previousRecipeButtonIndex;
    028    private int currentRecipeIndex = 0;
    029    private String field_94082_v;
    030
    031    public GuiMerchant(InventoryPlayer par1, IMerchant par2, World par3World, String par4)
    032    {
    033        super(new ContainerMerchant(par1, par2, par3World));
    034        this.theIMerchant = par2;
    035        this.field_94082_v = par4 != null && par4.length() >= 1 ? par4 : StatCollector.translateToLocal("entity.Villager.name");
    036    }
    037
    038    /**
    039     * Adds the buttons (and other controls) to the screen in question.
    040     */
    041    public void initGui()
    042    {
    043        super.initGui();
    044        int i = (this.width - this.xSize) / 2;
    045        int j = (this.height - this.ySize) / 2;
    046        this.buttonList.add(this.nextRecipeButtonIndex = new GuiButtonMerchant(1, i + 120 + 27, j + 24 - 1, true));
    047        this.buttonList.add(this.previousRecipeButtonIndex = new GuiButtonMerchant(2, i + 36 - 19, j + 24 - 1, false));
    048        this.nextRecipeButtonIndex.enabled = false;
    049        this.previousRecipeButtonIndex.enabled = false;
    050    }
    051
    052    /**
    053     * Draw the foreground layer for the GuiContainer (everything in front of the items)
    054     */
    055    protected void drawGuiContainerForegroundLayer(int par1, int par2)
    056    {
    057        this.fontRenderer.drawString(this.field_94082_v, this.xSize / 2 - this.fontRenderer.getStringWidth(this.field_94082_v) / 2, 6, 4210752);
    058        this.fontRenderer.drawString(StatCollector.translateToLocal("container.inventory"), 8, this.ySize - 96 + 2, 4210752);
    059    }
    060
    061    /**
    062     * Called from the main game loop to update the screen.
    063     */
    064    public void updateScreen()
    065    {
    066        super.updateScreen();
    067        MerchantRecipeList merchantrecipelist = this.theIMerchant.getRecipes(this.mc.thePlayer);
    068
    069        if (merchantrecipelist != null)
    070        {
    071            this.nextRecipeButtonIndex.enabled = this.currentRecipeIndex < merchantrecipelist.size() - 1;
    072            this.previousRecipeButtonIndex.enabled = this.currentRecipeIndex > 0;
    073        }
    074    }
    075
    076    /**
    077     * Fired when a control is clicked. This is the equivalent of ActionListener.actionPerformed(ActionEvent e).
    078     */
    079    protected void actionPerformed(GuiButton par1GuiButton)
    080    {
    081        boolean flag = false;
    082
    083        if (par1GuiButton == this.nextRecipeButtonIndex)
    084        {
    085            ++this.currentRecipeIndex;
    086            flag = true;
    087        }
    088        else if (par1GuiButton == this.previousRecipeButtonIndex)
    089        {
    090            --this.currentRecipeIndex;
    091            flag = true;
    092        }
    093
    094        if (flag)
    095        {
    096            ((ContainerMerchant)this.inventorySlots).setCurrentRecipeIndex(this.currentRecipeIndex);
    097            ByteArrayOutputStream bytearrayoutputstream = new ByteArrayOutputStream();
    098            DataOutputStream dataoutputstream = new DataOutputStream(bytearrayoutputstream);
    099
    100            try
    101            {
    102                dataoutputstream.writeInt(this.currentRecipeIndex);
    103                this.mc.getNetHandler().addToSendQueue(new Packet250CustomPayload("MC|TrSel", bytearrayoutputstream.toByteArray()));
    104            }
    105            catch (Exception exception)
    106            {
    107                exception.printStackTrace();
    108            }
    109        }
    110    }
    111
    112    /**
    113     * Draw the background layer for the GuiContainer (everything behind the items)
    114     */
    115    protected void drawGuiContainerBackgroundLayer(float par1, int par2, int par3)
    116    {
    117        GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
    118        this.mc.renderEngine.func_98187_b("/gui/trading.png");
    119        int k = (this.width - this.xSize) / 2;
    120        int l = (this.height - this.ySize) / 2;
    121        this.drawTexturedModalRect(k, l, 0, 0, this.xSize, this.ySize);
    122        MerchantRecipeList merchantrecipelist = this.theIMerchant.getRecipes(this.mc.thePlayer);
    123
    124        if (merchantrecipelist != null && !merchantrecipelist.isEmpty())
    125        {
    126            int i1 = this.currentRecipeIndex;
    127            MerchantRecipe merchantrecipe = (MerchantRecipe)merchantrecipelist.get(i1);
    128
    129            if (merchantrecipe.func_82784_g())
    130            {
    131                this.mc.renderEngine.func_98187_b("/gui/trading.png");
    132                GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
    133                GL11.glDisable(GL11.GL_LIGHTING);
    134                this.drawTexturedModalRect(this.guiLeft + 83, this.guiTop + 21, 212, 0, 28, 21);
    135                this.drawTexturedModalRect(this.guiLeft + 83, this.guiTop + 51, 212, 0, 28, 21);
    136            }
    137        }
    138    }
    139
    140    /**
    141     * Draws the screen and all the components in it.
    142     */
    143    public void drawScreen(int par1, int par2, float par3)
    144    {
    145        super.drawScreen(par1, par2, par3);
    146        MerchantRecipeList merchantrecipelist = this.theIMerchant.getRecipes(this.mc.thePlayer);
    147
    148        if (merchantrecipelist != null && !merchantrecipelist.isEmpty())
    149        {
    150            int k = (this.width - this.xSize) / 2;
    151            int l = (this.height - this.ySize) / 2;
    152            int i1 = this.currentRecipeIndex;
    153            MerchantRecipe merchantrecipe = (MerchantRecipe)merchantrecipelist.get(i1);
    154            GL11.glPushMatrix();
    155            ItemStack itemstack = merchantrecipe.getItemToBuy();
    156            ItemStack itemstack1 = merchantrecipe.getSecondItemToBuy();
    157            ItemStack itemstack2 = merchantrecipe.getItemToSell();
    158            RenderHelper.enableGUIStandardItemLighting();
    159            GL11.glDisable(GL11.GL_LIGHTING);
    160            GL11.glEnable(GL12.GL_RESCALE_NORMAL);
    161            GL11.glEnable(GL11.GL_COLOR_MATERIAL);
    162            GL11.glEnable(GL11.GL_LIGHTING);
    163            itemRenderer.zLevel = 100.0F;
    164            itemRenderer.renderItemAndEffectIntoGUI(this.fontRenderer, this.mc.renderEngine, itemstack, k + 36, l + 24);
    165            itemRenderer.renderItemOverlayIntoGUI(this.fontRenderer, this.mc.renderEngine, itemstack, k + 36, l + 24);
    166
    167            if (itemstack1 != null)
    168            {
    169                itemRenderer.renderItemAndEffectIntoGUI(this.fontRenderer, this.mc.renderEngine, itemstack1, k + 62, l + 24);
    170                itemRenderer.renderItemOverlayIntoGUI(this.fontRenderer, this.mc.renderEngine, itemstack1, k + 62, l + 24);
    171            }
    172
    173            itemRenderer.renderItemAndEffectIntoGUI(this.fontRenderer, this.mc.renderEngine, itemstack2, k + 120, l + 24);
    174            itemRenderer.renderItemOverlayIntoGUI(this.fontRenderer, this.mc.renderEngine, itemstack2, k + 120, l + 24);
    175            itemRenderer.zLevel = 0.0F;
    176            GL11.glDisable(GL11.GL_LIGHTING);
    177
    178            if (this.isPointInRegion(36, 24, 16, 16, par1, par2))
    179            {
    180                this.drawItemStackTooltip(itemstack, par1, par2);
    181            }
    182            else if (itemstack1 != null && this.isPointInRegion(62, 24, 16, 16, par1, par2))
    183            {
    184                this.drawItemStackTooltip(itemstack1, par1, par2);
    185            }
    186            else if (this.isPointInRegion(120, 24, 16, 16, par1, par2))
    187            {
    188                this.drawItemStackTooltip(itemstack2, par1, par2);
    189            }
    190
    191            GL11.glPopMatrix();
    192            GL11.glEnable(GL11.GL_LIGHTING);
    193            GL11.glEnable(GL11.GL_DEPTH_TEST);
    194            RenderHelper.enableStandardItemLighting();
    195        }
    196    }
    197
    198    /**
    199     * Gets the Instance of IMerchant interface.
    200     */
    201    public IMerchant getIMerchant()
    202    {
    203        return this.theIMerchant;
    204    }
    205}