001    package net.minecraft.src;
002    
003    import cpw.mods.fml.common.Side;
004    import cpw.mods.fml.common.asm.SideOnly;
005    import java.io.ByteArrayOutputStream;
006    import java.io.DataOutputStream;
007    import org.lwjgl.opengl.GL11;
008    import org.lwjgl.opengl.GL12;
009    
010    @SideOnly(Side.CLIENT)
011    public class GuiMerchant extends GuiContainer
012    {
013        private IMerchant field_74203_o;
014        private GuiButtonMerchant nextRecipeButtonIndex;
015        private GuiButtonMerchant previousRecipeButtonIndex;
016        private int currentRecipeIndex = 0;
017    
018        public GuiMerchant(InventoryPlayer par1InventoryPlayer, IMerchant par2IMerchant, World par3World)
019        {
020            super(new ContainerMerchant(par1InventoryPlayer, par2IMerchant, par3World));
021            this.field_74203_o = par2IMerchant;
022        }
023    
024        /**
025         * Adds the buttons (and other controls) to the screen in question.
026         */
027        public void initGui()
028        {
029            super.initGui();
030            int var1 = (this.width - this.xSize) / 2;
031            int var2 = (this.height - this.ySize) / 2;
032            this.controlList.add(this.nextRecipeButtonIndex = new GuiButtonMerchant(1, var1 + 120 + 27, var2 + 24 - 1, true));
033            this.controlList.add(this.previousRecipeButtonIndex = new GuiButtonMerchant(2, var1 + 36 - 19, var2 + 24 - 1, false));
034            this.nextRecipeButtonIndex.enabled = false;
035            this.previousRecipeButtonIndex.enabled = false;
036        }
037    
038        /**
039         * Draw the foreground layer for the GuiContainer (everything in front of the items)
040         */
041        protected void drawGuiContainerForegroundLayer()
042        {
043            this.fontRenderer.drawString(StatCollector.translateToLocal("entity.Villager.name"), 56, 6, 4210752);
044            this.fontRenderer.drawString(StatCollector.translateToLocal("container.inventory"), 8, this.ySize - 96 + 2, 4210752);
045        }
046    
047        /**
048         * Called from the main game loop to update the screen.
049         */
050        public void updateScreen()
051        {
052            super.updateScreen();
053            MerchantRecipeList var1 = this.field_74203_o.getRecipes(this.mc.thePlayer);
054    
055            if (var1 != null)
056            {
057                this.nextRecipeButtonIndex.enabled = this.currentRecipeIndex < var1.size() - 1;
058                this.previousRecipeButtonIndex.enabled = this.currentRecipeIndex > 0;
059            }
060        }
061    
062        /**
063         * Fired when a control is clicked. This is the equivalent of ActionListener.actionPerformed(ActionEvent e).
064         */
065        protected void actionPerformed(GuiButton par1GuiButton)
066        {
067            boolean var2 = false;
068    
069            if (par1GuiButton == this.nextRecipeButtonIndex)
070            {
071                ++this.currentRecipeIndex;
072                var2 = true;
073            }
074            else if (par1GuiButton == this.previousRecipeButtonIndex)
075            {
076                --this.currentRecipeIndex;
077                var2 = true;
078            }
079    
080            if (var2)
081            {
082                ((ContainerMerchant)this.inventorySlots).setCurrentRecipeIndex(this.currentRecipeIndex);
083                ByteArrayOutputStream var3 = new ByteArrayOutputStream();
084                DataOutputStream var4 = new DataOutputStream(var3);
085    
086                try
087                {
088                    var4.writeInt(this.currentRecipeIndex);
089                    this.mc.getSendQueue().addToSendQueue(new Packet250CustomPayload("MC|TrSel", var3.toByteArray()));
090                }
091                catch (Exception var6)
092                {
093                    var6.printStackTrace();
094                }
095            }
096        }
097    
098        /**
099         * Draw the background layer for the GuiContainer (everything behind the items)
100         */
101        protected void drawGuiContainerBackgroundLayer(float par1, int par2, int par3)
102        {
103            int var4 = this.mc.renderEngine.getTexture("/gui/trading.png");
104            GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
105            this.mc.renderEngine.bindTexture(var4);
106            int var5 = (this.width - this.xSize) / 2;
107            int var6 = (this.height - this.ySize) / 2;
108            this.drawTexturedModalRect(var5, var6, 0, 0, this.xSize, this.ySize);
109        }
110    
111        /**
112         * Draws the screen and all the components in it.
113         */
114        public void drawScreen(int par1, int par2, float par3)
115        {
116            super.drawScreen(par1, par2, par3);
117            MerchantRecipeList var4 = this.field_74203_o.getRecipes(this.mc.thePlayer);
118    
119            if (var4 != null && !var4.isEmpty())
120            {
121                int var5 = (this.width - this.xSize) / 2;
122                int var6 = (this.height - this.ySize) / 2;
123                GL11.glPushMatrix();
124                int var7 = this.currentRecipeIndex;
125                MerchantRecipe var8 = (MerchantRecipe)var4.get(var7);
126                ItemStack var9 = var8.getItemToBuy();
127                ItemStack var10 = var8.getSecondItemToBuy();
128                ItemStack var11 = var8.getItemToSell();
129                RenderHelper.enableGUIStandardItemLighting();
130                GL11.glDisable(GL11.GL_LIGHTING);
131                GL11.glEnable(GL12.GL_RESCALE_NORMAL);
132                GL11.glEnable(GL11.GL_COLOR_MATERIAL);
133                GL11.glEnable(GL11.GL_LIGHTING);
134                itemRenderer.zLevel = 100.0F;
135                itemRenderer.renderItemIntoGUI(this.fontRenderer, this.mc.renderEngine, var9, var5 + 36, var6 + 24);
136                itemRenderer.renderItemOverlayIntoGUI(this.fontRenderer, this.mc.renderEngine, var9, var5 + 36, var6 + 24);
137    
138                if (var10 != null)
139                {
140                    itemRenderer.renderItemIntoGUI(this.fontRenderer, this.mc.renderEngine, var10, var5 + 62, var6 + 24);
141                    itemRenderer.renderItemOverlayIntoGUI(this.fontRenderer, this.mc.renderEngine, var10, var5 + 62, var6 + 24);
142                }
143    
144                itemRenderer.renderItemIntoGUI(this.fontRenderer, this.mc.renderEngine, var11, var5 + 120, var6 + 24);
145                itemRenderer.renderItemOverlayIntoGUI(this.fontRenderer, this.mc.renderEngine, var11, var5 + 120, var6 + 24);
146                itemRenderer.zLevel = 0.0F;
147                GL11.glDisable(GL11.GL_LIGHTING);
148    
149                if (this.func_74188_c(36, 24, 16, 16, par1, par2))
150                {
151                    this.func_74184_a(var9, par1, par2);
152                }
153                else if (var10 != null && this.func_74188_c(62, 24, 16, 16, par1, par2))
154                {
155                    this.func_74184_a(var10, par1, par2);
156                }
157                else if (this.func_74188_c(120, 24, 16, 16, par1, par2))
158                {
159                    this.func_74184_a(var11, par1, par2);
160                }
161    
162                GL11.glPopMatrix();
163                GL11.glEnable(GL11.GL_LIGHTING);
164                GL11.glEnable(GL11.GL_DEPTH_TEST);
165                RenderHelper.enableStandardItemLighting();
166            }
167        }
168    
169        public IMerchant func_74199_h()
170        {
171            return this.field_74203_o;
172        }
173    }