Create Guide button.

src/main/java/tconstruct/client/tabs/InventoryTabGuides.java

@@ -0,0 +1,46 @@
+package tconstruct.client.tabs;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Gui;
+import net.minecraft.util.ResourceLocation;
+import org.lwjgl.opengl.GL11;
+import somehussar.gui.guides.GuideController;
+
+public class InventoryTabGuides extends AbstractTab {
+    private static final ResourceLocation HELP_TEXTURE = new ResourceLocation("customnpcs", "textures/marks/question.png");
+    public InventoryTabGuides() {
+        super(0, 0, 0, null);
+    }
+
+    @Override
+    public void onTabClicked() {
+
+    }
+
+    @Override
+    public boolean shouldAddToList() {
+        return GuideController.isGuideLoaded();
+    }
+
+    @Override
+    public void drawButton(Minecraft mc, int mouseX, int mouseY) {
+        if (this.visible) {
+            GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
+            int yTexPos = this.enabled ? 3 : 32;
+            int ySize = this.enabled ? 25 : 32;
+            int xOffset = this.id == 2 ? 0 : 1;
+            int yPos = this.yPosition + (this.enabled ? 3 : 0);
+            mc.renderEngine.bindTexture(super.texture);
+            this.drawTexturedModalRect(this.xPosition, yPos, xOffset * 28,
+                yTexPos, 28, ySize);
+
+            this.zLevel = 100.0F;
+
+            mc.renderEngine.bindTexture(HELP_TEXTURE);
+            func_146110_a(xPosition + 6, yPosition + 8, 0, 0, 16, 16, 16, 16);
+
+            this.zLevel = 0.0F;
+
+        }
+    }
+}