2 files changed, 40 insertions, 0 deletions
diff --git a/src/main/java/gregtech/api/interfaces/IGuiScreen.java b/src/main/java/gregtech/api/interfaces/IGuiScreen.java
new file mode 100644
index 0000000000..d0089afbb8
--- /dev/null
+++ b/src/main/java/gregtech/api/interfaces/IGuiScreen.java
@@ -0,0 +1,35 @@
+package gregtech.api.interfaces;
+
+import gregtech.api.gui.widgets.GT_GuiTooltip;
+import net.minecraft.client.gui.FontRenderer;
+import net.minecraft.client.gui.GuiButton;
+import net.minecraft.client.renderer.entity.RenderItem;
+
+
+public interface IGuiScreen {
+
+    interface IGuiElement {
+        void onInit();
+        void draw(int mouseX, int mouseY, float parTicks);
+    }
+
+    void addToolTip(GT_GuiTooltip toolTip);
+
+    boolean removeToolTip(GT_GuiTooltip toolTip);
+
+    GuiButton getSelectedButton();
+    void clearSelectedButton();
+    void buttonClicked(GuiButton button);
+
+    int getGuiLeft();
+    int getGuiTop();
+
+    int getXSize();
+    int getYSize();
+
+    void addElement(IGuiElement element);
+    boolean removeElement(IGuiElement element);
+
+    RenderItem getItemRenderer();
+    FontRenderer getFontRenderer();
+}
diff --git a/src/main/java/gregtech/api/interfaces/tileentity/ICoverable.java b/src/main/java/gregtech/api/interfaces/tileentity/ICoverable.java
index 912dc554c0..76d121b8da 100644
--- a/src/main/java/gregtech/api/interfaces/tileentity/ICoverable.java
+++ b/src/main/java/gregtech/api/interfaces/tileentity/ICoverable.java
@@ -41,4 +41,9 @@ public interface ICoverable extends IRedstoneTileEntity, IHasInventory, IBasicEn
      * Sends 6 Integers to Client + causes @issueTextureUpdate()
      */
     void issueCoverUpdate(byte aSide);
+
+    /**
+     * Receiving a packet with cover data.
+     */
+    void receiveCoverData(byte coverSide, int coverID, int coverData);
 }
 \ No newline at end of file