Preserve player model rotation when toggling baubles inventory (#39)

src/main/java/baubles/client/gui/GuiEvents.java

@@ -55,7 +55,13 @@ public class GuiEvents {
 
 		if (event.gui instanceof GuiPlayerExpanded) {
 			if (event.button.id == 55) {
-				event.gui.mc.displayGuiScreen(new GuiInventory(event.gui.mc.thePlayer));
+				GuiPlayerExpanded expandedInventory = (GuiPlayerExpanded) event.gui;
+				GuiInventory inventory = new GuiInventory(event.gui.mc.thePlayer);
+				GuiInventoryReflectionHelper.setMousePosition(
+					inventory,
+					expandedInventory.getMouseX(),
+					expandedInventory.getMouseY());
+				event.gui.mc.displayGuiScreen(inventory);
 				PacketHandler.INSTANCE.sendToServer(new PacketOpenNormalInventory(event.gui.mc.thePlayer));
 			}
 		}

src/main/java/baubles/client/gui/GuiInventoryReflectionHelper.java

@@ -0,0 +1,29 @@
+package baubles.client.gui;
+
+import java.lang.reflect.Field;
+
+import cpw.mods.fml.relauncher.ReflectionHelper;
+import net.minecraft.client.gui.inventory.GuiInventory;
+
+final class GuiInventoryReflectionHelper {
+
+    private static final Field MOUSE_X = ReflectionHelper.findField(
+        GuiInventory.class,
+        "xSizeFloat",
+        "field_147048_u");
+    private static final Field MOUSE_Y = ReflectionHelper.findField(
+        GuiInventory.class,
+        "ySizeFloat",
+        "field_147047_v");
+
+    private GuiInventoryReflectionHelper() {}
+
+    static void setMousePosition(GuiInventory inventory, float mouseX, float mouseY) {
+        try {
+            MOUSE_X.setFloat(inventory, mouseX);
+            MOUSE_Y.setFloat(inventory, mouseY);
+        } catch (IllegalAccessException e) {
+            throw new IllegalStateException("Could not initialize the inventory mouse position", e);
+        }
+    }
+}

src/main/java/baubles/client/gui/GuiPlayerExpanded.java

@@ -113,9 +113,9 @@ public class GuiPlayerExpanded extends GuiContainer implements INEIGuiHandler {
      */
     @Override
     public void drawScreen(int mouseX, int mouseY, float partialTicks) {
-        super.drawScreen(mouseX, mouseY, partialTicks);
         xSizeFloat = (float) mouseX;
         ySizeFloat = (float) mouseY;
+        super.drawScreen(mouseX, mouseY, partialTicks);
 
         if(BaublesConfig.displayTooltipOnHover) {
             handleMouseHover(mouseX, mouseY);
@@ -124,6 +124,14 @@ public class GuiPlayerExpanded extends GuiContainer implements INEIGuiHandler {
         handleScrollbar(mouseX, mouseY);
     }
 
+    float getMouseX() {
+        return xSizeFloat;
+    }
+
+    float getMouseY() {
+        return ySizeFloat;
+    }
+
     @Override
     protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) {
         if (!useOldGuiRendering) {