Is there anyway of knowing which slot the player is currently mousing over? Also, what side would I be checking on? (Server or client)

Hi

 

Yes there is.  Look in GuiContainer.drawScreen for inspiration, in particular this bit

        for (int j1 = 0; j1 < this.inventorySlots.inventorySlots.size(); ++j1)
        {
            Slot slot = (Slot)this.inventorySlots.inventorySlots.get(j1);
            this.drawSlotInventory(slot);

            if (this.isMouseOverSlot(slot, par1, par2) && slot.func_111238_b())
            {
                this.theSlot = slot;
                GL11.glDisable(GL11.GL_LIGHTING);
                GL11.glDisable(GL11.GL_DEPTH_TEST);
                int k1 = slot.xDisplayPosition;
                i1 = slot.yDisplayPosition;
                this.drawGradientRect(k1, i1, k1 + 16, i1 + 16, -2130706433, -2130706433);
                GL11.glEnable(GL11.GL_LIGHTING);
                GL11.glEnable(GL11.GL_DEPTH_TEST);
            }
        }

 

par1, par2 are mouseXpos and mouseYpos, which you can get from

            int k = Mouse.getX() * i / this.mc.displayWidth;
            int l = j - Mouse.getY() * j / this.mc.displayHeight - 1;

(this.mc is Minecraft).  inventorySlots has public access.  Need to check mc.currentScreen is actually the inventory container, of course.

 

You will need to do it on client because none of this exists on the server.

 

-TGG

One small question, what do I plugin for i and j when finding the mouse's position?

 

int k = Mouse.getX() * i / this.mc.displayWidth;
int l = j - Mouse.getY() * j / this.mc.displayHeight - 1;

Hi

 

Ah, yeah, I should have copied that too (from EntityRenderer.updateCameraAndRender)

 

            ScaledResolution scaledresolution = new ScaledResolution(this.mc.gameSettings, this.mc.displayWidth, this.mc.displayHeight);
            int i = scaledresolution.getScaledWidth();
            int j = scaledresolution.getScaledHeight();
            int k = Mouse.getX() * i / this.mc.displayWidth;
            int l = j - Mouse.getY() * j / this.mc.displayHeight - 1;

 

-TGG