001    package cpw.mods.fml.client;
002    
003    import net.minecraft.client.gui.FontRenderer;
004    import net.minecraft.client.gui.GuiErrorScreen;
005    import cpw.mods.fml.common.IFMLHandledException;
006    import cpw.mods.fml.relauncher.Side;
007    import cpw.mods.fml.relauncher.SideOnly;
008    
009    /**
010     * If a mod throws this exception during loading, it will be called back to render
011     * the error screen through the methods below. This error will not be cleared, and will
012     * not allow the game to carry on, but might be useful if your mod wishes to report
013     * a fatal configuration error in a pretty way.
014     *
015     * Throw this through a proxy. It won't work on the dedicated server environment.
016     * @author cpw
017     *
018     */
019    @SideOnly(Side.CLIENT)
020    public abstract class CustomModLoadingErrorDisplayException extends RuntimeException implements IFMLHandledException
021    {
022        /**
023         * Called after the GUI is inited by the parent code. You can do extra stuff here, maybe?
024         *
025         * @param errorScreen The error screen we're painting
026         * @param fontRenderer A font renderer for you
027         */
028        public abstract void initGui(GuiErrorScreen errorScreen, FontRenderer fontRenderer);
029    
030        /**
031         * Draw your error to the screen.
032         *
033         * <br/><em>Warning: Minecraft is in a deep error state.</em> <strong>All</strong> it can do is stop.
034         * Do not try and do anything involving complex user interaction here.
035         *
036         * @param errorScreen The error screen to draw to
037         * @param fontRenderer A font renderer for you
038         * @param mouseRelX Mouse X
039         * @param mouseRelY Mouse Y
040         * @param tickTime tick time
041         */
042        public abstract void drawScreen(GuiErrorScreen errorScreen, FontRenderer fontRenderer, int mouseRelX, int mouseRelY, float tickTime);
043    }