Menu API Reference

Integrate custom menus below the mods menu item and create custom windows with interactive controls using the libmcpelauncher_menu.so library.

MenuEntryABI Structure

Defines a single menu entry with potential subentries.

struct MenuEntryABI {
    const char* name;                    // Name shown in the UI
    void* user;                          // Custom user data passed to callbacks
    bool (*selected)(void* user);       // Selection callback
    void (*click)(void* user);          // Click callback
    size_t length;                      // Number of subentries
    MenuEntryABI* subentries;           // Pointer to array of subentries
};

void mcpelauncher_addmenu(size_t length, MenuEntryABI* entries);

Adds a group of menu entries to the launcher.

• length: Number of items in entries
• entries: Pointer to array of MenuEntryABI

control Structure

Represents a UI control embedded in a window.

struct control {
    int type; // Enum-like control type
    union {
        struct {
            const char* label;
            void* user;
            void (*onClick)(void* user);
        } button;

        struct {
            const char* label;
            int min;
            int def;
            int max;
            void* user;
            void (*onChange)(void* user, int value);
        } sliderint;

        struct {
            const char* label;
            float min;
            float def;
            float max;
            void* user;
            void (*onChange)(void* user, float value);
        } sliderfloat;

        struct {
            const char* label;
            int size; // 0 = normal, 1 = small title
        } text;

        struct {
            const char* label;
            const char* def;
            const char* placeholder;
            void* user;
            void (*onChange)(void* user, const char* value);
        } textinput;
    } data;
};

Control Types

Set type to match the control structure being used:

• 0: Button
• 1: Slider (integer)
• 2: Slider (float)
• 3: Static text
• 4: Text input

void mcpelauncher_show_window(...)

Displays a window populated with interactive controls.

void mcpelauncher_show_window(
    const char* title,
    int isModal,
    void* user,
    void (*onClose)(void* user),
    int count,
    control* controls
);

Parameters

• title: Title displayed on the window
• isModal: Modal flag (non-zero blocks other inputs)
• user: Custom user data passed to callbacks
• onClose: Callback called when window closes
• count: Number of controls
• controls: Pointer to array of control structs

void mcpelauncher_close_window(const char* title);

Closes the window with the specified title.