Input Manager

github.com/mechanical-lich/mlge/input

Translates raw Ebitengine mouse and keyboard input into events dispatched through the event system.

Setup

import (
    "github.com/mechanical-lich/mlge/event"
    "github.com/mechanical-lich/mlge/input"
)

inputManager := input.NewInputManager(event.GetInstance())

Call HandleInput() once per frame in your game’s Update() method:

func (g *Game) Update() error {
    g.inputManager.HandleInput()
    // ...
    return nil
}

Event Types

The input manager automatically fires the following events:

Mouse Events

Event Type	Struct	Fields
MouseClickEventType	MouseClickEvent	Button, X, Y
MouseReleasedEventType	MouseReleasedEvent	Button, X, Y
MouseMoveEventType	MouseMoveEvent	X, Y, OldX, OldY (int)
MouseWheelEventType	MouseWheelEvent	X, Y, OldX, OldY (float64)

Keyboard Events

Event Type	Struct	Fields
KeyPressEventType	KeyPressEvent	Keys []ebiten.Key, JustPressed bool
KeyReleaseEventType	KeyReleaseEvent	Keys []ebiten.Key

Handling Input Events

Register listeners through the event system:

type PlayerController struct{}

func (p *PlayerController) HandleEvent(data event.EventData) error {
    switch e := data.(type) {
    case *input.KeyPressEvent:
        if e.KeyPressed(ebiten.KeyArrowUp) {
            // Move player up
        }
    case *input.MouseClickEvent:
        // Handle click at e.X, e.Y
    }
    return nil
}

// Register
em := event.GetInstance()
em.RegisterListener(input.KeyPressEventType, &PlayerController{})
em.RegisterListener(input.MouseClickEventType, &PlayerController{})

KeyPressEvent Helpers

The KeyPressEvent provides a convenience method to check for specific keys:

func (e *KeyPressEvent) KeyPressed(key ebiten.Key) bool

The JustPressed field distinguishes between a key that was just pressed this frame vs. being held down.