gogol

type DefaultHandler struct {
	WindowTitle string
}

type Handler interface {
	// Ready is called once, after the window is created,
	// but before anything is drawn to the screen.
	Ready()

	// Reshape is called every time the window is resized.
	// The new width and height are passed as arguments.
	Reshape(w, h int)

	// Display is called on every frame, right before the
	// view is re-drawn. The time delta since the last frame
	// is passed as an argument.
	//
	// This is the recommend place to perform all drawing
	// operations.
	Display(delta time.Duration)

	// DisplayPost is called on every frame, after Display,
	// and after any post-processing effects have been applied.
	// This function is useful for drawing UI elements which
	// shouldn't be affected by image filters.
	DisplayPost()

	// Keyboard is called whenever a key is pressed or released.
	// The key is passed as an argument, as well as the state
	// of t
	Keyboard(k Key, isDown bool)

	// Mouse is called whenever the mouse is clicked.
	Mouse(button Mouse, isDown bool, x, y int)

	// Motion is called whenever the mouse is moved, with the x
	// and y position of the cursor.
	Motion(x, y int)

	// Entry is called when the mouse enters or exits the window.
	// true is passed if the mouse is entering, false is passed
	// if it is exiting.
	Entry(isEnter bool)

	// Title is called to set the title of the window.
	Title() string
}

type Key uint

type Mouse int