const (
	// KeyShiftLeft represents the left shift key
	KeyShiftLeft fyne.KeyName = "LeftShift"
	// KeyShiftRight represents the right shift key
	KeyShiftRight fyne.KeyName = "RightShift"
	// KeyControlLeft represents the left control key
	KeyControlLeft fyne.KeyName = "LeftControl"
	// KeyControlRight represents the right control key
	KeyControlRight fyne.KeyName = "RightControl"
	// KeyAltLeft represents the left alt key
	KeyAltLeft fyne.KeyName = "LeftAlt"
	// KeyAltRight represents the right alt key
	KeyAltRight fyne.KeyName = "RightAlt"
	// KeySuperLeft represents the left "Windows" key (or "Command" key on macOS)
	KeySuperLeft fyne.KeyName = "LeftSuper"
	// KeySuperRight represents the right "Windows" key (or "Command" key on macOS)
	KeySuperRight fyne.KeyName = "RightSuper"
	// KeyMenu represents the left or right menu / application key
	KeyMenu fyne.KeyName = "Menu"
	// KeyPrintScreen represents the key used to cause a screen capture
	KeyPrintScreen fyne.KeyName = "PrintScreen"

	// KeyCapsLock represents the caps lock key, tapping once is the down event then again is the up
	KeyCapsLock fyne.KeyName = "CapsLock"
)

type Canvas interface {
	OnKeyDown() func(*fyne.KeyEvent)
	SetOnKeyDown(func(*fyne.KeyEvent))
	OnKeyUp() func(*fyne.KeyEvent)
	SetOnKeyUp(func(*fyne.KeyEvent))
}

type Cursor int

const (
	// DefaultCursor is the default cursor typically an arrow
	DefaultCursor Cursor = iota
	// TextCursor is the cursor often used to indicate text selection
	TextCursor
	// CrosshairCursor is the cursor often used to indicate bitmaps
	CrosshairCursor
	// PointerCursor is the cursor often used to indicate a link
	PointerCursor
	// HResizeCursor is the cursor often used to indicate horizontal resize
	HResizeCursor
	// VResizeCursor is the cursor often used to indicate vertical resize
	VResizeCursor
)

type Cursorable interface {
	Cursor() Cursor
}

type CustomShortcut struct {
	fyne.KeyName
	Modifier
}

type Driver interface {
	// Create a new borderless window that is centered on screen
	CreateSplashWindow() fyne.Window
}

type Hoverable interface {
	// MouseIn is a hook that is called if the mouse pointer enters the element.
	MouseIn(*MouseEvent)
	// MouseMoved is a hook that is called if the mouse pointer moved over the element.
	MouseMoved(*MouseEvent)
	// MouseOut is a hook that is called if the mouse pointer leaves the element.
	MouseOut()
}

type Keyable interface {
	fyne.Focusable

	KeyDown(*fyne.KeyEvent)
	KeyUp(*fyne.KeyEvent)
}

type Modifier int

const (
	// ShiftModifier represents a shift key being held
	ShiftModifier Modifier = 1 << iota
	// ControlModifier represents the ctrl key being held
	ControlModifier
	// AltModifier represents either alt keys being held
	AltModifier
	// SuperModifier represents either super keys being held
	SuperModifier
)

type MouseButton int

const (
	// LeftMouseButton is the most common mouse button - on some systems the only one
	LeftMouseButton MouseButton = iota + 1

	// RightMouseButton is the secondary button on most mouse input devices.
	RightMouseButton
)

type MouseEvent struct {
	fyne.PointEvent
	Button   MouseButton
	Modifier Modifier
}

type Mouseable interface {
	MouseDown(*MouseEvent)
	MouseUp(*MouseEvent)
}