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package tview
import "maunium.net/go/tcell"
// Primitive is the top-most interface for all graphical primitives.
type Primitive interface {
// Draw draws this primitive onto the screen. Implementers can call the
// screen's ShowCursor() function but should only do so when they have focus.
// (They will need to keep track of this themselves.)
Draw(screen tcell.Screen)
// GetRect returns the current position of the primitive, x, y, width, and
// height.
GetRect() (int, int, int, int)
// SetRect sets a new position of the primitive.
SetRect(x, y, width, height int)
// InputHandler returns a handler which receives key events when it has focus.
// It is called by the Application class.
//
// A value of nil may also be returned, in which case this primitive cannot
// receive focus and will not process any key events.
//
// The handler will receive the key event and a function that allows it to
// set the focus to a different primitive, so that future key events are sent
// to that primitive.
//
// The Application's Draw() function will be called automatically after the
// handler returns.
//
// The Box class provides functionality to intercept keyboard input. If you
// subclass from Box, it is recommended that you wrap your handler using
// Box.WrapInputHandler() so you inherit that functionality.
InputHandler() func(event *tcell.EventKey, setFocus func(p Primitive))
MouseHandler() func(event *tcell.EventMouse, setFocus func(p Primitive))
PasteHandler() func(event *tcell.EventPaste)
// Focus is called by the application when the primitive receives focus.
// Implementers may call delegate() to pass the focus on to another primitive.
Focus(delegate func(p Primitive))
// Blur is called by the application when the primitive loses focus.
Blur()
// GetFocusable returns the item's Focusable.
GetFocusable() Focusable
}
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