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package ui
import (
"github.com/gdamore/tcell"
)
// Drawable is a UI component that can draw. Unless specified, all methods must
// only be called from a single goroutine, the UI goroutine.
type Drawable interface {
// Called when this renderable should draw itself.
Draw(ctx *Context)
// Specifies a function to call when this cell needs to be redrawn. The
// callback may be called in any goroutine.
OnInvalidate(callback func(d Drawable))
// Invalidates the drawable. This can be called from any goroutine.
Invalidate()
}
type Interactive interface {
// Returns true if the event was handled by this component
Event(event tcell.Event) bool
// Indicates whether or not this control will receive input events
Focus(focus bool)
}
type Beeper interface {
OnBeep(func() error)
}
type Simulator interface {
// Queues up the given input events for simulation
Simulate(events []tcell.Event)
}
type DrawableInteractive interface {
Drawable
Interactive
}
type DrawableInteractiveBeeper interface {
DrawableInteractive
Beeper
}
// A drawable which contains other drawables
type Container interface {
Drawable
// Return all of the drawables which are children of this one (do not
// recurse into your grandchildren).
Children() []Drawable
}
type MouseHandler interface {
// Handle a mouse event which occurred at the local x and y positions
MouseEvent(localX int, localY int, event tcell.Event)
}
// A drawable that can be interacted with by the mouse
type Mouseable interface {
Drawable
MouseHandler
}
type MouseableDrawableInteractive interface {
DrawableInteractive
MouseHandler
}
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