package ui import ( "github.com/gdamore/tcell" ) const ( BORDER_LEFT = 1 << iota BORDER_TOP = 1 << iota BORDER_RIGHT = 1 << iota BORDER_BOTTOM = 1 << iota ) type Bordered struct { Invalidatable borders uint content Drawable onInvalidate func(d Drawable) } func NewBordered(content Drawable, borders uint) *Bordered { b := &Bordered{ borders: borders, content: content, } content.OnInvalidate(b.contentInvalidated) return b } func (bordered *Bordered) contentInvalidated(d Drawable) { bordered.Invalidate() } func (bordered *Bordered) Children() []Drawable { return []Drawable{bordered.content} } func (bordered *Bordered) Invalidate() { bordered.DoInvalidate(bordered) } func (bordered *Bordered) Draw(ctx *Context) { x := 0 y := 0 width := ctx.Width() height := ctx.Height() style := tcell.StyleDefault.Reverse(true) if bordered.borders&BORDER_LEFT != 0 { ctx.Fill(0, 0, 1, ctx.Height(), ' ', style) x += 1 width -= 1 } if bordered.borders&BORDER_TOP != 0 { ctx.Fill(0, 0, ctx.Width(), 1, ' ', style) y += 1 height -= 1 } if bordered.borders&BORDER_RIGHT != 0 { ctx.Fill(ctx.Width()-1, 0, 1, ctx.Height(), ' ', style) width -= 1 } if bordered.borders&BORDER_BOTTOM != 0 { ctx.Fill(0, ctx.Height()-1, ctx.Width(), 1, ' ', style) height -= 1 } subctx := ctx.Subcontext(x, y, width, height) bordered.content.Draw(subctx) } func (bordered *Bordered) MouseEvent(localX int, localY int, event tcell.Event) { switch content := bordered.content.(type) { case Mouseable: content.MouseEvent(localX, localY, event) } }