72 lines
1.2 KiB
Go
72 lines
1.2 KiB
Go
|
package ui
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/mattn/go-runewidth"
|
||
|
|
tb "github.com/nsf/termbox-go"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
TEXT_LEFT = iota
|
||
|
|
TEXT_CENTER = iota
|
||
|
|
TEXT_RIGHT = iota
|
||
|
|
)
|
||
|
|
|
||
|
|
type Text struct {
|
||
|
|
text string
|
||
|
|
strategy uint
|
||
|
|
fg tb.Attribute
|
||
|
|
bg tb.Attribute
|
||
|
|
onInvalidate func(d Drawable)
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewText(text string) *Text {
|
||
|
|
return &Text{text: text}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (t *Text) Text(text string) *Text {
|
||
|
|
t.text = text
|
||
|
|
t.Invalidate()
|
||
|
|
return t
|
||
|
|
}
|
||
|
|
|
||
|
|
func (t *Text) Strategy(strategy uint) *Text {
|
||
|
|
t.strategy = strategy
|
||
|
|
t.Invalidate()
|
||
|
|
return t
|
||
|
|
}
|
||
|
|
|
||
|
|
func (t *Text) Color(fg tb.Attribute, bg tb.Attribute) *Text {
|
||
|
|
t.fg = fg
|
||
|
|
t.bg = bg
|
||
|
|
t.Invalidate()
|
||
|
|
return t
|
||
|
|
}
|
||
|
|
|
||
|
|
func (t *Text) Draw(ctx *Context) {
|
||
|
|
size := runewidth.StringWidth(t.text)
|
||
|
|
cell := tb.Cell{
|
||
|
|
Ch: ' ',
|
||
|
|
Fg: t.fg,
|
||
|
|
Bg: t.bg,
|
||
|
|
}
|
||
|
|
x := 0
|
||
|
|
if t.strategy == TEXT_CENTER {
|
||
|
|
x = (ctx.Width() - size) / 2
|
||
|
|
}
|
||
|
|
if t.strategy == TEXT_RIGHT {
|
||
|
|
x = ctx.Width() - size
|
||
|
|
}
|
||
|
|
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), cell)
|
||
|
|
ctx.Printf(x, 0, cell, "%s", t.text)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (t *Text) OnInvalidate(onInvalidate func(d Drawable)) {
|
||
|
|
t.onInvalidate = onInvalidate
|
||
|
|
}
|
||
|
|
|
||
|
|
func (t *Text) Invalidate() {
|
||
|
|
if t.onInvalidate != nil {
|
||
|
|
t.onInvalidate(t)
|
||
|
|
}
|
||
|
|
}
|