Renderer interface

This commit is contained in:
Zack Guo 2015-02-03 09:07:31 -05:00
commit 70bd0b02f3
3 changed files with 130 additions and 0 deletions

98
box.go Normal file
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package termui
import tm "github.com/nsf/termbox-go"
const TOP_RIGHT = '┐'
const VERTICAL_LINE = '│'
const HORIZONTAL_LINE = '─'
const TOP_LEFT = '┌'
const BOTTOM_RIGHT = '┘'
const BOTTOM_LEFT = '└'
type Box struct {
X int
Y int
Width int
Height int
Border bool
FgColor tm.Attribute
BgColor tm.Attribute
}
type HLine struct {
X int
Y int
Length int
FgColor tm.Attribute
BgColor tm.Attribute
}
type VLine struct {
X int
Y int
Length int
FgColor tm.Attribute
BgColor tm.Attribute
}
func (l HLine) Buffer() []Point{
pts := make([]Point,l.Length)
for i:=0;i<l.Length;i++{
pts[i].X = l.X+i
pts[i].Y = l.Y
pts[i].Code.Ch = HORIZONTAL_LINE
pts[i].Code.Bg = l.BgColor
pts[i].Code.Fg = l.FgColor
}
return pts
}
func (l VLine) Buffer() []Point{
pts := make([]Point,l.Length)
for i:=0;i<l.Length;i++{
pts[i].X = l.X
pts[i].Y = l.Y+i
pts[i].Code.Ch = VERTICAL_LINE
pts[i].Code.Bg = l.BgColor
pts[i].Code.Fg = l.FgColor
}
return pts
}
func (b Box) Buffer() []Point{
if b.Width<2 || b.Height<2 {
return nil
}
pts := make([]Point,2*b.Width+2*b.Height-4)
pts[0].X = b.X
pts[0].Y = b.Y
pts[0].Code.Fg = b.FgColor
pts[0].Code.Bg = b.BgColor
pts[0].Code.Ch = TOP_LEFT
pts[1].X = b.X+b.Width-1
pts[1].Y = b.Y
pts[1].Code.Fg = b.FgColor
pts[1].Code.Bg = b.BgColor
pts[1].Code.Ch = TOP_RIGHT
pts[2].X = b.X
pts[2].Y = b.Y+b.Height-1
pts[2].Code.Fg = b.FgColor
pts[2].Code.Bg = b.BgColor
pts[2].Code.Ch = BOTTOM_LEFT
pts[3].X = b.X+b.Width-1
pts[3].Y = b.Y+b.Height-1
pts[3].Code.Fg = b.FgColor
pts[3].Code.Bg = b.BgColor
pts[3].Code.Ch = BOTTOM_RIGHT
copy(pts[4:],(HLine{b.X+1,b.Y,b.Width-2,b.FgColor,b.BgColor}).Buffer())
copy(pts[4+b.Width-2:],(HLine{b.X+1,b.Y+b.Height-1,b.Width-2,b.FgColor,b.BgColor}).Buffer())
copy(pts[4+2*b.Width-4:],(VLine{b.X,b.Y+1,b.Height-2,b.FgColor,b.BgColor}).Buffer())
copy(pts[4+2*b.Width-4+b.Height-2:],(VLine{b.X+b.Width-1,b.Y+1,b.Height-2,b.FgColor,b.BgColor}).Buffer())
return pts
}

9
point.go Normal file
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package termui
import tm "github.com/nsf/termbox-go"
type Point struct {
Code tm.Cell
X int
Y int
}

23
render.go Normal file
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package termui
import tm "github.com/nsf/termbox-go"
type Renderer interface {
Buffer() []Point
}
func Init() error {
return tm.Init()
}
func Close(){
tm.Close()
}
func Render(r Renderer) {
buf := r.Buffer()
for _,v := range buf {
tm.SetCell(v.X,v.Y,v.Code.Ch,v.Code.Fg,v.Code.Bg)
}
tm.Flush()
}