gregoryv/draw

package shape

import (
    "io"

    "github.com/gregoryv/draw"
    "github.com/gregoryv/draw/xy"
    "github.com/gregoryv/nexus"
)

func NewState(title string) *State {
    return &State{
        Title: title,
        Font:  draw.DefaultFont,
        Pad:   draw.DefaultTextPad,
        class: "state",
    }
}

type State struct {
    x, y  int
    Title string

    Font  draw.Font
    Pad   draw.Padding
    class string
}

func (r *State) Position() (x int, y int) { return r.x, r.y }
func (r *State) SetX(x int)               { r.x = x }
func (r *State) SetY(y int)               { r.y = y }
func (r *State) Direction() Direction     { return DirectionRight }
func (r *State) SetClass(c string)        { r.class = c }

func (r *State) WriteSVG(out io.Writer) error {
    w, err := nexus.NewPrinter(out)
    w.Printf(
        `<rect class="%s" x="%v" y="%v" width="%v" height="%v"/>`,
        r.class, r.x, r.y, r.Width(), r.Height())
    w.Printf("\n")
    r.title().WriteSVG(w)
    return *err
}

func (r *State) title() *Label {
    return &Label{
        x:     r.x + r.Pad.Left,
        y:     r.y + r.Pad.Top/2,
        Font:  r.Font,
        text:  r.Title,
        class: "state-title",
    }
}

func (r *State) SetFont(f draw.Font)         { r.Font = f }
func (r *State) SetTextPad(pad draw.Padding) { r.Pad = pad }

func (r *State) Height() int {
    return boxHeight(r.Font, r.Pad, 1)
}

func (r *State) Width() int {
    return boxWidth(r.Font, r.Pad, r.Title)
}

// Edge returns intersecting position of a line starting at start and
// pointing to the rect center.
func (r *State) Edge(start xy.Point) xy.Point {
    return boxEdge(start, r)
}