96 lines
1.7 KiB
Go
96 lines
1.7 KiB
Go
package layout
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import (
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"fmt"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type DividerStyle uint8
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const (
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Solid DividerStyle = iota
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Dotted
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Dashed
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Double
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Ornament
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)
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type DividerOptions struct {
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Vertical bool
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Style DividerStyle
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// Slot is the ink; zero means Edge.
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Slot pixel.Slot
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}
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var diamond = pixel.MustSprite(`
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..#..
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.###.
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#####
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.###.
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..#..
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`)
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// Divider is a rule across its parent.
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func Divider(c *ui.Context, o DividerOptions) *ui.Element {
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k := pixel.K(c)
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ink := o.Slot
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if ink == pixel.Ink {
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ink = pixel.Edge
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}
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thick := [...]int{Solid: 1, Dotted: 1, Dashed: 1, Double: 3, Ornament: 5}
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if int(o.Style) >= len(thick) {
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panic(fmt.Sprintf("layout: unknown divider style %d", o.Style))
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}
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t := thick[o.Style]
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e := ui.Box(c).Role(ui.RoleNone)
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if o.Vertical {
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e.FillHeight().Width(k.D(t))
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} else {
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e.FillWidth().Height(k.D(t))
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}
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return e.Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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n := g.W
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if o.Vertical {
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n = g.H
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}
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line := func(at, from, n int) {
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x, y := from, at
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if o.Vertical {
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x, y = at, from
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}
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switch o.Style {
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case Dotted:
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w, h := n, 1
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if o.Vertical {
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w, h = 1, n
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}
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g.Checker(x, y, w, h, ink)
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case Dashed:
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rule(g, x, y, n, o.Vertical, 4, 2, ink)
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default:
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rule(g, x, y, n, o.Vertical, max(n, 1), 0, ink)
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}
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}
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switch o.Style {
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case Double:
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line(0, 0, n)
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line(2, 0, n)
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case Ornament:
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mid := n / 2
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line(2, 0, mid-4)
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line(2, mid+5, n-mid-5)
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if o.Vertical {
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g.Sprite(0, mid-2, diamond, 0, ink, 1)
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} else {
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g.Sprite(mid-2, 0, diamond, 0, ink, 1)
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}
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default:
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line(0, 0, n)
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}
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})
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}
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