44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
// Package internal holds drawing shared by MujicaUI components.
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package internal
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import (
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"math"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/theme"
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)
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// FocusRing strokes the keyboard ring outside r, leaving the focus gap.
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func FocusRing(p *ui.Painter, r ui.Rect, radius float32, c ui.Color) {
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o := theme.FocusGap + theme.FocusWidth
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p.Stroke(ui.Rect{X: r.X - o, Y: r.Y - o, W: r.W + 2*o, H: r.H + 2*o}, c, radius+o, theme.FocusWidth)
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}
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// Ring replaces MyGo's ring on e with the MujicaUI ring.
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func Ring(e *ui.Element, c ui.Color, radius float32) *ui.Element {
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return e.FocusRing(false).DrawOver(func(p *ui.Painter, r ui.Rect) {
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if e.FocusVisible() {
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FocusRing(p, r, radius, c)
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}
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})
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}
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// Diamond returns a rhombus of size s centered at (cx, cy).
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func Diamond(cx, cy, s float32) *ui.Path {
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var p ui.Path
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h := s / 2
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p.MoveTo(cx, cy-h)
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p.LineTo(cx+h, cy)
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p.LineTo(cx, cy+h)
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p.LineTo(cx-h, cy)
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p.Close()
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return &p
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}
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// Snap rounds v to MyGo's quarter-device-pixel path cache grid.
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func Snap(p *ui.Painter, v float32) float32 {
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g := 4 * p.Scale()
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return float32(math.Round(float64(v*g))) / g
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}
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