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https://git.sr.ht/~eliasnaur/gio
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Elias Naur
45 lines
800 B
Go
45 lines
800 B
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package widget
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import (
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"image"
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"image/color"
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"gioui.org/layout"
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"gioui.org/op/clip"
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"gioui.org/op/paint"
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"gioui.org/unit"
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)
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// Border lays out a widget and draws a border inside it.
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type Border struct {
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Color color.NRGBA
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CornerRadius unit.Dp
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Width unit.Dp
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}
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func (b Border) Layout(gtx layout.Context, w layout.Widget) layout.Dimensions {
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dims := w(gtx)
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sz := dims.Size
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rr := gtx.Dp(b.CornerRadius)
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width := gtx.Dp(b.Width)
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whalf := (width + 1) / 2
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sz.X -= whalf * 2
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sz.Y -= whalf * 2
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r := image.Rectangle{Max: sz}
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r = r.Add(image.Point{X: whalf, Y: whalf})
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paint.FillShape(gtx.Ops,
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b.Color,
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clip.Stroke{
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Path: clip.UniformRRect(r, rr).Path(gtx.Ops),
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Width: float32(width),
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}.Op(),
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)
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return dims
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}
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