forked from joejulian/gio
Chris Waldon
47 lines
928 B
Go
47 lines
928 B
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package widget
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import (
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"image/color"
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"gioui.org/f32"
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"gioui.org/layout"
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"gioui.org/op"
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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.Value
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Width unit.Value
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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 := float32(gtx.Px(b.CornerRadius))
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st := op.Save(gtx.Ops)
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width := gtx.Px(b.Width)
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sz.X -= width
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sz.Y -= width
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op.Offset(f32.Point{
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X: float32(width) * 0.5,
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Y: float32(width) * 0.5,
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}).Add(gtx.Ops)
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clip.Border{
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Rect: f32.Rectangle{
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Max: layout.FPt(sz),
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},
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NE: rr, NW: rr, SE: rr, SW: rr,
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Width: float32(width),
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}.Add(gtx.Ops)
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paint.ColorOp{Color: b.Color}.Add(gtx.Ops)
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paint.PaintOp{}.Add(gtx.Ops)
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st.Load()
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return dims
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}
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