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https://git.sr.ht/~eliasnaur/gio
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Egon Elbre
21ef492cc9
color.RGBA has two problems with regards to using it. First the color values need to be premultiplied, whereas most APIs have non-premultiplied values. This is mainly to preserve color components with low alpha values. Second there are two ways to premultiply with sRGB. One is to premultiply after sRGB conversion, the other is before. This makes using the API more confusing. Using color.NRGBA in sRGB makes it align with CSS.e Signed-off-by: Egon Elbre <egonelbre@gmail.com>
77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package material
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import (
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"image/color"
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"gioui.org/internal/f32color"
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"gioui.org/layout"
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"gioui.org/op"
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"gioui.org/op/paint"
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"gioui.org/text"
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"gioui.org/unit"
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"gioui.org/widget"
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)
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type EditorStyle struct {
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Font text.Font
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TextSize unit.Value
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// Color is the text color.
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Color color.NRGBA
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// Hint contains the text displayed when the editor is empty.
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Hint string
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// HintColor is the color of hint text.
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HintColor color.NRGBA
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Editor *widget.Editor
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shaper text.Shaper
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}
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func Editor(th *Theme, editor *widget.Editor, hint string) EditorStyle {
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return EditorStyle{
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Editor: editor,
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TextSize: th.TextSize,
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Color: th.Color.Text,
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shaper: th.Shaper,
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Hint: hint,
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HintColor: th.Color.Hint,
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}
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}
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func (e EditorStyle) Layout(gtx layout.Context) layout.Dimensions {
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defer op.Push(gtx.Ops).Pop()
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macro := op.Record(gtx.Ops)
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paint.ColorOp{Color: e.HintColor}.Add(gtx.Ops)
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var maxlines int
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if e.Editor.SingleLine {
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maxlines = 1
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}
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tl := widget.Label{Alignment: e.Editor.Alignment, MaxLines: maxlines}
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dims := tl.Layout(gtx, e.shaper, e.Font, e.TextSize, e.Hint)
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call := macro.Stop()
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if w := dims.Size.X; gtx.Constraints.Min.X < w {
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gtx.Constraints.Min.X = w
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}
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if h := dims.Size.Y; gtx.Constraints.Min.Y < h {
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gtx.Constraints.Min.Y = h
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}
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dims = e.Editor.Layout(gtx, e.shaper, e.Font, e.TextSize)
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disabled := gtx.Queue == nil
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if e.Editor.Len() > 0 {
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textColor := e.Color
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if disabled {
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textColor = f32color.MulAlpha(textColor, 150)
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}
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paint.ColorOp{Color: textColor}.Add(gtx.Ops)
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e.Editor.PaintText(gtx)
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} else {
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call.Add(gtx.Ops)
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}
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if !disabled {
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paint.ColorOp{Color: e.Color}.Add(gtx.Ops)
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e.Editor.PaintCaret(gtx)
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}
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return dims
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}
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