forked from joejulian/gio
Chris Waldon
acab582487
This commit introduces the material.Theme.Face field, which will automatically populate the Font.Typeface in every text widget created using a constructor function in package material. Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>
93 lines
2.1 KiB
Go
93 lines
2.1 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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"golang.org/x/exp/shiny/materialdesign/icons"
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"gioui.org/font"
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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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// Palette contains the minimal set of colors that a widget may need to
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// draw itself.
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type Palette struct {
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// Bg is the background color atop which content is currently being
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// drawn.
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Bg color.NRGBA
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// Fg is a color suitable for drawing on top of Bg.
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Fg color.NRGBA
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// ContrastBg is a color used to draw attention to active,
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// important, interactive widgets such as buttons.
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ContrastBg color.NRGBA
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// ContrastFg is a color suitable for content drawn on top of
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// ContrastBg.
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ContrastFg color.NRGBA
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}
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type Theme struct {
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Shaper *text.Shaper
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Palette
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TextSize unit.Sp
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Icon struct {
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CheckBoxChecked *widget.Icon
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CheckBoxUnchecked *widget.Icon
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RadioChecked *widget.Icon
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RadioUnchecked *widget.Icon
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}
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// Face selects the default typeface for text.
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Face font.Typeface
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// FingerSize is the minimum touch target size.
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FingerSize unit.Dp
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}
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// NewTheme constructs a theme (and underlying text shaper).
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func NewTheme() *Theme {
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t := &Theme{Shaper: &text.Shaper{}}
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t.Palette = Palette{
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Fg: rgb(0x000000),
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Bg: rgb(0xffffff),
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ContrastBg: rgb(0x3f51b5),
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ContrastFg: rgb(0xffffff),
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}
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t.TextSize = 16
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t.Icon.CheckBoxChecked = mustIcon(widget.NewIcon(icons.ToggleCheckBox))
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t.Icon.CheckBoxUnchecked = mustIcon(widget.NewIcon(icons.ToggleCheckBoxOutlineBlank))
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t.Icon.RadioChecked = mustIcon(widget.NewIcon(icons.ToggleRadioButtonChecked))
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t.Icon.RadioUnchecked = mustIcon(widget.NewIcon(icons.ToggleRadioButtonUnchecked))
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// 38dp is on the lower end of possible finger size.
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t.FingerSize = 38
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return t
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}
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func (t Theme) WithPalette(p Palette) Theme {
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t.Palette = p
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return t
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}
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func mustIcon(ic *widget.Icon, err error) *widget.Icon {
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if err != nil {
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panic(err)
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}
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return ic
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}
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func rgb(c uint32) color.NRGBA {
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return argb(0xff000000 | c)
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}
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func argb(c uint32) color.NRGBA {
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return color.NRGBA{A: uint8(c >> 24), R: uint8(c >> 16), G: uint8(c >> 8), B: uint8(c)}
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}
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