mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 07:35:40 +00:00
Larry Clapp
95f63c66b6
Note that you should use different Themes, with different Shapers, for different top-level windows, and explain why. Signed-off-by: Larry Clapp <larry@theclapp.org>
96 lines
2.3 KiB
Go
96 lines
2.3 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
|
|
|
|
package material
|
|
|
|
import (
|
|
"image/color"
|
|
|
|
"golang.org/x/exp/shiny/materialdesign/icons"
|
|
|
|
"gioui.org/font"
|
|
"gioui.org/text"
|
|
"gioui.org/unit"
|
|
"gioui.org/widget"
|
|
)
|
|
|
|
// Palette contains the minimal set of colors that a widget may need to
|
|
// draw itself.
|
|
type Palette struct {
|
|
// Bg is the background color atop which content is currently being
|
|
// drawn.
|
|
Bg color.NRGBA
|
|
|
|
// Fg is a color suitable for drawing on top of Bg.
|
|
Fg color.NRGBA
|
|
|
|
// ContrastBg is a color used to draw attention to active,
|
|
// important, interactive widgets such as buttons.
|
|
ContrastBg color.NRGBA
|
|
|
|
// ContrastFg is a color suitable for content drawn on top of
|
|
// ContrastBg.
|
|
ContrastFg color.NRGBA
|
|
}
|
|
|
|
// Theme holds the general theme of an app or window. Different top-level
|
|
// windows should have different instances of Theme (with different Shapers;
|
|
// see the godoc for [text.Shaper]), though their other fields can be equal.
|
|
type Theme struct {
|
|
Shaper *text.Shaper
|
|
Palette
|
|
TextSize unit.Sp
|
|
Icon struct {
|
|
CheckBoxChecked *widget.Icon
|
|
CheckBoxUnchecked *widget.Icon
|
|
RadioChecked *widget.Icon
|
|
RadioUnchecked *widget.Icon
|
|
}
|
|
// Face selects the default typeface for text.
|
|
Face font.Typeface
|
|
|
|
// FingerSize is the minimum touch target size.
|
|
FingerSize unit.Dp
|
|
}
|
|
|
|
// NewTheme constructs a theme (and underlying text shaper).
|
|
func NewTheme() *Theme {
|
|
t := &Theme{Shaper: &text.Shaper{}}
|
|
t.Palette = Palette{
|
|
Fg: rgb(0x000000),
|
|
Bg: rgb(0xffffff),
|
|
ContrastBg: rgb(0x3f51b5),
|
|
ContrastFg: rgb(0xffffff),
|
|
}
|
|
t.TextSize = 16
|
|
|
|
t.Icon.CheckBoxChecked = mustIcon(widget.NewIcon(icons.ToggleCheckBox))
|
|
t.Icon.CheckBoxUnchecked = mustIcon(widget.NewIcon(icons.ToggleCheckBoxOutlineBlank))
|
|
t.Icon.RadioChecked = mustIcon(widget.NewIcon(icons.ToggleRadioButtonChecked))
|
|
t.Icon.RadioUnchecked = mustIcon(widget.NewIcon(icons.ToggleRadioButtonUnchecked))
|
|
|
|
// 38dp is on the lower end of possible finger size.
|
|
t.FingerSize = 38
|
|
|
|
return t
|
|
}
|
|
|
|
func (t Theme) WithPalette(p Palette) Theme {
|
|
t.Palette = p
|
|
return t
|
|
}
|
|
|
|
func mustIcon(ic *widget.Icon, err error) *widget.Icon {
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return ic
|
|
}
|
|
|
|
func rgb(c uint32) color.NRGBA {
|
|
return argb(0xff000000 | c)
|
|
}
|
|
|
|
func argb(c uint32) color.NRGBA {
|
|
return color.NRGBA{A: uint8(c >> 24), R: uint8(c >> 16), G: uint8(c >> 8), B: uint8(c)}
|
|
}
|