Files
gio/widget/material/radiobutton.go
T
Elias Naur 2451750782 widget/material: move widget state object from Layout methods to constructors
Instead of, say,

	var th *material.Theme
	var btn *widget.Clickable

	material.Button(th, "Click me").Layout(gtx, btn)

move the widget state objects to the constructor:

	material.Button(th, btn, "Click me").Layout(gtx)

The advatage is that several widgets can now be used without
wrapping them in function literals. For example,

	layout.Inset{}.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
		material.Button(th, "Click me").Layout(gtx, btn)
	})

collapses to just

	layout.Inset{}.Layout(gtx, material.Button(th, btn, "Click me").Layout)

Signed-off-by: Elias Naur <mail@eliasnaur.com>
2020-05-23 22:28:49 +02:00

44 lines
1.0 KiB
Go

// SPDX-License-Identifier: Unlicense OR MIT
package material
import (
"gioui.org/layout"
"gioui.org/unit"
"gioui.org/widget"
)
type RadioButtonStyle struct {
checkable
Key string
Group *widget.Enum
}
// RadioButton returns a RadioButton with a label. The key specifies
// the value for the Enum.
func RadioButton(th *Theme, group *widget.Enum, key, label string) RadioButtonStyle {
return RadioButtonStyle{
Group: group,
checkable: checkable{
Label: label,
Color: th.Color.Text,
IconColor: th.Color.Primary,
TextSize: th.TextSize.Scale(14.0 / 16.0),
Size: unit.Dp(26),
shaper: th.Shaper,
checkedStateIcon: th.radioCheckedIcon,
uncheckedStateIcon: th.radioUncheckedIcon,
},
Key: key,
}
}
// Layout updates enum and displays the radio button.
func (r RadioButtonStyle) Layout(gtx layout.Context) layout.Dimensions {
r.Group.Update(gtx)
dims := r.layout(gtx, r.Group.Value == r.Key)
r.Group.Layout(gtx, r.Key)
return dims
}