73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
package widgets
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import (
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"github.com/dweymouth/supersonic/ui/layouts"
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"fyne.io/fyne/v2"
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"fyne.io/fyne/v2/container"
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"fyne.io/fyne/v2/widget"
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)
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// Lays out multiple buttons horizontally with no padding,
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// and uses button.Importance to highlight exactly one which is "active".
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// Similar to a segmented control in other UI toolkits.
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type ToggleButtonGroup struct {
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widget.BaseWidget
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buttonContainer *fyne.Container
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activeBtnIdx int
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}
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func NewToggleButtonGroup(activatedBtnIdx int, buttons ...*widget.Button) *ToggleButtonGroup {
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t := &ToggleButtonGroup{}
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t.ExtendBaseWidget(t)
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t.buttonContainer = container.New(&layouts.HboxCustomPadding{DisableThemePad: true})
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for i, b := range buttons {
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b.Importance = widget.MediumImportance
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t.buttonContainer.Add(b)
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prevOnTapped := b.OnTapped
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b.OnTapped = func(i int) func() {
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return func() {
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if t.onTapped(i) && prevOnTapped != nil {
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prevOnTapped()
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}
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}
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}(i)
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}
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if activatedBtnIdx >= 0 && activatedBtnIdx <= len(buttons) {
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buttons[activatedBtnIdx].Importance = widget.HighImportance
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}
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return t
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}
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func (t *ToggleButtonGroup) ActivatedButtonIndex() int {
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return t.activeBtnIdx
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}
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func (t *ToggleButtonGroup) SetActivatedButton(idx int) {
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changed := t.activeBtnIdx != idx
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t.activeBtnIdx = idx
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for i, b := range t.buttonContainer.Objects {
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if i == idx {
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b.(*widget.Button).Importance = widget.HighImportance
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} else {
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b.(*widget.Button).Importance = widget.MediumImportance
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}
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}
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if changed {
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t.Refresh()
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}
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}
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func (t *ToggleButtonGroup) onTapped(btnIdx int) bool {
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changed := t.activeBtnIdx != btnIdx
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t.SetActivatedButton(btnIdx)
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return changed
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}
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func (t *ToggleButtonGroup) CreateRenderer() fyne.WidgetRenderer {
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return widget.NewSimpleRenderer(t.buttonContainer)
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}
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