74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
package clui
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// RadioGroup is non-interactive invisible object. It manages
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// set of Radio buttons: at a time no more than one radio
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// button from a group can be selected
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type RadioGroup struct {
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items []*Radio
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}
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// CreateRadioGroup creates a new RadioGroup
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func CreateRadioGroup() *RadioGroup {
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c := new(RadioGroup)
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c.items = make([]*Radio, 0)
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return c
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}
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// Selected returns the number of currently selected radio
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// button inside the group or -1 if no button is selected
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func (c *RadioGroup) Selected() int {
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selected := -1
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for id, item := range c.items {
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if item.Selected() {
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selected = id
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break
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}
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}
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return selected
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}
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// SelectItem makes the radio selected. The function returns false
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// if it failed to find the radio in the radio group
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func (c *RadioGroup) SelectItem(r *Radio) bool {
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found := false
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for _, item := range c.items {
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if item == r {
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found = true
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item.SetSelected(true)
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} else {
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item.SetSelected(false)
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}
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}
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return found
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}
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// SetSelected selects the radio by its number. The function
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// returns false if the number is invalid for the radio group
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func (c *RadioGroup) SetSelected(id int) bool {
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found := false
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if id < 0 || id >= len(c.items) {
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return false
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}
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for idx, item := range c.items {
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if idx == id {
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found = true
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item.SetSelected(true)
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} else {
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item.SetSelected(false)
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}
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}
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return found
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}
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// AddItem adds a new radio button to group
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func (c *RadioGroup) AddItem(r *Radio) {
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c.items = append(c.items, r)
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r.SetGroup(c)
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}
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