79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
package objects
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import "git.tebibyte.media/tomo/tomo"
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import "git.tebibyte.media/tomo/tomo/input"
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import "git.tebibyte.media/tomo/tomo/event"
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// Checkbox is a control that can be toggled.
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type Checkbox struct {
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tomo.Box
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value bool
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on struct {
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valueChange event.FuncBroadcaster
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}
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}
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// NewCheckbox creates a new checkbox with the specified value.
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func NewCheckbox (value bool) *Checkbox {
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box := &Checkbox {
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Box: tomo.NewBox(),
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}
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box.SetRole(tomo.R("objects", "Checkbox"))
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box.SetValue(value)
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box.OnButtonDown(box.handleButtonDown)
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box.OnButtonUp(box.handleButtonUp)
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box.OnKeyDown(box.handleKeyDown)
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box.OnKeyUp(box.handleKeyUp)
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box.SetFocusable(true)
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return box
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}
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// Value returns the value of the checkbox.
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func (this *Checkbox) Value () bool {
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return this.value
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}
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// SetValue sets the value of the checkbox.
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func (this *Checkbox) SetValue (value bool) {
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this.value = value
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// the theme shall decide what checked and unchecked states look like
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this.SetTag("checked", value)
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this.SetTag("unchecked", !value)
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}
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// Toggle toggles the value of the checkbox between true and false.
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func (this *Checkbox) Toggle () {
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this.SetValue(!this.Value())
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}
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// OnValueChange specifies a function to be called when the user checks or
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// unchecks the checkbox.
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func (this *Checkbox) OnValueChange (callback func ()) event.Cookie {
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return this.on.valueChange.Connect(callback)
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}
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func (this *Checkbox) handleKeyDown (key input.Key, numberPad bool) bool {
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if key != input.KeyEnter && key != input.Key(' ') { return false }
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this.Toggle()
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return true
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}
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func (this *Checkbox) handleKeyUp (key input.Key, numberPad bool) bool {
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if key != input.KeyEnter && key != input.Key(' ') { return false}
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return true
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}
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func (this *Checkbox) handleButtonDown (button input.Button) bool {
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if button != input.ButtonLeft { return false }
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return true
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}
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func (this *Checkbox) handleButtonUp (button input.Button) bool {
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if button != input.ButtonLeft { return false }
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if this.Window().MousePosition().In(this.Bounds()) {
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this.Toggle()
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}
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return true
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}
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