objects/numberinput.go

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package objects
import "math"
import "strconv"
import "git.tebibyte.media/tomo/tomo"
import "git.tebibyte.media/tomo/tomo/text"
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import "git.tebibyte.media/tomo/tomo/input"
import "git.tebibyte.media/tomo/tomo/event"
import "git.tebibyte.media/tomo/objects/layouts"
var _ tomo.Object = new(NumberInput)
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// NumberInput is an editable text box which accepts only numbers, and has
// controls to increment and decrement its value.
type NumberInput struct {
box tomo.ContainerBox
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input *TextInput
increment *Button
decrement *Button
on struct {
valueChange event.FuncBroadcaster
confirm event.FuncBroadcaster
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}
}
// NewNumberInput creates a new number input with the specified value.
func NewNumberInput (value float64) *NumberInput {
numberInput := &NumberInput {
box: tomo.NewContainerBox(),
input: NewTextInput(""),
increment: NewButton(""),
decrement: NewButton(""),
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}
numberInput.box.SetRole(tomo.R("objects", "NumberInput"))
numberInput.box.Add(numberInput.input)
numberInput.box.Add(numberInput.decrement)
numberInput.box.Add(numberInput.increment)
numberInput.box.SetAttr(tomo.ALayout(layouts.Row { true, false, false }))
numberInput.increment.SetIcon(tomo.IconValueIncrement)
numberInput.decrement.SetIcon(tomo.IconValueDecrement)
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numberInput.SetValue(value)
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numberInput.box.OnScroll(numberInput.handleScroll)
numberInput.box.OnKeyDown(numberInput.handleKeyDown)
numberInput.box.OnKeyUp(numberInput.handleKeyUp)
numberInput.input.OnConfirm(numberInput.handleConfirm)
numberInput.input.OnValueChange(numberInput.on.valueChange.Broadcast)
numberInput.increment.OnClick(func () { numberInput.shift( 1) })
numberInput.decrement.OnClick(func () { numberInput.shift(-1) })
return numberInput
}
// GetBox returns the underlying box.
func (this *NumberInput) GetBox () tomo.Box {
return this.box
}
// SetFocused sets whether or not this number input has keyboard focus. If set
// to true, this method will steal focus away from whichever object currently
// has focus.
func (this *NumberInput) SetFocused (focused bool) {
this.input.SetFocused(focused)
}
// Select sets the text cursor or selection.
func (this *NumberInput) Select (dot text.Dot) {
this.input.Select(dot)
}
// Dot returns the text cursor or selection.
func (this *NumberInput) Dot () text.Dot {
return this.input.Dot()
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}
// Value returns the value of the input.
func (this *NumberInput) Value () float64 {
value, _ := strconv.ParseFloat(this.input.Value(), 64)
return value
}
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// SetValue sets the value of the input.
func (this *NumberInput) SetValue (value float64) {
this.input.SetValue(strconv.FormatFloat(value, 'g', -1, 64))
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}
// OnValueChange specifies a function to be called when the user edits the input
// value.
func (this *NumberInput) OnValueChange (callback func ()) event.Cookie {
return this.on.valueChange.Connect(callback)
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}
// OnConfirm specifies a function to be called when the user presses enter within
// the number input.
func (this *NumberInput) OnConfirm (callback func ()) event.Cookie {
return this.on.confirm.Connect(callback)
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}
func (this *NumberInput) shift (by int) {
this.SetValue(this.Value() + float64(by))
this.on.valueChange.Broadcast()
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}
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func (this *NumberInput) handleKeyDown (key input.Key, numpad bool) bool {
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switch key {
case input.KeyUp:
this.shift(1)
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return true
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case input.KeyDown:
this.shift(-1)
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return true
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}
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return false
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}
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func (this *NumberInput) handleKeyUp (key input.Key, numpad bool) bool {
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switch key {
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case input.KeyUp: return true
case input.KeyDown: return true
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}
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return false
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}
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func (this *NumberInput) handleScroll (x, y float64) bool {
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if x == 0 {
this.shift(-int(math.Round(y)))
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return true
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}
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return false
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}
func (this *NumberInput) handleConfirm () {
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this.SetValue(this.Value())
this.on.confirm.Broadcast()
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}