/
entry_validation.go
107 lines (87 loc) · 2.41 KB
/
entry_validation.go
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package widget
import (
"fyne.io/fyne"
"fyne.io/fyne/canvas"
"fyne.io/fyne/internal/widget"
"fyne.io/fyne/theme"
)
var _ fyne.Validatable = (*Entry)(nil)
// Validate validates the current text in the widget
func (e *Entry) Validate() error {
if e.Validator == nil {
return nil
}
err := e.Validator(e.Text)
e.SetValidationError(err)
return err
}
// SetOnValidationChanged is intended for parent widgets or containers to hook into the validation.
// The function might be overwritten by a parent that cares about child validation (e.g. widget.Form).
func (e *Entry) SetOnValidationChanged(callback func(error)) {
if callback != nil {
e.onValidationChanged = callback
}
}
// SetValidationError manually updates the validation status until the next input change
func (e *Entry) SetValidationError(err error) {
if e.Validator == nil {
return
}
if err != e.validationError && e.onValidationChanged != nil {
e.onValidationChanged(err)
}
e.validationError = err
e.Refresh()
}
var _ fyne.Widget = (*validationStatus)(nil)
type validationStatus struct {
BaseWidget
entry *Entry
}
func newValidationStatus(e *Entry) *validationStatus {
rs := &validationStatus{
entry: e,
}
rs.ExtendBaseWidget(rs)
return rs
}
func (r *validationStatus) CreateRenderer() fyne.WidgetRenderer {
icon := &canvas.Image{}
icon.Hide()
return &validationStatusRenderer{
BaseRenderer: widget.NewBaseRenderer([]fyne.CanvasObject{icon}),
icon: icon,
entry: r.entry,
}
}
var _ fyne.WidgetRenderer = (*validationStatusRenderer)(nil)
type validationStatusRenderer struct {
widget.BaseRenderer
entry *Entry
icon *canvas.Image
}
func (r *validationStatusRenderer) Layout(size fyne.Size) {
r.icon.Resize(fyne.NewSize(theme.IconInlineSize(), theme.IconInlineSize()))
r.icon.Move(fyne.NewPos((size.Width-theme.IconInlineSize())/2, (size.Height-theme.IconInlineSize())/2))
}
func (r *validationStatusRenderer) MinSize() fyne.Size {
return fyne.NewSize(theme.IconInlineSize(), theme.IconInlineSize())
}
func (r *validationStatusRenderer) Refresh() {
r.entry.propertyLock.RLock()
defer r.entry.propertyLock.RUnlock()
if r.entry.Text == "" {
r.icon.Hide()
return
}
if r.entry.validationError == nil {
r.icon.Resource = theme.ConfirmIcon()
r.icon.Show()
} else if !r.entry.focused {
r.icon.Resource = theme.NewErrorThemedResource(theme.ErrorIcon())
r.icon.Show()
} else {
r.icon.Hide()
}
canvas.Refresh(r.icon)
}