113 lines
2.5 KiB
Go
113 lines
2.5 KiB
Go
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package widget
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import (
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"errors"
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"fyne.io/fyne/v2"
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"fyne.io/fyne/v2/canvas"
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"fyne.io/fyne/v2/theme"
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)
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var _ fyne.Validatable = (*Entry)(nil)
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// Validate validates the current text in the widget
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func (e *Entry) Validate() error {
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if e.Validator == nil {
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return nil
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}
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err := e.Validator(e.Text)
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e.SetValidationError(err)
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return err
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}
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// SetOnValidationChanged is intended for parent widgets or containers to hook into the validation.
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// The function might be overwritten by a parent that cares about child validation (e.g. widget.Form).
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func (e *Entry) SetOnValidationChanged(callback func(error)) {
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e.onValidationChanged = callback
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}
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// SetValidationError manually updates the validation status until the next input change
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func (e *Entry) SetValidationError(err error) {
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if e.Validator == nil {
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return
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}
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if err == nil && e.validationError == nil {
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return
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}
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if !errors.Is(err, e.validationError) {
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e.validationError = err
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if e.onValidationChanged != nil {
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e.onValidationChanged(err)
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}
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e.Refresh()
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}
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}
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var _ fyne.Widget = (*validationStatus)(nil)
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type validationStatus struct {
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BaseWidget
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entry *Entry
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}
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func newValidationStatus(e *Entry) *validationStatus {
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rs := &validationStatus{
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entry: e,
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}
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rs.ExtendBaseWidget(rs)
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return rs
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}
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func (r *validationStatus) CreateRenderer() fyne.WidgetRenderer {
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icon := &canvas.Image{}
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icon.Hide()
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return &validationStatusRenderer{
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WidgetRenderer: NewSimpleRenderer(icon),
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icon: icon,
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entry: r.entry,
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}
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}
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var _ fyne.WidgetRenderer = (*validationStatusRenderer)(nil)
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type validationStatusRenderer struct {
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fyne.WidgetRenderer
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entry *Entry
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icon *canvas.Image
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}
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func (r *validationStatusRenderer) Layout(size fyne.Size) {
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r.icon.Resize(fyne.NewSize(theme.IconInlineSize(), theme.IconInlineSize()))
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r.icon.Move(fyne.NewPos((size.Width-theme.IconInlineSize())/2, (size.Height-theme.IconInlineSize())/2))
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}
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func (r *validationStatusRenderer) MinSize() fyne.Size {
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return fyne.NewSize(theme.IconInlineSize(), theme.IconInlineSize())
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}
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func (r *validationStatusRenderer) Refresh() {
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r.entry.propertyLock.RLock()
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defer r.entry.propertyLock.RUnlock()
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if r.entry.disabled {
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r.icon.Hide()
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return
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}
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if r.entry.validationError == nil && r.entry.Text != "" {
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r.icon.Resource = theme.ConfirmIcon()
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r.icon.Show()
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} else if r.entry.validationError != nil && !r.entry.focused && r.entry.dirty {
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r.icon.Resource = theme.NewErrorThemedResource(theme.ErrorIcon())
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r.icon.Show()
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} else {
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r.icon.Hide()
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}
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r.icon.Refresh()
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}
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