46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package widgets
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import (
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"strings"
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"fyne.io/fyne/v2"
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"fyne.io/fyne/v2/theme"
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"fyne.io/fyne/v2/widget"
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)
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// A widget.Entry that allows restrictions on the text
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// that can be typed into it, based on a charAllowed callback.
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type TextRestrictedEntry struct {
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widget.Entry
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charAllowed CharAllowedFunc
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minWidth float32
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}
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type CharAllowedFunc func(curText string, selectedText string, r rune) bool
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func NewTextRestrictedEntry(charAllowed CharAllowedFunc) *TextRestrictedEntry {
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e := &TextRestrictedEntry{charAllowed: charAllowed}
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e.ExtendBaseWidget(e)
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return e
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}
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func (e *TextRestrictedEntry) TypedRune(r rune) {
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if e.charAllowed == nil || e.charAllowed(e.Text, e.SelectedText(), r) {
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e.Entry.TypedRune(r)
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}
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}
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func (e *TextRestrictedEntry) SetMinCharWidth(numChars int) {
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e.minWidth = theme.Padding()*2 + fyne.MeasureText(strings.Repeat("W", numChars),
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fyne.CurrentApp().Settings().Theme().Size(theme.SizeNameText), e.TextStyle).Width
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}
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func (e *TextRestrictedEntry) MinSize() fyne.Size {
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if e.minWidth < 0.001 {
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return e.Entry.MinSize()
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}
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return fyne.NewSize(e.minWidth, e.Entry.MinSize().Height)
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}
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