move search entry to its own file

ui/widgets/searchentry.go

@@ -0,0 +1,63 @@
+package widgets
+
+import (
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
+)
+
+type SearchEntry struct {
+	widget.Entry
+	height        float32
+	OnTextChanged func(string)
+}
+
+func NewSearchEntry() *SearchEntry {
+	sf := &SearchEntry{}
+	sf.ExtendBaseWidget(sf)
+	// this is a bit hacky
+	sf.height = widget.NewEntry().MinSize().Height
+	sf.PlaceHolder = "Search"
+	c := NewClearTextButton()
+	c.OnTapped = func() {
+		sf.SetText("")
+	}
+	sf.ActionItem = c
+	sf.OnChanged = func(s string) {
+		if s == "" {
+			c.Resource = theme.SearchIcon()
+		} else {
+			c.Resource = theme.ContentClearIcon()
+		}
+		c.Refresh()
+		if sf.OnTextChanged != nil {
+			sf.OnTextChanged(s)
+		}
+	}
+	return sf
+}
+
+func (s *SearchEntry) MinSize() fyne.Size {
+	return fyne.NewSize(200, s.height)
+}
+
+var _ fyne.Tappable = (*clearTextButton)(nil)
+
+type clearTextButton struct {
+	widget.Icon
+
+	OnTapped func()
+}
+
+func NewClearTextButton() *clearTextButton {
+	c := &clearTextButton{}
+	c.ExtendBaseWidget(c)
+	c.Resource = theme.SearchIcon()
+	return c
+}
+
+func (c *clearTextButton) Tapped(*fyne.PointEvent) {
+	if c.OnTapped != nil {
+		c.OnTapped()
+	}
+}