Add different selection modes to Calendar (Single, Multi, Range)

cmd/calendar_demo/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"time"
 
 	"fyne.io/fyne/v2"
@@ -14,29 +15,63 @@ func main() {
 	a := app.New()
 	w := a.NewWindow("Calendar")
 
-	i := widget.NewLabel("Please Choose a Date")
+	i := widget.NewLabel("OnChanged")
 	i.Alignment = fyne.TextAlignCenter
 	l := widget.NewLabel("")
 	l.Alignment = fyne.TextAlignCenter
-	d := &date{instruction: i, dateChosen: l}
+	ll := widget.NewLabel("OnSelected: ")
+	d := &date{selectedDates: l, dateSelected: ll}
 
 	// Defines which date you would like the calendar to start
 	startingDate := time.Now()
-	calendar := xwidget.NewCalendar(startingDate, d.onSelected)
+	calendar := xwidget.NewCalendarWithMode(startingDate, d.onChanged, xwidget.CalendarSingle)
+	calendar.OnSelected = d.onSelected
 
-	c := container.NewVBox(i, l, calendar)
+	selection := widget.NewRadioGroup([]string{"Single", "Multi", "Range"}, func(s string) {
+		calendar.ClearSelection()
+		switch s {
+		case "Single":
+			calendar.SelectionMode = xwidget.CalendarSingle
+		case "Multi":
+			calendar.SelectionMode = xwidget.CalendarMulti
+		case "Range":
+			calendar.SelectionMode = xwidget.CalendarRange
+		}
+		calendar.Refresh()
+	})
+	selection.Horizontal = true
+	selection.Required = true
+	selection.Selected = "Single"
+
+	scroll := container.NewVScroll(l)
+	scroll.SetMinSize(fyne.NewSize(200, 100))
+
+	c := container.NewVBox(
+		i,
+		scroll,
+		ll,
+		calendar,
+		selection,
+	)
 
 	w.SetContent(c)
 	w.ShowAndRun()
 }
 
 type date struct {
-	instruction *widget.Label
-	dateChosen  *widget.Label
+	selectedDates *widget.Label
+	dateSelected  *widget.Label
 }
 
-func (d *date) onSelected(t time.Time) {
+func (d *date) onChanged(selectedDates []time.Time) {
 	// use time object to set text on label with given format
-	d.instruction.SetText("Date Selected:")
-	d.dateChosen.SetText(t.Format("Mon 02 Jan 2006"))
+	var str string
+	for _, d := range selectedDates {
+		str += fmt.Sprint(d.Format("Mon 02 Jan 2006"), "\n")
+	}
+	d.selectedDates.SetText(str)
+}
+
+func (d *date) onSelected(selectedDate time.Time) {
+	d.dateSelected.SetText("OnSelected: " + selectedDate.Format("Mon 02 Jan 2006"))
 }