nps/gui/fyne_demo/screens/widget.go

package screens

import (
	"fmt"
	"time"

	"fyne.io/fyne"
	"fyne.io/fyne/canvas"
	"fyne.io/fyne/layout"
	"fyne.io/fyne/theme"
	"fyne.io/fyne/widget"
)

func makeButtonTab() fyne.Widget {
	disabled := widget.NewButton("Disabled", func() {})
	disabled.Disable()

	return widget.NewVBox(
		widget.NewLabel("Text label"),
		widget.NewButton("Text button", func() { fmt.Println("tapped text button") }),
		widget.NewButtonWithIcon("With icon", theme.ConfirmIcon(), func() { fmt.Println("tapped icon button") }),
		disabled,
	)
}

func makeInputTab() fyne.Widget {
	entry := widget.NewEntry()
	entry.SetPlaceHolder("Entry")
	entryReadOnly := widget.NewEntry()
	entryReadOnly.SetText("Entry (disabled)")
	entryReadOnly.Disable()

	disabledCheck := widget.NewCheck("Disabled check", func(bool) {})
	disabledCheck.Disable()
	radio := widget.NewRadio([]string{"Radio Item 1", "Radio Item 2"}, func(s string) { fmt.Println("selected", s) })
	radio.Horizontal = true
	disabledRadio := widget.NewRadio([]string{"Disabled radio"}, func(string) {})
	disabledRadio.Disable()

	return widget.NewVBox(
		entry,
		entryReadOnly,
		widget.NewSelect([]string{"Option 1", "Option 2", "Option 3"}, func(s string) { fmt.Println("selected", s) }),
		widget.NewCheck("Check", func(on bool) { fmt.Println("checked", on) }),
		disabledCheck,
		radio,
		disabledRadio,
		widget.NewSlider(0, 100),
	)
}

func makeProgressTab() fyne.Widget {
	progress := widget.NewProgressBar()
	infProgress := widget.NewProgressBarInfinite()

	go func() {
		num := 0.0
		for num < 1.0 {
			time.Sleep(100 * time.Millisecond)
			progress.SetValue(num)
			num += 0.01
		}

		progress.SetValue(1)
	}()

	return widget.NewVBox(
		widget.NewLabel("Percent"), progress,
		widget.NewLabel("Infinite"), infProgress)
}

func makeFormTab() fyne.Widget {
	name := widget.NewEntry()
	name.SetPlaceHolder("John Smith")
	email := widget.NewEntry()
	email.SetPlaceHolder("test@example.com")
	password := widget.NewPasswordEntry()
	password.SetPlaceHolder("Password")
	largeText := widget.NewMultiLineEntry()

	form := &widget.Form{
		OnCancel: func() {
			fmt.Println("Cancelled")
		},
		OnSubmit: func() {
			fmt.Println("Form submitted")
			fmt.Println("Name:", name.Text)
			fmt.Println("Email:", email.Text)
			fmt.Println("Password:", password.Text)
			fmt.Println("Message:", largeText.Text)
		},
	}
	form.Append("Name", name)
	form.Append("Email", email)
	form.Append("Password", password)
	form.Append("Message", largeText)

	return form
}

func makeScrollTab() fyne.CanvasObject {
	logo := canvas.NewImageFromResource(theme.FyneLogo())
	logo.SetMinSize(fyne.NewSize(320, 320))
	list := widget.NewHBox()
	list2 := widget.NewVBox()

	for i := 1; i <= 20; i++ {
		index := i // capture
		list.Append(widget.NewButton(fmt.Sprintf("Button %d", index), func() {
			fmt.Println("Tapped", index)
		}))
		list2.Append(widget.NewButton(fmt.Sprintf("Button %d", index), func() {
			fmt.Println("Tapped", index)
		}))
	}

	scroll := widget.NewScrollContainer(list)
	scroll.Resize(fyne.NewSize(200, 300))

	scroll2 := widget.NewScrollContainer(list2)
	scroll2.Resize(fyne.NewSize(200, 100))

	return fyne.NewContainerWithLayout(layout.NewGridLayout(1), scroll, scroll2)
}

func makeScrollBothTab() fyne.CanvasObject {
	logo := canvas.NewImageFromResource(theme.FyneLogo())
	logo.SetMinSize(fyne.NewSize(800, 800))

	scroll := widget.NewScrollContainer(logo)
	scroll.Resize(fyne.NewSize(400, 400))

	return scroll
}

// WidgetScreen shows a panel containing widget demos
func WidgetScreen() fyne.CanvasObject {
	toolbar := widget.NewToolbar(widget.NewToolbarAction(theme.MailComposeIcon(), func() { fmt.Println("New") }),
		widget.NewToolbarSeparator(),
		widget.NewToolbarSpacer(),
		widget.NewToolbarAction(theme.ContentCutIcon(), func() { fmt.Println("Cut") }),
		widget.NewToolbarAction(theme.ContentCopyIcon(), func() { fmt.Println("Copy") }),
		widget.NewToolbarAction(theme.ContentPasteIcon(), func() { fmt.Println("Paste") }),
	)

	return fyne.NewContainerWithLayout(layout.NewBorderLayout(toolbar, nil, nil, nil),
		toolbar,
		widget.NewTabContainer(
			widget.NewTabItem("Buttons", makeButtonTab()),
			widget.NewTabItem("Input", makeInputTab()),
			widget.NewTabItem("Progress", makeProgressTab()),
			widget.NewTabItem("Form", makeFormTab()),
			widget.NewTabItem("Scroll", makeScrollTab()),
			widget.NewTabItem("Full Scroll", makeScrollBothTab()),
		),
	)
}