/
widget.go
373 lines (318 loc) · 11.4 KB
/
widget.go
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package tutorials
import (
"fmt"
"image/color"
"net/url"
"time"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/canvas"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/data/validation"
"fyne.io/fyne/v2/layout"
"fyne.io/fyne/v2/theme"
"fyne.io/fyne/v2/widget"
)
const (
loremIpsum = `Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque quis consectetur nisi. Suspendisse id interdum felis.
Sed egestas eget tellus eu pharetra. Praesent pulvinar sed massa id placerat. Etiam sem libero, semper vitae consequat ut, volutpat id mi.
Mauris volutpat pellentesque convallis. Curabitur rutrum venenatis orci nec ornare. Maecenas quis pellentesque neque.
Aliquam consectetur dapibus nulla, id maximus odio ultrices ac. Sed luctus at felis sed faucibus. Cras leo augue, congue in velit ut, mattis rhoncus lectus.
Praesent viverra, mauris ut ullamcorper semper, leo urna auctor lectus, vitae vehicula mi leo quis lorem.
Nullam condimentum, massa at tempor feugiat, metus enim lobortis velit, eget suscipit eros ipsum quis tellus. Aenean fermentum diam vel felis dictum semper.
Duis nisl orci, tincidunt ut leo quis, luctus vehicula diam. Sed velit justo, congue id augue eu, euismod dapibus lacus. Proin sit amet imperdiet sapien.
Mauris erat urna, fermentum et quam rhoncus, fringilla consequat ante. Vivamus consectetur molestie odio, ac rutrum erat finibus a.
Suspendisse id maximus felis. Sed mauris odio, mattis eget mi eu, consequat tempus purus.`
)
var (
progress *widget.ProgressBar
fprogress *widget.ProgressBar
infProgress *widget.ProgressBarInfinite
endProgress chan interface{}
)
func makeAccordionTab(_ fyne.Window) fyne.CanvasObject {
link, err := url.Parse("https://fyne.io/")
if err != nil {
fyne.LogError("Could not parse URL", err)
}
ac := widget.NewAccordion(
widget.NewAccordionItem("A", widget.NewHyperlink("One", link)),
widget.NewAccordionItem("B", widget.NewLabel("Two")),
&widget.AccordionItem{
Title: "C",
Detail: widget.NewLabel("Three"),
},
)
ac.Append(widget.NewAccordionItem("D", &widget.Entry{Text: "Four"}))
return ac
}
func makeButtonTab(_ fyne.Window) fyne.CanvasObject {
disabled := widget.NewButton("Disabled", func() {})
disabled.Disable()
shareItem := fyne.NewMenuItem("Share via", nil)
shareItem.ChildMenu = fyne.NewMenu("",
fyne.NewMenuItem("Twitter", func() { fmt.Println("context menu Share->Twitter") }),
fyne.NewMenuItem("Reddit", func() { fmt.Println("context menu Share->Reddit") }),
)
menuLabel := newContextMenuButton("tap me for pop-up menu with submenus", fyne.NewMenu("",
fyne.NewMenuItem("Copy", func() { fmt.Println("context menu copy") }),
shareItem,
))
return container.NewVBox(
widget.NewButton("Button (text only)", func() { fmt.Println("tapped text button") }),
widget.NewButtonWithIcon("Button (text & leading icon)", theme.ConfirmIcon(), func() { fmt.Println("tapped text & leading icon button") }),
&widget.Button{
Alignment: widget.ButtonAlignLeading,
Text: "Button (leading-aligned, text only)",
OnTapped: func() { fmt.Println("tapped leading-aligned, text only button") },
},
&widget.Button{
Alignment: widget.ButtonAlignTrailing,
IconPlacement: widget.ButtonIconTrailingText,
Text: "Button (trailing-aligned, text & trailing icon)",
Icon: theme.ConfirmIcon(),
OnTapped: func() { fmt.Println("tapped trailing-aligned, text & trailing icon button") },
},
disabled,
layout.NewSpacer(),
layout.NewSpacer(),
menuLabel,
layout.NewSpacer(),
)
}
func makeCardTab(_ fyne.Window) fyne.CanvasObject {
card1 := widget.NewCard("Book a table", "Which time suits?",
widget.NewRadioGroup([]string{"6:30pm", "7:00pm", "7:45pm"}, func(string) {}))
card2 := widget.NewCard("With media", "No content, with image", nil)
card2.Image = canvas.NewImageFromResource(theme.FyneLogo())
card3 := widget.NewCard("Title 3", "Another card", widget.NewLabel("Content"))
return container.NewGridWithColumns(2, container.NewVBox(card1, card3),
container.NewVBox(card2))
}
func makeEntryTab(_ fyne.Window) fyne.CanvasObject {
entry := widget.NewEntry()
entry.SetPlaceHolder("Entry")
entryDisabled := widget.NewEntry()
entryDisabled.SetText("Entry (disabled)")
entryDisabled.Disable()
entryValidated := &widget.Entry{Validator: validation.NewRegexp(`\d`, "Must contain a number")}
entryValidated.SetPlaceHolder("Must contain a number")
entryMultiLine := widget.NewMultiLineEntry()
entryMultiLine.SetPlaceHolder("MultiLine Entry")
return container.NewVBox(
entry,
entryDisabled,
entryValidated,
entryMultiLine)
}
func makeTextGrid() *widget.TextGrid {
grid := widget.NewTextGridFromString("TextGrid\n\tContent\nZebra")
grid.SetStyleRange(0, 4, 0, 7,
&widget.CustomTextGridStyle{BGColor: &color.NRGBA{R: 64, G: 64, B: 192, A: 128}})
grid.SetRowStyle(1, &widget.CustomTextGridStyle{BGColor: &color.NRGBA{R: 64, G: 192, B: 64, A: 128}})
white := &widget.CustomTextGridStyle{FGColor: color.White, BGColor: color.Black}
black := &widget.CustomTextGridStyle{FGColor: color.Black, BGColor: color.White}
grid.Rows[2].Cells[0].Style = white
grid.Rows[2].Cells[1].Style = black
grid.Rows[2].Cells[2].Style = white
grid.Rows[2].Cells[3].Style = black
grid.Rows[2].Cells[4].Style = white
grid.ShowLineNumbers = true
grid.ShowWhitespace = true
return grid
}
func makeTextTab(_ fyne.Window) fyne.CanvasObject {
label := widget.NewLabel("Label")
link, err := url.Parse("https://fyne.io/")
if err != nil {
fyne.LogError("Could not parse URL", err)
}
hyperlink := widget.NewHyperlink("Hyperlink", link)
entryLoremIpsum := widget.NewMultiLineEntry()
entryLoremIpsum.SetText(loremIpsum)
label.Alignment = fyne.TextAlignLeading
hyperlink.Alignment = fyne.TextAlignLeading
label.Wrapping = fyne.TextWrapWord
hyperlink.Wrapping = fyne.TextWrapWord
entryLoremIpsum.Wrapping = fyne.TextWrapWord
radioAlign := widget.NewRadioGroup([]string{"Text Alignment Leading", "Text Alignment Center", "Text Alignment Trailing"}, func(s string) {
var align fyne.TextAlign
switch s {
case "Text Alignment Leading":
align = fyne.TextAlignLeading
case "Text Alignment Center":
align = fyne.TextAlignCenter
case "Text Alignment Trailing":
align = fyne.TextAlignTrailing
}
label.Alignment = align
hyperlink.Alignment = align
label.Refresh()
hyperlink.Refresh()
})
radioAlign.SetSelected("Text Alignment Leading")
radioWrap := widget.NewRadioGroup([]string{"Text Wrapping Off", "Text Wrapping Truncate", "Text Wrapping Break", "Text Wrapping Word"}, func(s string) {
var wrap fyne.TextWrap
switch s {
case "Text Wrapping Off":
wrap = fyne.TextWrapOff
case "Text Wrapping Truncate":
wrap = fyne.TextTruncate
case "Text Wrapping Break":
wrap = fyne.TextWrapBreak
case "Text Wrapping Word":
wrap = fyne.TextWrapWord
}
label.Wrapping = wrap
hyperlink.Wrapping = wrap
entryLoremIpsum.Wrapping = wrap
label.Refresh()
hyperlink.Refresh()
entryLoremIpsum.Refresh()
})
radioWrap.SetSelected("Text Wrapping Word")
fixed := container.NewVBox(
container.NewHBox(
radioAlign,
layout.NewSpacer(),
radioWrap,
),
label,
hyperlink,
)
grid := makeTextGrid()
return fyne.NewContainerWithLayout(layout.NewBorderLayout(fixed, grid, nil, nil),
fixed, entryLoremIpsum, grid)
}
func makeInputTab(_ fyne.Window) fyne.CanvasObject {
selectEntry := widget.NewSelectEntry([]string{"Option A", "Option B", "Option C"})
selectEntry.PlaceHolder = "Type or select"
disabledCheck := widget.NewCheck("Disabled check", func(bool) {})
disabledCheck.Disable()
radio := widget.NewRadioGroup([]string{"Radio Item 1", "Radio Item 2"}, func(s string) { fmt.Println("selected", s) })
radio.Horizontal = true
disabledRadio := widget.NewRadioGroup([]string{"Disabled radio"}, func(string) {})
disabledRadio.Disable()
return container.NewVBox(
widget.NewSelect([]string{"Option 1", "Option 2", "Option 3"}, func(s string) { fmt.Println("selected", s) }),
selectEntry,
widget.NewCheck("Check", func(on bool) { fmt.Println("checked", on) }),
disabledCheck,
radio,
disabledRadio,
widget.NewSlider(0, 100),
)
}
func makeProgressTab(_ fyne.Window) fyne.CanvasObject {
stopProgress()
progress = widget.NewProgressBar()
fprogress = widget.NewProgressBar()
fprogress.TextFormatter = func() string {
return fmt.Sprintf("%.2f out of %.2f", fprogress.Value, fprogress.Max)
}
infProgress = widget.NewProgressBarInfinite()
endProgress = make(chan interface{}, 1)
startProgress()
return container.NewVBox(
widget.NewLabel("Percent"), progress,
widget.NewLabel("Formatted"), fprogress,
widget.NewLabel("Infinite"), infProgress)
}
func makeFormTab(_ fyne.Window) fyne.CanvasObject {
name := widget.NewEntry()
name.SetPlaceHolder("John Smith")
email := widget.NewEntry()
email.SetPlaceHolder("test@example.com")
email.Validator = validation.NewRegexp(`\w{1,}@\w{1,}\.\w{1,4}`, "not a valid email")
password := widget.NewPasswordEntry()
password.SetPlaceHolder("Password")
disabled := widget.NewRadioGroup([]string{"Option 1", "Option 2"}, func(string) {})
disabled.Horizontal = true
disabled.Disable()
largeText := widget.NewMultiLineEntry()
form := &widget.Form{
Items: []*widget.FormItem{
{Text: "Name", Widget: name, HintText: "Your full name"},
{Text: "Email", Widget: email, HintText: "A valid email address"},
},
OnCancel: func() {
fmt.Println("Cancelled")
},
OnSubmit: func() {
fmt.Println("Form submitted")
fyne.CurrentApp().SendNotification(&fyne.Notification{
Title: "Form for: " + name.Text,
Content: largeText.Text,
})
},
}
form.Append("Password", password)
form.Append("Disabled", disabled)
form.Append("Message", largeText)
return form
}
func makeToolbarTab(_ fyne.Window) fyne.CanvasObject {
t := 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 container.NewBorder(t, nil, nil, nil)
}
func startProgress() {
progress.SetValue(0)
fprogress.SetValue(0)
select { // ignore stale end message
case <-endProgress:
default:
}
go func() {
end := endProgress
num := 0.0
for num < 1.0 {
time.Sleep(16 * time.Millisecond)
select {
case <-end:
return
default:
}
progress.SetValue(num)
fprogress.SetValue(num)
num += 0.002
}
progress.SetValue(1)
fprogress.SetValue(1)
// TODO make sure this resets when we hide etc...
stopProgress()
}()
infProgress.Start()
}
func stopProgress() {
if !infProgress.Running() {
return
}
infProgress.Stop()
endProgress <- struct{}{}
}
// widgetScreen shows a panel containing widget demos
func widgetScreen(_ fyne.Window) fyne.CanvasObject {
content := container.NewVBox(
widget.NewLabel("Labels"),
widget.NewButtonWithIcon("Icons", theme.HomeIcon(), func() {}),
widget.NewSlider(0, 1))
return container.NewCenter(content)
}
type contextMenuButton struct {
widget.Button
menu *fyne.Menu
}
func (b *contextMenuButton) Tapped(e *fyne.PointEvent) {
widget.ShowPopUpMenuAtPosition(b.menu, fyne.CurrentApp().Driver().CanvasForObject(b), e.AbsolutePosition)
}
func newContextMenuButton(label string, menu *fyne.Menu) *contextMenuButton {
b := &contextMenuButton{menu: menu}
b.Text = label
b.ExtendBaseWidget(b)
return b
}