Initial commit

app/fyne_demo/tutorials/advanced.go

@@ -0,0 +1,85 @@
+package tutorials
+
+import (
+	"strconv"
+	"time"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/driver/desktop"
+	"fyne.io/fyne/v2/widget"
+)
+
+func scaleString(c fyne.Canvas) string {
+	return strconv.FormatFloat(float64(c.Scale()), 'f', 2, 32)
+}
+
+func texScaleString(c fyne.Canvas) string {
+	pixels, _ := c.PixelCoordinateForPosition(fyne.NewPos(1, 1))
+	texScale := float32(pixels) / c.Scale()
+	return strconv.FormatFloat(float64(texScale), 'f', 2, 32)
+}
+
+func prependTo(g *fyne.Container, s string) {
+	g.Objects = append([]fyne.CanvasObject{widget.NewLabel(s)}, g.Objects...)
+	g.Refresh()
+}
+
+func setScaleText(scale, tex *widget.Label, win fyne.Window) {
+	for scale.Visible() {
+		scale.SetText(scaleString(win.Canvas()))
+		tex.SetText(texScaleString(win.Canvas()))
+
+		time.Sleep(time.Second)
+	}
+}
+
+// advancedScreen loads a panel that shows details and settings that are a bit
+// more detailed than normally needed.
+func advancedScreen(win fyne.Window) fyne.CanvasObject {
+	scale := widget.NewLabel("")
+	tex := widget.NewLabel("")
+
+	screen := widget.NewCard("Screen info", "", widget.NewForm(
+		&widget.FormItem{Text: "Scale", Widget: scale},
+		&widget.FormItem{Text: "Texture Scale", Widget: tex},
+	))
+
+	go setScaleText(scale, tex, win)
+
+	label := widget.NewLabel("Just type...")
+	generic := container.NewVBox()
+	desk := container.NewVBox()
+
+	genericCard := widget.NewCard("", "Generic", container.NewVScroll(generic))
+	deskCard := widget.NewCard("", "Desktop", container.NewVScroll(desk))
+
+	win.Canvas().SetOnTypedRune(func(r rune) {
+		prependTo(generic, "Rune: "+string(r))
+	})
+	win.Canvas().SetOnTypedKey(func(ev *fyne.KeyEvent) {
+		prependTo(generic, "Key : "+string(ev.Name))
+	})
+	if deskCanvas, ok := win.Canvas().(desktop.Canvas); ok {
+		deskCanvas.SetOnKeyDown(func(ev *fyne.KeyEvent) {
+			prependTo(desk, "KeyDown: "+string(ev.Name))
+		})
+		deskCanvas.SetOnKeyUp(func(ev *fyne.KeyEvent) {
+			prependTo(desk, "KeyUp  : "+string(ev.Name))
+		})
+	}
+
+	return container.NewHBox(
+		container.NewVBox(screen,
+			widget.NewButton("Custom Theme", func() {
+				fyne.CurrentApp().Settings().SetTheme(newCustomTheme())
+			}),
+			widget.NewButton("Fullscreen", func() {
+				win.SetFullScreen(!win.FullScreen())
+			}),
+		),
+		container.NewBorder(label, nil, nil, nil,
+			container.NewGridWithColumns(2, genericCard, deskCard),
+		),
+	)
+}