Initial commit

app/fyne_demo/tutorials/container.go

@@ -0,0 +1,154 @@
+package tutorials
+
+import (
+	"fmt"
+	"image/color"
+	"strconv"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
+)
+
+// containerScreen loads a tab panel for containers
+func containerScreen(_ fyne.Window) fyne.CanvasObject {
+	content := container.NewBorder(
+		widget.NewLabelWithStyle("Top", fyne.TextAlignCenter, fyne.TextStyle{}),
+		widget.NewLabelWithStyle("Bottom", fyne.TextAlignCenter, fyne.TextStyle{}),
+		widget.NewLabel("Left"),
+		widget.NewLabel("Right"),
+		widget.NewLabel("Border Container"))
+	return container.NewCenter(content)
+}
+
+func makeAppTabsTab(_ fyne.Window) fyne.CanvasObject {
+	tabs := container.NewAppTabs(
+		container.NewTabItem("Tab 1", widget.NewLabel("Content of tab 1")),
+		container.NewTabItem("Tab 2 bigger", widget.NewLabel("Content of tab 2")),
+		container.NewTabItem("Tab 3", widget.NewLabel("Content of tab 3")),
+	)
+	for i := 4; i <= 12; i++ {
+		tabs.Append(container.NewTabItem(fmt.Sprintf("Tab %d", i), widget.NewLabel(fmt.Sprintf("Content of tab %d", i))))
+	}
+	locations := makeTabLocationSelect(tabs.SetTabLocation)
+	return container.NewBorder(locations, nil, nil, nil, tabs)
+}
+
+func makeBorderLayout(_ fyne.Window) fyne.CanvasObject {
+	top := makeCell()
+	bottom := makeCell()
+	left := makeCell()
+	right := makeCell()
+	middle := widget.NewLabelWithStyle("BorderLayout", fyne.TextAlignCenter, fyne.TextStyle{})
+
+	return container.NewBorder(top, bottom, left, right, middle)
+}
+
+func makeBoxLayout(_ fyne.Window) fyne.CanvasObject {
+	top := makeCell()
+	bottom := makeCell()
+	middle := widget.NewLabel("BoxLayout")
+	center := makeCell()
+	right := makeCell()
+
+	col := container.NewVBox(top, middle, bottom)
+
+	return container.NewHBox(col, center, right)
+}
+
+func makeButtonList(count int) []fyne.CanvasObject {
+	var items []fyne.CanvasObject
+	for i := 1; i <= count; i++ {
+		index := i // capture
+		items = append(items, widget.NewButton("Button "+strconv.Itoa(index), func() {
+			fmt.Println("Tapped", index)
+		}))
+	}
+
+	return items
+}
+
+func makeCell() fyne.CanvasObject {
+	rect := canvas.NewRectangle(&color.NRGBA{128, 128, 128, 255})
+	rect.SetMinSize(fyne.NewSize(30, 30))
+	return rect
+}
+
+func makeCenterLayout(_ fyne.Window) fyne.CanvasObject {
+	middle := widget.NewButton("CenterLayout", func() {})
+
+	return container.NewCenter(middle)
+}
+
+func makeDocTabsTab(_ fyne.Window) fyne.CanvasObject {
+	tabs := container.NewDocTabs(
+		container.NewTabItem("Doc 1", widget.NewLabel("Content of document 1")),
+		container.NewTabItem("Doc 2 bigger", widget.NewLabel("Content of document 2")),
+		container.NewTabItem("Doc 3", widget.NewLabel("Content of document 3")),
+	)
+	i := 3
+	tabs.CreateTab = func() *container.TabItem {
+		i++
+		return container.NewTabItem(fmt.Sprintf("Doc %d", i), widget.NewLabel(fmt.Sprintf("Content of document %d", i)))
+	}
+	locations := makeTabLocationSelect(tabs.SetTabLocation)
+	return container.NewBorder(locations, nil, nil, nil, tabs)
+}
+
+func makeGridLayout(_ fyne.Window) fyne.CanvasObject {
+	box1 := makeCell()
+	box2 := widget.NewLabel("Grid")
+	box3 := makeCell()
+	box4 := makeCell()
+
+	return container.NewGridWithColumns(2,
+		box1, box2, box3, box4)
+}
+
+func makeScrollTab(_ fyne.Window) fyne.CanvasObject {
+	hlist := makeButtonList(20)
+	vlist := makeButtonList(50)
+
+	horiz := container.NewHScroll(container.NewHBox(hlist...))
+	vert := container.NewVScroll(container.NewVBox(vlist...))
+
+	return container.NewAdaptiveGrid(2,
+		container.NewBorder(horiz, nil, nil, nil, vert),
+		makeScrollBothTab())
+}
+
+func makeScrollBothTab() fyne.CanvasObject {
+	logo := canvas.NewImageFromResource(theme.FyneLogo())
+	logo.SetMinSize(fyne.NewSize(800, 800))
+
+	scroll := container.NewScroll(logo)
+	scroll.Resize(fyne.NewSize(400, 400))
+
+	return scroll
+}
+
+func makeSplitTab(_ fyne.Window) fyne.CanvasObject {
+	left := widget.NewMultiLineEntry()
+	left.Wrapping = fyne.TextWrapWord
+	left.SetText("Long text is looooooooooooooong")
+	right := container.NewVSplit(
+		widget.NewLabel("Label"),
+		widget.NewButton("Button", func() { fmt.Println("button tapped!") }),
+	)
+	return container.NewHSplit(container.NewVScroll(left), right)
+}
+
+func makeTabLocationSelect(callback func(container.TabLocation)) *widget.Select {
+	locations := widget.NewSelect([]string{"Top", "Bottom", "Leading", "Trailing"}, func(s string) {
+		callback(map[string]container.TabLocation{
+			"Top":      container.TabLocationTop,
+			"Bottom":   container.TabLocationBottom,
+			"Leading":  container.TabLocationLeading,
+			"Trailing": container.TabLocationTrailing,
+		}[s])
+	})
+	locations.SetSelected("Top")
+	return locations
+}