Added a Grid example to the presentation.

demos/presentation/grid.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"github.com/gdamore/tcell"
+	"github.com/rivo/tview"
+)
+
+// Grid demonstrates the grid layout.
+func Grid(nextSlide func()) (title string, content tview.Primitive) {
+	modalShown := false
+	pages := tview.NewPages()
+
+	newPrimitive := func(text string) tview.Primitive {
+		return tview.NewTextView().
+			SetTextAlign(tview.AlignCenter).
+			SetText(text).
+			SetDoneFunc(func(key tcell.Key) {
+				if modalShown {
+					nextSlide()
+					modalShown = false
+				} else {
+					pages.ShowPage("modal")
+					modalShown = true
+				}
+			})
+	}
+
+	menu := newPrimitive("Menu")
+	main := newPrimitive("Main content")
+	sideBar := newPrimitive("Side Bar")
+
+	grid := tview.NewGrid().
+		SetRows(3, 0, 3).
+		SetColumns(0, -4, 0).
+		SetBorders(true).
+		AddItem(newPrimitive("Header"), 0, 0, 1, 3, 0, 0, true).
+		AddItem(newPrimitive("Footer"), 2, 0, 1, 3, 0, 0, false)
+
+	// Layout for screens narrower than 100 cells (menu and side bar are hidden).
+	grid.AddItem(menu, 0, 0, 0, 0, 0, 0, false).
+		AddItem(main, 1, 0, 1, 3, 0, 0, false).
+		AddItem(sideBar, 0, 0, 0, 0, 0, 0, false)
+
+	// Layout for screens wider than 100 cells.
+	grid.AddItem(menu, 1, 0, 1, 1, 0, 100, false).
+		AddItem(main, 1, 1, 1, 1, 0, 100, false).
+		AddItem(sideBar, 1, 2, 1, 1, 0, 100, false)
+
+	modal := tview.NewModal().
+		SetText("Resize the window to see how the grid layout adapts").
+		AddButtons([]string{"Ok"}).SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+		pages.HidePage("modal")
+	})
+
+	pages.AddPage("grid", grid, true, true).
+		AddPage("modal", modal, false, false)
+
+	return "Grid", pages
+}

demos/presentation/main.go

@@ -41,6 +41,7 @@ func main() {
 		TextView2,
 		Table,
 		Flex,
+		Grid,
 		Colors,
 		End,
 	}