Show colors

[mattrust]

Colors are shown as numbers. It would be nice to see them visually.

Suggestion from Copilot:
package main

import (
"image/color"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/app"
"fyne.io/fyne/v2/canvas"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/widget"
)

func main() {
a := app.New()
w := a.NewWindow("Table Example")

data := [][]string{
    {"Row 1, Col 1", "Row 1, Col 2"},
    {"Row 2, Col 1", "Row 2, Col 2"},
}

table := &widget.Table{
    Length: func() (int, int) {
        return len(data), len(data[0])
    },
    CreateCell: func() fyne.CanvasObject {
        // Create a container with a colored background and a label
        background := canvas.NewRectangle(color.White)
        label := canvas.NewText("", color.Black)
        return container.NewMax(background, label)
    },
    UpdateCell: func(id widget.TableCellID, cell fyne.CanvasObject) {
        // Update the label text
        cont := cell.(*fyne.Container)
        label := cont.Objects[1].(*canvas.Text)
        label.Text = data[id.Row][id.Col]

        // Change the background color of specific cells
        background := cont.Objects[0].(*canvas.Rectangle)
        if id.Row == 1 && id.Col == 1 {
            background.FillColor = color.RGBA{R: 255, G: 0, B: 0, A: 255} // Red
        } else {
            background.FillColor = color.White
        }

        label.Refresh()
        background.Refresh()
    },
}

w.SetContent(container.NewMax(table))
w.Resize(fyne.NewSize(400, 200))
w.ShowAndRun()

}