Image Gallery

require(["v0.6"])

// Scan pics directory for image files
let scanImages = () => {
    let images = []

    // Read directory contents
    let entries = os.read_dir("pics")

    entries.each((entry) => {
        // Skip directories
        if (entry.is_dir) {
            return
        }

        let filename = entry.name

        // Skip README
        if (filename == "README.md") {
            return
        }

        // Check if file has image extension
        let lower = strings.to_lower(filename)
        if (strings.has_suffix(lower, ".png") || strings.has_suffix(lower, ".jpg") ||
            strings.has_suffix(lower, ".jpeg") || strings.has_suffix(lower, ".gif")) {
            images = images.append({
                filename: filename,
                path: "pics/" + filename
            })
        }
    })

    return images
}

// State management
let state = {
    images: scanImages()
}

let table = widget.NewTable("Image Gallery", 50)

// Set up table columns
table.Columns(() => ["Filename", "Preview", "Actions"])

// Set row count
table.RowCount(() => len(state.images))

// Data callback (required even in widget mode)
table.Data((offset, limit) => {
    let rows = []
    let count = len(state.images) - offset
    if (count > limit) {
        count = limit
    }
    range(count).each((i) => {
        rows = rows.append(["", "", ""])
    })
    return rows
})

// CreateCell - called once per cell to create widgets
table.CreateCell((col, row) => {
    if (col == 0) {
        // Filename column: label
        return widget.NewLabel("")
    } else if (col == 1) {
        // Preview column: create image widget with first image as placeholder
        if (len(state.images) > 0) {
            let firstImage = state.images[0]
            let absPath = os.getwd() + "/" + firstImage.path
            return canvas.NewImageFromURI("file://" + absPath)
        }
        return widget.NewLabel("[no images]")
    } else if (col == 2) {
        // Actions column: button
        return widget.NewButton("Open", () => {})
    }
    return widget.NewLabel("")
})

// UpdateCell - configure widgets with data
table.UpdateCell((col, row, cell) => {
    if (row >= len(state.images)) {
        return
    }

    let image = state.images[row]

    if (col == 0) {
        // Filename column
        cell.SetText(image.filename)
    } else if (col == 1) {
        // Preview column - load the image
        let absPath = os.getwd() + "/" + image.path
        cell.SetImageFromURI("file://" + absPath)
    } else if (col == 2) {
        // Actions column
        let path = image.path
        cell.SetText("Open")
        cell.OnTapped(() => {
            // Open in system viewer
            window.SetStatus("Opening: " + path)
            os.exec("xdg-open", path)
        })
    }
})

// Set column widths
table.SetColumnWidth(0, 250.0)  // Filename
table.SetColumnWidth(1, 180.0)  // Preview
table.SetColumnWidth(2, 100.0)  // Actions

// Refresh the table
table.Refresh()

// Create control panel
let refreshBtn = widget.NewButton("Refresh List", () => {
    state.images = scanImages()
    window.SetStatus(sprintf("Rescanning... found %d images", len(state.images)))
    table.Refresh()
})

let infoLabel = widget.NewLabel(sprintf("Found %d images in pics/", len(state.images)))

let controls = container.NewVBox([
    infoLabel,
    widget.NewSeparator(),
    refreshBtn,
    widget.NewLabel(""),
    widget.NewLabel("Add images to the pics/ directory"),
    widget.NewLabel("and click Refresh to see them."),
])

// Create main layout
let mainLayout = container.NewBorder(nil, nil, nil, controls, table)

window.SetContent(mainLayout)
window.Resize(800, 600)

cd examples/33-image-gallery
go run main.go

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