gistfile1.rb

require 'gtk3'

class FileManager
  INDEX = 0
  COL_PATH, COL_DISPLAY_NAME, COL_IS_DIR, COL_PIXBUF = (0..3).to_a

  def initialize
    win = Gtk::Window.new
    menu = Gtk::Menu.new
    swin =  Gtk::ScrolledWindow.new

    menus = create_menubar    
    toolbuttons = create_toolbar
    
    viewport  = Gtk::Viewport.new(swin.hadjustment, swin.vadjustment)

    vbox = Gtk::Box.new(:vertical, 2)
    hbox = Gtk::Box.new(:horizontal, 3)
    vbox.pack_start(menus, :expand => false, :fill => false, :padding => 2)
    vbox.pack_start(toolbuttons, :expand => false, :fill => false, :padding => 2)
    vbox.pack_start(swin, :expand => true, :fill => true, :padding => 1)

    create_store()
    fill_store()
    iconview = Gtk::IconView.new(@store)
    iconview.selection_mode = :multiple
    iconview.text_column = COL_DISPLAY_NAME
    iconview.pixbuf_column = COL_PIXBUF
    swin.add(iconview)
    # win settings
    win.set_default_size(600, 600)
    win.set_title("File Manager")
    win.signal_connect('destroy'){Gtk.main_quit}
    win.set_window_position(Gtk::Window::Position::CENTER)
    win.add(vbox)
    win.show_all
  end

def create_store
   @store = Gtk::ListStore.new(String, String, TrueClass, Gdk::Pixbuf)
end

def fill_store
    @store.clear
    icon_theme = Gtk::IconTheme.default
    file_icon = icon_theme.load_icon("gnome-fs-regular", 48, Gtk::IconTheme::LookupFlags::FORCE_SVG) 
    dir_icon = icon_theme.load_icon("gnome-fs-directory", 48, Gtk::IconTheme::LookupFlags::FORCE_SVG) 

    Dir.glob(File.join("/", "*")).each do |path|
        is_dir = FileTest.directory?(path)
        iter = @store.append
        iter[COL_DISPLAY_NAME] = GLib.filename_to_utf8(File.basename(path))
        iter[COL_PATH] = path
        iter[COL_IS_DIR] = is_dir
        iter[COL_PIXBUF] = is_dir ? dir_icon : file_icon
    end
end

def create_toolbar
    toolbar = Gtk::Toolbar.new 
    # tool buttons
    back_toolbut = Gtk::ToolButton.new(:stock_id => Gtk::Stock::GO_BACK)
    next_toolbut = Gtk::ToolButton.new(:stock_id => Gtk::Stock::GO_FORWARD)
    home_toolbut = Gtk::ToolButton.new(:stock_id => Gtk::Stock::HOME)
    up_toolbut = Gtk::ToolButton.new(:stock_id => Gtk::Stock::GO_UP)
    
    toolbar.insert(back_toolbut, 0)
    toolbar.insert(next_toolbut, 1)
    toolbar.insert(up_toolbut, 2)
    toolbar.insert(home_toolbut, 3)
end

def create_menubar
    menubar = Gtk::MenuBar.new
    # menus
    filemenu = Gtk::Menu.new
    viewmenu = Gtk::Menu.new
    helpmenu = Gtk::Menu.new
    
    # file items
    filem = Gtk::MenuItem.new("File")
    newtab_item = Gtk::MenuItem.new("New Tab") 
    newwindow_item = Gtk::MenuItem.new("New Window")
    closetab_item = Gtk::MenuItem.new("Close Tab")
    closewindow_item = Gtk::MenuItem.new("Close Window")
    properties_item = Gtk::MenuItem.new("Properties")
 
    filem.set_submenu(filemenu)
    filemenu.append(newtab_item)
    filemenu.append(newwindow_item)
    filemenu.append(closetab_item)
    filemenu.append(closewindow_item)
    filemenu.append(properties_item)

    # view items
    viewm = Gtk::MenuItem.new("View")
    reload_item = Gtk::MenuItem.new("Reload")

    viewm.set_submenu(viewmenu)
    viewmenu.append(reload_item)
    
    # help items
    helpm = Gtk::MenuItem.new("Help")
    projectwebsite_item = Gtk::MenuItem.new("Project Web Site")
    about_item = Gtk::MenuItem.new("About")

    helpm.set_submenu(helpmenu)
    helpmenu.append(projectwebsite_item)
    helpmenu.append(about_item)

    menubar.append(filem)
    menubar.append(viewm)
    menubar.append(helpm)
    return menubar
end

app = FileManager.new
Gtk.main

end