import gi
import sys
import os
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk, GObject

class SimpleTreeview():

    def main(self):
        self.lsFiles = Gtk.ListStore(GObject.TYPE_STRING)
        self.refresh_data(self.lsFiles)
        self.display_window()

    def refresh_data(self, liststore):
        liststore.clear()
        for r, d, f in os.walk("/home/user/tmp"):
            for file in f:
                liststore.append([os.path.join(r, file)])

    def on_click_fileSelect(self, tree_view, path, column):
        selection = tree_view.get_selection()
        value = selection.get_selected_rows()
        if value:
            model, iter = value
            ret = model.get_value(model.get_iter(iter[0]), 0)
            if sys.platform.startswith('linux'):
                subprocess.Popen(['xdg-open', ret])

    def on_drag_data_get(self, treeview, context, selection, info, time):
        data = []
        treeselection = treeview.get_selection()
        model, rows = treeselection.get_selected_rows()
        for row in rows:
            treeselection.select_path(row)
            value = model[row][0]
            data.append(value)
        text = str(os.linesep).join(data)
        selection.set_text(text, -1)
        return True


    def display_window(self):
        self.win = Gtk.Window()
        self.win.connect("destroy", Gtk.main_quit)
        self.layout = Gtk.VBox()
        self.win.add(self.layout)

        self.resultBox = Gtk.Box()

        self.fileSelect = Gtk.TreeView(model=self.lsFiles)
        self.fileSelect.get_selection().set_mode(Gtk.SelectionMode.SINGLE)

        cell = Gtk.CellRendererText()
        col = Gtk.TreeViewColumn("Filename", cell, text=0)
        col.set_sort_column_id(0)
        self.fileSelect.append_column(col)
        scroll = Gtk.ScrolledWindow()
        scroll.add(self.fileSelect)
        self.fileSelect.enable_model_drag_source(Gdk.ModifierType.BUTTON1_MASK,
            [('text/plain', Gtk.TargetFlags.OTHER_APP, 0)], Gdk.DragAction.DEFAULT | Gdk.DragAction.COPY)
        self.fileSelect.drag_source_add_text_targets()
        self.fileSelect.connect('row_activated', self.on_click_fileSelect)
        self.fileSelect.connect("drag-data-get", self.on_drag_data_get)
        self.fileSelect.columns_autosize()
        self.resultBox.pack_start(scroll, True, True, 0)

        self.layout.pack_start(self.resultBox, True, True, 0)
        self.win.set_default_size(800, 600)
        self.win.show_all()

        Gtk.main()


if __name__ == "__main__":
    SimpleTreeview().main()