How to get the local full path of the dragged file?

Developers Ruby API
1

I dragged a file into the window and wanted to get the local full path of the dragged file， but it didn’t work very well。As shown below：

图片
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my code：

################
# index.rb
################

require 'sketchup.rb'

dialog = UI::HtmlDialog.new(
  {
    :dialog_title => "drag_file_demo",
    :preferences_key => "com.example.html_dialog",
    :scrollable => true,
    :resizable => true,
    :width => 500,
    :height => 300,
    :left => 100,
    :top => 100,
    :style => UI::HtmlDialog::STYLE_DIALOG,
  }
)

dialog.add_action_callback("file_drop") do |action_context|
    hwnd = Win32API.new('user32', 'FindWindow', ['P', 'P'], 'L').call(0, "drag_file_demo")
    puts "hwnd: #{hwnd}"
    num_files = Win32API.new('shell32', 'DragQueryFile', ['L', 'L', 'P', 'L'], 'L').call(hwnd, 0xFFFFFFFF, nil, 0)
    puts "num_files = #{num_files}\n"

    if num_files > 0
        file_path = buffer.strip
        puts file_path
    end
end

# Show HTML dialog
dialog.set_file('C:/Users/whxcer/Desktop/file-upload/ruby_upload2/index.html')
dialog.show

<!-- C:/Users/whxcer/Desktop/file-upload/ruby_upload2/index.html -->

<!DOCTYPE html>
<html>
    <head>
        <script>
            function handleFileDrop(event) {
                event.preventDefault();

                sketchup.file_drop()
            }

            document.addEventListener("dragover", function(event) {
                event.preventDefault();
            }, false);

            document.addEventListener("drop", handleFileDrop, false);
        </script>
    </head>
    <body>
        <h1>
            Example of file drag and drop
        </h1>
        <p>
            Drop files here
        </p>
    </body>
</html>

question：
1. How can I solve this problem?
2. Or is there any other way to solve this problem?

Thank you so much！！