File Drop Example

This example demonstrates how to handle files being dragged from the operating system (Finder, Explorer, file managers) into a Wails application.

Dropped files are automatically categorised by type and displayed in separate buckets: documents, images, or other files.

How it works

1. Enable file drops in window options:

   goCopy

   EnableFileDrop: true
   

2. Mark elements as drop targets in HTML:

   htmlCopy

   <div data-file-drop-target>Drop files here</div>
   

3. Listen for the WindowFilesDropped event:

   goCopy

   win.OnWindowEvent(events.Common.WindowFilesDropped, func(event *application.WindowEvent) {
       files := event.Context().DroppedFiles()
       details := event.Context().DropTargetDetails()
       // Handle the dropped files
   })
   

4. Optionally forward to frontend:

   goCopy

   application.Get().Event.Emit("files-dropped", map[string]any{
       "files":   files,
       "details": details,
   })
   

Drop Target Details

When files are dropped, you can get information about the drop location:

• ElementID - The ID of the element that received the drop
• ClassList - CSS classes on the drop target
• X, Y - Coordinates of the drop within the element

Styling

When files are dragged over a valid drop target, Wails adds the file-drop-target-active class:

.file-drop-target-active {
    border-color: #4a9eff;
    background: rgba(74, 158, 255, 0.1);
}

Running the example

go run main.go

Then drag files from your desktop or file manager into the drop zone.

HTML5 Drag and Drop API

This example also includes a demonstration for dragging elements within your application via the HTML5 Drag and Drop API.

Scroll down to the Internal Drag and Drop section within the launched application to interact with the demo.

Status