This example demonstrates how the Uploader can be rendered as a transparent layer on top of your own UI, and how the upload queue of multiple files can be managed automatically.
Note: The YUI Uploader Control requires Flash Player 9.0.45 or higher. The latest version of Flash Player is available at the Adobe Flash Player Download Center.
Note: The YUI Uploader Control requires the uploader.swf Flash file that is distributed as part of the YUI package, in the uploader/assets folder. Copy the uploader.swf to your server and set the YAHOO.Uploader.SWFURL variable to its full path.
Note: This example uses a server-side script to accept file uploads. The script used does not open or store any data sent to it. Nonetheless, when trying out the example, do not send any sensitive or private data. Do not exceed file size of 10 MB.
In this example, we allow the user to select multiple images and videos, and upload them to the server, while tracking progress on the upload. The user can also choose how many files to upload simultaneously. Because of security changes in Flash Player 10, the UI for invoking the "Browse" dialog has to be contained within the Flash player. In this example, the Flash player is rendered as a transparent overlay on top of a custom HTML-based UI. The Uploader running in the Flash player dispatches necessary mouse events to the DOM to make visual changes to the overlaid UI.
For starters, let's define the necessary UI styles. We will use regular text links as the UI, and switch their background color when the mouse hovers over them.
Next, we'll place the UI elements on the page. Notice that the
selectFilesLink div is overlaid by the
uploaderOverlay is where we'll place the transparent Flash UI layer, that will dispatch various mouse events, based on which we will be able to change the appearance of the UI below.
We also add a dropdown for setting the number of simultaneous uploads, and a container for the YUI DataTable that will display the list of uploaded files and upload progress.
Once the DOM is ready, we can size our container for the transparent UI to the link below it. The following code accomplishes that: