511188 - Image drag-and-drop interferes with mouse events for svg application

Status: RESOLVED INVALID

(Core :: DOM: Copy & Paste and Drag & Drop, defect)

Description

[Marcus Andersson]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5

I have a SVG application which let me move an image within a frame by dragging it with the mouse (see URL). The problem is that the built in image drag-and-drop in Firefox interferes with the mouse event stream to the SVG application. The initial mouse down and mouse move events are sent to SVG, but when image drag-and-drop kicks in, the event stream is cut off.

Reproducible: Always

Steps to Reproduce:
1. Klick and hold over Firefox logo.
2. Drag mouse. Image starts to move.
3. Image stops moving when drag-and-drop kicks in.
4. Release mouse button. Drag mouse. Image moves, because mouse up event not sent to SVG application.


Expected Results:  
Image drag-and-drop should not cut off event stream to SVG application. The image should move when dragged, and stop when mouse button is released. This worked in earlier versions of Firefox.

I wonder what makes my case different from google maps, where images are dragged as well?

Comment 1

[Ria Klaassen (not reading all bugmail)]

Confirmed on Windows Vista, latest trunk.

Comment 2

[Neil Deakin]

If you don't want existing behaviour to occur, you need to cancel the events.

Comment 3

[Marcus Andersson]

Cancel which events? Is is possible to turn off Firefox built-in image drag-and-drop in a local context?

Comment 4

[Neil Deakin]

The dragstart event.

Comment 5

[Robert Longson [:longsonr]]

You need to call evt.preventDefault() in the drag handlers.