Stop images from being dragged.

Posted on 2013-01-06
Last Modified: 2013-01-08
I'm using <input> to contain images because <inputs> don't start being dragged like <img>'s do.  

I did this in particular for a situation where a drag clone is made to appear over a static "drag template" image.  I needed to stop the static drag template image from dragging.   All in non-library javascript, which is how I want it to work.  There's a lot of custom code and variable conditions determining what can or cannot be dragged on the page.

Might there be another way to deal with this problem of images being dragged?

Any help with this would be appreciated.

Question by:codequest
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LVL 33

Expert Comment

by:Big Monty
ID: 38751196
if you can put a div around the images, you can then do something like this:

<div id="myDiv" onmousedown="return false;">
   <img src='abc.gif' />

To totally protect images, watermark them. As soon as you display them on your page and someone visits it, it's been downloaded, so any script won't protect an image.

Author Comment

ID: 38751585
Thanks the input.   I tried variations on this:

<div id="GR_BA999" onmousedown = "return false;">
<img src="../../App_Images/DnDNewBoundary.BMP" alt="" width="35px" height="20px" onmousedown = "return false;"/>

Open in new window

However none of that stopped the image drag.   Here's a more complete description of the situation, and also a solution to that immediate problem.

I was hoping for something simpler because putting the image in an input has side effects.
LVL 33

Expert Comment

by:Big Monty
ID: 38751667
not 100% sure, but I don't think you're suppose to have spaces in a tags attribute, so change

<div id="GR_BA999" onmousedown = "return false;">


<div id="GR_BA999" onmousedown="return false;">
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Author Comment

ID: 38751948
Thanks for input.  Tried it: no change in behavior.
LVL 33

Expert Comment

by:Big Monty
ID: 38751962
not sure then, as that really should work. I would suggest click the Request Attention feature to see if there other experts who may be able to help.
LVL 35

Accepted Solution

Robert Schutt earned 500 total points
ID: 38754177
For me, the following works in IE9, FireFox and Chrome (up-to-date):
<img src="../../App_Images/DnDNewBoundary.BMP" alt="" width="35px" height="20px" ondragstart = "return false;"/>

Open in new window

No div, no input. The dragging simply doesn't start, the cursor doesn't change.

I must admit though that I'm not clear on the expected end result, sometimes you do need to enable dragging? Is it about protecting certain images? Because TBD's remark about that is spot on, stopping the dragging is not gonna stop people copying your images.

Author Comment

ID: 38755952
Thanks for the input. The ondragstart = "return false;" worked.  Big help.   That gives me more flexibility  And, it also worked inside the div, so more flexibility still.

I appreciate the comments on copying images;  that was not the concern.  The images in question are little diagram graphic icons, nothing special about them.

These graphics sit in header bar at the top of the diagram space, where they can be dragged (via a clone) onto the diagram.  The issue was that between the time I would mousedown on the "static/non-moving" graphic, and the time that the drag clone was positioned and made visible, the system would start dragging the static graphic, which would interfere with the drag clone operation.

Nice to get that fixed without having to make the static graphics into inputs.  Grazie!

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