RasterThumbnailBrowser items reordering using drag and drop

Hello,

Atalasoft already has feature which allows to reorder items in thumbnailBrowser using drag and drop. Could you implement it please? We very need this feature.

Best regards,
Rabb89

I forgot to mention that we can't implement it like in here http://support.leadtools...ShowPost.aspx#6073  because we don't operate on files but on RasterImage instances.

Just read from documentantion that ThumbnailBrowser is purposed for creating thumbnails on disk, so I would say that is feature request rather for RasterImageList than for RasterThumbnailBrowser

I am attaching a small LEADTOOLS v17 VS2008 C# project that shows how you can reorder items in RasterImageList using drag and drop.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

Thank you very much for this example. I have only 2 issues with it:

1) It doesn't support multiselected items moving
2) It would be very very helpful to see where moving items will be placed via helper line (illustrated in screenshot)

Could you add this features to example, please?

Btw. tell me please does RasterImageList support lazy loading? (ilustrated in lazy loading.jpg) - if there were thousands of images, it would waste a lot of memory if load all at start.

Thank you a lot,
Rabb89

Attachment

About efficient loading of thumbnails, this is shown in the demo attached with the following forum post:
http://support.leadtools.com/SupportPortal/CS/forums/32636/ShowPost.aspx

About multi-selecting items, this is supported in our image list, and you can enable it using the RasterImageList.SelectionMode property.

About marking the location where you want to drop the items, you can do that by drawing the mark using the rasterImageList1.CreateGraphics() method, then use the .NET GDI+ drawing methods to make your mark.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

I already tried to modify your example with SelectionMode = Multi but unfortunately when you select e.g two items and then mouse down to start dragging selection disapears (only mouseDowned item stays selected)

Thanks
Rabb89

OK, I will try to do the changes you requested, so please send an email to support@leadtools.com and mention this forum post to follow up.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

hello ,
is this example updated for multiple files selection ?

There are ways to handle drag and drop with multiple items selection. One of them is shown in the attached demo, but this demo does not cover all cases and is only intended to show the basic idea of dragging several items together.

If you want to use this code in your actual project, you should test all cases carefully such as when the user clicks on different parts of the control or drags in different ways, and you might have to modify the code based on your requirements.