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Dragging and dropping objects

Hello!

I'm quite new to Delphi and I know how things should work in theory because I have been programming with other languages for years. I'm trying to make a simple image browser with one form.

On Form1 I have two Scrollboxes. In the first Scrollbox I would like to put the objects (thumbnail images which are created on run-time).

And then I have a second Scrollbox. The thumbnails which I have in Scrollbox1 are based on the code found at http://www.b-zone.de/zips/thmbnail.zip

The biggest problem I have is that I don't know how to drag a object from Scrollbox1 to Scrollbox2.
0
mazze
Asked:
mazze
1 Solution
 
huferryCommented:
The theory is:

The source component:
- Set the property DragMode to dmAutomatic
- Use the event OnStartDrag
- Pass your parameter as an TDragObject instance

The target component:
- Use the event OnDragOver, based on the Sender and
  the Source you can decide either to accept or reject it.
- Sender = source component; Source = Drag object
- Use the event OnDragDrop to handle the object dropping.
  Again, you'll get the Sender and the Source
- TDragObject will be automatically destroyed.

happy trying!

regards,
huferry
0
 
mazzeAuthor Commented:
Thanks! I finally solved the problem even if it took several hours for me to do it.
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