Drag & Drop from Datatree to Datatree

265

T Jansen posted over 12 years ago

Hello,

i want to copy a Item from one tree to a child of a second tree with drag and drop.
I need my own custom rules to allow them or forbid them.

I try the drag drop options from tree and the drag drop framework. But both doesn't do it.

My Problems with "drag drop framework"
i can drag a node, but i can only drop them to the second tree element, i can't select a node of them to drop them.
problem with drag drop from datatree.
the tree call automatically funtions to move the node, i simple wan't a event that says "this SourceNode attemp to add to this TargetNode"

It should look like two windows explorer. What would you recommend To implement this?

With regards from Germany

Thomas

138253

Offline Stefan posted over 12 years ago in reply to T Jansen

Hello Thomas,

It seems like that this is the best approach for achieving the functionality you want, but if I think of a better solution for you I will let you know.
Cancel
Reply

Cancel
265

T Jansen posted over 12 years ago in reply to Stefan

Hi Steffan,

thanks for replay but the solution is not suitable for me, I have to check each node to decide whether I can drop it here or not.

any idea?
Cancel
Reply

Cancel
138253

Offline Stefan posted over 12 years ago in reply to T Jansen

Hello Thomas,

I have modified the sample I sent you before, so now you are only able to move or copy nodes from one tree to another. As for the refreshing of the data I can suggest you either implement INotifyColectionChanged interface for your collection or use ObservableCollection for example, which implements it internally.

DDBetweenTrees.zip
Cancel
Reply

Cancel
265

T Jansen posted over 12 years ago in reply to Stefan
Hi Stefan,

i like this solution. But I still have some questions.

Is there a way to reload the childs of one node, because a firing of "PropertyChanged(this, new PropertyChangedEventArgs("Childnodes"))" in my Collection doesn't refresh the childnodes in the Datatree.

How can i change the cursor by mouseover a other node, something like "nodeover --> Cursor = notallowed"

if i move a node, i will only add them to other nodes, not moved them between other nodes, I can suppress the display of the drop-line?

With regards from Germany

Thomas
Cancel
Reply

Cancel
138253

Offline Stefan posted over 12 years ago

Hello Thomas,

Thank you for your post. I have been looking into it and I have created a sample project for you with the functionality you want. You can hold down Ctrl if you want to copy the item or just drag and drop it to move it. Please let me know if this helps you or you need further assistance on this matter.

Looking forward for your reply.

DDBetweenTrees.zip
Cancel
Reply

Cancel