drag & drop on treeviewer

[jemodurn]

Can you provide a sample of D&D on a jface treeviewer? Thanks.

[Phil Quitslund]

Sure!

The trick with DnD is that the drag source is implicitly set by the last mouseMove/click. To start a drag from a tree item in the tree "tree", you can do something like this:

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ui.click("tree", "path/to/source"); //implicitly set drag source

where "path/to/source" is the tree path to the node.

To drag it, we can then do something like this:

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ui.dragTo("tree", "path/to/target");

Alternatively, we could establish the drag source using a moveTo command if we have a handle on the source tree item. For example:

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Widget treeItem = ui.find(new WidgetLocator(TreeItem.class, "SourceItem"); //find source by label
ui.moveTo(treeItem); //hover the mouse and set the drag source

Having done this we can drag and drop as above:

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ui.dragTo("tree", "path/to/target");

Hope this helps!