public void installDndSupport(ChangeListOwner owner) {
myDragOwner = owner;
myDropTarget = new DropTarget();
myDndManager = DnDManager.getInstance();
myDndManager.registerSource(this);
myDndManager.registerTarget(myDropTarget, this);
}
@Override
public void dispose() {
if (myDropTarget != null) {
myDndManager.unregisterSource(this);
myDndManager.unregisterTarget(myDropTarget, this);
myDropTarget = null;
myDndManager = null;
myDragOwner = null;
}
}
protected final JTree createTree(boolean dndAware) {
final Tree tree;
final NullableFunction<Object, PsiElement> toPsiConverter =
o -> {
if (o instanceof HierarchyNodeDescriptor) {
return ((HierarchyNodeDescriptor) o).getContainingFile();
}
return null;
};
if (dndAware) {
tree =
new DnDAwareTree(new DefaultTreeModel(new DefaultMutableTreeNode(""))) {
@Override
public void removeNotify() {
super.removeNotify();
if (ScreenUtil.isStandardAddRemoveNotify(this))
myRefreshAction.unregisterCustomShortcutSet(this);
}
@Override
public boolean isFileColorsEnabled() {
return ProjectViewTree.isFileColorsEnabledFor(this);
}
@Override
public Color getFileColorFor(Object object) {
return ProjectViewTree.getColorForObject(object, myProject, toPsiConverter);
}
};
if (!ApplicationManager.getApplication().isHeadlessEnvironment()) {
DnDManager.getInstance()
.registerSource(
new DnDSource() {
@Override
public boolean canStartDragging(final DnDAction action, final Point dragOrigin) {
return getSelectedElements().length > 0;
}
@Override
public DnDDragStartBean startDragging(
final DnDAction action, final Point dragOrigin) {
return new DnDDragStartBean(
new TransferableWrapper() {
@Override
public TreeNode[] getTreeNodes() {
return tree.getSelectedNodes(TreeNode.class, null);
}
@Override
public PsiElement[] getPsiElements() {
return getSelectedElements();
}
@Override
public List<File> asFileList() {
return PsiCopyPasteManager.asFileList(getPsiElements());
}
});
}
@Override
public Pair<Image, Point> createDraggedImage(
final DnDAction action, final Point dragOrigin) {
return null;
}
@Override
public void dragDropEnd() {}
@Override
public void dropActionChanged(final int gestureModifiers) {}
},
tree);
}
} else {
tree =
new Tree(new DefaultTreeModel(new DefaultMutableTreeNode(""))) {
@Override
public void removeNotify() {
super.removeNotify();
if (ScreenUtil.isStandardAddRemoveNotify(this))
myRefreshAction.unregisterCustomShortcutSet(this);
}
@Override
public boolean isFileColorsEnabled() {
return ProjectViewTree.isFileColorsEnabledFor(this);
}
@Override
public Color getFileColorFor(Object object) {
return ProjectViewTree.getColorForObject(object, myProject, toPsiConverter);
}
};
}
configureTree(tree);
EditSourceOnDoubleClickHandler.install(tree);
myRefreshAction.registerShortcutOn(tree);
return tree;
}