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package com.vaadin.tests.dd;
import java.util.Collection;
import com.vaadin.data.Item;
import com.vaadin.data.util.HierarchicalContainer;
import com.vaadin.event.DataBoundTransferable;
import com.vaadin.event.Transferable;
import com.vaadin.event.dd.DragAndDropEvent;
import com.vaadin.event.dd.DropHandler;
import com.vaadin.event.dd.acceptcriteria.AcceptCriterion;
import com.vaadin.event.dd.acceptcriteria.Or;
import com.vaadin.server.VaadinRequest;
import com.vaadin.shared.ui.dd.VerticalDropLocation;
import com.vaadin.tests.components.AbstractTestUI;
import com.vaadin.ui.AbstractSelect;
import com.vaadin.ui.Tree;
import com.vaadin.ui.Tree.TreeDragMode;
import com.vaadin.ui.Tree.TreeTargetDetails;
/**
* DD playground. Better quality example/prototype codes in {@link DDTest2}.
*/
public class DDTest8 extends AbstractTestUI {
@Override
protected void setup(VaadinRequest request) {
final Tree tree = new Tree(
"Tree with criteria from AbstractSelect (OverItem, ContainsItem). Foo can be dragged anywhere, anything can be dropped on Foo or Bar. Bar5 subtree is also valid drop target.");
final HierarchicalContainer container = new HierarchicalContainer();
tree.setContainerDataSource(container);
tree.addItem("Foo");
tree.addItem("Bar");
tree.addItem("Bar1");
tree.addItem("Bar2");
tree.addItem("Bar3");
tree.addItem("Bar4");
tree.addItem("Bar5");
tree.addItem("Child");
tree.setParent("Child", "Foo");
tree.setSizeFull();
tree.setDragMode(TreeDragMode.NODE);
tree.setDropHandler(getDropHandler(tree, container));
getLayout().setSizeFull();
getLayout().getParent().setSizeFull();
addComponent(tree);
}
/**
* Moves items in tree (and could work in Table too). Also supports
* "building" tree.
*
* TODO fix algorithm, broken in some cases.
*
* @param tree
* @param container
* @return drop handler
*/
private DropHandler getDropHandler(final Tree tree,
final HierarchicalContainer container) {
return new DropHandler() {
@SuppressWarnings({ "unused", "unchecked" })
private void populateSubTree(HierarchicalContainer idx,
HierarchicalContainer subtree, Object itemId) {
Collection<?> children = subtree.getChildren(itemId);
if (children != null) {
for (Object childId : children) {
Item addItem = idx.addItem(childId);
if (addItem != null) {
// did not exist, populate properties
Item item = subtree.getItem(itemId);
Collection<?> itemPropertyIds = item
.getItemPropertyIds();
for (Object propId : itemPropertyIds) {
addItem.getItemProperty(propId)
.setValue(
item.getItemProperty(propId)
.getValue());
}
}
idx.setParent(childId, itemId);
populateSubTree(idx, subtree, childId);
}
}
}
@SuppressWarnings("unused")
private HierarchicalContainer getSubTree(HierarchicalContainer idx,
Object itemId) {
HierarchicalContainer hierarchicalContainer = new HierarchicalContainer();
Collection<?> containerPropertyIds = idx
.getContainerPropertyIds();
for (Object object : containerPropertyIds) {
hierarchicalContainer.addContainerProperty(object,
idx.getType(object), null);
}
hierarchicalContainer.addItem(itemId);
copyChildren(idx, hierarchicalContainer, itemId);
return hierarchicalContainer;
}
@SuppressWarnings("unchecked")
private void copyChildren(HierarchicalContainer source,
HierarchicalContainer target, Object itemId) {
Collection<?> children = source.getChildren(itemId);
if (children != null) {
for (Object childId : children) {
Item item = source.getItem(childId);
Item addedItem = target.addItem(childId);
target.setParent(childId, itemId);
Collection<?> itemPropertyIds = item
.getItemPropertyIds();
for (Object propertyId : itemPropertyIds) {
addedItem.getItemProperty(propertyId)
.setValue(
item.getItemProperty(propertyId)
.getValue());
}
copyChildren(source, target, childId);
}
}
}
@Override
public void drop(DragAndDropEvent event) {
TreeTargetDetails details = (TreeTargetDetails) event
.getTargetDetails();
// TODO set properties, so same sorter could be used in Table
Transferable transferable = event.getTransferable();
if (transferable instanceof DataBoundTransferable) {
DataBoundTransferable transferrable2 = (DataBoundTransferable) transferable;
Object itemId = transferrable2.getItemId();
Object itemIdOver = details.getItemIdOver();
// TODO could use the "folder" node id to make the drop
// logic simpler
Object itemIdInto = details.getItemIdInto();
VerticalDropLocation dropLocation = details
.getDropLocation();
Object itemIdAfter = details.getItemIdAfter();
if (itemIdOver.equals(itemIdInto)) { // directly on a node
container.setParent(itemId, itemIdOver);
return;
}
container.setParent(itemId, itemIdInto);
if (dropLocation == null) {
System.err.println("No detail of drop place available");
}
container.moveAfterSibling(itemId, itemIdAfter);
}
return;
}
@Override
public AcceptCriterion getAcceptCriterion() {
return new Or(new AbstractSelect.TargetItemIs(tree, "Foo",
"Bar"), new AbstractSelect.AcceptItem(tree, "Foo"),
tree.new TargetInSubtree("Bar5") //
);
}
};
}
@Override
protected String getTestDescription() {
return "Random DD tests";
}
@Override
protected Integer getTicketNumber() {
return 119;
}
}
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