package com.vaadin.tests.dd;
import java.util.Iterator;
import com.vaadin.event.Transferable;
import com.vaadin.event.TransferableImpl;
import com.vaadin.event.dd.DragAndDropEvent;
import com.vaadin.event.dd.DropHandler;
import com.vaadin.event.dd.DropTarget;
import com.vaadin.event.dd.TargetDetails;
import com.vaadin.event.dd.acceptcriteria.AcceptCriterion;
import com.vaadin.event.dd.acceptcriteria.And;
import com.vaadin.event.dd.acceptcriteria.Not;
import com.vaadin.event.dd.acceptcriteria.SourceIsTarget;
import com.vaadin.event.dd.acceptcriteria.TargetDetailIs;
import com.vaadin.ui.Component;
import com.vaadin.ui.DragAndDropWrapper;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Window;
/**
* Same as with css layout but tests size change propagation on emphasis +
* rules.
*
*
*/
public class HorizontalLayoutSortableWithWrappers extends Window {
static int count;
private HorizontalLayout layout = new HorizontalLayout();
class WrappedLabel extends DragAndDropWrapper {
private static final long serialVersionUID = 1L;
public WrappedLabel(String content) {
super(new Label(content + " c:" + ++count));
getCompositionRoot().setWidth("60px");
getCompositionRoot().setHeight("60px");
setSizeUndefined();
setDragStartMode(DragStartMode.WRAPPER);
}
@Override
public DropHandler getDropHandler() {
return dh;
}
}
private DropHandler dh = new DropHandler() {
AcceptCriterion crit = new And(new TargetDetailIs("horizontalLocation",
"LEFT"), new Not(SourceIsTarget.get()));
@Override
public AcceptCriterion getAcceptCriterion() {
return crit;
}
@Override
public void drop(DragAndDropEvent dropEvent) {
Transferable transferable = dropEvent.getTransferable();
if (transferable instanceof TransferableImpl) {
TransferableImpl ct = (TransferableImpl) transferable;
Component sourceComponent = ct.getSourceComponent();
if (sourceComponent instanceof WrappedLabel) {
int index = 1;
Iterator<Component> componentIterator = layout
.getComponentIterator();
Component next = componentIterator.next();
TargetDetails dropTargetData = dropEvent.getTargetDetails();
DropTarget target = dropTargetData.getTarget();
while (next != target) {
if (next != sourceComponent) {
index++;
}
next = componentIterator.next();
}
if (dropTargetData.getData("horizontalLocation").equals(
"LEFT")) {
index--;
if (index < 0) {
index = 0;
}
}
layout.removeComponent(sourceComponent);
layout.addComponent(sourceComponent, index);
}
}
// TODO Auto-generated method stub
}
};
public HorizontalLayoutSortableWithWrappers() {
setCaption("Horizontally sortable layout via (ddwrappers): Try sorting blocks by dragging them");
DragAndDropWrapper pane = new DragAndDropWrapper(layout);
setContent(pane);
pane.setSizeFull();
setWidth("400px");
setHeight("100px");
for (int i = 0; i < 4; i++) {
layout.addComponent(new WrappedLabel("Block"));
}
}
}