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package org.eclipse.fx.ecp.ui.controls;
import java.util.Collection;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.control.Button;
import javafx.scene.control.Hyperlink;
import javafx.scene.control.Label;
import javafx.scene.control.SkinBase;
import javafx.scene.control.Tooltip;
import javafx.scene.input.DragEvent;
import javafx.scene.input.TransferMode;
import javafx.scene.layout.BorderPane;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecp.edit.ECPControlContext;
import org.eclipse.emf.edit.command.SetCommand;
import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
import org.eclipse.fx.ecp.ui.ECPControl;
import org.eclipse.fx.ecp.ui.ECPUtil;
import org.eclipse.fx.emf.edit.ui.dnd.LocalTransfer;
public class ReferenceControl extends ECPControlBase {
protected final EReference reference;
protected final AdapterImpl valueAdapter;
protected BorderPane borderPane;
protected Hyperlink hyperlink;
protected Button unsetButton;
protected Command setCommand;
protected Command unsetCommand;
protected Label label;
public ReferenceControl(IItemPropertyDescriptor propertyDescriptor, final ECPControlContext context) {
super(propertyDescriptor, context);
reference = (EReference) feature;
setSkin(new Skin(this));
hyperlink.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent arg0) {
Object value = modelElement.eGet(reference);
if (value instanceof EObject)
context.openInNewContext((EObject) value);
}
});
EventHandler<DragEvent> dragEventHandler = new EventHandler<DragEvent>() {
@Override
public void handle(DragEvent event) {
Object object = LocalTransfer.INSTANCE.getObject();
if (object instanceof Collection<?>) {
Collection<?> collection = (Collection<?>) object;
object = collection.size() == 1 ? collection.iterator().next() : null;
}
Command command = SetCommand.create(editingDomain, modelElement, reference, object);
if (command.canExecute()) {
setCommand = command;
event.acceptTransferModes(TransferMode.COPY_OR_MOVE);
} else {
setCommand = null;
}
}
};
label.setOnDragOver(dragEventHandler);
hyperlink.setOnDragOver(dragEventHandler);
EventHandler<DragEvent> dropEventHandler = new EventHandler<DragEvent>() {
@Override
public void handle(DragEvent arg0) {
if (setCommand != null)
editingDomain.getCommandStack().execute(setCommand);
}
};
label.setOnDragDropped(dropEventHandler);
hyperlink.setOnDragDropped(dropEventHandler);
valueAdapter = new AdapterImpl() {
@Override
public void notifyChanged(Notification msg) {
update();
}
};
update();
}
@Override
protected void update() {
Object value = modelElement.eGet(reference);
if (unsetButton != null) {
unsetCommand = SetCommand.create(editingDomain, modelElement, reference, SetCommand.UNSET_VALUE);
unsetButton.setDisable(value == null || !unsetCommand.canExecute());
}
if (value instanceof EObject) {
EObject eObject = (EObject) value;
// TODO remove adapter from previous value
eObject.eAdapters().add(valueAdapter);
String text = ECPUtil.getText(value);
hyperlink.setText(text);
Node graphic = ECPUtil.getGraphic(value);
hyperlink.setGraphic(graphic);
borderPane.setLeft(hyperlink);
} else {
borderPane.setLeft(label);
}
}
class Skin extends SkinBase<ReferenceControl> {
Skin(ReferenceControl control) {
super(control);
borderPane = new BorderPane();
getChildren().add(borderPane);
label = new Label("Drop " + feature.getEType().getName() + " here");
label.getStyleClass().add("reference-drop-label");
hyperlink = new Hyperlink();
if (reference.isUnsettable()) {
unsetButton = new Button();
borderPane.setRight(unsetButton);
unsetButton.getStyleClass().add("unset-reference-button");
ECPUtil.addMark(unsetButton, "cross");
Tooltip tooltip = new Tooltip("Remove reference");
unsetButton.setTooltip(tooltip);
unsetButton.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent arg0) {
if (unsetCommand.canExecute())
editingDomain.getCommandStack().execute(unsetCommand);
}
});
}
}
}
public static class Factory implements ECPControl.Factory {
@Override
public ECPControlBase createControl(IItemPropertyDescriptor itemPropertyDescriptor, ECPControlContext context) {
return new ReferenceControl(itemPropertyDescriptor, context);
}
}
}
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