plugins/ui-designer/src/com/intellij/uiDesigner/designSurface/ComponentDropLocation.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.intellij.uiDesigner.designSurface;

import com.intellij.uiDesigner.radComponents.RadComponent;
import com.intellij.uiDesigner.radComponents.RadContainer;
import com.intellij.uiDesigner.core.GridConstraints;
import org.jetbrains.annotations.Nullable;

/**
 * @author yole
 */
public interface ComponentDropLocation {
  enum Direction { LEFT, UP, RIGHT, DOWN }

  RadContainer getContainer();

  boolean canDrop(ComponentDragObject dragObject);

  void placeFeedback(FeedbackLayer feedbackLayer, ComponentDragObject dragObject);

  void processDrop(GuiEditor editor,
                   RadComponent[] components,
                   @Nullable GridConstraints[] constraintsToAdjust,
                   ComponentDragObject dragObject);

  @Nullable
  ComponentDropLocation getAdjacentLocation(Direction direction);
}