CEdgeClickedLeftState.java

/*
Copyright 2011-2016 Google Inc. All Rights Reserved.

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.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.states;

import com.google.common.base.Preconditions;
import com.google.security.zynamics.zylib.gui.zygraph.editmode.CStateChange;
import com.google.security.zynamics.zylib.gui.zygraph.editmode.IMouseState;
import com.google.security.zynamics.zylib.gui.zygraph.editmode.IMouseStateChange;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.AbstractZyGraph;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.edges.ZyGraphEdge;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.CStateFactory;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.transformations.CHitEdgesTransformer;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.nodes.ZyGraphNode;

import y.base.Edge;
import y.view.HitInfo;

import java.awt.event.MouseEvent;

public class CEdgeClickedLeftState implements IMouseState {
  private final CStateFactory<?, ?> m_factory;

  private final AbstractZyGraph<?, ?> m_graph;

  private final Edge m_edge;

  public CEdgeClickedLeftState(final CStateFactory<?, ?> factory,
      final AbstractZyGraph<?, ?> graph, final Edge edge) {
    m_factory = Preconditions.checkNotNull(factory, "Error: factory argument can not be null");
    m_graph = Preconditions.checkNotNull(graph, "Error: graph argument can not be null");
    m_edge = Preconditions.checkNotNull(edge, "Error: edge argument can not be null");
  }

  public ZyGraphEdge<?, ?, ?> getEdge() {
    return m_graph.getEdge(m_edge);
  }

  public AbstractZyGraph<?, ?> getGraph() {
    return m_graph;
  }

  @Override
  public CStateFactory<? extends ZyGraphNode<?>, ? extends ZyGraphEdge<?, ?, ?>> getStateFactory() {
    return m_factory;
  }

  @Override
  public IMouseStateChange mouseDragged(final MouseEvent event, final AbstractZyGraph<?, ?> graph) {
    return new CStateChange(this, true);
  }

  @Override
  public IMouseStateChange mouseMoved(final MouseEvent event, final AbstractZyGraph<?, ?> graph) {
    final double x = graph.getEditMode().translateX(event.getX());
    final double y = graph.getEditMode().translateY(event.getY());

    final HitInfo hitInfo = graph.getGraph().getHitInfo(x, y);

    if (hitInfo.hasHitEdges()) {
      return CHitEdgesTransformer.changeEdge(m_factory, event, hitInfo, m_edge);
    } else {
      m_factory.createEdgeExitState(m_edge, event);

      return CHitEdgesTransformer.exitEdge(m_factory, event, hitInfo, this);
    }
  }

  @Override
  public IMouseStateChange mousePressed(final MouseEvent event, final AbstractZyGraph<?, ?> graph) {
    return new CStateChange(m_factory.createDefaultState(), true);
  }

  @Override
  public IMouseStateChange mouseReleased(final MouseEvent event, final AbstractZyGraph<?, ?> graph) {
    return new CStateChange(m_factory.createDefaultState(), true);
  }
}