ZyGraphFineGrainedRenderer.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;

import com.google.security.zynamics.zylib.gui.zygraph.IFineGrainedSloppyGraph2DView;

import y.view.DefaultGraph2DRenderer;
import y.view.EdgeRealizer;
import y.view.Graph2D;
import y.view.NodeRealizer;

import java.awt.Graphics2D;

public class ZyGraphFineGrainedRenderer<ViewType extends IFineGrainedSloppyGraph2DView> extends
    DefaultGraph2DRenderer {
  /**
   * This class implements the more fine-grained rendering by overloading the regular "paint"
   * methods for nodes & edges. Within this function, the decision on whether to paint the
   * nodes/edges in sloppy or non-sloppy mode is then made.
   */
  protected ViewType m_view;
  private boolean m_drawEdges = true;

  public ZyGraphFineGrainedRenderer(final ViewType view) {
    m_view = view;
  }

  @Override
  protected void paint(final Graphics2D gfx, final EdgeRealizer er) {
    if (!m_drawEdges) {
      return;
    }
    if (m_view.isEdgeSloppyPaintMode()) {
      er.paintSloppy(gfx);
    } else {
      er.paint(gfx);
    }
  }

  @Override
  protected void paint(final Graphics2D gfx, final NodeRealizer nr) {
    if (m_view.isNodeSloppyPaintMode()) {
      nr.paintSloppy(gfx);
    } else {
      nr.paint(gfx);
    }
  }

  @Override
  protected void paintLayered(final Graphics2D gfx, final int layer, final EdgeRealizer er) {
    super.paintLayered(gfx, layer, er);
  }

  // Layered painting methods
  @Override
  protected void paintLayered(final Graphics2D gfx, final int layer, final NodeRealizer nr) {
    super.paintLayered(gfx, layer, nr);
  }

  @Override
  protected void paintSloppy(final Graphics2D gfx, final EdgeRealizer er) {
    assert false : "The sloppy paint methods should not be called";
  }

  @Override
  protected void paintSloppy(final Graphics2D gfx, final NodeRealizer nr) {
    assert false : "The sloppy paint methods should not be called";
  }

  @Override
  protected void paintSloppyLayered(final Graphics2D gfx, final int layer, final EdgeRealizer er) {
    assert false : "The sloppy paint methods should not be called";
  }

  // Sloppy Layered painting methods. These shouldn't actually be reached any
  // more due to the ZyGraph2DView deferring the sloppy/nonsloppy decision to
  // this renderer.
  @Override
  protected void paintSloppyLayered(final Graphics2D gfx, final int layer, final NodeRealizer nr) {
    assert false : "The sloppy paint methods should not be called";
  }

  // Regular painting methods
  @Override
  public void paint(final Graphics2D gfx, final Graph2D graph) {
    // Get & cache these values in the local object to prevent excessive method
    // invocation overhead when all the edges & nodes are drawn below
    m_drawEdges = m_view.drawEdges();
    super.paint(gfx, graph);
  }
}