PrintRectanglePositionHandler.java

/****************************************************************************
 **
 ** This demo file is part of yFiles for JavaFX 3.6.
 **
 ** Copyright (c) 2000-2023 by yWorks GmbH, Vor dem Kreuzberg 28,
 ** 72070 Tuebingen, Germany. All rights reserved.
 **
 ** yFiles demo files exhibit yFiles for JavaFX functionalities. Any redistribution
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 ** modification, is not permitted.
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 ** demo is shipped with are allowed to use the demo source code as basis
 ** for their own yFiles for JavaFX powered applications. Use of such programs is
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 ** THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY EXPRESS OR IMPLIED
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package viewer.printing;

import com.yworks.yfiles.geometry.IMutablePoint;
import com.yworks.yfiles.geometry.IPoint;
import com.yworks.yfiles.geometry.PointD;
import com.yworks.yfiles.view.input.IInputModeContext;
import com.yworks.yfiles.view.input.IPositionHandler;

/**
 * Simple implementation of an {@link IPositionHandler} that moves an
 * {@link IMutablePoint} by the dragged distance.
 */
public class PrintRectanglePositionHandler implements IPositionHandler {
  private IMutablePoint position;
  private PointD startPosition;

  /**
   * Creates a position handler that delegates to a mutable position.
   * @param position The position that will be read and changed.
   */
  public PrintRectanglePositionHandler(IMutablePoint position) {
    this.position = position;
  }

  public IPoint getLocation() {
    return position;
  }

  /**
   * Stores the initial position of the {@link IMutablePoint}.
   * @param context The context to retrieve information about the drag from.
   */
  public void initializeDrag(IInputModeContext context) {
    startPosition = position.toPointD();
  }

  /**
   * Moves the {@link IMutablePoint} away from the start position by the difference
   * between <code>newLocation</code> and <code>originalLocation</code>.
   */
  public void handleMove(IInputModeContext context, PointD originalLocation, PointD newLocation) {
    double currentX = startPosition.getX() + (newLocation.getX() - originalLocation.getX());
    double currentY = startPosition.getY() + (newLocation.getY() - originalLocation.getY());
    if (position.getX() != currentX || position.getY() != currentY) {
      position.setX(currentX);
      position.setY(currentY);
    }
  }

  /**
   * Moves the {@link IMutablePoint} back to the start position.
   */
  public void cancelDrag(IInputModeContext context, PointD originalLocation) {
    if (position.getX() != startPosition.getX() || position.getY() != startPosition.getY()) {
      position.setX(startPosition.getX());
      position.setY(startPosition.getY());
    }
  }

  public void dragFinished(IInputModeContext context, PointD originalLocation, PointD newLocation) {
  }
}