com.mxgraph.swing.util.mxMorphing Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of AptSpringProcessor Show documentation
This project contains the apt processor that implements all the checks enumerated in @Verify. It is a self contained, and shaded jar.
The newest version!
/**
 * Copyright (c) 2007, Gaudenz Alder
 */
package com.mxgraph.swing.util;

import java.awt.Graphics;
import java.util.HashMap;
import java.util.Map;

import com.mxgraph.model.mxGeometry;
import com.mxgraph.swing.mxGraphComponent;
import com.mxgraph.swing.view.mxCellStatePreview;
import com.mxgraph.util.mxEvent;
import com.mxgraph.util.mxEventObject;
import com.mxgraph.util.mxPoint;
import com.mxgraph.util.mxRectangle;
import com.mxgraph.view.mxCellState;
import com.mxgraph.view.mxGraph;

/**
 * Provides animation effects.
 */
public class mxMorphing extends mxAnimation
{

	/**
	 * Reference to the enclosing graph instance.
	 */
	protected mxGraphComponent graphComponent;

	/**
	 * Specifies the maximum number of steps for the morphing. Default is
	 * 6.
	 */
	protected int steps;

	/**
	 * Counts the current number of steps of the animation.
	 */
	protected int step;

	/**
	 * Ease-off for movement towards the given vector. Larger values are
	 * slower and smoother. Default is 1.5.
	 */
	protected double ease;

	/**
	 * Maps from cells to origins. 
	 */
	protected Map origins = new HashMap();

	/**
	 * Optional array of cells to limit the animation to. 
	 */
	protected Object[] cells;

	/**
	 * 
	 */
	protected transient mxRectangle dirty;

	/**
	 * 
	 */
	protected transient mxCellStatePreview preview;

	/**
	 * Constructs a new morphing instance for the given graph.
	 */
	public mxMorphing(mxGraphComponent graphComponent)
	{
		this(graphComponent, 6, 1.5, DEFAULT_DELAY);

		// Installs the paint handler
		graphComponent.addListener(mxEvent.AFTER_PAINT, new mxIEventListener()
		{
			public void invoke(Object sender, mxEventObject evt)
			{
				Graphics g = (Graphics) evt.getProperty("g");
				paint(g);
			}
		});
	}

	/**
	 * Constructs a new morphing instance for the given graph.
	 */
	public mxMorphing(mxGraphComponent graphComponent, int steps, double ease,
			int delay)
	{
		super(delay);
		this.graphComponent = graphComponent;
		this.steps = steps;
		this.ease = ease;
	}

	/**
	 * Returns the number of steps for the animation.
	 */
	public int getSteps()
	{
		return steps;
	}

	/**
	 * Sets the number of steps for the animation.
	 */
	public void setSteps(int value)
	{
		steps = value;
	}

	/**
	 * Returns the easing for the movements.
	 */
	public double getEase()
	{
		return ease;
	}

	/**
	 * Sets the easing for the movements.
	 */
	public void setEase(double value)
	{
		ease = value;
	}

	/**
	 * Optional array of cells to be animated. If this is not specified
	 * then all cells are checked and animated if they have been moved
	 * in the current transaction.
	 */
	public void setCells(Object[] value)
	{
		cells = value;
	}

	/**
	 * Animation step.
	 */
	public void updateAnimation()
	{
		super.updateAnimation();
		preview = new mxCellStatePreview(graphComponent, false);

		if (cells != null)
		{
			// Animates the given cells individually without recursion
			for (Object cell : cells)
			{
				animateCell(cell, preview, false);
			}
		}
		else
		{
			// Animates all changed cells by using recursion to find
			// the changed cells but not for the animation itself
			Object root = graphComponent.getGraph().getModel().getRoot();
			animateCell(root, preview, true);
		}

		show(preview);

		if (preview.isEmpty() || step++ >= steps)
		{
			stopAnimation();
		}
	};

	/**
	 * 
	 */
	public void stopAnimation()
	{
		graphComponent.getGraph().getView().revalidate();
		super.stopAnimation();

		preview = null;

		if (dirty != null)
		{
			graphComponent.getGraphControl().repaint(dirty.getRectangle());
		}
	}

	/**
	 * Shows the changes in the given mxCellStatePreview.
	 */
	protected void show(mxCellStatePreview preview)
	{
		if (dirty != null)
		{
			graphComponent.getGraphControl().repaint(dirty.getRectangle());
		}
		else
		{
			graphComponent.getGraphControl().repaint();
		}

		dirty = preview.show();

		if (dirty != null)
		{
			graphComponent.getGraphControl().repaint(dirty.getRectangle());
		}
	}

	/**
	 * Animates the given cell state using moveState.
	 */
	protected void animateCell(Object cell, mxCellStatePreview move,
			boolean recurse)
	{
		mxGraph graph = graphComponent.getGraph();
		mxCellState state = graph.getView().getState(cell);
		mxPoint delta = null;

		if (state != null)
		{
			// Moves the animated state from where it will be after the model
			// change by subtracting the given delta vector from that location
			delta = getDelta(state);

			if (graph.getModel().isVertex(cell)
					&& (delta.getX() != 0 || delta.getY() != 0))
			{
				mxPoint translate = graph.getView().getTranslate();
				double scale = graph.getView().getScale();

				// FIXME: Something wrong with the scale
				delta.setX(delta.getX() + translate.getX() * scale);
				delta.setY(delta.getY() + translate.getY() * scale);

				move.moveState(state, -delta.getX() / ease, -delta.getY()
						/ ease);
			}
		}

		if (recurse && !stopRecursion(state, delta))
		{
			int childCount = graph.getModel().getChildCount(cell);

			for (int i = 0; i < childCount; i++)
			{
				animateCell(graph.getModel().getChildAt(cell, i), move, recurse);
			}
		}
	}

	/**
	 * Returns true if the animation should not recursively find more
	 * deltas for children if the given parent state has been animated.
	 */
	protected boolean stopRecursion(mxCellState state, mxPoint delta)
	{
		return delta != null && (delta.getX() != 0 || delta.getY() != 0);
	}

	/**
	 * Returns the vector between the current rendered state and the future
	 * location of the state after the display will be updated.
	 */
	protected mxPoint getDelta(mxCellState state)
	{
		mxGraph graph = graphComponent.getGraph();
		mxPoint origin = getOriginForCell(state.getCell());
		mxPoint translate = graph.getView().getTranslate();
		double scale = graph.getView().getScale();
		mxPoint current = new mxPoint(state.getX() / scale - translate.getX(),
				state.getY() / scale - translate.getY());

		return new mxPoint((origin.getX() - current.getX()) * scale, (origin
				.getY() - current.getY())
				* scale);
	}

	/**
	 * Returns the top, left corner of the given cell.
	 */
	protected mxPoint getOriginForCell(Object cell)
	{
		mxPoint result = origins.get(cell);

		if (result == null)
		{
			mxGraph graph = graphComponent.getGraph();

			if (cell != null)
			{
				result = new mxPoint(getOriginForCell(graph.getModel()
						.getParent(cell)));
				mxGeometry geo = graph.getCellGeometry(cell);

				// TODO: Handle offset, relative geometries etc
				if (geo != null)
				{
					result.setX(result.getX() + geo.getX());
					result.setY(result.getY() + geo.getY());
				}
			}

			if (result == null)
			{
				mxPoint t = graph.getView().getTranslate();
				result = new mxPoint(-t.getX(), -t.getY());
			}

			origins.put(cell, result);
		}

		return result;
	}

	/**
	 *
	 */
	public void paint(Graphics g)
	{
		if (preview != null)
		{
			preview.paint(g);
		}
	}

}