org.jgraph.graph.GraphTransferable Maven / Gradle / Ivy
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/*
* @(#)GraphTransferable.java 1.0 03-JUL-04
*
* Copyright (c) 2001-2004 Gaudenz Alder
*
*/
package org.jgraph.graph;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
import java.util.Map;
import org.jgraph.plaf.basic.BasicGraphTransferable;
/**
* An object that represents the clipboard contents for a graph selection.
* The object has three representations:
*
* 1. Richer: The cells, view attributes and connections for this selection are
* stored as separate datastructures, which can be inserted using
* the GraphModel.insert() method.
* 2. HTML: If one cell is selected, the userObject is returned as HTML.
* 3. Plain: The userObject of the selected cell is returned as plain text.
*
* @author Gaudenz Alder
* @version 1.0 1/1/02
*
*/
public class GraphTransferable
extends BasicGraphTransferable
implements Serializable, ClipboardOwner {
/** Local Machine Reference Data Flavor. */
public static DataFlavor dataFlavor;
/** Selected cells. */
protected Object[] cells;
/** Object that describes the connection between cells. */
protected ConnectionSet cs;
/** Object that describes the group structure between cells. */
protected ParentMap pm;
/** (Cell, Map) entries that hold the view attributes for the cells. */
protected Map attributeMap;
/** Rectangle that defines the former bounds of the views. */
protected Rectangle2D bounds;
/**
* Constructs a new transferable selection for cells,
* csand attrMap.
*/
public GraphTransferable(
Object[] cells,
Map attrMap,
Rectangle2D bounds,
ConnectionSet cs,
ParentMap pm) {
attributeMap = attrMap;
this.bounds = bounds;
this.cells = cells;
this.cs = cs;
this.pm = pm;
}
/**
* Returns the cells that represent the selection.
*/
public Object[] getCells() {
return cells;
}
/**
* Returns the connections between cells (and possibly
* other, unselected cells).
*/
public ConnectionSet getConnectionSet() {
return cs;
}
public ParentMap getParentMap() {
return pm;
}
/**
* Returns a map of (GraphCell, Map)-pairs that represent the
* view attributes for the respecive cells.
*/
public Map getAttributeMap() {
return attributeMap;
}
public Rectangle2D getBounds() {
return bounds;
}
// from ClipboardOwner
public void lostOwnership(Clipboard clip, Transferable contents) {
// do nothing
}
// --- Richer ----------------------------------------------------------
/**
* Returns the jvm-localreference flavors of the transferable.
*/
public DataFlavor[] getRicherFlavors() {
return new DataFlavor[] { dataFlavor };
}
/**
* Fetch the data in a jvm-localreference format.
*/
public Object getRicherData(DataFlavor flavor)
throws UnsupportedFlavorException {
if (flavor.equals(dataFlavor))
return this;
else
throw new UnsupportedFlavorException(flavor);
}
// --- Plain ----------------------------------------------------------
/**
* Returns true if the transferable support a text/plain format.
*/
public boolean isPlainSupported() {
return (cells != null && cells.length == 1);
}
/**
* Fetch the data in a text/plain format.
*/
public String getPlainData() {
if (cells[0] instanceof DefaultGraphCell) {
Object obj = ((DefaultGraphCell) cells[0]).getUserObject();
if (obj != null)
return obj.toString();
}
return cells[0].toString();
}
// --- HTML ---------------------------------------------------------
/**
* Returns true if the transferable support a text/html format.
*/
public boolean isHTMLSupported() {
return isPlainSupported();
}
/**
* Fetch the data in a text/html format.
*/
public String getHTMLData() {
StringBuffer buf = new StringBuffer();
buf.append("
");
buf.append(getPlainData());
buf.append("
");
return buf.toString();
}
/* Local Machine Reference Data Flavor. */
static {
DataFlavor localDataFlavor;
try {
localDataFlavor =
new DataFlavor(
DataFlavor.javaJVMLocalObjectMimeType
+ "; class=org.jgraph.graph.GraphTransferable");
} catch (ClassNotFoundException cnfe) {
localDataFlavor = null;
}
dataFlavor = localDataFlavor;
}
}