/**
* $Id: EditorPalette.java,v 1.1 2012/11/15 13:26:46 gaudenz Exp $
* Copyright (c) 2007-2012, JGraph Ltd
*/
package com.mxgraph.examples.swing.editor;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.datatransfer.DataFlavor;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.TransferHandler;
import com.mxgraph.model.mxCell;
import com.mxgraph.model.mxGeometry;
import com.mxgraph.swing.util.mxGraphTransferable;
import com.mxgraph.swing.util.mxSwingConstants;
import com.mxgraph.util.mxEvent;
import com.mxgraph.util.mxEventObject;
import com.mxgraph.util.mxEventSource;
import com.mxgraph.util.mxPoint;
import com.mxgraph.util.mxRectangle;
import com.mxgraph.util.mxEventSource.mxIEventListener;
public class EditorPalette extends JPanel
{
/**
*
*/
private static final long serialVersionUID = 7771113885935187066L;
/**
*
*/
protected JLabel selectedEntry = null;
/**
*
*/
protected mxEventSource eventSource = new mxEventSource(this);
/**
*
*/
protected Color gradientColor = new Color(117, 195, 173);
/**
*
*/
@SuppressWarnings("serial")
public EditorPalette()
{
setBackground(new Color(149, 230, 190));
setLayout(new FlowLayout(FlowLayout.LEADING, 5, 5));
// Clears the current selection when the background is clicked
addMouseListener(new MouseListener()
{
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
*/
public void mousePressed(MouseEvent e)
{
clearSelection();
}
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
*/
public void mouseClicked(MouseEvent e)
{
}
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseEntered(java.awt.event.MouseEvent)
*/
public void mouseEntered(MouseEvent e)
{
}
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseExited(java.awt.event.MouseEvent)
*/
public void mouseExited(MouseEvent e)
{
}
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
*/
public void mouseReleased(MouseEvent e)
{
}
});
// Shows a nice icon for drag and drop but doesn't import anything
setTransferHandler(new TransferHandler()
{
public boolean canImport(JComponent comp, DataFlavor[] flavors)
{
return true;
}
});
}
/**
*
*/
public void setGradientColor(Color c)
{
gradientColor = c;
}
/**
*
*/
public Color getGradientColor()
{
return gradientColor;
}
/**
*
*/
public void paintComponent(Graphics g)
{
if (gradientColor == null)
{
super.paintComponent(g);
}
else
{
Rectangle rect = getVisibleRect();
if (g.getClipBounds() != null)
{
rect = rect.intersection(g.getClipBounds());
}
Graphics2D g2 = (Graphics2D) g;
g2.setPaint(new GradientPaint(0, 0, getBackground(), getWidth(), 0,
gradientColor));
g2.fill(rect);
}
}
/**
*
*/
public void clearSelection()
{
setSelectionEntry(null, null);
}
/**
*
*/
public void setSelectionEntry(JLabel entry, mxGraphTransferable t)
{
JLabel previous = selectedEntry;
selectedEntry = entry;
if (previous != null)
{
previous.setBorder(null);
previous.setOpaque(false);
}
if (selectedEntry != null)
{
selectedEntry.setBorder(ShadowBorder.getSharedInstance());
selectedEntry.setOpaque(true);
}
eventSource.fireEvent(new mxEventObject(mxEvent.SELECT, "entry",
selectedEntry, "transferable", t, "previous", previous));
}
/**
*
*/
public void setPreferredWidth(int width)
{
int cols = Math.max(1, width / 55);
setPreferredSize(new Dimension(width,
(getComponentCount() * 55 / cols) + 30));
revalidate();
}
/**
*
* @param name
* @param icon
* @param style
* @param width
* @param height
* @param value
*/
public void addEdgeTemplate(final String name, ImageIcon icon,
String style, int width, int height, Object value)
{
mxGeometry geometry = new mxGeometry(0, 0, width, height);
geometry.setTerminalPoint(new mxPoint(0, height), true);
geometry.setTerminalPoint(new mxPoint(width, 0), false);
geometry.setRelative(true);
mxCell cell = new mxCell(value, geometry, style);
cell.setEdge(true);
addTemplate(name, icon, cell);
}
/**
*
* @param name
* @param icon
* @param style
* @param width
* @param height
* @param value
*/
public void addTemplate(final String name, ImageIcon icon, String style,
int width, int height, Object value)
{
mxCell cell = new mxCell(value, new mxGeometry(0, 0, width, height),
style);
cell.setVertex(true);
addTemplate(name, icon, cell);
}
/**
*
* @param name
* @param icon
* @param cell
*/
public void addTemplate(final String name, ImageIcon icon, mxCell cell)
{
mxRectangle bounds = (mxGeometry) cell.getGeometry().clone();
final mxGraphTransferable t = new mxGraphTransferable(
new Object[] { cell }, bounds);
// Scales the image if it's too large for the library
if (icon != null)
{
if (icon.getIconWidth() > 32 || icon.getIconHeight() > 32)
{
icon = new ImageIcon(icon.getImage().getScaledInstance(32, 32,
0));
}
}
final JLabel entry = new JLabel(icon);
entry.setPreferredSize(new Dimension(50, 50));
entry.setBackground(EditorPalette.this.getBackground().brighter());
entry.setFont(new Font(entry.getFont().getFamily(), 0, 10));
entry.setVerticalTextPosition(JLabel.BOTTOM);
entry.setHorizontalTextPosition(JLabel.CENTER);
entry.setIconTextGap(0);
entry.setToolTipText(name);
entry.setText(name);
entry.addMouseListener(new MouseListener()
{
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
*/
public void mousePressed(MouseEvent e)
{
setSelectionEntry(entry, t);
}
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
*/
public void mouseClicked(MouseEvent e)
{
}
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseEntered(java.awt.event.MouseEvent)
*/
public void mouseEntered(MouseEvent e)
{
}
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseExited(java.awt.event.MouseEvent)
*/
public void mouseExited(MouseEvent e)
{
}
/*
* (non-Javadoc)
* @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
*/
public void mouseReleased(MouseEvent e)
{
}
});
// Install the handler for dragging nodes into a graph
DragGestureListener dragGestureListener = new DragGestureListener()
{
/**
*
*/
public void dragGestureRecognized(DragGestureEvent e)
{
e
.startDrag(null, mxSwingConstants.EMPTY_IMAGE, new Point(),
t, null);
}
};
DragSource dragSource = new DragSource();
dragSource.createDefaultDragGestureRecognizer(entry,
DnDConstants.ACTION_COPY, dragGestureListener);
add(entry);
}
/**
* @param eventName
* @param listener
* @see com.mxgraph.util.mxEventSource#addListener(java.lang.String, com.mxgraph.util.mxEventSource.mxIEventListener)
*/
public void addListener(String eventName, mxIEventListener listener)
{
eventSource.addListener(eventName, listener);
}
/**
* @return whether or not event are enabled for this palette
* @see com.mxgraph.util.mxEventSource#isEventsEnabled()
*/
public boolean isEventsEnabled()
{
return eventSource.isEventsEnabled();
}
/**
* @param listener
* @see com.mxgraph.util.mxEventSource#removeListener(com.mxgraph.util.mxEventSource.mxIEventListener)
*/
public void removeListener(mxIEventListener listener)
{
eventSource.removeListener(listener);
}
/**
* @param eventName
* @param listener
* @see com.mxgraph.util.mxEventSource#removeListener(java.lang.String, com.mxgraph.util.mxEventSource.mxIEventListener)
*/
public void removeListener(mxIEventListener listener, String eventName)
{
eventSource.removeListener(listener, eventName);
}
/**
* @param eventsEnabled
* @see com.mxgraph.util.mxEventSource#setEventsEnabled(boolean)
*/
public void setEventsEnabled(boolean eventsEnabled)
{
eventSource.setEventsEnabled(eventsEnabled);
}
}