package com.vci.client.workflow.editor;
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import java.awt.Color;
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import java.awt.Dimension;
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import java.awt.FlowLayout;
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import java.awt.Font;
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import java.awt.Point;
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import java.awt.datatransfer.DataFlavor;
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import java.awt.dnd.DnDConstants;
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import java.awt.dnd.DragGestureEvent;
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import java.awt.dnd.DragGestureListener;
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import java.awt.dnd.DragSource;
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import java.awt.event.MouseAdapter;
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import java.awt.event.MouseEvent;
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import javax.swing.ImageIcon;
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import javax.swing.JComponent;
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import javax.swing.JLabel;
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import javax.swing.JPanel;
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import javax.swing.JScrollPane;
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import javax.swing.TransferHandler;
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import javax.swing.border.LineBorder;
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import com.mxgraph.model.mxCell;
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import com.mxgraph.model.mxGeometry;
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import com.mxgraph.swing.util.mxGraphTransferable;
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import com.mxgraph.swing.util.mxSwingConstants;
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import com.mxgraph.util.mxConstants;
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import com.mxgraph.util.mxEvent;
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import com.mxgraph.util.mxEventObject;
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import com.mxgraph.util.mxEventSource;
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import com.mxgraph.util.mxEventSource.mxIEventListener;
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import com.mxgraph.util.mxPoint;
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import com.mxgraph.util.mxRectangle;
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import com.mxgraph.view.mxGraph;
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import com.vci.client.workflow.editor.ui.IProcessProperty;
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public class EditorPalette extends JPanel {
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private static final long serialVersionUID = 8470805668097198382L;
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protected JLabel selectedEntry = null;
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private mxGraph graph;
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protected mxEventSource eventSource = new mxEventSource(this);
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@SuppressWarnings("serial")
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public EditorPalette() {
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setBackground(Color.WHITE);
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setLayout(new FlowLayout(FlowLayout.LEADING, 5, 5));
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// Clears the current selection when the background is clicked
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addMouseListener(new MouseAdapter() {
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public void mousePressed(MouseEvent e) {
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clearSelection();
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}
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});
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// Shows a nice icon for drag and drop but doesn't import anything
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setTransferHandler(new TransferHandler() {
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public boolean canImport(JComponent comp, DataFlavor[] flavors) {
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return true;
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}
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});
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}
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public void clearSelection() {
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setSelectionEntry(null, null);
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}
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public void setSelectionEntry(JLabel entry, mxGraphTransferable t) {
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JLabel previous = selectedEntry;
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selectedEntry = entry;
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if (previous != null) {
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previous.setBorder(null);
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previous.setOpaque(false);
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}
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if (selectedEntry != null) {
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selectedEntry.setBorder(new LineBorder(Color.BLUE));
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selectedEntry.setOpaque(true);
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selectedEntry.setBackground(new Color(117, 195, 173));
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}
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eventSource.fireEvent(new mxEventObject(mxEvent.SELECT, "entry",
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selectedEntry, "transferable", t, "previous", previous));
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}
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/**
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*
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*/
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public void setPreferredWidth(int width) {
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int cols = Math.max(1, width / 55);
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setPreferredSize(new Dimension(width,
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(getComponentCount() * 55 / cols) + 30));
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revalidate();
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}
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/**
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*
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* @param name
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* @param icon
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* @param style
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* @param width
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* @param height
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* @param value
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*/
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public void addEdgeTemplate(final String name, ImageIcon icon,
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String style, int width, int height, Object value)
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{
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mxGeometry geometry = new mxGeometry(0, 0, width, height);
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geometry.setTerminalPoint(new mxPoint(0, height), true);
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geometry.setTerminalPoint(new mxPoint(width, 0), false);
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geometry.setRelative(true);
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mxCell cell = new mxCell(value, geometry, style);
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cell.setEdge(true);
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addTemplate(name, icon, cell);
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}
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/**
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*
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* @param name
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* @param icon
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* @param style
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* @param width
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* @param height
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* @param value
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*/
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public void addTemplate(final String name, ImageIcon icon, String style,
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int width, int height, Object value)
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{
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mxCell cell = new mxCell(value, new mxGeometry(0, 0, width, height),
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style);
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cell.setVertex(true);
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addTemplate(name, icon, cell);
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}
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/**
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*
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* @param name
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* @param icon
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* @param cell
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*/
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public void addTemplate(final String name, ImageIcon icon, mxCell cell)
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{
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mxRectangle bounds = (mxGeometry) cell.getGeometry().clone();
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final mxGraphTransferable t = new mxGraphTransferable(
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new Object[] { cell }, bounds);
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// Scales the image if it's too large for the library
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if (icon != null)
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{
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if (icon.getIconWidth() > 32 || icon.getIconHeight() > 32)
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{
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icon = new ImageIcon(icon.getImage().getScaledInstance(32, 32,
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0));
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}
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}
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final JLabel entry = new JLabel(icon);
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entry.setPreferredSize(new Dimension(60, 60));
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entry.setBackground(getBackground().brighter());
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entry.setFont(new Font(entry.getFont().getFamily(), 0, 12));
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entry.setVerticalTextPosition(JLabel.BOTTOM);
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entry.setHorizontalTextPosition(JLabel.CENTER);
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entry.setIconTextGap(0);
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entry.setToolTipText(name);
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entry.setText(name);
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entry.addMouseListener(new MouseAdapter() {
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public void mousePressed(MouseEvent e) {
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setSelectionEntry(entry, t);
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}
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});
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// Install the handler for dragging nodes into a graph
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DragGestureListener dragGestureListener = new DragGestureListener() {
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public void dragGestureRecognized(DragGestureEvent e) {
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JLabel label=(JLabel)e.getComponent();
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if (label.getText().equals("开始")) {
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Object parent = graph.getDefaultParent();
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Object[] cells = graph.getChildCells(parent);
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boolean hasStart=false;
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for (Object cell : cells) {
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if (!graph.getModel().isEdge(cell)){
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IProcessProperty tool = (IProcessProperty)((mxCell)cell).getValue();
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if (tool.getNodeType().equals("start")) {
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hasStart=true;
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break;
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}
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}
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}
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if (!hasStart) {
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e.startDrag(null, mxSwingConstants.EMPTY_IMAGE, new Point(),
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t, null);
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}
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}else {
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e.startDrag(null, mxSwingConstants.EMPTY_IMAGE, new Point(),
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t, null);
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}
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// e.startDrag(null, mxConstants.EMPTY_IMAGE, new Point(), t, null);
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}
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};
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DragSource dragSource = new DragSource();
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dragSource.createDefaultDragGestureRecognizer(entry,
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DnDConstants.ACTION_COPY, dragGestureListener);
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add(entry);
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}
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/**
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* @param eventName
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* @param listener
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* @see com.mxgraph.util.mxEventSource#addListener(java.lang.String, com.mxgraph.util.mxEventSource.mxIEventListener)
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*/
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public void addListener(String eventName, mxIEventListener listener)
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{
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eventSource.addListener(eventName, listener);
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}
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/**
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* @return whether or not event are enabled for this palette
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* @see com.mxgraph.util.mxEventSource#isEventsEnabled()
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*/
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public boolean isEventsEnabled()
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{
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return eventSource.isEventsEnabled();
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}
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/**
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* @param listener
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* @see com.mxgraph.util.mxEventSource#removeListener(com.mxgraph.util.mxEventSource.mxIEventListener)
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*/
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public void removeListener(mxIEventListener listener)
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{
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eventSource.removeListener(listener);
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}
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/**
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* @param eventName
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* @param listener
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* @see com.mxgraph.util.mxEventSource#removeListener(java.lang.String, com.mxgraph.util.mxEventSource.mxIEventListener)
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*/
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public void removeListener(mxIEventListener listener, String eventName)
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{
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eventSource.removeListener(listener, eventName);
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}
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/**
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* @param eventsEnabled
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* @see com.mxgraph.util.mxEventSource#setEventsEnabled(boolean)
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*/
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public void setEventsEnabled(boolean eventsEnabled)
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{
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eventSource.setEventsEnabled(eventsEnabled);
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}
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public void setGraph(mxGraph graph) {
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this.graph = graph;
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}
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}
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