ChordMenuItem.java

package org.herac.tuxguitar.gui.items.menu;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.ToolItem;
import org.herac.tuxguitar.gui.TuxGuitar;
import org.herac.tuxguitar.gui.actions.insert.InsertChordAction;
import org.herac.tuxguitar.gui.items.MenuItems;
import org.herac.tuxguitar.song.models.TGChord;

public class ChordMenuItem extends MenuItems {
  private MenuItem chordMenuItem;
  private MenuItem insertChord;
  private long lastEdit;
  private Menu menu;

  private MenuItem[] subMenuItems;

  public ChordMenuItem(Shell shell, Menu parent, int style) {
    this.chordMenuItem = new MenuItem(parent, style);
    this.menu = new Menu(shell, SWT.DROP_DOWN);
  }

  public void addItems() {
    this.disposeItems();
    this.subMenuItems = new MenuItem[TuxGuitar.instance()
        .getCustomChordManager().countChords()];
    for (int i = 0; i < this.subMenuItems.length; i++) {
      TGChord chord = TuxGuitar.instance().getCustomChordManager().getChord(i);
      this.subMenuItems[i] = new MenuItem(this.menu, SWT.PUSH);
      this.subMenuItems[i].setData(chord);
      this.subMenuItems[i].setText(chord.getName());
      this.subMenuItems[i].addSelectionListener(TuxGuitar.instance().getAction(
          InsertChordAction.NAME));
    }
  }

  public void disposeItems() {
    if (this.subMenuItems != null) {
      for (int i = 0; i < this.subMenuItems.length; i++) {
        this.subMenuItems[i].dispose();
      }
    }
  }

  public void loadIcons() {
    // Nothing to do
  }

  public void loadProperties() {
    setMenuItemTextAndAccelerator(this.chordMenuItem, "chord", null);
    setMenuItemTextAndAccelerator(this.insertChord, "insert.chord",
        InsertChordAction.NAME);
  }

  public void showItems() {
    // --INSERT CHORD--
    this.insertChord = new MenuItem(this.menu, SWT.PUSH);
    this.insertChord.addSelectionListener(TuxGuitar.instance().getAction(
        InsertChordAction.NAME));
    // --SEPARATOR--
    new MenuItem(this.menu, SWT.SEPARATOR);
    // --CUSTOM CHORDS--
    this.addItems();

    this.chordMenuItem.setMenu(this.menu);

    this.loadIcons();
    this.loadProperties();
  }

  public void update() {
    boolean running = TuxGuitar.instance().getPlayer().isRunning();
    if (this.lastEdit != TuxGuitar.instance().getCustomChordManager()
        .getLastEdit()) {
      this.addItems();
      this.lastEdit = TuxGuitar.instance().getCustomChordManager()
          .getLastEdit();
    }
    this.insertChord.setEnabled(!running);
    for (int i = 0; i < this.subMenuItems.length; i++) {
      this.subMenuItems[i].setEnabled(!running);
    }
  }

  public void widgetSelected(SelectionEvent event) {
    if (event.detail == SWT.ARROW && this.subMenuItems != null
        && this.subMenuItems.length > 0) {
      ToolItem item = (ToolItem) event.widget;
      Rectangle rect = item.getBounds();
      Point pt = item.getParent().toDisplay(new Point(rect.x, rect.y));
      this.menu.setLocation(pt.x, pt.y + rect.height);
      this.menu.setVisible(true);
    } else {
      TuxGuitar.instance().getAction(InsertChordAction.NAME).process(event);
    }
  }
}